阅读说明：本技术 电池冷却和加热装置以及包含这种装置的电池 (Battery cooling and heating device and battery comprising such a device ) 是由 沙巴纳·卡蒂布 于 2019-06-24 设计创作，主要内容包括：该电池冷却和加热装置包括板组件和加热构件,所述板组件导热材料制成,配置为定位在电池的单元之间,所述加热构件与由导热材料制成的所述板组件接触。(The battery cooling and heating apparatus includes a plate assembly made of a thermally conductive material configured to be positioned between cells of a battery, and a heating member in contact with the plate assembly made of a thermally conductive material.)

1. Battery cooling and heating device, characterized in that it comprises a plate (3) assembly made of heat-conducting material configured to be positioned between the cells (2a, 2b) of the batteries, and a heating member (15) in contact with said plate assembly made of heat-conducting material.

2. Device according to claim 1, wherein each plate comprises folded sides (11, 12) having a width substantially corresponding to the space between two units.

3. Device according to claim 2, wherein each plate comprises a folded lower or upper side (14) intended to receive the heating member.

4. Device according to one of claims 2 and 3, comprising two folded mutually opposite sides (11, 12) equipped with air bleed holes (13).

5. The apparatus of claim 4 further comprising fins supported on mutually opposite sides of the fold.

6. Device according to any one of claims 1 to 5, wherein the heating means comprise a plate (16) equipped with heating tracks.

7. Battery comprising an assembly of battery cells (2) and means (1) for cooling and heating the battery, characterized in that the cooling and heating means comprise an assembly of plates (3) made of a heat-conducting material, each arranged between two cells (2a, 2b) of the battery, in heat-exchanging relationship with the outside of the battery, and a heating member (15) mounted in contact with the assembly of plates.

8. The battery of claim 7, further comprising a housing at least partially enclosing the cell.

Technical Field

The present invention relates to batteries, in particular batteries for the aeronautical field, for example batteries mounted on aircraft.

More particularly, the present invention relates to cooling and heating of batteries to maintain them within an acceptable temperature range.

In particular, the invention is useful for temperature sensitive lithium ion batteries.

Background

The battery must be cooled to avoid any overheating, which may lead to thermal runaway and thus may lead to safety issues. This problem is exacerbated when the battery is installed on an aircraft.

The batteries must also be heated to be able to use them at or near full power levels. In fact, it has been noted that when the temperature of a lithium ion battery is too low, its performance is degraded.

For example, when its operating temperature is-10 ℃, only 50% of its maximum capacity can be used.

Today, there are various methods of cooling and heating batteries.

With regard to cooling, in the automotive field, the battery may be cooled by a hydraulic cooling system, with a coolant circulating around the battery housing.

Such techniques naturally require the provision of networks for supplying and circulating cooling fluids, which increase the overall quality of the battery, thus reducing the advantages associated with the use of lithium-ion batteries in terms of saving mass.

In addition, there are cooling systems based on the use of fans. However, this solution cannot be used in the aeronautical field, where batteries with sealed housings are generally used.

With regard to the heating of the batteries, current solutions are based on the use of cartridge heaters, electronic boards equipped with heating resistors or heating devices mounted on each unit above the batteries or on the whole batteries.

Also, this type of technology is accompanied by an increase in the weight of the battery assembly.

It is therefore an object of the present invention to overcome these various disadvantages.

Disclosure of Invention

The subject of the invention is therefore a battery cooling and heating device comprising a plate assembly made of heat-conducting material configured to be positioned between the cells of a battery, and a heating member, said device being provided with fixing means for mounting the heating member in contact with said plate assembly made of heat-conducting material.

Such a device, having a relatively simple structure, can therefore cool and heat the battery without significantly increasing the mass of the battery, using plates positioned between the cells to transfer heat.

According to another feature, each panel comprises folded sides, the width of which substantially corresponds to the space between two cells.

Each panel may comprise a folded lower or upper side intended to receive a heating member.

Advantageously, the device comprises two folded mutually opposite sides, said sides being provided with air relief holes.

Fins may also be provided to bear on the folded mutually opposite sides.

For example, the heating member includes a plate equipped with a heating track.

Another subject of the invention is a battery comprising a battery cell assembly and means for cooling and heating the battery, the cooling and heating means comprising a plate assembly made of a thermally conductive material, each arranged between two cells of the battery, in heat exchange relationship with the outside of the battery, and a heating member mounted in contact with said plate assembly.

The battery may further include a housing at least partially enclosing the cell.

Drawings

Other objects, features and advantages of the present invention will become apparent upon reading the following description, given by way of non-limiting example only and with reference to the accompanying drawings, in which:

fig. 1 is a general view of a battery equipped with a cooling and heating device according to the present invention; and

fig. 2 is an exploded view illustrating the positioning of a plate of the cooling device of fig. 1 between two battery cells.

Detailed Description

Fig. 1 shows the structure of a battery according to the invention, in this case a battery intended to be mounted on an aircraft.

The battery is shown in a vertical use position. However, the orientation of the cell as shown in the figures is not limited, and thus, the bottom-facing cell underside of fig. 1 may form the cell upper side.

The battery, only the main part of which is shown, designated by the general reference numeral 1, is advantageously formed by a conventional lithium ion cell, such as 2, for example, in this case 16 lithium ion cells. The cells have a planar structure and are placed in parallel side by side while being spaced apart from each other.

The battery 1 further comprises cooling and heating means for the cooling unit and for the heating unit to keep the units within the allowed operating temperature range, e.g. between 0 ℃ and 55 ℃.

The assembly is placed in a sealed housing (not shown), for example.

As can be seen, the cooling and heating means comprise a plate assembly (for example plate 3) made of a heat-conducting material, each plate being placed between two units (fig. 2), such as batteries 2a and 2b, in heat exchange relationship with the outside of the batteries.

The plates 3 are each made of a metal suitable for the intended use, for example, aluminum or copper, when it is desired to more quickly remove the heat.

The plates 3 each have a shape complementary to the shape of the unit, so as to be positioned relatively with respect to a substantial part, even the whole, of the large surface of the unit 2 and have a heat exchange relationship.

For example, as shown, the cells 2 and the plates 3 of the cooling and heating device have a square shape.

As can be seen, the plates 3 are each mounted on a supporting frame 4 equipped with holes, such as 6, for fixing on the batteries.

In this respect, the plates 3 are each equipped with a centring hole 7 and 8, in this case two, for engaging pins 9 and 10 provided on the support frame.

The plates 3 are each provided with two folded vertical sides 11 and 12, each forming a shoulder extending perpendicular to the plane of the plate. The width of the fold corresponds to the distance between the two units between which the sheet is inserted.

The folded side is provided with a gas-release notch 13.

The underside 14 of each panel is also folded and likewise forms an edge perpendicular to the plane of the panel. The folds are formed on the rear side of the plate with respect to the direction in which the plate is inserted between the battery cells.

The width of the resulting lower fold corresponds to the distance between the two panels. In contrast, the lower fold has no notches or holes to maximize the heat exchange surface.

The cooling and heating means are in fact completed by a heating member 15, which covers the lower surface of the unit assembly, bearing against the lower fold.

The heating member comprises a printed circuit board 16 equipped with fixing holes 17 for fixing the boards to the support frame 4 and comprising rails forming resistors bearing on the folded lower edge 14 of each board.

These resistors are powered by a power cable 18.

Therefore, when it is detected that the operating temperature of the battery is too low, the heating member is energized, and the heat recovered by the folded edge 14 of the plate 3 is transferred to the unit 2 through the plate.

The unit is also cooled by heat conduction, and the recovered heat is rejected due to the thermal inertia of the plates.

The thermal inertia can be increased by selectively adding fins (sinks) in contact with the folded sides 11 and 12 of the board.