Battery pack

Abstract

The present invention provides a battery pack which has sufficient strength and rigidity, and is capable of suppressing an increase in the weight of the battery pack and improving the mounting efficiency of a rechargeable battery. A battery pack according to the present invention is characterized by being provided with: a laminated body in which a plurality of rechargeable batteries are laminated; a restraining member extending along a first surface of the laminated body in a lamination direction of the laminated body and restraining the plurality of rechargeable batteries; and a plurality of pressing members disposed in the lamination direction along the second surface of the laminate and supporting the laminate, each of the pressing members being disposed such that the pressing direction thereof faces a direction intersecting the lamination direction.

Description

Technical Field

[0001] The present invention relates to batteries. Background Art

[0002] From the perspective of climate-related disasters, in order to reduce CO2, the electrification of industrial machinery has been promoted, and research on rechargeable batteries has been conducted as energy sources in applications such as vehicles. Such rechargeable batteries (batteries) are stacked to form a rechargeable battery pack (battery module), and the battery module is mounted on a battery pack housing (battery pack casing) to form a battery pack. As such a battery pack, Patent Document 1 discloses a battery pack having a battery stack including a plurality of square batteries.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: International Publication No. 2019 / 151036

[0006] The battery pack case has structural members such as cross members and side members to ensure strength and rigidity, external force resistance, and to connect with the vehicle. The structural members contribute to the strength and rigidity of the battery pack case in the vehicle front-rear direction and the vehicle left-right direction.

[0007] However, the main purpose of the structural parts of the battery pack casing is to fix and protect the battery module. If the structural parts are used to ensure the strength and rigidity of the battery pack, the battery pack casing may become significantly heavier. In addition, since the structural parts of the battery pack casing occupy a part of the loading space of the rechargeable battery, it is required to improve the loading efficiency of the rechargeable battery. Summary of the invention

[0008] Problems to be solved by the invention

[0009] An object of the present invention is to provide a battery pack having sufficient strength and rigidity, which can suppress the increase in weight of the battery pack and improve the efficiency of mounting secondary batteries, and also contribute to the improvement of energy efficiency.

[0010] Methods used to solve problems

[0011] The present invention provides a battery pack, characterized in that:

[0012] The battery pack comprises:

[0013] A stacked body formed by stacking a plurality of rechargeable batteries;

[0014] a restraining member extending along a first surface of the stacked body in a stacking direction of the stacked body and restraining the plurality of rechargeable batteries; and

[0015] a pressing member, a plurality of which are arranged in the stacking direction along the second surface of the stacked body and support the stacked body,

[0016] Each of the pressing members is arranged so that its pressing direction is a direction intersecting the stacking direction.

[0017] Effects of the Invention

[0018] According to the present invention, it is possible to provide a battery pack which has sufficient strength and rigidity, can suppress an increase in the weight of the battery pack, and can improve the efficiency of mounting secondary batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a battery pack according to one embodiment.

[0020] Figure 2 This is a schematic diagram of a stacked body in which a plurality of secondary batteries according to one embodiment are stacked.

[0021] Figure 3 It is a schematic diagram of an AA cross section of a secondary battery according to one embodiment.

[0022] Figure 4 It is a schematic diagram of a battery module according to one embodiment.

[0023] Figure 5 It is a schematic diagram of a plurality of battery modules according to one embodiment.

[0024] Figure 6 is another schematic diagram of a plurality of battery modules according to an embodiment.

[0025] Figure 7 It is a schematic diagram of a battery module provided in a battery pack case according to one embodiment.

[0026] Description of reference numerals:

[0027] 100: rechargeable battery; 110: laminate; 111a, 111b: first surface; 112a, 112b: second surface; 113a, 113b: third surface; 120: component; 121a, 121b: positive electrode layer; 122: positive electrode active material layer; 123: positive electrode collector; 124a, 124b: negative electrode layer; 125: negative electrode active material layer; 126: negative electrode collector body; 127: electrolyte layer; 130a, 130b: lead terminals; 140a, 140b: collector terminals; 150: outer body; 200: restraining member; 300: battery pack casing; 310: extrusion component; 320: fluid passage; 400, 400a~400f: battery module; 410: battery module group; 500: battery pack casing; 600a, 600b: end plates. DETAILED DESCRIPTION

[0028] Hereinafter, the implementation mode will be described in detail with reference to the accompanying drawings. It should be noted that the following implementation mode does not limit the technical solution involved in the claims, and the feature combination described in the implementation mode is not necessarily required for the technical solution. Two or more of the multiple features described in the implementation mode can also be combined arbitrarily. In addition, the same or identical structures are marked with the same figure mark, and repeated description is omitted.

[0029] <Battery Pack According to the Present Embodiment>

[0030] The battery pack involved in this embodiment includes a stacked body formed by stacking a plurality of rechargeable batteries, a restraining member extending along the first surface of the stacked body in the stacking direction of the stacked body and restraining the plurality of rechargeable batteries, and a plurality of pressing members arranged along the second surface of the stacked body in the stacking direction and supporting the stacked body. In addition, each pressing member is configured such that its pressing direction is a direction intersecting the stacking direction. Thus, it is possible to have sufficient strength and rigidity, suppress the increase in weight of the battery pack, and improve the loading efficiency of the rechargeable batteries.

[0031] Figure 1 1 is a schematic diagram of a battery pack according to an embodiment. The battery pack 1000 can be mounted on an electric vehicle such as a hybrid vehicle or an EV (not shown), for example. The battery pack 1000 includes a rechargeable battery 100, a restraining member 200 for restraining the rechargeable battery 100, a battery pack case 300, a pressing member 310 provided on the battery pack case 300 and supporting the rechargeable battery 100, and a battery pack cover 500 for covering the rechargeable battery 100.

[0032] A plurality of rechargeable batteries 100 are stacked to form a stacked body 110. The stacked body 110 is restrained by a restraining member 200 extending in the stacking direction along a first surface thereof. The stacked body 110 and the restraining member 200 form a battery module 400. The plurality of battery modules 400 are stacked in a direction intersecting the stacking direction of the stacked body 110.

[0033] exist Figure 1 In the figure, the plurality of battery modules 400 are shown separated from the battery pack case 300 and the battery pack cover 500, and the plurality of battery modules 400 are supported by the pressing member 310 provided in the battery pack case 300 and covered by the battery pack cover 500 to form the battery pack 1000. In addition, the pressing member 310 is provided in plurality in the battery pack case 300, and is configured such that the pressing direction thereof is a direction intersecting the stacking direction of the stacked body 110. The respective structures of the rechargeable battery pack 1000 are described in sequence below.

[0034] (Rechargeable battery)

[0035] Figure 2 This is a schematic diagram of a stacked body in which a plurality of secondary batteries according to one embodiment are stacked. Figure 3 1 is a schematic diagram of an AA cross section of a rechargeable battery according to an embodiment. Figure 3 The structure of the rechargeable battery shown is arranged in an outer casing, such as Figure 2 As shown, the rechargeable battery 100 is in a substantially rectangular shape.

[0036] like Figure 2 As shown in FIG. 1 , a plurality of rechargeable batteries 100 are stacked in the thickness direction (Z direction) of the component 120 of the rechargeable battery 100 to form a stacked body 110 (battery stack). In addition, the rechargeable batteries 100 can be alternately stacked in the Z direction with insulating separators (not shown) in a state where they are arranged in a standing posture. The stacked body 110 is formed by stacking the rectangular rechargeable batteries 100 in the Z direction, and its overall appearance is a rectangular parallelepiped shape.

[0037] The number of rechargeable batteries 100 in the stack 110 is not particularly limited, and is set to 5 or more in one embodiment, 10 or more in another embodiment, 20 or more in another embodiment, 40 or more in another embodiment, 100 or less in one embodiment, 90 or less in another embodiment, 80 or less in another embodiment, and 60 or less in another embodiment.

[0038] The stacked body 110 has a first surface 111a (YZ surface) observed from the length direction (X direction) of the rechargeable battery 100, a second surface 112a (XZ surface) observed from the width direction (Y direction) of the rechargeable battery 100, and a third surface 113a (XY surface) observed from the thickness direction (Z direction) of the component 120 of the rechargeable battery 100. It should be noted that the stacked body 110 has a first surface 111a, a second surface 112a, a third surface 113a, and an opposing first surface 111b, a second surface 112b, and a third surface 113b, and each opposing surface has the same shape and size.

[0039] exist Figure 3 In the component 120 of the rechargeable battery 100 shown, the X direction indicates the extension and protrusion direction of the lead terminal, the Y direction indicates the direction orthogonal to the extension and protrusion direction of the lead terminal, and the Z direction indicates the stacking direction of the component 120 of the rechargeable battery 100. The X direction, the Y direction, and the Z direction are orthogonal to each other.

[0040] The structure of the rechargeable battery includes a component 120 of the rechargeable battery, a lead terminal 130, a collector terminal 140, and an outer casing 150 that wraps the component 120, and has a form suitable for a battery cell of a battery pack. The component 120 has a rectangular parallelepiped shape as a whole, and as shown in FIG. Figure 3 As shown in the figure, it includes two layers of positive electrode layers 121a, 121b and two layers of negative electrode layers 124a, 124b, and the positive electrode layer and the negative electrode layer have a two-layer structure. However, as the component 120, the positive electrode layer and the negative electrode layer can also be one layer, or three or more layers. A solid electrolyte layer 127 is provided between the positive electrode layer 121a and the negative electrode layer 124a, and between the positive electrode layer 121b and the negative electrode layer 124b.

[0041] The positive electrode layers 121a and 121b both include a positive electrode active material layer 122 and have a common positive electrode collector 123. The positive electrode collector 123 is disposed in a layer at the center of the component 120 in the Z direction, and each positive electrode active material layer is stacked on its front and back surfaces.

[0042] The negative electrode layers 124a and 124b are arranged on the outside of one side direction and the outside of the other side direction relative to the positive electrode layers 121a and 121b in the Z direction, and are stacked in a manner that the negative electrode layers 124a and 124b sandwich the positive electrode layers 121a and 121b. However, it is also possible to adopt a structure in which two layers of positive electrode layers sandwich two layers of negative electrode layers in contrast to the structure of this embodiment. The negative electrode layers 124a and 124b respectively include a negative electrode active material layer 125 and a negative electrode collector 126. Both negative electrode collectors 126 are formed in a layered state at the outermost layer of the constituent member 120.

[0043] Examples of active materials constituting the positive electrode active material layer 122 include lithium cobalt oxide, lithium nickel oxide, lithium manganese oxide, and lithium metal phosphate. Also, examples of active materials constituting the negative electrode active material layer 125 include lithium-based materials and silicon-based materials. Examples of lithium-based materials include Li metal and Li alloys. Examples of silicon-based materials include Si and SiO. Examples of active materials constituting the negative electrode active material layer 125 include carbon materials such as graphite, soft carbon, and hard carbon, tin materials (Sn, SnO, etc.), and lithium titanate.

[0044] The electrolyte layer 127 includes, for example, a solid, gel or liquid electrolyte having ion conductivity, and as its material, sulfide solid electrolyte materials, oxide solid electrolyte materials, nitride solid electrolyte materials, halide solid electrolyte materials, gel materials containing lithium salts or lithium ion conductive ionic liquids, etc. The positive electrode collector 123 and the negative electrode collector 126 are composed of metal foils, metal sheets or metal plates such as aluminum, copper, SUS, etc. The positive electrode active material layer 122, the negative electrode active material layer 125, and the electrolyte layer 127 can also be formed by combining the particles of the materials constituting them with a binder of an organic polymer compound system. In one embodiment, the rechargeable battery 100 can also be an all-solid-state battery.

[0045] The lead terminals 130a and 130b are connected to a charger or an electric load to charge or discharge the component 120. One end of the lead terminals 130a and 130b is located outside the outer casing 150, and the other end is located inside the outer casing 150.

[0046] The other ends of the lead terminals 130a and 130b are connected to the positive electrode collector 123 via the collector terminal 140a inside the outer casing 150, and the lead terminal 130a forms a terminal for the positive electrode. The lead terminal 130b and the collector terminal 140b are formed, for example, of a conductive metal sheet or metal plate. On the other hand, the other ends of the lead terminal 130b are connected to the negative electrode collector 126 via the collector terminal 140b inside the outer casing 150, and the lead terminal 130b forms a terminal for the negative electrode. The lead terminal 130b and the collector terminal 140b are formed, for example, of a conductive metal sheet or metal plate.

[0047] The arrangement of the lead terminals 130a and 130b is not particularly limited. The lead terminals 130a and 130b may be arranged at both ends of the rechargeable battery 100 in the length direction (X direction) or at one end (arranged at the top) of the rechargeable battery 100 in the width direction (Y direction).

[0048] (Battery Module)

[0049] Figure 4 4 is a schematic diagram of a battery module according to an embodiment. The battery module 400 includes a stacked body 110 in which a plurality of rechargeable batteries 100 are stacked, and a restraining member 200 for restraining the plurality of rechargeable batteries 100. The battery module 400 has a rectangular parallelepiped shape.

[0050] (Constraint member)

[0051] The restraining member 200 is extended in the stacking direction (Z direction) of the stacking body 110 along the first surface 111a of the stacking body 110. In one embodiment, the restraining member 200 is extended in the stacking direction (Z direction) of the stacking body 110 in a manner that completely covers the first surface 111a of the stacking body 110. Figure 4 In the figure, the stacked body 110 and the restraining member 200 are shown separated, but the stacked body 110 and the restraining member 200 are joined. Thus, sufficient strength and rigidity can be given to the battery pack, especially sufficient strength and rigidity can be given to the stacked body 110 in the stacking direction.

[0052] The material of the restraining member 200 is not particularly limited as long as it can provide sufficient strength and rigidity to the battery pack, and a metal sheet or metal plate such as aluminum, copper, or SUS can be used.

[0053] The shape of the restraining member 200 is not particularly limited as long as it can restrain multiple rechargeable batteries 100. In one embodiment, the surface of the restraining member 200 observed from the thickness direction (X direction) can be set to a rectangle, a trapezoid, a parallelogram, etc. In addition, when observed from the thickness direction (X direction) of the restraining member 200, the length in the width direction (Y direction) can be constant or partially different along the length direction (Z direction) of the restraining member 200. In addition, the thickness (length in the X direction) of the restraining member 200 can be constant or partially different along the length direction of the restraining member 200. In this way, multiple rechargeable batteries 100 can be fully restrained.

[0054] The lower limit of the thickness (length in the X direction) of the restraining member 200 is not particularly limited, and the thinnest position can be set to be above 1 mm in one embodiment, to be above 2 mm in another embodiment, and to be above 5 mm in another embodiment. Thus, sufficient strength and rigidity can be given to the battery pack. Furthermore, the upper limit of the thickness (length in the X direction) of the restraining member 200 is not particularly limited, and the thinnest position can be set to be below 20 mm in one embodiment, to be below 10 mm in another embodiment, and to be below 7 mm in another embodiment. Thus, the space for carrying the rechargeable battery 100 is increased.

[0055] Furthermore, the restraining member 200 may be formed so that one or both ends of the restraining member 200 in the width direction (Y direction) cover a part of the laminate 110. For example, the restraining member 200 may have an I-shape or a U-shape when viewed from the Z direction.

[0056] The restraining member 200 is joined to the laminate 110. The joining method is not particularly limited. An example is given in which an adhesive is filled between the first surface 111a of the laminate 110 and the restraining member 200 for joining. The adhesive is not particularly limited. Examples include acrylic resin, polyurethane resin, silicone resin, epoxy resin, and olefin resin. In addition, an insulating separator (not shown) may be disposed between the restraining member 200 and the laminate 110.

[0057] (Battery module group)

[0058] Figure 5 4 is a schematic diagram of a plurality of battery modules according to an embodiment. A plurality of battery modules 400a to 400f are arranged along the third surface 113a of the stack 110 in the longitudinal direction (X direction) of the rechargeable battery 100 to form a battery module group 410. Figure 5 In the figure, the battery module group 410 is formed by six battery modules 400, but the number is not particularly limited.

[0059] Furthermore, the battery module 400f located at the end of the battery module group 410 has two restraining members 200 along the first surfaces 111a and 111b of the stack 110, and the restraining members 200 are arranged opposite to each other. In other words, a plurality of the battery modules 400a to 400f are arranged in a direction intersecting the longitudinal direction of the restraining members 200, and the restraining members 200 are arranged opposite to each other. Thus, the battery modules 400 are alternately arranged with the restraining members 200 in the X direction, and each battery module 400 is in a state of being sandwiched by the restraining members 200.

[0060] Furthermore, the battery module 400 can be joined to the restraining member 200 of the adjacent battery module 400. Therefore, the battery module group 410 can also be called a large battery module that can exert high strength and rigidity. In addition, the joining method is not particularly limited, and an example is given in which an adhesive is filled between the first surface 111b of the stacked body 110 of the battery module 400 and the restraining member 200 of the adjacent battery module 400 for joining. The adhesive can use the above-mentioned adhesive.

[0061] In this way, since the battery module 400 is joined by the restraining member 200, the battery pack 1000 involved in this embodiment does not need structural members such as the beam of the battery pack case 300 provided for the main purpose of fixing and protecting the battery module 400. In other words, in the battery pack 1000 involved in this embodiment, the strength and rigidity of the battery pack case 300, the external force resistance performance, and the holding structure of the rechargeable battery 100, which are undertaken by the structural members such as the beam of the battery pack case 300, are concentrated on the restraining member 200. As a result, the battery module 400 has sufficient strength and rigidity, and the battery pack case 300 can be made lighter. In addition, since the space for arranging the rechargeable battery 100 is increased, the loading efficiency of the rechargeable battery 100 is improved.

[0062] (End Plate)

[0063] Figure 6 1 is another schematic diagram of a plurality of battery modules according to an embodiment. The battery module group 410 may include end plates 600a and 600b extending along the third surfaces 113a and 113b of the stack 110 in the arrangement direction (X direction) of the plurality of battery modules 400. In other words, the length direction of the end plates 600a and 600b is a direction intersecting with the length direction of the restraint member 200. Thus, sufficient strength and rigidity can be imparted to the battery group.

[0064] exist Figure 6 In the figure, the stacked body 110, the restraining member 200, and the end plates 600a, 600b are shown as separated, but the stacked body 110, the restraining member 200, and the end plates 600a, 600b are combined. The combination method is not particularly limited, and a known technique can be used as appropriate.

[0065] And, in Figure 6 In the embodiment, one end plate 600a, 600b is provided on each of the third surfaces 113a, 113b of the stack 110, but a plurality of end plates 600a, 600b may be provided on each of the third surfaces 113a, 113b of the stack 110. For example, the end plates 600a, 600b may be provided with a length that connects adjacent battery modules 400 in the longitudinal direction (X direction), or a plurality of end plates 600a, 600b may be provided on each of the third surfaces 113a, 113b of the stack 110. Thus, the battery module group 410 is easily assembled.

[0066] The material of the end plates 600a and 600b is not particularly limited as long as it can provide sufficient strength and rigidity to the battery pack, and metal sheets or plates such as aluminum, copper, and SUS may be used.

[0067] In one embodiment, the end plates 600a and 600b are provided with holes through which fastening screws for fixing the battery module 400 to the battery pack case 300 can pass. The battery pack case 300 is provided with a pair of nuts that are threadedly engaged with the pair of fastening screws.

[0068] (Extrusion parts)

[0069] Figure 7 FIG. 1 is a schematic diagram of a battery module disposed in a battery pack housing according to an embodiment. Figure 7 In order to make the arrangement relationship between the pressing member 310 and the stack 110 and the structure of the pressing member 310 easier to understand, the structure after partially removing the battery module 400 is shown. In other words, the battery module 400 is arranged to cover substantially the entire bottom surface of the battery pack case 300.

[0070] The battery module 400 is configured such that the stacked body 310 is supported by the pressing member 310 provided on the battery pack case 300. In one embodiment, the battery module 400 may be configured such that the stacked body 110 is placed on the pressing member 310. Furthermore, the battery module 400 may be configured such that the entire stacked body 110 is placed on the pressing member 310, or a portion of the stacked body 110 is placed on the pressing member 310.

[0071] A plurality of extrusion components 310 are arranged in the stacking direction along the second surface 112b of the stacked body 110. The number of extrusion components 310 can be determined according to the size of the battery pack and the strength and rigidity, etc., and is not particularly limited. In one embodiment, the number of extrusion components 310 can be set to 2 or more, in another embodiment, the number of extrusion components 310 can be set to 4 or more, in another embodiment, the number of extrusion components 310 can be set to 6 or more, in another embodiment, the number of extrusion components 310 can be set to 8 or more, in one embodiment, the number of extrusion components 310 can be set to 20 or less, in another embodiment, the number of extrusion components 310 can be set to 18 or less, in another embodiment, the number of extrusion components 310 can be set to 16 or less, and in another embodiment, the number of extrusion components 310 can be set to 14 or less. In addition, the extrusion components 310 can be set on the bottom surface of the tray-type battery pack casing 300, or can be set to constitute the bottom surface of the tray-type battery pack casing 300.

[0072] The extrusion component 310 involved in this embodiment is obtained by extrusion processing. The length direction of the extrusion component 310 is roughly consistent with the extrusion direction (X direction). The bending rigidity in the extrusion direction of the extrusion component tends to become higher than the bending rigidity in the direction perpendicular to the extrusion direction. In this embodiment, each extrusion component 310 is configured so that its extrusion direction is a direction intersecting the stacking direction of the stack 110. In one embodiment, each extrusion component 310 can be configured so that its extrusion direction is a direction orthogonal to the stacking direction of the stack 110.

[0073] As described above, the restraint member 200 is extended and joined in the stacking direction (Z direction) of the stack 110, and can provide the battery pack with sufficient strength and rigidity in the stacking direction of the stack 110. On the other hand, the extrusion component 310 is configured so that its extrusion direction is a direction (X direction) intersecting the stacking direction (Z direction) of the stack 110, and can provide the battery pack with sufficient strength and rigidity in the direction intersecting the stacking direction of the stack 110.

[0074] In this way, since the battery pack 1000 according to the present embodiment can be provided with the pressing member 310 that can impart strength and rigidity in addition to the restraining member 200 provided on the battery module 400, the battery pack 1000 according to the present embodiment does not need structural members such as beams and side beams for ensuring the strength and rigidity and external force resistance of the battery pack housing 300. For the battery pack 1000 according to the present embodiment, the restraining member 200 and the pressing member 310 are responsible for ensuring the strength and rigidity of the battery pack housing 300 and the external force resistance performance, as well as the holding structure of the rechargeable battery 100, which were previously borne by the structural members such as beams and side beams of the battery pack housing 300. As a result, the battery module 400 has sufficient strength and rigidity, and the battery pack housing 300 can be made lighter, and since the space for arranging the rechargeable battery 100 is increased, the loading efficiency of the rechargeable battery 100 is improved.

[0075] Furthermore, in one embodiment, the battery pack 1000 according to the present embodiment can be mounted on a vehicle, and the battery pack 1000 can be configured such that the direction intersecting the stacking direction of the stack 110 faces the front-rear direction L1 of the vehicle. In other words, the battery pack 1000 is configured such that the pressing direction of the pressing member 310 is substantially consistent with the front-rear direction L1 of the vehicle, and the stacking direction of the stack 110 (the length direction of the restraint member 200) is substantially consistent with the left-right direction L2 of the vehicle. Thus, when the battery pack 1000 is mounted on a vehicle, sufficient strength and rigidity can be imparted to the battery pack 1000 in two different directions.

[0076] In another embodiment, the extrusion member 310 may include a fluid passage 320 therein for the heat medium to pass through. The fluid passage 320 extends along the extrusion direction of the extrusion member 310 and may be formed when the extrusion member 310 is extruded. Thus, the battery module 400 may be efficiently heated and cooled. Figure 7 In the figure, one extrusion member 310 is shown to have the fluid passage 320 , but the fluid passage 320 may be provided in all the extrusion members 310 , or may be provided in a part of the extrusion members 310 .

[0077] like Figure 7As shown, by arranging the rechargeable battery 100 in such a manner that the predetermined surface (bottom) of the rechargeable battery 100 faces the pressing member 310, the heat of the rechargeable battery 100 is transferred to the pressing member 310, or the heat of the pressing member 310 is transferred to the rechargeable battery 200. In this way, the rechargeable battery 100 can be cooled or heated. The heat medium passing through the fluid passage 320 is not particularly limited as long as it can be heated or cooled, and can be a gas medium, a liquid medium, or the wind when the vehicle is running, and other known technologies can be used as appropriate.

[0078] <Summary of implementation methods>

[0079] The above-mentioned embodiments disclose at least the following battery pack.

[0080] 1. The battery pack (1000) of the above embodiment comprises:

[0081] A stacked body (110) formed by stacking a plurality of rechargeable batteries (100);

[0082] a restraining member (200) extending along the first surface (111a) of the stacked body (110) in the stacking direction of the stacked body (110) and restraining the plurality of rechargeable batteries (100); and

[0083] a pressing member (310) which is arranged in plurality along the second surface (112a) of the stacked body (110) in the stacking direction and supports the stacked body (110);

[0084] Each of the pressing members (310) is arranged such that its pressing direction is a direction intersecting with the stacking direction.

[0085] According to this embodiment, sufficient strength and rigidity can be imparted to the battery pack, while an increase in the weight of the battery pack can be suppressed, thereby improving the efficiency of mounting the secondary battery.

[0086] 2. Based on the above implementation,

[0087] The stacked body (110) is joined to the restraining member (200).

[0088] According to this embodiment, sufficient strength and rigidity can be imparted to the battery module.

[0089] 3. Based on the above implementation method,

[0090] The stacked body (110) is placed on the pressing member (310).

[0091] According to this embodiment, sufficient strength and rigidity can be imparted to the battery module, and the battery pack can be efficiently heated and cooled.

[0092] 4. Based on the above implementation methods,

[0093] The stacked body (110) and the restraining member (200) are arranged in a plurality in a direction intersecting the stacking direction.

[0094] The restraining members (200) are arranged opposite to each other.

[0095] According to this embodiment, sufficient strength and rigidity can be imparted to the battery module, an increase in the weight of the battery pack can be suppressed, and the efficiency of mounting the secondary battery can be improved.

[0096] 5. Based on the above implementation methods,

[0097] The extrusion member (310) includes a fluid passage (320) through which a heat medium passes, and the fluid passage (320) extends in the extrusion direction.

[0098] According to this embodiment, the battery pack can be heated and cooled efficiently.

[0099] 6. Based on the above implementation methods,

[0100] The battery pack (1000) is mounted on a vehicle.

[0101] The battery pack (1000) is arranged such that a direction intersecting the stacking direction faces the front-rear direction of the vehicle.

[0102] According to this embodiment, sufficient strength and rigidity can be imparted to the battery module in the front-rear and left-right directions of the vehicle.

[0103] As mentioned above, although embodiment of the invention was described, this invention is not limited to the said embodiment, Various deformation|transformation and change are possible within the range of the summary of this invention.

Claims

1. A battery pack, characterized in that: The battery pack comprises: A stacked body formed by stacking a plurality of rechargeable batteries; a restraining member extending along the first surface of the stacked body in the stacking direction of the stacked body and restraining the plurality of rechargeable batteries; as well as a pressing member, a plurality of which are arranged in the stacking direction along the second surface of the stacked body and support the stacked body, Each of the pressing members is arranged so that its pressing direction is a direction intersecting the stacking direction.

2. The battery pack according to claim 1, characterized in that: The stacked body is engaged with the restraining member.

3. The battery pack according to claim 1, characterized in that: The stacked body is placed on the pressing member.

4. The battery pack according to claim 1, characterized in that: The stacked body and the restraining member are arranged in a plurality in a direction intersecting the stacking direction. The restraint members are arranged opposite to each other.

5. The battery pack according to claim 1, characterized in that: The extrusion member includes a fluid passage through which a heat medium passes, and the fluid passage extends in the extrusion direction.

6. The battery pack according to claim 1, characterized in that: The battery pack is mounted on a vehicle. The battery pack is arranged such that a direction intersecting the stacking direction faces the front-rear direction of the vehicle.

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