KR101976588B1 - Assembly type heat dissipation cartridge and battery pack for electric vehicle using the same - Google Patents

Abstract

The present invention relates to an assembly type heat dissipation cartridge and a battery pack for an electric vehicle using the assembly type heat dissipation cartridge. The assembly type heat dissipation cartridge includes a reception through hole provided in a central area and a seat part formed on a side wall of the reception through hole to seat the battery, Wherein the cartridge comprises a pair of guide members formed of plastic and spaced apart from each other; And first and second metal guide members having both ends coupled to the pair of guide members.

Description

[0001] The present invention relates to an assembly type heat dissipation cartridge and a battery pack for an electric vehicle using the assembly heat dissipation cartridge,

The present invention relates to an assembly type heat dissipation cartridge, and more particularly, to an assembled heat dissipation cartridge that can be assembled simply by assembling and capable of improving heat dissipation capability, 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

An object of the present invention is to provide an assembly type heat dissipation cartridge capable of mounting a large number of batteries in the same area and assembling them in a simple manner, and a battery pack for an electric vehicle using the same. .

Another object of the present invention is to provide an assembly type heat dissipation cartridge capable of maximizing heat dissipation efficiency and a battery pack for an electric vehicle using the same.

According to an aspect of the present invention, there is provided an assembly type heat dissipation cartridge including: first and second guide members that 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 accommodation hole formed in the central area by the first to fourth guide members to seat the battery, wherein the first and second guide members and the third and fourth guides And is detachably coupled between the members.

Here, a coupling groove is formed in each of the third and fourth guide members, and a coupling bar inserted into the coupling groove may be formed at both ends of the first and second guide members.

At this time, a locking groove may be formed in the third and fourth guide members and the coupling bar, and the locking pin may be inserted into the locking groove in a state where the coupling bar is coupled to the coupling groove.

Further, in a state where the coupling bar is engaged with the coupling groove, the interface exposed to the outside of the third and fourth guide members and the first and second guide members may be sealed with a bonding resin.

The third and fourth guide members may be thermally conductive non-insulating plastic or thermally conductive insulating plastic.

Wherein when the third and fourth guide members are made of the thermally conductive non-insulating plastic, the electrode terminals of the battery and the conductive connecting member connected to the electrode terminal are insulated from each other, And may further include a thermally conductive insulating member injected differently into the thermally conductive insulating plastic.

The conductive connecting member may surround an upper surface, a side surface, and a lower surface of the thermally conductive insulating member.

The thermally conductive non-insulating plastic may be a moldable non-insulating resin in which an electrically conductive heat-radiating filler is dispersed.

The plastic may also be engineering plastics.

Meanwhile, the first guide member may be spaced apart from the second guide member, and the side surface of the first guide member may be polished to be in close contact with the heat exchanger.

A TIM (Thermal Interface Material) may be coated on the side surface of the first guide member that is polished.

The first guide member may be spaced apart from the second guide member, and the heat releasing protrusions may be formed on the outer surface of the second guide member.

The outer surface of the second guide member having the heat releasing protrusions and recesses may be spin coated so as to improve the heat radiation efficiency.

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 assembled heat dissipation cartridges.

According to the present invention, by combining the first and second guide members with the third and fourth guide members formed of plastic to assemble the assembly type heat radiation cartridge, the manufacturing process can be simplified and a reproducible product can be obtained .

According to the present invention, since the assembly type 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 assembled heat radiation 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 assembly type heat dissipation cartridge has substantially the same thickness as one battery, it is possible to embed a large number of batteries in the battery pack in which a plurality of assembly type heat dissipation cartridges are stacked There is an advantage that the battery pack can be made slimmer, thinner, and higher capacity.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual plan view for explaining a process of assembling an assembled heat-
2 is a plan view of the assembly type heat dissipation cartridge according to the present invention assembled,
FIGS. 3A and 3B are partial cross-sectional views illustrating a method of assembling an assembly type heat dissipation cartridge according to the present invention;
4 is a partial cross-sectional view illustrating a method of assembling the assembly type heat dissipation cartridge by the coupling groove and the coupling bar according to the present invention,
FIG. 5 is a plan view showing a state where a battery is mounted on an assembled heat-
FIG. 6 is a plan view showing a state where a battery is mounted on an assembled heat dissipation cartridge in which a thermally conductive insulating member is heterogeneously injected according to the present invention. FIG.
7 is a plan view for explaining an assembly type heat dissipation cartridge for increasing heat dissipation efficiency according to the present invention,
8 is a schematic view for explaining a state in which the heat exchanger is in contact with the assembled heat dissipation cartridge of the structure of FIG. 7,
9 is a cross-sectional view of a battery pack mounted on an assembled heat dissipation cartridge stacked according to the present invention,
10 is a partial cross-sectional view for explaining a state in which the batteries are electrically connected to each other in a stacked assembly heat-radiating cartridge according to the present invention;
11 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 heat-radiating cartridge capable of mounting a battery and capable of efficiently discharging heat generated from a battery is manufactured by a simple assembling process.

Referring to FIG. 1, the assembly type heat dissipation cartridge of the present invention includes third and fourth guide members 101 and 102 formed of plastic and spaced apart from each other; And first and second guide members (103, 104) coupled to the third and fourth guide members (101, 102).

That is, the third and fourth guide members 101 and 102 formed of plastic are placed apart from each other, and the first and second guide members 103 and 104 are detachably coupled between the third and fourth guide members 101 and 102 Assembly heat dissipation cartridge 300 is assembled.

At this time, the coupling grooves 101a, 101b, 102a, and 102b may be formed in the third and fourth guide members 101 and 102 and the coupling grooves 101a, 101b, 102a, and 102b of the third and fourth guide members 101 and 102, 103b, 104a, 104b to be inserted into and coupled to the first and second guide members 103, 104 can be formed at both ends of the first and second guide members 103, 104, respectively.

Therefore, in the present invention, the coupling bars 103a, 103b, 104a and 104b of the first and second guide members 103 and 104 are engaged with the coupling grooves 101a, 101b, 102a and 102b of the third and fourth guide members 101 and 102, So that the assembly type heat dissipation cartridge can be assembled.

Meanwhile, the first and second guide members 103 and 104 are preferably made of a metal material having excellent thermal conductivity and low cost, for example, aluminum.

2, the assembly type heat dissipation cartridge 300 is formed with a receiving through hole 110 provided in a central region and a mounting portion 120 formed on a side wall of the receiving through hole 110 to seat the battery .

Therefore, in the present invention, the first and second guide members 103 and 104 are coupled to the third and fourth guide members 101 and 102 so that the third and fourth guide members 101 and 102 and the first and second guide members 103 and 104 5, the battery 200 is mounted on the seating portion 120 of the receiving through hole 110 of the assembly type heat dissipation cartridge 300 (see FIG. 5) You can.

Here, the plastic for forming the third and fourth guide members 101 and 102 may be a thermally conductive non-insulating plastic or a thermally conductive insulating plastic, and may also use engineering plastics.

The thermally conductive non-insulating plastic includes third and fourth guide members 101 and 102 having excellent thermal conductivity and conductivity by using a moldable non-tacky resin in which an electrically conductive heat-radiating filler made of a material such as graphene or carbon is dispersed Can be implemented.

The thermally conductive insulating plastic can be formed by using a moldable insulating resin obtained by dispersing an insulating heat-radiating filler such as BN, AlN, MgO, Al ₂ O ₃ , SiO _2, etc. to form third and fourth The guide members 101 and 102 can be formed.

In addition, since engineering plastics have excellent properties such as impact resistance, abrasion resistance, heat resistance, cold resistance, chemical resistance and electrical insulation as well as strength and elasticity, they are excellent in rigidity and deformation, 4 guide members 101 and 102 can be obtained.

3A and 3B, in the present invention, the first and second guide members 103 and 104 are coupled to the third and fourth guide members 101 and 102 by using the fastening pin and the bonding resin to assemble the assembled heat dissipation cartridge .

3A, the coupling bars 103a, 103b, and 103b of the first and second guide members 103 and 104 coupled to the coupling grooves 101a, 101b, 102a, and 102b of the third and fourth guide members 101 and 102, 103b, 104a, 104b of the third and fourth guide members 101, 102 and the first and second guide members 103, 104 are fastened to the coupling bars 101a, , 104a1 are formed.

Therefore, the coupling bars 103a, 103b, 104a, 104b of the first and second guide members 103, 104 are coupled to the coupling grooves 101a, 101b, 102a, 102b of the third and fourth guide members 101, The fastening pins 190 are fastened to the fastening grooves 101c and 104a1 of the third and fourth guide members 101 and 102 and the first and second guide members 103 and 104 to be assembled.

As shown in FIG. 3B, the coupling bars 103a, 103b, 104a, and 104b of the first and second guide members 103 and 104 are engaged with the coupling grooves 101a and 101b of the third and fourth guide members 101 and 102, The first and second guide members 103 and 104 and the third and fourth guide members 101 and 102 may be sealed with a bonding resin 191 to be assembled.

At this time, the first and second guide members 103 and 104 and the third and fourth guide members 101 and 102 may be bonded to each other by the bonding resin 191, but the first and second guide members 103 and 104, The boundary surfaces exposed to the outside of the third and fourth guide members 101 and 102 can be sealed with the bonding resin 191 to make the bonding state solid.

4, a plurality of coupling bars 104a are formed at both ends of the first and second guide members 103 and 104, and coupling grooves 101a corresponding to the plurality of coupling bars 104a are formed. It is possible to improve the bonding strength.

6, when the third and fourth guide members 101 and 102 are formed of thermally conductive non-insulating plastic, the electrode terminals 201 and 202 of the battery 200 and the electrode terminals 201 and 202 are connected to each other Conductive insulating members 181 and 182 may be formed by thermally insulating insulating members 181 and 182 on the third and fourth guide members 101 and 102 so that the conductive connecting members 211 and 212 can be electrically insulated from each other.

The battery terminals 200 and the electrode terminals 201 and 202 of the battery 200 are brought into contact with the thermally conductive insulating members 181 and 182 so that the thermally conductive insulating members 181 and 182 made of thermally- Thereby maintaining the electrically insulated state.

The electrode terminals 201 and 202 are electrically connected to the conductive connection members 211 and 212 for connection to the electrode terminals of the battery 200 mounted on the adjacent assembly type heat dissipation cartridge. At this time, the conductive connecting members 211 and 212 are in contact with the thermally conductive insulating members 181 and 182 so as to maintain an electrically insulating state with the assembled heat-radiating cartridge.

7, the side surface of the first guide member 103 which is in close contact with the heat exchanger is polished and is exposed to the outside of the second guide member 104 which is spaced apart from the first guide member 103 The heat releasing irregularities can be formed.

Therefore, in the assembled 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 completely adhered to the heat exchanger, The heat of the battery transferred to the member 103 can be quickly dissipated 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.

In the present invention, the heat releasing protrusions and protrusions are formed on the side exposed to the outside of the second guide member 104. The heat releasing protrusions and the heat releasing protrusions increase the contact area with the outside air, Thereby improving the emission efficiency of the transmitted heat.

That is, as shown in FIG. 8, the battery 200 mounted on the assembly type heat radiation cartridge 300 generates heat by charging and discharging, and this heat is transferred to the first guide member 103 , And is discharged through the heat releasing protrusions and recesses of the second guide member 104, so that the heat releasing efficiency can be improved.

In addition, in the present invention, spin coating can be further performed on the outer surface of the second guide member 104 having the heat-releasing protrusions and recesses so as to maximize the heat radiation efficiency as a material having excellent heat radiation properties.

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.

A TIM (Thermal Interface Material) may be coated on the side surface of the first guide member 103 to which the heat exchanger 500 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.

Thus, the TIM coated on the side surface of the first guide member 103 reduces contact thermal resistance with the heat exchanger 500 and minimizes the air layer between the heat exchanger and the first guide member 103, ) Can smoothly discharge heat.

The TIM type can be used as coating material such as thermal grease or thermally conductive adhesive.

9, the plurality of batteries 200a and 200b may be formed by stacking a plurality of assembled heat-dissipating cartridges 301, 302, and 303 in the upper and lower portions formed in the inner wall of the receiving through- 121, 122, 123, 124, 125, 126, respectively.

Here, each of the plurality of assembly type 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 thereof to divide the through hole.

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

For example, after the lower edge of the battery 200b is seated in the upper seating portion 125 of the assembled heat dissipation cartridge 301, the lower seating portion 124 of the assembled heat dissipation cartridge 302 is inserted into the upper portion of the battery 200b And the assembly type heat dissipation cartridge '302' is stacked on the assembly heat dissipation cartridge '301'. That is, a plurality of batteries 200a and 200b are mounted while stacking a plurality of assembly type heat dissipation cartridges 301, 302, and 303.

Therefore, in the present invention, since one assembly type heat dissipation cartridge has a thickness substantially equal to one battery thickness, it is possible to house a large number of batteries compared to the same area in a battery pack in which a plurality of assembly type heat dissipation cartridges are stacked, It is possible to make the pack slimmer, thinner, and higher capacity.

The electrode terminals 201 and 203 disposed at both ends of the plurality of batteries 200a and 200b are positioned between the assembled heat dissipation cartridges 301, 302 and 303. 10, the electrode terminals 201 and 203 formed on one side of the plurality of batteries 200a and 200b are electrically connected to the conductive connection member 210 disposed while surrounding the assembly type heat radiation cartridge 302. In this case, do.

Here, the region of the assembly type heat radiation cartridge 302 enclosed by the conductive connection member 210 corresponds to a thermally conductive insulating member.
The conductive connecting member 210 may be formed of a conductive line made of a metal such as Cu having excellent electrical conductivity or an electrically connected part including the conductive line. For example, a Cu electrode line film, a flexible PCB, or the like can be used.

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Therefore, as shown in FIG. 11, a plurality of the assembly type heat dissipation cartridges 300 according to the present invention can be stacked to form a battery pack 510 for an electric vehicle. 11 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 assembling process of mounting the battery 200 to the assembled heat-radiating cartridge 300 and laminating the assembled heat- . Therefore, a battery pack 510 for an electric vehicle substantially identical to the stacked battery thickness (that is, the thickness t of the assembled heat radiation cartridge 300 of FIG. 11 is substantially equal to the thickness of the battery 200) There is an advantage that a battery pack 510 for an electric vehicle with a high capacity 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 an assembled heat dissipation cartridge which improves heat dissipation capability, and which does not cause deformation and is excellent in rigidity.

101, 102: guide members 101a, 101b, 102a, 102b:
101c, 104a1: fastening grooves 103, 104:
103a, 103b, 104a, 104b: coupling bar 110: through hole
120, 121, 122, 123, 124, 125, 126: seat parts 181, 182:
190: fastening pin 191: bonding resin
200, 200a, 200b, 200c: batteries 201, 203: electrode terminal
210: conductive connecting member 300, 301, 302, 303: assembled heat-
500: Heat exchanger 510: Battery pack for electric vehicle

Claims (14)

First and second guide members that support both longitudinal sides of the 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
And a seating part formed on a sidewall of the accommodation hole formed in the central area by the first to fourth guide members to seat the battery,
And a detachable coupling between the first and second guide members and the third and fourth guide members,
Wherein the first and second guide members are made of a metal material, the third and fourth guide members are made of a thermally conductive non-insulating plastic,
Conductive connection member for connecting the electrode terminal of the battery and the electrode terminal is made to be electrically insulated from each other, the third and fourth guide members are each provided with a thermally conductive insulating member which is differentially injected into the thermally conductive insulating plastic And the conductive connecting member surrounds the upper surface, the side surface and the lower surface of the thermally conductive insulating member,
Wherein the thermally conductive non-insulating plastic is a moldable non-thermoplastic resin in which an electrically conductive heat-radiating filler is dispersed. The method according to claim 1,
Wherein a coupling groove is formed in each of the third and fourth guide members and a coupling bar inserted into the coupling groove is formed at both ends of each of the first and second guide members. 3. The method of claim 2,
The third and fourth guide members and the coupling bar are formed with coupling grooves,
Wherein a coupling pin is inserted into the coupling groove in a state where the coupling bar is coupled to the coupling groove. 3. The method of claim 2,
In a state where the coupling bar is engaged with the coupling groove,
Wherein an interface between said third and fourth guide members and said first and second guide members is sealed by a bonding resin. delete delete delete delete delete The method according to claim 1,
Wherein the first guide member is polished on a side contacting the heat exchanger,
Wherein the second guide member has an exposed outer surface formed with heat-dissipating protrusions and recesses. 11. The method of claim 10,
And a TIM (Thermal Interface Material) is coated on a side surface of the first guide member that is polished. The method according to claim 1,
Wherein the seating portion is formed with upper and lower seating portions from the side wall of the receiving through-hole so as to divide the receiving through-hole. 11. The method of claim 10,
Wherein the outer surface of the second guide member having the heat releasing protrusions and protrusions is spin coated to increase the heat radiation efficiency. 13. A battery pack for an electric vehicle, comprising: a plurality of assembly heat dissipation cartridges according to any one of claims 1 to 4;

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