JP5488035B2 - Laminated battery structure - Google Patents

Description

  The present invention relates to a laminated battery structure formed by laminating a plurality of laminated batteries.

  Conventionally, there are various types of batteries. Among them, a laminated battery (laminated) in which a battery main body is housed in a flexible sheet-like container in which the surface of an aluminum substrate or the like is coated with an insulating resin. The cell) is expected to have many demands because it is easy to manufacture and handle and is inexpensive. A laminate battery can be used by laminating a plurality of sheets and flexibly connecting the electrodes of each battery by any of the connection methods of parallel connection or series connection.

  For example, in the assembled battery and the single battery disclosed in Patent Document 1, the laminate cell is held by a holding member to form a single battery, and the laminate cell uses the elastic characteristics of a pair of elastic portions constituting the holding member. Is held. In addition, a unit cell is formed by stacking unit cells.

JP 2005-108693 A

  However, Patent Document 1 or the like does not disclose a technique for stacking and holding a plurality of laminate cells together. In this case, it is necessary to devise the holding frame in order to stably hold a plurality of laminate cells.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a laminated battery structure capable of stably holding a plurality of laminated batteries with their positions fixed.

One embodiment of the present invention is a laminate battery in which a flat battery body is housed in a flexible sheet container, and a pair of sheet electrodes are drawn out of the sheet container from the battery body. A plurality of layers are stacked in the stacking direction,
The laminated battery in which the plurality of sheets are laminated is held in a resin holding frame,
On the four sides of each laminated battery, a sheet end formed by projecting the end of the sheet container outward from the battery body is formed.
The holding frame is formed by forming a plurality of insertion recesses into which the sheet end portion is inserted adjacent to each other in the stacking direction on at least an inner portion of the frame portions facing each other among the four frame portions. A plurality of positioning projections for positioning the four corners in the plate surface direction of the battery body in the plurality of laminated batteries are adjacent to at least an inner portion of the frame portions facing each other among the frame portions in the stacking direction. name provided Te is,
The plate surface direction includes a drawing direction in which the electrode is drawn out from the battery body perpendicular to the stacking direction, and a left-right direction orthogonal to the drawing direction and the stacking direction,
The sheet-like container has an auxiliary part that is smaller than the thickness of the part that accommodates the battery body by forming a gap between the electrode and the electrode at an outer position in the extraction direction with respect to the part that accommodates the battery body. Have
The positioning protrusion is formed adjacent to the corner of the battery body and facing the auxiliary part,
The positioning protrusion guides the side of the battery body in the pull-out direction so that the battery main body is positioned in the pull-out direction, and the inside of the frame portion positioned on both sides of the holding frame in the left-right direction. The laminated battery structure is characterized in that the battery body is positioned in the left-right direction by guiding the side portions of the battery body in the left-right direction (claim 1).

In the laminated battery structure of the present invention, the shape of the holding frame that holds a plurality of laminated laminated batteries is devised.
Specifically, in the holding frame of the present invention, a plurality of insertion recesses into which the sheet end of the laminated battery is inserted are formed adjacent to each other in the stacking direction in at least an inner portion of the frame portions facing each other among the four frame portions. Do it. Thus, the plurality of laminated batteries are stably held by the holding frame in a stacked state by inserting the sheet end portion into the insertion recess.
In addition, the holding frame is formed by laminating positioning protrusions for positioning the four corners in the plate surface direction of the battery main body in a plurality of laminated batteries on at least an inner portion of the frame portions facing each other among the four frame portions. A plurality are provided adjacent to each other in the direction. As a result, in the laminated battery, the four corners of the battery main body are supported by the positioning protrusions, so that the positions of the electrode extraction direction and the direction perpendicular to the electrode are fixed in a stacked state. .
Therefore, according to the laminated battery structure of the present invention, a plurality of laminated batteries can be stably held with their positions fixed.

The perspective view which shows the laminated battery structure in an Example. The front view which shows the laminated battery structure in an Example. The top view which shows the laminated battery structure of the state which laminated | stacked the several holding frame in an Example. Sectional explanatory drawing which expands and shows the extraction | drawer edge part of the electrode in the sheet-like container of a laminated battery in an Example. FIG. 3 is an enlarged view showing a second frame portion in the holding frame of the laminated battery structure in the embodiment, and is a cross-sectional explanatory view taken along the line AA in FIG. 2. FIG. 3 is an enlarged view showing a second frame portion in the holding frame of the laminated battery structure in the example, and is a cross-sectional explanatory view taken along line B-B in FIG. 2. Cross-sectional explanatory drawing which expands and shows the sheet | seat edge part of the drawer direction in the sheet-like container of a laminated battery in an Example. Cross-sectional explanatory drawing which expands and shows the sheet | seat edge part of the left-right direction in the sheet-like container of a laminated battery in an Example. Sectional explanatory drawing which expands and shows the periphery of the fitting part provided in the frame part in the holding frame in an Example.

A preferred embodiment of the above-described laminated battery structure of the present invention will be described.
In the present invention, the electrode is drawn from one side and the other side of the laminated battery, and all the electrodes drawn from the one side are parallel to each other on one side. It is connected facing the facing part of the connecting bus bar, and all the electrodes drawn from the other side part are connected facing the facing part of the connecting bus bar on the other side in a parallel state to each other, Each of the connecting bus bars can have a function of a cooling fin.
In this case, a plurality of laminated batteries can be easily electrically connected in parallel, and even in a state where they are connected by a connecting bus bar, it is possible to easily cool an electrode that easily generates heat.

According to another aspect of the present invention, a flat battery body is accommodated in a flexible sheet-like container, and a pair of sheet-like electrodes are drawn out of the sheet-like container from the battery body. A plurality of laminated batteries are laminated in the laminating direction, and the laminated batteries laminated are held in a resin-made holding frame, and on each side of each laminated battery, A sheet end formed by projecting an end of the sheet-like container is formed on the outer side, and the holding frame is attached to the inner portion of at least one of the four frame portions facing each other. A plurality of insertion recesses into which the end portions are inserted are formed adjacent to each other in the stacking direction, and the battery main body in the plurality of laminated batteries is formed on at least an inner portion of the frame portions facing each other among the four frame portions. Side of the plate Be provided by multiple adjacent positioning projections for positioning the square corners in the stacking direction of said holding frame is Yes by stacking a plurality of the above lamination direction, one side of the lamination direction in the holding frame In the laminated battery structure, an end face is provided with an insulating plate portion for ensuring insulation with a holding frame adjacent to the holding frame so as to face the stacking direction with respect to the electrode. (Claim 3).
In this case, when the plurality of laminated batteries in any holding frame and the plurality of laminated batteries in the holding frame adjacent to the holding frame are electrically connected in series, they are connected to each other by the insulating plate portion. It is possible to ensure the insulation between the parts that are not.

According to still another aspect of the present invention, a flat battery body is accommodated in a flexible sheet-like container, and a pair of sheet-like electrodes are drawn from the battery body to the outside of the sheet-like container. A plurality of laminated batteries are laminated in the laminating direction, and the laminated batteries laminated are held in a resin-made holding frame, and the battery body is disposed on four sides of each laminated battery. A sheet end formed by projecting an end of the sheet-like container outward is formed, and the holding frame is attached to at least an inner portion of the frame portions facing each other among the four frame portions. A plurality of insertion recesses into which the sheet end portion is inserted are formed adjacent to each other in the stacking direction, and the battery in the plurality of laminated batteries is formed on at least an inner portion of the frame portions facing each other among the four frame portions. Of the body Positioning projections for positioning the four sides of the corner portion in a plane direction becomes provided with a plurality adjacent to the stacking direction, the holding frame, the fitting portion provided four frame portion formed separately on the holding frame The four frame parts are composed of a pair of first frame parts positioned in the direction of drawing out the electrodes and the remaining pair of second frame parts, and the positioning protrusions are Provided on both sides in the pull-out direction in the inner part of the pair of second frame portions, and guides the side portions in the pull-out direction of the battery body in the laminated battery by the positioning protrusions, and also the pair of second frames. The laminated battery structure is configured such that the inner side end of the frame part guides the remaining side of the battery body in the laminated battery .
In this case, the four frame portions can be easily assembled without using a fixing tool such as a screw. Therefore, the holding frame can be easily assembled.
Further, the positioning of the plurality of laminated batteries can be performed more easily by the positioning protrusions and the inner ends of the pair of second frame portions.

Further, the laminated battery structure may be for vehicle use (claim 5).
In this case, each laminated battery can be protected from vibration or the like in the vehicle by stably holding each laminated battery by the holding frame.

Examples of the laminated battery structure of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 to 4, the laminated battery structure 1 of the present example includes a flat battery body 32 housed in a flexible sheet-like container 31, and a pair of sheet-like electrodes 33 </ b> A from the battery body 32. , 33B are laminated in the laminating direction D by laminating a plurality of laminated batteries (laminate cells) 3 drawn out of the sheet-like container 31. A laminated battery 3 in which a plurality of sheets are laminated is held in a holding frame 2 that holds the four sides. Formed on the four sides of each laminated battery 3 are sheet end portions 310 formed by projecting the sheet-like container 31 outward from the battery body 32. The holding frame 2 is formed by forming a plurality of insertion recesses 222 into which the sheet end portion 310 is inserted adjacent to each other in the stacking direction D in the inner portion of the frame portion 22 facing each other among the four frame portions 21 and 22. Positioning projections 223 for positioning the four corners 321 in the plate surface direction of the battery body 32 in the plurality of laminated batteries 3 on the inner portions of the frame portions 22 of the four frame portions 21 and 22 facing each other. Are provided adjacent to each other in the stacking direction D.

Hereinafter, the laminated battery structure 1 of this example will be described in detail with reference to FIGS.
In this example, the drawing direction H refers to the direction in which the electrodes 33A and 33B are pulled out from the laminated battery 3, and the left-right direction W refers to the direction perpendicular to the drawing direction H in the surface direction of the laminated battery 3. . Further, the stacking direction D refers to a direction in which a plurality of laminated batteries 3 are stacked.
The laminated battery structure 1 of this example constitutes a vehicle-mounted battery.
As shown in FIGS. 7 and 8, the sheet-like container 31 of this example is formed in a bag shape that accommodates the battery main body 32. The sheet-like container 31 is formed using a pair of aluminum sheets (aluminum laminate film) 311 whose inner sides are covered with an insulating resin 312. The pair of electrodes 33 </ b> A and 33 </ b> B in this example includes a plus electrode 33 </ b> A drawn from one side of the laminated battery 3 and a minus electrode 33 </ b> B drawn from the other side of the laminated battery 3.

As shown in FIG. 7, the sheet end 310 in the vertical direction of the sheet-like container 31 (the lead-out direction H of the electrodes 33A and 33B) includes the insulating resin 312 of the pair of aluminum sheets 311 and the plus electrode 33A and the minus electrode 33B. Each insulating resin 331 applied on the surface is formed by welding. As shown in FIG. 8, the sheet end portion 310 in the left-right direction W of the sheet-like container 31 (the horizontal direction orthogonal to the drawing direction H of the electrodes 33 </ b> A and 33 </ b> B) lies between the insulating resins 312 facing each other of the pair of aluminum sheets 311. It is formed by welding or formed from a continuous aluminum sheet 311.
Further, in the laminated battery 3, an electrolytic solution is placed in a gap 30 in which the battery main body 32 is disposed. The laminate battery 3 of this example is a lithium battery.

As shown in FIGS. 7 and 8, the laminated battery 3 of this example includes a plate-shaped battery body 32 that is encased from both sides by a pair of aluminum sheets 311 and is provided on one side of the battery body 32. The electrode 33 </ b> A and a sheet-like negative electrode 33 </ b> B provided on the other side of the battery main body 32 are formed by being drawn from between the ends of the pair of aluminum sheets 311.
Sheet end portions 310 of the sheet-like container 31 are formed on both sides in the drawing direction H where the electrodes 33A and 33B are drawn out from the sheet-like container 31 and on both sides in the left-right direction W.

As shown in FIG. 4, all of the plus electrodes 33 </ b> A and all of the minus electrodes 33 </ b> B in this example are drawn out in parallel to the surface direction of the laminated battery 3. All the positive electrodes 33A drawn in parallel to the surface direction overlapping with the stacking direction D are joined together while being sandwiched by the connecting bus bars 4 on one side, and all the negative electrodes 33B drawn in parallel to the surface direction. The two are also coupled in a state of being sandwiched by the connecting bus bar 4 on the other side.
Each connecting bus bar 4 is formed with a facing portion 41 that cuts a sheet metal and faces each electrode 33A (33B). Further, all the positive electrodes 33A are connected in parallel with each other to face the facing portion 41 of the connection bus bar 4 on one side, and all the negative electrodes 33B are connected in parallel with each other on the other connection bus bar. The four facing portions 41 are connected so as to face each other. With each connection bus bar 4, a plurality of laminated batteries 3 can be easily electrically connected in parallel.

Further, when the electrodes 33A (33B) are connected by the connection bus bar 4, a spacer 42 is used for sandwiching the electrodes 33A (33B) between the facing portions 41 of the connection bus bar 4. The spacer 42 can be formed separately from the connecting bus bar 4 or can be formed integrally.
Each electrode 33 </ b> A (33 </ b> B) is sandwiched and connected from both sides between the facing portion 41 of each connection bus bar 4 and the spacer 42. In this example, the bolts 51 are inserted into the through holes provided in the electrodes 33A (33B), the connection bus bar 4, and the spacer 42, and the electrodes 33A (33B), the connection bus bar 4, the spacer 42 are inserted by the bolts 51 and the nuts 52. The electrodes 33A (33B) can be electrically integrated by tightening. In addition, each connection bus bar 4 can also be formed in a wave shape by bending a sheet metal.

As shown in FIG. 1 and FIG. 2, the holding frame 2 of this example is assembled into a square frame shape by fitting four fitting parts 25 provided on the holding frame 2 to four separately formed frame parts 21 and 22. It is. The four frame portions 21, 22 are composed of a pair of first frame portions 21 located in the lead-out direction H of the electrodes 33 </ b> A, 33 </ b> B and the remaining pair of second frame portions 22. The first frame portion 21 is located on the side where the positive electrode 33 </ b> A or the negative electrode 33 </ b> B is drawn out in the laminated battery 3, and the second frame portion 22 is located on the side orthogonal to the first frame portion 21.
The pair of first frame portions 21 of this example share components, and the pair of second frame portions 22 also share components.

  As shown in FIG. 6, a plurality of insertion recesses 222 in the holding frame 2 of this example are formed adjacent to each other in the stacking direction D in the inner portion of the second frame portion 22. As shown in FIGS. 1 and 2, the positioning projections 223 in the holding frame 2 of the present example are provided on both sides in the drawing direction H in the inner portions of the pair of second frame portions 22. The positioning projection 223 guides the side of the laminated battery 3 in the drawing direction H of the battery main body 32, and the inner side 225 of the pair of second frame parts 22 causes the remaining side of the battery main body 32 in the laminated battery 3. Has been guided.

As shown in FIG. 4, the sheet-like container 31 of the present example accommodates the battery main body 32 by forming a gap between the electrodes 33 </ b> A and 33 </ b> B at an outer position in the drawing direction H with respect to a portion accommodating the battery main body 32. It has an auxiliary portion 34 that is smaller than the thickness of the portion to be processed.
The pair of first frame portions 21 are formed with insertion holes 213 for inserting and arranging the electrodes 33 </ b> A (33 </ b> B) in the plurality of laminated batteries 3.

As shown in FIG. 2, the positioning protrusion 223 of this example is formed adjacent to the corner 321 of the battery body 32 and facing the auxiliary portion 34 in the sheet-like container 31 of the laminated battery 3.
As shown in FIG. 5, guide recesses 224 that guide the auxiliary portion 34 of the sheet-like container 31 are formed in the inner portion of the positioning projection 223 in the stacking direction D by the same number as the number of the laminated batteries 3 provided. Yes. The positioning projections 223 can guide the auxiliary portion 34 of the sheet-like container 31 so that the laminated battery 3 is not displaced in the drawing direction H.

  As shown in FIGS. 1 and 2, an arrangement recess 23 for projecting the electrodes 33 </ b> A and 33 </ b> B of the laminated battery 3 is formed at the end of the holding frame 2 in the drawing direction H. On both sides of the holding frame 2 in the left-right direction W, projecting portions 24 that project in the pull-out direction H and form the placement recesses 23 are formed. The first frame portion 21 forms an arrangement recess 23 by a frame portion formed in the left-right direction W and engagement portions 211 formed at both end portions in the left-right direction W. The second frame portion 22 has an engaged portion 221 that engages with the engaging portion 211 of the first frame portion 21. The protruding portion 24 is formed by the engaging portion 211 of the first frame portion 21 and the engaged portion 221 of the second frame portion 22.

  As shown in FIG. 9, the fitting portion 25 provided on the first frame portion 21 is formed by the elastic deformation claw 251, and the fitting portion 25 provided on the second frame portion 22 engages the elastic deformation claw 251. It is formed by a locking hole 252 to be stopped. The elastic deformation claw 251 is formed to protrude inward from the engaging portion 211 of the first frame portion 21, and the locking hole 252 is formed in the engaged portion 221 of the second frame portion 22. The elastic deformation claw 251 can be formed in the second frame portion 22 and the locking hole 252 can be formed in the first frame portion 21.

As shown in FIG. 1, each connection bus bar 4 of this example has a function of a cooling fin, and the electrodes 33 </ b> A and 33 </ b> B that are easily heated to high temperatures can be cooled via the connection bus bar 4.
More specifically, the electrodes 33A and 33B and the connecting bus bar 4 of each laminated battery 3 are arranged in the arrangement recess 23 in the first frame portion 21, and the protruding portion 24 (first portion) of each second frame portion 22 is arranged. A through-hole 241 penetrating in the left-right direction W is formed in the engaging portion 211 of the first frame portion 21 and the engaged portion 221) of the second frame portion 22. The through holes 241 are formed in four protruding portions 24 on the holding frame 2 in the vertical and horizontal directions. The cooling air A is introduced into the arrangement recess 23 from one through-hole 241 in the left-right direction W, and the electrodes 33A and 33B are cooled by the cooling air A via the connecting bus bar 4, and then the cooling air after this cooling is supplied. A can be discharged from the other through-hole 241 in the left-right direction W.

As shown in FIGS. 1 and 4, the holding frame 2 of the present example is supplied with cooling air A to the sheet end portion 310 in the drawing direction H and the base end portions of the electrodes 33 </ b> A and 33 </ b> B, so that the electrode 33 </ b> A, A cooling passage 26 for cooling 33B is formed. This cooling passage 26 is formed in the upper and lower positions of the holding frame 2 so as to penetrate in the left-right direction W at an inner position in the drawing direction H with respect to the arrangement recess 23, and the cooling air flows along the left-right direction W of the laminated battery 3. A is formed to pass through. The cooling passage 26 can allow the cooling air A to pass through a portion partitioned by the laminate battery 3.
Moreover, when gas leaks from the sheet | seat edge part 310 which pulled out electrode 33A, 33B in the sheet-like container 31, this gas can also be let into the cooling channel | path 26 pass. Further, the left and right sheet end portions 310 of the sheet-like container 31 are also communicated with the cooling passage 26 via a gap in the insertion recess 222 of the holding frame 2 or the like. Thereby, the gas leaked from the four sheet end portions 310 in the sheet-like container 31 can be collected into the cooling passage 26.

  As shown in FIG. 3, the laminated battery structure 1 of this example has a plurality of holding frames 2 for holding a plurality of laminated batteries 3 constituting a connection battery set 11 (see FIGS. 5 and 6). A plurality of laminated batteries 3 constituting the battery set 11 are electrically connected in series. That is, in the laminated battery structure 1 of this example, the plurality of laminated batteries 3 constituting each connection battery set 11 are electrically connected in parallel, and each connection battery set 11 is electrically connected in series. The

More specifically, the holding frames 2 are stacked in a state where the connection bus bar 4 in one connection battery set 11 and the connection bus bar 4 in the other connection battery set 11 are arranged adjacent to each other. And the connection bus bar 4 in the connection battery set 11 of the one holding frame 2 and the connection bus bar 4 in the connection battery set 11 of the other holding frame 2 are connected by the external bus bar 61 to connect the two connection battery sets 11. Electrically connect in series. The connection battery set 11 is laminated in an arbitrary number, and a fastening member is arranged in the recess 226 (see FIG. 2) provided in the left and right side frame portions 22 in each holding frame 2 and integrated by this fastening member. can do.
The external bus bar 61 alternately connects adjacent battery sets 11 on one side and the other side in the drawing direction H of the laminated battery structure 1 in which the electrodes 33A and 33B are arranged. Between the connected battery groups 11 where the external bus bar 61 does not appear on the front side, the external bus bar 61 is connected on the back side.

  Further, as shown in FIG. 3, the laminated battery structure 1 of this example includes a plurality of holding frames 2 that hold a plurality of laminated batteries 3, and both sides in the stacking direction D with respect to the plurality of holding frames 2. The insulating end plates 20 provided with the conductive plate terminal portions 201 are respectively laminated. The plurality of holding frames 2 are assembled as a laminated holding frame assembly 12 by sandwiching a fastening member between the insulating end plates 20. The connection bus bar 4 in the end holding frame 2A, which is the holding frame 2 stacked on one end in the laminated holding frame 12, and the plate terminal portion 201 in the insulating end plate 20 adjacent to the end holding frame 2A are outside. They are connected by the attached bus bar 61. The laminated holding frame 12 is electrically connected to the outside by a wire harness from the plate terminal portion 201 to which the external bus bar 61 is connected.

Further, as shown in FIG. 4, the holding frame 2 is laminated in the same direction as the laminating direction D of the plurality of laminated batteries 3, and each of the holding frames 2 has an end face on one side in the laminating direction D. An insulating plate portion 28 for ensuring insulation with the holding frame 2 adjacent to the holding frame 2 is provided facing the stacking direction D with respect to the electrodes 33A and 33B.
In the holding frames 2 adjacent to each other, a plus electrode 33A in one holding frame 2 and a minus electrode 33B in the other holding frame 2 adjacent to the holding frame 2 by the insulating plate portion 28 provided in one holding frame 2. It is possible to ensure insulation. This insulating property can be ensured between the connected bus bars 4 that are not connected by the external bus bar 61.
The insulating plate portion 28 is formed to span the left and right engaging portions 211 in the first frame portion 21 of the holding frame 2. Moreover, the other side end surface of the arrangement | positioning recessed part 23 in the 1st frame part 21 of each holding frame 2 is open | released.

  As shown in FIGS. 1, 2, and 5, each holding frame 2 has a projection 271 for positioning when stacked and a recess 272 for arranging the projection 271 on one side in the stacking direction D. It is formed in the end surface and the other side end surface. The holding frames 2 are stacked in parallel with each other by positioning the protrusions 271 and the recesses 272.

As shown in FIG. 6, in the holding frame 2 of this example, the insertion recess 222 into which the sheet end portion 310 of the laminated battery 3 is inserted into the inner part of the pair of second frame parts 22 is a laminate of the laminated battery 3. The same number as the number is formed adjacent to the stacking direction D.
Further, as shown in FIG. 5, in the holding frame 2, the four corners 321 in the plate surface direction of the battery main body 32 in the plurality of laminated batteries 3 are positioned on the inner portions of the pair of second frame portions 22. A plurality of positioning protrusions 223 for performing the above are provided adjacently in the stacking direction D. Further, in the positioning protrusions 223 provided on the inner portions of the pair of second frame portions 22, there are as many guide recesses 224 that guide the auxiliary portions 34 of the laminated battery 3 as in the stacking direction D. It is formed adjacent to.

As a result, the plurality of laminated batteries 3 are inserted into the insertion recess 222 at the left and right sides of the sheet container 31 and the auxiliary portion 34 of the sheet container 31 is inserted into the guide recess 224. The holding frame 2 can be held stably. In addition, the plurality of laminated batteries 3 are positioned in the pull-out direction H by the positioning protrusions 223 and positioned in the left-right direction W by the inner ends 225 of the pair of second frame portions 22. Each laminated battery 3 supports its four corners 321 by positioning projections 223, so that the positions of the electrodes 33A and 33B, particularly the lead-out direction H of the electrodes 33A and 33B and the direction perpendicular thereto are fixed. The
Therefore, according to the laminated battery structure 1 of the present example, a plurality of laminated batteries 3 can be stably held with their positions fixed.

DESCRIPTION OF SYMBOLS 1 Laminated battery structure 11 Connection battery group 2 Holding frame 21 1st frame part 22 2nd frame part 222 Insertion recessed part 223 Positioning projection part 225 Inner end 25 Fitting part 3 Laminated battery 31 Sheet-like container 310 Sheet end part 32 Battery Main body 321 Corner 33A, 33B Electrode 34 Auxiliary part 4 Connection bus bar A Cooling air

Claims (5)

A flat battery body is accommodated in a flexible sheet-like container, and a plurality of laminated batteries are stacked in the stacking direction in which a pair of sheet-like electrodes are drawn from the battery body to the outside of the sheet-like container. And
The laminated battery in which the plurality of sheets are laminated is held in a resin holding frame,
On the four sides of each laminated battery, a sheet end formed by projecting the end of the sheet container outward from the battery body is formed.
The holding frame is formed by forming a plurality of insertion recesses into which the sheet end portion is inserted adjacent to each other in the stacking direction on at least an inner portion of the frame portions facing each other among the four frame portions. A plurality of positioning projections for positioning the four corners in the plate surface direction of the battery body in the plurality of laminated batteries are adjacent to at least an inner portion of the frame portions facing each other among the frame portions in the stacking direction. name provided Te is,
The plate surface direction includes a drawing direction in which the electrode is drawn out from the battery body perpendicular to the stacking direction, and a left-right direction orthogonal to the drawing direction and the stacking direction,
The sheet-like container has an auxiliary part that is smaller than the thickness of the part that accommodates the battery body by forming a gap between the electrode and the electrode at an outer position in the extraction direction with respect to the part that accommodates the battery body. Have
The positioning protrusion is formed adjacent to the corner of the battery body and facing the auxiliary part,
The positioning protrusion guides the side of the battery body in the pull-out direction so that the battery main body is positioned in the pull-out direction, and the inside of the frame portion positioned on both sides of the holding frame in the left-right direction. The laminated battery structure according to claim 1, wherein the battery body is positioned in the left-right direction by guiding an end of the battery body in the left-right direction . The laminated battery structure according to claim 1, wherein the electrode is drawn from one side and the other side of the laminated battery,
All the electrodes drawn out from the one side are connected to face each other of the connecting bus bar on one side in a state of being parallel to each other, and all the electrodes drawn from the other side are In parallel with each other, it is connected facing the facing part of the other connecting bus bar,
A laminated battery structure characterized in that each of the connecting bus bars has a function of a cooling fin. A flat battery body is accommodated in a flexible sheet-like container, and a plurality of laminated batteries are stacked in the stacking direction in which a pair of sheet-like electrodes are drawn from the battery body to the outside of the sheet-like container. And
The laminated battery in which the plurality of sheets are laminated is held in a resin holding frame,
On the four sides of each laminated battery, a sheet end formed by projecting the end of the sheet container outward from the battery body is formed.
The holding frame is formed by forming a plurality of insertion recesses into which the sheet end portion is inserted adjacent to each other in the stacking direction on at least an inner portion of the frame portions facing each other among the four frame portions. A plurality of positioning projections for positioning the four corners in the plate surface direction of the battery body in the plurality of laminated batteries are adjacent to at least an inner portion of the frame portions facing each other among the frame portions in the stacking direction. name provided Te is,
A plurality of the holding frames are stacked in the stacking direction,
An insulating plate portion for ensuring insulation from the holding frame adjacent to the holding frame is provided on one end face in the stacking direction of the holding frame so as to face the electrode in the stacking direction. A laminated battery structure characterized by the above. A flat battery body is accommodated in a flexible sheet-like container, and a plurality of laminated batteries are stacked in the stacking direction in which a pair of sheet-like electrodes are drawn from the battery body to the outside of the sheet-like container. And
The laminated battery in which the plurality of sheets are laminated is held in a resin holding frame,
On the four sides of each laminated battery, a sheet end formed by projecting the end of the sheet container outward from the battery body is formed.
The holding frame is formed by forming a plurality of insertion recesses into which the sheet end portion is inserted adjacent to each other in the stacking direction on at least an inner portion of the frame portions facing each other among the four frame portions. A plurality of positioning projections for positioning the four corners in the plate surface direction of the battery body in the plurality of laminated batteries are adjacent to at least an inner portion of the frame portions facing each other among the frame portions in the stacking direction. name provided Te is,
The holding frame is assembled by fitting the four frame parts formed separately into the fitting parts provided on the holding frame,
The four frame parts are composed of a pair of first frame parts located in the lead-out direction of the electrode and a pair of remaining second frame parts,
The positioning protrusions are provided on both sides in the pull-out direction in the inner portions of the pair of second frame portions,
The positioning protrusion guides the side of the battery body in the laminated battery in the pull-out direction, and guides the remaining side of the battery body in the laminated battery by the inner ends of the pair of second frame parts. A laminated battery structure characterized by being configured as described above .   The laminated battery structure according to any one of claims 1 to 4, wherein the laminated battery structure is for vehicle use.

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