JP6647135B2 - Holding device for thin secondary batteries - Google Patents

Description

  The present invention relates to a thin secondary battery holding device. More specifically, the present invention relates to a holding device for a thin secondary battery such as a lithium ion secondary battery.

  BACKGROUND ART Conventionally, a chuck mechanism of a charge / discharge test device for a thin secondary battery has been proposed (see Patent Document 1). The chuck mechanism includes a first guide portion that can be coupled to a battery housing that holds a plurality of thin secondary batteries arranged in parallel, and a plurality of chuck portions that are connected to the first guide portion and are elastically arranged in parallel. Prepare. Each of the chuck portions has a second guide portion that elastically aligns with a predetermined number of corresponding thin secondary batteries in the battery housing.

JP 2012-3959 A

  However, in the charge / discharge test apparatus for a thin secondary battery described in Patent Document 1, the chuck mechanism of the charge / discharge test apparatus for a thin secondary battery has a configuration in which an electrode tab of the thin secondary battery is directly grasped. Therefore, there has been a problem that it is not possible to cope with holding a thin secondary battery in which the positions of the electrode tabs are different.

  The present invention has been made in view of such problems of the related art. Then, an object of the present invention is to provide a holding device capable of holding a thin secondary battery in which the positions of the electrode tabs are different.

  The present inventors have intensively studied to achieve the above object. As a result, it has been found that the above-mentioned object can be achieved by providing a predetermined plate-shaped holding member having the pressing portion, the shared terminal, the first dedicated terminal, and the second dedicated terminal, thereby completing the present invention. Reached.

  ADVANTAGE OF THE INVENTION According to this invention, the holding device which can hold | maintain the thin secondary battery from which the position of an electrode tab differs is provided.

FIG. 1 is a perspective view showing a holding device for a thin secondary battery according to one embodiment of the present invention. FIG. 2 is a perspective view showing a plate-shaped holding member in the holding device for a thin secondary battery according to one embodiment of the present invention. FIG. 3 is a perspective view showing a state where an example of a thin secondary battery is arranged on the plate-like holding member shown in FIG. FIG. 4 is a schematic cross-sectional view of the thin secondary battery shown in FIG. 3 along the line IV-IV. FIG. 5 is a perspective view showing a state in which another example of the thin secondary battery is arranged on the plate-like holding member shown in FIG. FIG. 6 is a schematic cross-sectional view of the thin secondary battery shown in FIG. 5 along the line VI-VI. FIG. 7 is a perspective view showing a state in which still another example of the thin secondary battery is arranged on the plate-like holding member shown in FIG. FIG. 8 is a schematic diagram showing a state in which still another example of the thin secondary battery is held in the thin secondary battery holding device according to one embodiment of the present invention. FIG. 9 is a schematic diagram showing a state in which another example of the thin secondary battery is held in the thin secondary battery holding device according to one embodiment of the present invention. FIG. 10 is a schematic diagram illustrating a state where an example of a thin secondary battery is sandwiched between the plate-shaped holding members illustrated in FIG. 3. FIG. 11 is a schematic diagram illustrating a state where another example of the thin secondary battery is sandwiched between the plate-shaped holding members illustrated in FIG. 5. FIG. 12 is a schematic diagram illustrating a state where still another example of the thin secondary battery is sandwiched between the plate-shaped holding members illustrated in FIG. 7.

  Hereinafter, a holding device for a thin secondary battery according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that the dimensional ratios in the drawings referred to in the following embodiments are exaggerated for the sake of explanation, and may differ from the actual ratios.

  FIG. 1 is a perspective view showing a holding device for a thin secondary battery according to one embodiment of the present invention. FIG. 2 is a perspective view showing a plate-shaped holding member in the thin secondary battery holding device according to one embodiment of the present invention.

  As shown in FIGS. 1 and 2, the thin secondary battery holding device 1 of the present embodiment includes a plate-shaped holding member 10 and a support member 20. Further, the thin secondary battery holding device 1 of the present embodiment includes a pressing member 30 that is added as necessary. Note that the plate-like holding member may be called a jacket, and the support member may be called a magazine.

  The plate-shaped holding member 10 is for holding a thin secondary battery. Although not particularly limited, for example, as shown in FIG. 2, the plate-shaped holding member 10 includes a pair of substantially rectangular plate-shaped holding members (11 , 11). Although described in detail later, the plate-shaped holding member 10 includes a pressing portion 12, a shared terminal 13, a first dedicated terminal 14, and a second dedicated terminal 15. Further, the plate-shaped holding member 10 has another terminal 13 'that is added as needed. When the other terminal 13 'is used as a common terminal, for example, the first dedicated terminal 14 becomes a second dedicated terminal, and the second dedicated terminal 15 becomes a first dedicated terminal. When the plate-like holding member 10 has a pair of substantially rectangular plate-like holding members (11, 11), each terminal preferably has a plate-like shape. In addition, each plate-shaped terminal may have a spring mechanism that is added as needed so as to securely hold the electrode tab of the thin secondary battery. Further, the plate-shaped holding member 10 has a core 16 that is added as needed. Further, the plate-shaped holding member 10 has a convex portion 17 formed as necessary. Further, the plate-shaped holding member 10 has a screw 18 for connecting a core 16 and the like added as necessary. In addition, the plate-shaped holding member 10 has a through hole 11a that is added as needed.

  Here, in the present invention, “substantially rectangular” means, for example, that a shared terminal and a first dedicated terminal or a second dedicated terminal can be connected to a pair of connection terminals of a charging device described later in detail. If there is, it may mean that it may be not only a square but also a rectangle.

  In the present invention, “substantially rectangular” may mean, for example, that the transport device may have a convex portion that can be used when gripping the plate-shaped holding member.

  The support member 20 supports the plate-like holding member 10 in a state where the plate-like holding members 10 and the thin secondary batteries (not shown) are alternately arranged. Then, although not particularly limited, for example, as shown in FIG. 1, the support member 20 preferably has a support plate 22 that supports the plate-shaped holding member 10. Although not particularly limited, as shown in FIG. 1, the support plate 22 is attached to a rod-shaped support member 23. Further, the rod-shaped support member 23 is attached to the support member main body 21. The rod-shaped support member 23 may be detachable from the support member main body 21. Further, although not particularly limited, for example, as shown in FIG. 1, the support member 20 includes a plate-shaped holding member 10 and a thin secondary battery (not shown) indicated by an arrow Z in the drawing. It is preferable to hold the shape holding members 10 side by side in the thickness direction. Further, although not particularly limited, the support member 20 may house the plate-shaped holding member 10.

  Further, the pressing member 30 presses the plate-shaped holding member 10. Although not particularly limited, for example, as shown in FIG. 1, the pressing member 30 preferably includes a pressing plate 31 and a pressing screw 32 for pressing the pressing plate 31. Although not particularly limited, as shown in FIG. 1, a through hole 21b through which a pressure screw 32 is screwed and formed is formed in the upper surface 21a of the support member main body 21. Note that a thread groove (not shown) is formed in the through hole 21b. Then, when the pressing screw 32 rotates in a predetermined direction, the pressing screw 32 moves downward in FIG. As a result, the pressing screw 32 presses the pressing plate 31, and the pressing plate 31 presses the plate-shaped holding member 10.

  FIG. 3 is a perspective view showing a state in which a normal-sized thin secondary battery for an electric vehicle, which is an example of the thin secondary battery, is arranged on the plate-shaped holding member shown in FIG. FIG. 4 is a schematic cross-sectional view of the thin secondary battery shown in FIG. 3 along the line IV-IV. FIG. 5 is a perspective view showing a state in which a normal-size thin secondary battery for a hybrid electric vehicle, which is another example of the thin secondary battery, is arranged on the plate-shaped holding member shown in FIG. FIG. 6 is a schematic cross-sectional view of the thin secondary battery shown in FIG. 5 along the line VI-VI. FIG. 7 is a perspective view showing a state where a 薄型 size thin secondary battery for an electric vehicle, which is still another example of the thin secondary battery, is arranged on the plate-shaped holding member shown in FIG. . 3, 5 and 7, the illustration of the upper part of the plate-shaped holding member is omitted. The same components as those described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

  As shown in FIGS. 3 to 7, the plate-shaped holding member 10 is for holding a thin secondary battery 100 (101, 102, 103) in which the power generation element 110 is sealed with a sheet-shaped exterior material 130. is there. The plate-shaped holding member 10 has a pressing portion 12, a shared terminal 13, a first dedicated terminal 14, and a second dedicated terminal 15.

  The pressing portion 12 is used to hold the first thin secondary battery (101, 103) in which both the positive electrode tab 121 and the negative electrode tab 122 protrude from one end of the exterior material 130. The (101, 103) power generation element 110 is pressed (see FIGS. 3, 4, and 7). On the other hand, the pressing portion 12 is configured to hold the second thin secondary battery 102 in which the positive electrode tab 121 protrudes from one end of the outer packaging material 130 and the negative electrode tab 122 protrudes from the other end of the outer packaging material 130. The power generating element 110 of the thin secondary battery 102 is pressed (see FIGS. 5 and 6). Note that a typical example of the pressing portion 12 is a portion where the plate-shaped holding member 10 contacts the exterior material 130. However, the present invention is not limited to this. For example, when the plate-shaped holding member has a core, the pressing portion may be a portion where the core provided on the plate-shaped holding member contacts the exterior material.

  The common terminal 13 contacts one electrode tab of the first thin secondary battery (101, 103) when the plate-shaped holding member 10 holds the first thin secondary battery (101, 103). In FIGS. 3 and 7, one of the electrode tabs is a positive electrode tab 121. On the other hand, the common terminal 13 is in contact with one electrode tab of the second thin secondary battery 102 when the plate-shaped holding member 10 holds the second thin secondary battery 102. In FIG. 5, one of the electrode tabs is a negative electrode tab 122.

  Further, the first dedicated terminal 14 is arranged beside the common terminal 13 on the side of the pressing portion 12. When the plate-shaped holding member 10 holds the first thin secondary battery (101, 103), the first dedicated terminal 14 is connected to one of the electrode tabs of the first thin secondary battery (101, 103). The other electrode tab of the first thin secondary battery (101, 103) is in contact with the common terminal 13 while the other is in contact with the common terminal 13. 3 and 7, one electrode tab is a positive electrode tab 121 and the other electrode tab is a negative electrode tab 122. The first dedicated terminal 14 is disposed at a position where the common terminal is located when the plate-shaped holding member 10 is rotated clockwise by 90 degrees or 270 degrees in a plane with respect to the center of the plate-shaped holding member 10. May be used.

  Further, the second dedicated terminal 15 is arranged on the opposite side of the shared terminal 13 with the pressing portion 12 interposed therebetween. When the plate-shaped holding member 10 holds the second thin secondary battery 102, the second dedicated terminal 15 is in a state where one electrode tab of the second thin secondary battery is in contact with the shared terminal 13. The other electrode tab of the second thin secondary battery 102 contacts. In FIG. 5, one electrode tab is a negative electrode 122 and the other electrode tab is a positive electrode tab 121. The second dedicated terminal 15 is disposed at a position where the common terminal is located when the plate-shaped holding member 10 is rotated clockwise by 90 degrees or 270 degrees in a plane with respect to the center of the plate-shaped holding member 10. May be used.

  Although not particularly limited, each component of the thin secondary battery will be described by taking a lithium ion secondary battery as an example.

  The lithium ion secondary battery has a configuration in which a power generation element 110 to which a positive electrode tab 121 and a negative electrode tab 122 are attached is sealed inside an exterior body 130. Then, the positive electrode tab 121 and the negative electrode tab 122 are led out from the inside of the exterior material 130 to the outside in the same direction or the opposite direction. In addition, such a positive electrode tab and a negative electrode tab can be attached to a positive electrode current collector and a negative electrode current collector described later by, for example, ultrasonic welding or resistance welding.

  The positive electrode tab 121 and the negative electrode tab 122 are, for example, aluminum, copper, titanium, nickel, stainless steel (SUS), alloys thereof, cladding materials thereof, and the like, which are conventionally used as electrode tabs for lithium ion secondary batteries. Can be used. The electrode tab separately prepared may be connected to a positive electrode current collector and a negative electrode current collector described later, or the electrode tab may be formed by extending each of the positive electrode current collector and each negative electrode current collector described below. May be.

  As the exterior material 130, for example, a sheet-shaped exterior material is applied from the viewpoint of miniaturization and weight reduction. When applied to an automobile, from the viewpoint that heat is efficiently transmitted from a heat source of the automobile and the inside of the battery can be quickly heated to the battery operating temperature, for example, a polymer-metal composite laminate sheet having excellent thermal conductivity is used. Is preferred.

  The power generating element 110 in the lithium ion secondary battery includes a positive electrode 111 having a positive electrode active material layer 111B formed on both surfaces of a positive electrode current collector 111A, an electrolyte layer 113, and a negative electrode formed on both surfaces of a negative electrode current collector 112A. It has a configuration in which a plurality of anodes 112 on which an active material layer 112B is formed are stacked. At this time, the positive electrode active material layer 111B formed on one surface of the positive electrode current collector 111A of one positive electrode 111 and one surface of the negative electrode current collector 112A of the negative electrode 112 adjacent to the one positive electrode 111 are formed. A plurality of positive electrodes, an electrolyte layer, and a negative electrode are stacked in this order such that the negative electrode active material layer 112B faces through the electrolyte layer 113. Accordingly, the adjacent positive electrode active material layer 111B, electrolyte layer 113, and negative electrode active material layer 112B constitute one unit cell layer 114. Therefore, the lithium ion secondary battery has a configuration in which a plurality of unit cell layers 114 are stacked to be electrically connected in parallel. The negative electrode current collector 112A located at the outermost layer of the power generation element 110 has a negative electrode active material layer 112B formed only on one surface. In addition, an insulating layer (not shown) for insulating between the adjacent positive electrode current collector and negative electrode current collector may be provided on the outer periphery of the unit cell layer. Such an insulating layer preferably retains the electrolyte contained in the electrolyte layer or the like, and is preferably formed on the outer periphery of the unit cell layer with a material that prevents leakage of the electrolyte. Specifically, general-purpose plastics such as polypropylene (PP), polyethylene (PE), polyurethane (PUR), polyamide resin (PA), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVdF), and polystyrene (PS) Or a thermoplastic olefin rubber. Also, silicone rubber can be used.

  The positive electrode current collector 111A and the negative electrode current collector 112A are made of, for example, a conductive material such as an aluminum foil, a copper foil, and a stainless steel (SUS) foil. However, the present invention is not limited thereto, and a conventionally known material used as a current collector for a lithium ion secondary battery can be used.

  The positive electrode active material layer 111B includes, as a positive electrode active material, a conventionally known material used as a positive electrode active material for a lithium ion secondary battery, and optionally includes a binder and a conductive additive. Is also good.

  As the positive electrode active material, for example, a lithium-containing compound is preferable from the viewpoint of capacity and output characteristics. Examples of such a lithium-containing compound include a composite oxide containing lithium and a transition metal element, a phosphate compound containing lithium and a transition metal element, a sulfate compound containing lithium and a transition metal element, and lithium and a transition metal. Although a solid solution containing an element is included, a lithium-transition metal composite oxide is particularly preferable from the viewpoint of obtaining higher capacity and output characteristics.

Specific examples of the composite oxide containing lithium and a transition metal element include lithium cobalt composite oxide (LiCoO ₂ ), lithium nickel composite oxide (LiNiO ₂ ), lithium nickel cobalt composite oxide (LiNiCoO ₂ ), lithium nickel Manganese composite oxide (LiNi _0.5 Mn _1.5 O ₄ ), lithium nickel manganese cobalt composite oxide (Li (NiMnCo) O ₂ , Li (LiNiMnCo) O ₂ ), lithium manganese composite oxide having a spinel structure (LiMn ₂ O ₄ ) and the like. Further, specific examples of the phosphate compound containing lithium and a transition metal element include a lithium iron phosphate compound (LiFePO ₄ ) and a lithium iron manganese phosphate compound (LiFeMnPO ₄ ). In these composite oxides, for the purpose of stabilizing the structure and the like, there may be mentioned those in which part of the transition metal is replaced by another element.

Specific examples of the solid solution containing lithium and a transition metal ^{_{element, + xLiM I O 2 · (}} 1-x) Li 2 M II O 3 (0 <x <1, M I is the average oxidation state ^{3, M II} is an average One or more transition metal elements having an oxidation state of 4+), LiM ^III O ₂ —LiMn ₂ O ₄ (M ^III is a transition metal element such as Ni, Mn, Co, and Fe).

  As the binder, polyvinylidene fluoride (PVdF), polytetrafluoroethylene (PTFE), polyvinyl acetate, polyimide (PI), polyamide (PA), polyvinyl chloride (PVC), polymethyl acrylate (PMA), polymethyl methacrylate (PMMA), thermoplastic resins such as polyether nitrile (PEN), polyethylene (PE), polypropylene (PP) and polyacrylonitrile (PAN); thermosetting resins such as epoxy resin, polyurethane resin and urea resin; and styrene butadiene rubber (SBR) and the like. However, the material is not limited to these, and a known material conventionally used as a binder for a lithium ion secondary battery can be used. These binders may be used alone or in a combination of two or more.

  Examples of the conductive assistant include carbon materials such as carbon black such as acetylene black, graphite, and carbon fiber. However, the material is not limited to these, and a conventionally known material used as a conductive additive for a lithium ion secondary battery can be used. One of these conductive assistants may be used alone, or two or more thereof may be used in combination.

  The negative electrode active material layer 112B contains, as a negative electrode active material, one or more of negative electrode materials capable of inserting and extracting lithium, and contains a binder and a conductive additive as necessary. You may go out. Note that the binder and the conductive auxiliary agent described above can be used.

Examples of negative electrode materials capable of occluding and releasing lithium include, for example, graphite (natural graphite, artificial graphite, etc.) which is high crystalline carbon, low crystalline carbon (soft carbon, hard carbon), and carbon black (Ketjen). Black, acetylene black, channel black, lamp black, oil furnace black, thermal black, etc.), carbon materials such as fullerene, carbon nanotube, carbon nanofiber, carbon nanohorn, carbon fibril; Si, Ge, Sn, Pb, Al, In , Zn, H, Ca, Sr, Ba, Ru, Rh, Ir, Pd, Pt, Ag, Au, Cd, Hg, Ga, Tl, C, N, Sb, Bi, O, S, Se, Te, Cl Elementary elements that alloy with lithium, such as Oxide containing an element (silicon monoxide _{(SiO), SiO x (0} <x <2), tin dioxide _{(SnO 2), SnO x (} 0 <x <2), etc. SnSiO ₃₎ and carbide (silicon carbide ( A metal material such as lithium metal; and a lithium-transition metal composite oxide such as a lithium-titanium composite oxide (lithium titanate: Li ₄ Ti ₅ O ₁₂ ). However, the material is not limited thereto, and a conventionally known material used as a negative electrode active material for a lithium ion secondary battery can be used. One of these negative electrode active materials may be used alone, or two or more thereof may be used in combination.

  As the electrolyte layer 113, for example, an electrolyte solution or a polymer gel electrolyte held by a separator described below, a layer structure formed using a solid polymer electrolyte, further, a polymer gel electrolyte or a solid polymer electrolyte And those having a laminated structure formed using the same.

The electrolyte is preferably, for example, one usually used in a lithium ion secondary battery, and specifically has a form in which a lithium salt is dissolved in an organic solvent. Examples of the lithium _{salt, LiPF 6, LiBF 4, LiClO} 4, LiAsF 6, LiTaF 6, LiAlCl 4, Li 2 B 10 Cl 10 inorganic acid anion salts such _{as, LiCF 3 SO 3, Li (} CF 3 SO 2 _{) 2 N, Li (C 2} F 5 SO 2) selected from organic acid anion salts such as ₂ N, can include at least one lithium salt. Examples of the organic solvent include cyclic carbonates such as propylene carbonate (PC) and ethylene carbonate (EC); and chain carbonates such as dimethyl carbonate (DMC), methyl ethyl carbonate (EMC), and diethyl carbonate (DEC). Ethers such as tetrahydrofuran, 2-methyltetrahydrofuran, 1,4-dioxane, 1,2-dimethoxyethane, 1,2-dibutoxyethane; lactones such as γ-butyrolactone; nitriles such as acetonitrile; methyl propionate Amides such as dimethylformamide; and a mixture of at least one selected from methyl acetate and methyl formate, using an organic solvent such as an aprotic solvent, and the like. . In addition, as a separator, the microporous film which consists of polyolefins, such as polyethylene and polypropylene, can be mentioned, for example.

  Examples of the polymer gel electrolyte include those containing a polymer constituting the polymer gel electrolyte and an electrolyte at a conventionally known ratio. The polymer gel electrolyte is a solid polymer electrolyte having ion conductivity containing the above-mentioned electrolyte solution usually used in lithium ion secondary batteries, but is not limited thereto. A polymer in which a similar electrolyte is held in a polymer skeleton having no conductivity is also included. Examples of the polymer having no lithium ion conductivity used for the polymer gel electrolyte include polyvinylidene fluoride (PVdF), polyvinyl chloride (PVC), polyacrylonitrile (PAN), and polymethyl methacrylate (PMMA). it can. However, it is not limited to these. Note that PAN, PMMA, and the like belong to a class having almost no ionic conductivity, and thus may be a polymer having the above-mentioned ionic conductivity, but are used here as a polymer gel electrolyte. This is exemplified as a polymer having no lithium ion conductivity.

  Examples of the solid polymer electrolyte include those obtained by dissolving the lithium salt in polyethylene oxide (PEO), polypropylene oxide (PPO), or the like.

  As described above, by providing the following configurations (1) to (6), it is possible to provide a holding device capable of holding a thin secondary battery having different electrode tab positions.

(1) A plate-like holding member for holding a thin secondary battery in which a power generation element is sealed with a sheet-like outer material, and a plate-like holding state in which the plate-like holding member and the thin secondary battery are alternately arranged. And a supporting member for supporting the member.

(2) The plate-shaped holding member has a pressing portion, a shared terminal, a first dedicated terminal, and a second dedicated terminal.

(3) The pressing portion presses the power generating element of the first thin secondary battery when holding the first thin secondary battery in which both the positive electrode tab and the negative electrode tab protrude from one end of the exterior material. In addition, the pressing portion is configured to generate power of the second thin secondary battery when holding the second thin secondary battery in which the positive electrode tab protrudes from one end of the exterior material and the negative electrode tab protrudes from the other end of the exterior material. Press the element.

(4) The common terminal is in contact with one electrode tab of the first thin secondary battery when the plate-like holding member holds the first thin secondary battery, while the plate-like holding member is in contact with the second thin secondary battery. When the secondary battery is held, it is in contact with one electrode tab of the second thin secondary battery.

(5) The first dedicated terminal is arranged side by side with the common terminal on the side of the pressing portion, and one of the first thin secondary batteries when the plate-shaped holding member holds the first thin secondary battery. The other electrode tab of the first thin secondary battery contacts with the electrode tab of the first thin secondary battery in a state of contact with the common terminal.

(6) The second dedicated terminal is disposed on the opposite side of the common terminal with the pressing portion interposed therebetween, and is used to hold one of the second thin secondary batteries when the plate-shaped holding member holds the second thin secondary battery. The other electrode tab of the second thin secondary battery contacts with the electrode tab of the second thin secondary battery in a state of contact with the common terminal.

  In addition, there is a secondary advantage that the facility cost can be reduced by simplifying the structure of the plate-shaped holding member that needs to be prepared in large quantities. Furthermore, since the common terminal, the first dedicated terminal, and the second dedicated terminal that are in contact with the electrode tab are provided on the plate-shaped holding member, the position of the electrode tab is different in the thin secondary battery charge / discharge test device. The need for a chuck mechanism that can hold the secondary battery is eliminated. As a result, there is also a secondary advantage that the charge / discharge test device for a thin secondary battery can be simplified.

  Also, although not particularly limited, the thin secondary battery holding device includes, for example, a first thin secondary battery in which two electrode tabs project in one direction, and one electrode tab in both directions. It is possible to include a plate-shaped holding member for holding the second thin secondary battery described above, and a housing device that houses the plate-shaped holding members arranged in the thickness direction. At this time, it is preferable that the plate-shaped holding member includes a common terminal, and predetermined first and second dedicated terminals. The common terminal is in contact with one of the electrode tabs of the first thin secondary battery and the second thin secondary battery. Further, the first and second dedicated terminals are located at positions where the common terminal is located when the plate-shaped holding member is rotated clockwise by 90 degrees and 270 degrees in a plane with respect to the center thereof. And is in contact with one of the electrode tabs of the first thin secondary battery or the second thin secondary battery. An example of such a thin secondary battery holding device may be regarded as a preferred embodiment of the present invention, or may be different from the present invention.

  Further, although not particularly limited, in one example of the holding device for the thin secondary battery, the planar shape of the plate-shaped holding member is preferably substantially square. This is because when the plate-shaped holding member is rotated in a plane, the distance between the common terminal and the two dedicated terminals (the first dedicated terminal and the second dedicated terminal) becomes equal, and the charge / discharge test device and Is easy, and the transport of the jacket by the transport device is easy. Further, there is a secondary advantage that the thin secondary battery can be transported by the transport device regardless of the thickness of the thin secondary battery itself and the position of the electrode tab.

  Although not particularly limited, one example of the thin secondary battery holding device is such that the plate-shaped holding member rotates the plate-shaped holding member 180 degrees clockwise in a plane with respect to the center thereof. It is preferable that another terminal is disposed at a position where the common terminal is located when the terminal is located. In such a case, another terminal can be used as a common terminal, so that the period during which the plate-shaped holding member can be used can be extended.

  Furthermore, as described above, by providing the following configuration (7), it is possible to provide a holding device capable of reliably holding a thin secondary battery having different electrode tab positions.

(7) A pressure member for pressing the plate-shaped holding member is further provided.

  Further, as described above, by providing the following configuration (8), it is possible to provide a holding device having a simple configuration capable of reliably holding a thin secondary battery having different electrode tab positions.

(8) The pressure member has a pressure plate and a pressure screw for pressing the pressure plate.

  That is, by rotating the pressure screw in a predetermined direction, the pressure screw presses the pressure plate that can slide up and down in the inner space of the support member main body. Then, the pressing plate presses the plate-shaped holding member. Further, the plate-shaped holding member presses the power generating element of the thin secondary battery with a strong force. As a result, the thin secondary battery can be reliably held by the holding device having a simple configuration.

  Furthermore, as described above, by providing the following configuration (9), it is possible to provide a holding device having a simple configuration capable of reliably holding a thin secondary battery having different electrode tab positions.

(9) The plate-shaped holding member has a pair of substantially rectangular plate-shaped holding members that sandwich the thin secondary battery.

  That is, the thin secondary battery sandwiched between the pair of substantially rectangular plate-shaped holding members can be reliably held by the supporting members. It is also possible to adopt a configuration in which a pair of substantially rectangular plate-shaped holding members constituting the plate-shaped holding member sandwich the electrode tab with a pair of terminals.

  Further, as described above, by providing the following configuration (10), it is possible to provide a holding device having a simple configuration capable of holding a thin secondary battery having different electrode tab positions. Further, since the support member has a plurality of support plates supporting the plurality of plate-shaped holding members on the side surface of the support member main body, it is possible to prevent the plurality of plate-shaped holding members from being collapsed when being stacked in the inner space of the support member main body You can also.

(10) The support member has a support plate that supports the plate-shaped holding member.

  Furthermore, as described above, by providing the following configuration (11), a holding device capable of holding not only a position of the electrode tab but also a thin secondary battery having a different thickness of the thin secondary battery itself is provided. can do.

(11) The plate-shaped holding member further has a core.

  That is, when the thickness of the thin secondary battery itself is different, the plate-shaped holding member is provided with an adjustable number of cores. Thereby, thin secondary batteries having different thicknesses can be held.

  When the positions of the electrode tabs of the thin secondary battery are different, the positive electrode tab (or the negative electrode tab) of the first thin secondary battery or the second thin secondary battery is brought into contact with the common terminal, The negative electrode tab (or the positive electrode tab) of the thin secondary battery or the second thin secondary battery is brought into contact with the first dedicated terminal or the second dedicated terminal. Thus, a thin secondary battery having different electrode tab positions can be held.

  Next, a state in which the thin secondary battery is held by the thin secondary battery holding device will be described. FIG. 8 is a schematic diagram showing a state in which another example of a thin secondary battery is held in the thin secondary battery holding device according to one embodiment of the present invention. FIG. 9 is a schematic view showing a state where another example of the thin secondary battery is held in the thin secondary battery holding device according to one embodiment of the present invention. The same components as those described above are denoted by the same reference numerals, and detailed description will be omitted. 8 and 9, the description of each terminal is omitted.

  As shown in FIGS. 8 and 9, when the thickness of the thin secondary battery 100 is large with respect to the charging / discharging test apparatus 200 in which the distance between the connection terminals 210 is constant, the number of cores 16 is two. Thus, when the thickness of the thin secondary battery 100 is small, the connection position can be made constant by setting the number of the cores 16 to four. Thereby, not only the position of the electrode tab is different, but also a holding device capable of holding a thin secondary battery having a different thickness of the thin secondary battery itself. Further, in the charging / discharging test apparatus for a thin secondary battery, not only the positions of the electrode tabs are different but also a chuck mechanism that can handle a thin secondary battery having a different thickness of the thin secondary battery itself is not required. As a result, there is also a secondary advantage that the configuration of the charge / discharge test apparatus for a thin secondary battery can be simplified.

  Next, a state where the thin secondary battery is sandwiched between the plate-shaped holding members will be described. FIG. 10 is a schematic diagram illustrating a state in which a normal-sized thin secondary battery for an electric vehicle, which is an example of a thin secondary battery, is sandwiched between the plate-shaped holding members illustrated in FIG. 3. FIG. 11 is a schematic diagram showing a state in which a normal-size thin secondary battery for a hybrid electric vehicle, which is another example of the thin secondary battery, is sandwiched between the plate-shaped holding members shown in FIG. Further, FIG. 12 is a schematic diagram showing a state where a １ ／ size thin secondary battery for an electric vehicle, which is still another example of the thin secondary battery, is sandwiched between the plate-like holding members shown in FIG. . The same components as those described above are denoted by the same reference numerals, and detailed description will be omitted. 10 to 12, the description of the upper substantially rectangular plate-shaped holding member is omitted.

  As shown in FIGS. 10 and 12, a first thin secondary battery in which both a positive electrode tab 121 and a negative electrode tab 122 are provided at one end with respect to a charging / discharging test apparatus 200 in which the distance between connection terminals 210 is constant. In the case of (101, 103), connection is possible in the same direction (see FIGS. 3 and 7). On the other hand, as shown in FIG. 11, a second thin secondary having a positive electrode tab 121 at one end and a negative electrode tab 122 at the other end for a charge / discharge test apparatus 200 in which the distance between the connection terminals 210 is constant. In the case of the battery 102, the connection can be made by rotating the plate-shaped holding member 10 counterclockwise in the plane by 90 degrees (see FIG. 5).

  As described above, the present invention has been described with some embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made within the scope of the present invention.

  For example, in the above-described embodiment, a support member having a plurality of support plates has been described as an example. However, the present invention is not limited to this. The member may be provided with a through hole through which the guide rod penetrates, a so-called guide hole.

DESCRIPTION OF SYMBOLS 1 Holding device of thin secondary battery 10 Plate-shaped holding member 11 Substantially rectangular plate-shaped holding member 11a Through hole 12 Pressing part 13 Shared terminal 13 'Other terminal 14 First dedicated terminal 15 Second dedicated terminal 16 Core 17 Convex part 18 Screw 20 Support member 21 Support member main body 21a Upper surface 21b Through hole 22 Support plate 23 Bar-shaped support member 30 Press member 31 Press plate 32 Press screw 100 Thin secondary batteries 101, 103 First thin secondary battery 102 Second thin secondary battery 110 Power generating element 111 Positive electrode 111A Positive electrode current collector 111B Positive electrode active material layer 112 Negative electrode current collector 112B Negative electrode active material layer 113 Electrolyte layer 114 Single cell layer 121 Positive tab 122 Negative tab 130 Exterior material 200 charge / discharge test device 210 connection terminal

Claims (6)

A plate-shaped holding member for holding a thin secondary battery in which the power generation element is sealed with a sheet-shaped exterior material,
A supporting member that supports the plate-shaped holding member in a state where the plate-shaped holding member and the thin secondary battery are alternately arranged,
The plate-shaped holding member,
While holding the first thin secondary battery in which both the positive electrode tab and the negative electrode tab protrude from one end of the exterior material, while pressing the power generating element of the first thin secondary battery, A pressing portion that presses the power generating element of the second thin secondary battery when holding a second thin secondary battery in which a positive electrode tab protrudes from one end and a negative electrode tab protrudes from the other end of the exterior material. When,
When the plate-shaped holding member contacts the one electrode tab of the first thin secondary battery when holding the first thin secondary battery, the plate-shaped holding member contacts the second thin secondary battery. A common terminal that is in contact with one electrode tab of the second thin secondary battery when holding
One of the electrode tabs of the first thin secondary battery is arranged when the plate-shaped holding member holds the first thin secondary battery when the plate-like holding member holds the first thin secondary battery. A first dedicated terminal to which the other electrode tab of the first thin secondary battery is in contact with a common terminal;
One of the electrode tabs of the second thin secondary battery is disposed on the opposite side of the common terminal with the pressing portion therebetween, and the plate-shaped holding member holds the second thin secondary battery. A second dedicated terminal to which the other electrode tab of the second thin secondary battery is in contact with the common terminal, and a holding device for the thin secondary battery.   The holding device for a thin secondary battery according to claim 1, further comprising a pressing member that presses the plate-shaped holding member.   The holding device for a thin secondary battery according to claim 2, wherein the pressing member has a pressing plate and a pressing screw for pressing the pressing plate.   The holding device according to any one of claims 1 to 3, wherein the plate-shaped holding member has a pair of substantially rectangular plate-shaped holding members that sandwich the thin secondary battery. apparatus.   The holding device for a thin secondary battery according to any one of claims 1 to 4, wherein the support member has a support plate that supports the plate-like holding member.   The holding device for a thin secondary battery according to any one of claims 1 to 5, wherein the plate-shaped holding member further includes a core.

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