JP2018056094A - Battery pack - Google Patents

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Publication number
JP2018056094A
JP2018056094A JP2016194738A JP2016194738A JP2018056094A JP 2018056094 A JP2018056094 A JP 2018056094A JP 2016194738 A JP2016194738 A JP 2016194738A JP 2016194738 A JP2016194738 A JP 2016194738A JP 2018056094 A JP2018056094 A JP 2018056094A
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Prior art keywords
battery pack
housing
lower housing
casing
surface portion
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正剛 福家
Masatake Fukuya
正剛 福家
阿部　健太郎
Kentaro Abe
健太郎 阿部
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Hitachi Astemo Ltd
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Hitachi Automotive Systems Ltd
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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 provide a housing structure of a battery pack capable of preventing a joint point with a vehicle from biting into inside due to an external input.SOLUTION: Disclosed battery pack includes: a housing constituted of an upper housing and a lower housing; a battery module mounted onto the lower housing and enclosed by the housing. The lower housing is a plate-like member, the upper housing has a an upper plane portion and a side face portion. The side face has a plane inclined with respect to the lower housing.SELECTED DRAWING: Figure 2

Description

電池パックの筐体構造に関する。   The present invention relates to a battery pack housing structure.

現在、リチウムイオン電池の電池パックはハイブリッド自動車、電気自動車やプラグインハイブリットカーに搭載するため、高容量化の傾向がある。電池パックを高容量化しようとすると、電池重量が重くなり、車体に載せた際の振動の影響を抑えるための構造を検討する必要がある。   Currently, battery packs for lithium-ion batteries are mounted on hybrid cars, electric cars, and plug-in hybrid cars, so there is a tendency to increase capacity. When trying to increase the capacity of the battery pack, the battery weight increases, and it is necessary to examine a structure for suppressing the influence of vibration when the battery pack is placed on the vehicle body.

特許文献１は電池パックの筐体構造について記載されており、特に、「パックケース３は、内部の空間を包囲する複数の壁からなる箱形を呈し、例えばアルミニウム板または鉄板の成型品で形成される。パックケース３は、例えば、６面（例えば、側壁３２、３３を含む４つの側壁、天壁３０、底壁３１を含む）を有するケースである。対向する側壁は、２組あり、各組の側壁は、他の組の側壁に対して直交する関係にある。天壁３０と底壁３１は、対向する面をなし、２組の側壁に対して直交する。」と記載されている。   Patent Document 1 describes a casing structure of a battery pack. In particular, “pack case 3 has a box shape composed of a plurality of walls surrounding an internal space, and is formed of, for example, a molded product of an aluminum plate or an iron plate. The pack case 3 is a case having, for example, six surfaces (for example, four side walls including the side walls 32 and 33, the top wall 30 and the bottom wall 31). The side walls of each set are orthogonal to the other sets of side walls. The top wall 30 and the bottom wall 31 form opposing surfaces and are orthogonal to the two sets of side walls. Yes.

特開２０１５−２２２７０１号公報Japanese Patent Laying-Open No. 2015-222701

この特許文献1には、電池パックの筐体は側面と底面が直交していると記載されている。しかし、衝突等の外部入力により電池パックを搭載した車両が変形して、電池パックまでその変形が及ぶと、外部入力と直交する側の筐体の根元に応力が集中する。言い換えると、筐体の直交方向への耐力は板厚分のみのため、変形しやすい。結果、外部入力の影響で電池パックを車両に締結する箇所が水平方向に変形し、電池パック内部に食い込む。食い込み量によっては電池が短絡する場合があり、発煙や発火を招く恐れがある。   Patent Document 1 describes that the side surface and the bottom surface of the battery pack housing are orthogonal to each other. However, when the vehicle on which the battery pack is mounted is deformed by an external input such as a collision and the deformation reaches the battery pack, stress is concentrated on the base of the casing on the side orthogonal to the external input. In other words, since the proof stress in the orthogonal direction of the housing is only the thickness of the plate, it easily deforms. As a result, the location where the battery pack is fastened to the vehicle is deformed in the horizontal direction due to the influence of the external input, and bites into the battery pack. Depending on the amount of bite, the battery may be short-circuited, which may cause smoke or fire.

本発明の目的は、車両との締結箇所が外部入力により電池パック内部に食い込むことを抑制する筐体構造を提供する。   The objective of this invention provides the housing structure which suppresses that the fastening location with a vehicle bites into the inside of a battery pack by external input.

上記課題を解決するため、本発明に記載の電池パックは、上筐体と下筐体で構成される筐体と、筐体に収納され、下筐体に搭載される電池モジュールと、を備え、下筐体は、平板状の板状部材であり、上筐体は上面部と側面部を有し、側面部は下筐体に対して傾斜した面を有する。   In order to solve the above-described problem, a battery pack according to the present invention includes a casing composed of an upper casing and a lower casing, and a battery module housed in the casing and mounted on the lower casing. The lower housing is a flat plate-like member, the upper housing has an upper surface portion and a side surface portion, and the side surface portion has a surface inclined with respect to the lower housing.

本発明によれば、外力による変形を筐体の板厚のみで受けなくなり、筐体全体で受けるようになり応力集中を緩和することで変形のしづらい電池パックを提供することができる。
上記した以外の課題、構成及び効果は、以下の実施形態の説明により明らかにされる。 According to the present invention, it is possible to provide a battery pack that is not easily deformed by reducing deformation due to external force only by the plate thickness of the housing, and being received by the entire housing and reducing stress concentration.
Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

本発明の第１の実施形態に係る電池パックの斜視図The perspective view of the battery pack which concerns on the 1st Embodiment of this invention. 本発明が搭載された電池パックの車両締結箇所でカットした断面図Sectional drawing cut at the vehicle fastening part of the battery pack on which the present invention is mounted 図１に示す電池パックに搭載される電池モジュールの斜視図The perspective view of the battery module mounted in the battery pack shown in FIG. 図１に示す電池パックの上筐体を外した状態の正面図The front view of the state which removed the upper housing | casing of the battery pack shown in FIG.

以下、図面を用いて実施例を説明する。   Embodiments will be described below with reference to the drawings.

《実施例１》
以下、本発明の一実施例について、図１から図４を用いて説明する。図１は、本発明の第１の実施形態に係る電池パック４の上筐体１と下筐体２の分割位置を示す斜視図である。図１の電池パック４は、上筐体１と下筐体２を有する。上筐体１は、筐体側面１ｂが斜面になっており、絞り加工された板金の場合は抜き勾配も兼ねる。下筐体２は平板板金になっており、貫通穴である車両締結点２１を有する。電池パック４を搭載した車両は、電池パック４と車両締結点２１で締結される。また、電池パック４内部で結線された線材５は、斜面１１の内側に配置される。この線材５は、例えば電池の情報通信等に使用される。 Example 1
An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view showing the division positions of the upper housing 1 and the lower housing 2 of the battery pack 4 according to the first embodiment of the present invention. The battery pack 4 in FIG. 1 has an upper housing 1 and a lower housing 2. The upper casing 1 has an inclined side face 1b, and also serves as a draft in the case of a drawn sheet metal. The lower housing 2 is a flat sheet metal and has a vehicle fastening point 21 that is a through hole. A vehicle equipped with the battery pack 4 is fastened to the battery pack 4 at a vehicle fastening point 21. Further, the wire 5 connected inside the battery pack 4 is disposed inside the slope 11. This wire 5 is used for battery information communication, for example.

この電池パック４は下筐体２に上筐体１を乗せて、締結することで電池パック４を封止する構造となる。外観図からわかるように上筐体１は、上面部１ａ、上面部１ａから繋がる側面部１ｂからなる。この側面部１ｂは、下筐体２に対して垂直に配置されるのではなく、傾斜して配置される構造となっている。本実施例ではこの側面部１ｂが全周渡って下筐体２に対して傾斜している構造が一つ特徴的な点となっている。   The battery pack 4 has a structure in which the upper case 1 is placed on the lower case 2 and fastened to seal the battery pack 4. As can be seen from the external view, the upper housing 1 includes an upper surface portion 1a and a side surface portion 1b connected to the upper surface portion 1a. The side surface portion 1b is not disposed perpendicularly to the lower housing 2, but is inclined. In the present embodiment, one characteristic point is that the side surface portion 1b is inclined with respect to the lower housing 2 over the entire circumference.

図２は、図１のＡ−Ａ断面であり、本発明が搭載される電池パック４の筐体構造の全様を示す断面図である。この図で示す通り、上筐体１の側面１ｂは下筐体２に対して傾斜する構造となっている。そのため、外力による変形を筐体の板厚のみで受けなくなり、筐体全体で受けることが可能となり、応力集中を緩和することで変形のしづらい電池パックを提供することができる。   FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 and showing the entire case structure of the battery pack 4 on which the present invention is mounted. As shown in this figure, the side surface 1 b of the upper housing 1 is inclined with respect to the lower housing 2. Therefore, the deformation due to the external force is not received only by the thickness of the casing, and it can be received by the entire casing, and the battery pack that is difficult to be deformed can be provided by reducing the stress concentration.

一方で、電池モジュール３は略直方体形状であるため、上筐体１の側面部１ｂが傾斜したことにより、デッドスペースが生まれることとなる。本発明では、その生まれたデッドスペースに線材５を配置することで、デッドスペースをうまく利用して耐震性が高い構造で小型化することが出来る。   On the other hand, since the battery module 3 has a substantially rectangular parallelepiped shape, a dead space is created when the side surface portion 1b of the upper housing 1 is inclined. In the present invention, by arranging the wire 5 in the dead space where it was born, the dead space can be used effectively to reduce the size with a high earthquake resistance structure.

また、図２に示す通り、本発明では、上筐体１の側面部１ｂ１と１ｂ２で傾斜角度を変える構造としている。このような構造にすることによって、重心によって耐震性に対する強さを変更することが出来る。つまり、より振動に弱い部分については側面１ｂ２のように下筐体２に対する角度を大きくし（垂直に近い構造とし）、耐震性を上げ、配線スペース等の確保が必要な場合には側面１ｂ１のように下筐体２に対する角度を小さくし（水平に近い構造とし）スペースを確保する構造としている。   Further, as shown in FIG. 2, in the present invention, the inclination angle is changed between the side surface portions 1 b 1 and 1 b 2 of the upper housing 1. By adopting such a structure, the strength against earthquake resistance can be changed by the center of gravity. That is, for the portion that is more susceptible to vibration, the angle with respect to the lower housing 2 is increased as in the side surface 1b2 (with a structure close to the vertical), the seismic resistance is increased, and when securing the wiring space or the like is required, In this way, the angle with respect to the lower housing 2 is reduced (a structure close to horizontal) to ensure a space.

図３は電池モジュール３を拡大した図である。この電池モジュールは角形の電池セル３１を複数個積層させたものから形成されている。続いて、図４について説明する。図４は上筐体１を下筐体２から外して、図１のＢ方向から見た図である。図３で示した電池モジュール３は２つ並列となる状態で下筐体２上に配置される。また、上筐体１の側面部１ｂが傾斜しているため、下筐体２の端部から離れた位置に配置される。   FIG. 3 is an enlarged view of the battery module 3. This battery module is formed by stacking a plurality of rectangular battery cells 31. Next, FIG. 4 will be described. FIG. 4 is a view when the upper housing 1 is removed from the lower housing 2 and viewed from the direction B in FIG. The two battery modules 3 shown in FIG. 3 are arranged on the lower housing 2 in a state of being arranged in parallel. Further, since the side surface portion 1 b of the upper housing 1 is inclined, it is disposed at a position away from the end portion of the lower housing 2.

なお、本発明では上筐体１のすべての側面部１ｂを傾斜構造とした。このような構造にすることによって、最も耐震性は上がるが、デッドスペースは増えることとなる。そのため、上筐体１のすべての側面部１ｂではなく、一部の側面部１ｂだけを傾斜構造とするのでも良い。   In the present invention, all the side surface parts 1b of the upper housing 1 have an inclined structure. By adopting such a structure, the earthquake resistance is increased most, but the dead space is increased. For this reason, not all of the side surface portions 1b of the upper housing 1 but only a part of the side surface portions 1b may have an inclined structure.

また、本発明は上筐体１を絞り加工で作成した。絞り加工で作成することにより、上面部１ａと側面部１ｂとの間に隙間が無くなるため、より強度が強いものとなる。なお、最も好ましくは絞り加工で作成した上筐体１を用いることが好ましいが、絞り加工以外の加工方法で加工した上筐体１を用いても良い。   In the present invention, the upper housing 1 is formed by drawing. By creating by drawing, there is no gap between the upper surface portion 1a and the side surface portion 1b, so that the strength becomes stronger. Although it is most preferable to use the upper casing 1 created by drawing, the upper casing 1 processed by a processing method other than drawing may be used.

以上、簡単に本発明をまとめる。本発明に記載の電池パックは、上筐体と下筐体で構成される筐体と、筐体に収納され、下筐体に搭載される電池モジュールと、を備え、下筐体は、平板状の板状部材であり、上筐体は上面部と側面部を有し、側面部は下筐体に対して傾斜した面を有する。このような構成にすることによって、外力による変形を筐体の板厚のみで受けなくなり、筐体全体で受けるようになり応力集中を緩和することで変形のしづらい電池パックを提供することができる。   The present invention will be briefly summarized as described above. A battery pack according to the present invention includes a casing composed of an upper casing and a lower casing, and a battery module housed in the casing and mounted on the lower casing. The upper housing has an upper surface portion and a side surface portion, and the side surface portion has a surface inclined with respect to the lower housing. By adopting such a configuration, it is possible to provide a battery pack that is not easily deformed by reducing the stress concentration because the deformation due to external force is not received only by the thickness of the housing but is received by the entire housing. .

また、本発明に記載の電池パックは、傾斜した面が上筐体の側面部の全周にわたって形成される。このような構成にすることによって、より耐震性が高い電池パックを提供することが可能となる。   In the battery pack according to the present invention, the inclined surface is formed over the entire circumference of the side surface portion of the upper housing. By adopting such a configuration, it is possible to provide a battery pack with higher earthquake resistance.

また、本発明に記載の電池パックは、側面部が傾斜角の異なる側面部を有する。このような構成にすることによって、振動に弱い部分については下筐体に対する角度を大きくし、耐震性を上げ、配線スペース等の確保が必要な場合には下筐体２に対する角度を小さくしスペースを確保する構造とすることができる。   In the battery pack according to the present invention, the side portion has side portions with different inclination angles. By adopting such a configuration, the angle with respect to the lower housing 2 is increased for the parts that are susceptible to vibration, the seismic resistance is increased, and when the wiring space or the like needs to be secured, the angle with respect to the lower housing 2 is reduced. It can be set as the structure which ensures.

また、本発明に記載の電池パックは、傾斜した側面部と電池パックとの間には線材が配置される。このような構成とすることによって、デッドスペースをうまく利用して耐震性が高い構造で小型化することが出来る。   In the battery pack according to the present invention, a wire is arranged between the inclined side surface portion and the battery pack. By adopting such a configuration, it is possible to reduce the size with a structure having high earthquake resistance by making good use of the dead space.

また、本発明に記載の電池パックは、上筐体が絞り加工で作成されている。このような構成にすることによって、上筐体を隙間の無い構造とすることができ、より耐震性を向上させることができる。   Further, in the battery pack described in the present invention, the upper housing is formed by drawing. By adopting such a configuration, the upper housing can be structured without a gap, and the earthquake resistance can be further improved.

以上、本発明の実施例について詳述したが、本発明は、前記の実施例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本発明の精神を逸脱しない範囲で、種々の設計変更を行うことができるものである。例えば、前記した実施の形態は本発明を分かりやすく説明するために詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。また、ある実施例の構成の一部を他の実施例の構成に置き換えることが可能であり、また、ある実施例の構成に他の実施例の構成を加えることも可能である。さらに、各実施例の構成の一部について、他の構成の追加・削除・置換をすることが可能である。   Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Furthermore, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

１・・・上筐体
１ａ・・・上筐体の上面
１ｂ・・・上筐体の側面
２・・・下筐体
２１・・・車両締結点
３・・・電池モジュール
４・・・電池パック
５・・・線材
３１・・・電池セル
DESCRIPTION OF SYMBOLS 1 ... Upper housing | casing 1a ... Upper surface 1b of upper housing | casing ... Side surface 2 of upper housing | casing ... Lower housing | casing 21 ... Vehicle fastening point 3 ... Battery module 4 ... Battery Pack 5 ... Wire 31 ... Battery cell

Claims (5)

上筐体と下筐体で構成される筐体と、
前記筐体に収納され、前記下筐体に搭載される電池モジュールと、を備えた電池パックにおいて、
前記下筐体は、平板状の板状部材であり、
前記上筐体は、上面部と側面部を有し、
前記側面部は、前記下筐体に対して傾斜した面を有することを特徴とする電池パック。 A housing composed of an upper housing and a lower housing;
In a battery pack comprising the battery module housed in the housing and mounted on the lower housing,
The lower housing is a flat plate-like member,
The upper housing has an upper surface portion and a side surface portion,
The battery pack according to claim 1, wherein the side portion has a surface inclined with respect to the lower housing. 請求項１に記載の電池パックにおいて、
前記傾斜した面は、前記上筐体の側面部の全周にわたって形成されることを特徴とする電池パック。 The battery pack according to claim 1,
The inclined surface is formed over the entire circumference of the side surface of the upper housing. 請求項２に記載の電池パックにおいて、
前記側面部は傾斜角の異なる側面部を有することを特徴とする電池パック。 The battery pack according to claim 2,
The battery pack according to claim 1, wherein the side portion has side portions having different inclination angles. 請求項１乃至３のいずれかに記載の電池パックにおいて、
前記傾斜した側面部と電池パックとの間には線材が配置されることを特徴とする電池パック。 The battery pack according to any one of claims 1 to 3,
A battery pack, wherein a wire rod is disposed between the inclined side surface portion and the battery pack. 請求項１乃至４のいずれかに記載の電池パックにおいて、
前記上筐体は絞り加工で作成されていることを特徴とする電池パック。 The battery pack according to any one of claims 1 to 4,
The battery pack is characterized in that the upper casing is made by drawing.
JP2016194738A 2016-09-30 2016-09-30 Battery pack Pending JP2018056094A (en)

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