JP5943457B2 - Battery unit - Google Patents

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JP5943457B2
JP5943457B2 JP2011216900A JP2011216900A JP5943457B2 JP 5943457 B2 JP5943457 B2 JP 5943457B2 JP 2011216900 A JP2011216900 A JP 2011216900A JP 2011216900 A JP2011216900 A JP 2011216900A JP 5943457 B2 JP5943457 B2 JP 5943457B2
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circuit board
housing
battery
battery unit
surface side
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JP2013077455A (en
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達也 長井
達也 長井
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FDK Corp
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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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  • Battery Mounting, Suspending (AREA)

Description

本発明は、電池と回路基板とを備える電池ユニットに関する。   The present invention relates to a battery unit including a battery and a circuit board.

例えばブレードサーバのバックアップ電源として用いられる電池ユニットは、複数の電池を組み合わせて高電圧・大電流放電を実現する電池パックと、その電池の充放電制御回路等を実装した回路基板とを備える。このような用途の電池ユニットは、省スペースのために小型化を実現する上で、複数の電池を直列又は並列に組加工した電池パックが回路基板とともに、ほとんど隙間がない状態で筐体の限られた空間に実装される場合が多い（例えば特許文献１を参照）。このような電池ユニットにおいては、電池パック及び回路基板が筐体の中に高密度で実装されているため、電池パックの各電池から発せられる熱による温度上昇が問題となることがある。   For example, a battery unit used as a backup power source of a blade server includes a battery pack that combines a plurality of batteries to realize high voltage and large current discharge, and a circuit board on which a charge / discharge control circuit for the battery is mounted. In order to reduce the size of the battery unit in order to save space, the battery pack formed by assembling a plurality of batteries in series or in parallel with the circuit board together with the circuit board has almost no gap. In many cases, it is mounted in a specified space (see, for example, Patent Document 1). In such a battery unit, since the battery pack and the circuit board are mounted in the casing at a high density, a temperature rise due to heat generated from each battery of the battery pack may be a problem.

上記の問題を解決する方法としては、大別すると二通りのアプローチが考えられる。一つは、電池ユニットの筐体の内部空間の熱を外部へ効率的に放熱することによって電池ユニットの温度上昇を抑制することである。そのような従来技術としては、筐体内部の空気を強制的に外部へ排出する冷却ファンを設けた電池ユニットが公知である（例えば特許文献１を参照）。   Broadly speaking, there are two approaches for solving the above problems. One is to suppress the temperature rise of the battery unit by efficiently radiating the heat of the internal space of the battery unit housing to the outside. As such a conventional technique, a battery unit provided with a cooling fan for forcibly discharging the air inside the housing to the outside is known (see, for example, Patent Document 1).

もう一つは、電池の放熱性を高めることによって電池ユニットの温度上昇を抑制することである。電池の放熱性を高める従来技術としては、例えば、シリコーン系フィルムや熱導電性粒子を配合したゴムシートで電池ケースを被覆した二次電池が公知である（例えば特許文献２を参照）。また例えば、ガラス質の材料を主成分とし、結晶質の材料を副成分とするセラミックス層を外表面に形成した二次電池が公知である（例えば特許文献３を参照）。また例えば、セラミックやグラファイト等を材料とする熱放射層、銅やアルミを材料とする熱伝導層を含む多層構造のシートで表面を被覆した電池セルが公知である（例えば特許文献４を参照）。   The other is to suppress the temperature rise of the battery unit by increasing the heat dissipation of the battery. As a conventional technique for improving the heat dissipation of a battery, for example, a secondary battery in which a battery case is covered with a rubber sheet blended with a silicone film or thermally conductive particles is known (see, for example, Patent Document 2). Further, for example, a secondary battery is known in which a ceramic layer having a glassy material as a main component and a crystalline material as a subcomponent is formed on the outer surface (see, for example, Patent Document 3). Further, for example, a battery cell whose surface is covered with a sheet having a multilayer structure including a heat radiation layer made of ceramic, graphite, or the like, and a heat conductive layer made of copper or aluminum is known (see, for example, Patent Document 4). .

特開２０１０−８８２１１号公報JP 2010-88211 A 特開２０００−２８５８７３号公報JP 2000-285873 A 特開２００３−３０８８７２号公報JP 2003-30872 A 特開２００９−２９５３８１号公報JP 2009-295381 A

しかしながら電池自身の放熱性を向上させても、その電池から放熱された熱を筐体の内部から外部へ効率的に放熱することができなければ、電池ユニットの温度上昇を充分に抑制できない可能性がある。特に筐体の内壁面と回路基板との間の空間は、その構造上、冷却ファンによる空気の流れが回路基板に遮られてしまうことが多く、空気が滞留して熱がこもりやすいため、電池ユニットの放熱効率を高める上でネックとなる。また例えば大型で強力な冷却ファンを設ければ、電池ユニットの冷却効率を高めることが可能である。しかし省スペースのために電池ユニットの小型化を実現する上では、大型で強力な冷却ファンを設けることが困難な場合も少なくない。   However, even if the heat dissipation of the battery itself is improved, if the heat dissipated from the battery cannot be efficiently dissipated from the inside of the housing to the outside, the temperature rise of the battery unit may not be sufficiently suppressed There is. In particular, the space between the inner wall surface of the housing and the circuit board is often blocked by the circuit board due to the structure of the air flow due to the cooling fan. It becomes a bottleneck in improving the heat dissipation efficiency of the unit. For example, if a large and powerful cooling fan is provided, the cooling efficiency of the battery unit can be increased. However, in order to reduce the size of the battery unit in order to save space, it is often difficult to provide a large and powerful cooling fan.

このような状況に鑑み本発明はなされたものであり、その目的は、より放熱効率の高い電池ユニットを提供することにある。   The present invention has been made in view of such circumstances, and an object thereof is to provide a battery unit with higher heat dissipation efficiency.

＜本発明の第１の態様＞
本発明の第１の態様は、吸入口及び排出口が設けられた筐体と、前記吸入口から前記排出口への空気の流れを前記筐体の内部に形成する送風装置と、前記筐体の内部に設けられた電池と、前記吸入口から前記排出口への空気の流れに沿うように前記筐体の内部に設けられ、一面側が前記電池と対面し他面側が前記筐体の内壁面と対面する回路基板と、を備え、前記回路基板は、前記送風装置により前記回路基板の一面側に流れる空気の一部を前記回路基板の他面側へ導く分流路が形成されている、ことを特徴とする電池ユニットである。 <First Aspect of the Present Invention>
According to a first aspect of the present invention, there is provided a housing provided with a suction port and a discharge port, a blower that forms an air flow from the suction port to the discharge port in the housing, and the housing A battery provided inside the housing, and provided in the housing so as to follow the flow of air from the suction port to the discharge port, with one surface facing the battery and the other surface on the inner wall surface of the housing A circuit board that faces the circuit board, wherein the circuit board is formed with a diversion channel that guides a part of the air flowing to one surface side of the circuit board to the other surface side of the circuit board by the blower. It is a battery unit characterized by these.

このような特徴によれば、従来は空気が滞留して熱がこもりやすかった回路基板の他面側と筐体の内壁面との間の空間に、送風装置による空気の流れを形成することができる。それによって回路基板の他面側と筐体の内壁面との間の空間に熱がこもる虞を低減することができるので、筐体の内部空間の冷却効率を高めることができる。   According to such a feature, it is possible to form an air flow by the blower in the space between the other side of the circuit board and the inner wall surface of the housing, where air has stayed and heat has been easily trapped. it can. This can reduce the possibility of heat being accumulated in the space between the other surface side of the circuit board and the inner wall surface of the housing, so that the cooling efficiency of the internal space of the housing can be increased.

これにより本発明の第１の態様によれば、より放熱効率の高い電池ユニットを提供することができるという作用効果が得られる。   Thereby, according to the 1st aspect of this invention, the effect that a battery unit with higher heat dissipation efficiency can be provided is acquired.

＜本発明の第２の態様＞
本発明の第２の態様は、前述した本発明の第１の態様において、前記回路基板は、前記吸入口から前記排出口への空気の流れの上流側の端部に前記分流路が形成されている、ことを特徴とする電池ユニットである。 <Second Aspect of the Present Invention>
According to a second aspect of the present invention, in the first aspect of the present invention described above, the circuit board has the branch channel formed at an upstream end of an air flow from the suction port to the discharge port. It is the battery unit characterized by the above.

このような特徴によれば、回路基板の他面側と筐体の内壁面との間の空間には、少なくとも回路基板の上流側端部から送風装置による空気の流れが形成される。それによって回路基板の他面側と筐体の内壁面との間の空間に熱がこもる虞をさらに低減することができるので、筐体の内部空間の冷却効率をさらに高めることができる。   According to such a feature, in the space between the other surface side of the circuit board and the inner wall surface of the housing, an air flow by the blower is formed at least from the upstream end of the circuit board. This can further reduce the possibility of heat being accumulated in the space between the other surface side of the circuit board and the inner wall surface of the housing, so that the cooling efficiency of the internal space of the housing can be further increased.

＜本発明の第３の態様＞
本発明の第３の態様は、前述した本発明の第１の態様又は第２の態様において、前記回路基板は、前記回路基板の他面側に流れる空気を前記回路基板の一面側へ導く合流路が形成されている、ことを特徴とする電池ユニットである。 <Third Aspect of the Present Invention>
According to a third aspect of the present invention, in the first aspect or the second aspect of the present invention described above, the circuit board joins air flowing on the other surface side of the circuit board to one surface side of the circuit board. The battery unit is characterized in that a path is formed.

このような特徴によれば、回路基板の他面側に流れる空気が合流路を通じて回路基板の一面側へ導かれ、排出口から外部へ排出されることになる。つまり回路基板の他面側から筐体の排出口への空気の流路を形成することによって、回路基板の他面側に空気を流れやすくすることができる。それによって回路基板の他面側と筐体の内壁面との間の空間に熱がこもる虞をさらに低減することができるので、筐体の内部空間の冷却効率をさらに高めることができる。   According to such a feature, the air flowing to the other surface side of the circuit board is guided to one surface side of the circuit board through the combined flow path and is discharged to the outside from the discharge port. That is, by forming a flow path of air from the other surface side of the circuit board to the discharge port of the housing, it is possible to make air easily flow to the other surface side of the circuit board. This can further reduce the possibility of heat being accumulated in the space between the other surface side of the circuit board and the inner wall surface of the housing, so that the cooling efficiency of the internal space of the housing can be further increased.

＜本発明の第４の態様＞
本発明の第４の態様は、前述した本発明の第３の態様において、前記回路基板は、前記吸入口から前記排出口への空気の流れの下流側の端部に前記合流路が形成されている、ことを特徴とする電池ユニットである。 <Fourth aspect of the present invention>
According to a fourth aspect of the present invention, in the third aspect of the present invention described above, the circuit board has the joint channel formed at the downstream end of the air flow from the suction port to the discharge port. It is the battery unit characterized by the above.

このような特徴によれば、回路基板の他面側と筐体の内壁面との間の空間には、少なくとも回路基板の下流側端部まで送風装置による空気の流れが形成される。それによって回路基板の他面側と筐体の内壁面との間の空間に熱がこもる虞をさらに低減することができるので、筐体の内部空間の冷却効率をさらに高めることができる。   According to such a feature, in the space between the other surface side of the circuit board and the inner wall surface of the housing, an air flow by the blower is formed at least to the downstream end of the circuit board. This can further reduce the possibility of heat being accumulated in the space between the other surface side of the circuit board and the inner wall surface of the housing, so that the cooling efficiency of the internal space of the housing can be further increased.

本発明によれば、より放熱効率の高い電池ユニットを提供することができるという作用効果が得られる。   According to the present invention, it is possible to provide an effect that a battery unit with higher heat dissipation efficiency can be provided.

本発明に係る電池ユニットの外観斜視図。The external appearance perspective view of the battery unit which concerns on this invention. 本発明に係る電池ユニットの分解斜視図。The disassembled perspective view of the battery unit which concerns on this invention. 回路基板の平面図。The top view of a circuit board. 図１のI−I断面を図示した電池ユニットの断面図。Sectional drawing of the battery unit which illustrated the II cross section of FIG. 図１のII−II断面を図示した電池ユニットの断面図。Sectional drawing of the battery unit which illustrated the II-II cross section of FIG.

以下、本発明の実施の形態について、図１〜図５を参照しながら説明する。
図１は、本発明に係る電池ユニット１０の外観斜視図である。図２は、本発明に係る電池ユニット１０の分解斜視図である。図３は、回路基板４の平面図である。図４は、本発明に係る電池ユニット１０の断面図であり、図１のI−I断面を図示したものである。図５は、本発明に係る電池ユニット１０の断面図であり、図１のII−II断面を図示したものである。 Hereinafter, embodiments of the present invention will be described with reference to FIGS.
FIG. 1 is an external perspective view of a battery unit 10 according to the present invention. FIG. 2 is an exploded perspective view of the battery unit 10 according to the present invention. FIG. 3 is a plan view of the circuit board 4. FIG. 4 is a cross-sectional view of the battery unit 10 according to the present invention, and illustrates the II cross section of FIG. FIG. 5 is a cross-sectional view of the battery unit 10 according to the present invention, and illustrates the II-II cross section of FIG.

電池ユニット１０は、いわゆるサーバー装置（ネットワークにおいてクライアント装置に機能やデーター等を提供するコンピューター）の非常用電源であり、筐体カバー１、筐体本体２、電池３、回路基板４、基板ホルダー５、冷却ファン６〜８及びＤＣ−ＤＣコンバーター９を備える。   The battery unit 10 is an emergency power source for a so-called server device (a computer that provides functions and data to client devices in a network), and includes a housing cover 1, a housing body 2, a battery 3, a circuit board 4, and a board holder 5. The cooling fans 6 to 8 and the DC-DC converter 9 are provided.

「筐体」としての筐体カバー１は、略コ字形状の断面を有する長尺な金属部材である。筐体カバー１の長手端の一方には、段差を有するように曲げ加工をして形成された段差部１７が設けられており、その段差部１７には、四つの円形貫通孔１１が形成されている。また筐体カバー１の短手端の一方には、段差を有するように曲げ加工をして形成された段差部１８が設けられており、その段差部１８には雌ネジ孔１２が形成されている。さらに筐体カバー１には、二つの円形貫通孔１３、四つの円形貫通孔１４が各々所定位置に形成されている。   The housing cover 1 as a “housing” is a long metal member having a substantially U-shaped cross section. One of the longitudinal ends of the housing cover 1 is provided with a step portion 17 formed by bending so as to have a step, and four circular through holes 11 are formed in the step portion 17. ing. Further, a stepped portion 18 formed by bending so as to have a step is provided on one of the short ends of the housing cover 1, and a female screw hole 12 is formed in the stepped portion 18. Yes. Furthermore, the housing cover 1 is formed with two circular through holes 13 and four circular through holes 14 at predetermined positions.

「筐体」としての筐体本体２は、筐体カバー１が装着される部分が開口している略箱形状の金属部材である。筐体本体２の側端部２７には、筐体カバー１に形成された四つの円形貫通孔１１に対応する位置に四つの円形貫通孔２１が形成されている。また筐体本体２には、筐体カバー１の二つの円形貫通孔１３に対応する位置に二つの雌ネジ孔２３が形成されている。さらに筐体本体２には、筐体カバー１の四つの円形貫通孔１４に対応する位置に四つの雌ネジ孔２４が形成されている。さらに筐体本体２には、内部を空冷する空気の流れの入口となる吸入口２８、及びその出口となる二つの排出口２９、３０が形成されている。   The housing body 2 as a “housing” is a substantially box-shaped metal member having an opening at a portion where the housing cover 1 is mounted. Four circular through holes 21 are formed at positions corresponding to the four circular through holes 11 formed in the housing cover 1 at the side end portion 27 of the housing body 2. The housing body 2 is formed with two female screw holes 23 at positions corresponding to the two circular through holes 13 of the housing cover 1. Further, four female screw holes 24 are formed in the housing body 2 at positions corresponding to the four circular through holes 14 of the housing cover 1. Further, the housing body 2 is formed with a suction port 28 that serves as an inlet for an air flow for air-cooling the interior, and two discharge ports 29 and 30 that serve as outlets.

複数の電池３は、いわゆるニッケル−水素二次電池であり、筐体本体２の内部に設けられている。単体の電池３は、φ１８ｍｍ×Ｌ６７ｍｍの大きさであり、その出力電圧は約１．２Ｖである。電池ユニット１０は、３×３×６＝５４個の電池３が内部に設けられており、幅方向へ３個×長さ方向へ６個＝１８個の電池３が直列接続された電池ブロックが三つ構成され、それらが並列接続されている。したがって５４個の電池３の総出力電圧は、１．２Ｖ×１８個＝約２１．６Ｖということになる。
尚、本発明において、電池３の種類、大きさ、個数等が特に上記に限定されないのは言うまでもないことである。 The plurality of batteries 3 are so-called nickel-hydrogen secondary batteries, and are provided inside the housing body 2. The single battery 3 has a size of φ18 mm × L67 mm, and its output voltage is about 1.2V. The battery unit 10 includes 3 × 3 × 6 = 54 batteries 3 inside, and a battery block in which 3 batteries in the width direction × 6 batteries in the length direction = 18 batteries 3 are connected in series. Three are configured and they are connected in parallel. Therefore, the total output voltage of 54 batteries 3 is 1.2 V × 18 = about 21.6 V.
In the present invention, it goes without saying that the type, size, number, etc. of the battery 3 are not particularly limited to the above.

回路基板４は、電池３の充放電制御回路等が実装されており、複数の電池３からなる電池群の上面側に隣接する位置に配設されている。より具体的には回路基板４は、吸入口２８から２つの排出口２９、３０への空気の流れ方向（符号Ａで示した方向）に沿うように筐体本体２の内部に設けられ、一面側が電池３と対面し他面側が筐体カバー１の内壁面と対面している。回路基板４の長手端４２には、略矩形の同一形状の切り欠き４１が四つずつ間隔をもってそれぞれ形成されている。また回路基板４は、吸入口２８から２つの排出口２９、３０への空気の流れの上流側（以下、単に「上流側」という。）の短手端４３に略矩形形状の２つの切り欠き４５が形成されている。また回路基板４は、吸入口２８から２つの排出口２９、３０への空気の流れの下流側（以下、単に「下流側」という。）の短手端４４に略矩形形状の切り欠き４６が形成されている。   The circuit board 4 is mounted with a charge / discharge control circuit for the battery 3, and is disposed at a position adjacent to the upper surface side of the battery group including the plurality of batteries 3. More specifically, the circuit board 4 is provided inside the housing body 2 so as to be along the flow direction of air from the suction port 28 to the two discharge ports 29 and 30 (the direction indicated by symbol A). The side faces the battery 3 and the other side faces the inner wall surface of the housing cover 1. On the long end 42 of the circuit board 4, four substantially rectangular cutouts 41 having the same shape are formed at intervals of four. Further, the circuit board 4 has two notches having a substantially rectangular shape at the short end 43 on the upstream side (hereinafter simply referred to as “upstream side”) of the air flow from the suction port 28 to the two discharge ports 29 and 30. 45 is formed. The circuit board 4 has a substantially rectangular notch 46 at a short end 44 on the downstream side (hereinafter simply referred to as “downstream side”) of the air flow from the suction port 28 to the two discharge ports 29 and 30. Is formed.

４つの基板ホルダー５は、回路基板４を支持する部材であり、回路基板４に形成された切り欠き４１に対応する位置に各々配設され、切り欠き４１に係合した状態で回路基板４の長手端４２の両端を支持する。   The four board holders 5 are members that support the circuit board 4, are respectively disposed at positions corresponding to the notches 41 formed in the circuit board 4, and are engaged with the notches 41. Both ends of the longitudinal end 42 are supported.

「送風装置」としての冷却ファン６〜８は、筐体本体２の吸入口２８から排出口２９、３０への空気の流れを筐体本体２の内部に形成して、筐体本体２に設けられた電池３、回路基板４、ＤＣ−ＤＣコンバーター９等を冷却する。より具体的には冷却ファン６は、筐体本体２の吸入口２８の内側に設けられており、吸入口２８を通じて外部から筐体本体２の内部へ空気を送る。冷却ファン６により吸入口２８から筐体本体２の内部へ送られた空気は、一部が筐体本体２の排出口２９から外部へ排出され、一部が冷却ファン７へ送られる。冷却ファン７は、筐体本体２の電池３及び回路基板４の下流側に設けられており、冷却ファン６により筐体本体２の内部へ送られた空気の一部を下流側のＤＣ−ＤＣコンバーター９へ送る。冷却ファン８は、筐体本体２の排出口３０の内側に設けられており、冷却ファン７によりＤＣ−ＤＣコンバーター９へ送られた空気を筐体本体２の排出口３０から外部へ排出する。   The cooling fans 6 to 8 as “blowers” are provided in the housing body 2 by forming an air flow from the suction port 28 of the housing body 2 to the discharge ports 29 and 30 inside the housing body 2. The battery 3, the circuit board 4, the DC-DC converter 9, etc., are cooled. More specifically, the cooling fan 6 is provided inside the suction port 28 of the housing body 2, and sends air from the outside to the inside of the housing body 2 through the suction port 28. A part of the air sent from the suction port 28 to the inside of the housing body 2 by the cooling fan 6 is discharged to the outside from the discharge port 29 of the housing body 2, and a part thereof is sent to the cooling fan 7. The cooling fan 7 is provided on the downstream side of the battery 3 and the circuit board 4 of the housing body 2, and a part of the air sent to the inside of the housing body 2 by the cooling fan 6 is supplied to the downstream DC-DC. Send to converter 9. The cooling fan 8 is provided inside the discharge port 30 of the housing body 2 and discharges the air sent to the DC-DC converter 9 by the cooling fan 7 from the discharge port 30 of the housing body 2 to the outside.

ＤＣ−ＤＣコンバーター９は、複数の電池３の出力電圧を定格電圧に降圧する。より具体的にはＤＣ−ＤＣコンバーター９は、５４個の電池３の総出力電圧（約２１．６Ｖ）を定格電圧１２Ｖに降圧して出力する。   The DC-DC converter 9 steps down the output voltage of the plurality of batteries 3 to the rated voltage. More specifically, the DC-DC converter 9 steps down and outputs the total output voltage (about 21.6 V) of the 54 batteries 3 to the rated voltage 12 V.

電池ユニット１０の組み立て構造の概略について説明する。   An outline of the assembly structure of the battery unit 10 will be described.

まず冷却ファン６〜８、ＤＣ−ＤＣコンバーター９をそれぞれ所定の位置に取り付けた後、電池３を筐体本体２に実装する。より具体的には、まず１８個の電池３を幅方向へ３個、長さ方向へ６個、隣接して並べた状態で直列接続し、金属板からなる一枚のリード板（図示せず）に溶接した電池ブロックを三つ構成する。そして、その三つの電池ブロックを筐体本体２に積層して実装する。このとき必要に応じて、粘着テープ等で三つの電池ブロックを一体に連結してもよい。つづいて四つの基板ホルダー５を取り付けた状態の回路基板４を最上位にある電池ブロックの上面側に隣接する位置に載置する（図２）。つづいて各電池ブロックのリード板（図示せず）の側部両端に形成された凸部（図示せず）を回路基板４に半田付けして固定する。   First, the cooling fans 6 to 8 and the DC-DC converter 9 are respectively attached to predetermined positions, and then the battery 3 is mounted on the housing body 2. More specifically, first, 18 battery 3 are connected in series in a state where 3 batteries in the width direction and 6 batteries in the length direction are arranged side by side, and one lead plate (not shown) made of a metal plate. 3) The battery blocks welded to 3) are constructed. Then, the three battery blocks are stacked and mounted on the housing body 2. At this time, if necessary, the three battery blocks may be integrally connected with an adhesive tape or the like. Subsequently, the circuit board 4 with the four board holders 5 attached thereto is placed at a position adjacent to the upper surface side of the uppermost battery block (FIG. 2). Subsequently, convex portions (not shown) formed on both side portions of a lead plate (not shown) of each battery block are fixed to the circuit board 4 by soldering.

つづいて筐体カバー１の段差部１７に筐体本体２の側端部２７が突き当たった状態で、筐体カバー１を筐体本体２に組み付け（図１）、四つの雄ネジ２５で回路基板４を筐体本体２にネジ止め固定する。より具体的には、筐体カバー１の四つの円形貫通孔１１及び筐体本体２の四つの円形貫通孔２１の各々に雄ネジ２５を挿通する。そして、基板ホルダー５に埋設された金属ネジブッシュ（図示せず）の雌ネジ孔に、その雄ネジ２５を螺合させ、筐体カバー１及び筐体本体２を共締めする。それによって回路基板４は、四つの基板ホルダー５を介して筐体本体２に固定された状態となる。   Subsequently, the housing cover 1 is assembled to the housing body 2 with the side end portion 27 of the housing body 2 abutting against the stepped portion 17 of the housing cover 1 (FIG. 1), and the circuit board is formed with the four male screws 25. 4 is fixed to the main body 2 with screws. More specifically, the male screw 25 is inserted into each of the four circular through holes 11 of the housing cover 1 and the four circular through holes 21 of the housing body 2. Then, the male screw 25 is screwed into a female screw hole of a metal screw bush (not shown) embedded in the substrate holder 5, and the housing cover 1 and the housing body 2 are fastened together. As a result, the circuit board 4 is fixed to the housing body 2 via the four board holders 5.

つづいて二つの雄ネジ１５、四つの雄ネジ１６及び一つの雄ネジ２６を用いて、筐体カバー１を筐体本体２にネジ止め固定する。より具体的には、筐体本体２の円形貫通孔２２に雄ネジ２６を挿通し、その雄ネジ２６を筐体カバー１の雌ネジ孔１２に螺合させる。筐体カバー１の二つの円形貫通孔１３の各々に雄ネジ１５を挿通し、その雄ネジ１５を筐体本体２の雌ネジ孔２３に螺合させる。筐体カバー１の四つの円形貫通孔１４の各々に雄ネジ１６を挿通し、その雄ネジ１６を筐体本体２の雌ネジ孔２４に螺合させる。   Subsequently, the housing cover 1 is screwed and fixed to the housing body 2 using two male screws 15, four male screws 16 and one male screw 26. More specifically, a male screw 26 is inserted into the circular through hole 22 of the housing body 2, and the male screw 26 is screwed into the female screw hole 12 of the housing cover 1. The male screw 15 is inserted into each of the two circular through holes 13 of the housing cover 1, and the male screw 15 is screwed into the female screw hole 23 of the housing body 2. The male screw 16 is inserted into each of the four circular through holes 14 of the housing cover 1, and the male screw 16 is screwed into the female screw hole 24 of the housing body 2.

冷却ファン６〜８により筐体本体２の内部に構成される空気の流れについて説明する。   The flow of air configured inside the casing body 2 by the cooling fans 6 to 8 will be described.

回路基板４に形成された「分流路」としての２つの切り欠き４５は、冷却ファン６により回路基板４の一面側（電池３と対面する側）に流れる空気の一部を回路基板４の他面側（筐体カバー１の内壁面と対面する側）へ導く空気流路である。冷却ファン６により外部から筐体本体２の内部へ送られる空気は、図４の符号Ａ１、Ａ３〜Ａ５、図５の符号Ａ７で図示したように、回路基板４の一面側及び電池３の周囲に流れ、排出口２９、３０から外部へ排出される。そして２つの切り欠き４５を回路基板４に設けることによって、冷却ファン６により外部から筐体本体２の内部へ送られる空気は、図４の符号Ａ２、Ａ６、図５の符号Ａ８で図示したように、その一部が切り欠き４５を通じて回路基板４の他面側に流れ、排出口２９、３０から外部へ排出される。   The two cutouts 45 formed as “dividing channels” formed on the circuit board 4 allow a part of the air flowing to one side of the circuit board 4 (side facing the battery 3) by the cooling fan 6 to be separated from the circuit board 4. It is an air flow path that leads to the surface side (side facing the inner wall surface of the housing cover 1). The air sent from the outside to the inside of the housing body 2 by the cooling fan 6 is one side of the circuit board 4 and the periphery of the battery 3 as shown by reference numerals A1, A3 to A5 in FIG. 4 and reference numeral A7 in FIG. And is discharged from the discharge ports 29 and 30 to the outside. And by providing the two notches 45 in the circuit board 4, the air sent from the outside to the inside of the housing body 2 by the cooling fan 6 is shown by reference numerals A2 and A6 in FIG. 4 and reference numeral A8 in FIG. In addition, a part thereof flows to the other side of the circuit board 4 through the notch 45 and is discharged from the discharge ports 29 and 30 to the outside.

つまり２つの切り欠き４５を回路基板４に設けることによって、従来は空気が滞留して熱がこもりやすかった回路基板４の他面側と筐体カバー１の内壁面との間の空間に、冷却ファン６〜８による空気の流れを形成することができる。それによって回路基板４の他面側と筐体カバー１の内壁面との間の空間に熱がこもる虞を低減することができるので、筐体本体２の内部空間の冷却効率を高めることができる。   In other words, by providing the two notches 45 in the circuit board 4, cooling is provided in the space between the other surface side of the circuit board 4 and the inner wall surface of the housing cover 1, where air has conventionally accumulated and heat has been easily trapped. An air flow by the fans 6 to 8 can be formed. As a result, it is possible to reduce the possibility that heat is trapped in the space between the other surface side of the circuit board 4 and the inner wall surface of the housing cover 1, so that the cooling efficiency of the internal space of the housing body 2 can be increased. .

このようにして本発明によれば、より放熱効率の高い電池ユニット１０を提供することができる。   Thus, according to this invention, the battery unit 10 with higher heat dissipation efficiency can be provided.

回路基板４の切り欠き４５（分流路）は、上記説明した実施例のように、回路基板４の上流側の端部（短手端４３）に形成されているのが好ましい。それによって回路基板４の他面側と筐体カバー１の内壁面との間の空間には、少なくとも回路基板４の上流側端部から冷却ファン６〜８による空気の流れが形成される。回路基板４の他面側と筐体カバー１の内壁面との間の空間に熱がこもる虞をさらに低減することができるので、筐体本体２の内部空間の冷却効率をさらに高めることができる。   The notch 45 (dividing flow path) of the circuit board 4 is preferably formed at the upstream end (short end 43) of the circuit board 4 as in the embodiment described above. Thereby, in the space between the other surface side of the circuit board 4 and the inner wall surface of the housing cover 1, air flows from the cooling fans 6 to 8 are formed at least from the upstream end of the circuit board 4. Since it is possible to further reduce the possibility that heat is trapped in the space between the other surface side of the circuit board 4 and the inner wall surface of the housing cover 1, the cooling efficiency of the internal space of the housing body 2 can be further increased. .

回路基板４の切り欠き４５は、特に矩形形状に限定されるものではなく、その形状はどのような形状でもよい。また回路基板４の一面側に流れる空気の一部を回路基板４の他面側へ導く空気流路は、特に回路基板４に形成した切り欠き４５に限定されるものではなく、例えば回路基板４に貫通孔を設けて形成してもよい。   The cutout 45 of the circuit board 4 is not particularly limited to a rectangular shape, and the shape may be any shape. Further, the air flow path for guiding a part of the air flowing on one surface side of the circuit board 4 to the other surface side of the circuit board 4 is not particularly limited to the notch 45 formed in the circuit board 4. You may form in a through-hole.

また回路基板４に形成された「合流路」としての切り欠き４６は、回路基板４の他面側に流れる空気を回路基板４の一面側へ導く空気流路である。これは本発明に必須の構成要素ではないが、このような切り欠き４６を設けることによって、回路基板４の他面側に流れる空気が切り欠き４６を通じて回路基板４の一面側へ導かれ、排出口２９、３０から外部へ排出されることになる。つまり回路基板４の他面側から排出口２９、３０への空気の流路を形成することによって、回路基板４の他面側に空気を流れやすくすることができる。それによって回路基板４の他面側と筐体カバー１の内壁面との間の空間に熱がこもる虞をさらに低減することができるので、筐体本体２の内部空間の冷却効率をさらに高めることができる。   A notch 46 as an “joining channel” formed in the circuit board 4 is an air channel that guides air flowing on the other surface side of the circuit board 4 to one surface side of the circuit board 4. Although this is not an essential component of the present invention, by providing such a notch 46, air flowing to the other surface side of the circuit board 4 is guided to the one surface side of the circuit board 4 through the notch 46 and discharged. It will be discharged | emitted from the exits 29 and 30 outside. That is, by forming an air flow path from the other surface side of the circuit board 4 to the discharge ports 29 and 30, air can be easily flowed to the other surface side of the circuit board 4. As a result, it is possible to further reduce the possibility of heat being accumulated in the space between the other surface side of the circuit board 4 and the inner wall surface of the housing cover 1, thereby further increasing the cooling efficiency of the internal space of the housing body 2. Can do.

回路基板４の切り欠き４６（合流路）は、上記説明した実施例のように、回路基板４の下流側の端部（短手端４４）に形成されているのが好ましい。それによって回路基板４の他面側と筐体カバー１の内壁面との間の空間には、少なくとも回路基板４の下流側端部まで冷却ファン６〜８による空気の流れが形成される。回路基板４の他面側と筐体カバー１の内壁面との間の空間に熱がこもる虞をさらに低減することができるので、筐体本体２の内部空間の冷却効率をさらに高めることができる。   The notch 46 (joint flow path) of the circuit board 4 is preferably formed at the downstream end (short end 44) of the circuit board 4 as in the above-described embodiment. Thereby, in the space between the other surface side of the circuit board 4 and the inner wall surface of the housing cover 1, an air flow is formed by the cooling fans 6 to 8 at least to the downstream end of the circuit board 4. Since it is possible to further reduce the possibility that heat is trapped in the space between the other surface side of the circuit board 4 and the inner wall surface of the housing cover 1, the cooling efficiency of the internal space of the housing body 2 can be further increased. .

回路基板４の切り欠き４６は、特に矩形形状に限定されるものではなく、その形状はどのような形状でもよい。また回路基板４の他面側に流れる空気を回路基板４の一面側へ導く空気流路は、特に回路基板４に形成した切り欠き４６に限定されるものではなく、例えば回路基板４に貫通孔を設けて形成してもよい。   The cutout 46 of the circuit board 4 is not particularly limited to a rectangular shape, and the shape may be any shape. The air flow path for guiding the air flowing on the other surface side of the circuit board 4 to the one surface side of the circuit board 4 is not particularly limited to the notch 46 formed in the circuit board 4. May be formed.

尚、本発明は、上記説明した実施例に特に限定されるものではなく、特許請求の範囲に記載された発明の範囲内で種々の変形が可能であること言うまでもない。   Note that the present invention is not particularly limited to the above-described embodiments, and it goes without saying that various modifications are possible within the scope of the invention described in the claims.

１ 筐体カバー
２ 筐体本体
３ 電池
４ 回路基板
５ 基板ホルダー
６〜８ 冷却ファン
９ ＤＣ−ＤＣコンバーター
１０ 電池ユニット
２８ 吸入口
２９、３０ 排出口
４５ 回路基板４の切り欠き（分流路）
４６ 回路基板４の切り欠き（合流路） DESCRIPTION OF SYMBOLS 1 Case cover 2 Case body 3 Battery 4 Circuit board 5 Board holder 6-8 Cooling fan 9 DC-DC converter 10 Battery unit 28 Inlet 29, 30 Outlet 45 Notch (division flow path) of circuit board 4
46 Notch of circuit board 4 (joint flow path)

Claims (4)

吸入口及び排出口が設けられた筐体と、
前記吸入口から前記排出口への空気の流れを前記筐体の内部に形成する送風装置と、
前記筐体の内部に設けられた電池と、
前記吸入口から前記排出口への空気の流れに沿うように前記筐体の内部に設けられ、一面側が前記電池と対面し他面側が前記筐体の内壁面と対面する回路基板と、を備え、
前記送風装置は、前記電池の周囲及び前記回路基板の一面側に空気の流れを形成するように配設されており、
前記回路基板は、前記送風装置により前記回路基板の一面側に流れる空気の一部を前記回路基板の他面側へ導く分流路が形成されている、ことを特徴とする電池ユニット。 A housing provided with a suction port and a discharge port;
A blower that forms an air flow from the suction port to the discharge port in the housing;
A battery provided inside the housing;
A circuit board provided inside the casing so as to follow an air flow from the suction port to the discharge port, and having one surface facing the battery and the other surface facing the inner wall surface of the housing. ,
The blower is disposed so as to form an air flow around the battery and on one side of the circuit board,
The battery unit, wherein the circuit board is formed with a diversion channel that guides a part of the air flowing to one side of the circuit board to the other side of the circuit board by the blower. 請求項１に記載の電池ユニットにおいて、前記回路基板は、前記吸入口から前記排出口への空気の流れの上流側の端部に前記分流路が形成されている、ことを特徴とする電池ユニット。   2. The battery unit according to claim 1, wherein the circuit board has the branch channel formed at an upstream end portion of an air flow from the suction port to the discharge port. 3. . 請求項１又は２に記載の電池ユニットにおいて、前記回路基板は、前記回路基板の他面側に流れる空気を前記回路基板の一面側へ導く合流路が形成されている、ことを特徴とする電池ユニット。   3. The battery unit according to claim 1, wherein the circuit board is formed with a joint channel that guides air flowing to the other surface side of the circuit board to the one surface side of the circuit board. unit. 請求項３に記載の電池ユニットにおいて、前記回路基板は、前記吸入口から前記排出口への空気の流れの下流側の端部に前記合流路が形成されている、ことを特徴とする電池ユニット。   4. The battery unit according to claim 3, wherein the circuit board has the joint channel formed at an end portion on a downstream side of an air flow from the suction port to the discharge port. 5. .
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