JP2016186864A - battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery capable of preventing positional deviation of an electrode unit.SOLUTION: An electrode unit 1 includes protruding pieces 16a and 16b, an electrode unit 2 including protruding pieces 26a and 26b, an electrode unit 3 including protruding pieces 36a and 36b, an electrode unit 4 including a protruding piece 46, and an electrode unit 5 including a protruding piece 56. The protruding pieces 16a and 16b are provided in a sealant 13, the protruding pieces 26a and 26b provided in a sealant 23, the protruding pieces 36a and 36b provided in a sealant 33, the protruding piece 46 provided in a sealant 43, and the protruding piece 56 provided in a sealant 53. The protruding pieces 16a and 26b are fastened together, and the protruding pieces 16b and 36a are also fastened together. Furthermore, the protruding pieces 26a and 46 are fastened together, and the protruding pieces 36b and 56 are also fastened together.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a battery including an electrode unit having an electrode material and a conductive material.

  Batteries are widely used in digital home appliances, electric vehicles, hybrid vehicles, solar power generation facilities, and the like. An example of this battery is a vanadium solid salt battery.

  A vanadium solid salt battery is configured by housing a cell in a case. The cell has a flat plate shape inside the exterior and includes a plurality of electrode units arranged in parallel in the stacking direction. The electrode unit has an electrode material and a conductive material. The electrode material includes a plate-shaped porous material, and an active material and an electrolytic solution containing vanadium ions or vanadium ions impregnated in the porous material.

  In a vanadium solid salt battery, a plurality of electrode units are juxtaposed with electrode materials of each electrode unit facing each other through a diaphragm. The vanadium solid salt battery performs charge / discharge using an oxidation-reduction reaction between the electrode material related to the positive electrode and the electrode material related to the negative electrode.

  The increase in the capacity of the battery is not limited to the vanadium solid salt battery, but can be performed in other batteries by increasing the number of electrode units arranged in parallel as disclosed in Patent Document 1, for example.

JP 2004-71290 A

  However, in the side-by-side structure of electrode units, when the reaction area is reduced due to the displacement of the two electrode members facing each other through the diaphragm, the capacity of the battery may be reduced.

  This invention is made | formed in view of such a situation, The place made into the objective is providing the battery which can prevent the position shift of the electrode unit arranged in parallel.

  The battery according to the present invention includes a plurality of electrode units arranged in parallel so that the surfaces are opposed to each other, and the electrode units protrude from a part of the peripheral portion, It has the 1st adhering part adhering to an electrode unit, and the 2nd adhering part adhering to the other electrode unit, It is characterized by the above-mentioned.

  According to the present invention, each electrode unit is fixed at a location different from the electrode units on both sides in the parallel direction. Therefore, since it adjoins for every adjacent electrode unit, each electrode unit can be fixed firmly and the position shift of an electrode unit can be prevented.

  In the battery according to the present invention, the electrode unit includes a plurality of electrode materials containing an active material and an acidic or alkaline electrolytic solution, a flat plate shape, and a conductive material whose both surfaces face the first electrode material. Two covering portions that are conductive and non-permeable to electrolyte solution, are provided between the electrode material and the conductive material, cover the both surfaces of the conductive material, and the electrode material is disposed on the surface; A first seal that is transparent, has a frame shape, surrounds the electrode material, is fixed to a peripheral edge of the two covering portions, and seals the conductive material with the covering portion; The portion and the second fixing portion protrude from the sealant.

  According to the present invention, the conductive material is sealed with the electrolyte solution-impermeable first covering portion, the second covering portion, and the sealant, and does not contact the electrode material. In particular, the conductive material does not directly contact the electrode material by the first covering portion. The side surface of the conductive material is covered with a sealant.

  Therefore, the electrolytic solution contained in the electrode material does not come into contact with the conductive material, and corrosion of the conductive material is prevented. Since the first covering portion is conductive, movement of electrons between the electrode material and the conductive material is secured.

  Furthermore, since the first fixing portion and the second fixing portion protrude from the sealant, it is easy to perform the fixing operation.

  The battery according to the present invention is characterized in that the electrode unit has a rectangular shape, and the first fixing portion and the second fixing portion are provided on the same side and are integrated.

  According to the present invention, since the first fixing portion and the second fixing portion are integrated, the first fixing portion and the second fixing portion can be easily provided rather than separately provided.

  In the battery according to the present invention, the electrode unit has a quadrangular shape, and the first fixing portion and the second fixing portion are provided on two different sides of the electrode unit.

  According to the present invention, since the first fixing portion and the second fixing portion are provided on two different sides, it is easy to perform work when each electrode unit is fixed.

  In the battery according to the present invention, the electrode unit has a rectangular shape, and has a tab that is a conductive material protruding from a part of a peripheral portion of the electrode unit. The first fixing portion and the second fixing portion are The tab is provided on a side other than the protruding side.

  According to the present invention, when the electrode unit is fixed, the tab does not get in the way and the operation is easy.

  In the battery according to the present invention, the electrode unit has a rectangular shape, and there are a plurality of the first fixing portions and the second fixing portions, and the first fixing portions are provided on two different sides of the electrode unit. The second fixing part is provided on two different sides of the electrode unit, respectively.

  According to the present invention, there are a plurality of first fixing portions and a plurality of second fixing portions, and each of the plurality of first fixing portions and the second fixing portions is provided on two different sides, so that it is possible to more reliably prevent the displacement of the electrode unit.

  The battery according to the present invention has an exterior covering the plurality of electrode units, and each electrode unit is connected to the exterior via a first fixing portion and a second fixing portion.

  According to the present invention, the position of the electrode unit in the exterior can be fixed.

  The battery according to the present invention is characterized in that the first fixing portion and the second fixing portion have different lengths for each electrode unit.

  According to the present invention, the position of the electrode unit in the juxtaposition direction can be adjusted according to the length of the first fixing portion and the second fixing portion, and the outer casing and the first fixing portion and the second fixing portion can be easily fixed. It can be carried out.

  According to the present invention, it is possible to prevent displacement of the electrode units arranged in parallel.

3 is a cross-sectional view showing a battery cell according to Embodiment 1. FIG. It is a fragmentary sectional view by the II-II line of FIG. It is an external view which shows an electrode unit. 6 is an external view showing an electrode unit included in a battery according to Embodiment 2. FIG. It is explanatory drawing of fixation of a protrusion piece. 6 is an external view showing an electrode unit provided in a battery according to Embodiment 3. FIG. 6 is an external view showing an electrode unit provided in a battery according to Embodiment 4. FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
(Embodiment 1)
In FIG. 1, reference numeral 100 denotes a cell of a vanadium solid salt battery. The vanadium solid salt battery is configured by housing one or a plurality of cells 100 in a case. The cell 100 includes a bag-shaped outer casing 101, and a positive terminal 102 and a negative terminal 103 protruding from the outer casing 101.

  The cell 100 has a rectangular plate shape inside the exterior 101, and a plurality of (five in FIG. 2) electrode units 1, 2, 3, 4, 5 is accommodated.

  As shown in FIG. 2, in the stacking direction, an electrode unit 2 is disposed on one side of the electrode unit 1 and an electrode unit 3 is disposed on the other side. Further, at both ends in the stacking direction, an electrode unit 4 is disposed on the electrode unit 2 side, and an electrode unit 5 is disposed on the electrode unit 3 side.

  That is, the electrode units 4 and 5 sandwich the electrode units 1, 2 and 3. The exterior 101 has two films 104 and 104 whose peripheral portions are fixed to each other, and the electrode units 4 and 5 are adjacent to the films 104 and 104, respectively.

  The electrode units 1, 4, 5 are configured as negative electrodes, and the electrode units 2, 3 are configured as positive electrodes. Therefore, the electrode units 1, 2, 3, 4, 5 are connected in parallel. In addition, you may comprise so that the electrode units 1, 4, and 5 may comprise a positive electrode, and the electrode units 2 and 3 may comprise a negative electrode.

  The electrode unit 1 includes flat electrode materials 10 and 10 and a flat conductive material 11. The electrode material 10 includes a base material containing an active material containing vanadium ions or ions containing vanadium and an acidic electrolytic solution.

  Coating films 12 and 12 are provided on both surfaces of the conductive material 11. The coating film 12 is conductive and non-permeable to electrolyte, and is formed by, for example, graphite coating. In addition, if it has electroconductivity and electrolyte solution impermeability, it can replace with the coating film 12, and can be set as the structure which uses a conductive film, flat conductive rubber, a graphite sheet, etc. For example, the graphite sheet may be fixed to one surface of the conductive material 11 by a fixing sheet having conductivity.

  The electrode unit 1 further has an electrolyte solution impermeable sealant 13. The sealant 13 has a rectangular frame shape, is provided on the side surface side of the conductive material 11 so as to be in contact with the side surface of the conductive material 11, and sandwiches the conductive material 11 and the coating films 12 and 12. The sealant 13 is fixed to the peripheral edge of the surface of the coating films 12 and 12. Further, the sealant 13 is provided with projecting pieces 16a and 16b configured as described later.

  Both surfaces of the conductive material 11 face the electrode materials 10, 10, and the coating films 12, 12 are provided between the conductive material 11 and the electrode materials 10, 10. The electrode materials 10 and 10 are located inside the sealant 13 on the surfaces of the coating films 12 and 12, respectively.

  The side surface of the electrode material 10 is surrounded by the sealant 13. Note that the side surface of the electrode material 10 may have either a configuration in contact with the sealant 13 or a configuration in which a gap is provided without contacting the sealant 13.

  Furthermore, the electrode unit 1 has diaphragms 14 and 14. The diaphragm 14 is provided on the electrode material 10. The peripheral edge of the diaphragm 14 is fixed to the sealant 13. As a result, the electrode material 10 is entirely covered with the coating film 12, the sealant 13, and the diaphragm 14.

  The electrode unit 2 includes flat electrode materials 20 and 20 and a flat conductive material 21. The electrode material 20 contains a base material containing an active material containing vanadium ions or vanadium ions and an acidic electrolyte.

  The conductive material 21 is provided with coating films 22 and 22 on both sides. Like the coating film 12, the coating film 22 is conductive and non-permeable to electrolyte, and is formed by, for example, graphite coating.

  The electrode unit 2 further has an electrolyte non-permeable sealant 23. The sealant 23 has a rectangular frame shape, and the sealant 23 is provided on the side surface side of the conductive material 21 in contact with the side surface of the conductive material 21 and sandwiches the conductive material 21 and the coating films 22 and 22.

  The sealant 23 is fixed to the peripheral edge portions of the surfaces of the coating films 22 and 22. Further, the sealant 23 is provided with projecting pieces 26a and 26b having a configuration described later.

  Both surfaces of the conductive material 21 face the electrode materials 20 and 20, and the coating films 22 and 22 are provided between the conductive material 21 and the electrode materials 20 and 20. The electrode materials 20 and 20 are located inside the sealant 23 on the surfaces of the coating films 22 and 22, respectively.

  The side surface of the electrode material 20 is surrounded by the sealant 23. Note that the side surface of the electrode material 20 may have either a configuration in contact with the sealant 23 or a configuration in which a gap is provided without contacting the sealant 23.

  The electrode unit 3 includes electrode materials 30 and 30, a conductive material 31, coating films 32 and 32, and a sealant 33 so as to have the same structure as the electrode unit 2. The sealant 33 is provided with projecting sides 36a and 36b having a configuration described later.

  The electrode unit 4 includes a flat electrode material 40 and a flat conductive material 41. The electrode material 40 contains a base material containing an active material containing vanadium ions or ions containing vanadium and an acidic electrolytic solution. The conductive material 41 is provided with coating films 42 and 42 on both sides. Like the coating film 12, the coating film 42 is conductive and non-permeable to electrolyte, and is formed by, for example, graphite coating.

  The electrode unit 4 further has an electrolyte solution impermeable sealant 43. The sealant 43 has a quadrangular frame shape, is provided on the side surface side of the conductive material 41 in contact with the side surface of the conductive material 41, and sandwiches the conductive material 41 and the coating films 42 and 42. The sealant 43 is fixed to the peripheral edge portions of the surfaces of the coating films 42 and 42. Further, the sealant 43 is provided with a projecting piece 46 having a configuration described later.

  Both surfaces of the conductive material 41 are opposed to the electrode material 40, and the coating films 42 and 42 are provided between the conductive material 41 and the electrode material 40. The electrode material 40 is located inside the sealant 43 on the coating film 42.

  The side surface of the electrode material 40 is surrounded by the sealant 43. Note that the side surface of the electrode material 40 may have either a configuration in contact with the sealant 43 or a configuration in which a gap is provided without contacting the sealant 43.

  Furthermore, the electrode unit 4 has a diaphragm 44. The diaphragm 44 is provided on the electrode material 40. The peripheral edge of the diaphragm 44 is fixed to the sealant 43. As a result, the electrode material 40 is entirely covered with the coating film 42, the sealant 43, and the diaphragm 44.

  The electrode unit 5 includes an electrode material 50, a conductive material 51, coating films 52 and 52, a sealant 53, and a diaphragm 54 so as to have the same structure as the electrode unit 4. Further, the sealant 53 is provided with a protruding piece 56 having a configuration described later.

  The electrode units 4 and 5 sandwich the electrode units 1, 2 and 3 so that the diaphragms 44 and 54 face each other, the electrode unit 2 faces the diaphragm 44, and the electrode unit 3 faces the diaphragm 54. It is out.

  FIG. 3 is an external view showing the electrode units 1, 2, 3, 4, and 5. The electrode units 1, 2, 3, 4, 5 have conductive tabs 15, 25, 35, 45, 55, respectively. The tabs 15, 25, 35, 45, and 55 protrude from one side of the sealant 13, 23, 33, 43, and 53, respectively.

  The electrode units 1, 2, 3, 4, and 5 are arranged side by side in the stacking direction with the one side aligned. The tabs 15, 45, and 55 are provided so as to overlap in the stacking direction of the electrode units 1, 2, 3, 4, and 5. The tabs 25 and 35 are provided so as to overlap with each other and not overlap with the tabs 15, 45, and 55 in the stacking direction.

  The tabs 15, 25, 35, 45, and 55 are connected to the conductive materials 11, 21, 31, 41, and 51, respectively. The tabs 15, 45, and 55 are connected to the negative terminal 103, and the tabs 25 and 35 are connected to the positive terminal 102.

  The protruding pieces 16a, 16b, 26a, 26b, 36a, 36b, 46, and 56 are opposite to each other where the tabs 15, 25, 35, 45, and 55 are provided in the sealants 13, 23, 33, 43, and 53, respectively. Is provided. The projecting pieces 16a, 16b, 26a, 26b, 36a, 36b, 46, 56 are respectively formed as a part of the sealant 13, 23, 33, 43, 53 or the sealant 13, 23, 33, 43, 53. Any of the structures which are another members may be sufficient.

  The protruding pieces 16a and 16b of the electrode unit 1 are provided side by side at positions that do not overlap in the stacking direction at the center of one side of the sealant 13 where the tabs 15 are provided.

  Further, the protruding piece 46 is provided on one side of the opposite side of the sealant 43 on which the tab 45 is provided. The protruding piece 56 is provided on the opposite side of one side of the sealant 53 where the tab 55 is provided, on the opposite side of the one side where the protruding piece 46 of the electrode unit 4 is provided.

  The protruding pieces 26a and 26b are provided side by side on the opposite side of the sealant 23 where the tab 25 is provided. The protruding piece 26a is provided so as to overlap the protruding piece 46 in the stacking direction. The protruding piece 26b is provided so as to overlap the protruding piece 16a in the stacking direction.

  The protruding pieces 36a and 36b are provided side by side on the opposite side of the sealant 33 where the tabs 35 are provided. The protruding piece 36a is provided at a position overlapping the protruding piece 16b in the stacking direction. The protruding piece 36b is provided at a position overlapping the protruding piece 56 in the stacking direction.

  As shown in FIG. 2, the protruding pieces 36a, 36b, 26a, 26b are longer than the protruding pieces 16a, 16b, and the protruding pieces 46, 56 are longer than the protruding pieces 36a, 36b, 26a, 26b. Further, the protruding piece 16a and the protruding piece 26b are fixed, and the protruding piece 16b and the protruding piece 36a are fixed. Further, the protruding piece 26a and the protruding piece 46 are fixed, and the protruding piece 36b and the protruding piece 56 are fixed.

  The protruding pieces 16a, 16b, 26a, 26b, 36a, 36b, 46 and 56 are fixed by, for example, heat welding, and are fixed together with the films 104 and 104.

  The cell is formed by the tab 15 of the electrode unit 1, the tab 45 of the electrode unit 4 and the negative terminal 103 connected to the tab 55 of the electrode unit 5, and the positive terminal 102 connected to the tab 25 of the electrode unit 2 and the tab 35 of the electrode unit 3. 100 performs electronic exchange with the outside.

  Hereinafter, the material which comprises the cell 100 which concerns on this invention is explained in full detail. Examples of the base material of the electrode materials 10, 20, 30, 40, and 50 include porous carbon materials such as felt made of carbon fibers, sheets made of carbon fibers, and sheet-like glassy carbon. .

Vanadium ions or ions containing vanadium contained in the active material of the electrode members 20 and 30 of the electrode units 2 and 3 that function as positive electrodes are converted into vanadium whose oxidation number varies between pentavalent and tetravalent by an oxidation-reduction reaction. It is preferable that it is an ion to contain. The ion containing pentavalent and tetravalent vanadium oxidation number changes ^{between, VO 2+ (IV), VO} 2 + (V) are exemplified.

Examples of the vanadium compound that is an active material for the positive electrode include vanadium oxide (IV) (VOSO ₄ · nH ₂ O) and vanadium oxide (V) ((VO ₂ ) ₂ SO ₄ · nH ₂ O). . Mixtures of these may be used. n is 0 or an integer of 1-6.

Vanadium ions or ions containing vanadium contained in the active material of the electrode materials 10, 40, 50 of the electrode units 1, 4, 5 functioning as the negative electrode have an oxidation number between divalent and trivalent by an oxidation-reduction reaction. Vanadium ions that change are preferred. Examples of vanadium ions whose oxidation number varies between divalent and trivalent include V ²⁺ (II) and V ³⁺ (III).

Examples of the vanadium compound that is an active material for the negative electrode include vanadium sulfate (II) (VSO ₄ · nH ₂ O) and vanadium sulfate (III) (V ₂ (SO ₄ ) 3 · nH ₂ O). Mixtures of these can be used. n shows 0 or the integer of 1-6.

  Moreover, it is preferable that the electrolyte solution impregnated in the electrode materials 10, 20, 30, 40 and 50 is a sulfuric acid aqueous solution. As the sulfuric acid aqueous solution, for example, dilute sulfuric acid can be used. The amount of the electrolytic solution is, for example, 70 mL of 2M (mol / L) sulfuric acid with respect to 100 g of the vanadium compound.

Between the electrode members 10, 20, 30, 40, 50 configured as described above, reactions of the following formulas (1) and (2) occur via the diaphragms 14, 44, 54 located between them.
Positive electrode: VOX ₂ · nH ₂ O (s) ⇔VO ₂ X · nH ₂ O (s) + HX + H ⁺ + e ⁻ (1)
Negative electrode: VX ₃ · nH ₂ O (s) + e ⁻ ⇔2VX ₂ · nH ₂ O (s) + X ⁻ (2)
In the formula, X represents a monovalent anion. When X is an m-valent anion, the coupling coefficient (1 / m) is considered. n can take various values.

  The diaphragms 14, 44, and 54 are ion exchange membranes through which, for example, hydrogen ions (protons) or sulfate ions can pass. The conductive materials 11, 21, 31, 41, 51 are preferably made of a metal foil such as aluminum or copper.

  The sealants 13, 23, 33, 43 and 53 are preferably made of polypropylene or polyethylene. Thereby, each of the conductive materials 11, 21, 31, 41 and 51 can be easily sealed by heat welding.

  The charging / discharging of the cell 100 is performed using the reactions of the formulas (1) and (2). At this time, the positive electrode terminal 102 and the negative electrode terminal 103 exchange power with an external load or a charger. In the reaction of the formulas (1) and (2), the diaphragm 54 is formed between the electrode materials 10 and 20 through the diaphragm 14 and between the electrode materials 10 and 30, and between the electrode materials 20 and 40 through the diaphragm 44. Then, protons move between the electrode materials 30 and 50.

  According to said structure, the electrically conductive material 11 does not contact the electrode materials 10 and 10 directly by the coating films 12 and 12. Further, the side surface of the conductive material 11 and the side surface of the electrode material 10 are covered with a sealant 13. Therefore, even if the electrolyte contained in the electrode material oozes out, it does not come into contact with the conductive material, and corrosion of the conductive material 11 is prevented.

  Since the coating films 12 and 12 are conductive, the movement of electrons between the electrode materials 10 and 10 and the conductive material 11 is secured. Similarly, the conductive materials 21, 31, 41, 51 are prevented from being corroded, and movement of electrons is secured.

  Conventionally, the electrode units 1, 2, 3, 4, and 5 are heat-welded together by applying heat from the electrode units 4 and 5 sides at both ends at the portions where the peripheral portions overlap each other in the stacking direction. At this time, heat is not transmitted to the electrode unit 1 located at the center in the stacking direction, and there is a possibility that it cannot be sufficiently fixed. However, according to the above configuration, the electrode units 1, 2, and 3 are fixed at different locations from the electrode units on both sides in the stacking direction. The electrode units 4 and 5 are fixed only to the electrode units 2 and 3, respectively. Therefore, since the cell 100 is fixed for each of the adjacent electrode units, heat is easily transmitted during the heat welding, and the electrode units 1, 2, 3, 4, 5 can be securely fixed. 2, 3, 4, and 5 can be prevented from being displaced.

  Further, since the protruding pieces 16a, 16b, 26a, 26b, 36a, 36b, 46 and 56 protrude from the sealants 13, 23, 33, 43 and 53, respectively, it is easy to perform the fixing work.

  The protruding pieces 16a, 16b, 26a, 26b, 36a, 36b, 46, and 56 are provided on other sides than the sides on which the tabs 15, 25, 35, 45, and 55 protrude. Therefore, when the electrode units 1, 2, 3, 4, 5 are fixed, the tabs 15, 25, 35, 45, and 55 do not get in the way and work is easy. In the above configuration, the protruding pieces 16a, 16b, 26a, 26b, 36a, 36b, 46, 56 are provided on the opposite side of the side where the tabs 15, 25, 35, 45, 55 are provided. However, as long as it is other than the one side, each of the electrode units 1, 2, 3, 4, and 5 may be provided on a side other than the opposite side.

  Since the electrode units 1, 2, 3, 4, 5 are connected to the exterior 101 via the protruding pieces 16a, 16b, 26a, 26b, 36a, 36b, 46, 56, the electrode units 1, 2, 3, It is possible to fix the positions in the exterior 101 of 4,5.

  The protruding pieces 36a, 36b, 26a, 26b are longer than the protruding pieces 16a, 16b, and the protruding pieces 46, 56 are longer than the protruding pieces 36a, 36b, 26a, 26b. Therefore, according to the length of 16a, 16b, 26a, 26b, 36a, 36b, 46, 56, the position of the electrode units 1, 2, 3, 4, 5 in the juxtaposed direction can be adjusted, and easily fixed to the exterior 101 it can.

  The sealants 13, 23, 33, 43, and 53 may be configured not to contact the side surfaces of the conductive materials 11, 21, 31, 41, and 51, respectively. Further, the electrode materials 10, 20, 30, 40, and 50 may be configured to be divided into a plurality of segments. Further, the active material may be iron or chromium instead of vanadium, and the electrolytic solution may be alkaline instead of acidic.

(Embodiment 2)
FIG. 4 is an external view showing electrode units 1, 2, 3, 4, and 5 included in the battery according to Embodiment 2. About the structure of the electrode units 1, 2, 3, 4, 5 with which the battery which concerns on Embodiment 2 is provided, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted. The electrode units 1, 2, 3, 4, and 5 are arranged side by side in the same arrangement as in the first embodiment.

  The electrode unit 1 has a wide protruding piece 16c. The protruding piece 16c is located at the center of one side of the sealant 13 where the tab 15 is provided.

  The electrode unit 2 has a wide protruding piece 26c. The protruding piece 26c is located on one side of the opposite side of the sealant 23 where the tab 25 is provided.

  The electrode unit 3 has a wide protruding piece 36c. The protruding piece 36c is located on the opposite side of one side of the sealant 33 where the tab 35 is provided. Further, the protruding piece 36c is located on the opposite side to the one side where the protruding piece 26c of the electrode unit 2 is located.

  In the above configuration, the protruding pieces 16c, 26c, 36c, 46, and 56 are provided on the opposite side of the side where the tabs 15, 25, 35, 45, and 55 are provided. Each of 2, 3, 4, 5 may be configured to be provided on a side other than the opposite side as long as it is other than the one side.

  FIG. 5 is an explanatory diagram showing how the protruding pieces 16c, 26c, 36c, 46, 56 are fixed. In the stacking direction, a part of the protruding piece 16c overlaps a part of the protruding piece 26c, and the other part overlaps a part of the protruding piece 36c. The protruding piece 26 c overlaps the protruding piece 46 at a portion not overlapping the protruding piece 16 c. The protruding piece 36 c overlaps the protruding piece 56 at a portion that does not overlap the protruding piece 16 c.

  The protruding pieces 16c, 26c, 36c, 46, 56 are fixed at the overlapping portions, whereby the electrode units 1, 2, 3, 4, 5 can be fixed. On the other hand, the protrusion pieces 16c, 26c, 36c, 46, and 56 are not fixed to each other at portions other than the surface where the protrusion pieces 16c, 26c, 36c, 46, and 56 are overlapped and fixed. For example, in the protruding piece 16c, the portion that does not overlap the protruding pieces 26c and 36c is not fixed to the other protruding pieces.

  Since the protruding piece 16c has a part fixed to the protruding piece 26c and another part fixed to the protruding piece 36c, and is formed as one piece, it is easier than providing the protruding pieces 16a and 16b separately. Can be provided. Similarly, the protruding piece 26c and the protruding piece 36c can be provided in a simpler manner than providing the protruding pieces 26a and 26b and the protruding pieces 36a and 36b separately.

(Embodiment 3)
6 is an external view showing electrode units 1, 2, 3, 4, and 5 provided in the battery according to Embodiment 3. FIG. About the structure of the electrode units 1, 2, 3, 4, 5 with which the battery which concerns on Embodiment 3 is provided, about the structure similar to Embodiment 1, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted. The electrode units 1, 2, 3, 4, and 5 are arranged side by side in the same arrangement as in the first embodiment.

  The electrode unit 1 is provided with a protruding piece 16a on one side of the side where the tab 15 is provided, and a protruding piece 16b on the other side other than the one side and the opposite side. In the electrode unit 2, a protruding piece 26 b is provided on a side opposite to the side where the tab 25 is provided, at a position overlapping the protruding piece 16 a in the stacking direction. Further, the electrode unit 2 is provided with a protruding piece 26a on the same side as the other side where the protruding piece 16b of the electrode unit 1 is provided at a position that does not overlap with the protruding piece 16b in the stacking direction. The protruding piece 16a and the protruding piece 26b are fixed.

  The electrode unit 3 is provided with a protruding piece 36b at a position where it does not overlap with the protruding piece 16a on the opposite side of the side where the tab 35 is provided. A protruding piece 36a is provided at a position overlapping the protruding piece 16b in the stacking direction. The protruding pieces 16b and 36a are fixed.

  The protruding piece 46 of the electrode unit 4 is provided at a position overlapping the protruding piece 26a in the stacking direction. Further, the protruding piece 56 of the electrode unit 5 is provided at a position overlapping the protruding piece 36b. The protruding piece 46 and the protruding piece 26a are fixed, and the protruding piece 56 and the protruding piece 36b are fixed.

  According to the above configuration, the protruding piece 16a and the protruding piece 16b, the protruding piece 26a and the protruding piece 26b, and the protruding piece 36a and the protruding piece 36b are provided on two different sides. It is easy to work when 4 and 5 are fixed. Furthermore, the electrode units 1, 2, 3, 4, and 5 are more securely prevented from being displaced.

(Embodiment 4)
FIG. 7 is an external view showing electrode units 1, 2, 3, 4, and 5 included in the battery according to Embodiment 4. About the structure of the electrode units 1, 2, 3, 4, 5 with which the battery which concerns on Embodiment 4 is provided, about the structure similar to Embodiment 1 and Embodiment 3, the same code | symbol is attached | subjected and the detailed Description is omitted. The electrode units 1, 2, 3, 4, and 5 are arranged side by side in the same arrangement as in the first embodiment.

  The electrode units 1, 2, 3, 4, 5 according to the fourth embodiment have the same arrangement as in the third embodiment, and have protruding pieces 16a, 16b, 26a, 26b, 36a, 36b, 46, 56, Each is fixed.

  The electrode unit 1 further includes projecting pieces 16 d and 16 e that project from the sealant 13. The protruding piece 16e is provided at a position where it does not overlap the tab 15 on one side where the tab 15 is provided. The protruding piece 16d is provided on the side opposite to the protruding piece 16b.

  The electrode unit 2 further includes projecting pieces 26 d and 26 e that project from the sealant 23. The protruding piece 26e is provided at a position overlapping the protruding piece 16d in the stacking direction. The protruding piece 16d and the protruding piece 26e are fixed. The protruding piece 26d is provided at a position where it does not overlap the tab 25 on one side where the tab 25 is provided.

  The electrode unit 3 further includes a protruding piece 36d and a protruding piece 36e protruding from the sealant 33. The protruding piece 36d is provided at a position overlapping the protruding piece 16e in the stacking direction. Further, the protruding piece 36d is provided at a position where it does not overlap the tab 35 on one side where the tab 35 is provided. The protruding piece 36d and the protruding piece 16e are fixed. The protruding piece 36e is provided on the opposite side of the protruding piece 36a.

  The electrode unit 4 further has a protruding piece 47 protruding from the sealant 43. The protruding piece 47 is provided at a position overlapping the protruding piece 26d in the stacking direction, and is fixed to the protruding piece 26d. The electrode unit 5 further has a protruding piece 57 protruding from the sealant 53. The protruding piece 57 is provided at a position overlapping the protruding piece 36e in the stacking direction, and is fixed to the protruding piece 36e.

  According to the above configuration, in the electrode unit 1, the protruding pieces 16 a and 16 d fixed to the protruding pieces 26 b and 26 e of the electrode unit 2 are provided on two different sides of the sealant 13. In the electrode unit 1, protruding pieces 16 b and 16 e fixed to the protruding pieces 36 a and 36 d of the electrode unit 3 are provided on two different sides of the sealant 13. Therefore, it is possible to prevent the displacement of the electrode unit 1 more reliably.

  In the electrode unit 2, protruding pieces 26 a and 26 d fixed to the protruding pieces 46 and 47 of the electrode unit 4 are provided on two different sides of the sealant 23. Further, in the electrode unit 2, projecting pieces 26 b and 26 e fixed to the projecting pieces 16 a and 16 d of the electrode unit 1 are provided on two different sides of the sealant 23. Therefore, it is possible to prevent the displacement of the electrode unit 2 more reliably.

  In the electrode unit 3, projecting pieces 36 a and 36 d fixed to the projecting pieces 16 b and 16 e of the electrode unit 1 are provided on two different sides of the sealant 33. In the electrode unit 3, protruding pieces 36 b and 36 e that are fixed to the protruding pieces 56 and 57 of the electrode unit 5 are provided on two different sides of the sealant 33. Therefore, it is possible to prevent the displacement of the electrode unit 3 more reliably.

  Further, the protruding pieces 16 a, 16 b, 16 d and 16 e are provided on each of the four sides of the sealant 33 of the electrode unit 1. The protruding pieces 26 a, 26 b, 26 d, and 26 e are provided on each of the four sides of the sealant 23 of the electrode unit 2. The protruding pieces 36 a, 36 b, 36 d, and 36 e are provided on each of the four sides of the sealant 33 of the electrode unit 3. Therefore, the work of fixing the electrode units 1, 2, 3, 4, 5 can be easily performed.

  In the cells 100 according to the vanadium batteries of the first to fourth embodiments, the electrodes fixed to each other according to the material temperature of the constituent elements of the cell 100 such as the heat temperature during welding or the thickness of the film 104. The number of units may be increased. That is, in the first to fifth embodiments, two adjacent electrode units are fixed by one protruding piece of each electrode unit. However, three or more electrode units are provided for each electrode unit. It is good also as a structure fixed with a protrusion piece.

  For example, in the cell 100 according to the first embodiment, the protruding pieces 16a, 26a, and 36a are provided at overlapping positions in the juxtaposed direction of the electrode units 1, 2, and 3, and may be fixed together. . In this configuration, the protruding piece 26b may be fixed to both the protruding pieces 16b and 36b, or may be fixed to either one. In this configuration, the electrode units 1, 2, and 3 are fixed to each other by the protruding pieces 16a, 26a, and 36a.

  Further, one electrode unit group of the plurality of electrode units in the cell 100 is fixed to each other by one protruding piece of each electrode unit, and the other electrode unit group is fixed to each other by another protruding piece of each electrode unit. It may be a configuration. For example, in the cell 100 of the first embodiment, in the juxtaposed direction of the electrode units 1, 2, 3, 4, and 5, the protruding pieces 16a, 26a, and 46 are provided and fixed at overlapping positions, and the protruding pieces 36b and 56 are fixed. A configuration may be adopted in which each is provided at an overlapping position and fixed. Thereby, the electrode units 1, 2, and 4 which comprise one electrode unit group are mutually fixed, and the electrode units 3 and 5 which comprise the other electrode unit group are mutually fixed.

  In the first to fourth embodiments, the number of electrode units 1, 2, and 3 is not limited, and a plurality of electrode units may be provided. Furthermore, the electrode units 1, 2, 3, 4, 5 and the sealants 13, 23, 33, 43, 53 are not limited to a square shape, and may be a polygonal shape such as a pentagonal shape, a hexagonal shape, a circular shape, or other shapes. Good.

  The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims. That is, embodiments obtained by combining technical means appropriately changed within the scope of the claims are also included in the technical scope of the present invention.

1, 2, 3, 4, 5 Electrode unit 10, 20, 30, 40, 50 Electrode material 11, 21, 31, 41, 51 Conductive material 12, 22, 32, 42, 52 Coating film (coating part)
13, 23, 33, 43, 53 Sealant 14, 44, 54 Diaphragm 16a, 16d, 26a, 26d, 36a, 36d Protruding piece (first fixing part)
16b, 16e, 26b, 26e, 36b, 36e Projection piece (second fixing part)
16c, 26c, 36c Projection piece (first fixing part, second fixing part)
101 Exterior

Claims (8)

It comprises a plurality of electrode units arranged in parallel so that the surfaces are opposed to each other,
The electrode unit has a first fixing portion that protrudes from a part of the peripheral edge and is fixed to the electrode unit on one side in the juxtaposed direction, and a second fixing portion that is fixed to the electrode unit on the other side. Battery characterized. The electrode unit is
A plurality of electrode materials containing an active material and an acidic or alkaline electrolyte;
A conductive material having a flat plate shape and both surfaces facing the first electrode material;
Two covering portions that are conductive and non-permeable to electrolyte solution, are provided between the electrode material and the conductive material, cover the both surfaces of the conductive material, and the electrode material is disposed on the surface;
A sealant that is impermeable to electrolyte, has a frame shape, surrounds the electrode material, is fixed to a peripheral portion of the two covering portions, and seals the conductive material by the covering portions;
Have
The battery according to claim 1, wherein the first fixing portion and the second fixing portion protrude from the sealant. The electrode unit has a rectangular shape,
The battery according to claim 1, wherein the first fixing portion and the second fixing portion are provided on the same side and are integrated. The electrode unit has a rectangular shape,
The battery according to claim 1, wherein the first fixing portion and the second fixing portion are provided on two different sides of the electrode unit. The electrode unit has a rectangular shape,
It has a tab that is a conductive material protruding from a part of the peripheral edge of the electrode unit,
The battery according to any one of claims 1 to 4, wherein the first fixing portion and the second fixing portion are provided on other sides other than the side from which the tab protrudes. The electrode unit has a rectangular shape,
There are a plurality of the first fixing part and the second fixing part,
The first fixing portion is provided on each of two different sides of the electrode unit,
The battery according to claim 1, wherein the second fixing portion is provided on each of two different sides of the electrode unit. An exterior covering the plurality of electrode units;
The battery according to claim 1, wherein each electrode unit is connected to the exterior via a first fixing portion and a second fixing portion.   The battery according to claim 7, wherein the first fixing portion and the second fixing portion have different lengths for each electrode unit.

Images