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WO2019189354A1 - Battery pack - Google Patents

Battery pack Download PDF

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Publication number
WO2019189354A1
WO2019189354A1 PCT/JP2019/013173 JP2019013173W WO2019189354A1 WO 2019189354 A1 WO2019189354 A1 WO 2019189354A1 JP 2019013173 W JP2019013173 W JP 2019013173W WO 2019189354 A1 WO2019189354 A1 WO 2019189354A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
battery
cooling pipe
main circuit
refrigerant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2019/013173
Other languages
French (fr)
Japanese (ja)
Inventor
黒川　健也
阿部　達朗
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Toshiba Infrastructure Systems and Solutions Corp
Original Assignee
Toshiba Corp
Toshiba Infrastructure Systems and Solutions Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Toshiba Infrastructure Systems and Solutions Corp filed Critical Toshiba Corp
Priority to SG11202009562XA priority Critical patent/SG11202009562XA/en
Priority to CN201980022959.6A priority patent/CN111954953A/en
Publication of WO2019189354A1 publication Critical patent/WO2019189354A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • 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
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
    • 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
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • 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
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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
    • H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
    • 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

Definitions

  • the problem to be solved by the present invention is to provide an assembled battery that is easy to assemble and can be efficiently cooled.
  • the X direction is along the longitudinal direction of the assembled battery 1
  • the Y direction is along the short side of the assembled battery 1
  • the Z direction is along the height direction of the assembled battery 1.
  • the X direction, the Y direction, and the Z direction are orthogonal to each other.
  • FIG. 1 is a perspective view of an assembled battery 1 according to the embodiment. As shown in FIG. 1, the assembled battery 1 has a substantially rectangular parallelepiped shape formed of a thin metal plate.
  • the surface facing the surface having the positive electrode terminal 7a and the negative electrode terminal 7b of the battery cell 5 can be aligned on the bottom wall portion 12 side, and a plate 18 described later is attached facing the bottom wall portion 12. Thereby, it becomes possible to cool each battery cell 5 equally efficiently.
  • the first side wall 31 is provided with a main circuit terminal 14 for taking out a charging / discharging current of the battery cell 5.
  • a main circuit terminal 14 for taking out a charging / discharging current of the battery cell 5.
  • Two main circuit terminals 14 are formed, one being a positive electrode and the other being a negative electrode.
  • connection portions 40 and 41 have, for example, a female screw portion (not shown) inside, and are formed so as to be connectable to a bolt (not shown) having a male screw portion.
  • connection parts 40 and 41 may be comprised integrally with the battery pack 10 by insert formation etc., for example.
  • the first fixing member 60 has, for example, a first battery pack connection hole 60a through which a bolt passes in a portion facing the connection portion 40 formed on the first side wall 31 of the battery pack 10.
  • the first fixing member 60 can be fixed to the battery pack 10 by fastening the first battery pack connection hole 60a to the connection portion 40 through a bolt.
  • FIG. 11 is a perspective view of a state in which a plurality of plates 18 and a plurality of cooling pipes 70 are connected.
  • FIG. 12 shows the wiring of the main circuit line 80 and the communication line 90 when seven battery packs 10 are accommodated in the assembled battery 1.
  • the battery pack can be fixed to the plate and the frame via the first fixing member and the second fixing member, the assemblability is improved.
  • a cooling pipe that flows refrigerant, a cooling pipe inlet, a cooling pipe outlet, a refrigerant inlet, and a refrigerant outlet are provided in the lower part of the assembled battery in the height direction, and the main circuit line through which electricity flows, the main circuit terminal, and the total terminal are connected to the assembled battery. Therefore, it is possible to reduce the possibility of causing a short circuit due to contact with a water leak, a main circuit line, or the like as an example of the refrigerant.
  • FIG. 13 is a perspective view of a state in which a plurality of plates 19 and a plurality of cooling pipes 100 constituting the assembled battery according to this modification are connected.
  • the cooling pipe 70 is connected to the cooling pipe inlet 3 a and the cooling pipe outlet 3 b of the assembled battery 1, and is connected to the cooling passage 50 of each plate 19 from there.
  • the battery pack can be fixed to the plate and the frame via the first fixing member and the second fixing member, the assemblability is improved.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

Provided is a battery pack which has good ease of assembly and which can be efficiently cooled. The battery pack includes: multiple first housings having main circuit terminals; main circuit wires connecting the main circuit terminals to each other; multiple plates which face a prescribed surface of the first housings and which are provided cooling paths having a refrigerant inlet and a refrigerant outlet; cooling piping connecting the cooling paths with each other; and a second housing which holds the multiple first housings in the direction of depth perpendicular to the plate surface and which is provided with a common terminal, a cooling piping inlet, and a cooling piping outlet. The main circuit terminals, the main circuit wires, and the common terminal are disposed at the top in the height direction, and the refrigerant inlet, the refrigerant outlet, the cooling piping, the cooling piping inlet, and the cooling piping outlet are disposed at the bottom in the height direction of the second housing.

Description

組電池Assembled battery

　本発明の実施形態は、組電池に関する。 Embodiments of the present invention relate to an assembled battery.

　比較的大電流を必要とする場合、複数の電池パックを組み合わせた組電池を使用することがある。 When a relatively large current is required, an assembled battery in which a plurality of battery packs are combined may be used.

国際公開第２０１７／１５８７６３号International Publication No. 2017/158863

複数の電池パックを組み合わせる場合、その電池パックの組み立て性が問題となることや、電池パックを効率的に冷却する方法が問題となる。そこで、本発明が解決しようとする課題は、組立性がよく、効率的に冷却することが出来る組電池を提供することである。 When a plurality of battery packs are combined, the assembling property of the battery packs becomes a problem, and a method for efficiently cooling the battery packs becomes a problem. Therefore, the problem to be solved by the present invention is to provide an assembled battery that is easy to assemble and can be efficiently cooled.

上記の課題を解決するために、本実施形態の組電池は、略直方体形状であって、電池セルを収容し、前記電池セルの充放電電流を取り出すための主回路端子を有する複数の第一の筐体と、前記主回路端子同士を接続する主回路線と、前記第一の筐体の所定の面と対向し、冷媒入口と冷媒出口とを有する冷却通路が設けられた複数のプレートと、前記冷却通路同士を接続する冷却配管と、前記プレートの面と垂直な奥行き方向に複数の前記第一の筐体を収容し、前記電池セルの充放電電流を前記第二の筐体の外側に取り出すための総端子と、冷媒を前記第二の筐体の外側に取り出す冷却配管入口と冷却配管出口とを備えた前記第二の筐体と、を有し、前記主回路端子、前記主回路線、前記総端子を前記第二の筐体の高さ方向の上部に設け、前記冷媒入口、前記冷媒出口、前記冷却配管、前記冷却配管入口、前記冷却配管出口を前記第二の筐体の高さ方向の下部に設けている。 In order to solve the above-described problem, the assembled battery of the present embodiment has a substantially rectangular parallelepiped shape, and includes a plurality of first circuit terminals that house battery cells and have main circuit terminals for taking out charge / discharge currents of the battery cells A plurality of plates provided with a cooling passage having a refrigerant inlet and a refrigerant outlet opposed to a predetermined surface of the first casing, and a main circuit line connecting the main circuit terminals to each other; A cooling pipe connecting the cooling passages, and a plurality of the first casings in a depth direction perpendicular to the surface of the plate, and charging / discharging currents of the battery cells to the outside of the second casing And a second casing having a cooling pipe inlet and a cooling pipe outlet for taking out the refrigerant to the outside of the second casing, and the main circuit terminal, the main terminal A circuit line, and the total terminal is provided at an upper portion of the second casing in the height direction, Medium inlet, the refrigerant outlet, the cooling pipe, the cooling pipe inlet is provided with said cooling pipe outlet at the bottom in the height direction of the second housing.

図１は、実施形態に係る組電池の斜視図である。FIG. 1 is a perspective view of the assembled battery according to the embodiment. 図２は、実施形態に係る組電池のフレームの斜視図である。FIG. 2 is a perspective view of the frame of the assembled battery according to the embodiment. 図３は、実施形態に係る組電池の一部分解斜視図である。FIG. 3 is a partially exploded perspective view of the assembled battery according to the embodiment. 図４は、実施形態に係る電池パックと第一の固定部材と第二の固定部材とプレートの分解斜視図である。FIG. 4 is an exploded perspective view of the battery pack, the first fixing member, the second fixing member, and the plate according to the embodiment. 図５は、実施形態に係る電池セルの斜視図である。FIG. 5 is a perspective view of the battery cell according to the embodiment. 図６は、実施形態に係る電池パックと第一の固定部材と第二の固定部材とプレートの分解斜視図である。FIG. 6 is an exploded perspective view of the battery pack, the first fixing member, the second fixing member, and the plate according to the embodiment. 図７は、実施形態に係るプレートの斜視図である。FIG. 7 is a perspective view of a plate according to the embodiment. 図８は、実施形態に係るプレートの斜視図である。FIG. 8 is a perspective view of a plate according to the embodiment. 図９は、実施形態に係る冷却通路の断面図である。FIG. 9 is a cross-sectional view of the cooling passage according to the embodiment. 図１０は、実施形態に係る溝の断面図である。FIG. 10 is a cross-sectional view of the groove according to the embodiment. 図１１は、実施形態に係るプレートと冷却配管の斜視図である。FIG. 11 is a perspective view of the plate and the cooling pipe according to the embodiment. 図１２は、実施形態に係る主回路線と通信線の斜視図である。FIG. 12 is a perspective view of a main circuit line and a communication line according to the embodiment. 図１３は、変形例に係る主回路線と通信線の斜視図である。FIG. 13 is a perspective view of main circuit lines and communication lines according to a modification.

実施形態Embodiment

　以下、実施形態の組電池を、図面を参照して説明する。なお、以下の各図では便宜上、方向が規定されている。Ｘ方向は、組電池１の長手方向に沿い、Ｙ方向は組電池１の短手方向に沿い、Ｚ方向は組電池１の高さ方向に沿っている。Ｘ方向、Ｙ方向、およびＺ方向は、互いに直交している。 Hereinafter, the assembled battery of the embodiment will be described with reference to the drawings. In the following drawings, directions are defined for convenience. The X direction is along the longitudinal direction of the assembled battery 1, the Y direction is along the short side of the assembled battery 1, and the Z direction is along the height direction of the assembled battery 1. The X direction, the Y direction, and the Z direction are orthogonal to each other.

　図１は、実施形態に係る組電池１の斜視図である。図１に示す通り、組電池１は金属薄板により形成された略直方体形状を有する。 FIG. 1 is a perspective view of an assembled battery 1 according to the embodiment. As shown in FIG. 1, the assembled battery 1 has a substantially rectangular parallelepiped shape formed of a thin metal plate.

組電池１はＺ軸方向上側の面である上面１ａとその上面に対向する下面１ｂと、上面１ａと下面１ｂに挟まれた側面のうち、Ｙ軸方向に垂直で互いに対向する側面１ｃと側面１ｄと、Ｘ軸方向に垂直で互いに対向する側面１ｅと側面１ｆと、に囲まれて略直方体形状を形成している。 The assembled battery 1 includes an upper surface 1a that is an upper surface in the Z-axis direction, a lower surface 1b that faces the upper surface, and a side surface 1c and a side surface that are perpendicular to the Y-axis direction and that face each other between the upper surface 1a and the lower surface 1b. A substantially rectangular parallelepiped shape is formed by being surrounded by 1d and side surfaces 1e and 1f that are perpendicular to the X-axis direction and face each other.

　側面１ｅのうちＺ軸方向（高さ方向）の上部に、後に説明する複数の電池パック１０の充放電電流を取り出すための総端子２ａ及び２ｂを備えている。また、同じく側面１ｅのＺ軸方向（高さ方向）の下部には後に説明するプレート(図示せず)に形成された冷却通路（図示せず）を流れる冷媒を、組電池１の外側に取り出すための冷却配管入口３ａと冷却配管出口３ｂを有する。 The total terminals 2a and 2b for taking out the charging / discharging current of the several battery pack 10 demonstrated later are provided in the Z-axis direction (height direction) upper part among the side surfaces 1e. Similarly, a refrigerant flowing in a cooling passage (not shown) formed in a plate (not shown), which will be described later, is taken out to the outside of the assembled battery 1 at the lower part of the side surface 1e in the Z-axis direction (height direction). A cooling pipe inlet 3a and a cooling pipe outlet 3b.

図２は組電池１を構成するフレーム２０の斜視図である。図２では図１で示した組電池１のうち、上面１ａ、下面１ｂ、側面１ｃ、側面１ｄ、側面１ｅ、側面１ｆを形成している金属薄板や、組電池１の内部に収容されたものを図示していない。 FIG. 2 is a perspective view of the frame 20 constituting the assembled battery 1. In FIG. 2, among the assembled battery 1 shown in FIG. 1, a thin metal plate forming the upper surface 1a, the lower surface 1b, the side surface 1c, the side surface 1d, the side surface 1e, and the side surface 1f, or the one contained in the assembled battery 1 Is not shown.

図２に示した通り、組電池１はフレーム２０を骨格として形成されており、このフレーム２０に対して、上面１ａ、下面１ｂ、側面１ｃ、側面１ｄ、側面１ｅ、側面１ｆを形成する金属薄板を固定している。この金属薄板は、フレーム２０に対して溶接により固定されるか、図１に示すように、鋲４にて留められている。さらに、フレーム２０と金属薄板との境界部は、樹脂材にてシーリングされて隙間が生じないようになっていることが好ましい。組電池１は、フレーム２０と、金属薄板により形成される上面１ａ、下面１ｂ、側面１ｃ、１ｄ、１ｅ、１ｆと、によって構成される第二の筐体を備える。 As shown in FIG. 2, the assembled battery 1 is formed with a frame 20 as a skeleton, and a thin metal plate that forms an upper surface 1 a, a lower surface 1 b, a side surface 1 c, a side surface 1 d, a side surface 1 e, and a side surface 1 f with respect to the frame 20. Is fixed. This thin metal plate is fixed to the frame 20 by welding, or is fastened by a flange 4 as shown in FIG. Furthermore, the boundary between the frame 20 and the metal thin plate is preferably sealed with a resin material so that no gap is generated. The assembled battery 1 includes a second casing that includes a frame 20 and an upper surface 1a, a lower surface 1b, and side surfaces 1c, 1d, 1e, and 1f formed of a thin metal plate.

このように金属薄板をフレーム２０に固定することで、組電池１の外部から内部に侵入する水分量を極力少なくすることが出来る。 By fixing the metal thin plate to the frame 20 in this way, the amount of moisture that enters the inside of the assembled battery 1 from the outside can be reduced as much as possible.

次に、組電池１の内部に収容する電池パック１０などについて図３などを用いて説明する。図３は、組電池１のうち、フレーム２０と、組電池１に収容する電池パック１０と第一の固定部材６０と第二の固定部材６１とプレート１８と冷却通路５０を図示したものである。図３に示すように、複数の電池パック１０が第一の固定部材６０、第二の固定部材６１、プレート１８と共に組電池１に収容されている。 Next, the battery pack 10 accommodated in the assembled battery 1 will be described with reference to FIG. FIG. 3 illustrates the frame 20, the battery pack 10 accommodated in the assembled battery 1, the first fixing member 60, the second fixing member 61, the plate 18, and the cooling passage 50 in the assembled battery 1. . As shown in FIG. 3, the plurality of battery packs 10 are accommodated in the assembled battery 1 together with the first fixing member 60, the second fixing member 61, and the plate 18.

電池パック１０は、矩形の底壁部１２とその底壁部１２に対向する上部１３とその上部１３と底壁部１２をつなぐ４つの側壁を有する第一の筐体を備える。この４つの側壁のうちＺ軸に垂直で、Ｚ軸方向上側に形成されたものを第一の側壁３１、それに対向してＺ軸方向下側に形成されたものを第二の側壁３２とする。この電池パック１０は、例えば、その上部１３側と底壁部１２側の上下方向に複数の区画に分かれ、後に説明する電池セル５がその正極端子７ａ及び負極端子７ｂを有する面を電池パック１０の上部１３側に、正極端子７ａ及び負極端子７ｂを有する面と対向する面を電池パック１０の底壁部１２側になるように、収容されている。また、各区画においては、幅方向に複数の電池セルが収容されている。例えば、上下方向に３段の区画があり、各区画の幅方向に８個の電池セルが収容されていれば、合計２４個の電池セルが、正極端子７ａ及び負極端子７ｂを有する面が一方向に揃うように、収容されている。言い換えれば、正極端子７ａ及び負極端子７ｂを有する面と対向する面が一方向に揃うように、収容されている。これにより、電池セル５の正極端子７ａ及び負極端子７ｂを有する面と対向する面を底壁部１２側に揃えることができ、この底壁部１２に対向して、後に説明するプレート１８を取り付けることで、各電池セル５を均等に効率良く冷却することが可能となる。 The battery pack 10 includes a first housing having a rectangular bottom wall portion 12, an upper portion 13 facing the bottom wall portion 12, and four side walls connecting the upper portion 13 and the bottom wall portion 12. Of these four side walls, the first side wall 31 is formed on the upper side in the Z-axis direction and is perpendicular to the Z-axis, and the second side wall 32 is formed on the lower side in the Z-axis direction so as to be opposed thereto. . The battery pack 10 is divided into, for example, a plurality of sections in the vertical direction on the top 13 side and the bottom wall 12 side, and a battery cell 5 to be described later has a surface on which the positive electrode terminal 7a and the negative electrode terminal 7b are provided. Of the battery pack 10 so that the surface facing the surface having the positive electrode terminal 7a and the negative electrode terminal 7b is on the bottom wall portion 12 side of the battery pack 10. In each section, a plurality of battery cells are accommodated in the width direction. For example, if there are three sections in the vertical direction and eight battery cells are accommodated in the width direction of each section, a total of 24 battery cells have one surface having the positive electrode terminal 7a and the negative electrode terminal 7b. It is housed so that it is aligned in the direction. In other words, it is accommodated so that the surface facing the surface having the positive electrode terminal 7a and the negative electrode terminal 7b is aligned in one direction. Thereby, the surface facing the surface having the positive electrode terminal 7a and the negative electrode terminal 7b of the battery cell 5 can be aligned on the bottom wall portion 12 side, and a plate 18 described later is attached facing the bottom wall portion 12. Thereby, it becomes possible to cool each battery cell 5 equally efficiently.

第一の側壁３１には、例えば４つの接続部４０が形成されており、第一の固定部材６０は接続部４０を介して第一の側壁３１に接続されている。また、第二の側壁３２には、例えば４つの接続部４１が形成されており、第二の固定部材６１は、接続部４１を介して第二の側壁３２に接続されている。 For example, four connection portions 40 are formed on the first side wall 31, and the first fixing member 60 is connected to the first side wall 31 via the connection portion 40. Further, for example, four connection portions 41 are formed on the second side wall 32, and the second fixing member 61 is connected to the second side wall 32 via the connection portion 41.

さらに、第一の側壁３１には、電池セル５の充放電電流を取り出すための主回路端子１４を備えている。主回路端子１４は２つ形成され、一方は正極であり、他方は負極となる。 Further, the first side wall 31 is provided with a main circuit terminal 14 for taking out a charging / discharging current of the battery cell 5. Two main circuit terminals 14 are formed, one being a positive electrode and the other being a negative electrode.

また、同じく第一の側壁３１には、他の電池パック１０と通信を行う通信線９０に接続するための通信端子１５を備えている。本実施形態では２本の通信線９０と接続するために、通信端子１５を二つ備えている。 Similarly, the first side wall 31 is provided with a communication terminal 15 for connection to a communication line 90 that communicates with another battery pack 10. In the present embodiment, two communication terminals 15 are provided to connect to the two communication lines 90.

組電池１に収容する電池パック１０、第一の固定部材６０、第二の固定部材６１、プレート１８については図４を用いて詳しく説明する。図４に示す通り、電池パック１０はその底壁部１２をプレート１８に対向するように取り付けられ、電池パック１０とプレート１８は第一の固定部材６０及び第二の固定部材６１により接続されている。 The battery pack 10, the first fixing member 60, the second fixing member 61, and the plate 18 housed in the assembled battery 1 will be described in detail with reference to FIG. As shown in FIG. 4, the battery pack 10 is attached with its bottom wall 12 facing the plate 18, and the battery pack 10 and the plate 18 are connected by a first fixing member 60 and a second fixing member 61. Yes.

電池パック１０は、図５に示すような電池セル５を収容している。図５に示されるように、電池セル５は、一方向に薄い偏平の直方体状に構成されている。電池セル５は、筐体６と、正極端子７ａと、負極端子７ｂとを有している。筐体６内には、不図示の電極体および電解液が収容されている。電極体は、一例として、発電要素である正極シートおよび負極シートがセパレータを介してスパイラル状に巻かれて形成されうる。また、電極体は、一例として、正極シートおよび負極シートがセパレータを介して積層されて形成されうる。電極体の正極シートおよび負極シートに、正極端子７ａおよび負極端子７ｂがそれぞれ接続されている。 The battery pack 10 accommodates battery cells 5 as shown in FIG. As FIG. 5 shows, the battery cell 5 is comprised by the flat rectangular parallelepiped shape thin in one direction. The battery cell 5 has a housing 6, a positive terminal 7a, and a negative terminal 7b. In the housing 6, an electrode body (not shown) and an electrolytic solution are accommodated. As an example, the electrode body can be formed by winding a positive electrode sheet and a negative electrode sheet, which are power generation elements, spirally through a separator. In addition, as an example, the electrode body can be formed by laminating a positive electrode sheet and a negative electrode sheet via a separator. A positive electrode terminal 7a and a negative electrode terminal 7b are connected to the positive electrode sheet and the negative electrode sheet of the electrode body, respectively.

筐体６は、金属材料（例えば、アルミニウムや、アルミニウム合金、ステンレス等）や合成樹脂材料で構成されている。筐体６は、収容体６ａと蓋体６ｂとが組み合わせられて構成されている。収容体６ａは、上部が開放された略直方体の箱型に形成されており、この収容体６ａに電極体および電解液が収容されている。蓋体６ｂは、収容体６ａの開放された上部を塞いでいる。筐体６は、容器とも称されうる。 The housing 6 is made of a metal material (for example, aluminum, aluminum alloy, stainless steel, etc.) or a synthetic resin material. The housing 6 is configured by combining a container 6a and a lid 6b. The container 6a is formed in a substantially rectangular parallelepiped box shape with an open top, and an electrode body and an electrolytic solution are housed in the container 6a. The lid 6b closes the opened upper part of the container 6a. The housing 6 can also be referred to as a container.

接続部４０，４１は、内部に例えば雌ネジ部（図示しない）を有し、雄ネジ部を有するボルト（図示しない）と接続可能に形成されている。また、接続部４０，４１は、例えば、インサート形成などによって、電池パック１０と一体に構成されていてもよい。 The connection portions 40 and 41 have, for example, a female screw portion (not shown) inside, and are formed so as to be connectable to a bolt (not shown) having a male screw portion. Moreover, the connection parts 40 and 41 may be comprised integrally with the battery pack 10 by insert formation etc., for example.

第一の固定部材６０は、電池パック１０の第一の側壁３１に形成されている接続部４０に対向する部分に、例えばボルトが貫通する第一の電池パック接続孔６０ａを有している。この第一の電池パック接続孔６０ａにボルトを通して接続部４０に締結することで、第一の固定部材６０を電池パック１０に固定できる。 The first fixing member 60 has, for example, a first battery pack connection hole 60a through which a bolt passes in a portion facing the connection portion 40 formed on the first side wall 31 of the battery pack 10. The first fixing member 60 can be fixed to the battery pack 10 by fastening the first battery pack connection hole 60a to the connection portion 40 through a bolt.

第二の固定部材６１も第一の固定部材６０と同様に、第二の側壁３２に形成されている接続部４１に対向する部分に、例えばボルトが貫通する第二の電池パック接続孔６１ａを有している。この第二の電池パック接続孔６１ａにボルトを通して接続部４１に締結することで、第二の固定部材６１を組電池１に固定できる。 Similarly to the first fixing member 60, the second fixing member 61 has a second battery pack connection hole 61 a through which, for example, a bolt penetrates a portion facing the connection portion 41 formed on the second side wall 32. Have. The second fixing member 61 can be fixed to the assembled battery 1 by fastening the second battery pack connection hole 61a to the connection portion 41 through a bolt.

第一の固定部材６０は、電池パック１０に対向する面（ＸＹ平面）に垂直に立設している面であるＸＺ平面及びＹＺ平面を有し、ＸＺ平面においては後に詳しく説明するプレート１８に接続するためのプレート接続孔６０ｂが形成され、ＹＺ平面においては、組電池１のフレーム２０に接続するためのフレーム接続孔６０ｃが形成されている。言い換えると、第一の固定部材６０は、ＸＺ平面に沿って立設するとともにプレート接続孔６０ｂが形成された第１の固定片と、ＹＺ平面に沿って立設するとともにプレート接続孔６０ｃが形成された第２の固定片と、を備える。 The first fixing member 60 has an XZ plane and a YZ plane that are perpendicular to a surface (XY plane) facing the battery pack 10, and the XZ plane has a plate 18 described in detail later. A plate connection hole 60b for connection is formed, and a frame connection hole 60c for connection to the frame 20 of the assembled battery 1 is formed in the YZ plane. In other words, the first fixing member 60 is erected along the XZ plane and the first fixing piece in which the plate connection hole 60b is formed, and is erected along the YZ plane and the plate connection hole 60c is formed. A second fixed piece.

また、プレート１８の第一の固定部材６０と接続する部分には、雌ネジ部１８ｃを有し、ボルトと接続可能に形成されている。これにより、第一の固定部材６０に形成されたプレート接続孔６０ｂにボルトを通してプレート１８に形成された雌ネジ部に締結することで、第一の固定部材をプレート１８に固定できる。雌ネジ部１８ｃは貫通していてもよいし、貫通していなくてもよい。なお、後に説明するように、プレート１８の両面に電池パック１０を固定する場合には、雌ネジ部１８ｃは貫通していることが好ましい。 Moreover, the part connected to the 1st fixing member 60 of the plate 18 has the internal thread part 18c, and is formed so that a connection with a volt | bolt is possible. Accordingly, the first fixing member can be fixed to the plate 18 by fastening the bolt through the plate connection hole 60 b formed in the first fixing member 60 and the female screw portion formed in the plate 18. The female screw portion 18c may penetrate or may not penetrate. As will be described later, when the battery pack 10 is fixed to both surfaces of the plate 18, it is preferable that the female screw portion 18c penetrates.

同様にして、フレーム２０の第一の固定部材６０と接続する部分には、例えば雌ネジ部を有し、ボルトと接続可能に形成されている。これにより、第一の固定部材６０に形成されたフレーム接続孔６０ｃにボルトを通してフレーム２０に形成された雌ネジ部（図示しない）に締結することで、第一の固定部材６０をフレーム２０に固定できる。 Similarly, the portion connected to the first fixing member 60 of the frame 20 has, for example, a female screw portion and is formed so as to be connectable to a bolt. As a result, the first fixing member 60 is fixed to the frame 20 by fastening it to the female screw portion (not shown) formed in the frame 20 through the bolt in the frame connection hole 60c formed in the first fixing member 60. it can.

図６に示されるように、第二の固定部材６１は、電池パック１０に対向する面（ＸＹ平面）に垂直に立設している面であるＸＺ平面及びＹＺ平面を有し、ＸＺ平面においては後に詳しく説明するプレート１８に接続するためのプレート接続孔６１ｂが形成され、ＹＺ平面においては、組電池１のフレーム２０に接続するためのフレーム接続孔６１ｃが形成されている。言い換えると、第二の固定部材６１は、ＸＺ平面に沿って立設するとともにプレート接続孔６０ｂが形成された第１の固定片と、ＹＺ平面に沿って立設するとともにプレート接続孔６０ｃが形成された第２の固定片と、を備える。 As shown in FIG. 6, the second fixing member 61 has an XZ plane and a YZ plane, which are surfaces standing upright to a surface (XY plane) facing the battery pack 10, and in the XZ plane A plate connection hole 61b for connecting to the plate 18 described in detail later is formed, and a frame connection hole 61c for connecting to the frame 20 of the assembled battery 1 is formed in the YZ plane. In other words, the second fixing member 61 is erected along the XZ plane and the first fixing piece in which the plate connection hole 60b is formed, and is erected along the YZ plane and the plate connection hole 60c is formed. A second fixed piece.

また、プレート１８の第二の固定部材６１と接続する部分には、雌ネジ部１８ｃを有し、ボルトと接続可能に形成されている。これにより、第二の固定部材６１に形成されたプレート接続孔６０ｂにボルトを通してプレート１８に形成された雌ネジ部１８ｃに締結することで、第二の固定部材６１をプレート１８に固定できる。 Moreover, the part connected to the 2nd fixing member 61 of the plate 18 has the internal thread part 18c, and is formed so that a connection with a volt | bolt is possible. Accordingly, the second fixing member 61 can be fixed to the plate 18 by fastening the female screw portion 18c formed in the plate 18 through the bolt through the plate connection hole 60b formed in the second fixing member 61.

同様にして、フレーム２０の第二の固定部材６１と接続する部分には、例えば雌ネジ部を有し、ボルトと接続可能に形成されている。これにより、第二の固定部材６１に形成されたフレーム接続孔６０ｃにボルトを通してフレーム２０に形成された雌ネジ部（図示しない）に締結することで、第二の固定部材６１をフレーム２０に固定できる。 Similarly, the portion connected to the second fixing member 61 of the frame 20 has, for example, a female screw portion and is formed so as to be connectable to a bolt. As a result, the second fixing member 61 is fixed to the frame 20 by fastening it to a female screw portion (not shown) formed in the frame 20 through a bolt through the frame connection hole 60 c formed in the second fixing member 61. it can.

このようにして、第一の固定部材６０及び第二の固定部材６１はプレート１８やフレーム２０に対して、それぞれボルトなどを介して接続、固定されている。 In this way, the first fixing member 60 and the second fixing member 61 are connected and fixed to the plate 18 and the frame 20 via bolts or the like, respectively.

なお、図４においては一つのプレート１８に対して一つの電池パック１０を固定するように示したが、これに限られることはなく、図６に示すように一つのプレート１８に対して二つの電池パック１０を固定することも可能である。 In FIG. 4, one battery pack 10 is fixed to one plate 18. However, the present invention is not limited to this. As shown in FIG. It is also possible to fix the battery pack 10.

続いてプレート１８について、図７及び図８を用いて説明する。図７はプレート１８の斜視図であり、図８は図７の裏側から見たプレート１８の斜視図である。 Next, the plate 18 will be described with reference to FIGS. 7 is a perspective view of the plate 18, and FIG. 8 is a perspective view of the plate 18 as seen from the back side of FIG.

プレート１８は電池パック１０を固定でき、かつ、電池パック１０を冷却することのできる機能を有する。電池パック１０は電池パック１０の底壁部１２をプレート１８に対向するように固定される。本実施形態では、第一の固定部材６０及び第二の固定部材６１の構造上、底壁部１２がプレート１８に固定されている。電池パック１０がプレート１８に固定される手段としては、先に説明した第一の固定部材６０及び第二の固定部材６１を用いており、プレート１８には、第一の固定部材６０と第二の固定部材６１を固定するための雌ネジ部１８ｃを複数有する。 The plate 18 has a function of fixing the battery pack 10 and cooling the battery pack 10. The battery pack 10 is fixed so that the bottom wall portion 12 of the battery pack 10 faces the plate 18. In the present embodiment, the bottom wall portion 12 is fixed to the plate 18 due to the structure of the first fixing member 60 and the second fixing member 61. As the means for fixing the battery pack 10 to the plate 18, the first fixing member 60 and the second fixing member 61 described above are used. The plate 18 includes the first fixing member 60 and the second fixing member 61. A plurality of female screw portions 18c for fixing the fixing member 61 is provided.

プレート１８のうち、電池パック１０と対向する面である第一の面１８ａ若しくは第一の面１８ａと反対側の面である第二の面１８ｂには、溝５０ａが形成され、この溝５０ａには管状の冷却通路５０が埋め込まれている。溝５０ａ及び冷却通路５０はプレート１８の一端からプレート１８を広くカバーするように直線部と曲線部を組み合わせて形成され、プレート１８の一端部に戻るように形成されている。すなわち、溝５０aと冷却通路５０の始端である冷媒入口５０－１と終端である冷媒出口５０－２はプレート１８の一端に２か所形成されていることになる。本実施形態では、冷媒入口５０－１及び冷媒出口５０－２はプレートの高さ方向（Ｚ軸方向）の下部に有する。 Of the plate 18, a groove 50a is formed in the first surface 18a that is the surface facing the battery pack 10 or the second surface 18b that is the surface opposite to the first surface 18a. Is embedded with a tubular cooling passage 50. The groove 50 a and the cooling passage 50 are formed by combining a straight portion and a curved portion so as to cover the plate 18 widely from one end of the plate 18, and are formed so as to return to one end of the plate 18. That is, the groove 50 a, the refrigerant inlet 50-1 that is the starting end of the cooling passage 50, and the refrigerant outlet 50-2 that is the terminal end are formed at one end of the plate 18. In the present embodiment, the refrigerant inlet 50-1 and the refrigerant outlet 50-2 are provided at the lower part in the plate height direction (Z-axis direction).

冷却通路５０は中空円形の管５０ｂを溝５０ａに圧入して形成されている。管５０ｂは金属製であることが好ましく、例えば銅製である。この中空円形の管５０ｂに冷媒を流すことにより、プレート１８を冷却することができる。 The cooling passage 50 is formed by press-fitting a hollow circular tube 50b into the groove 50a. The tube 50b is preferably made of metal, for example, copper. The plate 18 can be cooled by flowing a coolant through the hollow circular tube 50b.

図９は、本実施形態に係る冷却通路５０及び溝５０aの一部断面図である。冷却通路５０は中空円形の管５０ｂを溝５０aに圧入して形成されている。管５０ｂは金属製であることが好ましく、例えば銅製である。図９の管５０ｂは溝５０aに圧入して変形した状態を示したものであり、変形前の管５０ｂは円形の断面を有するものである。 FIG. 9 is a partial cross-sectional view of the cooling passage 50 and the groove 50a according to the present embodiment. The cooling passage 50 is formed by press-fitting a hollow circular tube 50b into the groove 50a. The tube 50b is preferably made of metal, for example, copper. The pipe 50b in FIG. 9 shows a state in which it is pressed into the groove 50a and deformed, and the pipe 50b before deformation has a circular cross section.

図１０は本実施形態に係る溝５０aのみを示した断面図である。図１０に示すように、本実施形態に係る溝５０aは溝５０aの開口部の幅をＡとすると、溝５０aの開口部から溝５０aの底付近にＡよりも大きな幅Ｂが形成されている。言い換えると、溝５０aの開口部から溝５０aの底までの距離をＣとした場合に、開口部から１／２Ｃ～Ｃにおいて、幅Ａよりも大きな幅Ｂが形成されている。 FIG. 10 is a sectional view showing only the groove 50a according to the present embodiment. As shown in FIG. 10, the groove 50a according to this embodiment has a width B larger than A in the vicinity of the bottom of the groove 50a from the opening of the groove 50a, where A is the width of the opening of the groove 50a. . In other words, when the distance from the opening of the groove 50a to the bottom of the groove 50a is C, a width B larger than the width A is formed at 1 / 2C to C from the opening.

また溝５０aは底部曲線を有し、溝５０ａの底部曲線は、冷却通路を構成する中空円形の管５０ｂを溝５０aに圧入する前の管５０ｂにおける最外部の曲率半径よりも大きな曲率半径を有している。また、溝５０aの底部曲線は、溝５０aの開口部の幅の半分よりも大きな曲率半径を有している。 The groove 50a has a bottom curve, and the bottom curve of the groove 50a has a radius of curvature larger than the outermost radius of curvature of the tube 50b before the hollow circular tube 50b constituting the cooling passage is press-fitted into the groove 50a. is doing. The bottom curve of the groove 50a has a radius of curvature that is greater than half the width of the opening of the groove 50a.

このような溝５０aに対して管５０ｂを圧入すると、円形の管５０ｂは溝５０aの底部に接触し、さらに押し込まれることで、図９に示すように、管５０ｂのうち溝５０aと接触した部分は溝５０aの形に沿って変形する。 When the tube 50b is press-fitted into such a groove 50a, the circular tube 50b comes into contact with the bottom of the groove 50a and is further pushed in, so that the portion of the tube 50b in contact with the groove 50a as shown in FIG. Deforms along the shape of the groove 50a.

　組電池１に備わる複数のプレート１８は、そのプレート１８に設けられた冷却通路５０同士が、後に説明する冷却配管７０によって接続されている。そのため、プレート１８の冷媒入口５０－１及び冷媒出口５０－２には、冷却配管７０と接続するための冷却配管接続部５１が形成されている。この冷却配管接続部５１は、図４に示すようにプレート１８から、Ｘ軸方向に沿って両方向に延出するように形成されていたり、図７及び図８に示すプレート１８のように、Ｘ軸方向に沿って片側に延出するように形成されている場合がある。 The plurality of plates 18 provided in the assembled battery 1 have cooling passages 50 provided in the plates 18 connected to each other by a cooling pipe 70 described later. Therefore, a cooling pipe connecting portion 51 for connecting to the cooling pipe 70 is formed at the refrigerant inlet 50-1 and the refrigerant outlet 50-2 of the plate 18. The cooling pipe connecting portion 51 is formed so as to extend from the plate 18 in both directions along the X-axis direction as shown in FIG. 4, or like the plate 18 shown in FIGS. It may be formed to extend to one side along the axial direction.

続いて図１１を用い、組電池１を構成するプレート１８と冷却配管７０の位置関係などについて説明する。図１１は、複数のプレート１８と複数の冷却配管７０が接続された状態の斜視図である。 Next, the positional relationship between the plate 18 and the cooling pipe 70 constituting the assembled battery 1 will be described with reference to FIG. FIG. 11 is a perspective view of a state in which a plurality of plates 18 and a plurality of cooling pipes 70 are connected.

図１１において、紙面上最も左に位置するプレート１８から、第一のプレート１８－１、第二のプレート１８－２、第三のプレート１８－３、第四のプレート１８－４とする。 In FIG. 11, the first plate 18-1, the second plate 18-2, the third plate 18-3, and the fourth plate 18-4 are designated from the leftmost plate 18 in the drawing.

第一のプレート１８－１の両面には、図示していないが２つの電池パック１０が固定される。また、第二のプレート１８－２の紙面上左側の面には、図示していないが１つの電池パック１０が固定されている。第三のプレート１８－３の両面には、図示していないが２つの電池パック１０が固定されている。第四のプレート１８－４の両面には、図示していないが２つの電池パック１０が固定され、第一のプレート１８－１から第四のプレート１８－４の合計７個の電池パックが固定されている。 Although not shown, two battery packs 10 are fixed to both surfaces of the first plate 18-1. Further, one battery pack 10 is fixed to the left surface of the second plate 18-2 on the paper, although not shown. Although not shown, two battery packs 10 are fixed to both surfaces of the third plate 18-3. Although not shown, two battery packs 10 are fixed to both surfaces of the fourth plate 18-4, and a total of seven battery packs from the first plate 18-1 to the fourth plate 18-4 are fixed. Has been.

冷却配管７０は組電池１の冷却配管入口３ａ及び冷却配管出口３ｂに接続され、そこから各プレート１８の冷却通路５０に接続されている。 The cooling pipe 70 is connected to the cooling pipe inlet 3 a and the cooling pipe outlet 3 b of the assembled battery 1, and is connected to the cooling passage 50 of each plate 18 from there.

本実施形態において、まず組電池１のフレーム２０に備わる冷却配管入口３ａは冷却配管７０を介して、第三のプレート１８－３の冷媒入口５０－１に接続されている。また、第三のプレートの冷媒出口５０－２は、冷却配管７０を介して、第四のプレート１８－４の冷媒入口５０－１に接続されている。続いて、第四のプレート１８－４の冷媒出口５０－２は、冷却配管７０を介して、第一のプレート１８－１の冷媒入口５０－１に接続されている。さらに、第一のプレート１８－１の冷媒出口５０－２は冷却配管７０を介して、第二のプレート１８－２の冷媒入口５０－１に接続されている。そして、第二のプレート１８－２の冷媒出口５０－２は冷却配管７０を介して、フレーム２０に備わる冷却配管出口３ｂに接続されている。 In the present embodiment, first, the cooling pipe inlet 3a provided in the frame 20 of the assembled battery 1 is connected to the refrigerant inlet 50-1 of the third plate 18-3 via the cooling pipe 70. The refrigerant outlet 50-2 of the third plate is connected to the refrigerant inlet 50-1 of the fourth plate 18-4 via the cooling pipe 70. Subsequently, the refrigerant outlet 50-2 of the fourth plate 18-4 is connected to the refrigerant inlet 50-1 of the first plate 18-1 via the cooling pipe 70. Further, the refrigerant outlet 50-2 of the first plate 18-1 is connected to the refrigerant inlet 50-1 of the second plate 18-2 via the cooling pipe 70. The refrigerant outlet 50-2 of the second plate 18-2 is connected to the cooling pipe outlet 3b of the frame 20 via the cooling pipe 70.

　このように配管をすることで、組電池１の外部から冷却配管入口３ａに冷媒を流入し、その冷媒は冷却配管７０や各プレート１８に備わる冷却通路５０を介して、最終的にその冷媒を冷却配管出口３ｂから組電池１の外部に取り出すことが出来る。これにより、各プレート１８が冷媒により冷却され、各プレート１８に固定された電池パック１０やその内部に収容された電池セル５を冷却することができ、発熱による電池の性能劣化を抑制することが出来る。 By piping in this way, the refrigerant flows into the cooling pipe inlet 3 a from the outside of the assembled battery 1, and the refrigerant finally passes through the cooling pipe 50 and the cooling passage 50 provided in each plate 18. It can be taken out of the assembled battery 1 from the cooling pipe outlet 3b. Thereby, each plate 18 is cooled by the refrigerant, the battery pack 10 fixed to each plate 18 and the battery cell 5 accommodated therein can be cooled, and deterioration of battery performance due to heat generation can be suppressed. I can do it.

　また、本実施形態では、組電池１のＸ軸方向における中央部に最も近いプレートである第三のプレート１８－３に対して、冷却配管入口３ａから直接に接続されている。よって、最も冷えた冷媒が第三のプレート１８－３の冷却通路５０に流れることになる。第三のプレート１８－３は、組電池１のＸ軸方向における中央部に最も近いプレートであるため、最も放熱しづらい位置にある。そのプレートに対して最も冷えた冷媒を流すことで、効率的に電池パック１０を冷却することが出来る。 In the present embodiment, the battery pack 1 is directly connected to the third plate 18-3, which is the plate closest to the center in the X-axis direction, from the cooling pipe inlet 3a. Therefore, the coldest refrigerant flows into the cooling passage 50 of the third plate 18-3. Since the third plate 18-3 is the plate closest to the central portion in the X-axis direction of the assembled battery 1, it is at a position where heat radiation is most difficult. The battery pack 10 can be efficiently cooled by supplying the coldest coolant to the plate.

　続いて、組電池１のＺ軸方向上側に設けられる、主回路線８０及び通信線９０の位置関係などについて、図１２を用いて説明する。図１２は、７個の電池パック１０を組電池１に収容した場合の主回路線８０及び通信線９０の配線である。 Subsequently, the positional relationship between the main circuit line 80 and the communication line 90 provided on the upper side of the assembled battery 1 in the Z-axis direction will be described with reference to FIG. FIG. 12 shows the wiring of the main circuit line 80 and the communication line 90 when seven battery packs 10 are accommodated in the assembled battery 1.

　図１２に示すように、本実施形態に係る組電池１は、その内部に収容された複数の電池パック１０の主回路端子１４に対して主回路線８０を接続し、電池パック１０の通信端子１５に対して通信線９０を接続している。主回路線８０の端部には主回路コネクタ８１を有し、この主回路コネクタ８１が各主回路端子１４に接続されている。また、主回路線８０はそれぞれの電池パック１０を電気的に接続しているが、その電気的に接続された回路の端部は、総端子２ａ及び総端子２ｂに接続されている。なお、この接続方法は、電池パックを直列につなげるか、並列につなげるか等によって異なるため、図１２に示した接続方法は一例である。 As shown in FIG. 12, the assembled battery 1 according to the present embodiment connects the main circuit line 80 to the main circuit terminals 14 of the plurality of battery packs 10 accommodated therein, and the communication terminals of the battery pack 10. A communication line 90 is connected to 15. A main circuit connector 81 is provided at the end of the main circuit line 80, and the main circuit connector 81 is connected to each main circuit terminal 14. The main circuit line 80 electrically connects the battery packs 10, and the ends of the electrically connected circuits are connected to the total terminal 2 a and the total terminal 2 b. Note that this connection method differs depending on whether the battery packs are connected in series or in parallel, so the connection method shown in FIG. 12 is an example.

　実施形態に示した通り、組電池１では、複数の電池パックを収容し、かつそれらの電池パックを効率的に冷却することが出来る。 As shown in the embodiment, the assembled battery 1 can accommodate a plurality of battery packs and efficiently cool the battery packs.

　また、電池パックは、第一の固定部材と第二の固定部材を介してプレート及びフレームに固定することが出来るため、組立性が向上する。 In addition, since the battery pack can be fixed to the plate and the frame via the first fixing member and the second fixing member, the assemblability is improved.

　さらに、冷媒を流す冷却配管や冷却配管入口、冷却配管出口、冷媒入口、冷媒出口を組電池の高さ方向の下部に設け、電気が流れる主回路線や、主回路端子、総端子を組電池の高さ方向の上部に設けて分離されているため、冷媒の一例とする水漏れ、主回路線などに接触して、ショートなどを起こす可能性を低減することが出来る。 In addition, a cooling pipe that flows refrigerant, a cooling pipe inlet, a cooling pipe outlet, a refrigerant inlet, and a refrigerant outlet are provided in the lower part of the assembled battery in the height direction, and the main circuit line through which electricity flows, the main circuit terminal, and the total terminal are connected to the assembled battery. Therefore, it is possible to reduce the possibility of causing a short circuit due to contact with a water leak, a main circuit line, or the like as an example of the refrigerant.

　<変形例> 
　続いて変形例について図１３を用いて説明する。本変形例は基本的に実施形態と同一の構成であるが、一部異なる部分がある。ここでは実施形態と同一の説明は適宜省略する。 <Modification>
Next, a modification will be described with reference to FIG. This modification has basically the same configuration as that of the embodiment, but there are some differences. Here, the same description as the embodiment is omitted as appropriate.

　上記実施形態では、７個の電池パック１０を有する組電池１について説明したが、本変形例では６個の電池パック１０を有する組電池について説明する。 In the above embodiment, the assembled battery 1 having seven battery packs 10 has been described, but in this modification, an assembled battery having six battery packs 10 will be described.

図１３は、本変形例に係る組電池を構成する複数のプレート１９と複数の冷却配管１００が接続された状態の斜視図である。 FIG. 13 is a perspective view of a state in which a plurality of plates 19 and a plurality of cooling pipes 100 constituting the assembled battery according to this modification are connected.

図１３において、紙面上最も左に位置するプレート１９から、第一のプレート１９－１、第二のプレート１９－２、第三のプレート１９－３とする。 In FIG. 13, the first plate 19-1, the second plate 19-2, and the third plate 19-3 are designated from the leftmost plate 19 in the drawing.

第一のプレート１９－１の両面には、図示していないが２つの電池パック１０が固定される。また、第二のプレート１９－２の両面にも、図示していないが２つの電池パック１０が固定されている。第三のプレート１９－３の両面にも、図示していないが２つの電池パック１０が固定されている。 Although not shown, two battery packs 10 are fixed to both surfaces of the first plate 19-1. In addition, two battery packs 10 are fixed to both surfaces of the second plate 19-2, although not shown. Although not shown, two battery packs 10 are fixed to both surfaces of the third plate 19-3.

冷却配管７０は組電池１の冷却配管入口３ａ及び冷却配管出口３ｂに接続され、そこから各プレート１９の冷却通路５０に接続されている。 The cooling pipe 70 is connected to the cooling pipe inlet 3 a and the cooling pipe outlet 3 b of the assembled battery 1, and is connected to the cooling passage 50 of each plate 19 from there.

本変形例において、まず組電池１のフレーム２０に備わる冷却配管入口３ａは冷却配管７０を介して、第二のプレート１９－２の冷媒入口５０－１に接続されている。また、第二のプレートの冷媒出口５０－２は冷却配管７０を介して、第一のプレート１９－１の冷媒入口５０－１に接続されている。続いて、第一のプレート１９－１の冷媒出口５０－２は冷却配管７０を介して、第三のプレート１９－３の冷媒入口５０－１に接続されている。さらに、第三のプレート１９－３の冷媒出口５０－２は冷却配管７０を介して、フレーム２０に備わる冷却配管出口３ｂに接続されている。 In this modification, first, the cooling pipe inlet 3a provided in the frame 20 of the assembled battery 1 is connected to the refrigerant inlet 50-1 of the second plate 19-2 via the cooling pipe 70. The refrigerant outlet 50-2 of the second plate is connected to the refrigerant inlet 50-1 of the first plate 19-1 via the cooling pipe 70. Subsequently, the refrigerant outlet 50-2 of the first plate 19-1 is connected to the refrigerant inlet 50-1 of the third plate 19-3 via the cooling pipe 70. Further, the refrigerant outlet 50-2 of the third plate 19-3 is connected to the cooling pipe outlet 3b provided in the frame 20 via the cooling pipe 70.

　このように配管をすることで、組電池１の外部から冷却配管入口３ａに冷媒を流入し、その冷媒は冷却配管７０や各プレート１９に備わる冷却通路５０を介して、最終的にその冷媒を冷却配管出口３ｂから組電池１の外部に取り出すことが出来る。これにより、各プレート１９が冷媒により冷却され、各プレート１９に固定された電池パック１０やその内部に収容された電池セル５を冷却することができ、発熱による電池の性能劣化を抑制することが出来る。 By piping in this way, the refrigerant flows into the cooling pipe inlet 3 a from the outside of the assembled battery 1, and the refrigerant finally passes through the cooling pipes 50 and the cooling passages 50 provided in each plate 19. It can be taken out of the assembled battery 1 from the cooling pipe outlet 3b. Thereby, each plate 19 is cooled with a refrigerant | coolant, the battery pack 10 fixed to each plate 19 and the battery cell 5 accommodated in it can be cooled, and it suppresses the performance deterioration of the battery by heat_generation | fever. I can do it.

　また、本変形例では、組電池１のＸ軸方向における中央部に最も近いプレートである第二のプレート１９－２に対して、冷却配管入口３ａから直接に接続されている。よって、最も冷えた冷媒が第二のプレート１９－２の冷却通路５０に流れることになる。第二のプレート１９－２は、組電池１のＸ軸方向における中央部に最も近いプレートであるため、最も発熱しやすい位置にある。そのプレートに対して最も冷えた冷媒を流すことで、効率的に電池パック１０を冷却することが出来る。 Further, in this modification, the battery pack 1 is directly connected to the second plate 19-2, which is the plate closest to the central portion in the X-axis direction, from the cooling pipe inlet 3a. Therefore, the coldest refrigerant flows into the cooling passage 50 of the second plate 19-2. Since the second plate 19-2 is the plate closest to the central portion in the X-axis direction of the assembled battery 1, it is in a position where heat is most easily generated. The battery pack 10 can be efficiently cooled by supplying the coldest coolant to the plate.

　実施形態や変形例に示した通り、組電池１では、複数の電池パックを収容し、かつそれらの電池パックを効率的に冷却することが出来る。 As shown in the embodiments and modifications, the assembled battery 1 can accommodate a plurality of battery packs and efficiently cool those battery packs.

　また、電池パックは、第一の固定部材と第二の固定部材を介してプレート及びフレームに固定することが出来るため、組立性が向上する。 In addition, since the battery pack can be fixed to the plate and the frame via the first fixing member and the second fixing member, the assemblability is improved.

　さらに、冷媒を流す冷却配管や冷却配管入口、冷却配管出口、冷媒入口、冷媒出口を組電池の高さ方向の下部に設け、電気が流れる主回路線や、主回路端子、総端子を組電池の高さ方向の上部に設けて分離されているため、冷媒の一例とする水漏れ、主回路線などに接触して、ショートなどを起こす可能性を低減することが出来る。 In addition, a cooling pipe that flows refrigerant, a cooling pipe inlet, a cooling pipe outlet, a refrigerant inlet, and a refrigerant outlet are provided in the lower part of the assembled battery in the height direction, and the main circuit line through which electricity flows, the main circuit terminal, and the total terminal are connected to the assembled battery. Therefore, it is possible to reduce the possibility of causing a short circuit due to contact with a water leak, a main circuit line, or the like as an example of the refrigerant.

　本発明のいくつかの実施形態を説明したが、これらの実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。 Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

１…組電池、２ａ…総端子、２ｂ…総端子、３ａ…冷却配管入口、３ｂ…冷却配管出口、５…電池セル、６…筐体、７ａ…正極端子、７ｂ…負極端子、１０…電池パック、１８…プレート、１９…プレート、２０…フレーム、４０…接続部、４１…接続部、５０…冷却通路、５１…冷却配管接続部、６０…第一の固定部材、６１…第二の固定部材、７０…冷却配管、８０…主回路線、８１…主回路コネクタ、９０…通信線、１００…冷却配管。 DESCRIPTION OF SYMBOLS 1 ... Assembly battery, 2a ... Total terminal, 2b ... Total terminal, 3a ... Cooling pipe inlet, 3b ... Cooling pipe outlet, 5 ... Battery cell, 6 ... Case, 7a ... Positive electrode terminal, 7b ... Negative electrode terminal, 10 ... Battery Pack, 18 ... Plate, 19 ... Plate, 20 ... Frame, 40 ... Connection, 41 ... Connection, 50 ... Cooling passage, 51 ... Cooling pipe connection, 60 ... First fixing member, 61 ... Second fixing 70, cooling pipe, 80 ... main circuit line, 81 ... main circuit connector, 90 ... communication line, 100 ... cooling pipe.

Claims (3)

　略直方体形状であって、電池セルを収容し、前記電池セルの充放電電流を取り出すための主回路端子を有する複数の第一の筐体と、前記主回路端子同士を接続する主回路線と、前記第一の筐体の所定の面と対向し、冷媒入口と冷媒出口とを有する冷却通路が設けられた複数のプレートと、前記冷却通路同士を接続する冷却配管と、前記プレートの面と垂直な奥行き方向に複数の前記第一の筐体を収容し、前記電池セルの充放電電流を外側に取り出すための総端子と、冷媒を外側に取り出す冷却配管入口と冷却配管出口とを備えた第二の筐体と、を有し、前記主回路端子、前記主回路線、前記総端子を前記第二の筐体の高さ方向の上部に設け、前記冷媒入口、前記冷媒出口、前記冷却配管、前記冷却配管入口、前記冷却配管出口を前記第二の筐体の高さ方向の下部に設ける、組電池。 A plurality of first casings each having a substantially rectangular parallelepiped shape, containing battery cells and having a main circuit terminal for taking out a charge / discharge current of the battery cells, and a main circuit line connecting the main circuit terminals to each other A plurality of plates facing a predetermined surface of the first housing and provided with a cooling passage having a refrigerant inlet and a refrigerant outlet, a cooling pipe connecting the cooling passages, and a surface of the plate A plurality of the first casings are accommodated in a vertical depth direction, and provided with a total terminal for taking out the charge / discharge current of the battery cell to the outside, a cooling pipe inlet and a cooling pipe outlet for taking out the refrigerant to the outside. A second casing, wherein the main circuit terminal, the main circuit line, and the total terminal are provided at an upper portion in the height direction of the second casing, and the refrigerant inlet, the refrigerant outlet, and the cooling A pipe, an inlet of the cooling pipe, and an outlet of the cooling pipe. Provided in the lower portion in the height direction of the body, the battery pack. 　前記プレートは前記第一の筐体の所定の面若しくは所定の面及びそれに対向する面に対向している、請求項１に記載の組電池。 The assembled battery according to claim 1, wherein the plate faces a predetermined surface of the first casing or a predetermined surface and a surface facing the predetermined surface. 　前記冷却配管入口は、前記複数の前記プレートのうち、前記奥行き方向において中央部に近いプレートに設けられた前記冷媒入口に直結して接続されている、請求項１又は請求項２に記載の組電池。 The group according to claim 1, wherein the cooling pipe inlet is directly connected to the refrigerant inlet provided on a plate close to a central portion in the depth direction among the plurality of plates. battery.
PCT/JP2019/013173 2018-03-29 2019-03-27 Battery pack Ceased WO2019189354A1 (en)

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