JP2010067422A - Battery and battery pack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a configuration of a laminate type battery, which facilitates fixing or positioning, and which improves workability. <P>SOLUTION: A unit battery 1 includes a first and a second sheath materials 14a, 14b made of flexible films arranged so as to pinch both sides of an element cell 11 in order to house the element cell 11, fixing portion forming members 15, 16 wherein fixing portions 15a, 16b are used in order to fix the unit battery 1 to other members, and a heat welding part 141 in which peripheral edge parts of the first and second sheath materials 14a, 14b are heat welded, while being arranged so that part of the fixing portion forming members 15, 16 is interposed between the first and the second sheath materials 14a, 14b, in at least part of surroundings of the first and second sheath materials 14a, 14b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a battery and an assembled battery such as a lithium ion secondary battery, a lithium secondary battery, and a polymer secondary battery, and more specifically, a battery and an assembled battery including an exterior body made of a flexible film that accommodates a unit cell. It relates to batteries. In this specification and claims, not only so-called batteries such as lithium ion secondary batteries, lithium secondary batteries, polymer secondary batteries, but also “electric storage devices” including electric double layer capacitors are collectively referred to. It is called “battery”.

  2. Description of the Related Art Conventionally, for example, batteries such as lithium ion secondary batteries have been increasingly demanded for downsizing, weight reduction, thickness reduction, shape freedom, and the like with the expansion of various applications.

  Therefore, in order to meet such demands, a laminate film having a multilayer structure has been conventionally used to form a flexible exterior body that accommodates a unit cell. The laminate film is composed of an inner surface layer facing the unit cell (battery element), an intermediate layer, and an outer surface layer facing the outside. The inner surface layer is made of, for example, a thermoplastic resin excellent in electrolytic solution resistance and heat sealability, such as polyethylene and polypropylene. An intermediate | middle layer consists of metal foil excellent in flexibility and intensity | strength, such as aluminum foil, for example. An outer surface layer consists of insulating resin excellent in electrical insulation, such as a polyamide-type resin, for example.

  A structure of a battery (hereinafter referred to as a laminate type battery) in which a unit cell is housed in an exterior body made of such a laminate film is disclosed in, for example, Japanese Patent Application Laid-Open No. 2007-173223 (hereinafter referred to as Patent Document 1). ing.

  FIG. 20 is a perspective view showing a laminate type battery disclosed in Patent Document 1. As shown in FIG.

  As shown in FIG. 20A, in the unit battery 100 as an example of the lithium ion secondary battery, the unit cell is a synthetic resin film or a laminated film of a synthetic resin film and an aluminum foil, for example, polypropylene / aluminum. / Covered with a flexible exterior material 102 made of polyamide resin. One surface of the flexible exterior material 102 is formed by embossing or the like to form a unit cell housing portion 103, and the other surface on the opposite side forms a planar member 104 to cover the unit cell. . The positive electrode terminal 105 and the negative electrode terminal 106 are drawn out from a portion where the peripheral portions of the storage portion 103 and the planar member 104 are heat-sealed and sealed. Laminating surfaces 107 and 108 that are relatively wide are formed on the outer surfaces of the storage unit 103 and the planar member 104 so as to be stacked on other adjacent unit cells 100.

  As shown in FIG. 20B, in a unit battery of another example, both surfaces of a flexible exterior material 102 are formed by embossing or the like to constitute a unit cell storage portion 103. The positive electrode terminal 105 and the negative electrode terminal 106 are drawn out from a portion where the outer peripheral edge portion of the storage portion 103 is thermally welded and sealed.

  In the unit battery 100 shown in FIG. 20, the positive electrode terminal 105 and the negative electrode terminal 106 are drawn out from the same side of the flexible exterior member 102 that is sealed, but may be drawn out from the opposite sides. .

  FIG. 21 is a perspective view showing one example of the battery stack disclosed in Patent Document 1. As shown in FIG.

  As shown in FIG. 21, the battery stack 1000 is configured by stacking eight unit batteries 100 shown in FIG. Specifically, the battery stack 1000 includes four unit batteries 100-1, 100-2, 100-3, 100 such that the stacked surfaces 107 and 108 (FIG. 20A) are substantially parallel to each other. -4 are stacked and the temperature fuse mounting body 2000 is arranged, and thereafter, four unit cells 100-5, 100-6, 100-7, and 100-8 are similarly stacked. The positive and negative terminals of the eight unit batteries 100-1 to 100-8 are connected in series, and the negative terminal 111 at the end is a common terminal 112 common to both charging and discharging, and the positive terminal at the end. A temperature fuse connection lead wire 115 is connected to a discharge terminal 114 connected to the discharge circuit 113. The temperature fuse connecting lead 115 is coupled to a temperature fuse provided inside the temperature fuse mounting body 2000. A charging circuit connecting lead wire 116 is taken out of the temperature fuse and connected to a charging terminal 117 for supplying a charging current during charging.

Although not shown in FIG. 21, in the battery stack 1000 as an example of a conventional assembled battery, the eight unit cells 100-1 to 100-8 are stacked between the adjacent stacked surfaces 107 and 108. The positions of the eight unit cells 100-1 to 100-8 are fixed by arranging chemical fixing means such as an adhesive and a double-sided adhesive tape.
JP 2007-173223 A

  However, the following problems may occur in the conventional laminated battery.

  First, when a battery stack is configured as an example of an assembled battery by combining unit batteries as disclosed in Patent Document 1, in order to fix a plurality of laminate-type batteries to each other, or a plurality of laminate-type batteries In order to fix the battery in a predetermined housing, it is necessary to arrange a chemical fixing means such as an adhesive or a double-sided adhesive tape on the surface of the exterior body. This is because the outer body is made of a flexible film, and the outer peripheral surface and the thermally welded peripheral portion are relatively low in mechanical strength, so that the outer peripheral surface and the peripheral portion are not in contact with other components. This is because it is necessary to arrange a plurality of laminated batteries. Also, since the mechanical strength of the outer peripheral surface and peripheral edge of the outer package is relatively low, physical fixing means such as screws, bolts, rivets, etc. are directly provided on the outer package to position and fix multiple laminated batteries to each other. Can not do it.

  Next, when positioning and fixing a conventional laminate type battery alone to other components, the mechanical strength of the outer peripheral surface and the peripheral portion of the outer casing is relatively low, so that physical properties such as screws, bolts, rivets, etc. Therefore, it is impossible to position the laminated battery with respect to other components by directly providing a fixing means on the exterior body. Moreover, since the mechanical strength of the outer peripheral surface and the peripheral portion of the outer package is relatively low, it is easily damaged when stress occurs in the outer package, and it is difficult to handle the laminated battery as it is, A conventional laminate type battery has a problem that workability is poor.

  Accordingly, an object of the present invention is to provide a laminate type battery that can be fixed or positioned easily and can improve workability.

  The battery according to the present invention includes an exterior material made of a flexible film disposed so as to sandwich both sides of the unit cell in order to accommodate the unit cell, and a fixing used to fix the battery to another member. In a state where the fixed portion forming member in which the portion is formed and at least a part of the periphery of the exterior material are arranged so that a part of the fixed location forming member is interposed between the exterior materials, the peripheral portion of the exterior material is A heat-welded portion that is heat-welded.

  In the battery of the present invention, at the heat welded portion where the outer periphery of the exterior material is thermally welded, at least part of the periphery of the exterior material, a part of the fixing point forming member is interposed between the exterior materials. Since it is disposed, a fixing location forming member for attaching a physical fixing member such as a screw, a bolt, or a rivet can be integrated with the exterior material. Thereby, since a fixing location can be given to an exterior material, it is possible to easily fix or position a single or a plurality of laminated batteries without using a chemical fixing means such as an adhesive or an adhesive tape. And workability can be improved. Moreover, since the fixing location forming member is fixed to the exterior material, the laminated battery can be easily fixed or positioned by attaching the fixing member to the fixing location forming member. Furthermore, since the fixed location forming member is independent from the exterior material that houses the unit cells, the shape of the fixed location forming member can be arbitrarily changed, and the degree of freedom of the structure for fixing or positioning is increased. Furthermore, since the fixed location forming member is independent of the outer package that houses the unit cell, even if stress is generated on the fixed location forming member, the unit cell is less damaged. In addition, since the fixed location forming member is fixed to the exterior material in the process of heat welding the exterior material, a separate heating process is not required to apply the fixed location forming member to the battery. The influence of deterioration or the like can be reduced. Since the fixed location forming member acts as a reinforcing material for the exterior material, the mechanical strength of the battery can be increased.

  In the battery according to the present invention, the fixing portion forming member is preferably a plate-like member disposed in the unit cell. In this case, the plate-like member may be one plate-like member arranged on one side or one side of the unit cell, or may be two plate-like members arranged on both sides or two adjacent sides of the unit cell, Three or more plate-like members arranged on three sides of the unit cell may be used.

  By comprising in this way, a fixing location formation member can be easily fixed and arranged to a unit cell.

  In the battery of the present invention, the fixed location forming member is preferably a plate-like member having a through hole into which the unit cell is inserted and a peripheral edge formed so as to surround the through hole.

  By comprising in this way, a fixing | fixed location formation member can be fixed and arrange | positioned so that it may integrate with a unit cell.

  In this case, it is preferable that the fixing location forming member has a crossing portion that crosses the through hole.

  By comprising in this way, the intensity | strength of the fixing location formation member which has a through-hole can be improved.

  Furthermore, in this case, it is preferable that a notch is formed as a fixed portion in the peripheral portion of the fixed portion forming member.

  By comprising in this way, a battery can be fixed or positioned by inserting a part of other member into a notch, without separately using physical fixing members, such as a screw, a volt | bolt, and a rivet.

  In the battery according to the present invention, the fixing portion forming member includes a plate-like portion having a through-hole into which the unit cell is inserted and a peripheral portion formed so as to surround the through-hole, and at least an outer periphery of the plate-like portion. Including a part of the frame-shaped part, the plate-shaped part of the fixed-point forming member is arranged so as to be interposed between the exterior materials, and the fixed part is formed in the frame-shaped part of the fixed-point forming member It is preferable.

  By comprising in this way, a some battery can be easily connected and fixed by aligning the frame-shaped part of a fixing location formation member.

  In this case, it is preferable that a plurality of through holes are formed in the peripheral edge portion of the plate-like portion of the fixed portion forming member.

  By comprising in this way, since the area | region which an exterior material contacts directly in a heat welding part can be increased through a some through-hole, the sealing performance of an exterior material can be improved.

  In this case, the battery of the present invention further includes a positive electrode connection terminal and a negative electrode connection terminal that are electrically connected to the positive electrode and the negative electrode of the unit cell and extend from the exterior material, respectively. It is preferable that both of the terminals extend from one side surface of the unit cell, and the frame-shaped portion of the fixing portion forming member is formed to extend along the other side surface intersecting with one side surface of the unit cell.

  Thus, the frame-shaped portion of the fixed portion forming member is formed along the side surface intersecting the side surface of the battery on the side where the positive electrode connecting terminal and the negative electrode connecting terminal protrude and extend. For this reason, when connecting and fixing a plurality of batteries by aligning the frame-shaped parts of the fixing point forming member, the positive electrode connecting terminal and the negative electrode connecting terminal aligned on one side surface are easily and electrically connected to each other. can do.

  In the battery of the present invention, in the length along the peripheral direction of the exterior material, the length of the fixing point forming member that divides the heat welding portion is the heat sandwiched between the fixing point forming member portions that divide the heat welding portion. It is preferable that the length is shorter than the length of the welded portion.

  In the battery according to the present invention, a part of the fixing portion forming member is interposed between the exterior materials, so that the area where the exterior material is in direct contact with the heat welded portion is reduced, but the area where the heat welded portion is divided is relatively By reducing the size, the rate of reduction of the area in direct contact with the exterior material can be kept small. Thereby, it can prevent that the sealing performance of an exterior material falls by interposition of a fixing location formation member.

  In this case, it is preferable that a plurality of through holes are formed in the portion of the fixing location forming member that divides the heat welded portion.

  By comprising in this way, since the area | region which an exterior material contacts directly in a heat welding part can be increased through a some through-hole, the sealing performance of an exterior material can be improved.

  In the battery according to the present invention, it is preferable that a through hole is formed in the fixing portion of the fixing portion forming member.

  By comprising in this way, a battery can be fixed or positioned by using physical fixing members, such as a screw, a volt | bolt, and a rivet.

  The assembled battery according to the present invention includes a plurality of batteries having at least one of the above-described characteristics, and a plurality of batteries are connected by attaching a fixing member to a fixing portion.

  In the assembled battery of the present invention, each battery can be handled as a single battery that can be fixed or positioned using a physical fixing member in a form in which each battery is sealed and held with an exterior material. A plurality of batteries can be handled separately in the battery. As a result, it is possible to easily remove and replace only the defective battery or only the deteriorated battery in the assembled battery, so that an assembled battery with excellent maintainability can be obtained. In addition, since extra members such as cushioning materials are not incorporated into the assembled battery case, the space utilization efficiency can be improved, and a plurality of batteries can be accommodated in the case exactly by attaching a fixing member to the fixed location. can do. Furthermore, since mutual fixation between the individual batteries and mutual electrical connection of the electrode connecting members can be performed collectively, the number of work steps in manufacturing the assembled battery can be reduced.

  As described above, according to the present invention, it is possible to easily fix or position the laminated battery, and it is possible to improve workability.

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

(Embodiment 1)
1 is an exploded perspective view showing a battery according to a first embodiment of the present invention, FIG. 2 is a perspective view showing a battery according to a first embodiment of the present invention, and FIG. 3 is taken along III-III in FIG. It is sectional drawing seen from the direction.

  As shown in FIGS. 1 to 3, the unit cell 1 includes a unit cell (battery element) 11, a positive electrode connection terminal 12 and a negative electrode connection terminal 13 that are electrically connected to the positive electrode and the negative electrode of the unit cell 11, respectively. The first exterior material 14a and the second exterior material 14b disposed on the upper side and the lower side of the unit cell 11, and the fixing location forming members 15 and 16 disposed on the left side and the right side of the unit cell 11, respectively.

  The first exterior material 14 a and the second exterior material 14 b are made of a flexible film disposed so as to sandwich the upper side and the lower side of the unit cell 11 in order to accommodate the unit cell 11. A flexible film is comprised from the inner surface layer which faces the unit cell 11, an intermediate | middle layer, and the outer surface layer which faces the exterior. The inner surface layer is made of, for example, a thermoplastic resin excellent in electrolytic solution resistance and heat sealability, such as polyethylene and polypropylene. An intermediate | middle layer consists of metal foil excellent in flexibility and intensity | strength, such as aluminum foil, for example. An outer surface layer consists of insulating resin excellent in electrical insulation, such as a polyamide-type resin, for example. The first exterior material 14 a and the second exterior material 14 b are accommodated so as to sandwich the unit cell 11, and the inner surface layers are thermally welded to form the exterior body 14, and heat is generated at the peripheral portion of the exterior body 14. A welded portion 141 is formed.

  The unit cell 11 includes a positive electrode current collector, a positive electrode active material applied to the positive electrode current collector, a negative electrode current collector, a negative electrode active material applied to the negative electrode current collector, and a solid electrolyte. The positive electrode connection terminal 12 and the negative electrode connection terminal 13 are electrically connected to the positive electrode and the negative electrode of the unit cell 11, respectively, and extend from the exterior body 14. Moreover, the positive electrode connection terminal 12 and the negative electrode connection terminal 13 are drawn out from the location of the heat welding part 141 in which the outer peripheral edge part of the exterior body 14 was heat-welded and sealed. In this embodiment, the positive electrode connection terminal 12 and the negative electrode connection terminal 13 are disposed so as to protrude from opposite side portions of the exterior body 14.

  The fixed location forming members 15 and 16 are two strip-shaped plate-like members arranged on the left side and the right side of the unit cell 11. The fixed portion forming members 15 and 16 are formed with fixed portions 15a and 16a. For example, a rod-shaped member as a positioning member, a through hole for inserting a rivet as a fixing member, a screw or a bolt as a fixing member The screw hole for inserting etc. is formed. The fixing locations 15a and 16a are used for fixing the unit battery 1 to other constituent members. Therefore, the fixing location forming members 15 and 16 in which the fixing locations 15a and 16a are formed are functional members used for positioning and fixing the unit battery 1 which is a laminate type battery. In this embodiment, the fixed location forming member is two plate-like members arranged on both sides of the unit cell 11, but may be one plate-like member arranged on one side or one side of the unit cell 11. Two plate-like members arranged on both sides of the unit cell 11 or two adjacent sides may be used, or three or more plate-like members arranged on the three sides of the unit cell 11 may be used. Further, in this embodiment, the fixed location forming member is two strip-shaped plate members disposed on both sides of the unit cell 11, but the shape of the plate-shaped member is not limited to the strip shape, Various shapes can be employed.

  As shown in FIG. 2 and FIG. 3, a part of the fixing portion forming members 15 and 16 is formed in a part 141a around the first exterior member 14a and a part 141b around the second exterior member 14b. The peripheral portions of the first and second exterior members 14a and 14b are thermally welded in a state where they are disposed so as to be interposed between the first and second exterior members 14a and 14b. Is formed.

  As a material of the fixing location forming members 15 and 16, any of synthetic resin, metal, and ceramic material may be used. When polypropylene is used as the material for the inner surface layers of the first and second exterior materials 14a and 14b, it is preferable to use polycarbonate in view of the ease of thermal welding to the inner surface layers. In this case, each of the constituent members shown in FIG. 1 is left as an example in an atmosphere heated to 120 to 200 ° C. for about 3 seconds, whereby the fixing portion forming members 15 and 16 and the first and second exteriors are formed. The materials 14a and 14b are integrated by heat welding.

  FIG. 4 is a perspective view showing Embodiment 1 of the assembled battery configured by combining a plurality of unit batteries shown in FIGS. 1 to 3.

  As shown in FIG. 4, in each of the fixing locations 15 a and 16 a (FIG. 2) of the fixing location forming members 15 and 16 of the individual unit cells, in this example, the through-hole has a rod-shaped member as a positioning member or a fixing member. 21 is inserted, and spacers 22 are arranged as spacing members between the adjacent fixing point forming members 15 and 15 and 16 and 16. Thus, for example, the assembled battery 2 that can be positioned and fixed in the housing is configured on the component member.

  In summary, in the unit battery 1 configured as described above, the first and second exteriors are formed by the heat-welded portion 141 where the peripheral portions of the first and second exterior members 14a and 14b are thermally welded. Since the fixed portion forming members 15 and 16 are disposed so as to be interposed between the first and second exterior materials 14a and 14b at least at a part of the periphery of the materials 14a and 14b. The fixing portion forming members 15 and 16 for attaching a physical fixing member such as a rivet can be integrated with the exterior body 14. As a result, the fixing points 15a and 16a can be applied to the exterior body 14, so that it is easy to fix or position a single or a plurality of laminated batteries without using a chemical fixing means such as an adhesive or an adhesive tape. The workability can be improved. Moreover, since the fixing location forming members 15 and 16 are fixed to the exterior body 14, the laminated battery can be easily fixed or positioned by attaching the fixing members to the fixing location forming members 15 and 16. Furthermore, since the fixing location forming members 15 and 16 are independent from the exterior body 14 that houses the unit cell 11, the shape of the fixing location forming members 15 and 16 can be arbitrarily changed, and can be fixed or positioned. The degree of freedom of structure is increased. Furthermore, since the fixing location forming members 15 and 16 are independent from the exterior body 14 that accommodates the unit cell 11, even if stress is generated in the fixing location forming members 15 and 16, damage to the unit cell 11 is caused. Few. In addition, since the fixing location forming members 15 and 16 are fixed to the exterior body 14 in the process of thermally welding the exterior body 14, a separate heating process is required to apply the fixing location forming members 15 and 16 to the unit battery 1. Since it is not necessary, the influence of deterioration or the like given to the unit cell 11 can be reduced. Since the fixing location forming members 15 and 16 act as a reinforcing material for the exterior body 14, the mechanical strength of the unit battery 1 can be increased.

  As shown in FIG. 1, the fixing location forming members 15, 16 are two strip-shaped plate-like members arranged on both sides of the unit cell 11, so that the fixing location forming members 15, 16 can be easily fixed and arranged.

  Further, as shown in FIG. 2, a physical fixing member such as a screw, a bolt, or a rivet is used by forming through holes in the fixing portions 15 a and 16 a of the fixing portion forming members 15 and 16. Thus, the unit battery 1 can be fixed or positioned.

  Furthermore, as shown in FIG. 4, the assembled battery 2 includes a plurality of unit cells 1, and a plurality of unit cells 1 are attached by attaching a rod-shaped member 21, which is an example of a positioning member or a fixing member, to the fixing locations 15 a and 16 a. Concatenated. In this way, each unit battery 1 can be handled as a single battery that can be fixed or positioned using a physical fixing member in a form in which each unit battery 1 is sealed and held by the exterior body 14. A plurality of unit batteries 1 can be handled separately in the battery 2. As a result, it is possible to easily remove and replace only the defective battery or only the deteriorated battery in the assembled battery 2, so that the assembled battery 2 having excellent maintainability can be obtained. . Moreover, since an extra member such as a cushioning material is not incorporated in the casing of the assembled battery 2, the space utilization efficiency can be improved, and a plurality of members can be fitted in the casing by attaching the fixing members to the fixing points 15a and 16a. The unit battery 1 can be accommodated. Furthermore, since the mutual fixation between the individual batteries and the electrical connection of the electrode connecting members can be performed collectively, the number of work steps in manufacturing the assembled battery 2 can be reduced.

  FIG. 5 is a partial plan view showing another form of the fixing point forming member used in Embodiment 1 of the battery of the present invention.

  In FIG. 1, the fixing portion forming members 15 and 16 made of strip-shaped plate members are shown. However, as shown in FIG. 5A, the exterior body 14 (first and second exterior members 14 a and 14 b) ( In the length along the circumferential direction in FIGS. 1 and 2, the length W of the fixing portion forming member 16 that divides the thermal welding portion 141 is sandwiched between the fixing portion forming member 16 that divides the thermal welding portion 141. It is preferable that the length of the heat welded portion 141 is shorter. In FIG. 5A, in order to show such a length relationship, the fixed portion forming member 16 having a substantially U-shaped planar shape is shown. However, the fixed portion forming member 16 is limited to the above-described planar shape. It is not something.

  In Embodiment 1 of the battery according to the present invention, a part of the fixing portion forming members 15 and 16 is interposed between the first and second exterior members 14a and 14b, so that the first and second heat welding portions 141 and Although the area where the second exterior materials 14a and 14b are in direct contact with each other is reduced, the first and second areas can be reduced by relatively reducing the area where the heat welded portion 141 is divided as shown in FIG. The rate of reduction of the area where the exterior materials 14a and 14b are in direct contact with each other can be kept small. Thereby, it can prevent that the sealing performance of the 1st and 2nd exterior materials 14a and 14b falls by interposition of the fixing location formation members 15 and 16. FIG.

  In this case, as shown in FIG. 5B, it is preferable that a plurality of through-holes 161 are formed in the portion of the fixing portion forming member 16 that divides the heat welding portion 141.

  By comprising in this way, the area | region where the 1st and 2nd exterior materials 14a and 14b contact directly in the heat welding part 141 can be increased through the some through-hole 161, Therefore The 1st and 2nd exterior The sealing performance of the materials 14a and 14b can be improved.

(Embodiment 2)
FIG. 6 is an exploded perspective view (A) showing an exploded laminate type battery applicable to Embodiment 2 of the battery of the present invention, and a perspective view showing a fixing portion forming member used in Embodiment 2 of the present invention. (B).

  As shown in FIG. 6A, the unit cell 11, the positive electrode connection terminal 12, the negative electrode connection terminal (13: not shown), the exterior body 14, and the first and second exterior materials 14a and 14b are shown in FIG. It is the same as shown.

  As shown in FIG. 6B, the fixing location forming member 17 is a plate-like member having a through hole 173 into which the unit cell 11 is inserted and a peripheral edge portion 171 formed so as to surround the through hole 173. . A crossing portion 172 that crosses the through hole 173 is formed in the fixing location forming member 17. The crossing part 172 is formed to have elasticity. The material of the fixing part forming member 17 is the same as that of the fixing part forming members 15 and 16 of the first embodiment.

  FIG. 7 is a schematic plan view showing Embodiment 2 of the battery of the present invention. In addition, in FIG. 7, illustration of the heat welding part 141 of the exterior body 14 is abbreviate | omitted.

  One fixing portion forming member 17 is interposed between the unit cell 11 and the first exterior member 14a shown in FIG. 6, and another sheet is fixed between the unit cell 11 and the second exterior member 14b. The constituent members are arranged so that the location forming member 17 is interposed. In this case, the entire unit cell 11 is disposed so as to be inserted into the region of the through hole 173, and the transverse portion 172 is elastically deformed so as to support the center portion of the unit cell 11. In this state, the peripheral portions of the first and second exterior members 14a and 14b are thermally welded to form a thermally welded portion (not shown), and the two fixing point forming members 17 and 17 and the first The first and second exterior members 14a and 14b are integrated by heat welding. In this case, as shown in FIG. 7, the peripheral portion 171 of the fixed portion forming member 17 is disposed so as to be exposed to the outside of the first and second exterior members 14 a and 14 b. In this way, as shown in FIG. 7, the unit battery 3 that can be handled as a single form is configured as the second embodiment of the present invention.

  FIG. 8 is a perspective view showing Embodiment 2 of an assembled battery configured by combining a plurality of unit batteries shown in FIG.

  As shown in FIG. 8, the corners of the fixing point forming member 17 of each unit battery serve as fixing points. In this example, each unit cell is positioned and fixed by inserting the corner portion into a notch 24 formed in the rod-shaped member 23 as a positioning member or a fixing member. Thus, for example, the assembled battery 4 that can be positioned and fixed in the housing is configured as the component member.

  In summary, in the unit battery 3 configured as described above, the fixing portion forming member 17 includes a through hole 173 into which the unit cell 11 is inserted and a peripheral edge portion 171 formed so as to surround the through hole 173. By using the plate member, the fixing portion forming member 17 can be fixedly disposed so as to be integrated with the unit cell 11.

  In this case, the fixing portion forming member 17 can improve the strength of the fixing portion forming member 17 having the through hole 173 by having the crossing portion 172 that crosses the through hole 173. Further, the crossing part 172 can support a part of the unit cell 11.

  Furthermore, by inserting a part of the fixing portion forming member 17, for example, a corner portion, into the notch 24 of the rod-like member 23 as the fixing member, the individual unit batteries 3 can be positioned and fixed. By configuring in this way, the unit battery 3 can be obtained by inserting a part of the fixing portion forming member 17 into the notch 24 of the fixing member without separately using a physical fixing member such as a screw, a bolt, and a rivet. Can be fixed or positioned.

  Other operational effects of the unit battery 3 of the second embodiment are the same as those of the unit battery 1 of the first embodiment described above.

(Embodiment 3)
FIG. 9 is an exploded perspective view (A) showing an exploded laminate type battery applicable to Embodiment 3 of the battery of the present invention, and a perspective view showing a fixing portion forming member used in Embodiment 3 of the present invention. (B).

  As shown in FIG. 9A, the unit cell 11, the positive electrode connection terminal 12, the negative electrode connection terminal (13: not shown), the exterior body 14, and the first and second exterior materials 14a and 14b are shown in FIG. It is the same as shown.

  As shown in FIG. 9B, the fixed portion forming member 18 is a plate-like member having a through hole 183 into which the unit cell 11 is inserted and a peripheral edge 181 formed so as to surround the through hole 183. . A crossing portion 182 that crosses the through hole 183 is formed in the fixing location forming member 18. The crossing part 182 is formed to have elasticity. A plurality of notches 184 are formed as fixed locations at both ends of the fixed location forming member 18. The material of the fixing part forming member 18 is the same as that of the fixing part forming members 15 and 16 of the first embodiment.

  FIG. 10 is a schematic plan view showing Embodiment 3 of the battery of the present invention. In addition, in FIG. 10, illustration of the heat welding part 141 of the exterior body 14 is abbreviate | omitted.

  One fixing location forming member 18 is interposed between the unit cell 11 and the first exterior member 14a shown in FIG. 9, and another sheet is fixed between the unit cell 11 and the second exterior member 14b. The constituent members are arranged so that the location forming member 18 is interposed. In this case, the entire unit cell 11 is disposed so as to be inserted into the region of the through hole 183, and the transverse portion 182 is elastically deformed so as to support the central portion of the unit cell 11. In this state, the peripheral portions of the first and second exterior members 14a and 14b are thermally welded to form a thermally welded portion (not shown), and the two fixing point forming members 18 and 18 and the first The first and second exterior members 14a and 14b are integrated by heat welding. In this case, as shown in FIG. 10, it arrange | positions so that a part of peripheral part 181 in which the notch 184 of the fixed location formation member 18 was formed may be exposed to the outer side of the 1st and 2nd exterior materials 14a and 14b. Has been. In this way, as shown in FIG. 10, the unit battery 5 that can be handled as a single form is configured as the third embodiment of the present invention.

  FIG. 11 is a perspective view showing Embodiment 3 of an assembled battery configured by combining a plurality of unit batteries shown in FIG.

  As shown in FIG. 11, a plurality of notches 184 formed in the fixing location forming member 18 of each unit cell serve as fixing locations. In this example, each unit cell is positioned and fixed by inserting a part of the rod-shaped member 25 into the notch 184 as a positioning member or a fixing member. In this way, for example, the assembled battery 6 that can be positioned and fixed in the housing is configured as the constituent member.

  In summary, in the unit battery 6 configured as described above, the fixing portion forming member 18 includes a through hole 183 into which the unit cell 11 is inserted and a peripheral portion 181 formed so as to surround the through hole 183. By being a plate-shaped member, the fixing portion forming member 18 can be fixedly disposed so as to be integrated with the unit cell 11.

  In this case, the fixing point forming member 18 can improve the strength of the fixing point forming member 18 having the through hole 183 by having the crossing part 182 that crosses the through hole 183. Further, the crossing part 182 can support a part of the unit cell 11.

  Furthermore, each unit battery 5 can be positioned and fixed by inserting a part of the rod-shaped member 25 as a fixing member into the notch 184 of the fixing location forming member 18. With this configuration, the unit battery 5 is inserted by inserting a part of the fixing member into the notch 184 of the fixing portion forming member 18 without using a separate physical fixing member such as a screw, bolt, or rivet. Can be fixed or positioned. Since the notch 184 is formed as a fixing portion in the peripheral portion of the fixing portion forming member 18 as described above, one of other members can be used without using a physical fixing member such as a screw, a bolt, or a rivet. The unit battery 5 can be fixed or positioned by inserting the part into the notch.

  Other operational effects of the unit battery 5 of the third embodiment are the same as those of the unit battery 1 of the first embodiment described above.

(Embodiment 4)
FIG. 12 is an exploded perspective view (A) showing an exploded laminate battery applicable to Embodiment 4 of the battery of the present invention, and a perspective view showing a fixing portion forming member used in Embodiment 4 of the present invention. (B).

  As shown in FIG. 12A, the unit cell 11, the positive electrode connection terminal 12, the negative electrode connection terminal (13: not shown), the exterior body 14, and the first and second exterior materials 14a and 14b are shown in FIG. It is the same as shown.

  As shown in FIG. 12 (B), the fixing location forming member 19 includes a plate-like portion having a through hole 193 into which the unit cell 11 is inserted, and a peripheral portion 191 formed so as to surround the through hole 193. At least a part of the outer periphery of the plate-like portion is composed of two frame-like portions 192 formed on both sides of the plate-like portion in this example. A fixed portion 194 is formed in the frame-shaped portion 192 of the fixed portion forming member 19, and for example, a rod-shaped member as a positioning member, a through hole for inserting a rivet as a fixing member, a screw as a fixing member, A screw hole for inserting a bolt or the like is formed. The fixing portion 194 is used for fixing the battery to another constituent member. Therefore, the fixing part forming member 19 in which the fixing part 194 is formed is a functional member used for positioning and fixing the unit battery which is a laminate type battery. The material of the fixing point forming member 19 is the same as that of the fixing point forming members 15 and 16 of the first embodiment.

  FIG. 13 is a schematic perspective view showing Embodiment 4 of the battery of the present invention. In addition, in FIG. 13, illustration of the heat welding part 141 of the exterior body 14 is abbreviate | omitted.

  A plate-like portion of one fixed location forming member 19 is interposed between the first exterior member 14a and the second exterior member 14b shown in FIG. 12, and the entire unit cell 11 is within the region of the through hole 193. Each constituent member is arranged so as to be inserted into the container. In this state, the peripheral portions of the first and second exterior members 14a and 14b are heat-welded to form a heat-welded portion (not shown), and the fixed portion forming member 19 and the first and second members The exterior materials 14a and 14b are integrated by heat welding. In this case, as shown in FIG. 13, a part of the peripheral edge portion 191 of the fixing location forming member 19 is disposed so as to be exposed outside the first and second exterior members 14a and 14b. Further, as shown in FIG. 13, the frame-like portions 192 in which the fixing places 194 are formed are disposed on both sides outside the first and second exterior members 14a and 14b. Thus, unit battery 7 which can be handled as a single form as Embodiment 4 of the present invention is constituted.

  FIG. 14 is a perspective view showing Embodiment 4 of an assembled battery configured by combining a plurality of unit batteries shown in FIG.

  As shown in FIG. 14, a plurality of fixing points 194 formed on the fixing point forming member 19 of each unit cell 7 are aligned. Each unit cell is positioned and fixed to these fixing points 194 by fixing a rod-like connecting member or the like as a positioning member or a fixing member with a rivet or a bolt. Thus, for example, the assembled battery 8 that can be positioned and fixed in the housing is formed on the component member.

  In summary, in the unit battery 7 configured as described above, the fixing portion forming member 19 includes a through hole 193 into which the unit cell 11 is inserted and a peripheral portion 191 formed so as to surround the through hole 193. And a frame-like portion 192 formed on at least a part of the outer periphery of the plate-like portion, and the plate-like portion of the fixing portion forming member 19 is between the first and second exterior members 14a and 14b. Since the fixed portion 194 is formed on the frame-shaped portion 192 of the fixed-point forming member 19, the plurality of unit batteries 7 are aligned by aligning the frame-shaped portion 192 of the fixed-point forming member 19. Can be easily connected and fixed.

  Other operational effects of the unit battery 7 of the fourth embodiment are the same as those of the unit battery 1 of the first embodiment described above.

(Embodiment 5)
FIG. 15 is an exploded perspective view (A) showing an exploded laminate battery applicable to Embodiment 5 of the battery of the present invention, and a perspective view showing a fixing portion forming member used in Embodiment 5 of the present invention. (B).

  As shown in FIG. 15A, the exterior body 14, and the first and second exterior materials 14a and 14b are the same as those shown in FIG. However, as shown in FIG. 15A, in the fifth embodiment, the positive electrode connection terminal 12 and the negative electrode connection terminal 13 protrude from the same side of the unit cell 11 or the outer package 14.

  As shown in FIG. 15B, the fixing location forming member 20 includes a through hole 203 into which the unit cell 11 is inserted, a plate-like portion having a peripheral edge 201 formed so as to surround the through hole 203, and At least a part of the outer periphery of the plate-like portion is composed of two frame-like portions 202 formed on both sides of the plate-like portion in this example. A fixed portion 204 is formed in the frame-shaped portion 202 of the fixed portion forming member 20, for example, a rod-shaped member as a positioning member, a through-hole for inserting a rivet as a fixing member, a screw as a fixing member, A screw hole for inserting a bolt or the like is formed. The fixing portion 204 is used for fixing the battery to another constituent member. Therefore, the fixed location forming member 20 in which the fixed location 204 is formed is a functional member used for positioning and fixing the unit battery which is a laminate type battery. The material of the fixing point forming member 20 is the same as that of the fixing point forming members 15 and 16 of the first embodiment.

  FIG. 16 is a schematic perspective view showing Embodiment 5 of the battery of the present invention. In addition, in FIG. 16, illustration of the heat welding part 141 of the exterior body 14 is abbreviate | omitted.

  A plate-like portion of the single fixing portion forming member 20 is interposed between the first exterior member 14 a and the second exterior member 14 b shown in FIG. 15 so that the entire unit cell 11 is within the region of the through hole 203. Each constituent member is arranged so as to be inserted into the container. In this state, the peripheral portions of the first and second exterior members 14a and 14b are heat-welded, so that a heat-welded portion (not shown) is formed, and the fixed portion forming member 20, the first and second members are formed. The exterior materials 14a and 14b are integrated by heat welding. In this case, as shown in FIG. 16, the peripheral portion 201 of the fixed portion forming member 20 is disposed so as to be exposed to the outside of the first and second exterior members 14a and 14b. Further, as shown in FIG. 16, the frame-like portions 202 in which the fixing portions 204 are formed are arranged on both sides outside the first and second exterior materials 14a and 14b. Thus, unit battery 9 which can be handled as a single form as Embodiment 5 of the present invention is constituted.

  FIG. 17 is a perspective view showing Embodiment 5 of an assembled battery configured by combining a plurality of unit batteries shown in FIG.

  As shown in FIG. 17, a plurality of fixing points 204 (not shown) formed on the fixing point forming member 20 of each unit cell 9 are aligned. By fixing the rod-shaped member 26 as a positioning member or a fixing member to the fixing portions 204 by a fixing member 27 such as a rivet or a bolt, the individual unit batteries 9 are positioned and fixed. Further, the rod-shaped member 26 is fixed by a connecting member 28. Further, the positive electrode connection terminal 12 and the negative electrode connection terminal 13 are alternately connected by inter-terminal connection bus bars 31, and charge / discharge terminal members 29 and 30 are connected to terminals located at both ends. Thus, for example, the assembled battery 10 that can be positioned and fixed in the housing is configured as the constituent member.

  The unit battery 9 configured as described above can achieve the same effect as the unit battery 7 of the fourth embodiment described above, and when a plurality of unit batteries 9 are combined, the positive electrode connection terminal 12 and the negative electrode The side part of the unit battery 9 in which the connection terminals 13 are arranged intersects with the side part of the unit battery 9 in which the frame-like part 202 of the fixed portion forming member 20 is arranged. Therefore, in the assembled battery 10, it is suitable to arrange | position the wiring connected to a positive / negative electrode connection terminal for charging / discharging, and the structural member for positioning and fixing of a battery within a housing | casing.

  In other words, in the unit cell 9 according to the fifth embodiment, both the positive electrode connection terminal 12 and the negative electrode connection terminal 13 protrude from one side surface of the unit cell 11, and the frame-shaped portion 202 of the fixed portion forming member 20 is The unit cell 11 is formed so as to extend along the other side surface intersecting with the one side surface. Thus, since the frame-shaped part 202 of the fixed location forming member 20 is formed along the side surface intersecting the side surface of the battery on the side where the positive electrode connection terminal 12 and the negative electrode connection terminal 13 protrude and extend, the fixed location forming member When a plurality of batteries are connected and fixed by aligning the 20 frame-shaped portions 202, the positive electrode connection terminal 12 and the negative electrode connection terminal 13 aligned on one side surface can be easily electrically connected to each other. it can.

  18 and 19 are schematic plan views showing Embodiment 5 of the battery of the present invention shown in FIG. 18 and FIG. 19, the heat welding part 141 of the exterior body 14 is shown.

  As shown in FIG. 18, the entire unit cell 11 is disposed so as to be inserted into the through hole 203 of the fixing point forming member 20, and the heat welded portion 141 indicated by the hatched portion The fixing portion forming member 20 formed so as to surround is disposed in a region of the peripheral portion 201 which is a part of the plate-like portion.

  On the other hand, as shown in FIG. 19, the entire unit cell 11 is disposed so as to be inserted into the through hole 203 of the fixing location forming member 20, and the heat welded portion 141 indicated by the hatched portion is The fixed portion forming member 20 formed so as to surround the through-hole 20 is disposed in the region of the peripheral portion 201 which is a part of the plate-like portion, and the peripheral portion 201 is spaced from each other as an example. A plurality of substantially rectangular through holes 203a are formed.

  As shown in FIG. 19, by forming a plurality of through holes 203 a in the peripheral edge portion 201 of the plate-like portion of the fixed location forming member 20, the first and second exterior members 14 a and 14 b are directly connected to each other at the heat welded portion 141. Since the contact area can be increased through the plurality of through holes 203a, the sealing performance of the first and second exterior members 14a and 14b can be improved.

  In the various embodiments of the battery of the present invention described above, a plurality of exterior materials such as the first and second exterior materials 14a and 14b are used as the exterior material, but a single exterior material is used. For example, the single exterior material may be bent so that the upper and lower sides of the unit cell 11 are sandwiched so as to accommodate the unit cell 11.

  It should be considered that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is shown not by the above embodiments but by the scope of the claims, and is intended to include all modifications and variations within the meaning and scope equivalent to the scope of the claims.

  The battery of the present invention is applied not only to a power storage battery for power plants and homes as a backup power source, but also to a laminated battery used as a power source battery for vehicles such as automobiles, motorcycles, trains and carts. And is particularly suitable for laminated batteries with severe vibration.

It is a disassembled perspective view which decomposes | disassembles and shows Embodiment 1 of the battery of this invention. It is a perspective view which shows Embodiment 1 of the battery of this invention. It is sectional drawing seen from the direction along III-III of FIG. It is a perspective view which shows Embodiment 1 of the assembled battery comprised by combining multiple unit batteries shown by FIGS. 1-3. It is a fragmentary top view which shows another form of the fixing location formation member used for Embodiment 1 of the battery of this invention. The exploded perspective view (A) which decomposes | disassembles and shows the laminate type battery applicable to Embodiment 2 of the battery of this invention, and the perspective view (B) which shows the fixing | fixed location formation member used for Embodiment 2 of this invention It is. It is a schematic top view which shows Embodiment 2 of the battery of this invention. It is a perspective view which shows Embodiment 2 of the assembled battery comprised by combining multiple unit batteries shown by FIG. The exploded perspective view (A) which decomposes | disassembles and shows the laminate type battery applicable to Embodiment 3 of the battery of this invention, and the perspective view (B) which shows the fixing | fixed location formation member used for Embodiment 3 of this invention It is. It is a schematic top view which shows Embodiment 3 of the battery of this invention. It is a perspective view which shows Embodiment 3 of the assembled battery comprised by combining multiple unit batteries shown by FIG. The exploded perspective view (A) which decomposes | disassembles and shows the laminate type battery applicable to Embodiment 4 of the battery of this invention, and the perspective view (B) which shows the fixing | fixed location formation member used for Embodiment 4 of this invention It is. It is a schematic perspective view which shows Embodiment 4 of the battery of this invention. It is a perspective view which shows Embodiment 4 of the assembled battery comprised by combining multiple unit batteries shown by FIG. The exploded perspective view (A) which decomposes | disassembles and shows the laminate type battery applicable to Embodiment 5 of the battery of this invention, and the perspective view (B) which shows the fixed location formation member used for Embodiment 5 of this invention It is. It is a schematic perspective view which shows Embodiment 5 of the battery of this invention. It is a perspective view which shows Embodiment 5 of the assembled battery comprised by combining multiple unit batteries shown by FIG. FIG. 17 is a schematic plan view showing Embodiment 5 of the battery of the present invention shown in FIG. 16. FIG. 17 is a schematic plan view showing a modification of Embodiment 5 of the battery of the present invention shown in FIG. 16. It is a perspective view which shows the conventional laminate type battery. It is a perspective view which shows one example of the conventional battery laminated body.

Explanation of symbols

1,3,5,7,9: unit cell, 2,4,6,8,10: assembled battery, 11: unit cell, 12: positive electrode connection terminal, 13: negative electrode connection terminal, 14: exterior body, 14a: 1st exterior material, 14b: 2nd exterior material, 141: Thermal welding part, 15, 16, 17, 18, 19, 20: Fixed location formation member, 15a, 16a, 194, 204: Fixed location, 171, 181, 191, 201: peripheral part, 172, 182: transverse part, 161, 173, 183, 193, 203, 203 a: through hole, 192, 202: frame-like part, 24, 184: notch, 21, 23 25, 26: rod-shaped members.

Claims (12)

An exterior material made of a flexible film disposed so as to sandwich both sides of the unit cell in order to accommodate the unit cell;
A fixing part forming member in which a fixing part used for fixing the battery to another member is formed;
A heat-welded portion in which a peripheral portion of the exterior material is thermally welded in a state where a part of the fixing location forming member is interposed between the exterior materials at least at a part of the periphery of the exterior material When,
With a battery.   The battery according to claim 1, wherein the fixed location forming member is a plate-like member disposed in the unit cell.   2. The battery according to claim 1, wherein the fixed location forming member is a plate-like member having a through hole into which the unit cell is inserted and a peripheral portion formed so as to surround the through hole.   The battery according to claim 3, wherein the fixing location forming member has a crossing portion that crosses the through hole.   5. The battery according to claim 3, wherein a notch is formed as a fixing portion in a peripheral portion of the fixing portion forming member.   The fixed location forming member is formed on a plate-like portion having a through-hole into which the unit cell is inserted and a peripheral portion formed so as to surround the through-hole, and at least a part of the outer periphery of the plate-like portion. The fixed portion forming member is disposed so that the plate-like portion is interposed between the exterior materials, and the fixed portion is formed in the fixed portion forming member. The battery according to claim 1.   The battery according to claim 6, wherein a plurality of through holes are formed in a peripheral edge portion of the plate-like portion of the fixed location forming member. A positive electrode connecting terminal and a negative electrode connecting terminal that are electrically connected to each of the positive electrode and the negative electrode of the unit cell and extend from the exterior material;
Both the positive electrode connecting terminal and the negative electrode connecting terminal extend from one side surface of the unit cell, and the frame-shaped portion of the fixing portion forming member extends along the other side surface intersecting with one side surface of the unit cell. The battery according to claim 6 or 7, wherein the battery is formed.   In the length along the peripheral direction of the exterior material, the length of the fixing location forming member that divides the heat welding portion is the heat sandwiched between the portions of the fixing location forming member that divide the thermal welding portion. The battery according to any one of claims 1 to 8, wherein the battery is shorter than a length of the welded portion.   The battery according to claim 9, wherein a plurality of through holes are formed in a portion of the fixing portion forming member that divides the heat welding portion.   The battery according to any one of claims 1 to 10, wherein a through-hole is formed at a fixing location of the fixing location forming member. An assembled battery comprising a plurality of the batteries according to any one of claims 1 to 11, wherein the plurality of batteries are connected by attaching a fixing member to the fixing portion.

Images