Specification
Title of the invention: Determination method of heat dissipation material dispensing device
Technical field
[One]
The present invention relates to a method for determining a heat dissipating material dispensing device.
[2]
This application claims the benefit of priority based on Korean Patent Application No. 10-2017-0105934 filed August 22, 2017 and Korean Patent Application No. 10-2018-0097734 filed August 22, 2018. All contents disclosed in the literature are included as part of this specification.
Background
[3]
Batteries, televisions, videos, computers, medical equipment, office machines, communication devices, etc., generate heat during operation, and an increase in temperature due to the heat causes malfunction or destruction, so the above temperature rise is suppressed. A method of dissipating heat for this purpose, a heat dissipating member used therein, and the like have been proposed.
[4]
For example, a method of suppressing a temperature increase by transferring heat to a cooling medium such as cooling water or through heat conduction to a heat sink using a metal plate having high thermal conductivity such as aluminum or copper is known.
[5]
In order to efficiently transfer heat from the heat source to the cooling medium or heat sink, it is advantageous to connect the heat source and the cooling medium or heat sink as closely as possible or thermally connect the heat source and the cooling medium or heat sink, and for this purpose, a heat dissipating material may be used.
[6]
On the other hand, high heat dissipation performance is required due to the high output of the battery module, and a dispensing device that can increase the filling amount of the heat dissipation filler and reduce the thermal resistance to a thin thickness during filling and apply it to irregular regions is required.
[7]
In addition, when selecting a dispensing device, it is important to predict and determine the life and durability problems caused by wear.
Detailed description of the invention
Technical challenge
[8]
An object of the present invention is to provide a method of determining a heat dissipating material dispensing device capable of predicting life and durability due to wear.
Means of solving the task
[9]
In order to solve the above problems, according to an aspect of the present invention, there is provided a method of determining a heat dissipating material dispensing device, the method comprising: detecting an inner material of the dispensing device from the heat dissipating material leaked from the dispensing device; And determining suitability of the dispensing device based on the detected amount of the internal material.
[10]
In addition, in the step of determining suitability, when the inner material is detected to be less than a predetermined amount, the dispensing device may be determined to be suitable.
[11]
In addition, the inner material may include iron (Fe).
[12]
In addition, in the step of determining suitability, if iron is detected below 30 mg/kg, it may be determined that the dispensing device is suitable.
[13]
In addition, in the step of determining suitability, it may be determined that the dispensing device is suitable, preferably when iron is detected below 10 mg/kg.
[14]
In addition, the heat dissipation material may include a urethane-based resin component and a thermally conductive filler.
[15]
In addition, the heat dissipation material may include a filler having a Mohs hardness of 8 or more.
[16]
In addition, in the heat dissipating material, a filler having a Mohs hardness of 8 or more may be 80 wt% or more of the total filler.
[17]
In addition, the heat dissipation material may have a filler weight of 70 wt% or more of the total paste weight.
[18]
In addition, the splicing apparatus may include a dispensing unit having first and second supply cartridge units, and one or more static mixers each individually connected to the first and second supply cartridge units. At this time, the heat dissipation material is discharged to the outside through the static mixer. The present invention relates to detecting an internal material of a dispensing device from a heat dissipating material leaked to the outside through a static mixer.
[19]
In addition, the first supply cartridge unit may be provided to supply the main resin and the thermally conductive filler to the static mixer, and the second supply cartridge unit may be provided to supply the curing agent and the thermally conductive filler to the static mixer.
[20]
In addition, the first and second supply cartridge units may be configured as a gear pump type or a plunger type, respectively.
Effects of the Invention
[21]
As described above, according to the method of determining a heat dissipating material dispensing device according to an embodiment of the present invention, the suitability of the dispensing device is determined by detecting the inner material of the dispensing device from the heat dissipating material leaked from the dispensing device. You can decide.
Brief description of the drawing
[22]
1 is a schematic diagram showing a dispensing apparatus used in a method of determining a dispensing apparatus for a heat dissipating material according to an embodiment of the present invention.
[23]
2 is a schematic diagram showing yet another embodiment of a dispensing device.
[24]
3 and 4 are schematic diagrams illustrating embodiments in which a heat dissipating material is injected into a first external device.
[25]
5 is a schematic diagram of the static mixer shown in FIG. 1.
[26]
6 is a schematic diagram of a module case constituting a battery module.
[27]
7 is a schematic diagram showing a battery module.
[28]
8 is a schematic diagram for explaining an injection hole of a module case.
Mode for carrying out the invention
[29]
Hereinafter, a method of determining a heat dissipating material dispensing apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
[30]
In addition, regardless of the reference numerals, the same or corresponding components are given the same or similar reference numbers, and duplicate explanations thereof will be omitted, and the size and shape of each component member shown for convenience of explanation are exaggerated or reduced. Can be.
[31]
1 is a schematic diagram showing a dispensing device 10 used in a method of determining a heat dissipating material dispensing device according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating another embodiment of the dispensing device 10 ′. It is a schematic diagram, and FIGS. 3 and 4 are schematic diagrams illustrating embodiments in which a heat dissipation material is injected into the first external device 200.
[32]
In addition, FIG. 5 is a schematic diagram of the static mixer 100 shown in FIG. 1.
[33]
The heat dissipating material dispensing devices 10 and 10 ′ related to the present invention are devices for injecting a heat dissipating material including a room temperature hardening filler into an external device.
[34]
Referring to FIG. 1, a heat radiation material may be injected into external devices 200 and 300 through a dispensing device 10. The dispensing device 10 includes a dispensing unit 20 and one or more static mixers 100 connected to the dispensing unit 20. The external device may be a battery module.
[35]
In this document, a first external device refers to a first battery module, and a second external device refers to a second battery module. The first and second battery modules are only terms that are classified and referred to in order to describe process units performed in sequence, and have the same structure.
[36]
In the dispensing devices 10 and 10 ′, mixing and injection of the heat dissipating material is performed through the static mixer 100. In addition, mixing of the heat dissipation material may be performed in each static mixer 100, and injection of the heat dissipation material into one battery module may be performed through a plurality of static mixers 100.
[37]
6 is a schematic diagram of a module case 210 constituting a battery module, FIG. 7 is a schematic diagram showing the battery module 200, and FIG. 8 is a schematic diagram for explaining an injection hole 230 of the module case.
[38]
The battery module 200 includes a module case 210 and a plurality of battery cells 220 disposed in the module case 210. The battery cell 220 may be a pouch type secondary battery. The battery cell 200 may typically include an electrode assembly, an electrolyte, and a pouch case. The heat dissipation material is injected into the space between the battery cells in the module case, and performs a function of dissipating heat generated from the battery cells 220.
[39]
The module case 210 may have, for example, a rectangular parallelepiped shape, and may have a bottom surface 211, a side surface 212, and an upper surface 213. At this time, one or more injection holes 230 may be formed in the upper surface 213. In this case, one static mixer 100 is connected to one injection hole 230, so that the heat dissipating material flowing out from the static mixer 100 may be injected into the battery module 200 through the injection hole 230.
[40]
In addition, the step of injecting the heat dissipating material may be sequentially performed for a plurality of battery modules. For example, referring to FIG. 1, after injection of the heat dissipation material into the first battery module 200 is completed, the heat dissipation material may be injected into the second battery module 300. The first and second battery modules 200 and 300 are transferred by a transfer unit (for example, a belt conveyor), pass through the dispensing device 100 in turn, and a heat radiation material may be injected.
[41]
In the injection of the heat dissipation material, referring to FIG. 3, the heat dissipation material may be injected into one battery module (for example, the first battery module 200) through one static mixer, and referring to FIG. 4, a plurality of The heat dissipation material may be injected into one battery module (eg, the first battery module 200) through the static mixer 100.
[42]
A dispensing apparatus 100 for mixing and injecting a heat dissipating material according to the present invention includes a dispensing unit 20 and at least one static mixer 100 connected to the dispensing unit 20. The static mixer 100 may be provided to be replaceable.
[43]
In addition, the heat dissipating material mixed through a static mixer and injected into the battery module relates to a thermally conductive resin composition. The resin composition may contain a resin component and a thermally conductive filler.
[44]
The dispensing unit 20 includes a first supply cartridge unit 21 and a second supply cartridge unit 22. At this time, the first supply cartridge unit 21 and the second supply cartridge unit 22 are individually connected to the static mixer 100. In addition, the first supply cartridge unit 21 supplies a main resin and a thermally conductive filler for forming the resin composition to the static mixer 100, and the second supply cartridge unit 22 provides a static curing agent and a thermally conductive filler. It is supplied to the mixer 100.
[45]
Referring to FIG. 5, the static mixer 100 has an inlet 101 and an outlet 102. As described above, the inlet portion 101 is provided to be individually connected to the first supply cartridge portion 21 and the second supply cartridge portion 22, and the outlet portion 102 is a module case of the battery module 200 It is provided to be connected to the injection hole 230 provided in (210).
[46]
The static mixer 100 includes a screw unit 120 for mixing and transferring. The screw unit 120 is composed of a plurality of elements 121, one element 121 forms one end (B), the number of elements 121 may be referred to as a number.
[47]
In this case, the number of elements 121 of the static mixer 100 may be 5 to 25. If the number of elements 121 is insufficient, mixing efficiency may be degraded, thereby affecting curing speed, adhesion, insulation, etc., or reliability problems. On the other hand, when the number of elements 121 is excessively large, a mixer having a small diameter and a long length is used to maintain the same mixer capacity, so that the process speed is lowered.
[48]
In one embodiment, the static mixer 100 has a mixer inner diameter (D) of about 9 mm in which the screw portion 120 is disposed, the width of the screw portion 120 is 5 mm, and the diameter of the outlet portion 102 (A) This is 3mm, the mixer length (L) is 225mm, and the number of stages may be 24.
[49]
[50]
The first and second supply cartridge units 21 and 22 may each include a volumetric pump in order to supply the main resin and the curing agent to the static mixer. Volumetric pumps are pumps of a type in which fluids (for example, a main resin/hardener) are put into the space by placing a space in the reciprocating part or the rotating part and discharged in sequence, and are classified into a reciprocating pump and a rotary pump. The first and second supply cartridge units 21 and 22 may each include a reciprocating pump or a rotary pump.
[51]
The characteristic of the positive displacement pump is that the discharge amount varies during operation, but high pressure is generated and the efficiency is good. In addition, even if the pressure is changed, the discharge amount does not change.
[52]
The reciprocating pump is a pump in which a piston or a plunger reciprocates in a cylinder to suck in a fluid, compress it to a required pressure, and discharge it. There are several types of pumps. There are a manual pump equipped with a discharge valve on a piston, a single-acting plunger pump that sucks and discharges each time a rod-shaped plunger reciprocates, and a double-acting plunger pump that sucks and discharges every one reciprocation of the plunger. There are also pumps in which two or more single acting units are connected in parallel to reduce the change in discharge volume.
[53]
In addition, the reciprocating pump has a small amount of water, but has a simple structure, and is suitable for a high head (for high pressure). However, since the water supply pressure fluctuates severely in the reciprocating motion, there is a change in the discharge volume and it is difficult to control the water quantity.
[54]
In addition, the rotary pump is a pump that pumps liquid by rotation of one to three rotors, and has a simple structure and easy handling. The characteristic of the pump is that there is little fluctuation in the pumping quantity, it is relatively easy to obtain high pressure, and it is suitable for transporting liquids with high viscosity such as oil. There are many types depending on the shape or structure of the rotor, but representative ones include a vane pump, a gear pump, and a screw pump.
[55]
[56]
The present invention relates to a method of determining a heat dissipating material dispensing device.
[57]
A method of determining a heat dissipating material dispensing device includes detecting an inner material of the dispensing device from the heat dissipating material leaked from the dispensing device, and determining suitability of the dispensing device based on the detected amount of the inner material. The heat dissipation material leaked from the dispensing device means the heat dissipation material leaked from the static mixer.
[58]
In addition, an ICP analysis method may be used as a method of detecting the internal material. For example, the device used may be ICP-OES (Optima 8300DV), and 0.2g of the heat dissipation material leaked from the static sealer is treated with nitric acid/hydrogen peroxide, filtered using 0.45 μm PTFE Syringe, and analyzed with ICP-OES. I can.
[59]
In the step of determining suitability based on the analysis result, if the inner material is detected to be less than a predetermined amount, the dispensing device may be determined to be suitable.
[60]
In addition, the inner material may include iron (Fe).
[61]
In addition, in the step of determining suitability, if iron is detected below 30 mg/kg, it may be determined that the dispensing device is suitable.
[62]
In addition, in the step of determining suitability, it may be determined that the dispensing device is suitable, preferably when iron is detected below 10 mg/kg.
[63]
In addition, the heat dissipation material may include a urethane-based resin component and a thermally conductive filler.
[64]
In addition, the heat dissipation material may include a filler having a Mohs hardness of 8 or more.
[65]
In addition, in the heat dissipating material, a filler having a Mohs hardness of 8 or more may be 80 wt% or more of the total filler.
[66]
In addition, the heat dissipation material may have a filler weight of 70 wt% or more of the total paste weight.
[67]
[Table 1]
division Pump type filler Mohs hardness wt% Fe(mg/Kg) compatibility
Example 1 Gear Alumina 9 60 Less than 5 O
Example 2 Gear AlN 8 60 Less than 5 O
Example 3 Gear BN 2 80 Less than 5 O
Example 4 Ceramic thermal spraying gear Alumina 9 80 Less than 5 O
Example 5 plunger Alumina 9 80 Less than 5 O
Example 6 plunger Alumina 9 90 Less than 5 O
Comparative Example 1 Gear Alumina 9 80 135 X
Comparative Example 2 Gear Alumina BN 92 819 97 X
[68]
Referring to Table 1, the heat dissipating material preferably includes a filler having a Mohs hardness of 8 or more, and the heat dissipating material preferably has a filler having a Mohs hardness of 8 or more and 80 wt% or more of the total filler. In addition, the first and second supply cartridges Blowing can be composed of a gear pump type or a plunger pump type.
[69]
[70]
On the other hand, the heat dissipation material relates to a thermally conductive resin composition. The resin composition may contain a resin component and a thermally conductive filler.
[71]
In one example, the resin composition may be an adhesive composition, for example, a composition capable of forming an adhesive through a curing reaction. Such a resin composition may be a solvent type resin composition, an aqueous resin composition, or a non-solvent type resin composition. For example, a known acrylic adhesive, epoxy adhesive, urethane adhesive, olefin adhesive, EVA (Ethylene vinyl acetate) adhesive, or a resin composition capable of forming a silicone adhesive is mixed with a thermally conductive filler described below to form the resin composition. Can be manufactured.
[72]
The term resin component is used as a meaning including not only a component generally known as a resin but also a component that can be converted into a resin through a curing reaction or a polymerization reaction.
[73]
In one example, as the resin component, an adhesive resin or a precursor capable of forming an adhesive resin may be applied. Examples of such resin components include acrylic resins, epoxy resins, urethane resins, olefin resins, ethylene vinyl acetate (EVA) resins or silicone resins, or precursors such as polyols or isocyanate compounds, but are not limited thereto.
[74]
The resin composition can contain a thermally conductive filler together with a resin component. The term thermally conductive filler refers to a material having a thermal conductivity of about 1 W/mK or more, about 5 W/mK or more, about 10 W/mK or more, or about 15 W/mK or more. The thermal conductivity of the thermally conductive filler may be about 400 W/mK or less, about 350 W/mK or less, or about 300 W/mK or less. The type of the thermally conductive filler is not particularly limited, but a ceramic filler may be applied in consideration of insulation and the like. For example, ceramic particles such as alumina, aluminum nitride (AlN), boron nitride (BN), silicon nitride, SiC or BeO may be used. If insulating properties can be secured, application of carbon fillers such as graphite can also be considered.
[75]
The resin composition may include about 600 parts by weight or more of the thermally conductive filler based on 100 parts by weight of the resin component. In another example, the ratio of the filler may be 650 parts by weight or more or 700 parts by weight or more based on 100 parts by weight of the resin component. The ratio may be about 2,000 parts by weight or less, about 1,500 parts by weight or less, or about 1,100 parts by weight or less based on 100 parts by weight of the resin component. Physical properties such as desired thermal conductivity and insulation may be secured within the ratio of the filler.
[76]
If an excessive amount of filler is applied as described above to ensure thermal conductivity and insulation, the viscosity of the resin composition increases significantly, and thus the handling property decreases, and even after the resin material is formed, air bubbles or voids are included. It can fall.
[77]
Accordingly, at least three fillers having different particle diameters may be applied to the resin composition in a predetermined ratio.
[78]
The shape of the filler is not particularly limited, and may be selected in consideration of the viscosity and thixotropy of the resin composition, the possibility of sedimentation in the composition, target heat resistance or thermal conductivity, insulation, filling effect or dispersibility. For example, it is advantageous to use a spherical filler in consideration of the amount to be filled, but a non-spherical filler such as a needle or a plate may also be used in consideration of network formation, conductivity, and thixotropy. Can be used.
[79]
The resin composition basically includes the above components, that is, a resin component and a thermally conductive filler, and may include other components if necessary. For example, the resin composition is a viscosity modifier, for example, a thixotropic agent, a diluent, a dispersant, a surface treatment agent, or It may further contain a coupling agent and the like.
[80]
The thixotropy imparting agent may control the viscosity according to the shear force of the resin composition so that the manufacturing process of the battery module is effectively performed. As the thixotropic imparting agent that can be used, fumed silica and the like can be exemplified.
[81]
Diluents or dispersants are usually used to lower the viscosity of the resin composition, and any of various types known in the art may be used without limitation as long as it can exhibit the above-described action.
[82]
The surface treatment agent is for surface treatment of the filler introduced in the resin composition, and various types of those known in the art may be used without limitation as long as it can exhibit the above-described action.
[83]
In the case of the coupling agent, for example, it may be used to improve the dispersibility of a thermally conductive filler such as alumina, and any of various types known in the art may be used without limitation as long as it can exhibit the above-described action.
[84]
The resin composition may further include a flame retardant or a flame retardant aid. Such a resin composition can form a flame retardant resin composition. As the flame retardant, a variety of known flame retardants may be applied without any particular limitation, and for example, a solid filler-type flame retardant or a liquid flame retardant may be applied. Examples of the flame retardant include, but are not limited to, an organic flame retardant such as melamine cyanurate, or an inorganic flame retardant such as magnesium hydroxide.
[85]
When the amount of filler to be filled in the resin composition is large, a liquid type flame retardant material (TEP, Triethyl phosphate or TCPP, tris(1,3-chloro-2-propyl)phosphate, etc.) may be used. In addition, a silane coupling agent capable of acting as a flame retardant enhancing agent may be added.
[86]
[87]
Preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and those skilled in the art having ordinary knowledge of the present invention will be able to make various modifications, changes, and additions within the spirit and scope of the present invention. And additions should be seen as falling within the scope of the following claims.
Industrial availability
[88]
As described above, according to the method of determining a heat dissipating material dispensing device according to an embodiment of the present invention, the suitability of the dispensing device is determined by detecting the inner material of the dispensing device from the heat dissipating material leaked from the dispensing device. You can decide.
[89]
Claims
[Claim 1]
A method of determining a heat dissipating material dispensing device, the method comprising: detecting an internal material of the dispensing device from the heat dissipating material leaked from the dispensing device; And determining suitability of the dispensing device based on the detected amount of the internal material.
[Claim 2]
The method of claim 1, wherein when the inner material is detected in a predetermined amount or less, it is determined that the dispensing device is suitable.
[Claim 3]
The method of claim 2, wherein the inner material includes iron (Fe).
[Claim 4]
The method of claim 3, wherein the dispensing device is determined to be suitable when iron is detected to be 30 mg/kg or less.
[Claim 5]
The method of claim 4, wherein the dispensing device is determined to be suitable when the iron is detected to be 10 mg/kg or less.
[Claim 6]
The method of claim 1, wherein the heat dissipation material includes a urethane-based resin component and a thermally conductive filler.
[Claim 7]
7. The method of claim 6, wherein the heat radiation material includes a filler having a Mohs hardness of 8 or more.
[Claim 8]
The method of claim 7, wherein the heat dissipating material has a Mohs hardness 8 or more filler of 80 wt% or more of the total filler.
[Claim 9]
The method of claim 8, wherein the heat dissipation material has a filler weight of 70 wt% or more of the total paste weight.
[Claim 10]
The method of claim 1, wherein the dispensing device includes a dispensing unit having first and second supply cartridge units, and at least one static mixer individually connected to the first and second supply cartridge units, and the heat dissipating material is a static mixer. Method of determining a heat dissipating material dispensing device that is leaked to the outside through.
[Claim 11]
The method of claim 10, wherein the first supply cartridge unit is provided to supply the main resin and the thermally conductive filler to the static mixer, and the second supply cartridge unit is provided to supply the curing agent and the thermally conductive filler to the static mixer. Way.
[Claim 12]
The method of claim 10, wherein the first and second supply cartridge units are configured of a gear pump type or a plunger type, respectively.