KR101976589B1 - Heat dissipation cartridge and battery pack for electric vehicle using the same - Google Patents

Abstract

The present invention relates to a heat dissipation cartridge and a battery pack for an electric vehicle using the heat dissipation cartridge. The heat dissipation cartridge includes a receiving hole formed in a central region and a seat portion formed on a side wall of the receiving hole to seat the battery, , Said cartridge comprising: third and fourth guide members formed of engineering plastics and spaced apart from each other; A first guide member insert-injection-molded on the third and fourth guide members and polished on a side which is in close contact with the heat exchanger; And a second guide member insert injection-molded on the third and fourth guide members and spaced apart from the first guide member.

Description

TECHNICAL FIELD [0001] The present invention relates to a heat dissipation cartridge and a battery pack for an electric vehicle using the heat dissipation cartridge.

The present invention relates to a heat dissipation cartridge, and more particularly, to a heat dissipation cartridge that improves heat dissipation capability and does not cause deformation and has excellent rigidity, and a battery pack for an electric vehicle using the same.

In recent years, demand for thin-type energy storage devices such as electric vehicles, portable telephones, notebooks, and digital cameras is also rapidly increasing.

In such a thin type energy storage device, a secondary battery is used and a lithium secondary battery capable of high energy density and high output driving is increasingly used.

The lithium secondary battery is made of a pouch type battery to achieve a thin structure, and a pouch type battery is advantageous in that a large number of batteries can be connected to obtain a high capacity battery in a small area.

Here, when a plurality of pouch-shaped batteries are connected, the capacity increases, but the heat generated when each battery is charged and discharged is concentrated on a small area, which makes it difficult to stably operate the battery for a long time.

At present, it is necessary to develop a technology for extracting the heat of the pouch type battery to the outside.

Korean Patent Laid-Open Publication No. 2009-0107443 (Patent Document 1) discloses a heat dissipation plate interposed between battery cells. The heat dissipation plate includes a composite sheet in which a thermally conductive filler is filled in a matrix resin, And the carbon fibers are inserted into the composite sheet so as to extend from the inside of the heat dissipation plate to the edge of the heat dissipation plate.

When the heat dissipation plate of Patent Document 1 is inserted between the battery cells to stack the batteries and the thickness of the heat dissipation plate is increased as the thickness of the heat dissipation plate is increased, the thickness of the stacked module becomes thicker so that a large number of batteries can not be stacked in the same area, .

Korean Patent Publication No. 2009-0107443

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a heat dissipation cartridge capable of mounting a large number of batteries in the same area and maximizing heat dissipation efficiency and a battery pack for an electric vehicle There is.

Another object of the present invention is to provide a heat dissipation cartridge excellent in rigidity without causing deformation and a battery pack for an electric vehicle using the same.

According to an aspect of the present invention, there is provided a heat dissipation cartridge comprising: first and second guide members which support both longitudinal sides of a battery and are spaced apart from each other; Third and fourth guide members connected to both ends of the first and second guide members, respectively, to be in contact with both end electrode terminals of the battery; And a seating part formed on the sidewall of the battery receiving through hole formed in the central area by the first to fourth guide members to seat the battery, And is protruded from the side wall of the through hole.

Here, the first and second guide members are made of a metal material having excellent thermal conductivity, and the third and fourth guide members are made of a plastic material. Both ends of the first and second guide members are inserted into the first and second guide members And can be integrally connected.

The side surface of the first guide member contacting with the heat exchanger may be polished, and the exposed outer surface of the second guide member may be formed with a heat releasing protrusion.

Further, a TIM (Thermal Interface Material) coated on the polished side of the first guide member; And an emissive coating layer formed on an outer surface of the second guide member, the emissive layer being formed with heat-releasing protrusions and recesses to enhance heat radiation.

The battery pack may further include a conductive connecting member provided at a portion of the third and fourth guide members that is in contact with both end electrode terminals of the battery for electrical connection with a battery that is seated between adjacent heat dissipating cartridges.

The first and second guide members may be made of aluminum.

The battery pack for an electric vehicle according to an embodiment of the present invention may be realized by stacking a plurality of the above-described heat dissipation cartridges.

According to the present invention, by inserting and molding the first and second guide members into the third and fourth guide members formed of engineering plastics, the heat dissipation cartridge can be realized by the third and fourth guides It is possible to improve the rigidity by providing the member, and the deformation can be avoided, so that the excellent reliability can be obtained.

Also, since the heat dissipation cartridge includes the first and second guide members having excellent thermal conductivity, there is an advantage that the heat generated from the battery can be efficiently discharged.

According to the present invention, the outer surface of the first guide member constituting the heat dissipation cartridge is polished and the heat releasing irregularities are formed on the outer surface of the second guide member, thereby maximizing the heat releasing ability.

According to the present invention, since one heat dissipation cartridge has a thickness substantially equal to one battery thickness, it is possible to house a large number of batteries in a battery pack in which a plurality of heat dissipation cartridges are stacked, Slimming, lightening, and high capacity.

1 is a plan view of a heat dissipation cartridge according to the present invention,
2 is a schematic view for explaining a state where a heat exchanger is in contact with a heat dissipation cartridge in which a battery is mounted according to the present invention,
3 is a schematic cross-sectional view schematically showing a state in which a TIM is formed on a first guide member of a heat dissipation cartridge according to the present invention;
FIG. 4 is a cross-sectional view of a heat-dissipating cartridge stacked according to the present invention,
5 is a partial cross-sectional view illustrating a state in which the batteries are electrically connected to each other in the stacked heat dissipation cartridge according to the present invention;
6 is a conceptual perspective view of a battery pack for an electric vehicle according to the present invention.

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

In the present invention, a guide member is included in the cartridge so that the battery can be mounted and the heat generated from the battery can be efficiently discharged.

That is, referring to FIG. 1, the heat dissipation cartridge 300 of the present invention includes third and fourth guide members 101 and 102 formed of engineering plastics and spaced apart from each other; A first guide member (103) insert-molded on the third and fourth guide members (101, 102) and polished on a side thereof which is in close contact with the heat exchanger; And a second guide member 104 insert-molded into the third and fourth guide members 101 and 102 and spaced apart from the first guide member 103.

The heat dissipation cartridge 300 includes a rectangular battery receiving hole 110 formed in a central region and a seating portion formed on a sidewall of the battery receiving through hole 110 to seat the battery 200 (120).

That is, in the present invention, the first and second guide members 103 and 104 are insert injection molded into the third and fourth guide members 101 and 102, and the third and fourth guide members 101 and 102, A battery 200 having a rectangular shape (see FIG. 2) is formed in the seating portion 120 of the battery receiving through hole 110 of the heat dissipating cartridge 300 by implementing the rectangular heat dissipating cartridge 300 having the rectangular ring- As shown in FIG.

Here, the heat releasing protrusions and recesses may be formed on the side exposed to the outside of the second guide member 104.

Therefore, the heat dissipation cartridge of the present invention includes the third and fourth guide members 101 and 102 formed of engineering plastic, so that the rigidity is high and the deformation is not generated, so that it can have excellent reliability.

In addition, engineering plastics have not only strength and elasticity but also excellent properties such as impact resistance, abrasion resistance, heat resistance, cold resistance, chemical resistance and electrical insulation.

In addition, the heat dissipation cartridge of the present invention is provided with first and second guide members 103 and 104 made of a metal having excellent heat dissipation characteristics, so that heat generated from the battery can be efficiently discharged.

In the heat dissipation cartridge of the present invention, the outer surface of the first guide member 103 may be polished, and the outer surface of the polished first guide member 103 may be attached to the heat exchanger 500 (see FIG. 2) The heat of the battery transferred to the first guide member 103 can be dissipated quickly through the heat exchanger.

That is, even when the outer surface of the first guide member 103 is in close contact with the heat exchanger, the surface of the outer surface of the first guide member 103 before being polished may have fine irregularities, The cooling efficiency of the first guide member 103 is lowered by the air layer.

Therefore, in the present invention, by removing the fine irregularities formed on the outer surface of the outer surface of the first guide member 103 by the polishing process, the outer surface of the first guide member 103 is more firmly adhered firmly to the heat exchanger, The heat release capability of the heat exchanger can be increased.

It is preferable that the first and second guide members 103 and 104 are made of an aluminum material having excellent heat conductivity and low thermal conductivity.

In the present invention, the heat releasing protrusions 104a are formed on the side of the second guide member 104 exposed to the outside. This heat releasing protrusion 104a increases the contact area with the outside air and improves the heat emission efficiency to be transmitted to the second guide member 104. [

That is, as shown in FIG. 2, the battery 200 mounted on the heat radiation cartridge 300 generates heat by charging and discharging, and this heat is adhered to the first guide member 103 of the heat radiation cartridge 300 Is cooled by the heat exchanger (500) and is discharged through the heat releasing protrusions (104a) of the second guide member (104), so that the heat releasing efficiency can be improved.

In addition, in the present invention, the outer surface of the second guide member 104 having the heat releasing protrusions 104a may further be spin coated with a material having excellent heat radiation property so as to maximize the heat radiation efficiency.

The spin coating is for further maximizing the radioactivity of the heat transmitted to the second guide member 104. The second guide member 104 is coated with a ceramic material having heat radiation and insulation properties or a material having heat radiation and non- .

The ceramic material having thermal radiation and insulation may comprise at least one of boron nitride (BN), alumina, magnesia, silicon oxide, silicon carbide, titanium carbide, silicon nitride and aluminum nitride.

In addition, the material having heat radiation and non-insulating properties may include at least one of graphite, carbon, and CNT.

Referring to FIG. 3, a TIM (Thermal Interface Material) 130 may be coated on the side surface of the first guide member 103 to which the heat exchanger is closely attached.

Here, the polishing process may be performed on the side surface of the first guide member 103, or the polishing process may not be performed.

As described above, the TIM 130 coated on the side surface of the first guide member 103 reduces contact thermal resistance with the heat exchanger, minimizes the air layer between the heat exchanger and the first guide member 103, Can be smoothly performed.

The TIM 130 may be coated with heat-dissipating grease, thermally conductive adhesive, or the like.

4, the plurality of batteries 200a and 200b includes upper and lower seating portions (not shown) formed in the inner wall of the battery housing through holes of the plurality of heat dissipation cartridges 301, 302, and 303 in a state where a plurality of heat dissipation cartridges 301, 302, 121, 122, 123, 124, 125, 126).

Here, each of the plurality of heat dissipation cartridges 301, 302, and 303 has upper and lower seating portions 121, 122, 123, 124, 125, and 126 formed on the inner wall of the battery receiving through hole.

At this time, a plurality of batteries 200a and 200b are mounted while stacking a plurality of heat dissipation cartridges 301, 302, and 303.

For example, after the lower edge of the battery 200b is seated on the upper seating portion 125 of the heat dissipating cartridge 301, the lower seating portion 124 of the heat dissipating cartridge 302 is brought into contact with the upper edge of the battery 200b And a method of stacking the heat dissipation cartridge '302' on the heat dissipation cartridge '301' is used. That is, a plurality of batteries 200a and 200b are mounted while stacking a plurality of heat dissipation cartridges 301, 302, and 303.

Therefore, in the present invention, since one heat dissipation cartridge has a thickness substantially equal to one battery thickness, it is possible to embed a large number of batteries in a battery pack in which a plurality of heat dissipation cartridges are stacked, It is advantageous in that it can be made thin and high in capacity.

The electrode terminals 201, 202, 203, and 204 disposed at both ends of the plurality of batteries 200a and 200b are positioned between the heat dissipation cartridges 301, 302, and 303. 5, the electrode terminals 201 and 203 formed on one side of the plurality of batteries 200a and 200b are electrically connected to the conductive connecting member 210 disposed while enclosing the heat dissipating cartridge 302. As shown in FIG.

Here, the area of the heat radiation cartridge 302 enclosed by the conductive connection member 210 corresponds to third and fourth guide members formed of engineering plastic having electrical insulation, so that the conductive connection member 210 contacts the third and fourth guide members 210, An electrical short condition does not occur.

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The conductive connecting members 211 and 212 may be formed of a conductive line made of a metal such as Cu having excellent electrical conductivity or an electrically connected component including the conductive line. For example, a Cu electrode line film, a flexible PCB, or the like can be used.

Therefore, as shown in FIG. 6, a plurality of heat dissipation cartridges 300 according to the present invention may be stacked to form a battery pack 510 for an electric vehicle. 6 is a view for explaining the battery pack 510, and the illustration of the conductive connecting member connected to the electrode line of the battery 200 is omitted.

As described above, in the present invention, the battery pack 510 for an electric vehicle can be implemented by repeating the assembly process of mounting the battery 200 on the heat radiation cartridge 300 and laminating the heat radiation cartridge 300. Therefore, a battery pack 510 for an electric vehicle substantially identical to the stacked battery thickness (that is, the thickness t of the heat radiation cartridge 300 of FIG. 6 is substantially equal to the thickness of the battery 200) And the battery pack 510 for a high-capacity electric vehicle can be obtained.

For example, when 150 batteries are mounted on a battery pack for an electric vehicle, 149 heat radiating fins or heat dissipating plates are required when a battery pack is implemented through heat dissipation fins such as aluminum fins or prior art heat dissipation plates between the batteries, The battery pack can not be assembled by as many as 149 radiating fins or heat radiating plates in the battery pack, thereby reducing the battery capacity.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the embodiments set forth herein. Various changes and modifications may be made by those skilled in the art.

INDUSTRIAL APPLICABILITY The present invention can be applied to a heat dissipation cartridge which improves heat dissipation capability and which does not cause deformation and is excellent in rigidity.

101, 102: guide members 103, 104: metal guide member
110: Battery receiving hole 120, 121, 122, 123, 124, 125, 126:
130: TIM 200, 200a, 200b, 200c: battery
201, 202, 203, 204: electrode terminals 210, 211, 212:
300, 301, 302, 303: heat radiating cartridge 510: battery pack for electric vehicle

Claims (7)

First and second guide members which are spaced apart from each other by supporting longitudinally opposite side surfaces of the battery and made of a thermally conductive metal material;
Third and fourth guide members connected to both ends of the first and second guide members, respectively, and contacting the both-end electrode terminals of the battery, the third and fourth guide members being made of an electrically insulating plastic material; And
And a seating portion formed on a sidewall of the battery receiving through-hole formed in the central region by the first to fourth guide members to seat the battery,
The seat portion is protruded from the side wall of the battery receiving through hole so as to divide the battery receiving through hole horizontally,
Wherein the first guide member and the second guide member are integrally joined with the first and second guide members while the third and fourth guide members are molded by insert injection, Wherein the second guide member is formed with a heat releasing protrusion and a recess on an exposed outer surface thereof,
Further comprising a conductive connecting member provided on a portion of the third and fourth guide members that is in contact with both end electrode terminals of the battery for electrical connection with a battery that is seated between adjacent heat radiating cartridges. delete delete The method according to claim 1,
A TIM (Thermal Interface Material) coated on the polished side of the first guide member; And
And a radiation coating formed on an outer surface of the second guide member, the convexo-concave for heat dissipation being formed, to enhance heat radiation. delete The method according to claim 1,
Wherein the first and second guide members are made of aluminum. A battery pack for an electric vehicle in which a plurality of heat dissipation cartridges according to any one of claims 1, 4, and 6 are stacked.

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