JP6525657B2 - Automotive battery - Google Patents

Description

  The present invention relates to the technical field of an on-board battery mounted in a vehicle such as a car.

JP, 2006-335243, A

  Various vehicles such as automobiles are equipped with an on-vehicle battery for supplying electric power to a motor and various electric components.

  In recent years, vehicles such as EVs (Electric Vehicles) and HEVs (Hybrid Electric Vehicles) and PHEVs (Plug-in Hybrid Electric Vehicles) have been in widespread use in particular. In a vehicle powered by electricity, an on-vehicle battery having a high power storage function is mounted.

  The on-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 or a lithium ion battery, for example. It is done. Further, in the case of an on-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 high storage capability, and each battery cell of the plurality of battery modules is connected in series or Connected in parallel.

  Since such a vehicle-mounted battery is provided with a control device that generates high voltage internally to control each part such as a battery module, damage to these control devices or the like is possible even in the event of a collision of a vehicle or the like. It is necessary to prevent damage.

  Therefore, to protect the control device disposed inside the storage case, a support frame extending to the left and right is attached to the outer surface of the storage case, and the left and right end portions of the support frame are parts of the vehicle body. There are some which were each couple | bonded with the pair of side frames provided as (refer patent document 1).

  By connecting both ends of the support frame attached to the storage case in this manner to the pair of side frames, it becomes possible to arrange the in-vehicle battery in a strong state with respect to the vehicle body, and inside the storage case It is possible to protect deployed control devices.

  However, in the case of the on-vehicle battery described in Patent Document 1, since the left and right end portions of the support frame are coupled to the pair of side frames, the strength in the left and right direction is increased, but the strength in the front and rear direction is insufficient. For example, there is a possibility that the control device disposed inside the storage case can not be sufficiently protected at the time of a rear collision with the vehicle.

  In particular, since a high voltage may be leaked if damage or the like occurs at the time of a collision of a vehicle, a control device that generates a high voltage needs to ensure a sufficient protection state to avoid danger.

  Accordingly, the present invention aims to overcome the above-mentioned problems and to improve the protection state of the control device.

The on-vehicle battery according to the present invention includes a storage case having a hollow cross section and formed by combining a plurality of panels, a battery module in which a plurality of battery cells are disposed inside and stored in the storage case, and the storage A control device which is housed in a case and controls the battery module, and two reinforcing bars which are disposed inside the storage case and both ends thereof are respectively coupled to the two panels, one reinforcing bar extends in the front and back direction The other reinforcing bar is disposed in the left and right extending state, and the control device is disposed at a position surrounded by the two reinforcing bars and the two panels from the front, rear, left and right, and the two reinforcing bars are disposed. It is disposed in a state of being crossed in the vertical direction .

As a result, the panel and the reinforcing bar are positioned on the front, rear, left and right of the control device, and the control device is protected in the front and rear direction and the left and right direction by the panel and the reinforcing bar. Further, the two reinforcing bars increase the impact resistance in the front-rear direction and the left-right direction of the storage case. Also, the two reinforcing bars are disposed inside the storage case without interfering with each other.

In the on-vehicle battery according to the present invention, it is desirable that the reinforcing bar is formed in a tubular shape having a hollow cross section.

  This increases the stiffness of the reinforcing bar.

In the on-vehicle battery according to the present invention, it is desirable that the control device be disposed at a front end portion inside the storage case.

  Thus, the control device is disposed at a position spaced forward from the rear end of the vehicle.

According to another embodiment of the present invention, there is provided a storage case having a hollow cross section and formed by combining a plurality of panels, and a battery module in which a plurality of battery cells are disposed and stored in the storage case. The control device includes a control device which is stored in the storage case and controls the battery module, and at least one reinforcing bar which is disposed in the storage case and both ends of which are coupled to two of the panels. An impact-resistant bar which is disposed at a position surrounded by the one panel and at least one of the reinforcing bars from the front, rear, left, and right, extends to the left and right, and both ends are connected to the vehicle body is positioned right above the control device. is there.

  As a result, the impact resistance bar in the left-right direction of the vehicle is improved.

In the on-vehicle battery according to the present invention, it is desirable that the impact resistant bar is formed in a tubular shape having a hollow cross section.

  This increases the rigidity of the impact resistant bar.

In the on-vehicle battery according to the present invention, it is preferable that a bracket for holding the control device is provided, and the control device is attached to the panel via the bracket.

  Thus, the panel functioning as a part of the storage case also functions as an attachment member for attaching the control device.

In the on-vehicle battery according to the present invention, it is preferable that a bracket for holding the control device is provided, and the control device is attached to the reinforcing bar via the bracket.

  Thus, the reinforcing bar that reinforces the storage case also functions as an attachment member for attaching the control device.

In the on-vehicle battery according to the present invention, it is preferable that a bracket for holding the control device is provided, and the control device is attached to the panel and the reinforcing bar via the bracket.

  Thus, the panel functioning as a part of the storage case and the reinforcing bar reinforcing the storage case also function as an attachment member for mounting the control device.

In the on-vehicle battery according to the present invention, it is desirable that a space be formed below the control device inside the storage case.

  Thus, the space is used as an arrangement space for each part arranged inside the storage case.

In the on-vehicle battery according to the present invention, it is desirable that at least a part of the battery module be attached to the reinforcing bar.

  Thus, the reinforcing bar that reinforces the storage case also functions as an attachment member for attaching the battery module.

Furthermore, another battery according to the present invention includes a storage case having a hollow cross section and formed by combining a plurality of panels, and a battery module in which a plurality of battery cells are disposed and stored in the storage case. A control device for controlling the battery module stored in the storage case, and at least one reinforcing bar disposed inside the storage case and having both ends coupled to the two panels, the control device Is arranged at a position surrounded by the at least one panel and the at least one reinforcing bar from the front, rear, left, and right, and the control device is provided as a part of the lower structure of the vehicle body and above at least a sub frame supporting the suspension. It is located.

  Thereby, the impact resistance in the left-right direction of the vehicle is enhanced by the sub-frame.

  According to the present invention, the panel and the reinforcing bar are positioned on the front and rear, right and left of the control device, and the control device is protected in the front and rear direction and the left and right direction by the panel and the reinforcing bar. it can.

FIGS. 2 to 11 show an embodiment of the in-vehicle battery according to the present invention, and this figure is a plan view showing the positional relationship between the lower structure of the vehicle body and the in-vehicle battery. It is a schematic front view which shows a part of vehicle body and a vehicle-mounted battery. FIG. 6 is a side view showing a cross section of a part of the in-vehicle battery together with a rear seat. It is a perspective view which shows the arrangement | positioning state of the vehicle-mounted battery with respect to a vehicle. It is a schematic perspective view of the vehicle-mounted battery which isolate | separates and shows a cover part. It is a perspective view of the vehicle-mounted battery which shows a cover part in isolation in the state seen from the direction different from FIG. It is a schematic side view which shows the arrangement | positioning state of a battery module etc. with respect to a storage case. It is a perspective view which shows the example of the structure of a panel. It is a perspective view which shows the example of another structure of a panel. FIG. 2 is a schematic exploded perspective view of a battery module and the like. It is a schematic plan view of the vehicle-mounted battery shown in the state which removed the cover part.

  First, a schematic configuration of a vehicle (vehicle body) on which the on-vehicle battery according to the present invention is mounted will be described (see FIG. 1).

  As shown in FIG. 1, the vehicle body 100 is positioned on the rear side of the cross member 102 and the cross member 102 positioned between the rear side members 101 and 101 and the rear side members 101 and 101 spaced apart to the left and right. And the subframe 103.

  The rear side members 101, 101 are disposed to extend in the front and back direction. The cross member 102 extends leftward and rightward, and both left and right ends thereof are fixed to the rear side members 101 and 101, respectively. The sub-frame 103 extends leftward and rightward, and both left and right ends are fixed to the rear side members 101 and 101, respectively.

  Suspensions 104 are fastened to the left and right sides of the sub-frame 103, respectively. The suspension 104 has a shock absorber 104a extending substantially in the vertical direction, an arm 104b connected to the lower end of the shock absorber 104a, and a spring 104c supported by the shock absorber 104a.

  The hub unit 105 is coupled to the arm 104 b, and the wheel 106 is attached to the hub unit 105.

  A rear floor panel 107 is disposed above the cross member 102 and the sub frame 103, and wheel aprons 108 and 108 are provided continuously to the left and right of the rear floor panel 107 (see FIG. 2). The rear floor panel 107 is formed with a concave portion 107a opened upward (see FIG. 3). The wheel aprons 108, 108 are positioned to cover a portion of the wheels 106, 106, respectively.

  An impact resistant bar 109 extending in the left-right direction is disposed between the wheel aprons 108 and 108, and the impact resistant bar 109 is formed of a rigid metal material. The left and right ends of the impact resistant bar 109 are fixed to the wheel aprons 108, 108. The impact resistant bar 109 is formed in a square tube shape at least except for both end portions and has a hollow cross section (see FIG. 3).

  A rear seat 200 is installed on the rear floor panel 107, and the rear seat 200 has a seat cushion 201 and a backrest 202 (see FIGS. 3 and 4). The backrest 202 is inclined to be displaced rearward as it goes upward. A fuel tank (not shown) is disposed below the rear seat 200.

  A space on the rear side of the rear seat 200 above the rear floor panel 107 is formed as a luggage compartment 300 (see FIG. 3). In the luggage compartment 300, a recess 107a formed in the rear floor panel 107 is positioned.

  Next, the configuration of the in-vehicle battery will be described.

  The on-vehicle battery 1 is disposed in a recess 107a formed in the rear floor panel 107 (see FIG. 3).

  The on-vehicle battery 1 has a storage case 2 and battery modules 3, 3,... (See FIGS. 5 to 7).

  The storage case 2 has a box-shaped storage portion 4 opened upward and a lid 5 for closing the opening of the storage portion 4.

  The housing portion 4 is a front panel 6 facing in the front and rear direction, a rear panel 7 located on the rear side of the front panel 6 facing in the front and rear direction, a side panel 8 located separately from the left and right, and a bottom panel 9 facing in the vertical direction And. The front panel 6, the rear panel 7, the side panels 8, 8 and the bottom panel 9 are all formed by extrusion of, for example, aluminum.

  The front panel 6, the rear panel 7, the side panels 8, 8 and the bottom panel 9 all have hollow cross-sectional shapes (see FIG. 8). The front panel 6, the rear panel 7, the side panels 8, 8 and the bottom panel 9 have, for example, a flat plate portion 10 facing in the front-rear direction, the left-right direction, or the up-down direction and a hollow portion 11 formed in a square tube shape There is. The hollow portion 11 is formed in the shape of a hollow cross section, and the hollow portion 11 is in a state of being penetrated in the left-right direction or the front-rear direction.

  The front panel 6, the rear panel 7, the side panels 8, 8 and the bottom panel 9 may be formed, for example, in a shape in which a plurality of hollow portions 11, 11,. See Figure 9).

  As described above, the front panel 6, the back panel 7, the side panels 8, 8 and the bottom panel 9 all have hollow portions 11, and at least a part of the cross-sectional shape is made into a rectangular tube shape, so high rigidity It is secured. Therefore, the overall strength of the storage portion 4 of the storage case 2 constituted by the front panel 6, the rear panel 7, the side panels 8, 8 and the bottom panel 9 in which high rigidity is secured is high.

  The bottom panel 9 is provided as an upper portion 9a whose front end is at a position one step higher than the other portions (see FIG. 7). The bottom panel 9 is provided as a stepped portion 9b whose rear side portion continuous with the upper stage portion 9a is directed substantially in the front-rear direction, and a rear side portion continuous with the stepped portion 9b is provided as a lower stage portion 9c.

  The lid 5 has a substantially flat first closing plate 12 facing in the vertical direction and a second closing plate 13 closing the front end of the opening of the storage case 2 (see FIGS. 5 to 7). . The lid portion 5 has a shape or hollow portion in which the first closing plate 12 and the second closing plate 13 have a flat portion and a hollow portion formed in a rectangular cylindrical shape by extrusion molding, like the front panel 6 etc. It may be formed in the shape provided.

  The first closing plate 12 closes a portion of the opening of the storage portion 4 other than the front end portion from above, and the second closing plate 13 closes the front end portion of the opening of the storage portion 4. The second closing plate 13 has an upper vertical portion 13a facing in the front and rear direction, and a horizontal portion 13b projecting forward from the lower end of the upper vertical portion 13a and an inclined portion 13c projecting obliquely forward and downward from the front end of the horizontal portion 13b. And a lower vertical portion 13d which protrudes downward from the lower end portion of the inclined portion 13c and faces in the front-rear direction. The upper end of the second closing plate 13 is connected to the front end of the first closing plate 12 and the lower end is connected to the upper end of the front panel 6.

  At the position near the right end of the second closing plate 13, an opening 13 e which is vertically penetrated is formed.

  The upper vertical portion 13a and the horizontal portion 13b of the second closing plate 13 form an arrangement space 14 opened forward, upward, leftward and rightward in the loading chamber 300 (see FIGS. 3 and 7). ). In the placement space 14, portions other than the left and right end portions of the impact resistant bar 109 are disposed.

  For example, five battery modules 3, 3,... Are stored in the storage case 2 side by side in the front and rear direction. As the battery modules 3, 3,..., The first battery module 3A located on the front side and the second battery module 3B and the second battery module located on the rear side of the first battery module 3A. A third battery module 3C located on the rear side of 3B and a fourth battery module 3D located on the rear side of the first battery module 3A and directly above the second battery module 3B, and a fourth A fifth battery module 3E located on the rear side of the battery module 3D and located directly above the third battery module 3C is provided.

  The first battery module 3A, the second battery module 3B, the third battery module 3C, the fourth battery module 3D, and the fifth battery module 3E are connected in series by an electric wire described later.

  The battery module 3 has a case body 15 and a plurality of battery cells 16, 16... Housed inside the case body 15 (see FIG. 10).

  The case body 15 is formed in a horizontally long box shape opened upward. In the case body 15, a discharge hole 15a which is penetrated in the front and back direction is formed in the front surface part, and an intake hole 15b which is penetrated in the front and back direction is formed in the rear surface part.

  The battery cells 16, 16,... Are held inside the case body 15 in a state in which the battery cells 16, 16. In the state where the battery cells 16, 16,... Are held by the case body 15, fixed gaps are respectively formed between the battery cells 16, 16,. The battery cells 16, 16, ... are connected in series.

  A smoke exhaust pipe 17 extending to the left and right is attached to the case body 15. The smoke exhaust pipe 17 has a base plate portion 17a facing in the vertical direction and a cylindrical portion 17b positioned on the upper surface of the base plate portion 17a. The cylindrical portion 17 b is located at the center of the base plate portion 17 a in the front-rear direction. The smoke exhaust pipe 17 is attached to the case body 15 in a state in which the base plate portion 17 a closes the upper opening of the case body 15.

  Gas flow holes (not shown) are formed on the lower surface of the exhaust pipe 17 at equal intervals on the left and right. In the flue gas pipe 17, the gas flow holes are positioned directly above the battery cells 16, 16,.

  At the front and rear end portions of the base plate portion 17 a of the smoke exhaust pipe 17, substrates 18 formed in a horizontally long shape are attached. Wires to be described later are connected to the substrates 18, respectively, and electrical control or the like to the battery cells 16 is performed via the wires and the substrates 18.

  The battery cells 16, 16,... Are provided with valves (not shown) that can communicate with the inside, and the valves are in communication with the gas flow holes of the exhaust pipe 17. If an abnormality occurs in the battery cell 16, gas may be generated internally. However, when gas is generated, the internal pressure of the battery cell 16 increases and the valve is opened, and the generated gas flows from the valve to the gas flow hole Flow to the flue pipe 17 through the

  The battery modules 3, 3,... Are disposed at predetermined positions inside the storage case 2 (see FIG. 7). The second battery module 3B and the third battery module 3C are disposed in the lower stage, the fourth battery module 3D and the fifth battery module 3E are disposed in the upper stage, and the first battery module 3A is the second battery module The third battery module 3C, the fourth battery module 3D, and the fifth battery module 3E are disposed in the middle stage.

  At the time of driving the battery modules 3, 3,..., The cooling air is taken in by the first intake unit 19 and the second intake unit 20 into the battery modules 3, 3,. 7).

  The first intake unit 19 has a first intake duct 21, a first intake fan 22, a first intake pipe 23, and first joint ducts 24, 24, 24.

  The first intake duct 21 has a function of taking in cooling air to the inside of the first battery module 3A, the second battery module 3B, and the third battery module 3C. The first joint ducts 24, 24 and 24 and the case body 15 of which the lower end portion of the first intake duct 21 is branched into three in the left and right direction and the branched portions are respectively disposed inside the storage case 2, The interiors of the first battery module 3A, the second battery module 3B, and the third battery module 3C are in communication with each other through intake holes 15b, 15b, 15b respectively formed in the rear face portions 15, 15.

  The first intake fan 22 is connected to the upper end of the first intake duct 21.

  The lower end portion of the first intake pipe 23 is connected to the first intake fan 22. Therefore, when the first intake fan 22 is rotated, the cooling air is taken in from the first intake pipe 23, and the taken-in cooling air flows toward the first intake duct 21.

  The second intake unit 20 includes a second intake duct 25, a second intake fan 26, a second intake pipe 27, and second joint ducts 28.

  The second intake duct 25 has a function of taking in the cooling air into the fourth battery module 3D and the fifth battery module 3E. The lower end portion of the second intake duct 25 is branched into two in the left-right direction, and the branched portions are respectively disposed in the second joint ducts 28 and 28 and the case bodies 15 and 15 disposed inside the storage case 2. It communicates with the inside of the fourth battery module 3D and the fifth battery module 3E through the intake holes 15a, 15a respectively formed in the rear surface portion.

  The second intake fan 26 is connected to the upper end of the second intake duct 25.

  The lower end portion of the second intake pipe 27 is connected to the second intake fan 26. Therefore, when the second intake fan 26 is rotated, the cooling air is taken in from the second intake pipe 27, and the taken-in cooling air flows toward the second intake duct 25.

  When the first intake fan 22 and the second intake fan 26 are rotated, the air existing from the first intake pipe 23 and the second intake pipe 27 to the outside of the storage case 2 is used as the cooling air. It is taken into the first intake duct 21 and the second intake duct 25.

  The cooling air taken into the first intake duct 21 flows through the first joint ducts 24, 24, 24 and the first battery from the intake holes 15b, 15b, 15b of the case bodies 15, 15, 15 respectively. It is discharged into the inside of the module 3A, the second battery module 3B and the third battery module 3C.

  The cooling air discharged into the first battery module 3A, the second battery module 3B and the third battery module 3C is directed forward through the gaps formed between the battery cells 16, 16,. The cooling air cools the battery cells 16, 16,. The cooling air directed forward through the gaps formed between the battery cells 16, 16, ... is discharged from the discharge holes 15a, 15a, 15a of the case bodies 15, 15, 15 respectively to the internal space of the storage case 2 Be done.

  On the other hand, the cooling air taken into the second intake duct 25 flows through the second joint ducts 28, 28 and the fourth battery module 3D and the fourth battery module 3D from the intake holes 15b, 15b of the case bodies 15, 15, respectively. It is discharged into the inside of the fifth battery module 3E.

  The cooling air discharged to the inside of the fourth battery module 3D and the fifth battery module 3E goes forward through the gap formed between the battery cells 16, 16,. , 16, ... cooling is performed. The cooling air directed forward through the gaps formed between the battery cells 16, 16 ... is discharged from the discharge holes 15a of the case bodies 15, 15 into the internal space of the storage case 2 respectively (see FIG. See the arrow shown in 7).

  A smoke exhaust duct 29 is disposed on the left of the battery modules 3, 3,... (See FIG. 6). The exhaust duct 29 is connected to exhaust pipes 17, 17,... Disposed on the upper side of the battery modules 3, 3,.

  The gas when an abnormality occurs in the battery cells 16, 16,... Is discharged from the flue pipes 17, 17,... Through the flue duct 29 to the outside of the storage case 2.

  A first reinforcing bar 30 and a second reinforcing bar 31 for reinforcing the storage case 2 are disposed in the storage case 2 (see FIGS. 6 and 11). Each of the first reinforcing bar 30 and the second reinforcing bar 31 is formed of a rigid metal material.

  The first reinforcing bar 30 is formed in a rectangular tube shape extending in the front-rear direction, and its front end is connected to the upper end of the front panel 6 and its rear end is connected to the upper end of the rear panel 7.

  The second reinforcing bar 31 is formed in a rectangular tube shape extending in the left-right direction, and the left and right end portions are respectively coupled to the upper end portions of the side panels 8, 8. The second reinforcing bar 31 is located immediately above or immediately below the first reinforcing bar 30 and is disposed in a state of crossing the first reinforcing bar 30.

  In the storage case 2, four spaces of a first space 32, a second space 33, a third space 34 and a fourth space 35 separated by a first reinforcing bar 30 and a second reinforcing bar 31 are provided. Space is formed. The first space 32 is located on the left front side, the second space 33 is located on the back side of the first space 32, and the third space 34 is located on the front side on the right side of the first space 32, The fourth space 35 is located behind the third space 34.

  In the first space 32, the first battery module 3A is disposed at the lower side, and the first junction box 36 and the second function as control devices for controlling the battery modules 3, 3,. Junction box 37 is disposed. The first junction box 36 and the second junction box 37 are disposed side by side, and are located on the upper side of the first battery module 3A and on the front side of the fourth battery module 3D.

  The first junction box 36 is held by the first bracket 38, and the first bracket 38 holds the first junction box 36. The first junction box 36 is supported by the holding portion 38a and the upper end of the holding portion 38a. And mounting projections 38b, 38b,. In the first bracket 38, the attachment protrusions 38b, 38b,... Are attached to the upper surface of the front panel 6 and the upper surface of the second reinforcing bar 31 by screwing or the like. Thus, the first junction box 36 is attached to the front panel 6 and the second reinforcing bar 31 via the first bracket 38.

  The second junction box 37 is held by a second bracket 39, and the second bracket 39 is a holding portion for holding the second junction box 37 and an object to be projected forward or backward from the upper end portion of the holding portion 39a. And mounting projections 39b, 39b,. In the second bracket 39, the attachment projections 39b, 39b,... Are attached to the upper surface of the front panel 6 and the upper surface of the second reinforcing bar 31 by screwing or the like. Therefore, the second junction box 37 is attached to the front panel 6 and the second reinforcing bar 31 via the second bracket 39.

  Thus, the first junction box 36 and the second junction box 37 that function as control devices are connected to the front panel 6 that functions as part of the storage case 2 via the first bracket 38 and the second bracket 39, respectively. It is attached.

  Therefore, the front panel 6 which functions as a part of the storage case 2 also functions as an attachment member for attaching the first junction box 36 and the second junction box 37, thereby improving the functionality of the storage case 2 and for in-vehicle use. Miniaturization and weight reduction can be achieved by reducing the number of parts of the battery 1.

  In addition, the first junction box 36 and the second junction box 37 functioning as control devices are attached to the second reinforcing bar 31 that reinforces the storage case 2 via the first bracket 38 and the second bracket 39, respectively. It is done.

  Therefore, the second reinforcing bar 31 for reinforcing the storage case 2 also functions as a mounting member for mounting the first junction box 36 and the second junction box 37, and the functionality of the second reinforcing bar 31 is improved. And size reduction and weight reduction by reduction of the number of parts of the battery 1 for vehicle mounting can be achieved.

  Furthermore, the front panel 6 and storage where the first junction box 36 and the second junction box 37 that function as control devices function as part of the storage case 2 via the first bracket 38 and the second bracket 39, respectively. It is attached to a second reinforcing bar 31 that reinforces the case 2.

  Therefore, the front panel 6 functioning as a part of the storage case 2 and the second reinforcing bar 31 for reinforcing the storage case 2 are both used as mounting members for mounting the first junction box 36 and the second junction box 37. Thus, the size and weight can be reduced by improving the functionality of the front panel 6 and the second reinforcing bar 31 and reducing the number of parts of the on-vehicle battery 1.

  In the example described above, the first junction box 36 and the second junction box 37 are attached to the second reinforcing bar 31 via the first bracket 38 and the second bracket 39, respectively. The first reinforcing bar 30 may be configured to function as a mounting member for mounting the first junction box 36 and the second junction box 37.

  The first junction box 36 and the second junction box 37 respectively have control components 40, 40,... For controlling current etc., and as the control components 40, 40,. And connector terminals are provided. The first junction box 36 and the second junction box 37 are connected by a conductive wire (not shown) to a power supply circuit (inverter) (not shown) mounted under the floor of the vehicle.

  As described above, the first junction box 36 and the second junction box 37 are connected to the upper surface of the front panel 6 and the upper surface of the second reinforcing bar 31 via the first bracket 38 and the second bracket 39, respectively. A space 41 is formed under the first junction box 36 and the second junction box 37 inside the storage case 2 (see FIGS. 3 and 7). In the space 41, various electric wires to be described later, the first battery module 3A, and the like are disposed, and each portion where the space 41 is disposed inside the storage case 2 is used as an arrangement space of the wires, for example.

  Since the space 41 is formed under the first junction box 36 and the second junction box 37 as described above, the space 41 is used as an arrangement space for each portion arranged inside the storage case 2. Miniaturization can be achieved by effective use of space.

  Of the battery modules 3, 3,... Are discharged from the first joint ducts 24, 24, 24 and the second joint ducts 28, 28 in the first space 32. The cooled cooling air flows in, and the cooling air cools the first junction box 36 and the second junction box 37.

  As described above, since the first junction box 36 and the second junction box 37 are disposed in the first space 32, the front panel 6 having the hollow portion 11 and the side panel 8 having the hollow portion 11 The first reinforcing bar 30 and the second reinforcing bar 31 are surrounded from the front, rear, left and right.

  Thereby, the front panel 6, the side panel 8, the first reinforcing bar 30, and the second reinforcing bar 31 are positioned on the front, rear, left, and right of the first junction box 36 and the second junction box 37, respectively. 36 and the second junction box 37 are protected by the front panel 6, the side panel 8, the first reinforcing bar 30 and the second reinforcing bar 31 in the front and rear direction and the left and right direction.

  Therefore, the protection state of the first junction box 36 and the second junction box 37 can be improved.

  In addition, since the first reinforcing bar 30 and the second reinforcing bar 31 are formed in a tubular shape having a hollow cross section, high rigidity of the first reinforcing bar 30 and the second reinforcing bar 31 is secured. The protection function for the first junction box 36 and the second junction box 37 can be further improved.

  Furthermore, the first reinforcing bar 30 is disposed extending in the front-rear direction, both ends are connected to the front panel 6 and the rear panel 7, and the second reinforcing bar 31 is disposed extending in the left-right direction. Connected to panels 8 and 8.

  Therefore, the first reinforcement bar 30 and the second reinforcement bar 31 increase the impact resistance in the front-rear direction and the left-right direction of the storage case 2, thereby providing a protective function for the first junction box 36 and the second junction box 37. Further improvement can be achieved.

  Furthermore, the first reinforcing bar 30 and the second reinforcing bar 31 are disposed in a state of being crossed in the vertical direction.

  Accordingly, the first reinforcing bar 30 and the second reinforcing bar 31 are disposed inside the storage case 2 without interfering with each other, and the first junction box 36 and the Thus, the protection function for the second junction box 37 can be improved.

  In addition, a first junction box 36 and a second junction box 37 are disposed at the front end inside the storage case 2.

  Therefore, the first junction box 36 and the second junction box 37 are disposed at a position separated forward from the rear end of the vehicle, and the first junction box 36 and the second junction at the time of a rear collision with the vehicle The protection function for the box 37 can be improved.

  In the second space 33, the second battery module 3B and the third battery module 3C are disposed side by side on the lower side, and the fourth battery module 3D and the fifth battery module 3E are on the upper side They are arranged side by side (see FIGS. 3 and 7).

  The second battery module 3B and the third battery module 3C are attached to the bottom panel 9. The fourth battery module 3D and the fifth battery module 3E have their left ends attached to one side panel 8 and their right ends attached to the upper surface of the first reinforcing bar 30 (FIG. 5, FIG. 6, and FIG. 11).

  Thus, the fourth battery module 3D and the fifth battery module 3E are attached to the first reinforcing bar 30 for reinforcing the storage case 2.

  Therefore, the first reinforcing bar 30 for reinforcing the storage case 2 also functions as an attachment member for attaching the fourth battery module 3D and the fifth battery module 3E, and the functionality of the first reinforcing bar 30 is improved. And size reduction and weight reduction by reduction of the number of parts of the battery 1 for vehicle mounting can be achieved.

  Although the example in which the fourth battery module 3D and the fifth battery module 3E are attached to the first reinforcing bar 30 has been described above, the second reinforcing bar 31 corresponds to the fourth battery module 3D. It may be configured to function as a mounting member for mounting the fifth battery module 3E.

  In addition, at least one of the first battery module 3A, the second battery module 3B, the third battery module 3C, the fourth battery module 3D, and the fifth battery module 3E is the first reinforcing bar 30 or the second reinforcing bar 30 It may be configured to be attached to the reinforcing bar 31.

  A service plug 42 is disposed at a position on the upper end side of the third space 34. The service plug 42 is disposed in the opening 13 e formed in the second closing plate 13 in a state where the opening of the storage portion 4 in the storage case 2 is closed by the lid 5 (see FIGS. 4 and 5). Therefore, in the case of the on-vehicle battery 1, when the opening of the storage unit 4 is closed by the lid 5, the operation (extraction operation and connection operation to the service plug 42 with respect to the service plug 42 via the opening 13e) It is possible to do).

  The service plug 42 has a function of interrupting or connecting a high voltage circuit, for example, in order to prevent an electric shock of a worker or the like at the time of a vehicle inspection and maintenance or a collision with the vehicle. The service plug 42 is pulled out and taken out at the time of inspection and maintenance of the vehicle or a collision with the vehicle, and the high voltage circuit is interrupted by taking out the service plug 42, and an electric shock of a worker or the like is prevented.

  An auxiliary device (not shown) and a control unit 43 are vertically arranged in the fourth space 35 (see FIGS. 5, 6 and 11). The auxiliary device is a device for performing charging when the vehicle is not traveling, such as at night, and the control unit 43 is a unit that controls the entire in-vehicle battery 1.

  The cooling air that has cooled the battery cells 16, 16 ... also flows into the fourth space 35, and the auxiliary air and control unit 43 are cooled by this cooling air.

  Various kinds of electric wires 44, 44,... Are disposed inside the storage case 2. .. Are, for example, connection of the battery module 3 and the control unit 43, connection of the battery modules 3, 3,..., Connection of auxiliary devices and the battery modules 3, 3,. It is used for connection of the first junction box 36 and the second junction box 37 with the service plug 42, connection of the service plug 42 with the auxiliary equipment, and the like.

  The in-vehicle battery 1 configured as described above is disposed and fixed in the luggage compartment 300 in a state where a part thereof is inserted into the recess 107a of the rear floor panel 107 (see FIG. 3). At this time, an impact resistant bar 109 is positioned just above the first junction box 36 and the second junction box 37 and both ends thereof are connected to the wheel aprons 108, 108.

  Therefore, the impact resistance in the left-right direction of the vehicle can be enhanced by the impact resistant bar 109, and the protection function for the first junction box 36 and the second junction box 37 can be improved at the time of a side collision with the vehicle. it can.

  Further, since the impact resistant bar 109 is formed in a rectangular cylindrical shape having a hollow cross section, the rigidity of the impact resistant bar 109 is high, and the protection function for the first junction box 36 and the second junction box 37 is further improved. Can be

  Furthermore, the on-vehicle battery 1 is provided as a part of the lower structure of the vehicle body, and is positioned above the sub-frame 103 that supports the suspensions 104 and 104 and the like.

  Therefore, the impact resistance in the left-right direction of the vehicle is further enhanced by the sub-frame 103, and a further protection function for the first junction box 36 and the second junction box 37 at the time of a side collision with the vehicle. It can improve.

  In the above, the first junction box 36 and the second junction box 37 functioning as control devices are protected by the front panel 6, the side panel 8, the first reinforcing bar 30 and the second reinforcing bar 31. Although an example is shown, the controller to be protected is not limited to the first junction box 36 and the second junction box 37.

  For example, even if the auxiliary device functioning as a control device, the control unit 43, etc. are surrounded and protected by each part of the storage case 2 and the first reinforcing bar 30 and the second reinforcing bar 31. Good.

  Moreover, although the example in which five battery modules 3, 3, ... were arranged was shown above, the number of battery modules 3 arranged inside the storage case 2 is arbitrary, and four or less or Six or more battery modules 3 may be disposed inside the storage case 2.

  DESCRIPTION OF SYMBOLS 100 ... Vehicle body, 103 ... Sub-frame, 104 ... Suspension, 109 ... Shock-resistant bar, 1 ... Vehicle-mounted battery, 2 ... Storage case, 3 ... Battery module, 3A ... 1st battery module, 3B ... 2nd battery module 3C: third battery module, 3D: fourth battery module, 3E: fifth battery module, 6: front panel, 7: rear panel, 8: side panel, 9: bottom panel, 16: battery cell, DESCRIPTION OF SYMBOLS 30 ... 1st reinforcement bar, 31 ... 2nd reinforcement bar, 36 ... 1st junction box, 37 ... 2nd junction box, 38 ... 1st bracket, 39 ... 2nd bracket, 41 ... space

Claims (11)

A storage case having a hollow cross section and formed by combining a plurality of panels;
A battery module in which a plurality of battery cells are disposed inside and stored in the storage case;
A control device which is accommodated in the accommodation case and controls the battery module;
And two reinforcing bars disposed inside the storage case and having both ends coupled to the two panels, respectively.
One reinforcement bar is arranged to extend back and forth,
The other reinforcement bar is arranged to extend left and right,
The control device is disposed at a position surrounded by the two reinforcing bars and the two panels from the front, rear, left and right,
An on- vehicle battery in which the two reinforcing bars are vertically crossed . The on-vehicle battery according to claim 1, wherein the reinforcing bar is formed in a tubular shape having a hollow cross section. The on-vehicle battery according to claim 1, wherein the control device is disposed at a front end portion inside the storage case. A storage case having a hollow cross section and formed by combining a plurality of panels;
A battery module in which a plurality of battery cells are disposed inside and stored in the storage case;
A control device which is accommodated in the accommodation case and controls the battery module;
And at least one reinforcing bar disposed inside the storage case and having both ends coupled to the two panels, respectively.
The control device is disposed at a position surrounded by the at least one panel and the at least one reinforcing bar from the front, rear, left, and right .
An on- vehicle battery in which an impact resistant bar extending right and left and coupled to a vehicle body is positioned directly above the control device . The on-vehicle battery according to claim 4, wherein the impact resistant bar is formed in a tubular shape having a hollow cross section. A bracket for holding the control device is provided;
The on-vehicle battery according to any one of claims 1 to 5, wherein the control device is attached to the panel via the bracket. A bracket for holding the control device is provided;
The on-vehicle battery according to any one of claims 1 to 5, wherein the control device is attached to the reinforcing bar via the bracket. A bracket for holding the control device is provided;
The on-vehicle battery according to any one of claims 1 to 5, wherein the control device is attached to the panel and the reinforcing bar via the bracket. The vehicle battery according to any one of claims 6 to 8, wherein a space is formed below the control device inside the storage case. The vehicle battery according to any one of claims 1 to 9, wherein at least a part of the battery module is attached to the reinforcing bar. A storage case having a hollow cross section and formed by combining a plurality of panels;
A battery module in which a plurality of battery cells are disposed inside and stored in the storage case;
A control device which is accommodated in the accommodation case and controls the battery module;
And at least one reinforcing bar disposed inside the storage case and having both ends coupled to the two panels, respectively.
The control device is disposed at a position surrounded by the at least one panel and the at least one reinforcing bar from the front, rear, left, and right .
An on- vehicle battery , wherein the control device is provided as a part of a lower structure of a vehicle body and located above a sub-frame which supports at least a suspension .

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