JP2016181481A - On-vehicle battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the protection state of a service plug.SOLUTION: An on-vehicle battery includes: a storage case 2 having a hollow cross section and formed by combining multiple panels 6, 7, 8; a battery module 3 where multiple battery cells 16 are arranged inside and that is stored in the storage case; a service plug 41 stored in the storage case and blocking or connecting a high-voltage circuit; and at least one of reinforcement bars 30, 31 that are arranged inside the storage case and where both of end parts are respectively joined with the two panels. The service plug is arranged at a position to be surrounded from all the directions by at least one of the panels and at least one of the reinforcement bars. Thus, the panels and the reinforcement bars are positioned in front and rear and right and left of the service plug. The service plug is protected in a front and rear direction and in a right and left direction by the panels and the reinforcement bars, so as to improve the protection state of the service plug.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a technical field relating to an in-vehicle battery mounted on a vehicle such as an automobile.

JP 2006-335243 A

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

  In recent years, vehicles such as EVs (Electric Vehicles), HEVs (Hybrid Electric Vehicles), and PHEVs (Plug-in Hybrid Electric Vehicles) are becoming popular. In a vehicle powered by electricity, an in-vehicle battery having a high power storage function is mounted.

  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 metal hydride battery and a lithium ion battery, for example. Has been. Further, in a vehicle-mounted 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 the battery cells of these plurality of battery modules are connected in series or Connected in parallel.

  Such an in-vehicle battery is provided with a service plug that cuts off or connects a high-voltage circuit in order to prevent an electric shock of an operator at the time of vehicle inspection and maintenance or a collision with the vehicle, for example. (For example, refer to Patent Document 1).

  The service plug 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 cut off when the service plug is taken out to prevent an electric shock of an operator or the like. Therefore, in the case of an in-vehicle battery provided with a service plug, the service plug can be pulled out and taken out in the event of a vehicle collision, so that the service plug is not damaged or damaged. There is a need to.

  Therefore, in order to protect the service plugs arranged inside the storage case, the in-vehicle battery has a support frame extending left and right on the outer surface side of the storage case, and the left and right ends of the support frame are part of the vehicle body. There exists what couple | bonded with the provided pair of side frame (for example, refer patent document 1).

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

  However, in the in-vehicle battery described in Patent Document 1, since the left and right ends of the support frame are coupled to the pair of side frames, the strength in the left-right direction increases, but the strength in the front-rear direction is insufficient. For example, there is a possibility that the service plug disposed inside the storage case cannot be sufficiently protected in the event of a collision from behind with respect to the vehicle.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to overcome the above-described problems and improve the protection state of service plugs.

  First, an in-vehicle battery according to the present invention includes a storage case having a hollow cross section and formed by joining a plurality of panels, and a battery module in which a plurality of battery cells are arranged and stored in the storage case. And a service plug housed in the housing case for blocking or connecting a high voltage circuit, and at least one reinforcing bar disposed inside the housing case and having both ends coupled to the two panels, The service plug is disposed at a position surrounded by at least one panel and at least one reinforcing bar from the front, rear, left and right.

  Thereby, the panel and the reinforcing bar are positioned on the front, rear, left and right of the service plug, and the service plug is protected in the front-rear direction and the left-right direction by the panel and the reinforcing bar.

  2ndly, in the vehicle-mounted battery which concerns on above-mentioned this invention, it is desirable for the said reinforcement bar to be formed in the cylinder shape which has a hollow cross section.

  Thereby, the rigidity of a reinforcement bar becomes high.

  3rdly, in the vehicle-mounted battery which concerns on above-mentioned this invention, two said reinforcement bars are provided, one reinforcement bar is arrange | positioned in the state extended in the front-back direction, and the other reinforcement bar is arrange | positioned in the state extended in the left-right direction. Preferably, the service plug is surrounded by the two reinforcing bars and the two panels.

  Thereby, the impact resistance in the front-back direction and the left-right direction of a storage case becomes high with two reinforcement bars.

  4thly, in the vehicle-mounted battery which concerns on above-mentioned this invention, it is desirable to arrange | position in the state which the said 2 reinforcement bars cross | intersected in the up-down direction.

  Thereby, two reinforcement bars are arrange | positioned inside a storage case, without interfering with each other.

  Fifth, in the above-described vehicle-mounted battery according to the present invention, it is desirable that the service plug is disposed at a front end portion inside the storage case.

  As a result, the service plug is disposed at a position spaced forward from the rear end of the vehicle.

  6thly, in the vehicle-mounted battery which concerns on this invention mentioned above, it is desirable that the impact-resistant bar extended in the left-right direction and the both ends was couple | bonded with the vehicle body is located just above the said service plug.

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

  7thly, in the vehicle-mounted battery which concerns on this invention mentioned above, it is desirable for the said impact-resistant bar | burr to be formed in the cylinder shape which has a hollow cross section.

  Thereby, the rigidity of an impact-resistant bar becomes high.

  Eighthly, in the above-described vehicle-mounted battery according to the present invention, it is desirable that the service plug is located in a cargo compartment front end space surrounded by a backrest of the rear seat and a rear floor panel.

  As a result, the service plug can be removed from the rear seat side by tilting the backrest forward while the service plug is positioned close to the backrest and the side door of the vehicle is opened.

  Ninthly, in the above-described vehicle-mounted battery according to the present invention, it is preferable that at least a part of the battery module is attached to the reinforcing bar.

  Thereby, the reinforcement bar which reinforces a storage case functions also as an attachment member for attaching a battery module.

  10thly, in the above-mentioned vehicle-mounted battery according to the present invention, it is desirable that the service plug is located at least above a subframe that is provided as a part of the lower structure of the vehicle body and supports at least the suspension.

  Thereby, the impact resistance in the left-right direction of a vehicle becomes high with a sub-frame.

  According to the present invention, the panel and the reinforcement bar are positioned on the front, rear, left and right sides of the service plug, and the service plug is protected in the front-rear direction and the left-right direction by the panel and the reinforcement bar, so that the protection state of the service plug can be improved. it can.

2 to 12 show an embodiment of an in-vehicle battery according to the present invention, and this figure is a plan view showing a positional relationship between a 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. It is a side view which shows a part of vehicle-mounted battery with a cross section in a cross section. 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 shows a cover part separately. It is a perspective view of the vehicle-mounted battery which shows a cover part separately in a state seen from a direction different from FIG. It is a schematic side view which shows the arrangement | positioning state of the 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. It is a schematic exploded perspective view of a battery module or the like. It is a schematic plan view of the vehicle-mounted battery shown with the lid part removed. It is a schematic perspective view which shows the example in which the service plug was enclosed by a part of cover part.

  First, a schematic configuration of a vehicle (vehicle body) on which a vehicle-mounted 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 rear side members 101, 101 that are spaced apart from each other, the cross member 102 that is positioned between the rear side members 101, 101, and the cross member 102. Subframe 103.

  The rear side members 101, 101 are arranged extending in the front-rear direction. The cross member 102 extends to the left and right, and both left and right ends are fixed to the rear side members 101 and 101, respectively. The subframe 103 extends to the left and right, and both left and right ends are fixed to the rear side members 101 and 101, respectively.

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

  A hub unit 105 is coupled to the arm 104b, and wheels 106 are attached to the hub unit 105.

  A rear floor panel 107 is disposed above the cross member 102 and the subframe 103, and wheel aprons 108, 108 are provided respectively on the left and right sides of the rear floor panel 107 (see FIG. 2). The rear floor panel 107 is formed with a recess 107a opened upward (see FIG. 3). The wheel aprons 108 and 108 are positioned so as to cover a part of the wheels 106 and 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 made of a highly rigid metal material. The left and right ends of the shock-resistant bar 109 are fixed to the wheel aprons 108 and 108. The impact-resistant bar 109 has a hollow cross section formed at least at a portion excluding both ends in a rectangular tube shape (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 so as 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 on the upper side of the rear floor panel 107 is formed as a luggage compartment 300 (see FIG. 3). The luggage compartment 300 is provided with a recess 107 a formed in the rear floor panel 107.

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

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

  The in-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 portion 5 that closes the opening of the storage portion 4.

  The storage unit 4 includes a front panel 6 facing in the front-rear direction, a rear panel 7 positioned on the rear side of the front panel 6, a side panel 8, 8 positioned on the left and right sides, and a bottom panel 9 facing in the up-down direction. And have. The front panel 6, the rear panel 7, the side panels 8, 8 and the bottom panel 9 are all formed by extrusion molding such as aluminum.

  The front panel 6, the rear panel 7, the side panels 8, 8 and the bottom panel 9 all have a hollow cross-sectional shape (see FIG. 8). The front panel 6, the rear panel 7, the side panels 8, 8, and the bottom panel 9 include, for example, a flat plate portion 10 that faces in the front-rear direction, the left-right direction, or the vertical direction, and a hollow portion 11 that is formed in a rectangular tube shape. Yes. The hollow portion 11 is formed in a hollow cross-sectional shape, and the hollow portion 11 is 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 in a shape in which, for example, a plurality of hollow portions 11, 11,. (See FIG. 9).

  As described above, the front panel 6, the rear panel 7, the side panels 8, 8, and the bottom panel 9 all have the hollow portion 11 and at least a part of the cross-sectional shape is a rectangular tube shape. It is secured. Therefore, the storage section 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 that secures high rigidity has a high overall strength.

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

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

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

  An opening 13 e penetrating vertically is formed at a position near the right end of the second closing plate 13.

  The upper vertical portion 13a and the horizontal portion 13b of the second closing plate 13 form an arrangement space 14 that is opened forward, upward, leftward, and rightward in the luggage compartment 300 (see FIGS. 3 and 7). ). In the arrangement space 14, portions other than the left and right end portions of the shock-resistant bar 109 are arranged.

  For example, five of the battery modules 3, 3,... As the battery modules 3, 3,..., The first battery module 3A located at the foremost side, the second battery module 3B located at the rear side of the first battery module 3A, and the second battery module. A fourth battery module 3D and a fourth battery module 3D located on the rear side of the third battery module 3C and the second battery module 3B located on the rear side of the first battery module 3A. A fifth battery module 3E is provided which is located on the rear side of the battery module 3D and located directly above the third battery module 3C.

  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 electric wires to be described later.

  The battery module 3 includes a case body 15 and a plurality of battery cells 16, 16,... Accommodated 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 15 a penetrating front and rear is formed in the front surface portion, and an intake hole 15 b penetrating front and rear is formed in the rear surface portion.

  The battery cells 16, 16,... Are held inside the case body 15 in a state in which the thickness direction is the left-right direction and are arranged at equal intervals on the left and right, for example. In a state where the battery cells 16, 16,... Are held by the case body 15, certain gaps are formed between the battery cells 16, 16,. The battery cells 16, 16,... Are connected in series.

  A smoke exhaust pipe 17 is attached to the case body 15 so as to extend left and right. The smoke exhaust pipe 17 includes 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 part 17b is located in the center part in the front-back direction of the base plate part 17a. The smoke exhaust pipe 17 is attached to the case body 15 in a state where the base plate portion 17 a closes the opening on the upper side of the case body 15.

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

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

  Each of the battery cells 16, 16,... Is provided with a valve (not shown) that can communicate with the inside, and each valve communicates with a gas flow hole of the smoke exhaust pipe 17. If an abnormality occurs in the battery cell 16, gas may be generated inside. However, when the gas is generated, the internal pressure of the battery cell 16 is increased and the valve is opened, and the generated gas is discharged from the valve to the gas flow hole. To the smoke exhaust pipe 17.

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

  When the battery modules 3, 3, ... are driven, cooling air is taken into the battery modules 3, 3, ... by the first intake unit 19 and the second intake unit 20, respectively (Figs. 6 and 6). 7).

  The first intake unit 19 includes 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 cooling air into the first battery module 3A, the second battery module 3B, and the third battery module 3C. The first intake duct 21 has a lower end portion branched into three in the left-right direction, and the branched portions are arranged in the storage case 2, respectively, and the first joint ducts 24, 24, 24 and the case body 15, The first battery module 3A, the second battery module 3B, and the third battery module 3C are communicated with each other through intake holes 15b, 15b, and 15b formed in the rear surface portions 15 and 15, respectively.

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

  The lower end 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 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 and 28.

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

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

  The lower end of the second intake pipe 27 is connected to the second intake fan 26. Accordingly, 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 outside the storage case 2 from the first intake pipe 23 and the second intake pipe 27 becomes the cooling air, respectively. The air is taken into the first intake duct 21 and the second intake duct 25.

  The cooling air taken into the first intake duct 21 is caused to flow through the first joint ducts 24, 24, 24, and the first batteries are respectively received from the intake holes 15b, 15b, 15b of the case bodies 15, 15, 15. It is discharged into 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 a gap formed between the battery cells 16, 16,. The battery cells 16, 16, ... are cooled by the cooling air. The cooling air directed forward through the gap formed between the battery cells 16, 16,... Is discharged from the discharge holes 15a, 15a, 15a of the case bodies 15, 15, 15 to the internal space of the storage case 2, respectively. Is done.

  On the other hand, the cooling air taken into the second intake duct 25 is caused to flow through the second joint ducts 28 and 28, and the fourth battery module 3 </ b> D and the second battery module 3 </ b> D from the intake holes 15 b and 15 b of the case bodies 15 and 15, respectively. 5 is discharged into the battery module 3E.

  The cooling air discharged into the fourth battery module 3D and the fifth battery module 3E travels forward through the gap formed between the battery cells 16, 16,... , 16,... Are cooled. The cooling air directed forward through the gap formed between the battery cells 16, 16,... Is discharged from the discharge holes 15a, 15a of the case bodies 15, 15 to the internal space of the storage case 2, respectively (see FIG. 7).

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

  The gas when an abnormality occurs in the battery cells 16, 16,... Is discharged from the exhaust pipes 17, 17,.

  A first reinforcing bar 30 and a second reinforcing bar 31 that reinforce the storage case 2 are disposed inside the storage case 2 (see FIGS. 6 and 11). Both the first reinforcing bar 30 and the second reinforcing bar 31 are made of a highly rigid metal material.

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

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

  Inside the storage case 2, there are four spaces, a first space 32, a second space 33, a third space 34, and a fourth space 35, which are separated by a first reinforcing bar 30 and a second reinforcing bar 31. A space is formed. The first space 32 is located on the left front side, the second space 33 is located on the rear side of the first space 32, the third space 34 is located on the right side of the first space 32 on the front side, The fourth space 35 is located on the rear side of the third space 34.

  In the first space 32, the first battery module 3A is disposed on the lower side, and the first junction box 36 and the second functioning as control devices for controlling the battery modules 3, 3,. The junction box 37 is arranged. The first junction box 36 and the second junction box 37 are arranged side by side and are positioned 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 a first bracket 38. The first bracket 38 is a holding portion 38a that holds the first junction box 36 and a cover that protrudes forward or backward from the upper end of the holding portion 38a. It has attachment protrusions 38b, 38b,. The first bracket 38 has attachment protrusions 38b, 38b,... Attached to the upper surface of the front panel 6 and the upper surface of the second reinforcing bar 31 by screws or the like. Accordingly, 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. The second bracket 39 is a holding portion 39a that holds the second junction box 37 and a cover that protrudes forward or backward from the upper end of the holding portion 39a. There are mounting projections 39b, 39b,. As for the 2nd bracket 39, to-be-attached protrusion 39b, 39b, ... is attached to the upper surface of the front panel 6 and the upper surface of the 2nd reinforcement bar 31 by screwing etc. As shown in FIG. Therefore, the second junction box 37 is attached to the front panel 6 and the second reinforcing bar 31 via the second bracket 39.

  In the above example, 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 an attachment member for attaching the first junction box 36 and the second junction box 37.

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

  In the first space 32, the battery cells 16, 16,... Of the battery modules 3, 3,... The cooled cooling air is introduced, and the first junction box 36 and the second junction box 37 are cooled by the cooling air.

  In the second space 33, the second battery module 3B and the third battery module 3C are arranged side by side on the lower side, and the fourth battery module 3D and the fifth battery module 3E on the upper side are arranged front and rear. They are arranged side by side.

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

  In this way, the fourth battery module 3D and the fifth battery module 3E are attached to the first reinforcing bar 30 that reinforces the storage case 2.

  Accordingly, the first reinforcing bar 30 that reinforces 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. In addition, the vehicle battery 1 can be reduced in size and weight by reducing the number of parts.

  In the above, the example in which the fourth battery module 3D and the fifth battery module 3E are attached to the first reinforcing bar 30 is shown. However, the second reinforcing bar 31 is connected to the fourth battery module 3D. You may be set as the structure which functions as an attachment member for attaching the 5th 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 battery module 3E. The configuration may be such that the reinforcing bar 31 is attached.

  A service plug 41 is disposed at a position on the upper end side in the third space 34. The service plug 41 is disposed in the opening 13e formed in the second closing plate 13 in a state where the opening of the storage 4 in the storage case 2 is closed by the lid 5 (see FIGS. 4 and 5). Therefore, in the in-vehicle battery 1, when the opening of the storage portion 4 is closed by the lid portion 5, the service plug 41 is operated with respect to the service plug 41 via the opening 13e (withdrawal operation and connection operation). ) Is made possible to do.

  The service plug 41 has a function of cutting off or connecting a high voltage circuit in order to prevent an electric shock of a worker or the like at the time of vehicle inspection and maintenance or a collision with the vehicle, for example. The service plug 41 is pulled out and taken out at the time of vehicle inspection and maintenance or a collision with the vehicle, and the service plug 41 is taken out, whereby the high voltage circuit is cut off and an electric shock of an operator or the like is prevented.

  As described above, since the service plug 41 is disposed in the third space 34, the front panel 6 having the hollow portion 11, the side panel 8 having the hollow portion 11, the first reinforcing bar 30, and the second reinforcing member. It is surrounded from the front, rear, left and right by a bar 31.

  Accordingly, 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 service plug 41, and the service plug 41 is connected to the front panel 6, the side panel 8, and the first reinforcing bar. Since the bar 30 and the second reinforcing bar 31 protect each other in the front-rear direction and the left-right direction, the protection state of the service plug 41 can be improved.

  Moreover, since the 1st reinforcement bar 30 and the 2nd reinforcement bar 31 are formed in the cylinder shape which has a hollow cross section, the high rigidity of the 1st reinforcement bar 30 and the 2nd reinforcement bar 31 is ensured, and a service is carried out. The protection function for the plug 41 can be further improved.

  Furthermore, the first reinforcing bar 30 is arranged in a state of extending in the front-rear direction, both ends thereof are connected to the front panel 6 and the rear panel 7, and the second reinforcing bar 31 is arranged in a state of extending in the left-right direction so that both ends are side surfaces. It is connected to the panels 8 and 8.

  Therefore, the first reinforcing bar 30 and the second reinforcing bar 31 increase the shock resistance of the storage case 2 in the front-rear direction and the left-right direction, and the protection function for the service plug 41 can be further improved.

  Furthermore, the 1st reinforcement bar 30 and the 2nd reinforcement bar 31 are arrange | positioned in the state which cross | intersected in the up-down direction.

  Accordingly, the first reinforcing bar 30 and the second reinforcing bar 31 are arranged inside the storage case 2 without interfering with each other, and the protection function for the service plug 41 is improved after the internal space of the storage case 2 is effectively used. Can be achieved.

  In addition, a service plug 41 is disposed at the front end portion inside the storage case 2.

  Therefore, the service plug 41 is disposed at a position spaced forward from the rear end portion of the vehicle, and the protection function for the service plug 41 in the event of a collision with the vehicle from the rear can be improved.

  The in-vehicle battery 1 is disposed on the rear side of the rear seat 200, and the service plug 41 is positioned in the cargo compartment front end side space 300a surrounded by the backrest 202 and the floor panel 107 (see FIG. 3).

  Since the service plug 41 is positioned in the cargo space front end side space 300a in this manner, the service plug 41 is positioned close to the backrest 202, so that the protection function of the service plug 41 in the event of a collision with the vehicle from the rear is provided. Improvements can be made.

  In addition, the side door of the vehicle can be opened even when the vehicle collides from the rear. At this time, as shown in FIG. 4, the service plug 41 is removed from the rear seat 200 side by tilting the backrest 202 forward. It becomes possible.

  Therefore, the service plug 41 can be easily taken out in the event of a collision from the rear against the vehicle, and the danger can be avoided by shutting off the high voltage circuit.

  In the fourth space 35, auxiliary equipment (not shown) and the control unit 42 are arranged side by side (see FIGS. 5, 6 and 11). The auxiliary device is a device for charging the vehicle when the vehicle is not traveling at night or the like, and the control unit 42 is a unit that controls the entire vehicle battery 1.

  The cooling air that has cooled the battery cells 16, 16,... Flows into the fourth space 35, and the auxiliary equipment and the control unit 42 are cooled by the cooling air.

  Various electric wires 43, 43,... Are arranged inside the storage case 2. The electric wires 43, 43,... Are, for example, a connection between the battery module 3 and the control unit 42, a connection between the battery modules 3, 3,..., A connection between an auxiliary device and the battery modules 3, 3,. The first and second junction boxes 36 and 37 are used to connect the service plug 41 and the service plug 41 to auxiliary equipment.

  The in-vehicle battery 1 configured as described above is arranged 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, the shock-resistant bar 109 having both ends coupled to the wheel aprons 108 and 108 is positioned directly above the service plug 41.

  Therefore, the impact resistance bar 109 increases the impact resistance in the left-right direction of the vehicle, and the protection function for the service plug 41 in the event of a side collision with the vehicle can be improved.

  In addition, since the impact-resistant bar 109 is formed in a rectangular tube shape having a hollow cross section, the impact-resistant bar 109 has high rigidity, and the protection function for the service plug 41 can be further improved.

  Further, the vehicle-mounted battery 1 is provided as a part of the lower structure of the vehicle body and is positioned above the subframe 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 subframe 103, and the protection function for the service plug 41 at the time of a side collision with the vehicle can be further improved.

  In the above description, the service plug 41 is surrounded and protected by the front panel 6, the side panel 8, the first reinforcing bar 30, and the second reinforcing bar 31 from the front, rear, left, and right. In addition or alternatively, the lid 5 may be surrounded and protected from the front, rear, left and right by a part of the lid 5 (see FIG. 12).

  In this case, the lid 5 is constituted by, for example, a first portion 44 and a second portion 45 obtained by dividing the first closing plate 12 in the left-right direction, and an opening 45 a is formed in the second portion 45. ing. The second portion 45 includes a closing portion 46 that closes a part of the opening of the storage portion 4 and a standing wall portion 47 that protrudes upward from the opening edge of the opening portion 45a.

  The length of the second closing plate 13 in the left-right direction is substantially the same as the lateral width of the first portion 44.

  The entire portion on the right side of the opening of the storage portion 4 is closed by the closing portion 46 of the second portion 45, the service plug 41 is disposed in the opening 45a, and the service plug 41 is surrounded by the standing wall portion 47 from the front, rear, left and right. It is in a state.

  Thus, the service plug 41 is surrounded from the front, rear, left and right by the standing wall 47 of the lid 5, and the standing wall 47 is positioned on the front, rear, left and right of the service plug 41, and the service plug 41 is protected by the standing wall 47 in the front-rear direction and the left-right direction. Therefore, the protection state of the service plug 41 can be improved.

  In addition, although the example in which the five battery modules 3, 3,... Are arranged is shown above, the number of the battery modules 3 arranged in the storage case 2 is arbitrary. Six or more battery modules 3 may be arranged inside the storage case 2.

  DESCRIPTION OF SYMBOLS 100 ... Vehicle body, 103 ... Sub-frame, 104 ... Suspension, 109 ... Impact-resistant bar, 200 ... Rear seat, 202 ... Backrest, 300a ... Space in front side of cargo compartment, 1 ... In-vehicle battery, 2 ... Storage case, 3 ... Battery module, 3A ... 1st battery module, 3B ... 2nd battery module, 3C ... 3rd battery module, 3D ... 4th battery module, 3E ... 5th battery module, 6 ... Front panel, 7 ... Rear panel, 8 ... side panel, 9 ... bottom panel, 16 ... battery cell, 30 ... first reinforcing bar, 31 ... second reinforcing bar, 41 ... service plug

Claims (10)

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 arranged and stored in the storage case;
A service plug housed in the housing case for blocking or connecting a high voltage circuit;
And at least one reinforcing bar disposed inside the storage case and having both ends coupled to the two panels, respectively.
The in-vehicle battery, wherein the service plug 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. The in-vehicle battery according to claim 1, wherein the reinforcing bar is formed in a cylindrical shape having a hollow cross section. Two reinforcing bars are provided,
One reinforcing bar is arranged in a state of extending in the front and rear,
The other reinforcing bar is arranged in a state extending left and right,
The in-vehicle battery according to claim 1, wherein the service plug is surrounded by the two reinforcing bars and the two panels. The in-vehicle battery according to claim 3, wherein the two reinforcing bars are arranged in a state of intersecting in the vertical direction. The in-vehicle battery according to any one of claims 1 to 4, wherein the service plug is disposed at a front end portion inside the storage case. The in-vehicle battery according to any one of claims 1 to 5, wherein an impact-resistant bar extending left and right and having both ends coupled to the vehicle body is positioned directly above the service plug. The in-vehicle battery according to claim 6, wherein the impact-resistant bar is formed in a cylindrical shape having a hollow cross section. The in-vehicle battery according to any one of claims 1 to 7, wherein the service plug is located in a space at a front end side of a luggage compartment surrounded by a backrest and a rear floor panel of a rear seat. The in-vehicle battery according to any one of claims 1 to 8, wherein at least a part of the battery module is attached to the reinforcing bar. The in-vehicle battery according to any one of claims 1 to 9, wherein the service plug is provided as a part of a lower structure of a vehicle body and is positioned above a subframe that supports at least a suspension.

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