WO2019181630A1 - Battery pack - Google Patents
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- WO2019181630A1 WO2019181630A1 PCT/JP2019/009856 JP2019009856W WO2019181630A1 WO 2019181630 A1 WO2019181630 A1 WO 2019181630A1 JP 2019009856 W JP2019009856 W JP 2019009856W WO 2019181630 A1 WO2019181630 A1 WO 2019181630A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/643—Cylindrical cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/222—Inorganic material
- H01M50/224—Metals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Aviation & Aerospace Engineering (AREA)
- Inorganic Chemistry (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
This battery pack (10a) is provided with a case (12a) in which a plurality of battery core packs (14, 16) are contained. The case (12a) comprises an outer frame (40) and a partition wall (42) which is integrally continuous with the outer frame (40) and defines a hollow interior of the case (12a) into a plurality of inner compartments (44, 46). The plurality of battery core packs (14, 16) are separately contained in the plurality of inner compartments (44, 46).
Description
本発明は、複数個のバッテリコアパックがケースに収容されて構成されるバッテリパックに関する。
The present invention relates to a battery pack configured by housing a plurality of battery core packs in a case.
電動アシスト自転車や電動バイク等の電動車両には、バッテリパックが着脱可能に搭載される。この種のバッテリパックは、複数個の単セルを有するバッテリコアパックがケースの中空内部に収容されることで構成されている。単セルは、例えば、リチウム二次電池であり、容量がある程度まで低下すると充電がなされる。これにより容量が回復し、再放電が可能となる。
Battery packs are detachably mounted on electric vehicles such as electric assist bicycles and electric motorcycles. This type of battery pack is configured by housing a battery core pack having a plurality of single cells inside a hollow case. The single cell is, for example, a lithium secondary battery, and is charged when the capacity is reduced to a certain level. As a result, the capacity is recovered and re-discharge is possible.
二次電池は、充放電に伴って電極反応が生起されることで発熱する。このため、バッテリパックは、放熱を促進するための放熱部材を含んで構成される。例えば、特開２００９－１７６６８９号公報記載の技術では、バッテリコアパックの側面とケースの内壁との間に、放熱部材としての弾性熱伝導シートを介挿するようにしている（特に段落［００２５］参照）。放熱シートとしては、弾性に富みバッテリコアパックとケースに挟まれて圧縮した状態を維持するものが用いられる。これにより、バッテリコアパックの側面とケースの内壁との両方に弾性熱伝導シートが密着する。従って、単セルの熱が弾性熱伝導シートを介してケースに効率的に伝熱されるので、バッテリパックの放熱性が向上する。
The secondary battery generates heat when an electrode reaction occurs with charge / discharge. For this reason, a battery pack is comprised including the heat radiating member for promoting heat dissipation. For example, in the technique described in Japanese Patent Application Laid-Open No. 2009-176589, an elastic heat conductive sheet as a heat radiating member is interposed between the side surface of the battery core pack and the inner wall of the case (particularly, paragraph [0025] reference). As the heat dissipating sheet, a sheet that is rich in elasticity and that is sandwiched between the battery core pack and the case and maintains a compressed state is used. Thereby, an elastic heat conductive sheet closely_contact | adheres to both the side surface of a battery core pack, and the inner wall of a case. Therefore, since the heat of the single cell is efficiently transferred to the case via the elastic heat conductive sheet, the heat dissipation of the battery pack is improved.
ケース内に複数個のバッテリコアパックを収容することが想定される。この場合、バッテリコアパックの、ケースの内壁に臨む側面と、前記内壁との間には弾性熱伝導シートが介挿されるが、バッテリコアパックの互いに対向する側面同士の間に弾性熱伝導シートを介挿すると、バッテリコアパック同士の間で伝熱が起こるので、放熱が困難となる。このため、バッテリコアパック同士の間は空間であり、換言すれば、空気層である。
It is assumed that a plurality of battery core packs are accommodated in the case. In this case, an elastic heat conductive sheet is inserted between the side surface of the battery core pack facing the inner wall of the case and the inner wall, but the elastic heat conductive sheet is interposed between the side surfaces facing each other of the battery core pack. If it is inserted, heat transfer occurs between the battery core packs, making it difficult to dissipate heat. Therefore, the space between the battery core packs is a space, in other words, an air layer.
空気層の伝熱効率は良好ではなく、断熱作用を営む。すなわち、ケース内に熱が滞留し易くなる。熱が長時間にわたって滞留すると、単セルが劣化する懸念がある。そこで、ケースの熱容量を大きくしてバッテリコアパックから弾性熱伝導シートを介してのケースへの伝熱を促進することが想起されるが、この場合、ケースの厚みが大きくなり、その結果としてバッテリパックの重量が大となるという不都合を招く。
¡The heat transfer efficiency of the air layer is not good, and it has a heat insulating effect. That is, heat tends to stay in the case. If the heat stays for a long time, the single cell may be deteriorated. Therefore, it is recalled that the heat capacity of the case is increased to promote heat transfer from the battery core pack to the case through the elastic heat conductive sheet. In this case, however, the thickness of the case increases, and as a result, the battery Inconvenience that the weight of the pack becomes large.
本発明の主たる目的は、ケース内に複数個のバッテリコアパックを収容するにも関わらず放熱性が良好なバッテリパックを提供することにある。
The main object of the present invention is to provide a battery pack having good heat dissipation despite housing a plurality of battery core packs in a case.
本発明の別の目的は、重量が大となることを回避し得るバッテリパックを提供することにある。
Another object of the present invention is to provide a battery pack that can avoid an increase in weight.
本発明の一実施形態によれば、複数個の単セルを有するバッテリコアパックと、複数個の前記バッテリコアパックを収容するケースとを備えるバッテリパックであって、
前記ケースは、外枠と、前記外枠に対して一体的に連なり、前記ケースの中空内部を複数個の内室に区画する隔壁とを有し、
前記隔壁により、前記内室が前記バッテリコアパックの個数と同数個で形成され、
個々の前記バッテリコアパックが、個々の前記内室に収容されているバッテリパックが提供される。 According to one embodiment of the present invention, a battery pack comprising a battery core pack having a plurality of single cells, and a case for accommodating the plurality of battery core packs,
The case includes an outer frame, and a partition wall that is integrally connected to the outer frame and partitions a hollow interior of the case into a plurality of inner chambers,
With the partition, the inner chamber is formed in the same number as the number of the battery core packs,
A battery pack is provided in which the individual battery core packs are accommodated in the individual inner chambers.
前記ケースは、外枠と、前記外枠に対して一体的に連なり、前記ケースの中空内部を複数個の内室に区画する隔壁とを有し、
前記隔壁により、前記内室が前記バッテリコアパックの個数と同数個で形成され、
個々の前記バッテリコアパックが、個々の前記内室に収容されているバッテリパックが提供される。 According to one embodiment of the present invention, a battery pack comprising a battery core pack having a plurality of single cells, and a case for accommodating the plurality of battery core packs,
The case includes an outer frame, and a partition wall that is integrally connected to the outer frame and partitions a hollow interior of the case into a plurality of inner chambers,
With the partition, the inner chamber is formed in the same number as the number of the battery core packs,
A battery pack is provided in which the individual battery core packs are accommodated in the individual inner chambers.
この構成では、隣り合うバッテリコアパック同士の間に隔壁が介在する。このため、バッテリコアパックの熱が隔壁を介して外枠に速やかに伝熱され、さらに外枠から外気に放散される。このように、バッテリコアパック同士の間に断熱作用を営む空気層が存在する場合に比して、放熱性が向上する。従って、単セルが劣化する懸念を払拭することができる。
In this configuration, a partition wall is interposed between adjacent battery core packs. For this reason, the heat of the battery core pack is quickly transferred to the outer frame via the partition wall, and further dissipated from the outer frame to the outside air. Thus, heat dissipation improves compared with the case where the air layer which performs heat insulation exists between battery core packs. Therefore, the concern that the single cell deteriorates can be eliminated.
また、隔壁が外枠と一体的に連なっている（換言すれば、ケースは単一部材からなる）ので、ケース、ひいてはバッテリコアパックの部品点数が増加することや、バッテリコアパックの組立工程数が増加すること等が回避される。従って、低コスト化を図りながら、放熱性が良好であり、しかも、重量が大となることを回避し得るバッテリパックを構成することができる。
In addition, since the partition wall is integrally connected to the outer frame (in other words, the case is made of a single member), the number of parts of the case and, consequently, the battery core pack increases, and the number of battery core pack assembly processes. Is increased. Therefore, it is possible to configure a battery pack that has good heat dissipation and can avoid an increase in weight while reducing costs.
バッテリコアパックと、内室の内壁との間には放熱部材を介挿することが好ましい。この場合、バッテリコアパックからケースへの伝熱が放熱シートを介して進行するので、放熱性が一層向上する。
It is preferable to insert a heat dissipation member between the battery core pack and the inner wall of the inner chamber. In this case, heat transfer from the battery core pack to the case proceeds via the heat dissipation sheet, so that heat dissipation is further improved.
また、外枠又は隔壁に、内室に対して平行に延在する中空部を形成することが好ましい。この場合、上記と同様にバッテリコアパックからケースへの伝熱が速やかになされるとともに、ケースの一層の軽量化がなされる。従って、バッテリパックの一層の軽量化を図ることができる。
Further, it is preferable to form a hollow portion extending in parallel with the inner chamber in the outer frame or the partition wall. In this case, heat transfer from the battery core pack to the case is quickly performed as described above, and the case is further reduced in weight. Therefore, the weight of the battery pack can be further reduced.
ケースは、アルミニウム又はアルミニウム合金の押出成形材から構成することが好ましい。この場合、強度に優れ且つ軽量なケースを低コストで得ることができるからである。
The case is preferably composed of an extruded material of aluminum or aluminum alloy. In this case, an excellent strength and lightweight case can be obtained at low cost.
また、ケースの押出方向が前記単セルの長手方向と直交するように、前記バッテリコアパックを内室に収容することが好ましい。単セルの電極端子は、該単セルの長手方向端部である底面に設けられ、且つ電極端子同士はバスバーを介して電気的に接続される。従って、上記した位置関係によれば、発熱体である電極端子、熱伝導体であるバスバーとケースとの距離が近くなる。すなわち、伝熱距離が短くなるので、伝熱効率が向上する。
Further, it is preferable that the battery core pack is accommodated in the inner chamber so that the case extruding direction is orthogonal to the longitudinal direction of the single cell. The electrode terminals of the single cell are provided on the bottom surface, which is the longitudinal end of the single cell, and the electrode terminals are electrically connected to each other through a bus bar. Therefore, according to the above-described positional relationship, the distance between the electrode terminal as the heating element and the bus bar as the heat conductor and the case is reduced. That is, since the heat transfer distance is shortened, the heat transfer efficiency is improved.
本発明によれば、ケースに隔壁を設けて中空内部をバッテリコアパックと同一個数の内室に区画し、且つ各内室にバッテリコアパックを個々に収容するようにしているので、該隔壁が、隣り合うバッテリコアパック同士の間に介在する。このため、バッテリコアパックの熱が隔壁を介して外枠に速やかに伝熱され、さらに外枠から外気に放散される。
According to the present invention, the partition is provided in the case, the hollow interior is partitioned into the same number of inner chambers as the battery core pack, and the battery core pack is individually accommodated in each inner chamber. , Interposed between adjacent battery core packs. For this reason, the heat of the battery core pack is quickly transferred to the outer frame via the partition wall, and further dissipated from the outer frame to the outside air.
すなわち、この構成により、バッテリコアパック同士の間に断熱作用を営む空気層が存在する場合に比して、放熱性を向上させることができる。従って、単セルが劣化する懸念が払拭される。
That is, with this configuration, heat dissipation can be improved as compared with the case where an air layer that performs heat insulation exists between battery core packs. Therefore, the concern that the single cell deteriorates is eliminated.
しかも、隔壁を外枠と一体的に構成するので、バッテリコアパックの部品点数が増加することや、バッテリコアパックの組立工程数が増加することを回避することもできる。
Moreover, since the partition wall is integrally formed with the outer frame, it is possible to avoid an increase in the number of parts of the battery core pack and an increase in the number of assembly steps of the battery core pack.
以下、本発明に係るバッテリパックにつき好適な実施の形態を挙げ、添付の図面を参照して詳細に説明する。
Hereinafter, preferred embodiments of the battery pack according to the present invention will be described and described in detail with reference to the accompanying drawings.
図１及び図２は、それぞれ、本実施の形態に係るバッテリパック１０ａの概略全体斜視図、概略分解斜視図である。なお、バッテリパック１０ａの構成についての理解を容易にするべく、図１及び図２ではバッテリパック１０ａを横臥姿勢としているが、バッテリパック１０ａは主に、長手方向が重力方向に沿って延在する姿勢、又は、長手方向が重力方向に対して傾斜した姿勢で用いられる。
1 and 2 are a schematic overall perspective view and a schematic exploded perspective view of a battery pack 10a according to the present embodiment, respectively. In order to facilitate understanding of the configuration of the battery pack 10a, the battery pack 10a is in a recumbent posture in FIGS. 1 and 2, but the battery pack 10a mainly extends in the longitudinal direction along the direction of gravity. It is used in a posture or a posture in which the longitudinal direction is inclined with respect to the direction of gravity.
このバッテリパック１０ａは、両端が開口した中空四角柱形状のケース１２ａと、該ケース１２ａの中空内部に収容される第１バッテリコアパック１４、第２バッテリコアパック１６とを有する。この中、ケース１２ａの底側の開口はボトムケース１８で閉塞され、天井側の開口はトップケース２０で閉塞される。ボトムケース１８には、第１バッテリコアパック１４、第２バッテリコアパック１６に対して充放電を行うためのコネクタ２２が設けられる。一方、トップケース２０には、ユーザがバッテリパック１０ａを持ち上げたり、搬送したりするときに把持するための取っ手２４がアーチ形状に形成される。
The battery pack 10a includes a hollow quadrangular prism-shaped case 12a that is open at both ends, and a first battery core pack 14 and a second battery core pack 16 that are accommodated inside the hollow of the case 12a. Among these, the opening on the bottom side of the case 12 a is closed by the bottom case 18, and the opening on the ceiling side is closed by the top case 20. The bottom case 18 is provided with a connector 22 for charging and discharging the first battery core pack 14 and the second battery core pack 16. On the other hand, the top case 20 is formed with an arch shape with a handle 24 for gripping the user when lifting or transporting the battery pack 10a.
第１バッテリコアパック１４は、複数の単セル３０が第１セルホルダ３２に保持されることで構成される。この場合、単セル３０は円柱形状をなし、軸方向の両端部に正極端子、負極端子（いずれも図示せず）がそれぞれ設けられている。単セル３０の好適な例としてはリチウムイオン二次電池が挙げられるが、特にこれに限定されるものではなく、ニッケル水素電池やニッケルカドミウム電池等、他の二次電池であってもよい。
The first battery core pack 14 is configured by holding a plurality of single cells 30 in a first cell holder 32. In this case, the single cell 30 has a cylindrical shape, and is provided with a positive electrode terminal and a negative electrode terminal (both not shown) at both ends in the axial direction. Although a lithium ion secondary battery is mentioned as a suitable example of the single cell 30, it is not specifically limited to this, Other secondary batteries, such as a nickel metal hydride battery and a nickel cadmium battery, may be sufficient.
第１セルホルダ３２には、複数個の収容孔３４が、単セル３０の直径及び高さに対応する直径及び長さで貫通形成されており、単セル３０は各収容孔３４に個別に挿入されて保持されている。第２バッテリコアパック１６も第１バッテリコアパック１４と同様に、収容孔３４が形成された第２セルホルダ３６を有し、前記収容孔３４に単セル３０が保持されることで構成されている。また、第１バッテリコアパック１４、第２バッテリコアパック１６は、単セル３０が、その長手方向がバッテリパック１０ａの上下方向に対して直交する姿勢となるようにしてケース１２ａ内に収容される。長手方向の端面である両底面には、正極端子、負極端子がそれぞれ設けられる。
The first cell holder 32 is formed with a plurality of receiving holes 34 penetrating with a diameter and length corresponding to the diameter and height of the single cell 30. The single cell 30 is inserted into each receiving hole 34 individually. Is held. Similarly to the first battery core pack 14, the second battery core pack 16 has a second cell holder 36 in which a housing hole 34 is formed, and is configured by holding the single cell 30 in the housing hole 34. . The first battery core pack 14 and the second battery core pack 16 are accommodated in the case 12a so that the single cell 30 is in a posture in which the longitudinal direction is orthogonal to the vertical direction of the battery pack 10a. . A positive electrode terminal and a negative electrode terminal are respectively provided on both bottom surfaces which are end surfaces in the longitudinal direction.
収容孔３４は、第１セルホルダ３２、第２セルホルダ３６の横方向（図２における縦方向）に沿って並列される。以下、横方向に並ぶ収容孔３４によって形成される一列を「収容孔列」と表記し、その参照符号を３７とすると、第１バッテリコアパック１４の任意の収容孔列３７では、単セル３０は、例えば、正極端子が第２バッテリコアパック１６を臨むようにして収容孔３４に収容される。また、該収容孔列３７に隣接する別の収容孔列３７では、これとは逆に、単セル３０が、負極端子が第２バッテリコアパック１６を臨むようにして収容孔３４に収容される。この交互配置が繰り返されるので、隣接する収容孔列３７では、逆極性の電極端子が同一方向を臨む。
The accommodation holes 34 are juxtaposed along the lateral direction of the first cell holder 32 and the second cell holder 36 (vertical direction in FIG. 2). Hereinafter, a single row formed by the accommodation holes 34 arranged in the horizontal direction is referred to as an “accommodation hole row”, and the reference numeral 37 is a single cell 30 in an arbitrary accommodation hole row 37 of the first battery core pack 14. For example, the positive terminal is accommodated in the accommodation hole 34 so as to face the second battery core pack 16. On the other hand, in another accommodation hole row 37 adjacent to the accommodation hole row 37, the single cell 30 is housed in the accommodation hole 34 so that the negative electrode terminal faces the second battery core pack 16. Since this alternate arrangement is repeated, in the adjacent accommodation hole row 37, the opposite polarity electrode terminals face the same direction.
そして、任意の収容孔列３７の正極端子と、これに隣接する別の収容孔列３７の負極端子とが、同一のバスバー３８によって電気的に直列接続される。第２バッテリコアパック１６においても同様である。第１バッテリコアパック１４の最下の収容孔列３７内の単セル３０と、第２バッテリコアパック１６の最下の収容孔列３７内の単セル３０とを接続するバスバー３８は、ボトムケース１８に臨む部位が湾曲した形状で第１バッテリコアパック１４と第２バッテリコアパック１６の間のクリアランスから突出している。
Then, the positive terminal of an arbitrary accommodation hole row 37 and the negative terminal of another accommodation hole row 37 adjacent thereto are electrically connected in series by the same bus bar 38. The same applies to the second battery core pack 16. The bus bar 38 that connects the single cell 30 in the lowermost accommodation hole row 37 of the first battery core pack 14 and the single cell 30 in the lowermost accommodation hole row 37 of the second battery core pack 16 has a bottom case. The portion facing 18 is curved and protrudes from the clearance between the first battery core pack 14 and the second battery core pack 16.
第１バッテリコアパック１４及び第２バッテリコアパック１６を収容するケース１２ａは、外枠４０と、該外枠４０に対して一体的に連なる隔壁４２とを有する。隔壁４２は、ケース１２ａの上下方向に沿って延在し、該ケース１２ａの中空内部を、略同一容積の第１内室４４と第２内室４６に区画している。このようなケース１２ａは、例えば、アルミニウム又はアルミニウム合金からなる素材に対して押出成形を施すことで作製される。この場合、ケース１２ａは、強度に優れるとともに軽量であり、且つ熱伝導度が高いために伝熱効率に優れる。しかも、安価であるので、ケース１２ａを低コストで得ることができる。
The case 12 a that accommodates the first battery core pack 14 and the second battery core pack 16 includes an outer frame 40 and a partition wall 42 that is integrally connected to the outer frame 40. The partition wall 42 extends along the vertical direction of the case 12a, and divides the hollow interior of the case 12a into a first inner chamber 44 and a second inner chamber 46 having substantially the same volume. Such a case 12a is produced, for example, by performing extrusion molding on a material made of aluminum or an aluminum alloy. In this case, the case 12a is excellent in strength, light in weight, and high in heat conductivity, and thus excellent in heat transfer efficiency. And since it is cheap, the case 12a can be obtained at low cost.
そして、このケース１２ａにおいて、第１バッテリコアパック１４は第１内室４４に収容され、且つ第２バッテリコアパック１６は第２内室４６に収容されている。すなわち、本実施の形態において、ケース１２ａの中空内部は、隔壁４２によってバッテリコアパックの個数と同一個数の内室に区画されており、且つ各バッテリコアパック（第１バッテリコアパック１４及び第２バッテリコアパック１６）は、各内室（第１内室４４及び第２内室４６）に個別に収容される。
In the case 12a, the first battery core pack 14 is accommodated in the first inner chamber 44, and the second battery core pack 16 is accommodated in the second inner chamber 46. That is, in the present embodiment, the hollow interior of the case 12a is partitioned into the same number of inner chambers as the number of battery core packs by the partition walls 42, and each battery core pack (the first battery core pack 14 and the second battery core pack 14). The battery core pack 16) is individually accommodated in each inner chamber (the first inner chamber 44 and the second inner chamber 46).
なお、押出成形時の押出方向は、隔壁４２の延在方向である。すなわち、本実施の形態では、第１バッテリコアパック１４及び第２バッテリコアパック１６は、ケース１２ａの押出方向が単セル３０の長手方向と直交するようにして第１内室４４、第２内室４６に収容されている。
In addition, the extrusion direction at the time of extrusion molding is the extending direction of the partition wall 42. That is, in the present embodiment, the first battery core pack 14 and the second battery core pack 16 have the first inner chamber 44 and the second inner core 44 such that the pushing direction of the case 12a is orthogonal to the longitudinal direction of the single cell 30. It is accommodated in the chamber 46.
第１バッテリコアパック１４の両側面、すなわち、バスバー３８と、第１内室４４の、バスバー３８に臨む両内壁との間には、放熱部材としての放熱シート５０がそれぞれ介挿される。同様に、第２バッテリコアパック１６の両側面に取り付けられたバスバー３８と、第２内室４６の、バスバー３８に臨む両内壁（外枠４０及び隔壁４２）との間に放熱シート５０がそれぞれ介挿される。放熱シート５０は、弾性に富み且つ第１バッテリコアパック１４又は第２バッテリコアパック１６と、第１内室４４又は第２内室４６の内壁との間で圧縮された状態を維持し得るものが好適に選定される。この場合、放熱シート５０が、第１バッテリコアパック１４又は第２バッテリコアパック１６と、第１内室４４又は第２内室４６の内壁とに対して広面積で密着するからである。
A heat radiating sheet 50 as a heat radiating member is interposed between both side surfaces of the first battery core pack 14, that is, between the bus bar 38 and both inner walls of the first inner chamber 44 facing the bus bar 38. Similarly, the heat radiation sheet 50 is provided between the bus bar 38 attached to both side surfaces of the second battery core pack 16 and the inner walls (the outer frame 40 and the partition wall 42) of the second inner chamber 46 facing the bus bar 38, respectively. Is inserted. The heat radiation sheet 50 is rich in elasticity and can maintain a compressed state between the first battery core pack 14 or the second battery core pack 16 and the inner wall of the first inner chamber 44 or the second inner chamber 46. Is preferably selected. In this case, the heat dissipation sheet 50 is in close contact with the first battery core pack 14 or the second battery core pack 16 and the inner wall of the first inner chamber 44 or the second inner chamber 46 in a wide area.
第１バッテリコアパック１４（第１セルホルダ３２）及び第２バッテリコアパック１６（第２セルホルダ３６）の上面と、トップケース２０との間には、第１バッテリコアパック１４、第２バッテリコアパック１６の温度や電圧を管理するコントロールユニットであるバッテリマネージメントユニット５２（ＢＭＵ）が挿入される。ＢＭＵ５２は、電動車両及び充電装置との通信を行う通信部を兼ねる。
Between the upper surface of the first battery core pack 14 (first cell holder 32) and the second battery core pack 16 (second cell holder 36) and the top case 20, the first battery core pack 14 and the second battery core pack A battery management unit 52 (BMU) which is a control unit for managing the temperature and voltage of 16 is inserted. The BMU 52 also serves as a communication unit that performs communication with the electric vehicle and the charging device.
本実施の形態に係るバッテリパック１０ａは、基本的には以上のように構成されるものであり、次にその作用効果について説明する。
The battery pack 10a according to the present embodiment is basically configured as described above. Next, the function and effect will be described.
バッテリパック１０ａの充電が必要な場合、ユーザは、取っ手２４を把持してバッテリパック１０ａを充電装置に搬送し、コネクタ２２と充電装置の充電端子とを電気的に接続すればよい。これにより、ケース１２ａ内の各単セル３０に対して充電がなされる。充電が終了すると、充電装置に設けられたインジケータの表示が変化することにより、ユーザが「充電終了」を認識することができる。この際、ユーザは、取っ手２４を把持してバッテリパック１０ａを充電装置から離脱させるとともに、例えば、バッテリパック１０ａを電動車両に搭載する。このときにコネクタ２２が電力取出端子に対して電気的に接続され、各単セル３０から電動車両に対して電力が供給される。すなわち、各単セル３０から放電がなされる。
When it is necessary to charge the battery pack 10a, the user may hold the handle 24, transport the battery pack 10a to the charging device, and electrically connect the connector 22 and the charging terminal of the charging device. As a result, each single cell 30 in the case 12a is charged. When the charging is completed, the display of the indicator provided in the charging device is changed, so that the user can recognize “charging completed”. At this time, the user grips the handle 24 to detach the battery pack 10a from the charging device, and mounts the battery pack 10a on the electric vehicle, for example. At this time, the connector 22 is electrically connected to the power extraction terminal, and power is supplied from each single cell 30 to the electric vehicle. In other words, each single cell 30 is discharged.
以上の充放電の過程では、各単セル３０の正極又は負極に所定の酸化反応又は還元反応が生起される。これに伴って各単セル３０が発熱する。この熱が第１セルホルダ３２、第２セルホルダ３６やバスバー３８に伝熱されることにより、第１バッテリコアパック１４、第２バッテリコアパック１６が熱を帯びる。
In the above charging and discharging process, a predetermined oxidation reaction or reduction reaction is caused on the positive electrode or the negative electrode of each single cell 30. Along with this, each single cell 30 generates heat. The heat is transferred to the first cell holder 32, the second cell holder 36, and the bus bar 38, whereby the first battery core pack 14 and the second battery core pack 16 are heated.
ここで、本実施の形態においては、上記したように、第１バッテリコアパック１４及び第２バッテリコアパック１６のそれぞれの両側面と、第１内室４４又は第２内室４６の各内壁との間に放熱シート５０が介挿される。このため、図３に示すように、第１バッテリコアパック１４、第２バッテリコアパック１６の熱は、放熱シート５０を介して直接、又は隔壁４２を介して間接的に外枠４０に伝熱される。
Here, in the present embodiment, as described above, both side surfaces of the first battery core pack 14 and the second battery core pack 16 and the inner walls of the first inner chamber 44 or the second inner chamber 46 The heat dissipation sheet 50 is interposed between the two. For this reason, as shown in FIG. 3, the heat of the first battery core pack 14 and the second battery core pack 16 is transferred directly to the outer frame 40 via the heat dissipation sheet 50 or indirectly via the partition wall 42. It is.
このように、従来技術では第１バッテリコアパック１４、第２バッテリコアパック１６の間に断熱作用を営む空気層が存在するのに対し、本実施の形態では、第１バッテリコアパック１４、第２バッテリコアパック１６の間に隔壁４２が配設されている。この隔壁４２に放熱シート５０を介して第１バッテリコアパック１４、第２バッテリコアパック１６を当接させることができるので、該隔壁４２を介して第１バッテリコアパック１４、第２バッテリコアパック１６の熱を、矢印に従って速やかに外枠４０に伝導させることができる。すなわち、ケース１２ａの中空内部に隔壁４２を設けたことにより、空気層が存在する従来技術に比して放熱性が十分に向上する。このことと、放熱シート５０が第１バッテリコアパック１４、第２バッテリコアパック１６から外枠４０又は隔壁４２に放熱を促進することとが相俟って、単セル３０が熱に起因して劣化する懸念が払拭される。
As described above, in the prior art, there is an air layer that performs heat insulation between the first battery core pack 14 and the second battery core pack 16, whereas in the present embodiment, the first battery core pack 14, the first battery core pack 14, A partition wall 42 is disposed between the two battery core packs 16. Since the first battery core pack 14 and the second battery core pack 16 can be brought into contact with the partition wall 42 through the heat dissipation sheet 50, the first battery core pack 14 and the second battery core pack 16 are installed through the partition wall 42. 16 heat can be quickly conducted to the outer frame 40 according to the arrow. That is, by providing the partition wall 42 inside the hollow of the case 12a, the heat dissipation is sufficiently improved as compared with the conventional technique in which an air layer exists. Combined with this, the heat dissipation sheet 50 promotes heat dissipation from the first battery core pack 14 and the second battery core pack 16 to the outer frame 40 or the partition wall 42, and the single cell 30 is caused by heat. The fear of deterioration is dispelled.
従って、ケース１２ａの熱容量を大きくするために該ケース１２ａを肉厚とする必要がない。このため、ケース１２ａの重量が大となることを有効に回避することができる。
Therefore, it is not necessary to make the case 12a thick in order to increase the heat capacity of the case 12a. For this reason, it can avoid effectively that the weight of case 12a becomes large.
しかも、隔壁４２は外枠４０と一体的に連なる。すなわち、ケース１２ａは単一部材からなる。このようなケース１２ａは押出成形等で作製することができるので、バッテリパック１０ａの部品点数が増加することや、組立工数が増加することもない。
Moreover, the partition wall 42 is integrally connected to the outer frame 40. That is, case 12a consists of a single member. Since the case 12a can be manufactured by extrusion molding or the like, the number of parts of the battery pack 10a is not increased, and the number of assembly steps is not increased.
加えて、この場合、単セル３０の各底面に設けられた正極端子及び負極端子が、ケース１２ａの押出方向と直交する方向となるように、第１バッテリコアパック１４及び第２バッテリコアパック１６がケース１２ａ内に収容されている。このため、発熱体である正極端子及び負極端子、熱伝導体であるバスバー３８が外枠４０又は隔壁４２に近接する。すなわち、電極端子とケース１２ａの内壁との距離が近くなる。このために伝熱距離が短くなるので、伝熱効率が向上する。
In addition, in this case, the first battery core pack 14 and the second battery core pack 16 are arranged so that the positive electrode terminal and the negative electrode terminal provided on each bottom surface of the single cell 30 are in a direction orthogonal to the pushing direction of the case 12a. Is accommodated in the case 12a. For this reason, the positive electrode terminal and the negative electrode terminal which are heating elements and the bus bar 38 which is a heat conductor are close to the outer frame 40 or the partition wall 42. That is, the distance between the electrode terminal and the inner wall of the case 12a is reduced. For this reason, since the heat transfer distance is shortened, the heat transfer efficiency is improved.
また、放熱シート５０が楔として機能するので、第１バッテリコアパック１４、第２バッテリコアパック１６が第１内室４４、第２内室４６から脱落することが困難となる。すなわち、第１バッテリコアパック１４、第２バッテリコアパック１６を、ケース１２ａ内の所望の位置に停止させることが容易となる。
Further, since the heat dissipation sheet 50 functions as a wedge, it is difficult for the first battery core pack 14 and the second battery core pack 16 to fall off from the first inner chamber 44 and the second inner chamber 46. That is, it becomes easy to stop the first battery core pack 14 and the second battery core pack 16 at desired positions in the case 12a.
さらに、外枠４０及び隔壁４２の少なくとも一方、好ましくは図４に示すように双方に、第１内室４４、第２内室４６と平行に延在する中空部６０を形成したケース１２ｂを採用してバッテリパック１０ｂを構成するとよい。なお、このような形状のケース１２ｂは、上記したケース１２ａと同様に、アルミニウム合金からなる素材に対して押出成形を行うことで作製することができる。
Further, a case 12b in which a hollow portion 60 extending in parallel with the first inner chamber 44 and the second inner chamber 46 is formed in at least one of the outer frame 40 and the partition wall 42, preferably both as shown in FIG. Thus, the battery pack 10b may be configured. Note that the case 12b having such a shape can be produced by performing extrusion molding on a material made of an aluminum alloy, similarly to the case 12a described above.
このケース１２ｂを用いたバッテリパック１０ｂにおいても、バッテリパック１０ａと同様に、第１バッテリコアパック１４、第２バッテリコアパック１６の熱が外枠４０に直接、又は隔壁４２を介して間接的に伝熱される。中空部６０は断熱作用を営むが、中空部６０によりケース１２ｂの全表面積が増大して大気に接触する面積が大きくなることから、ケース１２ｂと大気との熱伝達効率、すなわち、放熱効果が高くなる。また、隣り合う中空部６０、６０間の隔壁が外枠４０に一体的に連なっているため、ケース１２ｂの全体に対して伝熱されることから、第１バッテリコアパック１４及び第２バッテリコアパック１６の熱が矢印に従って速やかに放散される。すなわち、バッテリパック１０ａと同様の効果が得られる。
Also in the battery pack 10b using the case 12b, the heat of the first battery core pack 14 and the second battery core pack 16 is directly applied to the outer frame 40 or indirectly via the partition wall 42, similarly to the battery pack 10a. Heat is transferred. Although the hollow portion 60 performs a heat insulating action, the entire surface area of the case 12b is increased by the hollow portion 60 and the area in contact with the atmosphere is increased. Therefore, the heat transfer efficiency between the case 12b and the atmosphere, that is, the heat dissipation effect is high. Become. Further, since the partition wall between the adjacent hollow portions 60 and 60 is integrally connected to the outer frame 40, heat is transferred to the entire case 12b, so that the first battery core pack 14 and the second battery core pack Sixteen heats are quickly dissipated according to the arrows. That is, the same effect as the battery pack 10a can be obtained.
しかも、この場合、中空部６０がいわゆる肉抜きとなるので、この分、ケース１２ｂが軽量となる。すなわち、バッテリパック１０ｂの軽量化を図ることができるという利点もある。この場合、ユーザが、バッテリパック１０ｂを持ち上げたり、搬送したりすることが著しく容易となる。
In addition, in this case, since the hollow portion 60 is so-called meat removal, the case 12b is lightened accordingly. That is, there is an advantage that the battery pack 10b can be reduced in weight. In this case, it becomes extremely easy for the user to lift or carry the battery pack 10b.
本発明は、上記した実施の形態に特に限定されるものではなく、本発明の主旨を逸脱しない範囲で種々の変更が可能である。
The present invention is not particularly limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.
例えば、第１バッテリコアパック１４、第２バッテリコアパック１６の、バスバー３８が設けられていない側面と、第１内室４４、第２内室４６の内壁との間にも放熱シート５０を介挿するようにしてもよい。
For example, the heat dissipation sheet 50 is interposed between the side surfaces of the first battery core pack 14 and the second battery core pack 16 where the bus bar 38 is not provided and the inner walls of the first inner chamber 44 and the second inner chamber 46. You may make it insert.
１０ａ、１０ｂ…バッテリパック １２ａ、１２ｂ…ケース
１４、１６…バッテリコアパック ３０…単セル
３２、３６…セルホルダ ３４…収容孔
３８…バスバー ４０…外枠
４２…隔壁 ４４、４６…内室
５０…放熱シート ５２…ＢＭＵ
６０…中空部 10a, 10b ...battery pack 12a, 12b ... case 14, 16 ... battery core pack 30 ... single cell 32, 36 ... cell holder 34 ... receiving hole 38 ... bus bar 40 ... outer frame 42 ... partition wall 44, 46 ... inner chamber 50 ... heat dissipation Seat 52 ... BMU
60 ... hollow part
１４、１６…バッテリコアパック ３０…単セル
３２、３６…セルホルダ ３４…収容孔
３８…バスバー ４０…外枠
４２…隔壁 ４４、４６…内室
５０…放熱シート ５２…ＢＭＵ
６０…中空部 10a, 10b ...
60 ... hollow part
Claims (5)
- 複数個の単セルを有するバッテリコアパックと、複数個の前記バッテリコアパックを収容するケースとを備えるバッテリパックであって、
前記ケースは、外枠と、前記外枠に対して一体的に連なり、前記ケースの中空内部を複数個の内室に区画する隔壁とを有し、
前記隔壁により、前記内室が前記バッテリコアパックの個数と同数個で形成され、
個々の前記バッテリコアパックが、個々の前記内室に収容されていることを特徴とするバッテリパック。 A battery pack comprising a battery core pack having a plurality of single cells, and a case for housing the plurality of battery core packs,
The case includes an outer frame, and a partition wall that is integrally connected to the outer frame and partitions a hollow interior of the case into a plurality of inner chambers,
With the partition, the inner chamber is formed in the same number as the number of the battery core packs,
Each battery core pack is accommodated in each inner chamber. - 請求項１記載のバッテリパックにおいて、前記バッテリコアパックと、前記内室の内壁との間に放熱部材が介挿されていることを特徴とするバッテリパック。 2. The battery pack according to claim 1, wherein a heat dissipating member is interposed between the battery core pack and the inner wall of the inner chamber.
- 請求項１又は２記載のバッテリパックにおいて、前記外枠又は前記隔壁に、前記内室に対して平行に延在する中空部が形成されていることを特徴とするバッテリパック。 3. The battery pack according to claim 1, wherein a hollow portion extending in parallel with the inner chamber is formed in the outer frame or the partition wall.
- 請求項１～３のいずれか１項に記載のバッテリパックにおいて、前記ケースがアルミニウム又はアルミニウム合金の押出成形材からなることを特徴とするバッテリパック。 The battery pack according to any one of claims 1 to 3, wherein the case is made of an extruded material of aluminum or an aluminum alloy.
- 請求項４記載のバッテリパックにおいて、前記ケースの押出方向と、前記単セルの長手方向とが直交するように、前記バッテリコアパックが前記内室に収容されていることを特徴とするバッテリパック。 5. The battery pack according to claim 4, wherein the battery core pack is accommodated in the inner chamber so that an extruding direction of the case and a longitudinal direction of the single cell are orthogonal to each other.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-055947 | 2018-03-23 | ||
| JP2018055947A JP2019169337A (en) | 2018-03-23 | 2018-03-23 | Battery pack |
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| Publication Number | Publication Date |
|---|---|
| WO2019181630A1 true WO2019181630A1 (en) | 2019-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2019/009856 WO2019181630A1 (en) | 2018-03-23 | 2019-03-12 | Battery pack |
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| JP (1) | JP2019169337A (en) |
| WO (1) | WO2019181630A1 (en) |
Families Citing this family (3)
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|---|---|---|---|---|
| JP6790176B1 (en) * | 2019-06-04 | 2020-11-25 | 本田技研工業株式会社 | Battery pack |
| KR20210112639A (en) * | 2020-03-05 | 2021-09-15 | 주식회사 엘지에너지솔루션 | Battery pack with structure of improved convenience for carrying and assembling and improved safety |
| KR20240020076A (en) * | 2022-08-05 | 2024-02-14 | 주식회사 엘지에너지솔루션 | Battery pack |
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| JP2010140695A (en) * | 2008-12-10 | 2010-06-24 | Panasonic Corp | Battery module and aggregate battery module using the same |
| WO2016179557A1 (en) * | 2015-05-06 | 2016-11-10 | A123 Systems Llc | Battery crush protection system |
| JP2017504149A (en) * | 2014-11-10 | 2017-02-02 | エスゼット ディージェイアイ テクノロジー カンパニー リミテッドＳｚ Ｄｊｉ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ | Battery, thermal management device thereof, and UAV having this battery |
| JP2017041378A (en) * | 2015-08-20 | 2017-02-23 | 株式会社東芝 | Battery module |
| WO2017104942A1 (en) * | 2015-12-18 | 2017-06-22 | 주식회사 엘지화학 | Battery module, battery pack including such battery module, and vehicle including such battery pack |
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2018
- 2018-03-23 JP JP2018055947A patent/JP2019169337A/en active Pending
-
2019
- 2019-03-12 WO PCT/JP2019/009856 patent/WO2019181630A1/en active Application Filing
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| JP2010140695A (en) * | 2008-12-10 | 2010-06-24 | Panasonic Corp | Battery module and aggregate battery module using the same |
| JP2017504149A (en) * | 2014-11-10 | 2017-02-02 | エスゼット ディージェイアイ テクノロジー カンパニー リミテッドＳｚ Ｄｊｉ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ | Battery, thermal management device thereof, and UAV having this battery |
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| JP2019169337A (en) | 2019-10-03 |
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