JP6606783B2 - Air cooling heat dissipating part for storage battery and manufacturing method of air cooling heat dissipating part for storage battery - Google Patents

Description

The present invention relates to an air-cooled heat radiating component for a storage battery that requires heat dissipation and a method for manufacturing an air-cooled heat radiating component for a storage battery .

There are heat dissipating parts that require heat dissipating, such as storage battery parts, electronic parts, and motor parts.
For example, various electronic components such as an IC package used in a small electronic device such as a laptop are increasing in heat density year by year with the integration. For this reason, heat sinks are used to promote heat dissipation of various electronic components such as IC packages to ensure reliability.
This heat sink is composed of a base plate to which a heat generating element is attached and a fin for radiating heat from the base plate. The cooling method is roughly classified into natural cooling using convection of air generated by generated heat and forced cooling using a cooling medium such as water, forcibly convection of air by a fan.
Conventionally, this heat dissipating part is attached to various electronic parts such as IC packages by using a method of adhering a heat dissipating part such as a heat sink with a heat conductive adhesive, a heat conductive double-sided tape, bolts, clips, It is fixed.

  In this conventional bonding method, for example, when a heat conductive adhesive is used, the heat conductive adhesive peels off due to secular change, and the peeled heat-dissipating component adheres to the conductive part inside the device, causing a failure of the device. There was a problem of becoming. In addition, a waiting time is required until drying after bonding with the heat conductive adhesive, which has been an obstacle to improving productivity.

  As a countermeasure against this, in Patent Document 1, a heat radiation component made of a highly heat conductive metal is provided with a rubber sheet having good heat conductivity and elasticity between the contact portion and the electronic component, and the mounting portion. Disclosed is a structure for mounting a heat dissipating component to an electronic component in a small electronic device in which the device is fixed to a structural component inside the device by a mechanical means such as a bolt.

JP-A-6-77367

  The heat dissipating component mounting structure disclosed in Patent Document 1 requires cost and time for fixing the heat dissipating component, and is not suitable for mass production. In addition, fixing with bolts increases the number of processes, resulting in poor efficiency and low productivity.

  The present invention has been made in view of the above problems in the prior art, and an object of the present invention is to provide a heat radiating component and a method for manufacturing the heat radiating component that can provide a large cooling effect while simplifying the mounting of the heat radiating component.

    That is, the heat dissipating part according to the present invention is a heat dissipating part comprising a metal part, a resin holder for mounting the metal part, and a heat dissipating fin installed so as to be able to transfer heat from the metal part. And a fitting part for fitting the radiation fin locking part is provided on the radiation fin.

  As the heat dissipating fins, those formed by extrusion molding can be used, thereby improving productivity.

  The method of manufacturing a heat dissipation component according to the present invention includes a step of arranging a metal component in a mold, a step of filling a resin in a mold in which the metal component is disposed, a heat dissipation fin in the mold, and the metal component. A resin runner is formed in the radiating fin, and a resin is filled in the mold to fill the resin runner of the radiating fin with resin. And

The metal part is preferably subjected to a surface treatment for improving adhesion with the resin.
Such methods include various chemical conversion treatments, anodizing treatments (alumite treatments), KO treatments and soft etching to create unique ultra-fine irregular shapes on the surface of metal parts and improve the adhesion strength with the resin. is there.

  The resin flow path of the radiating fin is a first recess formed in the radiating fin, and the shortest distance between the opposing surfaces forming the first recess is smaller than the width of the opening of the first recess. By providing a large portion, it is possible to prevent the resin from falling off from the first concave portion of the radiating fin after the resin is solidified.

  According to the storage battery component, electronic component, prime mover component and other components that require heat dissipation, that is, the heat dissipation component and the method of manufacturing the heat dissipation component, the heat dissipation component that simplifies the mounting of the heat dissipation component and provides a great cooling effect, and It becomes possible to obtain the manufacturing method of a heat radiating component.

It is a top view of the thermal radiation component which concerns on one embodiment of this invention. It is a fragmentary perspective view of the thermal radiation component which concerns on one embodiment of this invention shown in FIG. It is another partial perspective view of the thermal radiation component which concerns on one embodiment of this invention shown in FIG. It is the (a) perspective view, (b) rear view, (c) front view of the components used for the heat radiating component which concerns on one embodiment of this invention shown in FIGS. 1-3. FIG. 5A is a partial cross-sectional schematic diagram of the heat-radiating component according to the embodiment of the present invention shown in FIG. 4, and FIG. 5B is a schematic partial cross-sectional view of FIG. It is a schematic cross section of the metal mold | die used for the manufacturing method of the thermal radiation component of this invention, Fig.6 (a) shows the site | part corresponded to FIG.1VIa-VIa, FIG.6 (b) corresponds to FIG.1VIb-VIb. Indicates the site. It is a partial cross section schematic diagram corresponding to Drawing 5 (a) of a part of heat dissipation parts concerning other embodiments of the present invention. It is (a), (b), (c) each cross-sectional schematic diagram of the component of the thermal radiation component which concerns on other embodiment of this invention. It is (a), (b), (c) each cross-sectional schematic diagram of the component of the thermal radiation component which concerns on other embodiment of this invention.

A heat radiating component and a method of manufacturing the heat radiating component according to an embodiment of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 to 3, the heat dissipating component 1 according to the embodiment of the present invention is configured in such a manner that the metal component 3 and the heat dissipating fins 4 are supported by the resin holder 2. In such a state, the metal part 3 and the radiating fin 4 are brought into direct contact with the opposite side surface of the main body 6 where the fin 5 of the radiating fin 4 is formed on one side surface 3a of the integral extension part of the metal part 3. Heat transfer between each other.

  As shown in FIG. 4A, the radiation fin 4 is formed by forming four rows of fins 5 integrally with the main body 6. A first recess 7 is provided on the opposite side surface of the main body 6 where the plurality of fins 5 are formed. As shown in FIGS. 5 (a) and 5 (b), the first recess 7 of the radiating fin 4 serves as a fitting portion that fits with the radiating fin locking portion 2 a formed integrally with the resin holder 2.

As shown in FIG. 4 (b), the first recess 7 serving as a fitting portion to be fitted to the radiating fin locking portion 2 a goes straight from one end to the other end in the longitudinal direction of the radiating fin 4 as with the fin 5. Open end portions 7a and 7b are formed at one end and the other end.
As described above, the radiating fin 4 is formed in such a manner that the first concave portion 7 is formed to go straight from one end to the other end in the longitudinal direction of the radiating fin 4 like the fin 5. As a result, the radiating fin 4 is extruded. Can be manufactured with good productivity.
As shown in FIG. 4C, the first recess 7 is gradually expanded inward from the opening 7c. As a result, the width W1 of the opening 7c of the first recess 7 is In comparison, the shortest interval W2 between the opposing surfaces 8a and 8b forming the first recess 7 is made large.

FIG. 6 shows a schematic cross-sectional view of a mold 9 for supporting the metal part 3 and the radiating fin 4 by the resin holder 2.
As shown in the figure, a region for placing the metal component 3 is formed in the mold 9, and the metal component 3 is placed in that portion. Further, a region for disposing the radiation fins 4 is formed in the mold 9, and the side surface on the opposite side of the main body portion 6 where the fins 5 of the radiation fins 4 are formed is one side surface 3 a of the integral extension portion of the metal part 3. The heat radiating fins 4 are arranged in a region where the heat radiating fins 4 are arranged so as to be in direct contact with each other. When the resin supporting the metal part 3 is filled in the mold 9 in this state, the first recess 7 of the radiating fin 4 becomes a resin runner, and the first recess 7 extends from one end of the longitudinal direction to the other end. The inside is filled with resin. Thereafter, the entire filled resin is solidified and contracted, so that the heat radiation fins 4 and the resin holder 2 are firmly in close contact with each other between the first and second recesses 7.

In particular, the first recess 7 serving as a resin runner is formed in an anchor-like form that gradually expands inward from the opening 7c. It will be in the state fitted firmly with the recessed part 7. FIG.
Further, the metal part 3 is also firmly supported by the resin holder 2, and at the same time, the side surface on the opposite side of the main body part 6 where the fins 5 of the radiation fins 4 are formed by the shrinkage effect of the resin is one of the integral extension parts of the metal part 3. It is possible to obtain the heat dissipating component 1 that is in direct contact with the side surface 3a and pressed against each other to ensure high thermal conductivity.

  Aluminum can be used as the metal part 3. The resin that forms the resin holder 2 is polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polybutylene-ethylene terephthalate (PBT-PET copolymer resin), polyether ether ketone (PEEK resin), polyphenylene sulfide (PPS). ), Polyetherimide (PEI), 6 nylon (PA6), 6-6 nylon (PA66), 6T nylon (PA6T), polyphthalamide (PPA), polystyrene (PS), ABS resin (ABS), vinyl chloride resin Thermoplastic resins such as (PVC), polyacetal (POM), liquid crystal polymer (LCP), polysulfone (PSU), polypropylene (PP), and polycarbonate (PC). These can be used alone or in combination. Thermosetting resins such as phenol resin (PF), epoxy resin (EP), diallyl phthalate resin (PDAP), silicone resin (SI), polyimide resin (PI), melamine resin (MF), urea resin (UF) It is. In order to improve heat resistance and dimensional stability, inorganic fillers such as carbon fibers, glass fibers, glass beads, and talc may be appropriately blended with these thermoplastic resins and thermosetting resins. Moreover, you may mix | blend organic fillers, such as a cellulose nanofiber suitably.

FIG. 7 is a partial cross-sectional schematic view corresponding to FIG. 5A of a heat dissipation component according to another embodiment of the present invention.
In the heat dissipating component of the present embodiment, a pair of heat dissipating fins 4 a and heat dissipating fins 4 b are disposed symmetrically via one side surface 3 a of the integrally extending portion of the metal component 3. Therefore, the resin holder 2 has a fitting portion that fits with the first recess 7b of the radiation fin 4b in addition to the radiation fin locking portion 2a that becomes a fitting portion that fits with the first recess 7a of the radiation fin 4a. The radiating fin locking portion 2b is formed integrally with the radiating fin locking portion 2a. As a result of the heat radiation fin locking portion 2a and the heat radiation fin locking portion 2b being integrally formed as described above, the main body in which the fins 5a, b of the heat radiation fins 4a, b are formed by the solidification shrinkage after the resin filling as a driving force. The side surfaces of the portions 6a and 6b are firmly pressed against both side surfaces 3a of the integral extension portion of the metal part 3, and adhesion is improved and high heat conduction is obtained.

Fig.8 (a) shows the partial cross-section schematic diagram corresponding to FIG. 5 (a) of the component of the thermal radiation component which concerns on other embodiment of this invention.
In the heat dissipating component of the present embodiment, the resin holder 2 is locked to the side of the heat radiating fin 4 in addition to the heat radiating fin locking portion 2a which is a fitting portion to be fitted to the first recess 7 of the heat radiating fin 4. The side locking portion 2c to be formed is integrally formed. As shown in the drawing, the heat dissipating fin engaging portion 2a and the side engaging portion 2c are integrally formed. As a result, the main body portion 6 in which the fins 5 of the heat dissipating fins 4 are formed by the solidification shrinkage after the resin filling. Is firmly held between the radiating fin locking portion 2a and the side locking portion 2c.

FIGS. 8B and 8C show various aspects of the heat dissipation component according to still another embodiment of the present invention. In the embodiment shown in FIG. 8B, the heat dissipating fin 4 is formed with a plurality of second recesses 7-1, 7-2, 7-3 that are parallel to each other.
In the embodiment shown in FIG. 8C, the heat dissipating fin 4 is formed with a pair of second recesses 7-4 and 7-5 that are parallel to each other.
The plurality of second recesses 7-1, 7-2, 7-3 of the radiating fin 4 shown in FIG. 8B and the second recess 7-4 of the radiating fin 4 shown in FIG. 7-5 is not filled with resin in particular, and serves as an air passage during forced air cooling.

FIGS. 9A, 9B, and 9C show various aspects of the heat dissipation component according to still another embodiment of the present invention. In the embodiment shown in FIG. 9A, the fin 5 a is integrally provided on the side of the heat radiating fin 4 in addition to the fin 5. In the mode shown in FIG. 9B, the heat dissipating fin 4 is formed with a trapezoidal second recess 7-6 in the main body 6. In the mode shown in FIG. 9C, the heat dissipating fin 4 is formed with a trapezoidal second recess 7-6 in the main body 6, and in addition to the fin 5, the fin 5 a is integrally provided on its side. . The second recesses 7-6 shown in FIGS. 9 (b) and 9 (c) are not filled with resin in particular, and serve as an air passage during forced air cooling.

DESCRIPTION OF SYMBOLS 4 ... Radiation fin, 1 ... Radiation component, 5 ... Fin, 7 ... 1st recessed part, 3 ... Metal component, 8a, 8b ... Opposite surface, 2 ... Resin holder.

Claims (9)

In an air-cooled heat dissipating part for a storage battery comprising a metal part, a resin holder for mounting the metal part, and a heat dissipating fin installed so as to be able to transfer heat from the metal part
The metal part has been subjected to a surface treatment for improving adhesion with the resin,
The heat radiating fin is provided with a first recess on the opposite side surface of the main body formed with a plurality of fins, and the resin holder is provided with a heat radiating fin locking portion that fits into the first recess,
An air-cooling heat dissipation component for a storage battery, wherein the metal component and the heat dissipation fin are in contact with each other . 2. The storage battery according to claim 1, wherein the first recess is provided with a portion where a shortest interval between opposing surfaces forming the first recess is larger than a width of an opening of the first recess . Air-cooled heat dissipation component. The air-cooling heat dissipating part for a storage battery according to claim 1 or 2, wherein a pair of heat dissipating fins are disposed symmetrically via the metal part. The side part latching part latched to the side part of the said radiation fin is integrally formed in the said resin holder, The said radiation fin is clamped between the said radiation fin latching part and the said side part latching part. The air-cooling heat dissipation component for storage batteries as described in any one of Claims 1-3. The air- cooling heat dissipation component for a storage battery according to any one of claims 1 to 4, wherein a second recess serving as an air passage is formed in the heat dissipation fin. The air-cooling heat dissipating part for a storage battery according to any one of claims 1 to 3, wherein the heat dissipating fins are formed by extrusion molding. The air-cooling heat dissipating part for a storage battery according to claim 6, wherein the heat dissipating fins formed by extrusion are provided with two or more fin rows, each having a plurality of fin rows parallel to each other. A step of placing a metal part in the mold, a step of filling a resin in the mold in which the metal part is placed, and a step of placing a radiation fin in contact with the metal part in the mold. The metal part is subjected to a surface treatment for improving the adhesion with the resin, and the heat dissipating fin is formed with a resin runner , and the mold is filled with the resin. A method for producing an air-cooled heat radiating component for a storage battery , wherein the resin runner of the heat radiating fin is filled with a resin. The resin flow path of the radiating fin is a first recess formed in the radiating fin, and the shortest distance between the opposing surfaces forming the first recess is smaller than the width of the opening of the first recess. The manufacturing method of the air-cooling heat radiating component for storage batteries of Claim 3 or Claim 4 with which a large site | part is provided.