JP2018073669A - Battery module - Google Patents

Battery module Download PDF

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JP2018073669A
JP2018073669A JP2016213266A JP2016213266A JP2018073669A JP 2018073669 A JP2018073669 A JP 2018073669A JP 2016213266 A JP2016213266 A JP 2016213266A JP 2016213266 A JP2016213266 A JP 2016213266A JP 2018073669 A JP2018073669 A JP 2018073669A
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cooling air
battery
plate
battery cells
cooling
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JP6794781B2 (en
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伸恭 錦
Nobutaka Nishiki
伸恭 錦
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Toyota Motor 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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Abstract

PROBLEM TO BE SOLVED: To improve cooling efficiency of a battery module including two or more battery cells fixed so as to be laminated with gaps on a plate by reducing temperature rise of cooling air, which is caused by heat release from the battery cells.SOLUTION: A cooling groove 26 is provided between each corresponding battery cell 12 on a plate 20 so as to face a gap 14 where the battery cells 12 is placed and a cooling air introduction path 24 that opens to the cooling groove 26 on the bottom surface 22 of the plate 20 is provided. When cooling air that cools the battery cells 12 is caused to flow from the cooling air introduction path 24 and guided between the battery cells 12 through cooling groove 26, cooling efficiency of a battery module 10 can be improved by reducing a heat amount of cooling air compared with a heat release amount from the bottom surfaces of the battery cells 12 and suppressing temperature rise of the cooling air.SELECTED DRAWING: Figure 1

Description

本発明は、プレートと、プレート上に隙間を空けて積層するように固定された複数のバッテリセルとを備えるバッテリモジュールに関する。   The present invention relates to a battery module including a plate and a plurality of battery cells fixed so as to be stacked on the plate with a gap therebetween.

従来から、電気自動車、ハイブリッド車両、鉄道車両等では、車両の駆動源として回転電機が用いられ、回転電機の電力源として、車両には複数のバッテリセルを備えるバッテリモジュール（バッテリスタック又は組電池）が、ケース等に収容されたバッテリパックとして搭載されている。   Conventionally, in an electric vehicle, a hybrid vehicle, a railway vehicle, and the like, a rotating electric machine is used as a driving source of the vehicle, and the battery module (battery stack or assembled battery) including a plurality of battery cells in the vehicle as a power source of the rotating electric machine. However, it is mounted as a battery pack housed in a case or the like.

バッテリモジュールの冷却方法としては、バッテリモジュールの上下又は側面に給気チャンバ及び排気チャンバを設け、給気チャンバから供給された冷却風を、バッテリセル間に設けられた冷却通路を通過させ、バッテリセルを冷却した後の排気を排気チャンバから排出することにより、個々のバッテリセルを冷却する方式が知られている。   As a method for cooling the battery module, an air supply chamber and an exhaust chamber are provided on the upper and lower sides or the side surface of the battery module, and the cooling air supplied from the air supply chamber is passed through the cooling passage provided between the battery cells. A system is known in which individual battery cells are cooled by discharging the exhaust gas after cooling the battery from the exhaust chamber.

特許文献１には、複数の電池セルを収容する電池室と、冷却空気室と、冷却空気室へ大気圧以上の静圧で冷却空気を供給するファンとから構成され、電池室の底部の電池セル間の間隔に対応する位置に空気導入孔が設けられた電池パックが開示されている。特許文献１には、ファンが大気圧以上の静圧で冷却空気を供給することで、各空気導入孔から電池室へ流入する冷却空気の風量が等しくなり、電池セルを均一に冷却できると記載されている。   Patent Document 1 includes a battery chamber that houses a plurality of battery cells, a cooling air chamber, and a fan that supplies cooling air to the cooling air chamber at a static pressure equal to or higher than atmospheric pressure. A battery pack is disclosed in which an air introduction hole is provided at a position corresponding to an interval between cells. Patent Document 1 describes that when the fan supplies cooling air at a static pressure equal to or higher than atmospheric pressure, the air volume of the cooling air flowing from each air introduction hole into the battery chamber becomes equal, and the battery cells can be cooled uniformly. Has been.

特許文献２には、電池モジュールの上部冷媒流路および下部冷媒流路と、電池モジュールの一方の側部に沿って設けられた内部吸気ダクトと、電池モジュールの他方の側部に沿って設けられた内部排気ダクトとを備え、少なくともいずれか一方のダクト内には、冷媒の流れを電池セルの積層方向に対して略直交する方向に向けて整流するための冷媒整流手段が設けられた電池パックが開示されている。特許文献２には、当該冷媒整流手段を設けることで冷媒流れの乱れが解消され、その結果、電池モジュール全体に対して均一に冷媒を供給できると記載されている。   In Patent Document 2, an upper refrigerant channel and a lower refrigerant channel of the battery module, an internal intake duct provided along one side of the battery module, and the other side of the battery module are provided. A battery pack provided with refrigerant rectification means for rectifying the flow of the refrigerant in a direction substantially perpendicular to the stacking direction of the battery cells in at least one of the ducts. Is disclosed. Patent Document 2 describes that the disturbance of the refrigerant flow is eliminated by providing the refrigerant rectifying means, and as a result, the refrigerant can be supplied uniformly to the entire battery module.

特開２０１１−１３８７３０号公報JP2011-138730A 特開２００６−２８６５１９号公報JP 2006-286519 A

バッテリパック及びその冷却システムの低背化を目的として、バッテリセルの積層方向の側面又は積層方向と直交する側面から冷却風を導入し、バッテリモジュールの上下又は側面に設けた吸気チャンバ内において冷却風を水平方向に流して、冷却風が複数のバッテリセルに均等に分配されるよう構成されたバッテリパックが知られている。しかしながら、上記構成を有するバッテリパックにおいては、バッテリセルの吸気チャンバ側から放出された熱が吸気チャンバに伝わることにより、吸気チャンバ内を流れる冷却風の温度上昇が避けられない。例えば、吸気チャンバ内において冷却風がバッテリセルの積層方向に沿って流れる構成を有するバッテリパックでは、バッテリセルの放熱により冷却風の下流側の温度が上昇することにより、冷却風の下流側に配置されたバッテリセルの冷却効率が低下して、バッテリセル間で冷却効率の不均衡が生じ、その結果、バッテリモジュールの冷却性能が低下することが考えられる。   For the purpose of reducing the height of the battery pack and its cooling system, cooling air is introduced from the side surface in the stacking direction of the battery cells or from the side surface perpendicular to the stacking direction, and the cooling air is introduced into the intake chamber provided above and below or the side surface of the battery module. There is known a battery pack configured such that the cooling air is evenly distributed to a plurality of battery cells by flowing in the horizontal direction. However, in the battery pack having the above configuration, the heat released from the intake chamber side of the battery cell is transmitted to the intake chamber, so that the temperature of the cooling air flowing in the intake chamber is inevitably increased. For example, in a battery pack having a configuration in which cooling air flows along the stacking direction of the battery cells in the intake chamber, the temperature on the downstream side of the cooling air rises due to heat dissipation of the battery cells, and is arranged downstream of the cooling air. It is conceivable that the cooling efficiency of the battery cell is lowered, and an imbalance of the cooling efficiency occurs between the battery cells, and as a result, the cooling performance of the battery module is lowered.

本発明の目的は、プレート上に隙間を空けて積層するように固定された複数のバッテリセルを備え、冷却風がバッテリセル間を通過してバッテリセルを冷却するバッテリモジュールにおいて、バッテリセルからの放熱による冷却風の温度上昇を低減することで冷却効率を向上できるバッテリモジュールを提供することである。   An object of the present invention is to provide a battery module including a plurality of battery cells fixed so as to be stacked with a gap on a plate, and cooling air passing between the battery cells to cool the battery cells. An object of the present invention is to provide a battery module capable of improving the cooling efficiency by reducing the temperature rise of cooling air due to heat radiation.

本発明は、プレートと、前記プレート上に隙間を空けて積層するように固定された複数のバッテリセルと、を備えるバッテリモジュールであって、前記プレートには、前記隙間に対向して冷却溝が前記バッテリセル間ごとに設けられ、前記プレートの下面には、前記冷却溝に対して開口する冷却風導入路が設けられ、前記バッテリセルを冷却する冷却風が、前記冷却風導入路から流入し、前記冷却溝を通って前記バッテリセル間に導かれる、バッテリモジュールに関する。   The present invention is a battery module comprising a plate and a plurality of battery cells fixed so as to be stacked with a gap on the plate, wherein the plate has a cooling groove facing the gap. Provided between the battery cells, and on the lower surface of the plate, a cooling air introduction path that opens to the cooling groove is provided, and cooling air that cools the battery cells flows from the cooling air introduction path. The battery module is guided between the battery cells through the cooling groove.

本発明によれば、冷却風が、バッテリセル間ごとに設けられた冷却風導入路により当該バッテリセル間に導かれることにより、バッテリセルの底面からの放熱量に対して冷却風が受け取る熱量を低減し、冷却風の温度上昇を抑制することで、バッテリモジュールの冷却効率を向上できる。   According to the present invention, the cooling air is guided between the battery cells by the cooling air introduction path provided between the battery cells, so that the amount of heat received by the cooling air with respect to the heat radiation from the bottom surface of the battery cell is reduced. The cooling efficiency of the battery module can be improved by reducing the temperature rise of the cooling air.

本発明に係る実施形態のバッテリモジュールの一例を示す斜視図である。It is a perspective view which shows an example of the battery module of embodiment which concerns on this invention. 図１に示すバッテリモジュールに備えられたプレートの構造を示す斜視図である。It is a perspective view which shows the structure of the plate with which the battery module shown in FIG. 1 was equipped. 図１のプレートをＡ−Ａ線で断面した部分断面図である。It is the fragmentary sectional view which cut the plate of FIG. 1 by the AA line. 吸気ダクト（ａ）及び吸気チャンバ（ｂ）の構造の一例を示す斜視図である。It is a perspective view which shows an example of the structure of an intake duct (a) and an intake chamber (b).

以下、本発明の実施形態について図面を参照しながら説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１は、本実施形態に係るバッテリモジュール１０の一例を示す斜視図である。図２は、図１に示すバッテリモジュール１０に備えられたプレート２０の構造を示す斜視図である。図３は、図１のＡ−Ａ線の部分断面図である。バッテリモジュール１０は、プレート２０と、プレート２０上に隙間１４を空けて積層するように固定された複数のバッテリセル１２とを備える。以下、バッテリセル１２を積層した方向を「積層方向」、重力方向を「高さ方向」、積層方向と高さ方向に直交する方向を「幅方向」と記載する。   FIG. 1 is a perspective view showing an example of a battery module 10 according to the present embodiment. FIG. 2 is a perspective view showing the structure of the plate 20 provided in the battery module 10 shown in FIG. FIG. 3 is a partial cross-sectional view taken along line AA of FIG. The battery module 10 includes a plate 20 and a plurality of battery cells 12 fixed so as to be stacked on the plate 20 with a gap 14 therebetween. Hereinafter, a direction in which the battery cells 12 are stacked is referred to as a “stacking direction”, a gravity direction is referred to as a “height direction”, and a direction orthogonal to the stacking direction is referred to as a “width direction”.

バッテリモジュール１０は、車両の客室下又は荷室下等に形成される収容スペースに、ケース等に収容されたバッテリパックとして配置される。収容スペースは、例えば、客室の床面に設けられたシート、コンソール、フロアケース、フロアカーペット、又は、荷室の床面に設けられたデッキケース等の、車両の内装部材下に形成される。バッテリモジュール１０は、車両駆動用の電動機に電力を供給し、また、回生制動などによって電動機で発電された電力により充電される。   The battery module 10 is arranged as a battery pack housed in a case or the like in a housing space formed under the passenger compartment or the cargo compartment of the vehicle. The accommodation space is formed under an interior member of the vehicle, such as a seat, console, floor case, floor carpet, or deck case provided on the floor of the luggage compartment, for example. The battery module 10 supplies electric power to the electric motor for driving the vehicle, and is charged with electric power generated by the electric motor by regenerative braking or the like.

本実施形態に係るバッテリモジュール１０は、プレート２０と積層された複数のバッテリセル１２とで構成される略直方体の形状を有しており、バッテリセル１２の積層方向はバッテリモジュール１０の長手方向と一致している。複数のバッテリセル１２は、例えばバスバー等によって電気的に接続されている。バッテリセル１２は平板状の略直方体の形状を有する。バッテリセル１２は、例えば、リチウムイオン電池やニッケル水素電池等の二次電池であってよい。   The battery module 10 according to the present embodiment has a substantially rectangular parallelepiped shape composed of a plate 20 and a plurality of battery cells 12 stacked, and the stacking direction of the battery cells 12 is the longitudinal direction of the battery module 10. Match. The plurality of battery cells 12 are electrically connected by, for example, a bus bar. The battery cell 12 has a flat, substantially rectangular parallelepiped shape. The battery cell 12 may be a secondary battery such as a lithium ion battery or a nickel metal hydride battery.

本実施形態に係るバッテリモジュール１０では、プレート２０上に、複数のバッテリセル１２が隙間１４を空けて固定される。本実施形態では、図２に示す取付点１６の位置においてネジ止めすることにより、バッテリセル１２がプレート２０上に固定されるが、バッテリセル１２をプレート２０上に固定する手段について制限はなく、ボルト、接着剤等の公知の固定手段であってもよい。後述するように、隣接するバッテリセル１２間に設けられた隙間１４を冷却風が通過することにより、バッテリセル１２が冷却される。   In the battery module 10 according to the present embodiment, a plurality of battery cells 12 are fixed on the plate 20 with a gap 14 therebetween. In the present embodiment, the battery cell 12 is fixed on the plate 20 by screwing at the position of the attachment point 16 shown in FIG. 2, but there is no limitation on the means for fixing the battery cell 12 on the plate 20, Known fixing means such as bolts and adhesives may be used. As will be described later, when the cooling air passes through a gap 14 provided between adjacent battery cells 12, the battery cell 12 is cooled.

本実施形態に係るバッテリモジュール１０において、プレート２０には、隙間１４に対向する冷却溝２６がバッテリセル１２間ごとに設けられる。冷却溝２６はプレート２０を貫通して、冷却溝２６に対向するバッテリセル１２間の隙間１４と後述する冷却風導入路２４とを連通している。冷却溝２６の形状等は、冷却風導入路２４の形状、冷却風の所望の風量等によって適宜決定すればよい。   In the battery module 10 according to the present embodiment, the plate 20 is provided with a cooling groove 26 facing the gap 14 between the battery cells 12. The cooling groove 26 penetrates the plate 20 and communicates the gap 14 between the battery cells 12 facing the cooling groove 26 and a cooling air introduction path 24 described later. The shape and the like of the cooling groove 26 may be appropriately determined depending on the shape of the cooling air introduction path 24, the desired air volume of the cooling air, and the like.

図２及び図３に示すように、本実施形態に係るバッテリモジュール１０では、プレート２０の下面２２に、冷却溝２６に対して開口する冷却風導入路２４が設けられる。冷却風導入路２４は、プレート２０に沿って幅方向に延びる中空形状の部材であって、内周面の上部の一部が冷却溝２６に対して開口している。冷却風導入路２４には、幅方向（冷却風導入路２４の長手方向）の端部の少なくとも一方から冷却風が流入する。   As shown in FIGS. 2 and 3, in the battery module 10 according to this embodiment, a cooling air introduction path 24 that opens to the cooling groove 26 is provided on the lower surface 22 of the plate 20. The cooling air introduction path 24 is a hollow member extending in the width direction along the plate 20, and a part of the upper part of the inner peripheral surface is open to the cooling groove 26. Cooling air flows into the cooling air introduction passage 24 from at least one of the end portions in the width direction (longitudinal direction of the cooling air introduction passage 24).

図１〜図３において、本実施形態のバッテリモジュール１０における冷却風の流れを矢印で示す。冷却風は、バッテリモジュール１０の幅方向の側面から冷却風導入路２４内に流入し、冷却風導入路２４内を幅方向に向かった後、冷却溝２６を通ってバッテリセル１２間に導かれる。バッテリセル１２間に導かれた冷却風は、バッテリセル１２間の隙間１４を通過する間、バッテリセル１２を冷却する。なお、バッテリセル１２間に導かれる冷却風が十分なバッテリセル１２の冷却能力を保持するように、後述する送風機等によって、バッテリセル１２間に導かれる冷却風の風量が調整される。   1 to 3, the flow of cooling air in the battery module 10 of the present embodiment is indicated by arrows. The cooling air flows into the cooling air introduction passage 24 from the side surface in the width direction of the battery module 10, travels in the cooling air introduction passage 24 in the width direction, and then is guided between the battery cells 12 through the cooling groove 26. . The cooling air guided between the battery cells 12 cools the battery cells 12 while passing through the gaps 14 between the battery cells 12. Note that the air volume of the cooling air guided between the battery cells 12 is adjusted by a blower described later so that the cooling air guided between the battery cells 12 maintains sufficient cooling capacity of the battery cell 12.

このように、本実施形態に係るバッテリモジュール１０では、バッテリセル１２をプレート２０上に固定する一方、バッテリセル１２間を通過する冷却風を、バッテリセル１２間ごとにプレート２０の下面２２に設けた専用の冷却風導入路２４によって、バッテリモジュール１０の外部から直接導いている。そのため、冷却風はバッテリセル１２間に導かれるまでの間にバッテリセル１２が放出した熱を直接受け取らない。また、プレート２０の下面２２側には、積層方向における冷却風導入路２４間であって、プレート２０を挟んでバッテリセル１２と対向するプレート下方空間２８が形成される。よって、本実施形態に係るバッテリモジュール１０では、バッテリセル１２の下面から放出した熱量は、プレート２０からプレート下方空間２８に放熱がなされる。これにより、冷却風がバッテリモジュール１０に流入してからバッテリセル１２間に導かれるまでの間に、バッテリセル１２の放熱に由来し、冷却風が受け取る熱の熱量が大幅に低下する。冷却風がバッテリセル１２から受け取る熱量が大幅に低下するので、冷却風の温度上昇が低減し、バッテリセル１２の冷却効率の低下が抑制される。   As described above, in the battery module 10 according to the present embodiment, the battery cells 12 are fixed on the plate 20, while the cooling air passing between the battery cells 12 is provided on the lower surface 22 of the plate 20 between the battery cells 12. The dedicated cooling air introduction path 24 leads directly from the outside of the battery module 10. Therefore, the cooling air does not directly receive the heat released by the battery cells 12 until it is guided between the battery cells 12. Further, on the lower surface 22 side of the plate 20, a plate lower space 28 is formed between the cooling air introduction paths 24 in the stacking direction and opposed to the battery cells 12 with the plate 20 interposed therebetween. Therefore, in the battery module 10 according to the present embodiment, the amount of heat released from the lower surface of the battery cell 12 is radiated from the plate 20 to the plate lower space 28. As a result, the amount of heat received by the cooling air due to the heat radiation of the battery cells 12 significantly decreases between the time when the cooling air flows into the battery module 10 and the time when it is guided between the battery cells 12. Since the amount of heat received by the cooling air from the battery cell 12 is significantly reduced, the temperature rise of the cooling air is reduced, and the reduction in the cooling efficiency of the battery cell 12 is suppressed.

また、本実施形態に係るバッテリモジュール１０では、バッテリセル１２間毎に専用の冷却風導入路２４を設けることにより、積層方向において冷却風の温度が均一化される。よって、バッテリモジュール１０の上下又は側面に設けた吸気チャンバ内を積層方向に沿って冷却風を流す構成を有するバッテリモジュール１０と比較して、バッテリセル１２を冷却する冷却風の温度が積層方向の位置で異なる事態が殆ど生じず、冷却風の積層方向における温度の均一化を達成できるため、バッテリモジュール１０における積層方向の冷却効率が向上される。   Further, in the battery module 10 according to the present embodiment, by providing the dedicated cooling air introduction path 24 between the battery cells 12, the temperature of the cooling air is made uniform in the stacking direction. Therefore, the temperature of the cooling air that cools the battery cells 12 is higher in the stacking direction than the battery module 10 having a configuration in which the cooling air flows in the stacking direction in the intake chamber provided on the top and bottom or side surfaces of the battery module 10. Since there is almost no difference in position and the temperature can be made uniform in the stacking direction of the cooling air, the cooling efficiency of the battery module 10 in the stacking direction is improved.

図２に示すプレート２０は、図１においてバッテリセル１２間に相当する積層方向の位置ごとに２つの冷却溝２６及び２つの冷却風導入路２４をそれぞれ設けた構成を有する。１つのバッテリセル１２に対して２つの冷却溝２６及び２つの冷却風導入路２４を設けることにより、バッテリセル１２の幅方向の長さと同程度の長さを有する１つの冷却風導入路２４のみを設ける場合と比較して、冷却風が冷却風導入路２４内を通過する長さが短いために、冷却風が受け取る熱量が低減され、冷却風の温度上昇がより一層抑制される。バッテリモジュール１０は、バッテリセル１２の幅方向の長さと同程度の長さを有する１つの冷却風導入路２４のみを備えてもよい。   The plate 20 shown in FIG. 2 has a configuration in which two cooling grooves 26 and two cooling air introduction paths 24 are provided for each position in the stacking direction corresponding to the space between the battery cells 12 in FIG. By providing the two cooling grooves 26 and the two cooling air introduction paths 24 for one battery cell 12, only one cooling air introduction path 24 having a length similar to the length in the width direction of the battery cell 12 is provided. Compared with the case where the cooling air is provided, the length of the cooling air passing through the cooling air introduction path 24 is short, so the amount of heat received by the cooling air is reduced, and the temperature rise of the cooling air is further suppressed. The battery module 10 may include only one cooling air introduction path 24 having a length comparable to the length of the battery cell 12 in the width direction.

本実施形態に係るバッテリモジュール１０を構成するプレート２０は、例えば、樹脂等の材料を用いて、押出成形、インジェクション成形等を行うことにより製造すればよい。バッテリセル１２間ごとに２つの冷却溝２６及び２つの冷却風導入路２４を設けた図２に示すプレート２０は、例えば、幅方向の長さがプレート２０の略半分である第１プレート３０を作製する工程、第１プレート３０と対称的な形状を有する第２プレート３２を作製する工程、並びに、溶着等の公知の方法により、仕切板３４に第１プレート３０と第２プレート３２とを接合させて図２に示すプレート２０を作製する工程を経ることによって、製造することができる。   What is necessary is just to manufacture the plate 20 which comprises the battery module 10 which concerns on this embodiment by performing extrusion molding, injection molding, etc., using materials, such as resin, for example. The plate 20 shown in FIG. 2 in which the two cooling grooves 26 and the two cooling air introduction paths 24 are provided between the battery cells 12 is, for example, a first plate 30 whose length in the width direction is substantially half of the plate 20. The first plate 30 and the second plate 32 are joined to the partition plate 34 by a known process such as a manufacturing process, a second plate 32 having a symmetrical shape with the first plate 30, and welding. It can manufacture by passing through the process of making the plate 20 shown in FIG.

図４の（ａ）に、冷却風導入路２４へ冷却風を導く吸気ダクト４０の一例を示す。吸気ダクト４０は、バッテリモジュール１０の外部からの冷却風を冷却風導入路２４に送出する機能を有する。図４の（ａ）に示すように、吸気ダクト４０は、バッテリモジュール１０の幅方向の側面よりも外側に設けられるため、バッテリセル１２からの放熱が熱伝導により直接吸気ダクト４０に伝わることはない。冷却風導入路２４と吸気ダクト４０とをシールスポンジ等の断熱性部材を介して接続することにより、熱伝導による吸気ダクト４０の受熱をより一層低減できる。吸気ダクト４０に代えて、図４の（ｂ）に示す吸気チャンバ４２を使用してもよい。吸気チャンバ４２は、より多くの冷却風導入路２４へと冷却風を導入する。吸気ダクト４０又は吸気チャンバ４２の上流側には、車室内の空気を冷却風として吸気機構に送り込む送風機が設けられる。送風機としては、例えば、吐出型のファン又はブロア等が挙げられる。   FIG. 4A shows an example of an intake duct 40 that guides the cooling air to the cooling air introduction path 24. The intake duct 40 has a function of sending cooling air from the outside of the battery module 10 to the cooling air introduction path 24. As shown in FIG. 4A, since the intake duct 40 is provided outside the side surface in the width direction of the battery module 10, heat radiation from the battery cell 12 is directly transmitted to the intake duct 40 by heat conduction. Absent. By connecting the cooling air introduction path 24 and the intake duct 40 via a heat insulating member such as a seal sponge, the heat reception of the intake duct 40 due to heat conduction can be further reduced. Instead of the intake duct 40, an intake chamber 42 shown in FIG. 4B may be used. The intake chamber 42 introduces cooling air into more cooling air introduction paths 24. On the upstream side of the intake duct 40 or the intake chamber 42, a blower that sends air in the passenger compartment to the intake mechanism as cooling air is provided. Examples of the blower include a discharge type fan or blower.

バッテリモジュール１０は、バッテリセル１２からプレート２０へと伝わった熱を、より多く、冷却風導入路２４以外の空間に放出する構成を有することが好適である。例えば、プレート２０の形状に関して、冷却風導入路２４を設けない部分の高さ方向の厚さがより薄く、冷却風導入路２４を設ける部分の高さ方向の厚さがより厚くなるように、プレート２０を形成してもよい。これにより、バッテリセル１２の底面からプレート下方空間２８へと放出される熱量が増加する一方、バッテリセル１２の底面からプレート２０に伝えられた熱が冷却風導入路２４に伝わり難くなるため、冷却風の温度上昇を更に抑制することができる。   It is preferable that the battery module 10 has a configuration in which more heat transferred from the battery cell 12 to the plate 20 is released to a space other than the cooling air introduction path 24. For example, with respect to the shape of the plate 20, the thickness in the height direction of the portion where the cooling air introduction path 24 is not provided is thinner, and the thickness in the height direction of the portion where the cooling air introduction path 24 is provided is thicker. The plate 20 may be formed. As a result, the amount of heat released from the bottom surface of the battery cell 12 to the plate lower space 28 is increased, while the heat transmitted from the bottom surface of the battery cell 12 to the plate 20 is not easily transmitted to the cooling air introduction path 24. Wind temperature rise can be further suppressed.

また、プレート２０の幅方向の端部のうち冷却風導入路２４を設けていない部分において、バッテリモジュール１０外部に向かう方向に突出するフィンを形成してもよい。このように形成されたフィンは、バッテリモジュール１０外部の空気にさらされて、プレート２０内の熱を放出する。これにより、冷却風導入路２４以外のプレート２０の領域からの放熱量が増加し、冷却風導入路２４に伝わる熱量が相対的に減少するため、冷却風の温度上昇を更に抑制することができる。   Moreover, you may form the fin which protrudes in the direction which goes outside the battery module 10 in the part which does not provide the cooling wind introduction path 24 among the edge parts of the width direction of the plate 20. The fins thus formed are exposed to the air outside the battery module 10 and release the heat in the plate 20. As a result, the amount of heat released from the region of the plate 20 other than the cooling air introduction path 24 is increased, and the amount of heat transmitted to the cooling air introduction path 24 is relatively reduced, so that the temperature rise of the cooling air can be further suppressed. .

バッテリモジュール１０は、送風機を設けて、プレート下方空間２８の空気とバッテリモジュール１０の外部の新鮮な空気との交換を容易にする構成を有してもよい。これにより、プレート２０の下面２２からの放熱効率がより一層向上し、バッテリセル１２から冷却風導入路２４に伝わる熱量が減少するため、冷却風の温度上昇を更に抑制することができる。   The battery module 10 may have a configuration in which a blower is provided to facilitate exchange of air in the plate lower space 28 and fresh air outside the battery module 10. Thereby, the heat dissipation efficiency from the lower surface 22 of the plate 20 is further improved, and the amount of heat transmitted from the battery cell 12 to the cooling air introduction path 24 is reduced, so that the temperature rise of the cooling air can be further suppressed.

本実施形態に係るバッテリモジュール１０において、プレート２０が設けられた下面２２以外の上面及び側面の構成は特に制限されないが、バッテリセル１２間を通過する冷却風の整流の観点から、バッテリモジュール１０の上面及び側面を覆うケースを設け、さらに、バッテリモジュール１０の上面側に、バッテリセル１２間を通過した冷却風を導いて車室内等へと排出する排気部材を設けることが好ましい。この場合、図２に示すプレート２０がケースの底部を構成してもよい。   In the battery module 10 according to the present embodiment, the configurations of the upper surface and the side surface other than the lower surface 22 provided with the plate 20 are not particularly limited, but from the viewpoint of rectification of the cooling air passing between the battery cells 12, It is preferable to provide a case that covers the upper surface and the side surface, and further to provide an exhaust member on the upper surface side of the battery module 10 that guides the cooling air that has passed between the battery cells 12 and discharges it to the passenger compartment. In this case, the plate 20 shown in FIG. 2 may constitute the bottom of the case.

上記排気部材としては、例えば、バッテリセル１２間ごとに排気溝と排気導出路とを設けた、本実施形態に係るプレート２０と対応する構成を有する排気側プレートであってもよい。このような排気側プレートは、バッテリセル１２の上面等から受け取る熱量を低減でき、また、バッテリセル１２間から排出された排気が再度バッテリセル１２間に流入することを回避できるため、好ましい。また、バッテリモジュール１０の上面とケースの上部とで囲まれた空間により形成される排気チャンバ、及び、排気チャンバ内の排気を外部へと導く排気ダクトで構成される排気部材を設けてもよい。排気チャンバ及び排気ダクトで構成された排気部材は、圧力損失低減の観点から好ましい。   The exhaust member may be, for example, an exhaust side plate having a configuration corresponding to the plate 20 according to the present embodiment, in which an exhaust groove and an exhaust lead-out path are provided for each battery cell 12. Such an exhaust side plate is preferable because it can reduce the amount of heat received from the upper surface of the battery cell 12 and the like, and the exhaust discharged from between the battery cells 12 can be prevented from flowing between the battery cells 12 again. Further, an exhaust member formed by an exhaust chamber formed by a space surrounded by the upper surface of the battery module 10 and the upper portion of the case, and an exhaust duct that guides the exhaust in the exhaust chamber to the outside may be provided. An exhaust member composed of an exhaust chamber and an exhaust duct is preferable from the viewpoint of reducing pressure loss.

１０ バッテリモジュール、１２ バッテリセル、１４ 隙間、１６ 取付点、２０ プレート、２２ 下面、２４ 冷却風導入路、２６ 冷却溝、２８ プレート下方空間、３０ 第１プレート、３２ 第２プレート、３４ 仕切板、４０ 吸気ダクト、４２ 吸気チャンバ。
10 battery modules, 12 battery cells, 14 gaps, 16 attachment points, 20 plates, 22 lower surface, 24 cooling air introduction path, 26 cooling grooves, 28 plate lower space, 30 first plate, 32 second plate, 34 partition plate, 40 intake duct, 42 intake chamber.

Claims (1)

プレートと、前記プレート上に隙間を空けて積層するように固定された複数のバッテリセルと、を備えるバッテリモジュールであって、
前記プレートには、前記隙間に対向して冷却溝が前記バッテリセル間ごとに設けられ、
前記プレートの下面には、前記冷却溝に対して開口する冷却風導入路が設けられ、
前記バッテリセルを冷却する冷却風が、前記冷却風導入路から流入し、前記冷却溝を通って前記バッテリセル間に導かれる、
バッテリモジュール。
A battery module comprising a plate and a plurality of battery cells fixed so as to be stacked on the plate with a gap therebetween,
In the plate, a cooling groove is provided between the battery cells so as to face the gap,
A cooling air introduction path that opens to the cooling groove is provided on the lower surface of the plate,
Cooling air that cools the battery cells flows from the cooling air introduction path, and is guided between the battery cells through the cooling groove.
Battery module.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113067077A (en) * 2021-03-27 2021-07-02 安徽相成新能源科技有限公司 Power battery thermal management system
WO2023173968A1 (en) * 2022-03-15 2023-09-21 宁德时代新能源科技股份有限公司 Heat dissipation mechanism, battery module and electric device
WO2024093026A1 (en) * 2022-10-31 2024-05-10 宁德时代新能源科技股份有限公司 Isolation plate, isolation plate assembly, battery module, battery pack, and electric device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113067077A (en) * 2021-03-27 2021-07-02 安徽相成新能源科技有限公司 Power battery thermal management system
WO2023173968A1 (en) * 2022-03-15 2023-09-21 宁德时代新能源科技股份有限公司 Heat dissipation mechanism, battery module and electric device
WO2024093026A1 (en) * 2022-10-31 2024-05-10 宁德时代新能源科技股份有限公司 Isolation plate, isolation plate assembly, battery module, battery pack, and electric device

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