Battery unit

Abstract

To provide a battery unit which enables improvement of rigidity of a base plate with a small number of components.SOLUTION: A battery unit 10 mounted on a vehicle V includes: a base plate 50; and a battery module 11 which is fixed to the base plate 50 and in which multiple battery cells are stacked. A passage 53 is formed between the base plate 50 and the battery module 11. The base plate 50 is provided with: a lower suspension member 81 which traverses the passage 53 and forms a part of the passage 53; and an upper suspension member 82 extending above the lower suspension member 81.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a battery unit mounted on an electric vehicle or the like. [Background technology]

[0002] In recent years, research and development into secondary batteries that contribute to energy efficiency has been conducted to ensure that more people have access to affordable, reliable, sustainable and advanced energy.

[0003] Secondary batteries are mounted as battery units in electric vehicles such as electric vehicles or hybrid electric vehicles. Generally, the battery unit is unitized with a fan that blows cooling air to the battery, a duct that guides the cooling air blown out from the fan to the battery, and the like (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-032934 Summary of the Invention [Problem to be solved by the invention]

[0005] When a battery unit is installed in an electric vehicle, the battery unit must have sufficient rigidity to protect the internal components from vehicle collisions, etc. There is also a need to reduce the number of parts to make assembly easier.

[0006] The present invention provides a battery unit that can improve the rigidity of a base plate with a small number of parts, thereby contributing to energy efficiency. [Means for solving the problem]

[0007] The present invention provides A battery unit mounted on a vehicle, A base plate and a battery module fixed to the base plate and including a plurality of stacked battery cells; the battery module is placed on the base plate; a flow path is formed between the base plate and the battery module; The base plate includes: a first electrode that crosses the flow path and forms a part of the flow path; plate The components and The first plate A second extending above the member plate a member; 、 the second plate member has one end and the other end fixed to the base plate, The first plate member and the second plate member are fixed to each other between the one end and the other end. . The present invention also provides A battery unit mounted on a vehicle, A base plate and a battery module fixed to the base plate and including a plurality of stacked battery cells; the battery module is placed on the base plate; a flow path is formed between the base plate and the battery module; The base plate includes: a first plate member that crosses the flow path and forms a portion of the flow path; a second plate member extending above the first plate member; The battery unit includes: a fan mounted on the base plate; a blower duct connected to the outlet of the fan and communicating the outlet with the flow path, the air duct opens downward and covers the upper surface of the first plate member, A seal member is provided between the upper surface of the first plate member and the lower surface of the air duct. The present invention also provides A battery unit mounted on a vehicle, A base plate and a battery module fixed to the base plate and including a plurality of stacked battery cells; the battery module is placed on the base plate; a flow path is formed between the base plate and the battery module; The base plate includes: a first plate member that crosses the flow path and forms a portion of the flow path; a second plate member extending above the first plate member; The battery unit includes: a battery module fixing member that supports the battery module and is fixed to the second plate member; The battery module is fixed to the base plate via the battery module fixing member and the second plate member. The present invention also provides A battery unit mounted on a vehicle, A base plate and a battery module fixed to the base plate and including a plurality of stacked battery cells; the battery module is placed on the base plate; a flow path is formed between the base plate and the battery module; The base plate includes: a first plate member that crosses the flow path and forms a portion of the flow path; a second plate member extending above the first plate member; the base plate has a vehicle fixing portion that is fixed to the vehicle, The second plate member has a second fixing portion that is fixed to the vehicle fixing portion. [Effects of the Invention]

[0008] According to the present invention, the rigidity of the base plate can be improved with a small number of parts. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view of the rear seat area of ​​a vehicle V equipped with a battery unit 10 according to an embodiment of the present invention. [Figure 2] 1 is an exploded perspective view of a battery unit 10 according to an embodiment of the present invention. [Figure 3] 1 is a perspective view of a base plate 50 to which a lower suspension member 81 and an upper suspension member 82 are attached. [Figure 4] 2 is a partial perspective view of a base plate 50 on which a fan 20, a blower duct 40, and a battery module 11 are mounted. FIG. [Figure 5] 5 is a top view of FIG. 4 when the battery module 11 is not placed. [Figure 6] 6 is a cross-sectional view taken along the line AA in FIG. 5. [Figure 7] FIG. 2 is a perspective view of the air duct 40 as seen from the lower left. DETAILED DESCRIPTION OF THE INVENTION

[0010] An embodiment of a battery unit of the present invention will be described below with reference to the accompanying drawings. In this embodiment, the battery unit is mounted on a vehicle. The drawings are to be viewed in accordance with the directions of the reference numerals. Furthermore, for simplicity and clarity of explanation in this specification, the front-rear, left-right, and up-down directions are described according to the direction as seen by the driver of the vehicle, and in the drawings, the front of the vehicle is indicated as Fr, the rear as Rr, the left as L, the right as R, the upside as U, and the downside as D.

[0011] <Vehicle> As shown in FIG. 1, the battery unit 10 of this embodiment is mounted on a vehicle V. The vehicle V is an electrically powered vehicle such as a hybrid vehicle or an electric vehicle, and is configured to be able to travel by driving a motor with power stored in the battery unit 10. The battery unit 10 is placed on and fixed to a floor panel 1. The rear seats of the vehicle V are located above the battery unit 10.

[0012] The floor panel 1 has a front floor panel 2 that forms the floor of the passenger compartment CB, and a rear floor panel 3 that forms the floor of the luggage compartment LG provided behind the passenger compartment CB. The front floor panel 2 and the rear floor panel 3 are connected below the rear seats. Both ends of the floor panel 1 in the vehicle width direction are connected to a pair of left and right skeletal frame members 5 that extend along the front-to-rear direction, thereby fixing the floor panel 1 to the skeletal frame members 5.

[0013] An upwardly rising kick-up portion 2a is formed at the rear end of the front floor panel 2. A center tunnel 2b is formed along the front-to-rear direction in the center of the front floor panel 2 in the vehicle width direction. The center tunnel 2b is bent so that the front floor panel 2 is convex upward, and a trapezoidal tunnel space 4 is formed below it.

[0014] <Overall configuration of the battery unit> 2, the battery unit 10 includes a battery module 11, a fan 20 that blows out cooling gas to cool the battery module 11, an intake duct 30 that introduces the cooling gas into the fan 20, a blower duct 40 that sends out the cooling gas blown out from the fan 20 in a desired direction, a battery control device 12 that controls charging and discharging of the battery module 11, a junction board 13 that electrically connects the battery module 11 to an external device (not shown) and on which wiring components are mounted to carry charging power and discharging power of the battery module 11, and a case 15 that houses these components. The fan 20, the intake duct 30, the blower duct 40, the battery control device 12, and the junction board 13 are provided in positions that at least partially overlap the battery module 11 when viewed in the vehicle width direction.

[0015] The case 15 has a base plate 50 on which the battery module 11, the fan 20, and the air duct 40 are placed, and a cover 60 that covers the base plate 50 from above. A storage recess (not shown) extending in the vehicle width direction is formed in the front end of the rear floor panel 3 shown in FIG. 1, and the base plate 50 is stored in the storage recess. The cover 60 covers the base plate 50 and is fixed to the floor panel 1. An air intake 61 is formed in the front surface of the cover 60, and the air intake 61 is covered by a ventilated grill 65. Details of the base plate 50 will be described later using FIG. 3.

[0016] The battery modules 11 include a front battery module 11A disposed on the front side and a rear battery module 11B disposed on the rear side. Each battery module 11A, 11B has a generally rectangular parallelepiped shape that is elongated in the vehicle width direction, and is placed on a base plate 50 facing each other in the front-to-rear direction. Hereinafter, when there is no need to distinguish between the front battery module 11A and the rear battery module 11B, they will be collectively referred to as battery modules 11.

[0017] The battery module 11 has a plurality of battery cells stacked in the vehicle width direction. Inter-cell flow paths 11a are formed between adjacent battery cells, and the battery module 11 is cooled by cooling gas flowing through the inter-cell flow paths 11a.

[0018] The fan 20 is fixed to a base plate 50. As shown in FIGS. 2, 4, and 5, the fan 20 has an impeller 21 that draws in cooling gas from the direction of its rotation axis and blows out the cooling gas in a centrifugal direction, and a fan case 22 that supports and houses the impeller 21. The fan case 22 has an inlet 23 that draws in cooling gas to be supplied to the impeller 21 and an outlet 24 that discharges cooling gas blown out from the impeller 21. In this embodiment, the rotation axis of the impeller 21 extends in the vertical direction. The fan case 22 has a generally cylindrical shape that extends in the vertical direction. The inlet 23 opens upward. The outlet 24 protrudes to the left from the generally cylindrical fan case 22 and opens leftward. Therefore, the fan 20 draws in cooling gas from above through the inlet 23 and blows out the cooling gas to the left through the outlet 24.

[0019] As shown in FIG. 2 , the intake duct 30 connects the intake port 61 of the cover 60 and the inlet port 23 of the fan 20, and guides the air in the vehicle compartment CB as cooling gas from the intake port 61 to the fan 20. The intake duct 30 includes an upstream intake duct 31 disposed above the battery module 11 and a downstream intake duct 32 disposed to the right of the battery module 11. The upstream intake duct 31 has an intake port connector 31a connected to the intake port 61, and the downstream intake duct 32 has a fan connector 32a connected to the inlet port 23. The upstream intake duct 31 and the downstream intake duct 32 are connected to each other, and their respective flow paths communicate with each other.

[0020] The air duct 40 is provided between the battery module 11 and the fan 20, and is connected to the air outlet 24 of the fan 20. The air duct 40 sends out the cooling gas blown out from the air outlet 24 along the lower surface of the battery module 11. Details of the air duct 40 will be described later.

[0021] The cooling gas delivered below the battery module 11 flows from bottom to top through the inter-cell flow passages 11a, cooling the battery module 11, and is then discharged from the top surface of the battery module 11. The cooling gas then flows inside the case 15 toward the gap formed between the front end 62 of the cover 60 and the floor panel 1, and is discharged to the outside of the case 15 as shown by the arrow in FIG. 1. A sealing member 64 is provided in the gap formed between the rear end 63 of the cover 60 and the floor panel 1, and is configured to prevent the cooling gas from being discharged toward the rear floor panel 3. The sealing member 64 is made of an elastic material such as rubber.

[0022] The battery control device 12 is disposed between the upstream intake duct 31 and the battery module 11. An L-shaped bracket 70 is fixed to the battery module 11, and the bracket 70 has a control device fixing portion 71 facing the upper surface of the battery module 11 and a module fixing portion 72 facing the right surface of the battery module 11 (see FIG. 4). The battery control device 12 is placed on the control device fixing portion 71. The battery control device 12 is realized by an ECU (Electronic Control Unit) including a processor, memory, interface, etc.

[0023] The junction board 13 is disposed above the downstream intake duct 32. More specifically, the junction board 13 is placed on a junction board bracket 14 provided above the downstream intake duct 32. The junction board bracket 14 is fixed to a base plate 50.

[0024] <Base plate structure> Next, the structure of the base plate 50 and the flow passages 53 formed in the base plate 50 will be described with reference to FIGS.

[0025] As shown in FIG. 3, the base plate 50 has a bottom wall portion 50a that covers the battery module 11 and the fan 20 from below, a front wall portion 50b that bends upward from the front edge of the bottom wall portion 50a, a rear wall portion 50c that bends upward from the rear edge of the bottom wall portion 50a, a left wall portion 50d that bends upward from the left edge of the bottom wall portion 50a, and a right wall portion 50e that bends upward from the right edge of the bottom wall portion 50a.

[0026] The base plate 50 has a front frame 51 provided on the front wall portion 50b and a rear frame 52 provided on the rear wall portion 50c. The front frame 51 has a vehicle fixing portion 51a fixed to the kick-up portion 2a of the front floor panel 2, and the rear frame 52 has a vehicle fixing portion 52a fixed to the front end portion of the rear floor panel 3. Specifically, the vehicle fixing portion 51a and the vehicle fixing portion 52a are through holes, and the base plate 50 is fixed to the floor panel 1 of the vehicle V by fastening members such as bolts that pass through the through holes. Note that the vehicle fixing portion 51a and the vehicle fixing portion 52a may be provided directly on the base plate 50 without providing the front frame 51 and the rear frame 52.

[0027] 6, the base plate 50 is formed with a flow path 53 that extends from the air outlet 24 of the fan 20 to the space between the bottom wall portion 50a and the lower surface of the battery module 11. The flow path 53 has a flow path 53a formed by the lower surface of the battery module 11 and the bottom wall portion 50a, a flow path 53b formed by the lower surface of a lower suspension member 81 (described later) and the bottom wall portion 50a, and a flow path 53c formed by the inner surface of the air supply duct 40 and the bottom wall portion 50a.

[0028] 3, a recess 54 extending in the vehicle width direction (longitudinal direction) is formed in the bottom wall portion 50a of the base plate 50 at a position where the battery module 11 is placed. Two recesses 54 are formed corresponding to the positions of the battery modules 11A and 11B. The flow path 53a is formed in a space formed by the recesses 54 and the lower surface of the battery module 11.

[0029] A lower suspension member 81 is provided on the base plate 50, which crosses the flow path 53 in the front-rear direction and forms a part of the flow path 53 (flow path 53b). The lower suspension member 81 is a plate-shaped member fixed to the bottom wall portion 50a. The lower suspension member 81 is disposed between the battery module 11 and the air duct 40 in the direction in which the flow path 53 extends (i.e., the vehicle width direction).

[0030] 3 and 6, the lower suspension member 81 includes a ceiling portion 81a extending in the front-to-rear direction, and legs 81b extending diagonally downward from the front and rear edges of the ceiling portion 81a. A flange portion 81c is provided at the tip of the leg portion 81b and is fixed to the bottom wall portion 50a of the base plate 50. A side wall portion 81d sloping downward is provided at the left end of the ceiling portion 81a. A flange portion 81c is also provided at the tip of the side wall portion 81d.

[0031] A flow path 53b is formed in the space formed by the lower surface of the lower suspension member 81 and the bottom wall portion 50a of the base plate 50, and communicates with the flow path 53a. Therefore, the lower suspension member 81 functions as a duct that forms part of the flow path 53. Furthermore, because the lower suspension member 81 extends in the front-to-rear direction and is fixed to the base plate 50, the rigidity of the base plate 50 can be improved. Therefore, the lower suspension member 81 also functions as a reinforcing member that reinforces the base plate 50. Therefore, by utilizing the lower suspension member 81, which functions as a duct, as a reinforcing member as well, the rigidity of the base plate 50 can be improved with a small number of parts.

[0032] An upper suspension member 82 is provided on the base plate 50, extending in the front-to-rear direction above the lower suspension member 81. The upper suspension member 82 is a plate-shaped member like the lower suspension member 81, and is disposed between the battery module 11 and the air duct 40 in the direction in which the flow path 53 extends. A rear end 82a of the upper suspension member 82 is fixed to the rear wall portion 50c of the base plate 50 by welding or the like, and a front end 82b is fixed to the vehicle fixing portion 51a of the front frame 51 by a front end fixing portion F1. The front end fixing portion F1 is a through-hole, and is fixed to the vehicle fixing portion 51a by a fastening member such as a bolt.

[0033] In this way, the upper suspension member 82 extends in the front-to-rear direction and is fixed to the base plate 50, and therefore, together with the lower suspension member 81, the rigidity of the base plate 50 can be further improved. In particular, the upper suspension member 82 has a front end fixing portion F1 that is fixed to the vehicle fixing portion 51a, and therefore the rigidity of the vehicle fixing portion 51a can also be improved.

[0034] The upper suspension member 82 has a fixing portion F2 that is fixed to the ceiling portion 81a of the lower suspension member 81. The fixing portion F2 is a through-hole. At the fixing portion F2, a bolt is inserted into a through-hole that is formed in the ceiling portion 81a of the lower suspension member 81 and the upper suspension member 82 and that communicates with each other, and the bolt is fastened with a nut. This fixes the upper suspension member 82 and the lower suspension member 81 to each other, and they function as stronger reinforcing members. As will be described later, the fixing portion F2 may also fix the module fixing portion 72 of the bracket 70.

[0035] As shown in FIGS. 3 and 6 , the upper suspension member 82 has an abutment portion 82c that abuts against the ceiling portion 81a of the lower suspension member 81, step portions 82d formed on the right front edge and right rear edge, and a bent portion 82e formed on the left edge. The step portion 82d has a stepped shape that protrudes upward from the abutment portion 82c and is spaced apart from the ceiling portion 81a of the lower suspension member 81. The bent portion 82e is bent downward and is spaced apart from the ceiling portion 81a and side wall portion 81d of the lower suspension member 81. With this configuration, a space 84 is formed between the lower suspension member 81 and the upper suspension member 82 in a cross section perpendicular to the direction in which the lower suspension member 81 and the upper suspension member 82 extend (the front-to-rear direction). This provides a structure that more strongly reinforces the base plate 50, thereby improving the rigidity of the base plate 50.

[0036] Air duct 40 connects air outlet 24 of fan 20 and lower suspension member 81, and forms flow path 53c that communicates with flow path 53b. As shown in Fig. 7, air duct 40 has a connecting portion 41 that connects to air outlet 24 of fan 20, and a main body portion 42 in which an opening 44 that opens downward and leftward is formed. Flow path 53c is formed between the inner surface of main body portion 42 and bottom wall portion 50a of base plate 50.

[0037] The outer edge of the opening 44 (part of the inner surface of the air duct 40) has a left edge 45 that faces the upper surface of the lower suspension member 81 (upper surfaces of the ceiling portion 81a, the legs 81b, and the flange portion 81c), and a right edge 46 that is continuous with the left edge 45 and faces the bottom wall portion 50a of the base plate 50. The left edge 45 has a shape that follows the upper surface of the lower suspension member 81, and the right edge 46 has a shape that follows the bottom wall portion 50a.

[0038] A sealing member 47 is continuously provided on the left edge 45 and the right edge 46 of the air supply duct 40. The sealing member 47 is made of an elastic material such as rubber. When the air supply duct 40 is attached to the base plate 50, the sealing member 47 is disposed between the left edge 45 and the upper surface of the lower suspension member 81, sealing the passage 53 so that cooling gas does not leak. Similarly, the sealing member 47 is disposed between the right edge 46 and the bottom wall 50a of the base plate 50, sealing the passage 53 so that cooling gas does not leak. Therefore, the passage 53 can be sealed simply by placing the air supply duct 40 over the upper surface of the lower suspension member 81 from above. This facilitates assembly of the battery unit 10.

[0039] Next, the fixing of the battery module 11 and the air duct 40 to the upper suspension member 82 will be described.

[0040] A module fixing portion 72 of a bracket 70 is fixed to the right surface of the battery module 11. The module fixing portion 72 is fixed to the upper surface of an upper suspension member 82, as will be described later. In other words, the battery module 11 is fixed to the base plate 50 via the module fixing portion 72 and the upper suspension member 82.

[0041] The upper suspension member 82 has a fixing portion F3 to which the module fixing portion 72 is fixed. The fixing portions F3 are provided in two locations spaced apart in the front-to-rear direction, and the fixing portion F2 is disposed between the two fixing portions F3. The fixing portion F3 is a through-hole. At the fixing portion F3, a bolt is inserted into the through-holes that communicate with each other and are formed in the lower end of the module fixing portion 72 and the upper suspension member 82, and the bolts are fastened with nuts. This fixes the module fixing portion 72 to the upper suspension member 82. Therefore, the upper suspension member 82 can support the battery module 11 while functioning as a reinforcing member that reinforces the base plate 50.

[0042] The module fixing portion 72 is also fixed to a fixing portion F2 to which the upper suspension member 82 and the lower suspension member 81 are fixed. Specifically, a bolt that fastens the lower suspension member 81 and the upper suspension member 82 is also inserted into a through-hole formed at the lower end of the module fixing portion 72 and fastened with a nut. In this way, the module fixing portion 72 is fixed to both the upper suspension member 82 and the lower suspension member 81 by the fixing portion F2, so that the rigidity of the structure for fixing the battery module 11 can be improved compared to when the module fixing portion 72 is fixed only to the upper suspension member 82.

[0043] As shown in FIG. 2, a bracket 73 for fixing the battery module 11 is separately provided on the left surface of the battery module 11 and fixed to the base plate 50.

[0044] After the air duct 40 is placed on the upper surface of the lower suspension member 81 from above, the air duct 40 is fixed to the upper suspension member 82 by the fixing portion F3. In other words, the upper suspension member 82 is also used to fix the air duct 40.

[0045] Specifically, the air duct 40 has an extension portion 43 that extends horizontally from the upper end of the main body portion 42. The extension portion 43 extends above the module fixing portion 72 and the upper suspension member 82. At the fixing portion F3, a bolt that passes through a through hole formed in the upper suspension member 82 and the module fixing portion 72 also passes through a through hole formed in the extension portion 43 and is fastened with a nut.

[0046] In this way, the air duct 40 is placed on the base plate 50 so as to cover the upper surface of the lower suspension member 81 from above, and is fixed to the upper suspension member 82 by the fixing portion F3. This makes it easy to assemble the air duct 40. Furthermore, since the fixing portion F3 fixes both the air duct 40 and the module fixing portion 72 to the upper suspension member 82, the number of parts can be reduced compared to when fixing portions are provided separately for the air duct 40 and the module fixing portion 72. Note that the air duct 40 may be fixed to the upper suspension member 82 by fixing portions other than the fixing portion F3.

[0047] Although one embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such an embodiment. It is clear that a person skilled in the art can conceive of various modifications or alterations within the scope of the claims, and it is understood that these also naturally fall within the technical scope of the present invention. Furthermore, the components of the above embodiment may be combined in any manner without departing from the spirit of the invention.

[0048] For example, in the above embodiment, the front end fixing portion F1 and the fixing portions F2 and F3 of the upper suspension member 82 are fastened by inserting bolts or the like into through holes, but this is not limited to this. For example, the front end fixing portion F1 and the fixing portions F2 and F3 may be fastened by welding or the like to fix the upper suspension member 82 to another member.

[0049] This specification describes at least the following: In parentheses, components corresponding to those in the above-described embodiments are shown as examples, but the present invention is not limited to these.

[0050] (1) A battery unit (battery unit 10) mounted on a vehicle, a base plate (base plate 50); a battery module (battery module 11) fixed to the base plate and including a plurality of stacked battery cells; A flow path (flow path 53) is formed between the base plate and the battery module, The base plate includes: a first suspension member (lower suspension member 81) that crosses the flow path and forms a part of the flow path (flow path 53b); a second suspension member (upper suspension member 82) extending above the first suspension member,

[0051] According to (1), the base plate is provided with a first suspension member that crosses the flow path and forms part of the flow path, so that the first suspension member not only functions as a duct but also as a reinforcing member that improves the rigidity of the base plate. Therefore, the rigidity of the base plate can be improved with a small number of parts. In addition, the base plate is provided with a second suspension member that extends above the first suspension member, so the rigidity of the base plate can be further improved.

[0052] (2) The battery unit according to (1), The second suspension member has one end (rear end 82a) and the other end (front end 82b) fixed to the base plate, The first suspension member and the second suspension member are fixed to each other between the one end and the other end of the battery unit.

[0053] According to (2), the first suspension member and the second suspension member are fixed to each other between one end and the other end, so that the first suspension member and the second suspension member can function as stronger reinforcing members.

[0054] (3) The battery unit according to (1) or (2), a fan (fan 20) mounted on the base plate; an air duct (air duct 40) connected to the air outlet (air outlet 24) of the fan and communicating the air outlet with the flow path; the air duct opens downward and covers an upper surface of the first suspension member, The battery unit further comprises a seal member (seal member 47) provided between the upper surface of the first suspension member and the lower surface of the air duct.

[0055] According to (3), since a seal member is provided between the upper surface of the first suspension member and the lower surface of the air duct, the flow path can be sealed simply by placing the air duct over the upper surface of the first suspension member from above, which makes it easier to assemble the battery unit.

[0056] (4) The battery unit according to (3), The air duct is fixed to the second suspension member.

[0057] According to (4), since the air duct is fixed to the second suspension member, the second suspension member can also be used to fix the air duct.

[0058] (5) A battery unit according to any one of (1) to (4), a battery module fixing member (module fixing portion 72) that supports the battery module and is fixed to the second suspension member; The battery module is fixed to the base plate via the battery module fixing member and the second suspension member.

[0059] According to (5), the battery module is fixed to the base plate via the battery module fixing member and the second suspension member, so that the second suspension member can support the battery module while functioning as a reinforcing member that reinforces the base plate.

[0060] (6) The battery unit according to (5), the second suspension member has a first fixing portion (fixing portion F2) to which the battery module fixing member is fixed, The first suspension member is fixed to the first fixing portion together with the battery module fixing member, the battery unit.

[0061] According to (6), the battery module fixing member is fixed to the first suspension member as well as the second suspension member by the first fixing portion, so that the rigidity of the structure for fixing the battery module 11 can be improved compared to when the module fixing member is fixed only to the second suspension member.

[0062] (7) A battery unit according to any one of (1) to (6), The base plate has a vehicle fixing portion (vehicle fixing portion 51a) that is fixed to the vehicle, The second suspension member has a second fixing portion (front end fixing portion F1) fixed to the vehicle fixing portion.

[0063] According to (7), the second suspension member has the second fixing portion that is fixed to the vehicle fixing portion, and therefore the rigidity of the vehicle fixing portion can be improved.

[0064] (8) A battery unit according to any one of (1) to (7), The flow path communicates with inter-cell flow paths (inter-cell flow paths 11a) formed between the battery cells, forming a battery unit.

[0065] According to (8), the flow path communicates with the inter-cell flow path formed between each battery cell, so that the battery cells can be cooled. [Explanation of symbols]

[0066] 10 Battery Unit 11 Battery Module 11a Inter-cell flow channel 20 fans 24 Air outlet 40 Ventilation duct 47 Sealing material 50 base plate 51a Vehicle fixing part 53 Flow path 72 Module fixing part (battery module fixing member) 81 Lower suspension member (first suspension member) 82 Upper suspension member (second suspension member) 82a Rear end (one end) 82b Front end (other end) F1 Front end fixing part (second fixing part) F2 Fixed part (1st fixed part)

Claims

1. A battery unit mounted on a vehicle, A base plate and a battery module fixed to the base plate and including a plurality of stacked battery cells; the battery module is placed on the base plate; a flow path is formed between the base plate and the battery module; The base plate includes: a first plate member that crosses the flow path and forms a portion of the flow path; a second plate member extending above the first plate member, the second plate member has one end and the other end fixed to the base plate, The first plate member and the second plate member are fixed to each other between the one end and the other end of the battery unit.

2. A battery unit mounted on a vehicle, A base plate and a battery module fixed to the base plate and including a plurality of stacked battery cells; the battery module is placed on the base plate; a flow path is formed between the base plate and the battery module; The base plate includes: a first plate member that crosses the flow path and forms a portion of the flow path; a second plate member extending above the first plate member, The battery unit includes: a fan mounted on the base plate; a blower duct connected to the outlet of the fan and communicating the outlet with the flow path, the air duct opens downward and covers the upper surface of the first plate member, A seal member is provided between the upper surface of the first plate member and the lower surface of the air duct.

3. 3. The battery unit according to claim 2, The air duct is fixed to the second plate member.

4. A battery unit mounted on a vehicle, A base plate and a battery module fixed to the base plate and including a plurality of stacked battery cells; the battery module is placed on the base plate; a flow path is formed between the base plate and the battery module; The base plate includes: a first plate member that crosses the flow path and forms a portion of the flow path; a second plate member extending above the first plate member, The battery unit includes: a battery module fixing member that supports the battery module and is fixed to the second plate member; The battery module is fixed to the base plate via the battery module fixing member and the second plate member.

5. 5. The battery unit according to claim 4, the second plate member has a first fixing portion to which the battery module fixing member is fixed, The first plate member is fixed to the first fixing portion together with the battery module fixing member.

6. A battery unit mounted on a vehicle, A base plate and a battery module fixed to the base plate and including a plurality of stacked battery cells; the battery module is placed on the base plate; a flow path is formed between the base plate and the battery module; The base plate includes: a first plate member that crosses the flow path and forms a portion of the flow path; a second plate member extending above the first plate member, the base plate has a vehicle fixing portion that is fixed to the vehicle, The second plate member has a second fixing portion that is fixed to the vehicle fixing portion.

7. 7. The battery unit according to claim 1, The flow path communicates with inter-cell flow paths formed between each battery cell of the battery unit.

Images