KR100844652B1 - Radiant heat plate for battery cell - Google Patents

Abstract

The present invention relates to a heat dissipation plate of a battery cell, and more particularly, a plurality of cells are wrapped in a plate to protect them from external forces, and interlayer plates are also installed between cells to increase the heat receiving area from the cells and to increase heat conduction at the outer periphery of the cells. The present invention relates to a heat dissipation plate of a battery cell, in which an intermediate plate is formed into an uneven shape to allow cooling winds to pass between cells, thereby widening the heat dissipation area to improve cooling performance with a simple structure.

To this end, the present invention provides a heat dissipation plate of a battery cell that covers the entire cell with a high thermal conductivity plate to protect the cell from external forces when the plate-shaped battery cells are electrically connected in a predetermined array of sheets, and to increase the heat dissipation of the cells.

Heat Sink, Concave, Iron, Cooling Air Path

Description

Radiant heat plate for battery cell

1 is a cross-sectional view showing a heat sink structure of a conventional battery cell (cylindrical type),

2 is a cross-sectional view showing a heat sink structure of a conventional battery cell (plate type),

3 is a cross-sectional view showing an embodiment of a battery cell heat sink according to the present invention;

4 is a cross-sectional view showing another embodiment of a battery cell heat sink according to the present invention;

5 is a perspective view of FIG. 4,

6 is a cross-sectional view showing another embodiment of a battery cell heat sink according to the present invention;

7 is a perspective view of FIG. 6,

8 is a cross-sectional view showing another embodiment of a battery cell heat sink according to the present invention.

<Description of the symbols for the main parts of the drawings>

10a, 10b: battery cell 11110: first outer plate

12,120: second outer plate 13,130: intermediate plate

13a: main part 13b: iron part

14: cooling air passage

The present invention relates to a heat dissipation plate of a battery cell, and more particularly, a plurality of cells are wrapped in a plate to protect them from external forces, and interlayer plates are also installed between cells to increase the heat receiving area from the cells and to increase heat conduction at the outer periphery of the cells. The present invention relates to a heat dissipation plate of a battery cell, in which an intermediate plate is formed into an uneven shape to allow cooling winds to pass between cells, thereby widening the heat dissipation area to improve cooling performance with a simple structure.

In general, a battery of a vehicle is a power supply component for each element of the vehicle and repeats charging and discharging by the electric load and the power generation unit of the vehicle.

The temperature rise of the battery during this process causes a change in the internal resistance of the battery, the electrical performance is degraded, and the problem is that the efficient electrical management of the vehicle is not achieved.

In particular, with the recent development and application of secondary batteries for hybrid vehicles, the practical necessity of cooling the internal temperature of the battery to an appropriate level has increased.

On the other hand, as a prior art related to the cooling structure of the battery, Japanese Patent Laid-Open No. 2001-313015, as shown in Fig. 1, electrically connects a plurality of cells 1 to contact the outer surface of the battery and has a good thermal conductivity. The box structure provided with the heat exchanger plate 2 which consists of this is disclosed.

However, since the structure transfers heat from the outer circumferential surface of the cylindrical battery to the box via a bulky heat transfer plate, the heat dissipation performance is low, part space is required, and the part price is expensive.

In addition, as shown in FIG. 2, a battery cell (hereinafter, referred to as a cell) structure developed by a company co-developed with the company, which is an aluminum plate (100a, 100b), is a flat cell (10a, 10b) 2. It is a structure that covers the cabinet.

However, since the structure of two cells overlaps, the volume of the cell and the aluminum plate covering the cell is doubled compared to the case of one cell, and the central part between the overlapped cells does not have a heat dissipation part, so it is difficult to lose heat from the center part. It causes the performance to deteriorate.

The present invention has been made in view of the above, it is wrapped in a plurality of cells in a plate to protect from external forces, at the same time to install a middle plate between the cells to increase the heat transfer area from the cells and to increase the heat conduction to the outer periphery of the cells It is an object of the present invention to provide a heat dissipation plate of a battery cell in which an intermediate plate is formed into an uneven shape to allow cooling winds to pass between cells, thereby widening the heat dissipation area to improve cooling performance with a simple structure.

In order to achieve the above object, the present invention protects the cells from external forces when the plate-shaped battery cells are electrically connected in a predetermined arrangement of several sheets, and covers the entire cell with high thermal conductivity plates in order to increase heat dissipation of the cells.

In a preferred embodiment, when a plurality of cells are set as one set, an intermediate plate for transferring heat between the cells is provided.

In a more preferred embodiment, the cooling air passage is formed so that the cooling wind passes between the cell and the cell.

In particular, the first outer plate to be in close contact with the outer surface at the outer one end of the first cell, the intermediate plate extending in the opposite direction from the end of the first outer plate is in close contact with the inner surface between the cell and the; It extends in the opposite direction from the end of the intermediate plate is characterized in that it comprises a second outer plate wrapped to be in close contact with the outer surface to the outer other end of the second cell.

In addition, recesses and convex portions are alternately formed in the intermediate plate, and flat portions of the concave portions and convex portions are alternately brought into close contact with the first cell and the second cell, and the inner surface and the concave-convex portions of the first and second cells are alternately formed. Characterized in that the cooling air passage is formed so that the cooling wind passes therebetween.

In addition, the first outer plate surrounding the outer surface of the first cell, the second outer plate surrounding the outer surface of the second cell, and the first and second outer plate in close contact with the inner surface of the first and second cells It is composed of an intermediate plate inserted in parallel with, characterized in that the opening is formed on one side of the first and second outer plate so that one side of the first and second cell is exposed to the outside.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In general, a laminated lithium ion battery has a structure in which the periphery of the battery is covered with a laminate. However, this laminate has the disadvantage of being weak in strength and prone to tearing.

 When the heat sink according to the present invention requires surface protection and cooling of a laminated lithium ion battery or the like, the heat sink is wrapped with a plate such as aluminum having high thermal conductivity, so that the heat dissipation of the laminate It prevents breakage.

In addition, it serves to increase the heat-receiving area of the heat sink transmitted from the cells (10a, 10b) and to increase the heat dissipation performance.

Moreover, since the laminate is a soft material, it is difficult to fix it with retaining parts. However, the laminate has an effect of facilitating mechanical fixation by inserting it into a plate such as aluminum.

As shown in FIG. 3, in the case where two cells 10a and 10b having a wide surface overlap each other are wrapped with a heat sink, the cells are closely contacted with the cells outwardly from one end of the first cell 10a to widen the heat receiving area. A first outer plate 11 wrapped so as to be provided, an intermediate plate 13 extending in an opposite direction from the outer plate and penetrating between the cell and the cell, and a second cell 10b extending in an opposite direction from the intermediate plate 13. It consists of a second outer plate 12 surrounding the opposite end of the.

The heat sink as described above has an approximate " S " shape in which the first outer plate 11, the intermediate plate 13 and the second outer plate 12 are integrally formed.

When the outer surface of the two overlapping cells are wrapped with a plate, the intermediate plate 13 is inserted between the cells, thereby transferring heat received from the portion to the outer plate, thereby reducing heat retention and improving cooling performance. As a result, cell life is extended.

Specification of the plate-like plate material, surface treatment, plate thickness, shape is as follows in the preferred embodiment in Figures 4 to 8.

As shown in FIGS. 4 and 5, another embodiment of the heat sink according to the present invention has an “S” shape, but like the heat sink of FIG. 3, both surfaces of the intermediate plate 13 are formed of the first cell 10a and the second cell ( Instead of being in close contact with the inner surface of 10b), a rectangular or trapezoidal recess 13a and a convex portion 13b are alternately formed on the intermediate plate 13, and the flat portion of the recess 13a and the convex portion 13b is formed. By alternately in close contact with the first cell 10a and the second cell 10b, there is an effect of having a heat dissipation part between the cells and further improving the cooling performance.

As shown in FIGS. 6 and 7, another embodiment of the heat sink according to the present invention has a shape of “E” or “ㅌ”, and covers the outer surface of the cell so that one side of the cell is exposed to the outside. The outer plate 12 and the intermediate plate 13 in close contact with the inner surface between the cell, the other side of the cell so that the first outer plate 11, the intermediate plate 13 and the second outer One end of the plate 12 is connected.

As shown in FIG. 8, another embodiment of the heat sink according to the present invention is applied to a structure having a heat dissipation part in the intermediate plate 13 as in the case of the heat sinks of FIGS. 4 and 5, or to cover three or more cells. do.

With this configuration, unlike the heat sink structure of the existing cell, by inserting the intermediate plate 13 between the cell and the cell to transfer the heat of the center portion between the cells by the intermediate plate 13 to the outer plate, as well as the outer surface of the cell In addition, even the inner surface can be radiated evenly to improve the cooling performance of the cell.

In particular, by forming the recess 13a and the convex portion 13b in the intermediate plate 13 to provide the cooling wind passage 14, it is possible to maximize the heat dissipation performance of the center surface between the cells, and to improve the cooling performance of the cell. Can extend the life.

In addition, unlike the prior art that the raw material panel is cut into two sheets and overlapped at the center of the cell, the present invention can reduce the parts cost by bending the single raw material panel and eliminating unnecessary parts. Rather than covering and joining the panels, two cells can be inserted into an already molded heat sink to reduce assembly time.

While the invention has been shown and described with respect to certain preferred embodiments thereof, the invention is not limited to these embodiments, and has been claimed by those of ordinary skill in the art to which the invention pertains. It includes all the various forms of embodiments that can be carried out without departing from the spirit.

As seen above, according to the heat sink of the battery cell according to the present invention, unlike the heat sink structure of the existing cell, by inserting the intermediate plate between the cell and the cell by transferring the heat from the center of the cell to the outer plate by the intermediate plate, Not only the outer surface of the cell but also the inner surface can be uniformly radiated to improve the cooling performance of the cell.

In particular, by forming a recess and a convex portion in the intermediate plate to provide a cooling wind passage, it is possible to maximize the heat dissipation performance of the center plane between the cells, it is possible to extend the lifespan according to the improvement of the cooling performance of the cell.

In addition, unlike the prior art that the raw material panel is cut into two sheets and overlapped at the center of the cell, the present invention can reduce the parts cost by bending the single raw material panel and eliminating unnecessary parts. Rather than covering and joining the panels, two cells can be inserted into an already molded heat sink to reduce assembly time.

Claims (6)

delete delete delete In the heat dissipation plate of a battery cell that covers the entire cell with a high thermal conductivity plate in order to protect the cell from external force when the plate-shaped battery cells (hereinafter referred to as cells) are electrically connected in a predetermined arrangement, and to increase the heat dissipation of the cells, A first outer plate 11 wrapped to be in close contact with the outer surface at one outer end of the first cell 10a, and extending in opposite directions from an end of the first outer plate 11 to an inner surface between the cells; Including a close contact between the intermediate plate 13 and the second outer plate 12 extending in the opposite direction from the end of the intermediate plate 13 to be in close contact with the outer surface to the outer other end of the second cell (10b) Heat sink of the battery cell, characterized in that configured. The method according to claim 4, Concave portions 13a and convex portions 13b are alternately formed in the intermediate plate 13, and flat portions of the concave portions 13a and convex portions 13b are formed in the first cell 10a and the second cell 10b. In close contact with each other, a cooling wind passage 14 is formed between the inner surfaces of the first cell 10a and the second cell 10b and the uneven parts 13a and 13b to allow cooling air to pass therethrough. Heat sink of the battery cell. In the heat dissipation plate of a battery cell that covers the entire cell with a high thermal conductivity plate in order to protect the cell from external force when the plate-shaped battery cells (hereinafter referred to as cells) are electrically connected in a predetermined arrangement, and to increase the heat dissipation of the cells, The first outer plate 11 surrounding the outer surface of the first cell 10a, the second outer plate 12 surrounding the outer surface of the second cell 10b, and the first and second cells 10b. The intermediate plate 13 is in close contact with the inner surface of the first and second outer plate 12 and is inserted in parallel, wherein one side of the first and second cells 10b is exposed to the outside An opening is formed in one side of the first outer plate 11 and the second outer plate 12, and the first outer plate 11, the intermediate plate 13, and the second outer plate 12 so that the other side is sealed. Heat sink of the battery cell, characterized in that one end of the connection is formed.

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