JP2011151013A - Single battery, and battery pack using the single battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a single battery of which a battery pack can be formed by coupling by a simple and easy method, and to provide a battery pack superior in cooling characteristics wherein single batteries are surely fixed, and furthermore it is possible to increase a contact area between the single battery and cooling medium such as outside air. <P>SOLUTION: A storage battery is constituted of: a single battery; a battery jar case 11; and coupling members 12 each having a length somewhat longer than a short side width length of the battery jar case 11 and a through-hole 12a, which are adhered to both the short side faces of the battery jar case 11 in a body. Here, a power generating unit is housed in the battery jar case 11, and output terminals are prepared. Moreover, these single batteries are aligned in parallel and pinched by end plates 20 to form the battery pack 10 having spaces 4 for passing a cooling medium through, which are fastened and fixed by coupling rods 21. A single battery or a battery pack may be constituted by aligning the single battery or the single batteries by forming protruded and recessed parts on their side faces using spacers (5, 6) to set coupling members. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a single battery and a so-called module battery (hereinafter referred to as a single battery and an assembled battery) that is formed by connecting the single batteries.

  When manufacturing a single cell and an assembled battery using the single cell, it is necessary to consider a spacer that allows a cooling medium (for example, air) to pass between the cells. As a secondary battery module in consideration of the cooling ability that allows a conventional cooling medium to pass through, a battery partition is alternately arranged between a number of single cells to maintain the partition distance, and a flat plate in which fastening members are formed on the outermost sides on both sides. There is disclosed a secondary battery module in which an end plate is arranged and fixed to the fastening member through a fastening rod, and a single cell fixing end plate applied thereto (Patent Document 1).

JP 2006-156392 A

  When unit cells are connected to form a module (assembled battery), it is necessary to consider cooling properties, and in particular, it is necessary to consider a space for passing a cooling medium between the cells. In addition, examples of the “cooling medium” in the specification of the present application include gaseous and liquid fluids such as air, oil, and fluorine-based incombustible liquid. For example, it is conceivable to form an assembled battery by disposing a frame body in which guides are formed so as to form a predetermined space at the upper and lower portions. However, the upper part which is the terminal surface of the battery is a convenient part for arranging the state detection circuit of each unit cell for the convenience of wiring, and since the connection between terminals is also made, these Ingenuity is required to design an upper frame body that can securely fix the battery while ensuring a certain space between the batteries within the constraints and to make an assembled battery.

  Alternatively, there is a method in which end plates are arranged at both ends of the side surface of the assembled battery, and both ends are fastened and clamped through rods (connecting rods) in through holes provided in the end plate. There was a risk that the cells would be misaligned due to vibration or mechanical shock. Although it is conceivable to use a frame with a guide in order to prevent the positional deviation of the unit cell, there is a problem that the covering area by the forming member of the assembled battery increases and the cooling property of the battery is impaired.

  In addition, in an assembled battery in which a plurality of unit cells are connected side by side, members used for the connection, for example, the end plate and the rod (connecting rod) are all worn and destroyed by long-term vibration and impact. There's a problem.

  The present invention has been made in consideration of such circumstances, and the object of the present invention is to provide a unit cell that can be assembled into a battery by connecting them in a simple manner, while ensuring a predetermined space between the batteries. An object of the present invention is to provide an assembled battery having excellent cooling performance, in which a unit cell is securely fixed and a contact area between the unit cell and outside air can be increased.

  Non-aqueous electrolyte batteries have the feature of superior energy density compared to water-based batteries, but non-aqueous electrolyte batteries have lower thermal conductivity than water-based batteries. It is necessary to do enough. Further, the assembled battery according to the present invention is preferably applied to a non-aqueous electrolyte battery because it can maximize the characteristics of the non-electrolyte battery in terms of energy density.

  In order to cope with the above-mentioned problem, the present invention according to claim 1 is characterized in that a power generation element is accommodated in a battery case (11), an output terminal (2, 3) is provided above, and the battery case is provided. A cell (1) characterized in that a connecting member (12) provided with a through hole (12a) longer than the width of the short side surface is arranged on the short side surface (11a) of the case (11). It is characterized by.

  Further, the invention according to claim 2 is that the power generation element is accommodated in the battery case (11), the output terminal (2, 3) is provided above, and the short side surface of the battery case (11) A plurality of unit cells (1) provided with a connecting member (12) provided with a through hole (12a) longer than the width of the short side surface (11a) are arranged in parallel, and the through hole (12a) of the connecting member (12) is arranged. ) Is connected to the connecting rod (21), and the plurality of single cells (1) are integrally fastened.

  Further, the invention according to claim 3 is that the power generation element is accommodated in the battery case (11), the output terminal (2, 3) is provided above, and both short side surfaces of the battery case (11) ( 11a) is a unit cell in which a connecting member (13) having the same width as that of the short side surface is disposed, and fitting means are provided on both side surfaces of the connecting member (13). .

  In addition, the invention according to claim 4 is that the power generation element is accommodated in the battery case (11), the output terminal (2, 3) is provided above, and both short side surfaces of the battery case (11) ( 11a) includes a plurality of unit cells (1) having connecting members (13) having the same width as the short side surfaces and fitting means on both side surfaces of the connecting members (13). The battery pack is a space between the unit cells adjacent to each other along the long side surface of the battery case (11), the end of which is fitted into the fitting means, and the space through which airflow can pass ( 4) is an assembled battery.

  The connecting member may be arranged at two or more locations on the short side surface. If it does in this way, the load of the vibration and impact concerning a connection member can be disperse | distributed by the number of connection members. An assembled battery using a single battery having such a connecting member can improve safety against long-term vibration and impact.

  The connecting member may have a U-shaped structure that covers both ends of the short side surface. The connecting member may have an annular structure that covers the entire outer periphery of the battery case around the vertical axis. In any configuration, a part of the battery case in the vertical axis direction may be exposed without being covered with the connecting member. If it does in this way, while a battery case can be protected by a connection member, joining with a battery case can be strengthened more. An assembled battery using a single battery having such a connecting member can improve safety against long-term vibration and impact.

  The single battery of the present invention can provide a single battery that can be connected or fastened to form an assembled battery by a simple method. Moreover, it can be set as the assembled battery which fixed the single cell reliably, ensuring a predetermined space between batteries. Furthermore, since the assembled battery of this invention can enlarge the contact area of a cell and a cooling medium, it can be set as the assembled battery excellent in cooling property.

  The connecting means can be connected by fitting via a spacer into fitting portions (concave portions, convex portions, etc.) provided on both end faces of the connecting member, and a space in which the cooling medium can flow between the batteries can be provided. Further, since the connecting rod is fastened to the through hole provided in the connecting member (or both are used together), no positional deviation occurs.

  In addition, the assembled battery using the single battery of the present invention is connected or fastened by passing the connecting rod through the through hole, or uses a fitting connecting member and a spacer, and is connected or fastened by the connecting rod. It is possible to cope with a large environmental load such as the above. Furthermore, according to the present invention, since the fastening is performed using the side surfaces, the upper portion with the terminals does not get in the way and can be assembled compactly as a whole.

It is a perspective view of 1st Embodiment of the cell which concerns on this invention. It is a side view of one side of the 1st implementation of the cell concerning the present invention. It is a perspective view in the middle of arranging the unit cells of the 1st embodiment of the present invention into an assembled battery. FIG. 4A is a front view as viewed in the direction of arrow P in FIG. 3, and FIG. 4B is an enlarged view of a portion X in FIG. It is the whole perspective view which assembled the unit cell of the 1st Embodiment of this invention as a battery assembly. It is a perspective view of the battery case which attached the connection member of 2nd Embodiment of the cell of this invention. It is a side view of the battery case of 2nd Embodiment of the cell of this invention. It is a perspective view of the whole cell of the state which attached the spacer used in 2nd Embodiment of the cell of this invention. It is a whole perspective view in the middle of making a cell into an assembled battery in a 2nd embodiment of a cell of the present invention. FIG. 10A is a front view as viewed in the direction of arrow P in FIG. 9, and FIG. 10B is an enlarged view of the Y part in FIG. 10A. It is a whole perspective view of the state which assembled the single battery of the 2nd Embodiment of this invention as an assembled battery. It is a perspective view of the battery case which attached the connection member of 3rd Embodiment of the cell of this invention. It is a side view of the battery case of the 3rd Embodiment of this invention. FIG. 14A is a perspective view of a spacer used in the second embodiment. FIG. 14B is a plan view of a spacer used in the third embodiment of the present invention, and FIG. 14C is a side view of the spacer used in the third embodiment of the present invention. 14 (D) is a front view of a spacer used in the third embodiment of the present invention, and FIG. 14 (E) is an overall perspective view of the spacer used in the third embodiment of the present invention. It is a perspective view of the cell of the state which attached the spacer of 3rd Embodiment of the cell of this invention. In 3rd Embodiment of the cell of this invention, it is a perspective view in the middle of the assembly in the case of uniting the cell equipped with the spacer in parallel, and making it an assembled battery. FIG. 17A is a front view as viewed in the direction of arrow P in FIG. 16, and FIG. 17B is an enlarged view of a Z portion in FIG. It is a whole perspective view of the state which assembled the single battery of the 3rd Embodiment of this invention as an assembled battery. It is a perspective view of the battery case which attached the connection member used by 4th Embodiment of the cell of this invention. It is a side view of the battery case of 4th Embodiment of the cell of this invention. It is a perspective view in the middle in the case of making the cell of 4th Embodiment of the cell of this invention into an assembly assembled battery. FIG. 22A is a front view as viewed in the direction of arrow P in FIG. 21, and FIG. 22B is an enlarged view of a W portion in FIG. 22A. It is a whole perspective view of the assembled battery which assembled the cell of 4th Embodiment of the cell of this invention in parallel. FIG. 24 is a perspective view of a cell according to a fifth embodiment of the present invention, and FIG. 24A shows a cell having two connecting members arranged on the short side surface of the cell according to the first embodiment. FIG. 24 (B) is a perspective view of a unit cell in which three connecting members are arranged on the short side surface of the unit cell of the first embodiment, and FIG. 24 (C) is a diagram of the first embodiment. It is a perspective view of the cell which arranged four connection members on the short side of a cell. FIG. 25 is a perspective view of a unit cell according to a sixth embodiment of the present invention, FIG. 25A is a perspective view of the unit cell of the sixth embodiment, and FIG. It is the top view which looked at the cell of embodiment of the above from the upper part. FIG. 26 is a perspective view of a cell according to a seventh embodiment of the present invention, FIG. 26A is a perspective view of the cell of the seventh embodiment, and FIG. It is the top view which looked at the cell of embodiment of the above from the upper part.

(First embodiment)
FIG. 1 is a perspective view of a battery case of a first embodiment of a cell 1 of the present invention, and FIG. 2 is a side view.
As shown in FIG. 1 and FIG. 2, the cell 1 is integrally bonded to a metal battery case 11 and both sides of the short side surface of the battery case 11, and the width (L 1) of the battery case 11. The connecting member 12 is slightly longer (L2). The connecting member 12 is provided above and below the short side surface of the battery case 11 made of aluminum or the like. The connecting member 12 is provided with a through hole 12a. When a large number of single cells are assembled, the connecting member 12 is assembled through a connecting rod 21 (bolts, etc., see FIG. 5). In this case, the integration of the battery case 11 and the connecting member 12 is preferably injection molding. When integrating by such injection molding, the short side surface of the battery case 11 is provided with minute irregularities on the surface so that the resin of the connecting member 12 injection-molded on the metal battery case 11 can be easily adhered. To be. The unit cell 1 is one unit cell provided with a power generation element and output terminals 2 and 3. The battery case 11 may be made of not only a metal such as an aluminum alloy but also a synthetic resin. However, when the battery case 11 is a synthetic resin, the battery case 11 is bonded to the connecting member 12 with an adhesive. In addition, even if it is a metal battery case, you may adhere | attach with the connection member 12 with an adhesive agent.

  FIG. 3 is a perspective view in the middle of arranging the single cells to form an assembled battery. FIG. 4 (A) is a front view taken along arrow P in FIG. 3, and FIG. 4 (B) is an enlarged view of a portion X in FIG. It is. FIG. 5 is an overall perspective view assembled as an assembled battery. As shown in these drawings, a space (gap) 4 is formed between the single cell 1 and the single cell 1 by the connecting member 12. These spaces 4 serve as passages for the cooling medium when the unit cell 1 rises in temperature, and thus serve to prevent the unit cell 1 from overheating. Further, as shown in FIG. 5, when the single cells 1, 1,... Are arranged in parallel, the connecting rod 21 is passed through the through hole 12 a of the connecting member 12, and the end plates 20, 20 and the connecting rod 21 are assembled, The battery pack 10 has a space 4 that passes therethrough. Note that the end plate 20 may not be used.

  The space between single cells is preferably 1 mm or more and 3 mm or less. It is preferable to set the space between the single cells to 1 mm or more because the cooling effect by the cooling medium can be made sufficient. In addition, it is preferable to set the space between the single cells to 3 mm or less because the possibility that the energy density of the assembled battery due to the provision of the space is reduced can be suppressed.

  In the embodiment of the present invention, the space between the unit cell and the unit cell is 2 mm, but the space (interval) 4 between the unit cell 1 and the unit cell 1 is the same as that of the battery case 11. When arranged, the battery case 11 is formed by a gap formed by contact between the connecting members 12 slightly longer than the short side surface. For example, when the space is 2 mm, the width length (L2) of each connecting member 12 may be 2 mm longer than the width of the metal case 11. That is, it projects by 1 mm to the left and right of the short side surface of the battery case 11, and a space of 2 mm is formed when it comes into contact with the projecting portion of the adjacent connecting member 12.

  In the above embodiment, the width of the entire connecting member is the same as the length of the through hole. However, the embodiment of the connecting member 12 provided with the through hole longer than the width of the short side surface is not limited thereto. For example, the width of the main portion of the connecting member 12 is the same as the width of the short side surface of the battery case, but only the periphery of the through hole extends from the main portion of the connecting member 12 in the width direction of the short side surface. It is good also as an aspect which did.

(Second Embodiment)
FIG. 6 is a perspective view of the battery case 11 to which the connecting member of the second embodiment of the unit cell of the present invention is attached, and FIG. 7 is the battery case to which the connecting member of the second embodiment is attached. FIG. 8 is a side view, and FIG. 8 is a perspective view of the entire unit cell with a spacer used in the second embodiment of the unit cell of the present invention. FIG. 9 is an overall perspective view in the middle of using a single battery as an assembled battery. FIG. 10A is a front view as viewed in the direction of arrow P in FIG. 9, and FIG. 10B is an enlarged view of the Y part in FIG. 10A. FIG. 11 is an overall perspective view of a state in which the unit cell according to the second embodiment of the present invention is assembled as the assembled battery 10.

  In the second embodiment, a connecting member 13 having the same width as that of the short side surface 11a of the battery case 11 serving as the single cell is bonded to the unit cell at the center of both sides of the short side surface 11a. As described above, the bonding of the connecting member 13 is preferably performed by injection molding when integrated by bonding. However, in the case of injection molding, the battery case 11 is provided with minute irregularities on the short side surface 11a of the battery case 11. It is preferable that the resin of the connecting member 13 which is injection-molded is easily adhered. Further, on the both side surfaces of the connecting member 13, several convex portions 13 a are provided as fitting means. The convex portion 13a is fitted into holes 5a provided at both ends of the spacer 5 described later. That is, as shown in FIGS. 6 and 7, when the convex portion 13 a is fitted into the hole 5 a formed at both ends of the spacer 5, the spacer 5 is attached. In this way, as shown in FIG. 8, the spacer 5 is disposed on the connecting member 13 of the battery case 11, the power generation element is accommodated, and the output terminals 2 and 3 from the electrodes are provided to form the unit cell 1.

  When the unit cell 1 is an assembled battery, as shown in FIG. 9, when a plurality of unit cells 1 are connected by a connecting member and a spacer 5, the unit cell 1 and the unit cell are connected as shown in FIG. A spacer 5 is disposed between the first and second spacers 1 and a space 4 is formed as shown in FIG. This space (space) 4 serves as a passage for the cooling medium and has a function of cooling the unit cell 1 whose temperature has risen. Thus, as shown in FIG. 11, the connecting rod 13 is fitted into the hole 5a of the spacer 5, and is clamped between the end plates 20 and 20 at both ends and passed through the vicinity of the unit cell. , 21 to form an assembled battery 10. According to this configuration, the battery pack is solid, and the unit cell is not displaced due to vibration or mechanical shock.

  In addition, the pressure on the battery can be adjusted by adjusting the tightening torque of the connecting rod. If importance is attached to prevention of an increase in the compression force and a decrease in the gap, the tightening may be weakened. Since the connecting member and the spacer are only connected by fitting, when stress is applied, the fitting is loosened to relax the stress or secure a gap. Prevention is ensured.

(Third embodiment)
FIG. 12 is a perspective view of a battery case to which the connecting member of the third embodiment of the cell of the present invention is attached, and FIG. 13 is a side view of the battery case of the third embodiment of the present invention. is there. 14A is a perspective view of the spacer 5 used in the second embodiment, and FIG. 14B is a plan view of the spacer 6 used in the third embodiment. FIG. ) Is a side view, FIG. 14 (D) is a front view, and FIG. 14 (E) is a perspective view of a spacer 6 used in the third embodiment. In the embodiment of the present invention, as in the second embodiment, a connecting member 14 having substantially the same width as the short side surface 11a of the battery case 11 is bonded to the battery case 11 of the unit cell 1. .. Are provided at predetermined intervals as fitting means on both sides of the connecting member 14, and a spacer 6 is disposed between the unit cell 1 and the unit cell 1. The concave portions 14a, 14a,... On both sides of these connecting members 14 are provided with convex portions 6a, 6a,... That are connected to both unit cells 1 when the unit cells 1 are arranged in parallel. The spacer 5 and the spacer 6 are fitting means for the connecting members 13 and 14.

  In this third embodiment, a connecting member 14 having the same width as that of the short side surface 11a of the battery case 11 serving as the single cell is bonded to the unit cell at the center of both sides of the short side surface 11a. The bonding of the connecting member 14 is preferably performed by injection molding when integrated by bonding. However, even in the case of injection molding, the short side surface 11a of the battery case 11 is provided with minute irregularities and is injection molded into the metal case 11. It is preferable that the resin of the connecting member 14 be easily adhered. Further, several concave portions 14 a are provided on both side surfaces of the connecting member 14. The concave portion 14 a is configured to fit convex portions 6 a provided at both ends of the spacer 6. As shown in FIG. 15, the unit cell 1 accommodates a power generation element and is provided with output terminals 2 and 3. That is, as shown in FIGS. 14B to 14E, when the convex portions 6a projecting from both ends of the spacer 6 are fitted into the concave portions 14a, the unit cell 1 has the spacer 6 mounted thereon. Become. And if the convex part 6a of the spacer 6 is assembled in parallel so that it may fit in the concave part 14a of the connection member 14, it will become one assembled battery 10. FIG.

  FIG. 15 is a perspective view of the unit cell 1 with the spacer 6 attached, and FIG. 16 is a perspective view in the middle of assembly when the unit cells 1 to which the spacer 6 is attached are stacked in parallel to form an assembled battery. FIG. 17 (A) is a front view as viewed in the direction of arrow P in FIG. 16, and FIG. 17 (B) is an enlarged view of a Z portion in FIG. 17 (A). That is, when a power generation element is accommodated in a metal case (battery case) 11, output terminals 2 and 3 are provided, and a spacer 6 is installed around the battery case 11, a single cell is obtained. However, about the single cell used as the edge part of an assembled battery, it is good also as what does not provide the spacer 6 in one side. Thus, a space (space) 4 is formed between the single cell 1 and the single cell 1 by the spacer 6. These spaces (spaces) 4, 4,... Serve as a cooling medium passage when the temperature of the unit cell as an assembled battery rises, and have a function of cooling the overheated unit cell 1.

  FIG. 18 is an overall perspective view of a state where the unit cell according to the third embodiment of the present invention is assembled as the assembled battery 10, and as shown in this figure, the convex portion of the spacer 6 is formed in the concave portion 14a of the connecting member 14. 6a is fitted, unit cells are juxtaposed, and are sandwiched between end plates 20 and 20 at both ends, and tightened and assembled through bolts 21 and 21 of connecting rods in the vicinity of the unit cell to form an assembled battery. According to this configuration, the battery becomes a solid assembled battery, and the unit cell is not displaced due to mechanical impact such as vibration.

  In addition, the pressure on the battery can be adjusted by adjusting the tightening torque of the connecting rod. If importance is attached to prevention of an increase in the compression force and a decrease in the gap, the tightening may be weakened. Since the connecting member and the spacer are only connected by fitting, when stress is applied, the fitting is loosened to relax the stress or secure a gap. Prevention is ensured.

(Fourth embodiment)
Next, FIG. 19 is a perspective view showing a state in which a connecting member is attached to the battery case of the fourth embodiment of the unit cell of the present invention, and FIG. 20 is a side view thereof.
As shown in these drawings, in this embodiment, the connecting members 15 are bonded and integrated on both sides of the central portion of the short side surface of the battery case 11. In this case, the connecting member 15 includes an end connecting member 15a provided with a through hole 15c and arranged vertically, and a concave portion 15d as a fitting means for the space 6 on the side surface, and is arranged between the upper and lower connecting members 15a. And the middle connecting member 15b. The metal case (battery case) 11 and the connecting member 15 are integrated by resin molding by injection molding, but the adhesion between the metal case (battery case) side surface 11a and the connecting member 15 is the first to third. This is the same as the embodiment.

  The through hole 15c of the end connecting member 15a is for penetrating the connecting rod (bolt) 21, and the recess 15d of the middle connecting member 15b is provided at both ends of the spacer 6 (see FIGS. 14B to E). This is for fitting the convex portion 6a. And the power generation element is accommodated in the battery case 11, the output terminals 2 and 3 are provided and covered, and the spacers 6, 6,. In this embodiment, the connecting member 15 can reduce the number of parts when the middle connecting member 15b having the fitting portion and the end connecting member 15a having the through hole are integrated, but these end connecting members can be reduced. 15a and the middle connecting member 15b may be integrated or separate. Moreover, when it integrates, the positional relationship of a fitting part and a penetration part is free. From the viewpoint of fastening effect and energy density, it is preferable to arrange the through hole 15c as close to the battery as possible. Furthermore, if a spacer (5, 6) having a predetermined thickness that can be fitted to a fitting type connecting member is used, the inter-battery space can be changed.

  FIG. 21 is a perspective view in the middle of the case where the unit cell 1 is an assembled battery, FIG. 22 (A) is a front view as viewed in the direction of arrow P in FIG. 21, and FIG. 22 (B) is FIG. FIG. When the unit cell 1 according to the fourth embodiment of the present invention is assembled into an assembled battery, as shown in FIG. 21, the unit cells 1, 1,... Are arranged in parallel, and the connecting member 15b and the adjacent connecting member 15b. Assemble the spacer 6 between the two.

  The space (gap) between the unit cell 1 and the unit cell 1 is a space (gap) 4 formed by contact between the connecting members 15a slightly longer than the short side surface of the case 11 when the battery case 11 is arranged. 4... For example, when the space 4 is 2 mm, the width of each connecting member 15a may be 2 mm longer than the unit cell (case). That is, it protrudes by 1 mm to the left and right of the short side surface of the battery case 11, and a space of 2 mm is formed when it comes into contact with the protruding portion of the adjacent connecting member 15a. In this case, as shown in FIGS. 22 (A) and 22 (B), if a spacer 6 that can be installed between the single cell 1 and the single cell 1 is disposed, a space (gap) 4 is formed. When used as an assembled battery, when the temperature of the unit cell rises, the spaces (gap) 4, 4,... Serve as a passage for the cooling medium and has a function of cooling each unit cell 1. Further, these spacers 6, 6,... Are solid as assembled batteries and can cope with vibrations and mechanical shocks.

  In the fourth embodiment, as in the third embodiment, in addition to being able to adjust the compression force on the batteries by adjusting the torque pressure of the fastening of the connecting rods, the diameter of the connecting rods can be adjusted between the single cells. The connection strength can be adjusted. In other words, if a connecting rod having a diameter slightly smaller than the diameter of the through hole of the connecting member is selected, the connecting member and the connecting rod will slide better, so that when stress is applied, the fitting of the connecting member will loosen. To do. Thus, stress is relaxed or clearance is secured, while prevention of displacement is ensured by tightening both ends of the connecting rod.

  FIG. 23 is an overall perspective view of the assembled battery 10 in which a plurality of unit cells 1 are assembled in parallel. As shown in this figure, 15a and 15a of the connecting member 15 are brought into contact with each other, the convex portion 6a of the spacer 6 is fitted into the concave portion 15d of 15b, sandwiched between the end plates 20 and 20 at both ends, and the upper and lower connecting portions are connected. When assembled by tightening the connecting rod (bolts 21, 21) in the through hole 15c of the member 15a, an assembled battery is obtained. According to this configuration, the battery is firmly assembled, and the unit cell is not displaced due to vibration or mechanical shock. Note that the end plate 20 may not be used.

(Fifth embodiment)
FIG. 24 is a perspective view of a fifth embodiment of a unit cell according to the present invention. FIG. 24A is a perspective view of a unit cell in which two connecting members are arranged on the short side surface of the unit cell of the first embodiment, and FIG. 24B is a diagram of the unit cell of the first embodiment. FIG. 24C is a perspective view of a unit cell in which three connection members are arranged on the short side surface, and FIG. 24C is a perspective view of the unit cell in which four connection members are arranged on the short side surface of the unit cell of the first embodiment. is there. The unit cell of the fifth embodiment is a configuration in which two or more connecting members having through holes on the short side surface are arranged in the first embodiment or the fourth embodiment, and the other configurations are as follows. Mainly the same as the first embodiment or the fourth embodiment. Specifically, as shown in FIGS. 24 (A) to 24 (C), in the cell 1 of the first embodiment, two output terminals 2 and 3 are arranged at the upper end of the battery case 11, The connecting members 12 having the through holes 12a on the short side surface 11a of the battery case 11 are arranged at two places (FIG. 24A), three places (FIG. 24B), and four places (FIG. 24C), respectively. Has been configured. In FIGS. 24B and 24C, the connecting members 12 are arranged at equal intervals on the short side surface 11a. However, the intervals may be arbitrarily changed as appropriate. When the configuration other than the connection member is the same as that of the fourth embodiment, the unit cell 1 is provided with the middle connection member 15b between the end connection members 15a. In FIG. 24, the arrangement of up to four connecting members is illustrated, but the short side surface of the battery case or the dimensions of the connecting members may be adjusted to arrange five or more connecting members.

  When the unit cells of the fifth embodiment are arranged side by side and the assembled battery is assembled as shown in FIG. 3 or FIG. 21, the assembled battery distributes the burden of vibration and shock applied to the connecting member according to the number of connecting member placement locations. Therefore, the life of the connecting member is improved, and as a result, the safety of the assembled battery against long-term vibration and impact is improved.

(Sixth embodiment)
FIG. 25 is a perspective view of a sixth embodiment of a unit cell according to the present invention. FIG. 25A is a perspective view of the cell of the sixth embodiment, and FIG. 25B is a top view of the cell of the sixth embodiment as viewed from above. The unit cell of the sixth embodiment is obtained by mainly changing the shape of the connecting member in the first embodiment or the fourth embodiment, and other configurations are the same as those of the first embodiment. Or it is the same as that of 4th Embodiment. In the cell 1 of the sixth embodiment, two output terminals 2 and 3 are arranged at the upper end of the battery case 11, and a strip-shaped connecting member 16 having a through hole 16 a on the short side surface 11 a of the battery case 11. Are arranged in two places. As shown in FIG. 25B, the connecting member 16 is formed in a U-shape when viewed from above. When the connecting member 16 is formed in this manner, both ends of the short side surface of the battery case 11 can be protected by the connecting member 16 and the bonding between the battery case 11 and the connecting member 16 can be made stronger. it can. Then, by arranging the cells of the sixth embodiment and assembling the assembled battery as shown in FIG. 3 or FIG. 21, safety against long-term vibration and impact of the assembled battery can be improved. Note that the cell of the sixth embodiment may be configured by arranging two or more connecting members on the short side surface in the same manner as in the fifth embodiment.

(Seventh embodiment)
FIG. 26 is a perspective view of a cell according to a seventh embodiment of the present invention, FIG. 26A is a perspective view of the cell of the seventh embodiment, and FIG. It is the top view which looked at the cell of embodiment of the above from the upper part. The unit cell of the seventh embodiment is the one in which the shape of the connecting member is mainly changed in the first embodiment or the fourth embodiment, similarly to the sixth embodiment. The configuration of is the same as that of the first embodiment or the fourth embodiment. In the cell 1 according to the seventh embodiment, two output terminals 2 and 3 are arranged at the upper end of the battery case 11, and a strip-shaped connecting member 17 having a through hole 17 a on the short side surface 11 a of the battery case 11. Are arranged in two places. As shown in FIG. 26 (B), the connecting member 17 is formed in an annular shape when viewed from above. When the connecting member 17 is formed in this manner, the entire outer periphery around the vertical axis of the battery case 11 can be protected by the connecting member 17 and the bonding between the battery case 11 and the connecting member 17 can be made stronger. Can do. When the cells of the seventh embodiment are arranged and the assembled battery is assembled as shown in FIG. 3 or FIG. 21, safety against long-term vibration and impact of the assembled battery can be improved. Note that the cell of the seventh embodiment may be configured by disposing two or more connecting members on the short side as in the fifth embodiment.

  The above-described embodiments of the present invention are not limited to the above examples, and various modifications can be made. For example, the shape of the connecting member is not limited to a hexagon but may be a kamaboko shape. Further, the connecting member (12, 13, 14, 15, etc.) may be a resin material or a metal as long as it can be fastened or fitted and fixed. The assembled batteries shown in the embodiments of the present invention all show end plates at both ends, but in the assembled battery of the present invention, whether or not to use the end plates is appropriately selected depending on the application and required strength. can do.

DESCRIPTION OF SYMBOLS 1 Unit cell 2, 3 Output terminal 4 Space 5, 6 Spacer 10 Battery assembly 11 Battery case, such as metal (synthetic resin) 11a Short side surface 12 Connection member 12a Through-hole 13 Connection member 14 Connection member 15 Connection member 15a End connection Member 15b Middle connection member 15c Through hole 15d Recess 16 Connection member 16a Through hole 17 Connection member 17a Through hole 20 End plate 21 Connection rod

Claims (10)

  A power generation element is accommodated in the battery case, and an output terminal is provided above, and a connecting member provided with a through hole longer than the width of the short side surface is disposed on the short side surface of the battery case. Single cell to play.   A plurality of unit cells in which a power generation element is accommodated in a battery case, provided with an output terminal above, and a connecting member provided with a through hole longer than the width of the short side surface is provided on the short side surface of the battery case. A battery assembly in which the plurality of unit cells are integrally fastened in parallel, with a connecting rod penetrating through the through hole of the connecting member.   A power generation element is accommodated in the battery case, provided with an output terminal on the upper side, and on both short side surfaces of the battery case, a connection member having the same width as the width of the short side surface is disposed, and the connection member A unit cell comprising fitting means on both side surfaces.   A power generation element is accommodated in the battery case, provided with an output terminal on the upper side, and on both short side surfaces of the battery case, a connection member having the same width as the width of the short side surface is disposed, and the connection member An assembled battery comprising a plurality of unit cells each provided with a fitting means on both side surfaces, and between the adjacent unit cells, along the long side surface of the battery case, and the end portion is fitted to the fitting means. A battery pack characterized in that a space through which airflow can pass is formed. The unit cell according to claim 1 or 3, wherein the connecting member is arranged at two or more locations on the short side surface. The assembled battery according to claim 2 or 4, wherein the connecting member is arranged at two or more locations on the short side surface. 6. The unit cell according to claim 1, wherein the connecting member has a U-shaped structure covering both ends of the short side surface. The assembled battery according to any one of claims 2, 4, and 6, wherein the connecting member has a U-shaped structure covering both ends of the short side surface. The said connection member is one or more annular structures which cover the whole outer periphery of the said battery case in the shape of a belt | belt around a vertical axis | shaft, The any one of Claim 1, 3 and 5 characterized by the above-mentioned. The single battery according to item 1. The said connection member is one or more annular structures which cover the whole outer periphery of the said battery case in the shape of a belt | belt around a vertical axis | shaft, The any one of Claim 2, 4 and 6 characterized by the above-mentioned. The assembled battery according to Item 1.

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