JP5810960B2 - Power storage device container, power storage device, power storage device module, vehicle, and method of manufacturing power storage device - Google Patents

Description

  The present invention relates to a container for a power storage device that houses an electrode body, a power storage device including a container for a power storage device, a power storage device module in which power storage devices are arranged in parallel, a vehicle, and a method for manufacturing the power storage device.

  Conventionally, as a secondary battery which is a kind of power storage device, for example, a lithium ion secondary battery or a nickel-hydrogen secondary battery is well known. For example, in a lithium ion secondary battery, a positive electrode sheet in which an active material layer is formed on the surface of a thin metal plate and an electrode body in which a negative electrode sheet forms a layer are accommodated in a container (case) and extended from an edge of the electrode body. The current collecting part formed and the external terminal projecting outside the container are electrically connected by a current collecting member (for example, Patent Document 1).

  In Patent Document 1, the container body is formed in a flat rectangular shape that opens in a flat plane, and the electrode body is inserted together with the pressure plate from the opening of the container body along the stacking direction of the electrode sheets in the electrode body. Yes. And in patent document 1, a cover member is assembled | attached to a container main body, and the opening part is sealed by joining (fixing) by laser welding. At this time, in Patent Document 1, the positive electrode sheet and the negative electrode sheet are brought into close contact with each other through the separator by pressing the electrode body in the stacking direction of the electrode body by the lid member, and the separation distance between the electrode sheets is not good. The deterioration of the battery performance due to the uniformity is suppressed.

Japanese Patent Laid-Open No. 11-185820

  By the way, in the electrode body mentioned above, since the layered structure is formed by laminating or winding the positive electrode sheet and the negative electrode sheet with the separator interposed therebetween, the length of the electrode body in the laminating direction is increased. The thickness (thickness) varies.

  However, in patent document 1, the structure which fixes in the state which made the cover member contact | abut with respect to the front end surface of the wall part which makes the opening part of a container main body is employ | adopted. For this reason, when the pressure of the electrode body by the lid member is insufficient as the thickness of the electrode body varies, the non-uniformity of the separation distance between the electrode sheets may not be eliminated. Moreover, when the pressurization of the electrode body by the lid member is excessive, there is a possibility that impregnation of the electrolyte solution between the electrode sheets is hindered. In these cases, there is a concern that the electric capacity as the power storage device may be reduced.

  The present invention has been made paying attention to the problems existing in the above-described prior art, and its purpose is to provide a container for a power storage device, a power storage device, a power storage device module, a vehicle, and a vehicle capable of suppressing a reduction in electric capacity. The object is to provide a method for manufacturing a power storage device.

In order to solve the above problems, the invention according to claim 1, the positive electrode sheet and negative electrode sheet having an active material layer formed on the surface of the sheet metal, the thickness in the state sandwiched between the sheet-like separator of a power storage device container for housing the electrode body are laminated alternately in a direction forming a layered container body includes a body member which houses the electrode body have a opening, said main body member from said opening And a lid member that seals the opening of the main body member and forms an accommodation space between the main body member, the main body member and the lid member are made of a metal material, and the lid member Is formed smaller than the opening on the outer peripheral end surface in a direction orthogonal to the insertion direction with respect to the main body member, and in a state where the electrode body is accommodated in the accommodation space, the stacking direction of the electrode bodies is the same as the insertion direction. I will Cage, wherein the body member, opposite to the lid member across the housing space, the first pressing surface that presses the one end surface of both end surfaces located in the stacking direction in the electrode body is formed On the other hand, the lid member is formed with a second pressing surface that faces the body member across the housing space and presses the other end surface of the both end surfaces, and the opening of the body member The step is formed over the entire circumference of the opening, and the outer peripheral end surface of the lid member is arranged inside the opening of the main body member in a direction orthogonal to the insertion direction. It is joined and fixed mutually with the inner peripheral surface of the step part of the main body member , and the depth along the stacking direction of the electrode body in the step part is in the insertion direction of the lid member. The second pressing surface and the front Contact with the other end face of the electrode body, it is set to and the length of said second pressing surface and the step portion does not contact the gist of Rukoto.

According to this, the electrode body is accommodated in the accommodation space formed between the main body member and the lid member in a state where the stacking direction of the electrode bodies and the insertion direction of the lid member with respect to the main body member are matched. . The first pressing surface formed on the main body member presses one end surface of both end surfaces in the stacking direction of the electrode body, while the second pressing surface formed on the lid member presses the other end surface. The insertion amount of the lid member with respect to the main body member is adjusted so as to be in the state, and the lid member can be mutually fixed with the main body member in the adjusted state. In particular, the outer peripheral edge surface of the lid member is fixed by being bonded to each other and the inner peripheral surface of the stepped portion of the body member in a state of being positioned inside the opening of the body member in the direction orthogonal to the insertion direction relative to the body member Yes. For this reason, even when variations occur in the length (thickness) in the stacking direction of the electrode body, the electrode body is reliably pressed by the first pressing surface of the main body member and the second pressing surface of the lid member , The separation distance between each electrode sheet which comprises an electrode body can be equalized suitably. Therefore, it can suppress that an electrical capacity falls.

Invention according to claim 2, in the energy storage device for container according to claim 1, at least one of said body member and said lid member is heat exchange to facilitate heat exchange between the container body and the heat medium The gist is that the part is formed.

According to this, the heat exchange between the heat medium is promoted by the heat exchange part formed on at least one of the main body member and the lid member, thereby adjusting the temperature (cooling and heating) of the electrode body accommodated in the accommodation space. ) Can be facilitated.

According to a third aspect of the invention, in the energy storage device for container according to claim 2, wherein the heat exchanger is summarized in that the a projecting portion which is protruded from the container body. According to this, heat exchange with the heat medium can be promoted with a simple configuration.

According to a fourth aspect of the present invention, in the power storage device container according to any one of the first to third aspects, the outer surface of the main body member continuously extends along the stacking direction of the electrode body. The gist is that the convex portion is formed.

  According to this, by forming the convex part continuously extending along the stacking direction of the electrode body on the outer surface of the main body member, the strength at the part of the main body member in which the convex part is formed is improved. Can do. Therefore, for example, when the internal pressure of the power storage device container is increased, deformation of the main body member can be suppressed.

The invention according to claim 5, in the energy storage device for container according to any one of claims 1 to 4, before Symbol electrode body, the insulating portion interposed between the container body and the electrode body The gist is that the container is housed in the housing space in an insulated state. According to this, the container main body and electrode body which consist of metal materials can be reliably insulated by the insulation part interposed between an electrode body and a container main body.

The invention according to claim 6 is a layered structure in which a positive electrode sheet and a negative electrode sheet in which an active material layer is formed on the surface of a thin metal plate are alternately laminated in the thickness direction with a sheet-like separator interposed therebetween. A power storage device including a container for a power storage device that houses an electrode body that forms the above structure, wherein the power storage device container is the power storage device container according to any one of claims 1 to 5 .

  According to this, the separation distance between each electrode sheet which comprises an electrode body can be equalize | homogenized, and it can suppress that an electrical capacitance falls. Thereby, the electric energy which can be utilized by one full charge as an electrical storage apparatus can be improved.

The gist of the invention described in claim 7 is that, in the power storage device module, a plurality of power storage devices according to claim 6 are arranged in parallel along the stacking direction of the electrode body.
According to this, the separation distance between the electrode sheets constituting the electrode body is made uniform, and it is possible to suppress a decrease in the electric capacity of each power storage device constituting the power storage device module. Thereby, the electric energy which can be utilized by one full charge can be improved.

The invention according to claim 8 is the power storage device module according to claim 7 , wherein the plurality of power storage devices are fixed to each other by surrounding members surrounding the plurality of power storage devices.

  According to this, the plurality of power storage devices forming the power storage device module are fixed to each other by being surrounded by the surrounding members. Therefore, for example, it can be suppressed that the power storage devices move away from each other due to vibration or the like.

The gist of the invention according to claim 9 is that the power storage device according to claim 6 is mounted in a vehicle. According to this, the electric energy which can be utilized by one full charge can be improved by suppressing that an electrical capacity falls as an electrical storage apparatus. For this reason, it can suppress that a charge cycle becomes short as a vehicle.

The invention according to claim 1 0, in the vehicle, and summarized in that mounted power storage device module according to claim 7 or 8.
According to this, the electric energy which can be utilized by one full charge can be improved by suppressing that an electrical capacity falls as each electrical storage apparatus which comprises an electrical storage apparatus module. For this reason, it can suppress that a charge cycle becomes short as a vehicle.

The invention of claim 1 1, the positive electrode sheet and negative electrode sheet having an active material layer formed on the surface of the sheet metal, are alternately laminated in the thickness direction while sandwiched between the sheet-like separator A method of manufacturing a power storage device that houses a layered electrode body, wherein an outer peripheral end surface in a direction orthogonal to an insertion direction with respect to the main body member is formed smaller than the opening from an opening formed in the main body member. the housing space by inserting the cover member to said body member is formed by sealing the opening of the main body member by the cover member, the electrode body is matched with the said insertion direction and stacking direction of the electrode assembly One end surface of the both end surfaces positioned in the stacking direction of the electrode body is pressed by a first pressing surface that is formed on the main body member and faces the lid member with the housing space interposed therebetween. On the other hand The other end face of the both end faces is pressed by a second pressing face that is formed in the lid member and faces the main body member with the accommodation space interposed therebetween, and the outer peripheral end face of the lid member is inserted. in the direction orthogonal to the direction, the state which is disposed inside the opening in the body member, said the outer peripheral edge surface of the lid member, the body stepped portion formed over the entire circumference of the opening in the opening of the member inner and peripheral surfaces joined to each other so as to fix the depth along the stacking direction of the electrode body in the stepped portion, in the insertion direction of the lid member, the second pressing surface of the lid member And the other end surface of the electrode body are in contact with each other, and the length is set such that the second pressing surface and the stepped portion do not contact each other.

According to this, the electrode body is accommodated in the accommodating space formed between the main body member and the lid member in a state where the stacking direction of the electrode bodies and the insertion direction of the lid member with respect to the main body member are matched. The first pressing surface formed on the main body member presses one end surface of both end surfaces in the stacking direction of the electrode body, while the second pressing surface formed on the lid member presses the other end surface. The insertion amount of the lid member with respect to the main body member is adjusted so as to be in a state, and the lid member is fixed to the main body member in the adjusted state. In particular, the outer peripheral edge surface of the lid member is fixed by being bonded to each other and the inner peripheral surface of the stepped portion of the body member in a state of being positioned inside the opening of the body member in the direction orthogonal to the insertion direction relative to the body member . For this reason, even when variations occur in the length (thickness) in the stacking direction of the electrode body, the electrode body is reliably pressed by the first pressing surface of the main body member and the second pressing surface of the lid member , The separation distance between each electrode sheet which comprises an electrode body can be equalized suitably. Therefore, it can suppress that an electrical capacity falls.

  According to the present invention, it is possible to suppress a decrease in electric capacity.

The perspective view which shows a secondary battery and a secondary battery module typically. The perspective view which shows typically the decomposed | disassembled secondary battery. The AA sectional view taken on the line of the secondary battery shown in FIG. The perspective view which shows typically the decomposed | disassembled electrode body. The BB sectional view taken on the line of the secondary battery shown in FIG. The perspective view which shows typically the secondary battery in another embodiment. The perspective view which shows typically the decomposed | disassembled electrode body in another embodiment. Sectional drawing which shows typically the secondary battery and secondary battery module in another embodiment. (A) And (b) is sectional drawing which shows typically the secondary battery in another embodiment.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, a secondary battery 10 as a power storage device mounted on a vehicle (for example, an industrial vehicle or a passenger vehicle) includes a case 11 as a container body that has a flat and substantially rectangular parallelepiped shape as a whole. In the following description, the longitudinal direction of the case 11 indicated by the arrow Y1 is indicated as the left-right direction, the height direction of the case 11 indicated by the arrow Y2 is indicated as the vertical direction, and the short direction of the case 11 indicated by the arrow Y3 in FIG. This is indicated as the front-rear direction.

  As shown in FIG. 2, the case 11 is formed in a rectangular shape (rectangular) in a front view, and a wall portion 12 a that extends in a right-angle direction from each of the four edge portions surrounding the wall portion 12 a. A main body member 12 is provided as a first member which is composed of four wall portions 12b and has a flat square box shape which opens as a whole at the opening portion 12c. The main body member 12 is made of a metal material (for example, stainless steel or aluminum).

  The case 11 includes a lid member 13 which is assembled to the main body member 12 and is formed in a rectangular (rectangular) flat plate shape in a front view for sealing (sealing) the opening 12 c of the main body member 12. The lid member 13 is made of a metal material (for example, stainless steel or aluminum). The entire lid member 13 is formed slightly smaller than the opening 12c of the main body member 12 on the outer peripheral end surface 13a in the vertical and horizontal directions, and the main body extends from the opening 12c of the main body member 12 along the front-rear direction. It is inserted into the member 12 and assembled.

  As shown in FIG. 3, the outer peripheral end surface 13a of the lid member 13 is joined to the inner peripheral surface 12d of the main body member 12 (opening 12c) by welding (for example, laser welding). The lid member 13 is fixed so as not to move in the insertion direction of the main body member 12. In the present embodiment, an accommodation space Sa is formed between the main body member 12 and the lid member 13. Moreover, in this embodiment, the extending direction (front-back direction) of each wall part 12b becomes an insertion direction of the cover member 13, and the cover member 13 becomes a 2nd member. Here, the opening 12c is a portion of the main body member 12 to which the lid member 13 is fixed. In the present embodiment, the entire lid member 13 forms an insertion portion that is inserted into the main body member 12.

  Then, as shown in FIG. 2, the positive electrode sheet 21 and the negative electrode sheet 22 are placed in the accommodation space Sa formed in the case 11 with the sheet-like separator 23 interposed therebetween (intervened state). A layered (layered structure) electrode body 25 is accommodated (contained). The electrode body 25 has a rectangular parallelepiped shape (substantially rectangular parallelepiped shape) that is flat in the vertical direction and the horizontal direction as a whole. In FIG. 2, only the main body member 12, the lid member 13, and the electrode body 25 are illustrated for convenience of explanation, and illustration of the other members is omitted.

  Moreover, as shown in FIG. 3, the electrode body 25 is accommodated in the case 11 in a state where it is accommodated (covered) in an insulating bag 11a as an inner container made of an insulating material. The insulating bag 11a of this embodiment is formed from a thin (flexible) insulating sheet. That is, the insulating bag 11a is interposed between the main body member 12 and the lid member 13 and the electrode body 25 and functions as an insulating portion.

  As shown in FIG. 4, the positive electrode sheet 21 and the negative electrode sheet 22 include a metal foil 26 as a thin metal plate (metal sheet) having a rectangular (rectangular) sheet shape. The metal foil 26 is formed of a metal corresponding to the type of the secondary battery 10 such as a lithium ion secondary battery or a nickel hydride secondary battery. The metal used for the metal foil 26 is different between the positive electrode sheet 21 and the negative electrode sheet 22. The metal foil 26 of the positive electrode sheet 21 is made of, for example, aluminum, while the metal foil 26 of the negative electrode sheet 22 is made of, for example, copper.

  On both surfaces (front surface and rear surface) of each metal foil 26, there is an uncoated region 26b as an uncoated portion set with a constant width from the upper edge portion 26a which is one side of each metal foil 26 over the entire width in the left-right direction. Except for this, an active material is applied to the entire surface, and an active material layer 27 is formed. That is, the non-application area 26 b extends along the upper edge portion 26 a of the metal foil 26. Note that an active material corresponding to the type of the secondary battery 10 is applied to the metal foil 26. The active material applied to the metal foil 26 is different between the positive electrode sheet 21 and the negative electrode sheet 22.

  By punching the non-coating region 26b on the left side of the upper edge portion 26a of each positive electrode sheet 21 in the left-right direction, a square (substantially square) positive electrode lead 21a is formed to extend upward. Has been. In addition, by punching the non-application area 26b on the right side of the center in the left-right direction at the upper edge portion 26a of each negative electrode sheet 22, the negative electrode lead 22a having a square shape (substantially square shape) extends upward. Has been formed. For this reason, the active material layer 27 is not formed on the surfaces of the positive electrode lead 21a and the negative electrode lead 22a. The separator 23 is made of an insulating resin material and is a rectangular porous sheet having an extremely fine pore structure.

  The electrode body 25 is formed by laminating the positive electrode sheet 21 and the negative electrode sheet 22 in the front-rear direction (thickness direction) with the separator 23 sandwiched between the positive electrode sheet 21 and the negative electrode sheet 22. ing. Specifically, in the electrode body 25, the positive electrode sheets 21 and the negative electrode sheets 22 are alternately arranged in the order of... → positive electrode sheet 21.fwdarw.negative electrode sheet 22.fwdarw.positive electrode sheet 21.

  As a result, as shown in FIG. 2, in the upper edge portion of the electrode body 25, on the left side of the center in the left-right direction, the positive electrode current collector portion (layered in a state where the positive electrode lead 21 a does not sandwich the separator 23 therebetween) A positive electrode lead group) 28 is formed extending upward. Further, on the right side of the upper edge portion of the electrode body 25 on the right side from the center in the left-right direction, a negative electrode current collector (negative electrode lead group) 29 is formed in a layered state with the negative electrode lead 22a sandwiching the separator 23 therebetween. It is extended and formed. That is, the positive electrode current collector 28 and the negative electrode current collector 29 are arranged in the extending direction (left-right direction) in a state of being separated from each other along the extending direction of the non-application region 26 b at the upper edge of the electrode body 25. Is formed at the center (substantially the center).

  In the present embodiment, the horizontal direction indicated by the arrow Y1 and the vertical direction indicated by Y2 are the surface directions of the positive electrode sheet 21, the negative electrode sheet 22, and the separator 23. Further, the front-rear direction indicated by the arrow Y3 is the stacking direction of the electrode bodies 25 (the positive electrode sheet 21 and the negative electrode sheet 22) (the direction orthogonal to the plane direction of the layered structure).

  The electrode body 25 is in a state in which the stacking direction of the electrode body 25 is aligned with the insertion direction (vertical direction) of the lid member 13, that is, the positive electrode sheet 21, the negative electrode sheet 22, and the electrode body 25. It is accommodated in the accommodation space Sa in a state where the direction orthogonal to the surface direction of the separator 23 and the insertion direction (vertical direction) of the lid member 13 are matched. In the present embodiment, the front-rear direction indicated by the arrow Y <b> 3 is the insertion direction of the electrode body 25 with respect to the main body member 12. And the insertion direction of the electrode body 25 with respect to the main body member 12 and the insertion direction of the cover member 13 are mutually corresponded.

  As shown in FIG. 3, the electrode body 25 is sandwiched between the wall portion 12 a of the main body member 12 and the lid member 13 in the insertion direction of the lid member 13 and is pressed (applied) in the state of being accommodated in the accommodation space Sa. Pressure). More specifically, in the electrode body 25, the rear surface 25 b as one end face formed on the wall 12 a side of the main body member 12 among the both end faces positioned in the insertion direction of the lid member 13 is the main body member 12. In the wall portion 12a, the inner surface 12e facing the lid member 13 across the accommodation space Sa is in surface contact with the insulating bag 11a sandwiched therebetween and pressed.

  On the other hand, in the electrode body 25, the front surface 25 a as the other end surface formed on the lid member 13 side among the both end surfaces positioned in the insertion direction of the lid member 13 is a wall portion with the accommodation space Sa sandwiched in the lid member 13. 12a (main body member 12) and the inner side surface 13b opposite to the insulating bag 11a are in surface contact with each other and pressed.

  For this reason, the separation distance between the inner side surface 12e and the inner side surface 13b is a distance obtained by adding the length (thickness) of the electrode body 25 in the front-rear direction and the thickness of the insulating bag 11a disposed before and after the electrode body 25. Is consistent with. That is, no clearance (gap) is provided between the wall 12 a of the main body member 12, the insulating bag 11 a, the electrode body 25, and the lid member 13. In the present embodiment, the inner side surface 12e of the wall portion 12a of the main body member 12 serves as a first pressing surface, and the inner side surface 13b of the lid member 13 serves as a second pressing surface. As described above, in this embodiment, the electrode body 25 is accommodated in the case 11 to form the power storage device container 14.

  As shown in FIG. 2, the wall 12 b of the wall 12 b of the main body member 12 is disposed on the wall 12 b that is disposed to face the tips of the positive electrode current collector 28 and the negative electrode current collector 29. Electrode holes 30a and 31a penetrating in the thickness direction are formed. As shown in FIG. 5, each of the electrode holes 30 a and 31 a has a substantially columnar shape, and a positive electrode terminal 30 and a negative electrode terminal 31 formed from a metal material are assembled thereto. The positive electrode terminal 30 and the negative electrode terminal 31 have a substantially cylindrical shape made of an insulating material, and are insulated from the main body member 12 (case 11) by an insulating member 32 inserted between the wall portion 12b. Further, in the positive electrode terminal 30 and the negative electrode terminal 31, a screw portion 33a is formed on the tip end side protruding from the case 11 (main body member 12), and a nut 33b is screwed to the screw portion 33a. It has been entered.

  The positive electrode current collector 28 (positive electrode lead 21a) has one end (front end) of a positive electrode current collector terminal 34 having a rectangular flat plate shape extending along the upper edge portion 26a of the positive electrode sheet 21 and the negative electrode sheet 22. Bonded and electrically connected. Further, the other end (base end) of the positive electrode current collecting terminal 34 is connected to and electrically connected to the base end side projecting into the housing space Sa of the case 11 at the positive electrode terminal 30.

  Similarly, the negative electrode current collector 29 (negative electrode lead 22a) is one end (tip) of a negative electrode current collector terminal 35 having a rectangular flat plate shape extending along the upper edge portion 26a of the positive electrode sheet 21 and the negative electrode sheet 22. And are electrically connected. The other end (base end) of the negative electrode current collecting terminal 35 is connected to and electrically connected to the base end side of the negative electrode terminal 31 protruding into the housing space Sa of the case 11. The case 11 is filled with an electrolyte (electrolyte) according to the type of the secondary battery 10 such as a lithium ion secondary battery or a nickel hydride secondary battery.

  In addition, in the wall portion 12 b where the positive electrode terminal 30 and the negative electrode terminal 31 are formed, the internal pressure of the case 11 (power storage device container 14) is predetermined between the positive electrode terminal 30 and the negative electrode terminal 31. A safety valve 12f is formed for discharging the gas (gas) in the case 11 to the outside when the specified pressure is exceeded.

  In addition, the outer surface of the wall portion 12b on which the positive electrode terminal 30 and the negative electrode terminal 31 are formed (on the side opposite to the electrode body 25 side when the electrode body 25 is accommodated) is along the stacking direction of the electrode bodies 25. In the direction, a plurality of ribs 12g are formed as continuous convex portions. Each rib 12g is continuously formed along the extending direction over the entire width in the extending direction (front-rear direction) of each wall 12b. In addition, the inner surface of the site | part in which the rib 12g was formed in the wall part 12b is formed flat.

  Each rib 12g is formed on the outer surface of the wall 12b where the positive electrode terminal 30 and the negative electrode terminal 31 are formed so as to sandwich the safety valve 12f from the left-right direction. Each rib 12g is formed between the positive electrode terminal 30 and the negative electrode terminal 31 and in the vicinity (near the vicinity) of the positive electrode terminal 30 and the negative electrode terminal 31.

  And as shown in FIG. 1, the secondary battery module 36 as an electrical storage apparatus module can be comprised by arranging the secondary battery 10 comprised as mentioned above in parallel and laminating | stacking (stacking).

  As shown in FIG. 1, in the secondary battery module 36, a plurality of (four in the present embodiment) secondary batteries 10 are provided along the short direction of the secondary battery 10 (case 11). . The plurality of secondary batteries 10 constituting the secondary battery module 36 are fixed (connected) to each other by a connection tool (restraint tool) 37 as a surrounding member surrounding the plurality of secondary batteries 10. As described above, in the present embodiment, the short direction of the case 11 is the stacking direction of the electrode bodies 25 accommodated in the case 11 and the insertion direction of the lid member 13 and the electrode body 25.

  Each secondary battery 10 constituting the secondary battery module 36 is given a load in the short direction of the secondary battery 10 by the connector 37. For this reason, each secondary battery 10 is fixed in a state in which the case 11 (the main body member 12 and the lid member 13) is slightly bent in the short direction.

  In the secondary battery module 36, the positive electrode terminal 30 and the negative electrode terminal 31 of the adjacent secondary battery 10 are electrically connected by the bus bar 38. The bus bar 38 has a long flat plate shape with through holes formed at both ends, and the nut 33b is screwed in a state where the ends of the positive electrode terminal 30 and the negative electrode terminal 31 are inserted into the through holes. It is fixed by screwing it into 33a.

Next, the operation of the secondary battery 10, the power storage device container 14 (case 11), and the secondary battery module 36 configured as described above will be described.
In the accommodation space Sa formed between the main body member 12 and the lid member 13, the surface direction of the layered structure in the electrode body 25 (the surface direction of the positive electrode sheet 21 and the negative electrode sheet 22) and the insertion direction of the lid member 13 The electrode body 25 is accommodated in a state in which they are orthogonal (intersected). In other words, the electrode body 25 is accommodated in the accommodation space Sa in a state where the stacking direction of the electrode body 25 and the insertion direction of the lid member 13 are matched. The rear surface 25b of the electrode body 25 is pressed (pressurized) by the inner side surface 12e formed on the main body member 12, while the front surface 25a is pressed (pressurized) by the inner side surface 13b formed on the lid member 13. The insertion amount of the lid member 13 with respect to the main body member 12 is adjusted so as to be in the state, and the main body member 12 and the lid member 13 can be joined (fixed) to each other in the adjusted state.

  In particular, the lid member 13 is formed smaller than the opening 12 c in a direction orthogonal to the insertion direction with respect to the main body member 12. That is, the outer peripheral end surface 13 a of the lid member 13 is fixed to the main body member 12 in a state of being disposed inside the opening 12 c in the main body member 12 in a direction orthogonal to the insertion direction with respect to the main body member 12. Therefore, even when the length (thickness) of the electrode body 25 in the stacking direction varies, the electrode body 25 is reliably pressed by the inner side surface 12e of the main body member 12 and the inner side surface 13b of the lid member 13. And the separation distance of the positive electrode sheet 21 and the negative electrode sheet 22 which comprises the electrode body 25 can be equalize | homogenized suitably.

  Further, in this embodiment, the electrode body 25 is reliably secured by the inner side surface 12e of the main body member 12 and the inner side surface 13b of the lid member 13 by adjusting the insertion amount of the lid member 13 with respect to the main body member 12 that accommodates the electrode body 25. The distance between the positive electrode sheet 21 and the negative electrode sheet 22 constituting the electrode body 25 can be made more uniform.

  When the laminated electrode body 25 is formed by laminating the positive electrode sheet 21, the negative electrode sheet 22, and the separator 23 as in the present embodiment, the positive electrode sheet 21, the negative electrode sheet 22, and the separator 23 The distance between the positive electrode sheet 21 and the negative electrode sheet 22 tends to increase due to the formed deflection, fine wrinkles, and the like. Further, the laminated electrode body 25 has a large restoring force in the laminating direction due to the above-described deflection and wrinkles, and cannot be sufficiently compressed even if it is compressed in the laminating direction by press working.

  However, in the present embodiment, the main body member 12 and the lid member 13 are fixed to each other in a state where the electrode body 25 is pressed (pressurized) by the main body member 12 and the lid member 13. It is suitably suppressed that the distance between the electrode sheet 21 and the negative electrode sheet 22 is not uniform.

  In the present embodiment, since the electrode body 25 is sandwiched between the main body member 12 and the lid member 13, the electrode body 25 is caused by vibration generated during use as the secondary battery 10 or the secondary battery module 36. It can suppress moving within the accommodation space Sa.

  In the present embodiment, the rear surface 25b of the electrode body 25 is pressed by the inner side surface 12e of the main body member 12, so that the rear surface 25b and the inner side surface 12e are in close contact with each other with the insulating bag 11a interposed therebetween ( Contact). Similarly, since the front surface 25a of the electrode body 25 is pressed by the inner side surface 13b of the lid member 13, the front surface 25a and the inner side surface 13b are in close contact (contact) with the insulating bag 11a interposed therebetween. The

  Therefore, even when the electrode body 25 generates heat due to charging / discharging, the heat generated in the electrode body 25 is transferred to the main body member 12 and the lid member 13 via the insulating bag 11a, and the secondary battery 10 Heat is exchanged with a heat medium (heat exchange medium) that circulates outside, and heat can be released quickly. Similarly, when the temperature of the electrode body 25 is lower than that of the heat medium circulating outside the secondary battery 10, the heat given from the heat medium to the case 11 passes through the insulating bag 11a to the electrode body 25. As a result, the electrode body 25 is heated.

  Thus, in the secondary battery 10 of the present embodiment, heat exchange with the heat medium flowing outside the secondary battery 10 can be promoted, and the temperature of the secondary battery 10 can be easily adjusted. Therefore, in this embodiment, the electrode body 25 is thermally connected to the wall portion 12a of the main body member 12 and the lid member 13 via the insulating bag 11a.

  In addition, each secondary battery 10 constituting the secondary battery module 36 is applied with a load in the short direction of the secondary battery 10 by the connector 37. For this reason, the electrode body 25 accommodated in each secondary battery 10 is slightly in the stacking direction in the electrode body 25 because the case 11 (the main body member 12 and the lid member 13) bends in the short direction of the case 11. It is designed to be compressed. Therefore, in each secondary battery 10, in addition to pressing the electrode body 25 by the main body member 12 and the lid member 13, the electrode body 25 is further pressed by the connector 37 over the case 11 in the stacking direction (front-rear direction). Thus, the separation distance between the positive electrode sheet 21 and the negative electrode sheet 22 can be made more uniform.

  Further, ribs 12g as continuous convex portions are formed on the outer surface of the wall portion 12b where the positive electrode terminal 30 and the negative electrode terminal 31 are formed in a direction along the stacking direction of the electrode bodies 25. For this reason, compared with the structure which does not form the rib 12g, the heat exchange between the heat medium which distribute | circulates the exterior of the case 11 is accelerated | stimulated by enlarging the surface area of the case 11, and the secondary battery 10 (electrode body) The temperature adjustment of 25) can be suitably performed.

  Further, the strength of the case 11 (main body member 12) can be improved by the ribs 12g formed on the wall portion 12b. For this reason, it can suppress that case 11 expand | swells and deform | transforms, for example, when the internal pressure of case 11 (container 14 for electrical storage devices) increases with charging / discharging. When the secondary battery module 36 is formed, the case 11 (power storage device container 14) is applied by a load (constraint load) applied when a plurality of the secondary batteries 10 are provided side by side and fixed to each other by the coupler 37. Can be prevented from being deformed.

  In particular, in the case 11 (power storage device container 14) of the present embodiment, the upper wall portion 12b of the main body member 12 is provided with the electrode holes 30a and 31a and the safety valve 12f. Is relatively low in strength as compared with the other wall portions 12b, and is easily deformed by the internal pressure of the case 11 or a load applied by the connector 37. However, in the present embodiment, the rib 12g is formed on the wall 12b in which the electrode holes 30a and 31a and the safety valve 12f are formed to reinforce the wall 12b, and this problem is preferably solved. ing.

  Furthermore, since the rib 12g of the present embodiment is formed close to the positive electrode terminal 30, the negative electrode terminal 31, and the safety valve 12f, the strength of the wall portion 12b is enhanced, and expansion and deformation are more effective. Can be suppressed.

  In the wall portion 12b, each rib 12g extends (forms) along the stacking direction of the electrode bodies 25, that is, the extending direction of each wall portion 12b. The extending direction of the rib 12g matches the pressing direction when the main body member 12 is formed by press molding. Therefore, in this embodiment, the main body member 12 can be molded and the ribs 12g can be formed efficiently at the same time.

Next, a method for manufacturing the secondary battery 10 will be described.
The electrode body 25 is obtained by alternately laminating the positive electrode sheets 21 and the negative electrode sheets 22 in the thickness direction with the separator 23 interposed therebetween. Further, one end (tip) of the positive electrode current collector terminal 34 is joined to the positive electrode current collector 28 (positive electrode lead 21a) in the electrode body 25 by, for example, spot welding or the like and electrically connected thereto. Further, one end (tip) of the negative electrode current collecting terminal 35 is joined to and electrically connected to the negative electrode current collecting portion 29 (negative electrode lead 22a) by, for example, spot welding. Further, the positive electrode terminal 30 and the negative electrode terminal 31 are assembled in advance on the wall portion 12b of the main body member 12 with an insulating member 32 interposed therebetween.

  Next, as shown in FIG. 2, the electrode body 25 housed in the insulating bag 11 a is formed with respect to the housing space Sa formed by inserting the lid member 13 into the body member 12 from the opening 12 c in the body member 12. The accommodating process to accommodate is performed. More specifically, in the housing step, the electrode body 25 is housed in the main body member 12 in a state in which the stacking direction of the electrode body 25 matches the insertion direction of the lid member 13.

  At this time, as shown in FIG. 5, the other end (base end) of the positive electrode current collector terminal 34 joined to the positive electrode current collector 28 is placed on the base end side that protrudes into the housing space Sa of the case 11 at the positive electrode terminal 30. Connect and electrically connect. Similarly, the other end (base end) of the negative electrode current collector terminal 35 joined to the negative electrode current collector 29 is connected to the base end side of the negative electrode terminal 31 that protrudes into the housing space Sa of the case 11 to be electrically connected. To do. Then, the lid member 13 is inserted into the main body member 12 through the opening 12 c in a state where the electrode body 25 is accommodated in the main body member 12.

  Next, the inner surface 12e formed on the body member 12 presses the rear surface 25b of the electrode body 25 while the inner surface 13b formed on the lid member 13 presses the front surface 25a of the electrode body 25. A fixing step (joining step) is performed in which the outer peripheral end surface 13a of the member 13 and the inner peripheral surface 12d of the main body member 12 are joined and fixed by, for example, laser welding.

  Specifically, the main body member 12 is supported so as not to move in the insertion direction (front-rear direction) of the lid member 13, and a predetermined load is applied to the lid member 13 inserted into the main body member 12 in the insertion direction. Thus, the electrode body 25 is pressed against the main body member 12 and the lid member 13 through the insulating bag 11a. Here, the load applied to the lid member 13 can be used to correct the deflection of the positive electrode sheet 21 and the negative electrode sheet 22 so that the distance between the positive electrode sheet 21 and the negative electrode sheet 22 is uniform, and the load that does not impede the electrolyte impregnation into the electrode body 25 is tested. It is calculated in advance by simulation or the like and set to the calculated load. Then, the main body member 12 and the lid member 13 are joined while the above-described predetermined load is applied to the lid member 13. Thereafter, the accommodation space Sa in the case 11 is filled with an electrolyte (electrolyte) according to the type of the secondary battery 10, and the secondary battery 10 is completed.

Therefore, according to the present embodiment, the following effects can be obtained.
(1) In the accommodation space Sa formed between the main body member 12 and the lid member 13, the electrode body 25 is in a state where the stacking direction of the electrode bodies 25 and the insertion direction of the lid member 13 with respect to the main body member 12 are matched. Is housed. The inner surface 12e formed on the main body member 12 presses the rear surface 25b of the electrode body 25, while the inner surface 13b formed on the lid member 13 presses the front surface 25a of the electrode body 25. Further, the insertion amount of the lid member 13 with respect to the main body member 12 is adjusted, and the main body member 12 and the lid member 13 can be fixed to each other in the adjusted state. In particular, the outer peripheral end surface 13 a of the lid member 13 is fixed to the main body member 12 in a state of being disposed inside the opening 12 c in the main body member 12 in a direction orthogonal to the insertion direction with respect to the main body member 12. Therefore, even when the length (thickness) of the electrode body 25 in the stacking direction varies, the electrode body 25 is reliably pressed by the inner side surface 12e of the main body member 12 and the inner side surface 13b of the lid member 13. And the separation distance of the positive electrode sheet 21 and the negative electrode sheet 22 which comprises the electrode body 25 can be equalize | homogenized suitably. Therefore, it can suppress that an electrical capacity falls.

  (2) Moreover, the electrode body 25 is reliably pressed by the inner surface 12e of the main body member 12 and the inner surface 13b of the cover member 13 by adjusting the insertion amount of the cover member 13 with respect to the main body member 12 which accommodates the electrode body 25. And the separation distance of the positive electrode sheet 21 and the negative electrode sheet 22 which comprises the electrode body 25 can be equalize | homogenized suitably.

  (3) Since the rib 12g continuously extending along the stacking direction of the electrode body 25 is formed on the outer surface of the wall 12b in the main body member 12, the wall of the main body member 12 in which the rib 12g is formed. The strength at 12b (part) can be improved. Therefore, for example, when the internal pressure of the power storage device container 14 (case 11) is increased, the main body member 12 can be prevented from being deformed.

  (4) The case 11 (the main body member 12 and the lid member 13) is made of a metal material, and the electrode body 25 is housed in the housing space Sa in a state of being housed in an insulating bag 11a made of an insulating material. For this reason, the case 11 made of a metal material and the electrode body 25 can be reliably insulated by the insulating bag 11a made of an insulating material.

  (5) In particular, the insulating bag 11a of the present embodiment is formed from a thin (flexible) insulating sheet. For this reason, it can suppress that the press of the electrode body 25 by the main body member 12 and the cover member 13 is prevented by the insulating bag 11a.

  (6) Further, in the secondary battery 10 of the present embodiment, the rear surface 25b of the electrode body 25, the insulating bag 11a, and the wall portion 12b of the main body member 12 are in close contact, while the front surface 25a of the electrode body 25, the insulating bag 11a, And the inner surface 13b of the lid member 13 is in close contact. Therefore, heat exchange between the heat medium flowing outside the secondary battery 10 and the electrode body 25 can be promoted, and the temperature of the secondary battery 10 (electrode body 25) can be easily adjusted.

  (7) The separation distance between the positive electrode sheet 21 and the negative electrode sheet 22 constituting the electrode body 25 can be made uniform, and a reduction in electric capacity can be suppressed. For this reason, it can suppress that the electrical capacity as the secondary battery 10 falls, and can improve the electric energy which can be utilized by one full charge.

The embodiment is not limited to the above, and may be embodied as follows, for example.
As shown in FIGS. 6 and 7, the electrode body 25 is formed by forming the positive electrode sheet 21, the negative electrode sheet 22, and the separator 23 into a strip shape (long sheet shape) and sandwiching the separator 23 therebetween. In the state, the positive electrode sheet 21 and the negative electrode sheet 22 may be wound in a spiral shape so that the positive electrode sheet 21 and the negative electrode sheet 22 form a layer (layered structure).

  In this case, as shown in FIG. 7, the positive electrode sheet 21 indicated by the arrow Y <b> 5 is provided at one edge portion (left edge portion in this example) in the width direction (left and right direction) indicated by the arrow Y <b> 1 in the positive electrode sheet 21. The non-application region 26b is formed so as to extend along the length direction, and a positive electrode lead 21a extending outward (left side) in the width direction is provided. On the other hand, the non-application region 26b is formed so as to extend along the length direction of the negative electrode sheet 22 on the other edge portion in the width direction in the negative electrode sheet 22 (right edge portion in this example), A negative electrode lead 22a extending outward in the width direction (right side) is provided. As a result, a positive electrode current collector 28 in which the positive electrode lead 21 a forms a layer is formed at the left edge of the electrode body 25. Similarly, a negative electrode current collecting portion 29 in which the negative electrode lead 22 a forms a layer is formed on the right edge portion of the electrode body 25. And it is good to form in the shape flat in the up-down direction and the left-right direction by pressing the electrode body 25 which wound the positive electrode sheet 21 and the negative electrode sheet 22.

  When formed in this way, as shown in FIG. 6, the electrode body 25 has an accommodation space in a state where the flat surfaces (front surface 25 a and rear surface 25 b) of the electrode body 25 and the insertion direction of the lid member 13 are orthogonal (intersect). It is good to accommodate in Sa. Note that the direction orthogonal to the flat surface of the electrode body 25 coincides with the stacking direction of the electrode body 25 in the formation region of the flat surface. Even in such a configuration, the electrode body 25 is pressed by the inner surface 12 e of the main body member 12 and the inner surface 13 b of the lid member 13, and the separation distance between the positive electrode sheet 21 and the negative electrode sheet 22 constituting the electrode body 25. Can be made uniform. Therefore, it can suppress that an electrical capacity falls.

  As shown in FIG. 8, with respect to the outer surface of the lid member 13, as a plurality of protrusions and heat exchange portions along the extending direction (vertical direction) of the positive electrode current collector 28 and the negative electrode current collector 29. The protruding line 13c may be formed to protrude. Further, the ridges 13 c may extend along a direction (left-right direction) orthogonal to the extending direction among the surface directions of the positive electrode sheet 21 and the negative electrode sheet 22 constituting the electrode body 25. Further, the ridges 13 c may be provided on the outer surface of the wall portion 12 a in the main body member 12 instead of or in addition to the outer surface of the lid member 13. In other words, at least one of the main body member 12 and the lid member 13 may be formed with a heat exchange part that promotes heat exchange between the case 11 and the heat medium.

  According to this, heat exchange with the heat medium can be promoted, and thereby the temperature adjustment (cooling and heating) of the electrode body 25 accommodated in the accommodation space Sa can be facilitated. Moreover, heat exchange with a heat medium can be accelerated | stimulated with the simple structure of the protruding item | line 13c. In the secondary battery module 36, heat is generated between the lid member 13 and the outer surface of the wall 12 a (main body member 12) in the adjacent secondary battery 10 or between the lid member 13 and the connector 37. A medium flow path 39 for circulating the medium (heat exchange medium) can be formed. For this reason, in the secondary battery module 36, the temperature of the secondary battery 10 sandwiched between the other secondary batteries 10 can be suitably adjusted.

  As shown in FIG. 9A, a step 40 is formed in the opening 12c of the main body member 12 over the entire circumference of the opening 12c, and the lid member 13 is formed on the inner peripheral surface 12d of the step 40. And the outer peripheral end surface 13a of the lid member 13 may be fixed to the main body member 12 by joining (welding). In this case, the length (depth) along the stacking direction of the electrode body 25 in the stepped portion 40 is such that the inner surface 13b of the lid member 13 and the electrode body in the insertion direction of the lid member 13 (stacking direction of the electrode body 25). 25 is set to such a length that the front surface 25a contacts the inner surface 13b and the stepped portion 40 does not contact. Thus, the main body member 12 may not be formed larger than the lid member 13 over the entire inner periphery thereof, and is formed larger than the lid member 13 in a portion where the lid member 13 is fixed to the main body member 12. It only has to be.

  As shown in FIG. 9B, the lid member 13 includes a flat plate portion 13d having a rectangular flat plate shape (substantially square flat plate shape) larger than the opening 12c of the main body member 12 in a front view, and the flat plate portion 13d. A rectangular parallelepiped shape may be formed on the surface disposed on the electrode body 25 side, and a fitting portion 13e as an insertion portion inserted into the opening portion 12c of the main body member 12 may be formed. In this case, the lid member 13 may be fixed to the main body member 12 by joining the outer peripheral end surface 13a of the fitting portion 13e and the inner peripheral surface 12d of the main body member 12. In this case, the length (height) along the stacking direction of the electrode body 25 in the fitting portion 13e is the inside of the lid member 13 (the fitting portion 13e) in the insertion direction of the lid member 13 (the stacking direction of the electrode body 25). The length is set such that the side surface 13b and the front surface 25a of the electrode body 25 are in contact with each other, and the surface disposed on the electrode body 25 side of the flat plate portion 13d is not in contact with the tip surface of the wall portion 12b. Thus, the lid member 13 does not have to be formed smaller than the inner peripheral surface 12d of the main body member 12 over its entirety, and in the portion where the lid member 13 is fixed to the main body member 12, than the inner peripheral surface 12d. What is necessary is just to form small.

  Each rib 12g may be formed on the outer surface of another wall portion 12b in addition to or instead of the wall portion 12b in which the electrode holes 30a and 31a and the safety valve 12f are formed. The rib 12g may be formed away from the electrode holes 30a and 31a and the safety valve 12f.

  (Circle) each rib 12g may be continuously formed over a part of extension direction (front-back direction) of each wall part 12b. A recess may be formed on the inner side surface of the wall 12b where the rib 12g is formed, corresponding to the rib 12g. In this case, a convex portion corresponding to the concave portion may be formed on the outer peripheral end surface 13 a of the lid member 13. Moreover, it is good also as a structure which abbreviate | omitted one or both of the ribs 12g.

  (Circle) You may form the square-shaped rib extended and formed from the peripheral part of the outer surface in the cover member 13 to the opposite side to the electrode body 25. FIG. According to this, the area of the outer peripheral end surface 13a can be enlarged, and joining with the inner peripheral surface 12d of the main body member 12 can be made easier.

  The predetermined load applied to the lid member 13 in the fixing process may be a load that allows the main body member 12 and the lid member 13 and the electrode body 25 to come into contact with each other, and is a load that can completely correct the deflection generated in the electrode body 25. It does not have to be.

The electrode body 25 may be laminated by folding the positive electrode sheet 21 and the negative electrode sheet 22 in a bellows shape with the separator 23 interposed therebetween.
○ Of the inner surfaces of the main body member 12 and the lid member 13, an insulating material is coated on a contact portion (contact region) with the electrode body 25 to form an insulating layer as an insulating portion. The lid member 13 may be insulated. In this case, the insulating bag 11a may be omitted.

The shape of the case 11 (main body member 12) may be formed in a columnar shape or an elliptical column shape that is flat in the left-right direction.
(Circle) you may change suitably the number of the secondary batteries 10 which comprise a secondary battery module.

  ○ The secondary battery 10 or the secondary battery module 36 according to the above embodiment is mounted on a vehicle (for example, an industrial vehicle or a passenger vehicle), and is charged from a generator mounted on the vehicle, while being supplied from the secondary battery 10. Electric components such as a compressor for an air conditioner, an electric motor for driving wheels, or a car navigation system may be driven by electric power. According to this, the electric energy which can be utilized by one full charge can be improved by suppressing that an electrical capacity falls as the secondary battery 10 or the secondary battery module 36. FIG. For this reason, it can suppress that a charge cycle becomes short as a vehicle.

  The present invention may be embodied as an electric double layer capacitor as a power storage device.

  Sa ... Accommodating space, 10 ... Secondary battery (power storage device), 11 ... Case (container main body), 11a ... Insulating bag (inner container), 11g ... Rib (convex portion), 12 ... Main body member (first member) , 12a ... wall portion, 12c ... opening portion, 12d ... inner peripheral surface, 12e ... inner side surface (first pressing surface), 13 ... lid member (second member, insertion portion), 13a ... outer peripheral end surface, 13b ... inner side surface (Second pressing surface), 13c ... ridges (heat exchange part, protrusion part), 13e ... fitting part (insertion part), 14 ... container for power storage device, 21 ... positive electrode sheet, 22 ... negative electrode sheet, 23 ... Separator, 25 ... Electrode body, 25a ... Front (end face), 25b ... Rear face (end face), 26 ... Metal foil (metal thin plate), 27 ... Active material layer, 36 ... Secondary battery module (power storage device module), 38 ... Coupling tool.

Claims (11)

A power storage device that accommodates a layered electrode body in which a positive electrode sheet and a negative electrode sheet having an active material layer formed on the surface of a thin metal plate are alternately stacked in the thickness direction with a sheet-like separator interposed therebetween A container for
Container body, forming a body member have a opening for housing the electrode assembly, the housing space between the main body member is inserted into the body member from said opening to seal the opening of said body member a lid member that is configured to include a main body member and the lid member is made of a metal material, the cover member, the formed smaller than the opening at the outer peripheral end surface in a direction orthogonal to the insertion direction relative to the body member ,
In a state where the electrode body is accommodated in the accommodation space, the stacking direction in the electrode body is coincident with the insertion direction,
While the main body member is formed with a first pressing surface that faces the lid member across the accommodation space and presses one end surface of both end surfaces of the electrode body positioned in the stacking direction. The lid member is formed with a second pressing surface that faces the main body member across the housing space and presses the other end surface of the both end surfaces,
In the opening of the body member, a step is formed over the entire circumference of the opening,
The outer peripheral end surface of the lid member is joined to the inner peripheral surface of the stepped portion of the main body member in a state of being arranged inside the opening of the main body member in a direction orthogonal to the insertion direction. Fixed ,
The depth along the stacking direction of the electrode body in the stepped portion is such that, in the insertion direction of the lid member, the second pressing surface of the lid member and the other end surface of the electrode body are in contact with each other, and power storage device for containers with the stepped portion and the second pressing surface, characterized in Rukoto is set to a length not contacting. 2. The power storage device container according to claim 1, wherein at least one of the main body member and the lid member is formed with a heat exchange portion that promotes heat exchange between the container main body and the heat medium. . The power storage device container according to claim 2 , wherein the heat exchanging portion is a protruding portion that protrudes from the container main body. The power storage device according to any one of claims 1 to 3 , wherein a convex portion that continuously extends along a stacking direction of the electrode body is formed on an outer surface of the main body member. Container. Prior Symbol electrode body, of claims 1 to 4, characterized in that it is accommodated in the accommodation space while being insulated from the container main body by the insulating portion interposed between the container body and the electrode body The container for a power storage device according to any one of the above. A power storage device in which a positive electrode sheet and a negative electrode sheet in which an active material layer is formed on the surface of a thin metal plate are alternately stacked in the thickness direction with a sheet-like separator interposed therebetween, and a layered electrode body is accommodated In a power storage device including a container for
Said power storage device for containers, a power storage device which is a power storage device for container according to any one of claims 1-5. A power storage device module, wherein a plurality of the power storage devices according to claim 6 are arranged in parallel along a stacking direction of the electrode body. The power storage device module according to claim 7 , wherein the plurality of power storage devices are fixed to each other by a surrounding member surrounding the plurality of power storage devices. A vehicle comprising the power storage device according to claim 6 . A vehicle comprising the power storage device module according to claim 7 or 8 . A power storage device in which a positive electrode sheet and a negative electrode sheet in which an active material layer is formed on the surface of a thin metal plate are alternately stacked in the thickness direction with a sheet-like separator interposed therebetween, and a layered electrode body is accommodated A manufacturing method of
It said body from an opening formed in the main body member by the cover member to the insertion direction orthogonal to the direction lid member at an outer peripheral end face is smaller than the opening of the insert to the body member with respect to the body member In the accommodation space formed by sealing the opening of the member, the electrode body is accommodated in a state in which the stacking direction of the electrode body and the insertion direction are matched,
In the electrode body, one end surface of both end surfaces positioned in the stacking direction is pressed by a first pressing surface that is formed on the main body member and faces the lid member with the accommodation space interposed therebetween. The other end surface is pressed by a second pressing surface that is formed on the lid member and faces the main body member across the housing space, and the outer peripheral end surface of the lid member is orthogonal to the insertion direction. in the direction, the state which is disposed inside the opening in the body member, the outer peripheral end face and the inner peripheral surface of the stepped portion formed over the entire circumference of the opening in the opening of the body member of the lid member so as to fix and bond the bets one another,
The depth along the stacking direction of the electrode body in the stepped portion is such that, in the insertion direction of the lid member, the second pressing surface of the lid member and the other end surface of the electrode body are in contact with each other, and A method of manufacturing a power storage device, wherein the length is set such that the second pressing surface does not contact the stepped portion .