JPH076796A - On-vehicle battery case - Google Patents

Abstract

PURPOSE:To cool multiple batteries sufficiently by embedding a coolant pipeline in a bottom plate and partitioning plates of a battery case, which is formed of a bottom plate, side walls and a cap plate and which houses batteries between the partitioning plates arranged inside thereof. CONSTITUTION:In a battery case, side walls 2 are stood along the peripheral edge of a bottom plate 1, and plural partitioning plates 7 are provided in parallel with each other inside thereof to house batteries 8. A cap plate is provided in the upper part of the battery case, and a coolant pipeline 26 is embedded in the bottom plate 1 and the partitioning plates 7. The cooling medium is flowed in this coolant pipeline 26 to cool the multiple batteries through the bottom of the battery, which contacts with the bottom plate 1, and the side wall of the battery, which contacts with the partitioning plates 7. Since a wide cooling area can be obtained, the necessary and the sufficient cooling is performed. Furthermore, a battery case can be reduced in weight by using a honeycomb plate made of aluminium alloy and a hollow shape material as the bottom plate 1 and the parttitioning palates 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle battery case adapted to accommodate a battery mounted on an electric vehicle.

[0002]

2. Description of the Related Art Conventionally developed electric vehicles use a large number of batteries (secondary batteries) and are generally installed in the upper or lower part of the floor, the luggage compartment or the like.

The battery uses 20 to 30 ordinary automobile batteries, occupies a large volume, and has a weight of 200 to 300 Kg. Although each battery generates heat during charging and discharging, there is no suitable cooling device, so it depends on natural air cooling (for example, JP-A-50-1).
No. 52415, JP-A-52-35023, and US Pat. No. 5,015,545).

[0004]

When the battery is naturally cooled, it is difficult to sufficiently cool it in an electric vehicle using a large number of batteries, and it is unavoidable to continue using the battery in a state of high temperature. As a result, there is a problem that the battery life is shortened.

Even if the batteries are installed at the bottom of the floor and the outside air is forcibly hit, it is difficult to supply sufficient cooling air to each battery because many batteries are used in a concentrated manner. , It was difficult to avoid the temperature rise.

[0006]

The present invention has been made in view of the problem of battery temperature rise as described above, and provides a vehicle-mounted battery case capable of sufficiently cooling a large number of batteries. Is intended.

In the vehicle-mounted battery case of the present invention which achieves the above object, side walls are provided upright along the peripheral edge of the bottom plate,
A plurality of partition plates are provided side by side inside, a battery can be accommodated between the partition plates, a lid plate is provided on the upper part, and a refrigerant pipe is embedded in the bottom plate and the partition plate. It is what

The bottom plate may be a honeycomb plate made of aluminum alloy (including aluminum), and the partition plate may be a hollow battery member made of aluminum alloy (including aluminum).

Further, it is also possible to provide an on-vehicle battery case in which an air passage is formed between the side wall and the partition plate and through the partition plate. A blower fan may be installed in such a ventilation path.

[0010]

According to the on-vehicle battery case of the present invention,
It is possible to hold the accommodated battery in a fixed state through the partition plate and to circulate the cooling medium through the refrigerant pipe, thereby individually cooling a large number of batteries through the bottom plate and the partition plate.

When the bottom plate is made of an aluminum alloy honeycomb plate and the partition plate is made of an aluminum alloy hollow mold member, the weight can be reduced and the honeycomb plate can withstand the heavy load of the battery.

Further, if an air passage is formed between the side wall and the partition plate and through the partition plate, cooling by circulation of the cooling medium and cooling by ventilation can be used together. Furthermore, if a ventilation fan is installed in the ventilation passage, the efficiency of cooling by ventilation can be improved.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a vehicle-mounted battery case of the embodiment, in which the wiring between the cover plate and the battery is removed. Sidewalls 2 are provided upright along the peripheral edge of a bottom plate 1 made of an aluminum alloy honeycomb plate. Bottom plate 1
As shown in FIG. 2, the honeycomb core 4 is sandwiched between the upper and lower face plates 3a and 3b. The side wall 2 is bent along the edge of the bottom plate 1, and a screw 6 is inserted into a mounting plate 5 that is continuously provided in an L shape inside the lower edge and is screwed and fixed to the face plate 3a. .

In the space surrounded by the side wall 2 on the bottom plate 1,
Partition plates 7 made of an aluminum alloy hollow mold member having a cross section as shown in FIG. 3 are arranged in parallel, and a battery 8 can be accommodated between the partition plates 7. In the illustrated embodiment, six partition plates 7 are arranged in parallel so that the batteries 8 can be accommodated in five rows.

Among the parallel partition plates 7, a bracket 9 having an L-shaped cross section is fixed to the outer side of the lower part of the outermost partition plate 7, and a horizontal piece 9a of the bracket 9 is perpendicular to the partition plate 7. A fixing bolt 10 inserted into a long hole 9b formed in the direction is screwed to the bottom plate 1 so that the partition plate 7 can be fixed. A space 11 is formed between the outer surface of the outermost partition plate 7 and the inner surface of the side wall 2. The space 11 is a space formed between the end portion (right side in FIG. 1) of the partition plate 7 and the side wall 2. 12 (that is, the spaces 11 and 12 form a U-shaped space in a plane).

The bottom plate 1 is arranged along each row of the batteries 8.
Above, as shown in FIGS. 1 and 4, the stopper 1
3 is fixed so as to correspond to the adjacent portion of the battery 8, and the locking piece 14 and the stopper 13 engaged with the upper portion of the battery 8 are tightened via the bolts 15,
Can be fixed in the longitudinal direction and the vertical direction of the row (note that the locking pieces 14 and the bolts 15 are not shown in FIG. 1 to avoid complication). Also,
A through bolt 16 is inserted into the partition plates 7 arranged side by side, and by tightening the bolts, the battery 8 and the partition plate 7 are brought into close contact with each other.

The other end of the outermost partition plate 7 (two sheets) (see FIG. 1)
Inner wall plates 17 standing on the bottom plate 1 are continuously provided at the middle left side) with a predetermined distance from the side walls 2, respectively.
A space 18 communicating with 1 and 12 is formed. This space 1
The side walls 2 forming 8 and the end edges of the inner wall plate 17 are opposed to each other with a predetermined interval maintained, and when air is blown inward from between the end edges of the inner wall plate 17, as shown by arrow 19, It passes through the inside of each partition plate 7 to the space 12, and reaches the space 18 via the space 11 as indicated by the arrow 20.

Between the edges of the inner wall plate 17, connectors 22 and 23 for refrigerant piping are provided via an L-shaped support plate 21 fixed to the bottom plate 1. One connector 22 is used as a refrigerant inlet and the other connector 23 is used as a refrigerant outlet. The manifold pipe 24 connected to the connector 22 and the manifold pipe 25 connected to the connector 23 are provided in the partition plate 7. The refrigerant pipe 26 embedded (inserted) and the bottom plate 1 are connected to the ends of the refrigerant pipe 27 embedded corresponding to the row of the batteries 8, and the refrigerant supplied through the connector 22 is the refrigerant from the manifold pipe 24. Parallel refrigerant flow passages are formed so that the refrigerant distributed to the pipes 26 and the refrigerant pipes 27 and flowing through the respective refrigerant pipes returns to the connector 23 through the manifold pipe 25. Reference numeral 28 in the figure denotes a solenoid valve provided between the connector 23 and the manifold pipe 25.

The partition plate 7 is a hollow mold member having a sectional shape as shown in FIG. That is, the pipe receivers 29 having an incomplete circular cross section are provided above and below the intermediate portion via the support pieces 30, and a large number of fins 31 are formed on the inner wall surface. The refrigerant pipe 26 has a long U-shape, and is embedded in the partition plate 7 so that two straight line portions are inserted into the pipe receivers 29.

The refrigerant pipe 27 also has a long U-shape and is embedded in the bottom plate 1 as shown in FIG. That is, the groove 32 is formed in advance on the upper surface side of the honeycomb core 4 constituting the honeycomb plate so as to match the refrigerant pipe 27, and the face plate 3a is fixed while the refrigerant pipe 27 is attached to the groove 32. The end portion of is embedded so as to project upward through the hole 33 of the face plate 3a.

FIG. 6 is a front view of a state in which the cover plate 34 is covered. The cover plate 34 is inserted with a screw 35 and screwed to a nut 36 fixed in the hollow mold member of the partition plate 7 (see FIG. 3).
In this way, it is detachably fixed. Each battery 8
Although necessary wiring and connection are made to the terminals of, the illustration and description are omitted here.

The lid plate 34 is composed of a metal plate, a synthetic resin plate, or the like. In the case of a synthetic resin plate, it is possible to check the internal wiring as a transparent plate.

In the on-vehicle battery case constructed as described above, the cooling medium is circulated through the refrigerant pipes 26 and 27, so that a large number of batteries 8 come into contact with the bottom plate 1 and the side walls that contact the partition plate 7, respectively. It can be cooled through the section. Since the cooling area can be widened,
Necessary and sufficient cooling can be performed.

Further, as shown in FIG. 7, the connector 2
An evaporator 37 of a refrigerant circulation system (not shown) is installed adjacent to the openings in which 2 and 23 are installed, and cool air that can be generated in this part is blown by the blower fan 38 between the edges of the inner wall plate 17. If this is done, the cold air will flow as indicated by arrows 19 and 2 as described above.
Since the partition plate 7 is cooled by flowing like 0, each battery 8 can be cooled through the side wall portion. An air blower fan 39 is installed in the space 11 and 18 so that the cold air returning to the space 18 is distributed to the air blower fan 39.
The cooling efficiency can be further increased by increasing the cooling efficiency.

The temperature of the battery 8 is monitored and the electromagnetic valve 28 is opened / closed according to the detected temperature to control the flow of the cooling medium.
Furthermore, by controlling the driving and stopping of the blower fans 38 and 39, it is possible to use the battery under temperature conditions that do not shorten the life of the battery.

Since the bottom plate 1 is a honeycomb plate made of an aluminum alloy and the partition plate 7 is a hollow mold member made of an aluminum alloy, the weight of the whole can be reduced. Also,
The bottom plate 1 has a honeycomb structure and exerts sufficient proof stress against the loads of a large number of batteries 8 and can prevent deformation such as warpage and dents.

[0028]

As described above, according to the present invention, a large number of batteries are accommodated and suppressed, and
As I made it possible to cool many batteries individually,
There is an effect that the movement of the battery can be eliminated, use of the battery in a state where the temperature is raised can be avoided, and the life of the battery can be prevented from being shortened.

Further, it is possible to reduce the weight and reduce the weight of the vehicle mounted as much as possible, and it is also possible to achieve high cooling efficiency by using air cooling or forced air cooling together with cooling by circulating a refrigerant. Is.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention with a cover plate removed.

FIG. 2 is a partially cutaway enlarged sectional view of a connecting portion between a bottom plate and a side wall of the embodiment.

FIG. 3 is a partially cutaway enlarged sectional view of the partition plate of the embodiment.

FIG. 4 is a view for explaining a battery adjacent portion of the embodiment, (a) is a perspective view in which a part of a stopper is cut off,
(B) is a partially broken enlarged view of a battery adjacent part.

FIG. 5 is also a buried view of the refrigerant pipe of the embodiment, (a) is a partially broken and enlarged sectional view, and (b) is a partially broken and enlarged plan view.

FIG. 6 is a front view of the same embodiment.

FIG. 7 is an explanatory diagram of a state of being connected to an evaporator in the same example.

[Explanation of symbols]

 1 Bottom plate 2 Side walls 3a, 3b Face plate 4 Honeycomb core 7 Partition plate 8 Battery 11, 12, 18 Space 13 Stopper 16 Through bolt 17 Inner wall plate 22, 23 Connector 24, 25 Manifold pipe 26, 27 Refrigerant piping 34 Lid plate 37 Evaporator 38 , 39 fan

Front Page Continuation (72) Inventor Nobuyuki Kawamura 5-3-8, Shiba, Minato-ku, Tokyo Within Mitsubishi Motors Corporation (72) Inoue Naotake Kumagai 5-33-8, Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation Company (72) Inventor Tomiji Owada 5-3-8, Shiba, Minato-ku, Tokyo Inside Mitsubishi Motors Corporation (72) Inventor Hisamitsu Koga 5-33-8, Shiba, Minato-ku, Tokyo Inside Mitsubishi Motors Corporation (72) Masao Kato, Inventor Masao Kato, 33-8, Shiba 5-33, Minato-ku, Tokyo Inside Mitsubishi Motors Corporation

Claims (4)

[Claims] 1. A side wall is provided upright along a peripheral edge of a bottom plate, a plurality of partition plates are provided side by side inside thereof, a battery can be accommodated between the partition plates, and a lid plate is provided on an upper part of the partition plate.
A vehicle battery case characterized in that a refrigerant pipe is embedded in the bottom plate and the partition plate. 2. The vehicle battery case according to claim 1, wherein the bottom plate is made of an aluminum alloy honeycomb plate, and the partition plate is made of an aluminum alloy hollow mold member. 3. The in-vehicle battery case according to claim 1, wherein an air passage is formed between the side wall and the partition plate and through the partition plate. 4. The on-vehicle battery case according to claim 3, wherein a blower fan is installed in the ventilation passage.