JP2016192280A - Secondary battery cooling device - Google Patents
Secondary battery cooling device Download PDFInfo
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- JP2016192280A JP2016192280A JP2015070982A JP2015070982A JP2016192280A JP 2016192280 A JP2016192280 A JP 2016192280A JP 2015070982 A JP2015070982 A JP 2015070982A JP 2015070982 A JP2015070982 A JP 2015070982A JP 2016192280 A JP2016192280 A JP 2016192280A
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- 238000001816 cooling Methods 0.000 title claims abstract description 33
- 239000000758 substrate Substances 0.000 claims abstract description 51
- 230000017525 heat dissipation Effects 0.000 claims abstract description 10
- 239000012530 fluid Substances 0.000 claims description 80
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 238000002788 crimping Methods 0.000 description 7
- 239000012071 phase Substances 0.000 description 7
- 230000005855 radiation Effects 0.000 description 7
- 238000007789 sealing Methods 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
Description
この発明は二次電池用冷却装置に関する。 The present invention relates to a secondary battery cooling device.
この明細書および特許請求の範囲において、図３の上下を上下というものとする。 In this specification and claims, the top and bottom of FIG.
近年、環境問題などから、ハイブリッド自動車、電気自動車等が注目されており、そのために各種の二次電池が開発されている。各種の二次電池の中でもリチウムイオン二次電池は、エネルギー密度が高く、密閉性に優れ、かつメンテナンスフリーであるため、ハイブリッド自動車や電気自動車用のバッテリとして優れているが、大型のものは実用化されていない。そこで、複数個の小型の単電池を直列または並列に接続して組電池の形態とすることにより、所望の電圧や容量を確保している。 In recent years, hybrid vehicles, electric vehicles, and the like have attracted attention due to environmental problems, and various secondary batteries have been developed for this purpose. Among various types of secondary batteries, lithium ion secondary batteries have high energy density, excellent sealing properties, and are maintenance-free, so they are excellent as batteries for hybrid vehicles and electric vehicles. It has not been converted. Therefore, a desired voltage and capacity are secured by connecting a plurality of small cells in series or in parallel to form a battery pack.
リチウムイオン二次電池は、使用温度によって性能や寿命が変化するので、長時間にわたって効率良く使用するためには適正な温度で使用する必要があるが、上述したような組電池の形態で用いた場合、各単電池自体から発せられる熱を放熱することが困難であり、各単電池の温度が上昇して寿命が短くなるという問題がある。 Lithium ion secondary batteries vary in performance and life depending on the operating temperature, so it is necessary to use them at an appropriate temperature in order to use them efficiently over a long period of time. In this case, it is difficult to dissipate heat generated from each unit cell itself, and there is a problem that the temperature of each unit cell rises and the life is shortened.
そこで、上述したような組電池における単電池の温度上昇を抑制することを目的として、本出願人は、先に、鉛直状に配置される複数の扁平状単電池と、ヒートパイプ部が設けられた基板を有する複数の平板状ヒートパイプと、単電池および平板状ヒートパイプを収容する外装ケースと、外装ケースの上壁外面に取り付けられた冷却装置とを備えており、平板状ヒートパイプの基板が、単電池の少なくとも片面に熱的に接触させられた状態で単電池とともに積層状に配置される鉛直状受熱部と、受熱部に連なって単電池よりも上方に突出するように設けられかつ受熱部と直角をなす水平状放熱部とを有し、ヒートパイプ部が、中空状作動液封入部内に作動液が封入されることにより基板の受熱部から放熱部にかけて設けられ、基板の放熱部が外装ケースの上壁内面に沿わされた状態で固定され、冷却装置が、外装ケースの上壁外面に、複数の平板状ヒートパイプの基板の放熱部に跨るように取り付けられている組電池の冷却構造を提案した（特許文献１参照）。 Therefore, for the purpose of suppressing the temperature rise of the unit cell in the assembled battery as described above, the present applicant is first provided with a plurality of flat unit cells arranged in a vertical shape and a heat pipe portion. A flat plate heat pipe, a plurality of flat plate heat pipes, an outer case that accommodates the cells and the flat plate heat pipe, and a cooling device attached to the outer wall of the upper wall of the outer case. Is provided in such a manner that the vertical heat receiving portion is disposed in a stacked manner together with the single cells in a state of being in thermal contact with at least one surface of the single cells, and is protruded upward from the single cells in connection with the heat receiving portions. A horizontal heat radiating portion perpendicular to the heat receiving portion, and the heat pipe portion is provided from the heat receiving portion of the substrate to the heat radiating portion by sealing the working fluid in the hollow hydraulic fluid enclosing portion. But Cooling of a battery pack that is fixed along the inner wall of the upper wall of the packaging case, and the cooling device is mounted on the outer wall of the outer wall of the outer casing so as to straddle the heat radiation part of the substrate of the plurality of flat plate heat pipes A structure was proposed (see Patent Document 1).
しかしながら、特許文献１記載の組電池の冷却構造では、部品点数が多くなるとともに、組み立て作業が面倒になるという問題がある。
However, the assembled battery cooling structure described in
この発明の目的は、上記問題を解決し、部品点数を削減しうるとともに、組み立て作業が簡単になる二次電池用冷却装置を提供することにある。 An object of the present invention is to provide a secondary battery cooling device that can solve the above-described problems, reduce the number of parts, and simplify an assembling operation.
本発明は、上記目的を達成するために以下の態様からなる。 In order to achieve the above object, the present invention comprises the following aspects.
1)ヒートパイプ部が設けられかつ略Ｌ字状となされた基板を有する板状ヒートパイプと、板状ヒートパイプを支持する支持板とを備えており、
板状ヒートパイプの基板が、一端部が他端部に対して低くなるように水平面に対して傾斜しかつ二次電池が載せられる傾斜状受熱部と、受熱部の傾斜上端部に連なって上方にのびる放熱部とからなり、ヒートパイプ部が、中空状作動液封入部内に作動液が封入されることによって、基板の受熱部および放熱部にかけて設けられ、
支持板の上面が、板状ヒートパイプの基板の受熱部を載せる載置面となされ、支持板の載置面における基板の受熱部の傾斜下端部側に、受熱部に載せられた二次電池の受熱部に対する傾斜方向下方への移動を阻止するストッパが設けられている二次電池用冷却装置。
1) a plate-like heat pipe having a substrate provided with a heat pipe portion and having a substantially L-shape; and a support plate for supporting the plate-like heat pipe,
The plate-shaped heat pipe substrate is inclined with respect to the horizontal plane so that one end is lower than the other end, and is connected to the inclined upper end portion of the heat receiving portion. The heat pipe portion is provided over the heat receiving portion and the heat radiating portion of the substrate by enclosing the hydraulic fluid in the hollow hydraulic fluid enclosure portion,
The upper surface of the support plate is a mounting surface on which the heat receiving portion of the substrate of the plate heat pipe is placed, and the secondary battery is placed on the heat receiving portion on the inclined lower end side of the heat receiving portion of the substrate on the mounting surface of the support plate The cooling device for secondary batteries provided with the stopper which prevents the downward movement of the inclination direction with respect to the heat receiving part.
2)板状ヒートパイプの基板が互いに接合された２枚の金属板からなり、基板のヒートパイプ部の作動液封入部が、基板の少なくともいずれか一方の金属板を膨出させることにより形成され、支持板の載置面における基板の受熱部の両側部分に、受熱部上に載せられる二次電池を支持して作動液封入部の完全な潰れを防止する支持部が設けられ、受熱部の作動液封入部の上端が支持部の上端よりも上方に突出しており、受熱部の作動液封入部の上端と支持部の上端との高さの差が、作動液封入部の内部高さより小さくなっている上記1)記載の二次電池用冷却装置。 2) The plate-shaped heat pipe substrate is composed of two metal plates joined together, and the hydraulic fluid enclosing portion of the heat pipe portion of the substrate is formed by expanding at least one of the metal plates of the substrate. In addition, support portions for supporting the secondary battery placed on the heat receiving portion and preventing the complete collapse of the hydraulic fluid sealing portion are provided on both sides of the heat receiving portion of the substrate on the mounting surface of the support plate. The upper end of the hydraulic fluid enclosure protrudes upward from the upper end of the support, and the difference in height between the upper end of the hydraulic fluid enclosure and the upper end of the support is smaller than the internal height of the hydraulic fluid enclosure. The cooling device for a secondary battery as described in 1) above.
3)板状ヒートパイプの放熱部における受熱部とは反対側を向いた面および支持板の放熱部側端面に跨って放熱器が配置され、当該放熱器が、緊結具により放熱部および支持板に固定されている上記1)または2)記載の二次電池用冷却装置。 3) A radiator is disposed across the surface of the heat radiating part of the plate heat pipe facing away from the heat receiving part and the end face of the supporting plate on the side of the heat radiating part. The cooling device for a secondary battery as described in 1) or 2) above, which is fixed to the battery.
4)作動液封入部が、受熱部において上側に位置する金属板、および放熱部において受熱部側に位置する金属板のみを膨出させることにより形成されている上記3)記載の二次電池用冷却装置。 4) The secondary battery according to 3) above, wherein the hydraulic fluid enclosing portion is formed by expanding only the metal plate located on the upper side in the heat receiving portion and the metal plate located on the heat receiving portion side in the heat radiating portion. Cooling system.
5)板状ヒートパイプの基板の受熱部の水平面に対する傾斜角度が３〜１０度であり、放熱部が鉛直状である上記1)〜4)のうちのいずれかに記載の二次電池用冷却装置。 5) The cooling for a secondary battery according to any one of 1) to 4) above, wherein an inclination angle of the heat receiving portion of the plate-shaped heat pipe substrate with respect to the horizontal plane is 3 to 10 degrees, and the heat radiating portion is vertical. apparatus.
上記1)〜5)の二次電池用冷却装置によれば、冷却対象となる二次電池、たとえばリチウムイオン二次電池からなる小型の単電池を直列または並列に接続した組電池を、板状ヒートパイプの受熱部上に載せるだけで、以下に述べるように、当該二次電池を効率良く冷却することが可能になる。 According to the secondary battery cooling device of the above 1) to 5), a secondary battery to be cooled, for example, an assembled battery in which small cells made of lithium ion secondary batteries are connected in series or in parallel, has a plate shape. As described below, the secondary battery can be efficiently cooled only by placing it on the heat receiving portion of the heat pipe.
すなわち、二次電池から発せられる熱によって、板状ヒートパイプの基板の受熱部が加熱され、この熱がヒートパイプ部の受熱部の作動液封入部内の作動液に伝わって作動液が蒸発する。一方、放熱部においては、作動液封入部内の作動液から外部に熱が奪われ、放熱部の作動液封入部内の気相の作動液が凝縮し、作動液封入部内の圧力が低下する。そして、受熱部の作動液封入部で発生した気相作動液が、圧力が低下した放熱部の作動液封入部に流れるとともに、再凝縮した液相作動液が、受熱部の作動液封入部に流れるので、ヒートパイプ部において、気相作動液の流れと液相作動液の流れとが発生し、作動液の循環が起きる。したがって、板状ヒートパイプの基板の受熱部に載せられた二次電池の全体が均等に冷却される。 That is, the heat receiving part of the substrate of the plate-like heat pipe is heated by the heat generated from the secondary battery, and this heat is transmitted to the working liquid in the working liquid sealing part of the heat receiving part of the heat pipe part to evaporate the working liquid. On the other hand, in the heat dissipating part, heat is taken away from the working fluid in the working fluid enclosing part, the gas phase working fluid in the working fluid enclosing part of the heat dissipating part is condensed, and the pressure in the working fluid enclosing part is lowered. Then, the gas-phase hydraulic fluid generated in the hydraulic fluid enclosure of the heat receiving section flows into the hydraulic fluid enclosure of the heat radiating section where the pressure has decreased, and the recondensed liquid phase hydraulic fluid enters the hydraulic fluid enclosure of the heat receiving section. Since it flows, in the heat pipe part, the flow of the gas phase hydraulic fluid and the flow of the liquid phase hydraulic fluid are generated, and the circulation of the hydraulic fluid occurs. Therefore, the entire secondary battery placed on the heat receiving portion of the plate-like heat pipe substrate is cooled uniformly.
そして、１つの板状ヒートパイプを使用するだけであり、しかも板状ヒートパイプの基板の受熱部上に二次電池を配置するだけで二次電池を冷却することができるので、特許文献１記載の冷却構造に比較して、部品点数を削減しうるとともに、組み立て作業が簡単になる。
Since only one plate-like heat pipe is used and the secondary battery can be cooled only by placing the secondary battery on the heat receiving portion of the plate-like heat pipe substrate, it is described in
しかも、支持板に設けられたストッパによって、板状ヒートパイプの基板の受熱部に載せられた二次電池の受熱部に対する傾斜方向下方への移動を阻止することができる。 In addition, the stopper provided on the support plate can prevent the downward movement of the secondary battery placed on the heat receiving portion of the substrate of the plate heat pipe in the inclination direction.
上記2)の二次電池用冷却装置によれば、受熱部上に載せられた二次電池と、作動液封入部とを確実に接触させることができて、二次電池から受熱部の作動液封入部への熱伝導性が優れたものになる。しかも、受熱部の作動液封入部の完全な潰れを防止することができ、作動液の流動に支障を来すことはなくなる。 According to the secondary battery cooling device of 2) above, the secondary battery placed on the heat receiving part and the hydraulic fluid enclosing part can be reliably brought into contact with each other from the secondary battery. The thermal conductivity to the encapsulating part is excellent. In addition, it is possible to prevent the hydraulic fluid enclosing portion of the heat receiving portion from being completely crushed, and the hydraulic fluid flow is not hindered.
上記3)の二次電池用冷却装置によれば、放熱部に流れてきた気相の作動液からの放熱が放熱器を介して行われるので、放熱効率が向上する。しかも、放熱器が、緊結具を介して支持板の放熱部側端面に固定されているので、板状ヒートパイプの基板の放熱部にかかる重量負荷を低減することができる。 According to the secondary battery cooling device of 3) above, the heat radiation efficiency is improved because the heat radiation from the gas phase hydraulic fluid that has flowed to the heat radiation portion is performed via the heat radiator. And since the heat radiator is being fixed to the heat sink side end surface of a support plate via the binding tool, the weight load concerning the heat sink of the board | substrate of a plate-shaped heat pipe can be reduced.
上記4)の二次電池用冷却装置によれば、板状ヒートパイプの基板の放熱部と、放熱器との接触面積を増大させることができ、放熱器を介しての放熱効率が効果的に向上する。 According to the secondary battery cooling device of 4) above, it is possible to increase the contact area between the heat radiation part of the substrate of the plate heat pipe and the heat radiator, and the heat radiation efficiency through the heat radiator is effective. improves.
上記5)の二次電池用冷却装置によれば、受熱部と放熱部との間での作動液の循環が、スムーズに行われる。 According to the secondary battery cooling device of 5), the working fluid is smoothly circulated between the heat receiving portion and the heat radiating portion.
以下、この発明の実施形態を、図面を参照して説明する。なお、以下の説明において、図２の下側を前、これと反対側を後といい、図３の左右を左右というものとする。 Embodiments of the present invention will be described below with reference to the drawings. In the following description, the lower side of FIG. 2 is referred to as the front, the opposite side is referred to as the rear, and the left and right in FIG.
また、以下の説明において、「アルミニウム」という用語には、純アルミニウムの他にアルミニウム合金を含むものとする。 In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.
図１〜図３はこの発明による二次電池用冷却装置の全体構成を示し、図４は二次電池用冷却装置の要部の構成を示す。 1 to 3 show the overall configuration of the secondary battery cooling device according to the present invention, and FIG. 4 shows the configuration of the main part of the secondary battery cooling device.
図１〜図３において、二次電池用冷却装置(1)は、ヒートパイプ部(4)が設けられかつ略Ｌ字状に曲げられた基板(3)を有する板状ヒートパイプ(2)と、板状ヒートパイプ(2)を支持するアルミニウム製支持板(5)とを備えている。 1 to 3, the secondary battery cooling device (1) includes a plate-like heat pipe (2) having a substrate (3) provided with a heat pipe portion (4) and bent in a substantially L shape. And an aluminum support plate (5) for supporting the plate heat pipe (2).
板状ヒートパイプ(2)の基板(3)は互いに接合された２枚のアルミニウム板からなり、長手方向を左右方向に向けるとともに幅方向を前後方向に向けた状態で配置され、かつ左端部が右端部に対して低くなるように水平面に対して傾斜した傾斜状受熱部(6)と、受熱部(6)の右端部（傾斜上端部）に連なって上方にのびる鉛直状放熱部(7)とからなり、受熱部(6)上に、複数のリチウム二次電池の単電池からなる組電池(8)が載せられるようになっている。板状ヒートパイプ(2)の基板(3)の受熱部(6)の水平面に対する傾斜角度は３〜１０度であることが好ましい。 The substrate (3) of the plate-like heat pipe (2) is composed of two aluminum plates joined to each other, arranged with the longitudinal direction facing the left and right direction and the width direction facing the front and rear direction, and the left end portion being An inclined heat receiving part (6) inclined with respect to the horizontal plane so as to be lower than the right end part, and a vertical heat dissipating part (7) extending upward from the right end part (inclined upper end part) of the heat receiving part (6) The assembled battery (8) composed of a plurality of lithium secondary battery cells is placed on the heat receiving part (6). The inclination angle of the heat receiving part (6) of the substrate (3) of the plate heat pipe (2) with respect to the horizontal plane is preferably 3 to 10 degrees.
板状ヒートパイプ(2)の基板(3)のヒートパイプ部(4)は、基板(3)のいずれか一方のアルミニウム板を外側に膨出させることにより形成された１つの中空無端状作動液封入部(9)内に作動液が封入されたものであり、基板(3)の受熱部(6)の左端部から放熱部(7)の上端部にかけて設けられている。ここでは、作動液封入部(9)は、受熱部(6)の上面側および放熱部(7)の左側面側(受熱部(6)側)のみに膨出するように形成されており、受熱部(6)の下面および放熱部(7)の右側面は平坦面となっている。 The heat pipe portion (4) of the substrate (3) of the plate heat pipe (2) is one hollow endless hydraulic fluid formed by expanding one of the aluminum plates of the substrate (3) outward. The hydraulic fluid is sealed in the sealed portion (9), and is provided from the left end portion of the heat receiving portion (6) of the substrate (3) to the upper end portion of the heat radiating portion (7). Here, the hydraulic fluid enclosing portion (9) is formed so as to bulge only on the upper surface side of the heat receiving portion (6) and the left side surface of the heat radiating portion (7) (heat receiving portion (6) side), The lower surface of the heat receiving portion (6) and the right side surface of the heat radiating portion (7) are flat surfaces.
板状ヒートパイプ(2)の基板(3)は、たとえば２枚のアルミニウム板の合わせ面のうちの少なくともいずれか一方の面に圧着防止剤を所要パターンに印刷し、この状態で２枚のアルミニウム板を圧着して合わせ板をつくり、合わせ板の非圧着部に流体圧を導入することによって作動液封入部(9)を一挙に形成する、所謂ロールボンド法によって製造された平板がＬ字状に曲げられることにより形成される。合せ板の非圧着部は、作動液封入部(9)に対応する形状の作動液封入部(9)用非圧着部と、作動液封入部(9)用非圧着部から合せ板の周縁に至る流体圧導入用非圧着部とからなる。流体圧導入用非圧着部から流体圧を導入して作動液封入部(9)を形成すると、流体圧導入用非圧着部は、一端が作動液封入部(9)に連なるとともに他端が合せ板の周縁に開口した作動液注入部となる。作動液注入部は作動液の注入後封止される。 The substrate (3) of the plate-like heat pipe (2) is printed with, for example, an anti-bonding agent on a required pattern on at least one of the two aluminum plate mating surfaces. A flat plate manufactured by the so-called roll bonding method is formed in an L shape by forming a laminated plate by crimping the plate, and forming the hydraulic fluid enclosing portion (9) at a stroke by introducing fluid pressure to the non-crimped portion of the laminated plate It is formed by being bent. The non-crimping part of the laminating plate is connected to the periphery of the laminating plate from the non-crimping part for the hydraulic fluid enclosing part (9) and the non-crimping part for the hydraulic fluid enclosing part (9) corresponding to the hydraulic fluid enclosing part (9). And a non-crimping part for introducing fluid pressure. When fluid pressure is introduced from the non-crimping part for introducing fluid pressure to form the hydraulic fluid enclosing part (9), one end of the non-crimping part for introducing fluid pressure is connected to the hydraulic fluid enclosing part (9) and the other end is aligned. It becomes the hydraulic fluid injection | pouring part opened to the peripheral edge of the board. The hydraulic fluid injection part is sealed after the hydraulic fluid is injected.
なお、基板(3)は、２枚のアルミニウム板を用意し、少なくともいずれか１枚のアルミニウム板に作動液封入部(9)を形成するための外方膨出部を形成し、当該２枚のアルミニウム板を、たとえばろう付したり、溶接したりすることにより形成してもよい。 The substrate (3) is provided with two aluminum plates, and at least one of the two aluminum plates is formed with an outward bulging portion for forming the hydraulic fluid enclosing portion (9). The aluminum plate may be formed by, for example, brazing or welding.
支持板(5)の上面は、板状ヒートパイプ(2)の基板(3)の受熱部(6)を載置する載置面(11)となっている。載置面(11)は、受熱部(6)と同様に、左端部が右端部に対して低くなるように水平面に対して傾斜している。支持板(5)の載置面(11)の前後両側縁部に、それぞれ左右方向にのびかつ受熱部(6)上に載せられる組電池(8)を支持して作動液封入部(9)の完全な潰れを防止する支持部(12)が上方突出状に一体に設けられている。前後両支持部(12)の載置面(11)に対する突出高さは相互に等しく、かつそれぞれ全長にわたって等しくなっている。図４(a)に示すように、板状ヒートパイプ(2)の基板(3)の受熱部(6)を支持板(5)の載置面(11)上に載せた状態では、受熱部(6)の作動液封入部(9)の上端は支持部(12)の上端よりも上方に突出しており、受熱部(6)の作動液封入部(9)の上端と支持部(12)の上端との高さの差は、作動液封入部(9)の内部高さより小さくなっている。 The upper surface of the support plate (5) is a placement surface (11) on which the heat receiving portion (6) of the substrate (3) of the plate-like heat pipe (2) is placed. Similar to the heat receiving portion (6), the placement surface (11) is inclined with respect to the horizontal plane so that the left end portion is lower than the right end portion. The hydraulic fluid enclosure (9) supports the assembled battery (8) that extends in the left-right direction on both sides of the mounting surface (11) of the support plate (5) and is placed on the heat receiving part (6). A support part (12) for preventing the complete crushing is integrally provided so as to protrude upward. The protrusion heights of the front and rear support portions (12) with respect to the placement surface (11) are equal to each other and are equal over the entire length. As shown in FIG. 4 (a), when the heat receiving portion (6) of the substrate (3) of the plate heat pipe (2) is placed on the mounting surface (11) of the support plate (5), the heat receiving portion. The upper end of the hydraulic fluid enclosure part (9) of (6) protrudes upward from the upper end of the support part (12), and the upper end of the hydraulic fluid enclosure part (9) of the heat receiving part (6) and the support part (12) The difference in height from the upper end of the hydraulic fluid is smaller than the internal height of the hydraulic fluid enclosure (9).
支持板(5)の載置面(11)の左端部側（板状ヒートパイプ(2)の基板(3)の受熱部(6)の傾斜下端部側）でかつ前後両支持部(12)の左端部側に、受熱部(6)に載せられた組電池(8)の受熱部(6)に対する傾斜方向下方への移動を阻止するストッパ(13)が、支持部(12)に対して上方に突出するように載置面(11)および支持部(12)と一体に設けられている。 On the left end side of the mounting surface (11) of the support plate (5) (the inclined lower end side of the heat receiving portion (6) of the substrate (3) of the plate heat pipe (2)) and both the front and rear support portions (12) A stopper (13) that prevents the assembled battery (8) mounted on the heat receiving part (6) from moving downward in the inclination direction with respect to the heat receiving part (6) is provided on the left end side of the support part (12). The mounting surface (11) and the support portion (12) are integrally provided so as to protrude upward.
板状ヒートパイプ(2)の基板(3)は、受熱部(6)が支持板(5)の載置面(11)における前後両支持部(12)間の部分に載せられ、受熱部(6)における作動液封入部(9)が設けられていない部分を貫通したおねじ(23)を支持板(5)の載置面(11)に形成されたねじ穴(24)にねじ嵌めることによって支持板(5)に固定されている。 The substrate (3) of the plate heat pipe (2) is placed on the portion between the front and rear support portions (12) on the mounting surface (11) of the support plate (5), and the heat reception portion (6). Screw the male screw (23) that penetrates the part where the hydraulic fluid enclosing part (9) is not provided in 6) into the screw hole (24) formed in the mounting surface (11) of the support plate (5). It is being fixed to the support plate (5) by.
板状ヒートパイプ(2)の基板(3)の放熱部(7)の右側面（受熱部(6)とは反対側を向いた面）および支持板(5)の右端面（放熱部(7)側端面）に跨ってアルミニウム製放熱器(14)が配置されている。放熱器(14)は、放熱部(7)の右側面に熱伝導性グリスや熱伝導シートを介して配置された鉛直状の放熱基板(15)と、放熱基板(15)の右側面に前後方向に間隔をおいて右方突出状に一体に形成され、かつ上下方向にのびる複数の放熱フィン(16)とからなる。板状ヒートパイプ(2)の基板(3)の放熱部(7)の左側面にはアルミニウム製固定板(17)が配置されており、固定板(17)、板状ヒートパイプ(2)の基板(3)の放熱部(7)における作動液封入部(9)が設けられていない部分および放熱器(14)の放熱基板(15)を貫通したボルト(18)の先端部にナット(19)をねじ嵌めるとともに、放熱器(14)の放熱基板(15)を貫通したおねじ(21)の先端部を支持板(5)の右端面に形成されたねじ穴(22)にねじ嵌めることによって、放熱器(14)が板状ヒートパイプ(2)および支持板(5)に固定されている。 The right side of the heat dissipation part (7) of the board (3) of the plate heat pipe (2) (the side facing away from the heat receiving part (6)) and the right end surface of the support plate (5) (heat dissipation part (7 An aluminum radiator (14) is disposed across the () side end face). The heatsink (14) has a vertical heatsink (15) arranged on the right side of the heatsink (7) via heat conductive grease and a heat conductive sheet, and front and back on the right side of the heatsink (15). A plurality of heat dissipating fins (16) which are integrally formed to protrude rightward at intervals in the direction and extend in the vertical direction. An aluminum fixing plate (17) is arranged on the left side surface of the heat radiating part (7) of the substrate (3) of the plate heat pipe (2), and the fixing plate (17) and the plate heat pipe (2) The nut (19) is attached to the tip of the bolt (18) that penetrates the heat dissipation board (15) of the radiator (14) and the part where the hydraulic fluid sealing part (9) is not provided in the heat dissipation part (7) of the board (3). ) And screw the end of the male screw (21) that penetrates the heat dissipation board (15) of the radiator (14) into the screw hole (22) formed on the right end surface of the support plate (5). Thus, the radiator (14) is fixed to the plate-like heat pipe (2) and the support plate (5).
上述した二次電池用冷却装置(1)において、組電池(8)は、板状ヒートパイプ(2)の基板(3)の受熱部(6)上に載せられ、図示しない結束具により受熱部(6)および支持板(5)に固定される。なお、受熱部(6)と組電池(8)との間は、電気絶縁コーティングや電気絶縁フィルムにより電気絶縁状態とされることが好ましい。このとき、図４(b)に示すように、作動液封入部(9)が若干変形するが、受熱部(6)の作動液封入部(9)の上端と支持部(12)の上端との高さの差が、作動液封入部(9)の内部高さより小さくなっているので、作動液封入部(9)の完全な潰れが防止され、作動液の流動に支障を来すことはない。 In the secondary battery cooling device (1) described above, the assembled battery (8) is placed on the heat receiving part (6) of the substrate (3) of the plate heat pipe (2), and is received by a binding tool (not shown). (6) and the support plate (5). The heat receiving portion (6) and the assembled battery (8) are preferably electrically insulated by an electrical insulation coating or an electrical insulation film. At this time, as shown in FIG. 4 (b), the hydraulic fluid enclosing portion (9) is slightly deformed, but the upper end of the hydraulic fluid enclosing portion (9) of the heat receiving portion (6) and the upper end of the support portion (12) Is less than the internal height of the hydraulic fluid enclosure (9), preventing the hydraulic fluid enclosure (9) from being completely crushed and hindering the flow of hydraulic fluid. Absent.
組電池(8)から熱が発せられると、当該熱によって、板状ヒートパイプ(2)の基板(3)の受熱部(6)が加熱され、この熱がヒートパイプ部(4)における受熱部(6)(7)の作動液封入部(9)内の作動液に伝わって作動液が蒸発する。一方、放熱部(7)においては、放熱器(14)によって板状ヒートパイプ(2)の基板(3)の放熱部(7)から熱が奪われ、放熱部(7)において作動液封入部(9)内の気相の作動液が凝縮し、作動液封入部(9)内の圧力が低下する。そして、受熱部(6)の作動液封入部(9)で発生した気相作動液が、圧力が低下した放熱部(7)の作動液封入部(9)に流れるとともに、再凝縮した液相作動液が、重力により受熱部(6)の作動液封入部(9)に流れるので、ヒートパイプ部(4)において、気相作動液の流れと液相作動液の流れが発生し、作動液の循環がおきる。したがって、組電池(8)における板状ヒートパイプ(2)の基板(3)の受熱部(6)に熱的に接触している部分の全体が均等に冷却される。 When heat is generated from the assembled battery (8), the heat receiving part (6) of the substrate (3) of the plate heat pipe (2) is heated by the heat, and this heat is received by the heat receiving part in the heat pipe part (4). (6) The hydraulic fluid evaporates by being transmitted to the hydraulic fluid in the hydraulic fluid enclosure (9) of (7). On the other hand, in the heat dissipating part (7), heat is taken away from the heat dissipating part (7) of the substrate (3) of the plate heat pipe (2) by the heat dissipator (14), and the hydraulic fluid enclosing part in the heat dissipating part (7). The gas phase hydraulic fluid in (9) condenses and the pressure in the hydraulic fluid enclosure (9) decreases. Then, the gas phase hydraulic fluid generated in the hydraulic fluid enclosing portion (9) of the heat receiving portion (6) flows into the hydraulic fluid enclosing portion (9) of the heat radiating portion (7) whose pressure has decreased, and the recondensed liquid phase Since the hydraulic fluid flows into the hydraulic fluid enclosing portion (9) of the heat receiving portion (6) by gravity, a flow of the gas phase hydraulic fluid and a liquid phase hydraulic fluid are generated in the heat pipe portion (4), and the hydraulic fluid The circulation of. Therefore, the entire portion of the plate-like heat pipe (2) in the assembled battery (8) that is in thermal contact with the heat receiving portion (6) of the substrate (3) is uniformly cooled.
この発明による二次電池用冷却装置(1)は、たとえば複数のＬｉ二次電池からなる組電池(8)を備えたハイブリッドカーに好適に用いられる。 The secondary battery cooling device (1) according to the present invention is suitably used for a hybrid car including an assembled battery (8) composed of a plurality of Li secondary batteries, for example.
(1)：二次電池用冷却装置
(2)：板状ヒートパイプ
(3)：基板
(4)：ヒートパイプ部
(5)：支持板
(6)：受熱部
(7)：放熱部
(8)：組電池
(9)：作動液封入部
(11)：載置面
(12)：支持部
(13)：ストッパ
(14)：放熱器
(1): Cooling device for secondary battery
(2): Plate heat pipe
(3): Board
(4): Heat pipe section
(5): Support plate
(6): Heat receiving part
(7): Heat radiation part
(8): Battery pack
(9): Hydraulic fluid enclosure
(11): Placement surface
(12): Support part
(13): Stopper
(14): Heatsink
Claims (5)
板状ヒートパイプの基板が、一端部が他端部に対して低くなるように水平面に対して傾斜しかつ二次電池が載せられる傾斜状受熱部と、受熱部の傾斜上端部に連なって上方にのびる放熱部とからなり、ヒートパイプ部が、中空状作動液封入部内に作動液が封入されることによって、基板の受熱部および放熱部にかけて設けられ、
支持板の上面が、板状ヒートパイプの基板の受熱部を載せる載置面となされ、支持板の載置面における基板の受熱部の傾斜下端部側に、受熱部に載せられた二次電池の受熱部に対する傾斜方向下方への移動を阻止するストッパが設けられている二次電池用冷却装置。 A plate-like heat pipe provided with a heat pipe part and having a substantially L-shaped substrate, and a support plate for supporting the plate-like heat pipe,
The plate-shaped heat pipe substrate is inclined with respect to the horizontal plane so that one end is lower than the other end, and is connected to the inclined upper end portion of the heat receiving portion. The heat pipe portion is provided over the heat receiving portion and the heat radiating portion of the substrate by enclosing the hydraulic fluid in the hollow hydraulic fluid enclosure portion,
The upper surface of the support plate is a mounting surface on which the heat receiving portion of the substrate of the plate heat pipe is placed, and the secondary battery is placed on the heat receiving portion on the inclined lower end side of the heat receiving portion of the substrate on the mounting surface of the support plate The cooling device for secondary batteries provided with the stopper which prevents the downward movement of the inclination direction with respect to the heat receiving part.
The cooling device for a secondary battery according to any one of claims 1 to 4, wherein an inclination angle of the heat receiving portion of the substrate of the plate heat pipe with respect to a horizontal plane is 3 to 10 degrees, and the heat radiating portion is vertical.
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| JP7215834B2 (en) | 2018-04-11 | 2023-01-31 | 昭和電工株式会社 | Battery temperature controller |
| JP2020019291A (en) * | 2018-07-30 | 2020-02-06 | アイシン軽金属株式会社 | Battery housing structure |
| JP2022539404A (en) * | 2020-03-04 | 2022-09-08 | エルジー エナジー ソリューション リミテッド | BATTERY RACK AND POWER STORAGE DEVICE INCLUDING THE SAME |
| JP7214019B2 (en) | 2020-03-04 | 2023-01-27 | エルジー エナジー ソリューション リミテッド | BATTERY RACK AND POWER STORAGE DEVICE INCLUDING THE SAME |
| CN112074150A (en) * | 2020-08-20 | 2020-12-11 | 航天科工空间工程发展有限公司 | Heat dissipation device and electronic equipment with same |
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| Publication number | Publication date |
|---|---|
| JP6412456B2 (en) | 2018-10-24 |
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