JP6769903B2 - In-vehicle battery - Google Patents

Description

The present invention relates to a technical field of an in-vehicle battery having a storage case and a battery module housed in the storage case.

Japanese Patent No. 5206110

Various vehicles such as automobiles are equipped with in-vehicle batteries for supplying electric power to motors and various electrical components.

In recent years, in particular, vehicles such as electric vehicles, hybrid electric vehicles, and plug-in hybrid electric vehicles have become widespread, and vehicles powered by these electricity are equipped with an in-vehicle battery having a high power storage function.

The in-vehicle battery is provided with a storage case and a battery module stored in the storage case, and the battery module is configured by arranging a plurality of battery cells (secondary batteries) such as a nickel hydrogen battery and a lithium ion battery, for example. Has been done. Further, in an in-vehicle battery mounted on an electric vehicle or the like, a plurality of battery modules are arranged in a storage case in order to maintain a high power storage function, and each battery cell of the plurality of battery modules is connected in series or in parallel. Some have been done.

Some of such in-vehicle batteries are arranged in a luggage compartment formed at the rear of the vehicle (see, for example, Patent Document 1).

The in-vehicle battery described in Patent Document 1 is partially inserted into an arrangement recess formed by opening upward in the floor panel, and is located between the rear side frames of the vehicle body provided separately to the left and right. ..

In the vehicle equipped with the in-vehicle battery described in Patent Document 1, the in-vehicle battery is arranged on the front side in the luggage compartment, and the space on the rear side of the storage case in the luggage compartment is used as a crushable area. It is formed. Therefore, when a load is applied from the rear due to a collision from the rear of the vehicle, the pair of rear side frames are crushed to absorb the impact, and the vehicle-mounted battery is protected.

On the other hand, in a vehicle equipped with an in-vehicle battery described in Patent Document 1, when a collision from the rear of the vehicle is a large collision, the rear side frame is crushed and a large load is applied from the rear to the in-vehicle battery. May be granted to. When a load is applied to the in-vehicle battery, the inclined part of the storage case is guided to the front part forming the arrangement recess, and the entire in-vehicle battery is slanted upward so as to avoid the cross member located in front of the arrangement recess. Moved forward. Therefore, the vehicle-mounted battery does not collide with the cross member, and an excessive load on the battery module housed inside the storage case is suppressed.

By the way, in a vehicle in which an in-vehicle battery is arranged in a luggage compartment as described above, functional parts having a predetermined function may be arranged in a crushable area. Functional parts include, for example, a fan motor that takes in and out air for cooling each part located inside the storage case, a puncture repair kit for repairing when a tire punctures, and a vehicle for lifting a vehicle. There are jacks etc. These fan motors and the like are highly rigid parts.

When a large collision occurs with a vehicle in which such functional parts are arranged in the crushable area, the functional parts arranged in the crushable area are moved forward in accordance with the collision. , The storage case may be destroyed by the functional parts, and the battery module or the like arranged inside the storage case may be damaged or destroyed.

In addition to the collision from the rear of the vehicle, for example, when a so-called pole collision occurs in which the rear part of the vehicle on which the vehicle-mounted battery is mounted collides with a utility pole or the like due to spin or the like, between the pair of rear side frames in the vehicle body. The part may collide with a utility pole or the like. Even in such a case, the functional parts arranged in the crushable area are moved forward in accordance with the collision, so that the battery modules arranged inside the storage case may be damaged or destroyed. is there.

Therefore, an object of the present invention is to overcome the above-mentioned problems and to protect each part arranged inside the storage case in the event of a collision.

The vehicle-mounted battery according to the present invention has a frame-shaped portion composed of at least a part of a pair of first portions separated from each other in the front-rear direction and at least a part of a pair of second parts separated from each other to the left and right. It is arranged in a holding frame fixed to the vehicle body and an arrangement recess formed in the floor panel by being held in the holding frame in a state of being inserted into the frame-shaped portion, and is arranged on the front wall portion, the rear wall portion, and the left and right. A storage case having a side wall portion and a bottom surface portion, a battery module housed in the storage case and a battery cell arranged inside, a partition plate for dividing the internal space of the storage case into an upper space and a lower space, and the above. The storage is provided with a reinforcing member having a connecting portion as a connecting portion to the front wall portion and the left and right side wall portions, and a protruding portion protruding from the connecting portion and having the partition plate mounted on the upper surface. At the front of the case, the connecting surface portion of the cross member is coupled to the floor panel, the connecting portion between the floor panel and the cross member is provided as a high rigidity portion, and the upper end of the protruding portion is above the lower end of the high rigidity portion. The lower end of the protruding portion is located below the upper end of the highly rigid portion.
As a result, when the high-rigidity portion and the front wall portion of the storage case come into contact with each other due to, for example, an impact from the rear of the vehicle, the portion of the storage case to which the protruding portion of the reinforcing member is attached comes into contact with the high-rigidity portion.

The vehicle-mounted battery described above straddles the front wall portion and the first front reinforcing portion attached so as to straddle the front wall portion, the left and right side wall portions, and the front wall portion inside the storage case. It may have a pair of second front reinforcing portions attached to the left and right separated from each other, and a front corner reinforcing frame coupled to the reinforcing member.
As a result, the impact transmitted to the front wall portion is easily transmitted to the reinforcing member via the front corner reinforcing frame.

The vehicle-mounted battery described above includes a fixed frame arranged on the upper surface of the bottom surface portion to which the battery module is attached to supplement the strength of the bottom surface portion in the front-rear direction, and the fixed frame and the front corner reinforcing frame are combined. You may.
As a result, the impact applied to the bottom surface portion is easily transmitted to the front wall portion and the reinforcing member via the front corner reinforcing frame.

The vehicle-mounted battery described above may be provided with a fixed frame which is arranged on the upper surface of the bottom surface portion and to which the battery module is attached to supplement the strength of the bottom surface portion in the front-rear direction.
As a result, the impact applied to the bottom surface is absorbed by the fixed frame.

In the vehicle-mounted battery described above, the front wall portion is provided with a portion to which the reinforcing member and the front corner reinforcing frame are attached as a high-strength portion, and the upper end of the battery module is lower than the upper end of the high-strength portion. The lower end of the battery module may be located above the lower end of the high-strength portion.
As a result, the amount of deformation of the high-strength wall portion when a strong force is applied to the storage case is suppressed.

In the vehicle-mounted battery described above, a plurality of the fixed frame is provided on the left and right sides of the fixed frame, and the front corner reinforcing frame is a third front reinforcing portion that protrudes from the first front reinforcing portion and is attached to the front wall portion. The third front reinforcing portion may be located between the fixed frames in the left-right direction.
By providing the fixed frames separated from each other on the left and right, a space where a large battery can be stably arranged is secured. Further, since the third reinforcing portion is located between the plurality of fixed frames provided apart from each other, the portion while the fixed frames are not arranged is reinforced.

The vehicle-mounted battery described above may include a rear corner reinforcing frame that is attached inside the storage case so as to straddle at least the rear wall portion and the bottom surface portion.
As a result, the impact applied to the rear wall portion is easily transmitted to the bottom surface portion.

In the vehicle-mounted battery described above, the rear corner reinforcing frame straddles the rear surface wall portion and the first rear reinforcing portion attached so as to straddle the bottom surface portion, and the left and right side wall portions and the rear surface wall portion. It may have a pair of second rear reinforcing portions, which are attached in such a manner and are positioned apart from each other on the left and right sides, and the second rear reinforcing portion may be connected to the reinforcing member.
As a result, the impact applied to the rear wall portion is easily transmitted to the bottom surface portion and the left and right side wall portions.

In the vehicle-mounted battery described above, the protruding portion may have a U-shape having a cross-sectional shape that opens toward the outside of the storage case.
As a result, even if the high-rigidity portion and the front wall portion come into strong contact with each other and a part of the high-rigidity portion invades the inside of the storage case, the moving stroke of the high-rigidity portion can be obtained by the internal space of the protruding portion.

According to the present invention, when the high-rigidity portion and the front wall portion of the storage case come into contact with each other due to an impact from the rear of the vehicle, the portion of the storage case to which the protruding portion of the reinforcing member is attached comes into contact with the high-rigidity portion. As a result, it is possible to protect each part arranged inside the storage case.

It is a schematic side view which shows the mounting state of the vehicle-mounted battery which concerns on embodiment. It is a perspective view which shows the mounting state of an in-vehicle battery and the like. It is an exploded perspective view which shows the storage case and the member for reinforcement. It is an exploded perspective view which shows the member which is stored in the lower storage part of a storage case. It is sectional drawing which shows the state which attached the member for reinforcement to the storage case. It is sectional drawing which shows the arrangement state of each part with respect to a storage case. It is a perspective view which shows the arrangement state of each part with respect to the lower part of a storage case. It is a perspective view which shows the arrangement state of each part with respect to the upper stage of a storage case. It is a top view which shows the arrangement state of each part with respect to a storage case. It is a figure for demonstrating the positional relationship between the reinforcing member of a storage case and a cross member. It is a figure for demonstrating the positional relationship between the reinforcing member of a storage case, and the 1st part.

Hereinafter, embodiments for implementing the vehicle-mounted battery of the present invention will be described with reference to the accompanying drawings.

The vehicle-mounted battery 1 has a holding frame 2, a storage case 3, a cover body 4, and battery modules 5 and 5 (see FIGS. 1 to 4).

At least a part of the vehicle-mounted battery 1 is arranged on the floor panel 300 in the luggage compartment 200 located behind the rear seat 100 (see FIG. 1). The floor panel 300 is formed with an arrangement recess 301 opened upward in the luggage compartment 200. A fuel tank 400, rear suspensions 500, 500 and a muffler 600 are located below the floor panel 300. The fuel tank 400 is located below the rear seat 100.

The holding frame 2 is formed by connecting the first portions 6 and 6 extending left and right and separated from each other in the front-rear direction and the second portions 7 and 7 extending left and right and separated from each other in a grid shape. (See FIGS. 2 and 4). The left and right end portions 6a, 6a, ... Of the first portions 6, 6 are in a state of protruding laterally (outwardly) from the second portions 7, 7, respectively. The holding frame 2 is provided as a rectangular frame-shaped portion 8 except for the left and right end portions 6a, 6a, ... Of the first portions 6, 6.

Inside the storage case 3, a flat plate-shaped partition plate 9 for dividing the internal space into an upper space and a lower space is arranged. A notch 9a is formed on one side of the front end of the partition plate 9. In the storage case 3, the upper portion of the partition plate 9 is provided as the upper storage portion 10, and the lower portion of the partition plate 9 is provided as the lower storage portion 11. For example, two battery modules 5 and 5 are housed in the lower storage portion 11 so as to be separated from each other on the left and right sides. The two battery modules 5 and 5 are arranged close to the front side of the storage case 3.

The storage case 3 has a bottom surface portion 12 facing in the vertical direction and a peripheral surface portion 13 whose lower edge is continuous with the outer peripheral edge of the bottom surface portion 12. The peripheral surface portion 13 has a front wall portion 13a, a rear surface wall portion 13b, two side wall portions 13c and 13c, and a mounted portion 13d. The attached portion 13d is formed in a flange shape protruding outward from the upper edges of the front wall portion 13a, the rear wall portion 13b, and the side wall portions 13c and 13c.

The storage case 3 is inserted into the frame-shaped portion 8 of the holding frame 2 from above, the lower surface of the attached portion 13d is in contact with the upper surface of the frame-shaped portion 8, and the attached portion 13d is fastened to the frame-shaped portion 8 by bolts or the like to hold the storage case 3. It is fixed to the frame 2 (see FIG. 2).

A communication hole 4a is formed on one side of the front end of the cover body 4.

The vehicle-mounted battery 1 is arranged in the luggage compartment 200 with the lower stage including the lower storage portion 11 inserted into the arrangement recess 301 of the floor panel 300 (see FIGS. 1 and 2). Therefore, the upper stage including the upper storage portion 10 is located above the upper surface of the floor panel 300.

In the vehicle-mounted battery 1, both ends 6a, 6a, ... Of the first portions 6, 6 of the holding frame 2 are fixed to the floor panel 300 by bolts or the like.

The rear side frames 700 and 700 extending to the front and rear, which are the skeleton of the vehicle body, are located right next to the lower stage of the storage case 3, and the rear ends of the rear side frames 700 and 700 are located behind the vehicle-mounted battery 1. Bumper beams 800 extending to the left and right are arranged behind the rear side frames 700 and 700.

The space on the rear side of the storage case 3 in the luggage compartment 200 is formed as a crushable area 900.

As described above, by fixing the holding frame 2 to the floor panel 300, the lower storage portion 11 of the storage case 3 is arranged in the arrangement recess 301, and the lower storage portion 11 is located on the rear side separated from the left and right. It is located between frames 700, 700 (see FIGS. 1 and 2).

A plurality of members for improving the rigidity are attached to the storage case 3. Specifically, it will be described with reference to FIG.
Fixed frames 14, 14 and 14 are attached to the upper surface of the bottom surface portion 12 of the storage case 3 so as to be separated from each other on the left and right (see FIGS. 3 and 4). The fixed frame 14 has a flat plate-shaped arrangement surface portion 15 facing in the vertical direction, a U-shaped protruding portion 16 protruding upward from the arrangement surface portion 15 and having a cross-sectional shape opened downward, and the arrangement surface portion 15 and the protruding portion 16. A flat plate-shaped rear connecting portion 17 continuous with the rear end and facing in the front-rear direction is integrally formed. The projecting portion 16 is provided with one or two separated from each other to the left and right, and a portion of the upper surface portion of the projecting portion 16 excluding the front end portion is provided as a base portion 16a. The front end portion on the upper surface portion of the protruding portion 16 is provided as a front connecting portion 18. The fixed frame 14 is attached to the bottom surface portion 12 so that the protruding portion 16 extends back and forth.

Anti-deflection members 19 and 19 formed in a substantially U-shape that open upward are attached to the outer surface of the storage case 3 in a state of being separated from each other to the left and right. The bending prevention member 19 includes a first support portion 20 extending in the front-rear direction, a pair of second support portions 21, 21 extending substantially upward from the front end and the rear end of the first support portion 20, and a second support portion 21. The flange-shaped mounting portions 22 and 22 projecting forward or backward from the upper ends of the support portions 21 and 21 are provided.
The bending prevention member 19 has a hat-like cross-sectional shape orthogonal to the longitudinal direction. The first support portion 20 of the bending prevention member 19 has a substantially U-shaped protruding portion 23 having a cross-sectional shape orthogonal to the longitudinal direction opened upward, and a substantially horizontal protrusion from the upper end of the protruding portion 23. It is provided with flange-shaped bottom mounting portions 24, 24 (see FIG. 5).
The second support portion 21 has a substantially U-shaped projecting portion 25 having a cross-sectional shape orthogonal to the longitudinal direction opened laterally, and a flange-shaped projecting portion 25 extending laterally from both ends of the projecting portion 25. It is provided with side mounting portions 26, 26 (see FIGS. 3 and 4).

In the bending prevention member 19, the bottom surface mounting portion 24 of the first support portion 20 is attached to the bottom surface portion 12, and the side surface mounting portions 26, 26 of the second support portions 21, 21 are the front wall portion 13a and the rear surface wall portion 13b. The flange-shaped mounting portions 22 and 22 are mounted on the lower surface of the mounted portion 13d of the storage case 3 so as to be fixed to the storage case 3.

By fixing the bending prevention members 19 and 19 to the storage case 3, the storage case 3 is prevented from bending when the storage case 3 is inserted into the frame-shaped portion 8 and held by the holding frame 2, and the storage case 3 is prevented from bending. It is possible to secure a stable arrangement state of each part arranged inside the.

The bending prevention member 19 may be composed of two or more separate members. For example, one anti-deflection member 19 may be composed of two members, a rear member attached to the rear wall portion 13b and the bottom surface portion 12 and a front member attached to the front surface portion 13b and the bottom surface portion 12. Further, in this case, the rear member and the front member may be attached separately in the front-rear direction without being connected.

A front corner reinforcing frame 27 and a rear corner reinforcing frame 28 are attached to the inner surface of the storage case 3 to reinforce the corners.
The front corner reinforcing frame 27 includes a first front reinforcing portion 29 extending in the left-right direction, second front reinforcing portions 30 and 30 extending diagonally upward from both left and right ends of the first front reinforcing portion 29, and a first. The front reinforcing portion 29 is provided with third front reinforcing portions 31 and 31 extending substantially upward from the intermediate portion in the left-right direction and separated from each other to the left and right (see FIGS. 3 and 4).

The first front reinforcing portion 29, the second front reinforcing portion 30, and the third front reinforcing portion 31 are projected inward of the storage case 3 from the fixed surface portion 32 and the fixed surface portion 32 fixed to the storage case 3, respectively. It is provided with a protruding portion 33.
The first front reinforcing portion 29 and the second front reinforcing portion 30 have a W-shaped cross section orthogonal to the longitudinal direction. Both ends of the W-shape of the cross-sectional shape are fixed surface portions 32, and the portion between them is a protruding portion 33.
The third front reinforcing portion 31 has a hat-like cross-sectional shape orthogonal to the longitudinal direction. Both ends of the hat-shaped cross section are fixed surface portions 32, and the portions between them are projecting portions 33.

In the front corner reinforcing frame 27, the first front reinforcing portion 29 is attached at a position extending over the bottom surface portion 12 and the front wall portion 13a, and the second front reinforcing portions 30 and 30 are attached to the front wall portion 13a and the side wall portion 13c. It is attached to the storage case 3 by being attached at various positions and by attaching the third front reinforcing portions 31, 31 to the front wall portion 13a.
As shown in FIG. 5, the third front reinforcing portions 31, 31 are located between the fixed frames 14, 14 in the left-right direction.

By attaching the front corner reinforcing frame 27 to the storage case 3, the rigidity of the front wall portion 13a, the side wall portions 13c, 13c, and the bottom surface portion 12 of the storage case 3 is improved. Further, since the rigidity of the corner portion of the storage case 3 is increased, it is easy to maintain a state in which the bottom surface portion 12, the front wall portion 13a, and the side wall portions 13c and 13c are substantially orthogonal to each other.
Further, since the cross-sectional shape of the front corner reinforcing frame 27 is W-shaped or hat-shaped, the bottom surface portion 12, the front wall portion 13a, and the side wall portions 13c and 13c are substantially orthogonal to each other even when an impact is received. It is easy to keep the state.

The rear corner reinforcing frame 28 includes a first rear reinforcing portion 34 extending in the left-right direction, and second rear reinforcing portions 35, 35 extending diagonally upward from the left and right end portions of the first rear reinforcing portion 34, respectively. It is provided with a third rear reinforcing portion 36 extending substantially upward from the rear reinforcing portion 34 of the above (see FIGS. 3 and 4).

The first rear reinforcing portion 34, the second rear reinforcing portion 35, and the third rear reinforcing portion 36 are projected inward of the storage case 3 from the fixed surface portion 37 and the fixed surface portion 37 fixed to the storage case 3, respectively. It is provided with a protruding portion 38.
The third rear reinforcing portion 36 is provided with a fixed surface portion 37 and a protruding portion 38 as the reinforcing portion 39. Further, the third rear reinforcing portion 36 includes a mounting base portion 40 to which a partition plate 9 is attached, which is a surface portion extending substantially horizontally from the upper end of the reinforcing portion 39 and facing up and down.
The first rear reinforcing portion 34 and the second rear reinforcing portion 35 have a W-shaped cross section orthogonal to the longitudinal direction. Both ends of the W-shape of the cross-sectional shape are fixed surface portions 37, and the portion between them is a protruding portion 38.
The third rear reinforcing portion 36 has a hat-like cross-sectional shape orthogonal to the longitudinal direction. Both ends of the hat-shaped cross section are fixed surface portions 37, and the portion between them is a protruding portion 38.

In the rear corner reinforcing frame 28, the first rear reinforcing portion 34 is attached at a position extending over the bottom surface portion 12 and the rear surface wall portion 13b, and the second rear reinforcing portions 35, 35 are attached to the rear surface wall portion 13b and the side surface wall portion 13c. It is attached at various positions, and the third rear reinforcing portion 36 is attached to the rear wall portion 13b to be fixed to the storage case 3.

By attaching the rear corner reinforcing frame 28 to the storage case 3, the rigidity of the rear wall portion 13b, the side wall portions 13c, 13c, and the bottom surface portion 12 of the storage case 3 is improved. Further, since the rigidity of the corner portion of the storage case 3 is increased, it is easy to maintain a state in which the bottom surface portion 12, the rear surface wall portion 13b, and the side wall portions 13c and 13c are substantially orthogonal to each other.

A reinforcing member 41 is attached to the peripheral surface portion 13 of the storage case 3 so as to extend over the inner surfaces of the front wall portion 13a and the side wall portions 13c and 13c.
The reinforcing member 41 has a hat-shaped cross-sectional shape orthogonal to the longitudinal direction, and has a connecting portion 42 as a surface portion attached to each portion of the peripheral surface portion 13 and a connecting portion 42 protruding inward of the storage case 3. It is provided with a U-shaped protrusion 43 having a cross-sectional shape orthogonal to the longitudinal direction and opened toward the inner surface of the storage case 3. The connecting portion 42 and the protruding portion 43 of the reinforcing member 41 are joined to the upper ends of the second front reinforcing portions 30 and 30 of the front corner reinforcing frame 27 and the upper ends of the third front reinforcing portions 31 and 31. ..
The protruding portion 43 having a U-shaped cross section faces up and down and is projected downward from the mounting surface portion 44 on which the partition plate 9 is mounted and the inner end portion of the mounting surface portion 44 and faces front and back or left and right. It includes an intermediate surface portion 45 and a lower surface portion 46 that protrudes toward the storage case 3 from the lower end portion of the intermediate surface portion 45 and faces up and down.

The reinforcing member 41 has both a function of reinforcing the storage case 3 and a function of a mounting member for attaching the partition plate 9. Therefore, the vehicle-mounted battery 1 does not require a dedicated member for attaching the partition plate 9, and the structure can be simplified by reducing the number of parts.

By attaching the reinforcing member 41 to the peripheral surface portion 13 of the storage case 3, the strength of the storage case 3 is increased, and the protection of each portion arranged inside the storage case 3 can be strengthened.

As shown in FIG. 5, the arrangement surface portion 15 of the fixed frame 14 is attached to the upper surface of the bottom surface portion 12 of the storage case 3, and the bottom surface attachment portion 24 of the bending prevention member 19 is attached to the lower surface of the bottom surface portion 12. , The arrangement surface portion 15, the bottom surface mounting portion 24, and the bottom surface portion 12 are joined in a partially overlapped state.
As a result, the rigidity of the bottom surface portion 12 of the storage case 3 is increased.

Corner reinforcing members 47, 47, 47, 47 are attached to the attached portion 13d of the storage case 3 from the lower surfaces of the four corners to the upper end portion of the peripheral surface portion 13. The corner reinforcing member 47 is attached over a first attachment surface portion 47a attached to the attached portion 13d and two adjacent wall portions (for example, a front wall portion 13a and a side wall portion 13c) on the peripheral surface portion 13. It is provided with a surface portion 47b.

By attaching the corner reinforcing member 47 over two adjacent wall portions constituting the attached portion 13d and the peripheral surface portion 13, the rigidity of the storage case 3 can be increased, and the outer shape is formed when a load is applied such as in a collision. Can be easily maintained, and each part arranged inside can be protected. Further, since the mounted portion 13d is mounted over the peripheral surface 13, the angle of the mounted portion 13d with respect to the peripheral surface 13 is maintained, and a good holding state with respect to the frame-shaped portion 8 is ensured.

In the fixed frame 14, the front connecting portion 18 provided at the front end portion is connected to the first front reinforcing portion 29 of the front corner reinforcing frame 27, and the rear connecting portion 17 provided at the rear end portion is connected to the rear corner reinforcing frame 28. It is connected to the first rear reinforcing portion 34 of the above.
The fixed frame 14 is attached to the bottom surface portion 12 from the front corner reinforcing frame 27 attached to the front end portion of the storage case 3 to the rear corner reinforcing frame 28 attached to the rear end portion of the storage case 3. As a result, when the storage case 3 receives an impact from the rear, the amount of deformation of the bottom surface portion 12 can be suppressed, and damage to each component arranged inside the storage case 3 can be suppressed.
By connecting the front corner reinforcing frame 27, the fixed frame 14, and the rear corner reinforcing frame 28, it is easy to maintain a state in which the front wall portion 13a, the bottom surface portion 12, and the rear surface wall portion 13b of the storage case 3 are substantially orthogonal to each other. , Deformation and damage of the storage case 3 are suppressed.

In the front corner reinforcing frame 27, the upper ends of the second front reinforcing portions 30 and 30 are connected to the connecting portion 42 and the protruding portion 43 of the reinforcing member 41.
As a result, the rigidity of the front wall portion 13a on the peripheral surface portion 13 of the storage case 3 is increased, and deformation or damage of the front wall portion 13a can be suppressed. Further, since the third front reinforcing portions 31 and 31 of the front corner reinforcing frame 27 are connected to the connecting portion 42 and the protruding portion 43 of the reinforcing member 41, the strength of the front wall portion 13a is further improved. There is. Therefore, of the internal space 48 of the storage case 3, the front side portion is particularly secured even in the event of a collision, which increases the possibility of preventing damage or destruction of the battery module 5 arranged closer to the front side. be able to.

The internal space 48 of the storage case 3 is a space in which each part described later is stored in addition to the battery modules 5 and 5.

The battery module 5 has a box-shaped cell cover 49 having a longitudinal direction in the front-rear direction, and a plurality of battery cells 50, 50, ... Arranged side by side inside the cell cover 49 (FIG. See 4). The battery modules 5 and 5 are housed in the lower storage portion 11 of the storage case 3 in a state of being separated from each other to the left and right (see FIGS. 6 and 7).

The battery module 5 is arranged so as to straddle the base portions 16a, 16a of the protruding portions 16, 16 of the two adjacent fixed frames 14. The third front reinforcing portions 31 and 31 of the front corner reinforcing frame 27 are located between the fixed frames 14 and 14 in the left-right direction as described above. Therefore, the battery module 5 and the third front reinforcing portion 31 of the front corner reinforcing frame 27 are arranged at substantially the same position in the left-right direction.

By arranging the battery module 5 so as to straddle the bases 16a and 16a in this way, a space is provided between the bases 16a and 16a below the battery module 5 when the battery module 5 is arranged on the fixed frame 14. Is formed, and the heat dissipation property of the battery module 5 can be improved after stabilizing the arrangement state of the battery module 5.
Since the battery module 5 and the third front reinforcing portion 31 of the front corner reinforcing frame 27 are positioned substantially the same in the left-right direction, the front portion of the front wall portion 13a of the front wall portion 13a is less likely to be deformed. Therefore, the battery module 5 is less likely to be damaged due to the influence of the front wall portion 13a.

Further, since the fixed frames 14 and 14 are attached to the bottom surface 12 of the storage case 3 and the battery modules 5 and 5 are arranged on the fixed frames 14 and 14, the fixed frames 14 and 14 reinforce the bottom surface 12. In addition to the function, it functions as an arrangement unit for arranging the battery modules 5 and 5, and can stabilize the arrangement state of the battery modules 5 and 5 without increasing the number of parts.

The lower storage portion 11 of the storage case 3 houses the battery control unit 51 and the junction box 52 on opposite sides in the left-right direction with the battery modules 5 and 5 interposed therebetween. Therefore, the battery modules 5 and 5, the battery control unit 51, and the junction box 52 are housed in the lower stage in the internal space 48 of the storage case 3 and are located below the upper surfaces of the rear side frames 700 and 700 (see FIG. 6). The battery control unit 51 has a function of controlling the entire vehicle-mounted battery 1. The junction box 52 has a relay, a fuse, a connector terminal, and the like.

As described above, the lower storage portion 11 of the storage case 3 is located between the rear side frames 700 and 700, and the battery modules 5 and 5 housed in the lower storage portion 11, the battery control unit 51, and the junction box. 52 is also located between the rear side frames 700 and 700.

In the upper storage portion 10 of the storage case 3, the terminal block 53 and the pump inverter 54 of the electric oil pump are arranged side by side in the first half, and for the unit of the DC / DC converter 55 and the battery control unit 51 in the second half. Inverters 56 are arranged side by side (see FIGS. 6 and 8). Therefore, the terminal block 53, the pump inverter 54, the DC / DC converter 55, and the unit inverter 56 are housed in the upper stage in the internal space 48 of the storage case 3.

In the storage case 3, a service plug 57 is arranged on the front side of the junction box 52. The service plug 57 is located in the notch 9a of the partition plate 9. The service plug 57 is arranged at a position facing the communication hole 4a of the cover body 4 in a state where the cover body 4 is attached to the storage case 3.

As described above, the battery modules 5 and 5, the battery control unit 51, the junction box 52, the terminal block 53, the pump inverter 54, the DC / DC converter 55, and the unit inverter 56 are arranged inside the storage case 3. All the electrical components required for driving the vehicle-mounted battery 1 are arranged inside the storage case 3 in a state of being covered with the cover body 4.

Therefore, electromagnetic noise from the outside can be shielded from the electrical components required for driving the vehicle-mounted battery 1, and a good driving state of the vehicle-mounted battery 1 can be ensured by strengthening the electromagnetic shield.

Further, although each part such as the battery modules 5 and 5 is arranged in the internal space 48 of the storage case 3, there is a gap in the internal space 48 behind the battery modules 5, 5 and the battery control unit 51 and the junction box 52. Is formed, and this gap is formed as a rear space 48a (see FIG. 9).

The vehicle-mounted battery 1 is provided with an intake duct 58 (see FIG. 2). The intake duct 58 is located in a crushable area 900 formed on the rear side of the storage case 3 except for a part thereof, which penetrates the storage case 3. A heavy fan motor 59 is arranged inside the intake duct 58. The fan motor 59 is located at the same height as the lower storage portion 11 of the storage case 3, and is arranged between the rear side frames 700 and 700.

A cooling fan (not shown) is connected to the rotating shaft of the fan motor 59. The cooling fan has a function of taking in cooling air from the intake duct 58 by being rotated and sending it toward each part arranged inside the storage case 3, and the fan motor 59 has a function of rotating the cooling fan. There is.

The fan motor 59 is located in the crushable area 900, for example, directly behind the junction box 52 (see FIG. 9). Therefore, the fan motor 59 is located to the right of the right end of the battery module 5 arranged on the right side. The fan motor 59 may be located to the left of the left end of the battery module 5 arranged on the left side.

The vehicle-mounted battery 1 is provided with an exhaust duct 60 (see FIG. 2). The exhaust duct 60 penetrates the storage case 3 and is located on the side (left side) of the storage case 3 except for a part. Cooling air taken in from the intake duct 58 by the exhaust duct 60 and cooling each part arranged inside the storage case 3 is discharged to the outside of the storage case 3.

The flow of the cooling air discharged from the intake duct 58 through the inside of the storage case 3 by the exhaust duct 60 is forcibly performed by the cooling fan, and each part arranged inside the storage case 3, particularly the battery. Modules 5 and 5, the battery control unit 51, the junction box 52, and the like are efficiently cooled.

As shown in FIGS. 1 and 10, the cross member 61 is fixed to the lower surface side of the floor panel 300 in front of the vehicle-mounted battery 1.
The cross member 61 has a substantially hat shape in which the cross-sectional shape extending to the left and right and orthogonal to the longitudinal direction is opened upward.
The cross member 61 has a U-shaped cross-sectional shape that protrudes downward from one end of each of the connecting surface portions 62 and 62 that are attached to the floor panel 300 and faces in the vertical direction and is orthogonal to the longitudinal direction. It is provided with a U-shaped portion 63.

The connecting portion between the cross member 61 and the floor panel 300 is a portion having high rigidity. The overlapping portion between the connecting surface portion 62 on the rear end side of the cross member 61 and the floor panel 300 is provided as a high rigidity portion 64.

The positional relationship between the reinforcing member 41 and the high-rigidity portion 64 is shown in FIG. Specifically, the upper end H1t and the lower end H1u of the protruding portion 43 of the reinforcing member 41 and the upper end H2t and the lower end H2u of the high rigidity portion 64 are indicated by black dots.
The upper end H1t of the protruding portion 43 is located above the lower end H2u of the high rigidity portion 64. Further, the lower end H1u of the protruding portion 43 is located below the upper end H2t of the high rigidity portion 64.

That is, the high-rigidity portion 64 has a portion having at least a part having the same height as the protruding portion 43. For example, in the state shown in FIG. 10, the entire high-rigidity portion 64 is located between the upper end H1t and the lower end H1u of the protruding portion 43.
In the peripheral surface portion 13 of the storage case 3, the portion to which the reinforcing member 41 is attached has higher rigidity than the other portions. Therefore, even if the impact from the rear of the vehicle is large and the storage case 3 moves forward and collides with the high-rigidity portion 64, the high-rigidity portion 64 is a highly rigid portion. And the portion of the storage case 3 come into contact with each other, so that excessive movement of the vehicle-mounted battery 1 forward is restricted. Further, by restricting the excessive movement forward, the deformation and damage of the storage case 3 are reduced. That is, it is easy to secure an arrangement space for the battery module 5 arranged inside the storage case 3.

As another example in which at least a part of the high-rigidity portion 64 has the same height as the protruding portion 43, for example, the reinforcing member 41 is attached at a position lower than the state shown in FIG. Only the connecting surface portion 62 may be a portion having the same height as the protruding portion 43.
On the contrary, by mounting the reinforcing member 41 at a position higher than the state shown in FIG. 10, only the floor panel 300 of the high-rigidity portion 64 may be a portion having the same height as the protruding portion 43.
Further, only a part of the connecting surface portion 62 of the high rigidity portion 64 may be a portion having the same height as the protruding portion 43, or only a further part of the floor panel 300 of the high rigidity portion 64 protrudes. It may be a portion having the same height as the portion 43.
However, since the entire high-rigidity portion 64 has the same height as the protruding portion 43, the above-mentioned effect can be enjoyed to the maximum.

Of the first portions 6 and 6 of the holding frame 2, the positional relationship between the first portion 6 on the front side and the reinforcing member 41 in the vertical direction is shown in FIG. Specifically, the upper end H1t and the lower end H1u of the protruding portion 43 of the reinforcing member 41, and the upper end H3t and the lower end H3u of the first portion 6 on the front side are indicated by black dots.
The upper end H1t of the protruding portion 43 is located above the lower end H3u of the first portion 6 on the front side. Further, the lower end H1u of the protruding portion 43 is located below the upper end H3t of the first portion 6 on the front side.

That is, the first portion 6 on the front side has at least a portion having the same height as the protruding portion 43. In the state shown in FIG. 11, a part of the first portion 6 on the front side has the same height as the protruding portion 43.
As a result, when an impact is applied to the storage case 3 from the rear, the impact is easily transmitted from a part of the highly rigid peripheral surface portion 13 to which the reinforcing member 41 is attached to the holding frame 2.
Therefore, the amount of deformation and damage of the storage case 3 are suppressed, and the living space of the battery module 5 arranged inside the storage case 3 can be easily secured.

The same effect as described above can be obtained even if all of the first portion 6 on the front side is located between the upper end H1t and the lower end H1u of the protruding portion 43.

As described above, the vehicle-mounted battery 1 is formed by at least a part of a pair of first portions 6 and 6 separated from each other in the front-rear direction and at least a part of a pair of second parts 7 and 7 separated from each other to the left and right. The holding frame 2 having the configured frame-shaped portion 8 and being fixed to the vehicle body, and the arrangement recess 301 formed in the floor panel 300 by being held by the holding frame 2 in a state of being inserted into the frame-shaped portion 8. A storage case 3 having a front wall portion 13a, a rear wall portion 13b, left and right side wall portions 13c, 13c, and a bottom portion 12 arranged, and a battery module 5 housed in the storage case 3 and having a battery cell 50 arranged inside. From the partition plate 9 that divides the internal space 48 of the storage case 3 into the upper space and the lower space, and the connecting portion 42 and the connecting portion 42 that are connected to the front wall portion 13a and the left and right side wall portions 13c and 13c. A reinforcing member 41 having a protruding portion 43 having a protruding portion 43 on which the partition plate 9 is placed is provided, and the connecting surface portion 62 of the cross member 61 is coupled to the floor panel 300 in front of the storage case 3, and the floor panel 300 is provided. And the cross member 61 are provided as a high-rigidity portion 64, the upper end of the protruding portion 43 is located above the lower end of the high-rigidity portion 64, and the lower end of the protruding portion 43 is below the upper end of the high-rigidity portion 64. It is located in.
As a result, when the high-rigidity portion 64 and the front wall portion 13a of the storage case 3 come into contact with each other due to an impact from the rear of the vehicle, for example, the portion of the storage case 3 to which the protruding portion 43 of the reinforcing member 41 is attached is the high-rigidity portion. Contact with 64.
Since the portion to which the reinforcing member 41 is attached is a portion of the front wall portion 13a that is considered to have particularly high strength, even if it comes into contact with the high-rigidity portion 64 that is the joint portion between the floor panel 300 and the cross member 61. Deformation and damage of the front wall portion 13a due to impact are reduced.

As described with reference to FIG. 4 and the like, inside the storage case 3, the first front reinforcing portion 29 attached so as to straddle the front wall portion 13a and the bottom surface portion 12, and the left and right side wall portions 13c and 13c and the front wall. Even if it has a pair of second front reinforcing portions 30 and 30 that are attached so as to straddle the portions 13a and are positioned apart from each other on the left and right, and a front corner reinforcing frame 27 that is coupled to the reinforcing member 41. Good.
As a result, the impact transmitted to the front wall portion 13a is easily transmitted to the reinforcing member 41 via the front corner reinforcing frame 27.
Therefore, since the rigidity of the front wall portion 13a is increased, even if the storage case 3 moves forward due to an impact from the rear and the front wall portion 13a comes into contact with the high rigidity portion 64, the front wall portion 13a is deformed. The amount and damage are suppressed. Then, the battery module 5 arranged inside is less likely to be damaged.

As described with reference to FIGS. 3 and 4, a fixed frame 14 arranged on the upper surface of the bottom surface portion 12 to which the battery module 5 is attached to supplement the strength of the bottom surface portion 12 in the front-rear direction is provided, and the fixed frame 14 and the front corner reinforcing frame are provided. 27 may be combined.
As a result, the impact applied to the bottom surface portion 12 is easily transmitted to the front wall portion 13a and the reinforcing member 41 via the front corner reinforcing frame 27.
Further, the strength of the bottom surface portion 12 and the front wall portion 13a of the storage case 3 can be improved. Therefore, it is possible to reduce the possibility that the battery module 5 arranged inside the storage case 3 strongly collides with the front wall portion 13a of the storage case 3 or jumps out of the storage case 3 due to an impact from the rear. ..

As described with reference to FIGS. 3 and 4, a fixed frame 14 arranged on the upper surface of the bottom surface portion 12 to which the battery module 5 is attached to supplement the strength of the bottom surface portion 12 in the front-rear direction may be provided.
As a result, the impact applied to the bottom surface portion 12 is absorbed by the fixed frame 14.
That is, the rigidity of the bottom surface portion 12 of the storage case 3 is increased. Therefore, for example, even if an impact from the rear of the vehicle is applied to the storage case 3, the amount of deformation and damage of the bottom surface portion 12 can be suppressed, and damage to the battery module 5 can be suppressed.

As described in each figure, the front wall portion 13a is provided with a portion to which the reinforcing member 41 and the front corner reinforcing frame 27 are attached as a high-strength portion, and the upper end of the battery module 5 is below the upper end of the high-strength portion. The lower end of the battery module 5 may be located above the lower end of the high-strength portion.
As a result, the amount of deformation of the high-strength portion when a strong force is applied to the storage case 3 is suppressed.
Therefore, it is possible to prevent damage to each member arranged in the internal space 48 of the storage case 3.

As described with reference to FIG. 5 and the like, a plurality of fixed frames 14 and 14 are provided so as to be separated from each other on the left and right sides, and the front corner reinforcing frame 27 protrudes from the first front reinforcing portion 29 and is attached to the front wall portion 13a. The front reinforcing portion 31 of the above is provided, and the third front reinforcing portion 31 may be located between the fixed frames 14 in the left-right direction.
By providing the fixed frame 14 at a distance from the left and right, a space where a large battery can be stably arranged is secured. Further, since the third reinforcing portion 31 is located between the plurality of fixed frames 14 and 14 provided apart from each other, the portion while the fixed frame 14 is not arranged is reinforced.
Therefore, damage and deformation of the front wall portion 13a of the storage case 3 can be uniformly suppressed, and damage to each portion arranged inside the storage case 3 can be prevented. Further, the strength of the front wall portion 13a is uniformly improved.
Further, as shown in the embodiment, when the battery module 5 is mounted so as to straddle the two fixed frames 14, 14, the center of the battery module 5 and the third front in the left-right direction. The centers of the reinforcing portions 31 are at substantially the same position. That is, since the strength of the portion of the front wall portion 13a located in front of the battery module 5 is increased, the possibility that the battery module 5 is damaged due to the deformation of the front wall portion 13a can be further reduced. ..

As described with reference to FIGS. 3 and 4, the rear corner reinforcing frame 28 may be provided inside the storage case 3 so as to straddle at least the rear wall portion 13b and the bottom surface portion 12.
As a result, the impact applied to the rear wall portion 13b is easily transmitted to the bottom surface portion 12.
Therefore, the rear wall portion 13b is less likely to be deformed by the impact from the rear. In particular, since the rear corner reinforcing frame 28 is attached below the rear wall portion 13b, the strength of the lower portion of the rear wall portion 13b is particularly improved. Therefore, it is difficult for the bottom surface portion 12 of the storage case 3 to be deformed due to an impact from the rear, and the battery module 5 arranged on the bottom surface portion 12 is less likely to be damaged.

As described with reference to FIGS. 3 and 4, the rear corner reinforcing frame 28 includes a first rear reinforcing portion 34 attached so as to straddle the rear wall portion 13b and the bottom surface portion 12, and left and right side wall portions 13c and 13c. It has a pair of second rear reinforcing portions 35, 35 which are attached so as to straddle the rear wall portion 13b and are positioned apart from each other on the left and right, and the second rear reinforcing portion 34 is coupled to the reinforcing member 41. May be.
As a result, the impact applied to the rear wall portion 13b is easily transmitted to the bottom surface portion 12 and the left and right side wall portions 13c and 13c.
Therefore, even if an impact from the rear is applied to the storage case 3, it is possible to increase the possibility that the living space of the battery module 5 arranged inside is secured.

As described with reference to FIG. 10 and the like, the projecting portion 43 may have a cross-sectional shape of a U-shape that opens toward the outside of the storage case 3.
As a result, even if the high-rigidity portion 64 and the front wall portion 13a come into strong contact with each other and a part of the high-rigidity portion 64 invades the inside of the storage case 3, the moving stroke of the high-rigidity portion 64 due to the internal space of the protruding portion 43. Can be earned.
That is, it is possible to reduce the possibility that the high-rigidity portion 64 moves to the rear of the mounting portion 43 and the members arranged in the storage case 3 are damaged.

1 ... In-vehicle battery, 2 ... Holding frame, 3 ... Storage case, 5 ... Battery module, 6 ... 1st part, 7 ... 2nd part, 8 ... Frame-shaped part, 9 ... Partition plate, 12 ... Bottom part , 13a ... front wall part, 13b ... rear wall part, 13c ... side wall part, 14 ... fixed frame, 27 ... front corner reinforcement frame, 28 ... rear corner reinforcement frame, 29 ... first front reinforcement part, 30 ... first 2 front reinforcing portion, 31 ... third front reinforcing portion, 34 ... first rear reinforcing portion, 35 ... second rear reinforcing portion, 41 ... reinforcing member, 42 ... connecting portion, 43 ... protruding portion, 48 ... Internal space, 50 ... battery cell, 61 ... cross member, 62 ... joint surface, 64 ... high rigidity, 300 ... floor panel, 301 ... placement recess

Claims (9)

A holding frame having a frame-like portion composed of at least a part of a pair of first parts separated in the front-rear direction and at least a part of a pair of second parts separated in the left-right direction and fixed to the vehicle body. ,
A storage having a front wall portion, a rear wall portion, left and right side wall portions, and a bottom surface portion arranged in an arrangement recess formed on the floor panel by being held by the holding frame in a state of being inserted into the frame-shaped portion. With the case
A battery module that is stored in the storage case and has a battery cell inside.
A partition plate that divides the internal space of the storage case into an upper space and a lower space,
It is provided with a reinforcing member having a connecting portion as a connecting portion to the front wall portion and the left and right side wall portions, and a protruding portion protruding from the connecting portion and having the partition plate mounted on the upper surface.
In front of the storage case, the connecting surface portion of the cross member is joined to the floor panel.
The joint portion between the floor panel and the cross member is provided as a high-rigidity portion.
An in-vehicle battery in which the upper end of the protruding portion is located above the lower end of the high-rigidity portion and the lower end of the protruding portion is located below the upper end of the high-rigidity portion. Inside the storage case, a first front reinforcing portion that is attached so as to straddle the front wall portion and the bottom surface portion, and the left and right side wall portions and the front wall portion that are attached so as to straddle the front wall portion and are separated from each other to the left and right. The vehicle-mounted battery according to claim 1, further comprising a pair of second front reinforcing portions located above the battery and a front corner reinforcing frame coupled to the reinforcing member. A fixed frame arranged on the upper surface of the bottom surface portion to which the battery module is attached and supplementing the strength of the bottom surface portion in the front-rear direction is provided.
The vehicle-mounted battery according to claim 2, wherein the fixed frame and the front corner reinforcing frame are combined. The vehicle-mounted battery according to any one of claims 1 to 3, further comprising a fixed frame arranged on the upper surface of the bottom surface portion and to which the battery module is attached to supplement the strength of the bottom surface portion in the front-rear direction. The front wall portion is provided with a portion to which the reinforcing member and the front corner reinforcing frame are attached as a high-strength portion.
The second or third aspect of the present invention, wherein the upper end of the battery module is located below the upper end of the high-strength portion and the lower end of the battery module is located above the lower end of the high-strength portion. In-vehicle battery. A plurality of the fixed frames are provided separately on the left and right,
The front corner reinforcing frame has a third front reinforcing portion that protrudes from the first front reinforcing portion and is attached to the front wall portion.
The vehicle-mounted battery according to claim 3, wherein the third front reinforcing portion is located between the fixed frames in the left-right direction. The vehicle-mounted battery according to any one of claims 1 to 6, further comprising a rear corner reinforcing frame attached inside the storage case so as to straddle at least the rear wall portion and the bottom surface portion. The rear corner reinforcing frame is attached so as to straddle the rear surface wall portion and the first rear surface reinforcing portion, and the left and right side wall portions and the rear surface wall portion, and is separated from each other to the left and right. With a pair of second rear reinforcements, located
The vehicle-mounted battery according to claim 7, wherein the second rear reinforcing portion is coupled to the reinforcing member. The vehicle-mounted battery according to any one of claims 1 to 8, wherein the protruding portion has a U-shape having a cross-sectional shape that opens toward the outside of the storage case.

Images