WO2020031576A1 - 電池モジュールおよび電池パック - Google Patents

電池モジュールおよび電池パック Download PDF

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Publication number
WO2020031576A1
WO2020031576A1 PCT/JP2019/026733 JP2019026733W WO2020031576A1 WO 2020031576 A1 WO2020031576 A1 WO 2020031576A1 JP 2019026733 W JP2019026733 W JP 2019026733W WO 2020031576 A1 WO2020031576 A1 WO 2020031576A1
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WIPO (PCT)
Prior art keywords
battery module
lead plate
cells
adjacent
battery
Prior art date
Application number
PCT/JP2019/026733
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
小野和彦
大津厚
柳沢毅
Original Assignee
本田技研工業株式会社
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 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to JP2020536389A priority Critical patent/JP6997325B2/ja
Priority to CN201980053304.5A priority patent/CN112567569B/zh
Publication of WO2020031576A1 publication Critical patent/WO2020031576A1/ja

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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
    • H01M50/50—Current conducting connections for cells or batteries
    • 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
    • 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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • 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 present invention relates to a battery module formed by stacking a plurality of cylindrical cells in a state where the axial directions of the cells are substantially parallel, and a battery pack having a plurality of battery modules in a case.
  • JP-A-2002-254934 discloses a battery unit in which a plurality of battery assemblies in which a plurality of cylindrical batteries are connected in series are connected in parallel.
  • the present invention has been made in order to solve the above-described problem, and has a simple shape of a conductive plate and a reduced number of types of shapes of the conductive plate to improve the productivity. It is intended to provide a module and a battery pack.
  • the first invention is a battery module 22 or 24 formed by stacking a plurality of cylindrical cells 26 in a state where the axial directions of the cells 26 are substantially parallel, and has the following features. .
  • the unit cells 26 are linearly arranged in a first direction, and are arranged with respect to the first direction.
  • the electrodes of the unit cells 26 that are linearly arranged in a second direction that is oblique and that are adjacent to each other in the first direction have different polarities and that are adjacent to each other in the second direction.
  • the electrodes 26 have the same polarity, and lead plates 30c to 30f for connecting the unit cells 26 adjacent in the first direction in series and connecting the unit cells 26 adjacent in the second direction in parallel, It has 30k to 30n.
  • Second feature when the battery modules 22 and 24 are viewed from the electrode side of the unit cell 26, the plurality of unit cells 26 are arranged in a first region R1 formed in a substantially rectangular shape.
  • the number of the cells 26 arranged in a second region R2 formed in a substantially triangular shape at a corner in one region R1 is arranged in a position adjacent to the second region R2 in the second direction.
  • the number is the same as the number of the unit cells 26 described above.
  • the unit cells 26 are arranged in the second region R2, and are mutually separated in the first direction.
  • the electrodes of the adjacent unit cells 26 have the same polarity.
  • the lead plates 30c to 30f and 30k to 30n are formed in a linear shape substantially parallel to the first direction. And a side surface formed in a straight line substantially parallel to the second direction.
  • An insulating wall 40 is provided between the adjacent lead plates 30c to 30f and 30k to 30n.
  • the second invention is a battery pack 10 having a plurality of the battery modules 22 and 24 in the case 14 and has the following features.
  • one battery module 22 has a positive electrode lead plate 30a connected to only the positive electrode of the adjacent cell 26 in one of the first directions and only the negative electrode of the adjacent cell 26
  • the other battery module 24 disposed adjacent to one battery module 22 has a negative electrode lead plate 30h connected to the other in the first direction, and the other battery module 24 disposed adjacent to the one battery module 22 has only the positive electrode of the adjacent cell 26.
  • One battery includes a positive electrode lead plate 30p connected to the other side of the first direction, and a negative electrode lead plate 30i connected only to the negative electrode of the adjacent unit cell 26 in one side of the first direction.
  • the module 22 and another battery module 24 are connected in series.
  • the positive electrode lead plate 30a serving as an electrode of the battery pack 10
  • the negative electrode lead plate 30i is provided on the same side of the first direction.
  • the productivity of the battery module can be improved.
  • the productivity of the battery module can be improved.
  • the productivity of the battery module can be improved.
  • the productivity of the battery module can be improved.
  • a short circuit between the lead plates can be prevented.
  • the battery module and the adjacent battery module can be easily connected in series.
  • the circuit configuration in the battery pack can be simplified.
  • FIG. 1 is a perspective view of the battery pack.
  • FIG. 2 is a perspective view of the first battery module and the second battery module.
  • FIG. 3 is an exploded perspective view of the first battery module and the second battery module.
  • FIG. 4A is a diagram of the first battery module as viewed from the Y axis negative direction side.
  • FIG. 4B is a view of the first battery module viewed from the Y axis positive direction side.
  • FIG. 5A is a view of the second battery module viewed from the Y axis negative direction side.
  • FIG. 5B is a diagram of the second battery module viewed from the Y axis positive direction side.
  • FIG. 6 is a schematic sectional view taken along line VI-VI in FIGS. 4A and 4B.
  • FIG. 7 is a schematic diagram showing the flow of current in the first battery module and the second battery module.
  • FIG. 1 is a perspective view of the battery pack 10.
  • FIG. 2 is a perspective view of the first battery module 22 and the second battery module 24. 1 and 2 show an X axis, a Y axis, and a Z axis orthogonal to each other. In other drawings described below, X-axis, Y-axis, and Z-axis corresponding to X-axis, Y-axis, and Z-axis in FIGS. 1 and 2 are shown.
  • the battery pack 10 includes a case 14, a first battery module 22 and a second battery module 24 housed inside the case 14.
  • the case 14 includes a top case 16, a bottom case 18, and an outer case 20.
  • FIG. 3 is an exploded perspective view of the first battery module 22 and the second battery module 24.
  • Each of the first battery module 22 and the second battery module 24 has a plurality of cells 26, a cell holder 28 accommodating the cells 26, and lead plates 30a to 30p connecting the cells 26 to each other. .
  • the cell 26 is a lithium ion secondary battery having a cylindrical appearance.
  • the unit cell 26 is not limited to a lithium ion secondary battery, and may be another secondary battery such as a nickel hydride secondary battery or a nickel cadmium secondary battery.
  • the cell holder 28 has a plurality of cylindrical accommodation holes 32 penetrating in the Y-axis direction. The cell 26 is accommodated in the accommodation hole 32 of the cell holder 28.
  • FIG. 4A is a diagram of the first battery module 22 viewed from the Y axis negative direction side.
  • FIG. 4B is a diagram of the first battery module 22 viewed from the Y axis positive direction side.
  • the number of the positive electrodes of the unit cells 26 facing the Y-axis negative direction side is 24, Are arranged so that the number facing the Y axis negative direction side is 18.
  • the number of the unit cells 26 in the state where the positive electrode of the unit cell 26 is directed to the Y-axis positive direction side is 18 in the state of being housed in the housing hole 32 of the first battery module 22.
  • the number of the negative electrodes facing the Y-axis positive direction is 24.
  • the unit cell 26 When the first battery module 22 is viewed from the negative side of the Y-axis direction or the positive side of the Y-axis, the unit cell 26 is disposed in the first region R1 formed in a substantially rectangular shape.
  • the cells 26 are linearly arranged in a first direction substantially parallel to the direction of gravity (Z-axis direction), and are linearly arranged in a second direction that is oblique to the direction of gravity (Z-axis direction). It is arranged in.
  • the first direction may not be a direction substantially parallel to the direction of gravity, and the second direction is not a direction oblique to the direction of gravity if it is a direction oblique to the first direction. May be.
  • first region R1 regions formed by substantially triangles at corners of the first region R1 on the Z axis negative direction side and the positive direction side are referred to as second regions R2a and R2b, respectively.
  • the cells 26 arranged in the second region R2a and the second region R2b have electrodes of the same polarity, respectively. It is provided so that it becomes.
  • the cells 26 arranged in the second region R2a and the second region R2b are provided such that the electrodes of the cells 26 adjacent to each other in the first direction have the same polarity, and Are provided so that the electrodes of the unit cells 26 adjacent to each other in the same direction have the same polarity.
  • the number of the cells 26 arranged in the second region R2a and the second region R2b is six each, and the number of the single cells 26 in the second direction is set at a position adjacent to the second region R2a or the second region R2b.
  • the number is the same as the number (6) of the unit cells 26 arranged.
  • the cells 26 arranged in the third region R3 are the cells 26 adjacent to each other in the first direction.
  • the electrodes are provided so as to have different polarities, and the electrodes of the unit cells 26 adjacent to each other in the second direction are provided so as to have the same polarity.
  • the first battery module 22 has eight lead plates 30a to 30h.
  • the lead plates 30a to 30h are plate members formed of a conductive material.
  • the shapes of the lead plates 30b and 30g are the same, and the shapes of the lead plates 30c to 30f are the same.
  • the lead plate 30a forms a positive electrode lead plate.
  • the lead plate 30a is formed in a substantially triangular shape having a straight line substantially parallel to the first direction and a straight line substantially parallel to the second direction.
  • the lead plate 30a is formed with an electrode portion 34P protruding in the negative Z-axis direction with respect to the cell holder 28.
  • the lead plate 30a is mounted on the negative side of the cell holder 28 in the Y-axis negative direction, and connects the positive electrodes of the cells 26 arranged in the second region R2a on the negative side of the Z-axis in parallel (FIG. 4A).
  • the lead plate 30b is formed in a substantially trapezoidal shape having straight lines substantially parallel to the first direction and straight lines substantially parallel to the second direction on its sides.
  • the lead plate 30b is attached to the positive side of the cell holder 28 in the Y-axis direction, connects the negative electrodes of the unit cells 26 arranged in the second region R2a in parallel, and sets the lead plate 30b at a position adjacent to the second region R2a.
  • the positive electrodes of the unit cells 26 arranged in two directions are connected in parallel.
  • the lead plate 30b connects the negative electrode of the cell 26 arranged in the second region R2a and the positive electrode of the cell 26 arranged in the second direction at a position adjacent to the second region R2a. Connect in series (FIG. 4B).
  • the lead plate 30c is formed in a substantially parallelogram shape having a straight line substantially parallel to the first direction and a straight line substantially parallel to the second direction on its sides.
  • the lead plate 30c is mounted on the negative side of the cell holder 28 in the Y-axis direction, connects the negative electrodes of the cells 26 arranged in the second direction in the third region R3 in parallel, and also in the second direction.
  • the positive electrodes of the arranged cells 26 are connected in parallel.
  • the lead plate 30c connects the negative electrode of the cell 26 arranged in the second direction and the positive electrode of the cell 26 arranged in the second direction in series (FIG. 4A).
  • the lead plate 30d is formed in a substantially parallelogram shape having sides on a straight line substantially parallel to the first direction and a straight line substantially parallel to the second direction.
  • the lead plate 30d is attached to the positive side of the cell holder 28 in the Y-axis direction, connects the negative electrodes of the cells 26 arranged in the second direction in the third region R3 in parallel, and also in the second direction.
  • the positive electrodes of the arranged cells 26 are connected in parallel.
  • the lead plate 30d connects the negative electrode of the cell 26 arranged in the second direction and the positive electrode of the cell 26 arranged in the second direction in series (FIG. 4B).
  • the lead plate 30e is formed in a substantially parallelogram shape having a straight line substantially parallel to the first direction and a straight line substantially parallel to the second direction on its sides.
  • the lead plate 30e is mounted on the negative side of the cell holder 28 in the Y-axis direction, connects the negative electrodes of the cells 26 arranged in the second direction in the third region R3 in parallel, and also in the second direction.
  • the positive electrodes of the arranged cells 26 are connected in parallel.
  • the lead plate 30e connects the negative electrode of the cell 26 arranged in the second direction and the positive electrode of the cell 26 arranged in the second direction in series (FIG. 4A).
  • the lead plate 30f is formed in a substantially parallelogram shape having a straight line substantially parallel to the first direction and a straight line substantially parallel to the second direction on its sides.
  • the lead plate 30f is mounted on the positive side of the cell holder 28 in the Y-axis direction, connects the negative electrodes of the cells 26 arranged in the second direction in the third region R3 in parallel, and also in the second direction.
  • the positive electrodes of the arranged cells 26 are connected in parallel.
  • the lead plate 30f connects the negative electrode of the cell 26 arranged in the second direction and the positive electrode of the cell 26 arranged in the second direction in series (FIG. 4B).
  • the lead plate 30g is formed in a substantially trapezoidal shape having a straight line substantially parallel to the first direction and a straight line substantially parallel to the second direction on its sides.
  • the lead plate 30g is attached to the negative side of the cell holder 28 in the Y-axis direction, connects the positive electrodes of the cells 26 arranged in the second region R2b in parallel, and sets the lead plate at a position adjacent to the second region R2b.
  • the negative electrodes of the unit cells 26 arranged in two directions are connected in parallel.
  • the lead plate 30g connects the positive electrode of the cell 26 arranged in the second region R2b and the negative electrode of the cell 26 arranged in the second direction at a position adjacent to the second region R2b. Connect in series (FIG. 4A).
  • the lead plate 30h constitutes a negative electrode lead plate.
  • the lead plate 30h is formed in a substantially triangular shape having a straight line substantially parallel to the first direction and a straight line substantially parallel to the second direction.
  • the lead plate 30h is formed such that the Z-axis positive direction side is bent from the Y-axis positive direction side of the cell holder 28 along the side surface on the Z-axis positive direction side (FIG. 3).
  • the lead plate 30h is attached on the Y axis positive direction side of the cell holder 28, and connects the negative electrodes of the cells 26 arranged in the second region R2b in parallel (FIG. 4B).
  • FIG. 5A is a view of the second battery module 24 as viewed from the Y axis negative direction side.
  • FIG. 5B is a view of the second battery module 24 viewed from the Y axis positive direction side.
  • the number of the positive electrodes of the unit cells 26 facing the Y-axis negative direction side is 24, Are arranged so that the number facing the Y axis negative direction side is 18. Further, as shown in FIG. 5B, the number of the unit cells 26 which are accommodated in the accommodation holes 32 of the second battery module 24 is 18 when the positive electrodes of the unit cells 26 face the Y axis positive direction side. , The number of the negative electrodes facing the Y-axis positive direction is 24.
  • the unit cell 26 is disposed in the first region R1 formed in a substantially rectangular shape.
  • the cells 26 are linearly arranged in a first direction substantially parallel to the direction of gravity (Z-axis direction), and are linearly arranged in a second direction that is oblique to the direction of gravity (Z-axis direction). It is arranged in.
  • regions formed in the Z-axis negative direction side and the positive direction side of the first region R1a in substantially triangular shapes are second regions R2a and R2b, respectively.
  • the region excluding the second regions R2a and R2b is referred to as a third region R3.
  • the cells 26 arranged in the second region R2a and the second region R2b have electrodes of the same polarity, respectively. It is provided so that it becomes.
  • the cells 26 arranged in the second region R2a and the second region R2b are provided such that the electrodes of the cells 26 adjacent to each other in the first direction have the same polarity, and Are provided so that the electrodes of the unit cells 26 adjacent to each other in the same direction have the same polarity.
  • the number of the cells 26 arranged in the second region R2a and the second region R2b is six each, and the number of the single cells 26 in the second direction is set at a position adjacent to the second region R2a or the second region R2b.
  • the number is the same as the number (6) of the unit cells 26 arranged.
  • the cells 26 arranged in the third region R3 are the cells 26 adjacent to each other in the first direction.
  • the electrodes are provided so as to have different polarities, and the electrodes of the unit cells 26 adjacent to each other in the second direction are provided so as to have the same polarity.
  • the second battery module 24 has eight lead plates 30i to 30p.
  • the lead plates 30i to 30p are plate members formed of a conductive material.
  • the shapes of the lead plates 30j and 30o are the same, and the shapes of the lead plates 30k to 30n are the same.
  • the lead plate 30i constitutes a negative electrode lead plate.
  • the lead plate 30i is formed in a substantially triangular shape having a straight line substantially parallel to the first direction and a straight line substantially parallel to the second direction.
  • the lead plate 30i is formed with an electrode portion 34N protruding in the negative Z-axis direction with respect to the cell holder 28.
  • the lead plate 30i is attached to the positive side of the cell holder 28 in the Y-axis positive direction, and connects the negative electrodes of the cells 26 arranged in the second region R2a on the negative side of the Z-axis in parallel (FIG. 5B).
  • the lead plate 30j is formed in a substantially trapezoidal shape having a straight line substantially parallel to the first direction and a straight line substantially parallel to the second direction on its sides.
  • the lead plate 30j is attached to the negative side of the cell holder 28 in the Y-axis direction, connects the positive electrodes of the cells 26 arranged in the second region R2a in parallel, and places the lead plate 30j at a position adjacent to the second region R2a.
  • the negative electrodes of the unit cells 26 arranged in two directions are connected in parallel.
  • the lead plate 30j connects the positive electrode of the cell 26 arranged in the second region R2a and the negative electrode of the cell 26 arranged in the second direction at a position adjacent to the second region R2a. Connect in series (FIG. 5A).
  • the lead plate 30k is formed in a substantially parallelogram shape having a straight line substantially parallel to the first direction and a straight line substantially parallel to the second direction on its sides.
  • the lead plate 30k is attached to the Y-axis positive direction side of the cell holder 28, and connects the negative electrodes of the cells 26 arranged in the second direction in the third region R3 in parallel, and also in the second direction.
  • the positive electrodes of the arranged cells 26 are connected in parallel.
  • the lead plate 301 connects the negative electrode of the cell 26 arranged in the second direction and the positive electrode of the cell 26 arranged in the second direction in series (FIG. 5B).
  • the lead plate 30l is formed in a substantially parallelogram shape having sides on a straight line substantially parallel to the first direction and a straight line substantially parallel to the second direction.
  • the lead plate 30l is attached to the Y axis negative direction side of the cell holder 28, and connects the negative electrodes of the cells 26 arranged in the second direction in parallel to the third region R3, and also in the second direction.
  • the positive electrodes of the arranged cells 26 are connected in parallel.
  • the lead plate 30k connects the negative electrode of the cell 26 arranged in the second direction and the positive electrode of the cell 26 arranged in the second direction in series (FIG. 5A).
  • the lead plate 30m is formed in a substantially parallelogram shape having a straight line substantially parallel to the first direction and a straight line substantially parallel to the second direction on its sides.
  • the lead plate 30m is attached on the Y axis positive direction side of the cell holder 28, connects the negative electrodes of the unit cells 26 arranged in the second direction in the third region R3 in parallel, and also in the second direction.
  • the positive electrodes of the arranged cells 26 are connected in parallel.
  • the lead plate 30m connects the negative electrode of the unit cell 26 arranged in the second direction and the positive electrode of the unit cell 26 arranged in the second direction in series (FIG. 5B).
  • the lead plate 30n is formed in a substantially parallelogram shape having a straight line substantially parallel to the first direction and a straight line substantially parallel to the second direction on its sides.
  • the lead plate 30n is attached on the Y axis negative direction side of the cell holder 28, connects the negative electrodes of the cells 26 arranged in the second direction in the third region R3 in parallel, and also in the second direction.
  • the positive electrodes of the arranged cells 26 are connected in parallel.
  • the lead plate 30n connects the negative electrode of the cell 26 arranged in the second direction and the positive electrode of the cell 26 arranged in the second direction in series (FIG. 5A).
  • the lead plate 30o is formed in a substantially trapezoidal shape having straight lines substantially parallel to the first direction and straight lines substantially parallel to the second direction on its sides.
  • the lead plate 30o is attached to the Y axis positive direction side of the cell holder 28, connects the negative electrodes of the cells 26 arranged in the second region R2b in parallel, and places the lead plate 30o at a position adjacent to the second region R2b.
  • the positive electrodes of the unit cells 26 arranged in two directions are connected in parallel.
  • the lead plate 30o connects the negative electrode of the cell 26 arranged in the second region R2b and the positive electrode of the cell 26 arranged in the second direction at a position adjacent to the second region R2b. Connect in series (FIG. 5B).
  • the lead plate 30p constitutes a positive electrode lead plate.
  • the lead plate 30p is formed in a substantially triangular shape having a straight line substantially parallel to the first direction and a straight line substantially parallel to the second direction.
  • the lead plate 30p is formed such that the Z-axis positive direction side is bent from the Y-axis negative direction side to the Z-axis positive direction side surface of the cell holder 28 (FIG. 3).
  • the lead plate 30p is attached to the negative side of the cell holder 28 in the Y-axis direction, and connects the positive electrodes of the cells 26 arranged in the second region R2b in parallel (FIG. 5A).
  • FIG. 6 is a schematic sectional view taken along line VI-VI in FIGS. 4A and 4B.
  • the unit cell 26 is not shown as a cross-sectional view.
  • a common cell holder is used for the first battery module 22 and the second battery module 24.
  • the cell holder 28 is formed by assembling two members, a first member 36 and a second member 38, in the Y-axis direction.
  • An insulating wall 40 is formed between adjacent lead plates 30 (for example, the lead plate 30c and the lead plate 30e) attached to the cell holder 28. This prevents a short circuit between the lead plates 30. Further, the insulating wall 40 is formed so as to protrude in an inner peripheral shape of the accommodation hole 32, thereby preventing the unit cell 26 from dropping out of the accommodation hole 32.
  • each of the first battery module 22 and the second battery module 24 is a single assembled battery, and the first battery module 22 and the second battery module 24 are shown in FIGS. As shown, they are connected in series by a connecting lead plate 41.
  • FIG. 7 is a schematic diagram showing the flow of current in the first battery module 22 and the second battery module 24.
  • the current flows through the battery pack 10 through the lead plate 30i ⁇ lead plate 30j ⁇ lead plate 30k ⁇ lead plate 30l ⁇ lead plate 30m ⁇ lead plate 30n ⁇ lead plate 30o ⁇ lead plate 30p ⁇ connection lead plate 41 ⁇ lead plate 30h ⁇
  • the flow will be in the order of the lead plate 30g ⁇ the lead plate 30f ⁇ the lead plate 30e ⁇ the lead plate 30d ⁇ the lead plate 30c ⁇ the lead plate 30b ⁇ the lead plate 30a.
  • both the lead plate 30a as the positive electrode lead plate of the first battery module 22 and the lead plate 30i as the negative electrode lead plate of the second battery module 24 can be arranged on the negative side of the Z axis.
  • the first battery module 22 and the second battery module are configured such that a plurality of cells 26 are connected in parallel, and a plurality of cells 26 connected in parallel form a set, and the plurality of sets of cells 26 are connected in series.
  • the voltage of the battery pack 10 can be increased, and the capacity can be increased.
  • the first battery module 22 or the second battery module 24 is viewed from the electrode side of the unit cell 26.
  • the cells 26 are linearly arranged in a first direction substantially parallel to the direction of gravity, and linearly in a second direction that is oblique to the direction of gravity. In this case, there is a problem that the shape of the lead plate connecting the individual cells 26 becomes complicated, and the productivity of the first battery module 22, the second battery module 24, and the battery pack 10 deteriorates.
  • the lead plates 30c to 30f and 30k to 30n connect the unit cells 26 adjacent in the second direction in parallel, and The unit cells 26 adjacent in the direction are connected in series.
  • the lead plates 30c to 30f and 30k to 30n are formed into a substantially parallelogram having sides substantially parallel to the first direction and sides substantially parallel to the second direction, and the lead plates 30c to 30f and 30k are formed. 30n can be simplified, and the productivity of the first battery module 22, the second battery module 24, and the battery pack 10 can be improved.
  • the plurality of cells 26 are arranged in the first region R1 formed in a substantially rectangular shape, and the corners in the first region R1 are formed.
  • the number of the cells 26 arranged in the second region R2 formed in a substantially triangular portion is the same as the number of the cells 26 arranged in the second direction at a position adjacent to the second region R2. It is.
  • the cells 26 arranged in the second region R2 are connected in parallel by the lead plates 30b, 30g, 30j, and 30o, and are arranged in the second direction at a position adjacent to the second region R2.
  • the unit cells 26 arranged in the direction can be connected in series.
  • the lead plates 30b, 30g, 30j, and 30o are formed in a substantially trapezoidal shape having sides substantially parallel to the first direction and sides substantially parallel to the second direction, and the lead plates 30b, 30g, 30j, and 30o. Can be simplified, and the productivity of the first battery module 22, the second battery module 24, and the battery pack 10 can be improved.
  • the lead plates 30a to 30p have side surfaces formed in a straight line substantially parallel to the first direction, and substantially parallel to the second direction. And a side surface formed in a parallel straight line.
  • the shapes of the lead plates 30a to 30p can be simplified, and the productivity of the first battery module 22, the second battery module 24, and the battery pack 10 can be improved.
  • the cell holder 28 has the insulating wall 40 between the adjacent lead plates 30a to 30p. This can prevent a short circuit between the lead plates 30a to 30p.
  • the first battery module 22 moves the lead plate 30a (positive electrode lead plate) connected to only the positive electrode of the adjacent cell 26 downward in the direction of gravity (negative Z-axis direction).
  • a lead plate 30h (negative electrode lead plate) connected to only the negative electrode of the adjacent cell 26 is provided above the gravity direction (positive Z-axis direction).
  • the second battery module 24 adjacent to the first battery module 22 has a lead plate 30p (positive electrode lead plate) connected to only the positive electrode of the adjacent unit cell 26 above (in the positive Z-axis direction) in the direction of gravity.
  • a lead plate 30i (negative electrode lead plate) connected to only the negative electrode of the adjacent unit cell 26 is provided below the gravity direction (negative Z-axis direction).
  • the lead plate 30h of the first battery module 22 above the gravity direction and the lead plate 30p of the second battery module 24 are connected in series.
  • the lead plate 30h (negative electrode lead plate) of the first battery module 22 and the lead plate 30p (positive electrode lead plate) of the second battery module 24 are both concentrated upward in the direction of gravity.
  • the second battery module 24 can be easily connected in series by the connecting lead plate 41.
  • lead plate 30a positive lead plate
  • lead plate 30h negative lead plate
  • lead plate 30p of first battery module 22 and second battery module 24 connected in series are provided.
  • the lead plate 30i negative electrode lead plate
  • the lead plate 30a positive electrode lead plate
  • the lead plate 30i negative electrode lead plate
  • both the lead plate 30a (positive lead plate) of the first battery module 22 and the lead plate 30i (negative lead plate) of the second battery module 24, which are electrodes of the battery pack 10 are concentrated below in the direction of gravity.
  • the circuit configuration in the battery pack 10 can be simplified.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Battery Mounting, Suspending (AREA)
PCT/JP2019/026733 2018-08-10 2019-07-04 電池モジュールおよび電池パック WO2020031576A1 (ja)

Priority Applications (2)

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JP2020536389A JP6997325B2 (ja) 2018-08-10 2019-07-04 電池モジュールおよび電池パック
CN201980053304.5A CN112567569B (zh) 2018-08-10 2019-07-04 电池模块和电池组

Applications Claiming Priority (2)

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JP2018151804 2018-08-10
JP2018-151804 2018-08-10

Publications (1)

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WO2020031576A1 true WO2020031576A1 (ja) 2020-02-13

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023278397A1 (en) * 2021-06-29 2023-01-05 Dana Myers Battery pack assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008097942A (ja) * 2006-10-10 2008-04-24 Sanyo Electric Co Ltd 組電池
JP2013525942A (ja) * 2010-03-15 2013-06-20 エレクトロンヴォルト， インコーポレーテッド 相互接続モジュールシステム
JP2013232280A (ja) * 2010-11-22 2013-11-14 Yamaha Motor Co Ltd 鞍乗型車両の電池パックおよび鞍乗型車両
JP2016072039A (ja) * 2014-09-29 2016-05-09 豊田合成株式会社 バスバーモジュール
JP2018077933A (ja) * 2016-11-07 2018-05-17 トヨタ自動車株式会社 電池モジュールの製造方法

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Publication number Priority date Publication date Assignee Title
JP4749774B2 (ja) * 2005-06-16 2011-08-17 本田技研工業株式会社 組電池
JP5496746B2 (ja) * 2010-03-31 2014-05-21 三洋電機株式会社 バッテリパック
JP4973824B2 (ja) * 2010-07-30 2012-07-11 パナソニック株式会社 電池モジュール
JP6414139B2 (ja) * 2016-05-24 2018-10-31 トヨタ自動車株式会社 電池パック
JPWO2018061737A1 (ja) * 2016-09-29 2019-07-11 パナソニックＩｐマネジメント株式会社 電池モジュール

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008097942A (ja) * 2006-10-10 2008-04-24 Sanyo Electric Co Ltd 組電池
JP2013525942A (ja) * 2010-03-15 2013-06-20 エレクトロンヴォルト， インコーポレーテッド 相互接続モジュールシステム
JP2013232280A (ja) * 2010-11-22 2013-11-14 Yamaha Motor Co Ltd 鞍乗型車両の電池パックおよび鞍乗型車両
JP2016072039A (ja) * 2014-09-29 2016-05-09 豊田合成株式会社 バスバーモジュール
JP2018077933A (ja) * 2016-11-07 2018-05-17 トヨタ自動車株式会社 電池モジュールの製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023278397A1 (en) * 2021-06-29 2023-01-05 Dana Myers Battery pack assembly

Also Published As

Publication number Publication date
CN112567569A (zh) 2021-03-26
TWI704711B (zh) 2020-09-11
JPWO2020031576A1 (ja) 2021-05-13
TW202015274A (zh) 2020-04-16
CN112567569B (zh) 2023-05-16
JP6997325B2 (ja) 2022-01-17

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