JP3997561B2 - Battery mounting device used for vehicle driving and the like - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric vehicle, and more particularly to a battery mounting structure used for driving a vehicle.
[0002]
[Prior art and problems to be solved by the invention]
An electric vehicle is equipped with a large-scale battery for supplying electric power for vehicle propulsion to a drive motor, and such a battery is generally stored in a battery case and mounted under the floor of the vehicle. It is.
[0003]
At this time, the battery case needs to be provided with a waterproof structure for preventing battery failure due to water intrusion. In addition, various reinforcing members must be attached in order to minimize damage to the battery at the time of a vehicle collision.
[0004]
However, when a battery case is placed under the floor, a battery is placed inside the vehicle to effectively prevent water from entering even in adverse environments such as water splashing from the road surface or landing of the vehicle. It is necessary to apply an advanced waterproof structure. Further, since the battery case is exposed to the outside, it is necessary to use various rigid members having high rigidity. Further, when the vehicle is traveling, particularly when traveling on a rough road, the battery case may be damaged due to interference between the battery case and the road surface. Therefore, the battery case itself needs to have high rigidity.
[0005]
Under these circumstances, when the battery case is arranged under the floor, there is a problem that the battery case, the reinforcing structure, etc. are enlarged, and the manufacturing cost of the electric vehicle is increased.
[0006]
The battery case may store not only the battery but also various sensors and an electronic control device that controls charging / discharging of the battery based on those sensors. In this case, if the battery case is arranged under the floor, it is necessary to lift the vehicle, and there is a problem that maintenance cannot be easily performed.
[0007]
The present invention was made as viewed Kan the above-mentioned problem, that the aim is excellent in fracture prevention and waterproofing of the battery, the maintenance of the battery equipment to provide a mounting device of a battery used in vehicles that are easy to drive, etc. It is in.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a case rear that is disposed at the rear of a cabin and has an opening that opens toward the cabin, in which a battery is stored, and the opening. A battery case including a case front that removably closes, the opening of the case rear is opened only toward the backrest portion of the rear seat, and the case front is behind the rear seat and the backrest of the rear seat Exposure to the cabin is prevented by the portion, and the backrest portion of the rear seat is tilted forward, or the rear seat is disposed at a position where it can be exposed to the cabin with the rear seat removed.
[0009]
Since the electric vehicle according to the present invention is provided with the battery case behind the cabin, the impact applied to the battery case is relatively small even during various vehicle collisions such as forward collision, rear collision, and offset collision. It can be suppressed to things. Further, since the battery case is not exposed to the outside of the vehicle, the battery case is less likely to be flooded, and interference between the battery case and the road surface can be avoided. As a result, the battery case reinforcement structure and waterproof structure can be simplified, the battery case can be miniaturized, and the manufacturing cost of the electric vehicle can be reduced compared to the case where other conventional battery mounting structures are adopted. It can be.
[0010]
In the battery case, the opening portion of the case rear in which the battery is accommodated is provided only toward the cabin of the electric vehicle, particularly the backrest portion of the rear seat, and is detachably closed by the case front. For this reason, it is possible to easily perform maintenance of various devices such as a battery housed in the battery case by removing the case front from the cabin side without performing complicated work such as lifting the vehicle.
[0011]
In a preferred aspect of the present invention, the case front is formed of a highly rigid material such as an iron plate. By doing so, the deformation of the case front can be suppressed to a small one even in the event of a vehicle collision or the like, so that the torsion of the entire battery case can be suppressed. Furthermore, if the case front is made of a material having plasticity such as an iron plate among the highly rigid materials, the case front can be plastically deformed to absorb the collision energy at the time of a vehicle collision. As a result, according to the present invention, it is possible to minimize damage to various devices such as a battery housed inside.
[0012]
In the present invention, the battery case is provided at the rear of the cabin of the electric vehicle. However, a case front made of a highly rigid material is disposed between the case rear housing the battery and the cabin. For this reason, it is possible to prevent the battery from jumping directly into the cabin due to inertial force at the time of forward collision or offset collision.
[0013]
Note that at least a part of the upper part of the case front made of a highly rigid material may be detachably attached to the upper rear part of the cabin, and at least a part of the lower part of the case front may be detachably attached to the floor. If it carries out like this, a case front can be functioned as a reinforcement member, and the rigidity of a vehicle can be improved.
[0014]
In another desirable aspect of the present invention, the case front includes an electromagnetic wave shielding material. That is, the battery case houses not only the battery but also various sensors and control devices, and electromagnetic noise is generated from these various devices. Therefore, by forming the case front including a material that shields electromagnetic waves, the electromagnetic noise can be prevented from entering the cabin.
[0015]
In still another desirable aspect of the present invention, at least a part of the case rear is formed of a resin material. In this way, even if a liquid leakage occurs in the battery stored in the battery case, it is possible to prevent the battery case from leaking out. Even when an external force is applied to the case rear due to a vehicle collision, the case rear is not appropriately deformed and damaged. Therefore, even when a vehicle collision occurs, it is possible to prevent the liquid leaking from the battery from leaching out of the battery case.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0017]
FIG. 1 is a perspective view showing a battery case of the electric vehicle according to the present embodiment. As shown in the figure, the battery case 10 includes a box-shaped case rear 16 having an opening 12 and a storage portion 14, and a flat case front 18.
[0018]
The case rear 16 is integrally formed of a resin material such as ABS, and an attachment portion 20 extending outward is formed on the periphery of the opening 12. A plurality of bolt holes are formed in the mounting portion 20 for bolting with the case front 18, and nuts are fixed to the back surface. Further, a bolt hole for fixing the batteries 22a and 22b indicated by imaginary lines to the vehicle side is formed in the bottom portion (located on the vehicle lower side) of the housing portion 14 of the case rear 16. If the case rear 16 that houses the batteries 22a and 22b is formed of a resin material in this way, even if liquid leakage occurs from the batteries 22a and 22b, the battery liquid and the like can be prevented from leaking outside. it can. Further, the case rear 16 is not appropriately deformed and broken during a vehicle collision. Therefore, it is possible to prevent the battery liquid or the like from leaking to the outside even when the batteries 22a and 22b are damaged at the time of a vehicle collision.
[0019]
On the other hand, the case front 18 is formed of an iron plate, and is formed so as to protrude from the upper side of the vehicle so as to be attached to the upper rear portion of the cabin of the electric vehicle, and a bolt hole is formed in the central portion. A provided mounting portion 24 is provided. Similarly, below the peripheral edge of the case front 18 is an attachment portion 26 that is bent in a direction opposite to the case rear 16 and has a bolt hole for attachment to the cabin floor of the electric vehicle. Is provided. Further, the case front 18 is formed with a bolt hole at a position corresponding to the bolt hole provided in the mounting portion 20 of the case rear 16. Further, a bolt hole for fixing the battery 22a, 22b housed in the case rear 16 is formed in the upper center of the case front 18.
[0020]
Two batteries 22a and 22b are juxtaposed inside the battery case 10 including the case rear 16 and the case front 18 as indicated by an imaginary line in FIG. In the spaces beside the batteries 22a and 22b, various sensors and various control devices for measuring currents and voltages of the batteries 22a and 22b (not shown) are stored.
[0021]
FIG. 2 is a cross-sectional view showing a state of attachment of the battery case 10 in the electric vehicle according to the present embodiment. As shown in the figure, the case front 18 of the battery case 10 is located behind a rear seat 30 provided at the rear portion of the cabin 28 of the electric vehicle. The mounting portion 24 provided above the peripheral edge of the case front 18 is detachably attached to the upper back 32 of the monocoque body located above the rear portion of the vehicle and a bolt. The upper back 32 has an upper back reinforcing member 34 attached to the back surface thereof, so that the vehicle rigidity of the electric vehicle is improved. The attachment portion 26 provided below the peripheral edge of the case front 18 is detachably attached to the cabin floor 36 by bolts. By attaching the case front 18 formed of the iron plate to the upper back 32 and the floor 36 in this manner, the case front 18 can function as a vehicle reinforcing member, and the rigidity of the vehicle structure can be improved.
[0022]
On the other hand, a battery stay 40 is formed on the floor 36 that is closer to the luggage 38 than the case front 18, and a battery stay 40 that is formed so that the central portion rises upward is fixed with bolts at the end thereof. Then, the case rear 16 is placed on the battery stay 40 and is arranged so that the bolt holes drilled in the mounting portion 20 coincide with the corresponding bolt holes of the case front 18, and they are bolt-fixed. Has been attached. Further, a battery 22b is disposed therein, and mounting legs 42 and 44 formed below the side surface of the battery are bolted to the battery stay 40 via bolt holes at the bottom of the case rear 16. Further, a support portion 46 provided on the upper portion of the battery 22b is bolted to a bolt hole above the central portion of the case front 18. In addition, although the attachment state of the battery 22b was demonstrated here, it attaches to the battery case 10 and the floor 36 similarly about the battery 22a arrange | positioned on the vehicle opposite side.
[0023]
In the electric vehicle described above, since the case front 18 of the battery case 10 is disposed behind the rear seat 30 of the cabin 28 and is detachably attached, maintenance of various devices housed in the battery case 10 is maintained. Can be easily performed from the inside of the cabin 28. That is, the case can be obtained by tilting the backrest portion of the rear seat forward or by removing the rear seat 30 because the rear seat of the vehicle is generally designed to be removed relatively easily. The front 18 can be exposed to the cabin 28. In this way, the case front 18 can be removed from the case rear 16 by further removing predetermined bolts, and maintenance of the internal devices of the battery case 10 can be performed. By adopting such a battery storage structure, the present electric vehicle can easily perform maintenance of the equipment in the battery case 10 without lifting the vehicle or the like.
[0024]
Further, in the present electric vehicle, the batteries 22a and 22b are arranged at substantially the center of the vehicle, so that damage to the batteries 22a and 22b due to an impact such as an accident can be minimized. Further, since the case front 18 is formed of an iron plate, the deformation can be suppressed to a small one even when the vehicle collides. As a result, deformation of the battery case 10 can be suppressed, and damage to devices such as the batteries 22a and 22b accommodated therein can be suppressed. A case front 18 formed of an iron plate is disposed between the cabin 28 and the batteries 22a and 22b, and the case front 18 is fixed to the upper back 32 and the floor 36 by mounting portions 24 and 26. Yes. For this reason, it is possible to prevent the batteries 22a and 22b from dropping off from the battery stay 40 due to an inertial force during a forward collision or an offset collision, and the batteries 22a and 22b jumping into the cabin 28.
[0025]
Further, since the case front 18 is formed of an iron plate, it has a function of shielding electromagnetic noise generated from various devices housed in the battery case 10 and prevents intrusion of electromagnetic noise in the direction of the cabin 28. can do.
[0026]
The above embodiment can be modified in various ways. For example, a waterproof material for preventing battery liquid from leaching may be applied to the inner surface of the battery case 10 in the case front 18. In order to cool or warm up the batteries 22a and 22b accommodated in the battery case 10, or to ventilate the battery case 10, an outside air intake port and an exhaust port are provided in the case rear 16 and the case front 18. Also good.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a battery case of an electric vehicle according to an embodiment.
FIG. 2 is a cross-sectional view showing a battery case mounting state in the electric vehicle according to the present embodiment.
[Explanation of symbols]
10 battery case, 12 opening, 16 case rear, 18 case front, 22a, 22b battery, 28 cabin, 32 upper back, 36
floor.

Claims (8)

A case rear disposed behind the cabin and formed into a box shape having an opening that opens toward the cabin, and a battery is housed therein;
A case front for detachably closing the opening;
Battery case including
The opening of the case rear is opened only toward the backrest portion of the rear seat,
The case front is behind the rear seat, the back seat of the rear seat prevents exposure to the cabin, and the back seat of the rear seat can be tilted forward or exposed to the cabin with the rear seat removed. Placed in a position,
A battery mounting device used for driving a vehicle or the like. The battery mounting device according to claim 1,
At least part of the upper part of the case front is detachably attached to the upper rear part of the cabin,
At least a part of the lower part of the case front is detachably attached to a floor. A battery mounting device used for vehicle driving or the like. The battery mounting device according to any one of claims 1 and 2,
On the cabin floor on the luggage side from the case front, a battery stay formed with the central portion rising upward is fixed with a bolt at its end, and the case rear is placed and fixed on the battery stay. A battery mounting device used for driving a vehicle or the like. In the battery mounting device according to any one of claims 1 to 3,
A battery mounting device used for driving a vehicle or the like, wherein the battery case is provided with an exhaust port for ventilation. In the battery mounting device according to any one of claims 1 to 4,
A battery mounting device used for vehicle driving or the like, wherein a control device is stored together with a battery in a storage portion of the battery case. In the battery mounting device according to any one of claims 1 to 5,
The case front is formed of a highly rigid material, and is a battery mounting device used for vehicle driving or the like. In the battery mounting device according to any one of claims 1 to 6,
The case front has a function of shielding electromagnetic waves, and is a battery mounting device used for vehicle driving or the like. In the battery mounting device according to any one of claims 1 to 7,
A battery mounting device used for vehicle driving or the like, wherein the case rear is at least partially formed of a resin material.

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