WO2018070334A1 - 電池ユニット - Google Patents

電池ユニット Download PDF

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Publication number
WO2018070334A1
WO2018070334A1 PCT/JP2017/036262 JP2017036262W WO2018070334A1 WO 2018070334 A1 WO2018070334 A1 WO 2018070334A1 JP 2017036262 W JP2017036262 W JP 2017036262W WO 2018070334 A1 WO2018070334 A1 WO 2018070334A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery
fixing
battery module
case
unit
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/JP2017/036262
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
正登 丹羽
山本　康平
秀宏 木下
井上　美光
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.)
Denso Corp
Original Assignee
Denso 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 Denso Corp filed Critical Denso Corp
Priority to US16/342,159 priority Critical patent/US11289761B2/en
Priority to DE112017005190.8T priority patent/DE112017005190B4/de
Publication of WO2018070334A1 publication Critical patent/WO2018070334A1/ja
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
    • 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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • 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
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • 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
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • 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
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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 disclosure relates to a battery unit used in a vehicle such as an automobile.
  • a technology in which a battery module, a control board, and the like are housed in a housing case so that they are integrally packed, thereby forming a battery unit (for example, Patent Document 1).
  • a battery module a plurality of single cells are integrally accommodated in a battery case (battery accommodating member), and in that state, the battery module is fixed to the accommodating case by fastening fastening members such as screws.
  • a plurality of single cells are arranged side by side in the housing case, and the battery module is fixed to the housing case at positions corresponding to both ends of the battery case. It has become so.
  • the present disclosure has been made in view of the above problems, and a main purpose thereof is to provide a battery unit that can suitably perform heat dissipation of a unit cell.
  • a battery module having a plurality of single cells arranged in a line with each other;
  • a housing case for housing the battery module;
  • a battery unit comprising: An intermediate heat dissipating portion that enables heat dissipation from the intermediate position to the housing case is provided at an intermediate position between the plurality of single cells.
  • the heat dissipation performance can be enhanced by providing the intermediate heat dissipation portion at the intermediate position of each unit cell. As a result, the heat dissipation of the unit cell can be suitably performed.
  • the storage case has a bottom portion and a peripheral wall portion, the battery module is disposed on the bottom portion, and the plurality of single cells are disposed side by side along the bottom portion.
  • the bottom portion is provided with a protruding portion extending in a direction orthogonal to the bottom portion at a position corresponding to the intermediate position in a portion where the battery module is disposed,
  • the intermediate heat radiating portion is configured.
  • the intermediate heat dissipating part is provided so as to overlap with the part where the battery module is arranged in the housing case, and the intermediate heat dissipating part can be suitably provided at an intermediate position between the single cells. it can.
  • the heat received by the intermediate heat radiating portion is transmitted to the bottom portion of the housing case, and is further diffused radially in the surface direction of the bottom portion. Therefore, a configuration suitable for improving the heat dissipation performance can be realized.
  • the battery module has a battery housing member that integrally houses the plurality of unit cells, and the battery housing member houses a plurality of units that respectively accommodate the unit cells arranged along the bottom. And an intermediate structure portion having a recess provided between each of the storage portions and separating the storage portions from each other, and the protruding portion is provided so as to enter the recess.
  • the battery housing member is provided with a plurality of housing portions (battery housing portions) with the intermediate structure portion interposed therebetween, and the protruding portion (intermediate heat dissipation portion) so as to enter the concave portion of the intermediate structure portion. Is provided.
  • the heat of each unit cell can be suitably received by the intermediate heat radiating unit while suppressing the influence of heat between the unit cells adjacent to each other.
  • the intermediate structure portion is provided with a coupling portion that is coupled to the distal end side of the projecting portion, thereby fixing the battery housing member to the housing case.
  • a heat transfer path from the unit cell side to the housing case side is formed.
  • bonded with the protrusion part by the side of a storage case is provided in the intermediate
  • the coupling portion has a heat transfer function of directly transferring heat from the unit cell side to the housing case side, and can achieve good heat dissipation performance. Assuming that the coupling part is coupled to the projecting part using a fastening member such as a screw or a bolt, heat transfer by the coupling member is performed, so that heat dissipation through the coupling part can be improved. It is thought that it becomes.
  • the fifth means includes a substrate on which an electrical component for charging and discharging the battery module is mounted, the substrate is disposed on the opposite side to the bottom portion with the battery module interposed therebetween, and the protrusion is In addition, a substrate fixing portion to which the substrate is fixed is provided on the tip side, and the substrate is fixed to the substrate fixing portion.
  • the substrate fixing portion in the protruding portion functions as an intermediate heat radiating portion. Can be granted.
  • the heat on the substrate side can be released through the protruding portion (intermediate heat dissipation portion).
  • the coupling portion is connected to the protruding portion.
  • a part to be coupled and a part (substrate fixing part) to which the substrate is fixed are respectively provided, and a more preferable configuration can be realized for releasing heat from the unit cell.
  • a deformation suppressing plate that suppresses deformation of the battery module is attached to the opposite side of the bottom portion across the battery module, and the protruding portion has the deformation suppressing plate on the tip side thereof.
  • the deformation suppressing plate is fixed to the plate fixing portion.
  • the plate fixing portion in the projecting portion serves as an intermediate heat radiating portion. Functions can be added.
  • fixed part is provided in the protrusion part.
  • a part that couples the coupling part to the projecting part, a part where the substrate is fixed (substrate fixing part), and a part where the deformation suppression plate is fixed (plate fixing part) Are provided, and a more preferable configuration can be realized for releasing heat from the unit cells.
  • a side heat radiating portion is provided at a position opposite to the intermediate heat radiating portion with the unit cell interposed therebetween and serving as a side portion of the battery module. ing.
  • the heat of the unit cell is released by both the intermediate heat radiating portion and the side heat radiating portion.
  • the heat dissipation performance can be further enhanced.
  • the heat distribution in the unit cell can be suppressed by performing heat dissipation on both sides of the unit cell. For example, when the unit cell is enlarged in order to increase the amount of current, the performance degradation due to heat can be more suitably suppressed by performing both-side heat dissipation in each unit cell.
  • the intermediate heat dissipating part and the side heat dissipating part that exist at positions that are both ends of the unit cells in the arrangement direction of the unit cells serve as a fixing unit that fixes the battery module to the housing case. ing.
  • the battery module in which a plurality of single cells are arranged side by side is fixed in the battery arrangement direction with respect to the housing case.
  • the fixing points of the battery modules can be concentrated at the position in the battery arrangement direction, it is possible to eliminate the fixing points on the side orthogonal to the battery arrangement direction, which is advantageous in reducing the size of the battery unit. Can be realized.
  • a surface having the largest area among the outer peripheral surfaces of the cell has a rectangular shape, and the short side portion of the long side portion and the short side portion faces each other. Are arranged side by side.
  • the cells are arranged side by side so that the short side faces each other and the long side faces each other Compared with the case where it does, the former becomes the dead space between single cells smaller. Therefore, it is possible to realize an advantageous structure for reducing the size of the battery unit.
  • FIG. 1 is a perspective view showing the overall configuration of the battery unit
  • FIG. 2 is an exploded perspective view showing the main configuration of the battery unit in an exploded manner.
  • FIG. 3 is a longitudinal sectional view of the battery unit
  • FIG. 4 is a perspective view showing a state where the cover is removed from the battery unit
  • FIG. 5 is a plan view of the base
  • FIG. 6 is a perspective view of the base
  • FIG. 7 is an exploded perspective view of the battery module
  • FIG. 8 is a perspective view of the battery body
  • FIG. 9 is a perspective view of the battery case
  • FIG. 10 is a perspective view of the battery case
  • FIG. 10 is a perspective view of the battery case
  • FIG. 11 is a schematic diagram showing a base and a battery case.
  • FIG. 12 is a perspective view of the temperature sensor
  • 13A is a side view of the battery case as viewed from the side
  • FIG. 13B is a plan view of the battery case and the base.
  • FIG. 14 is a plan view of the battery case
  • FIG. 15 is a longitudinal sectional view of the battery case
  • FIG. 16 is a perspective view showing a state in which the battery module is assembled to the base
  • FIG. 17 is a plan view showing a state in which the battery module is assembled to the base
  • FIG. 18 is a vertical cross-sectional view at a position passing through the coupling portion of the intermediate structure portion
  • FIG. 12 is a perspective view of the temperature sensor
  • 13A is a side view of the battery case as viewed from the side
  • FIG. 13B is a plan view of the battery case and the base.
  • FIG. 14 is a plan view of the battery case
  • FIG. 15 is a longitudinal sectional
  • FIG. 19 is a longitudinal sectional view at a position passing through the insertion hole of the intermediate structure portion
  • FIG. 20 is a plan view showing the arrangement of each unit cell and each fixed part
  • FIG. 21 is a diagram showing a heat dissipation state of the battery module
  • FIG. 22 is a schematic diagram showing a base and a battery case in another example
  • FIG. 23 is a schematic diagram showing a base and a battery case in another example
  • FIG. 24 is a schematic diagram showing a base and a battery case in another example
  • FIG. 25 is a schematic diagram showing a base and a battery case in another example.
  • the power supply system is embodied in a vehicle, and this power supply system is charged and discharged in a power storage unit (power supply unit) for supplying electric power to various on-vehicle electric loads.
  • the vehicle is an internal combustion engine, an in-vehicle ECU that controls the engine and other components, a power generation function that is driven by the rotation of the engine and axle, and a power running function that rotates the engine and axle. ), A power storage unit charged by the power generated by the rotating electrical machine, and various electric loads.
  • a lead storage battery and a lithium ion storage battery are used as the power storage unit of the vehicle.
  • a Li battery unit hereinafter simply referred to as a battery unit
  • a Li battery unit that functions as a lithium ion storage battery will be described in detail.
  • the vertical direction of the battery unit 10 is defined with reference to FIG. 1 in which the battery unit 10 is installed on a horizontal plane.
  • the battery unit 10 includes a battery module 11 having a plurality of can-type cells, a control board 12 for controlling charge / discharge of the battery module 11, and a plate 13 provided along the upper surface of the battery module 11. Terminal modules 14 and 15 in which power is input and output, and a housing case 16 that houses the battery modules 11 and the like.
  • the housing case 16 has a substantially rectangular parallelepiped shape, and includes a base 17 that is fixed to the mounting location of the battery unit 10 and a cover 18 that is attached above the base 17.
  • Each of the base 17 and the cover 18 is made of a metal material such as aluminum, or is made of a synthetic resin material.
  • the battery module 11, the control board 12 and the plate 13 are arranged vertically so that the plate 13 is positioned on the battery module 11 and further the control board 12 is positioned thereon. It is fixed by a fastening member N such as a bolt. More specifically, as shown in FIGS. 3 and 4, the battery module 11 has an upper surface formed in a step shape according to the battery stacking state, and the stepped plate 13 is assembled along the step on the upper surface. It has been.
  • the plate 13 is a deformation suppressing plate for suppressing deformation occurring in the battery module 11, and is made of, for example, a highly rigid metal plate.
  • the control board 12 is assembled above the low position side of the high position side and the low position side of the upper surface of the battery module 11. When viewed in the height direction, the control board 12 and the upper part of the plate 13 are substantially at the same position.
  • the battery module 11, the control board 12, and the like are accommodated in the accommodation case 16 by assembling the cover 18 from above with respect to the base 17.
  • the terminal modules 14 and 15 have output terminals respectively connected to a lead storage battery, a rotating electric machine, and an electric load.
  • the terminal module 14 has an output terminal 21 connected to, for example, a lead storage battery, and an output terminal 22 connected to the rotating electrical machine.
  • Each of these output terminals 21 and 22 is provided integrally with a terminal base 23 formed of an insulating material, and each terminal 21 and 22 is connected to a bus bar 24 that forms a power path.
  • the terminal module 15 has an output terminal 25 connected to an electric load.
  • the output terminal 25 is provided on the terminal block 26, and a bus bar 27 is connected thereto.
  • the base 17 has a bottom plate portion 31 and a peripheral wall portion 32 provided upright from the bottom plate portion 31.
  • the bottom plate portion 31 has a substantially rectangular shape, and a peripheral wall portion 32 is provided so as to surround the peripheral edge portion or the vicinity of the peripheral edge portion.
  • the battery module 11 is assembled so as to face the bottom plate portion 31. When the battery module 11 is assembled on the bottom plate portion 31, the battery module 11 is surrounded by the peripheral wall portion 32.
  • the battery module 11 is configured by arranging the single cells 51 in a line along the bottom plate portion 31, and the base 17 (accommodating case 16) is arranged with the single cells 51.
  • the direction is the longitudinal direction, and the direction orthogonal to the direction is the short direction.
  • the base 17 is provided with a plurality of fixing portions 33 to 35 for fixing the battery module 11, the control board 12, and the plate 13, respectively.
  • These fixing portions 33 to 35 are provided so as to protrude from the bottom plate portion 31 or the peripheral wall portion 32 in a boss shape, and are pedestal portions for fixing the battery module 11, the control board 12, and the plate 13 to predetermined height positions, respectively. It has become.
  • the module fixing part 33 which fixes the battery module 11 is provided in three places of the both-ends position which becomes both ends along one side (this embodiment longitudinal direction) of the baseplate part 31, and the intermediate position between them. Yes. More specifically, two module fixing portions 33 are provided at both ends of the bottom plate portion 31, and the module fixing portion 33 is provided at one location at the intermediate position. Similarly, plate fixing portions 34 for fixing the plate 13 are also provided at three positions of both end positions and an intermediate position along one side of the bottom plate portion. Substrate fixing portions 35 for fixing the control substrate 12 are provided at two positions, one end position and an intermediate position of the bottom plate portion. The number of fixing portions 33 to 35 at each position is arbitrary.
  • Each of the fixed portions 33 to 35 has a flat upper surface extending in the same direction as the bottom surface of the bottom plate portion 31, and screw holes are formed in the upper ends of the fixed portions 33 to 35, respectively.
  • the fixed portions 33 to 35 are in a state in which the fixed portions of the battery module 11, the control board 12, and the plate 13 are in contact with the upper end surfaces thereof, and the respective members are fixed by the fastening member N in this state. It has come to be.
  • an anchor bolt extending upward from the upper end surface is provided in each of the fixing portions 33 to 35, and the battery module 11, the control board 12, and the plate 13 are fixed by fastening to the anchor bolt. May be.
  • each of the fixing portions 33 to 35 is arranged in three places in the longitudinal direction of the base 17 (battery arrangement direction). That is, the fixing portions 33 to 35 are arranged in both end regions A1 and A2 in the longitudinal direction of the base 17 and an intermediate region A3 therebetween. In each of these areas A1 to A3, for each area, the fixing parts belonging thereto are integrally provided so that at least a part thereof is continuously connected.
  • the module fixing portion 33, the plate fixing portion 34, and the substrate fixing portion 35 are provided in one end region A1 and the intermediate region A3, and the module fixing portion 33 and the plate fixing portion 34 are provided in the other end region A2. And are provided.
  • fixing portion X1 the fixing portions 33 to 35 belonging to the end region A1
  • fixing portion X2 the fixing portions 33 and 34 belonging to the end region A2
  • fixing portion X3 The fixing portions 33 to 35 belonging to A3 are collectively referred to as “fixing portion X3”.
  • the fixing parts 33 to 35 are provided in a state of extending from the bottom plate part 31 of the base 17 and being integrated with the peripheral wall part 32. Further, in the fixing portion X ⁇ b> 2, the fixing portions 33 and 34 are provided so as to extend from the bottom plate portion 31 of the base 17 and be integrated with the peripheral wall portion 32.
  • the battery module 11 has a battery stacking portion and a battery stacking portion, and in contrast to these portions, the end region A1 is provided on the battery stacking side, and the end portion Region A2 is provided on the side of the three-tier battery stack.
  • the fixing portions 33 to 35 each have a height from the bottom plate portion 31, in other words, a height position of the upper end with respect to the bottom plate portion 31.
  • the module fixing portion 33 is lower than the upper end of the peripheral wall portion 32. Therefore, the fixing point for fixing the battery module 11 is lower than the peripheral wall portion 32.
  • a part of the plate fixing part 34 is substantially the same height as the upper end of the peripheral wall part 32, and the other part is lower than that according to the level difference of the plate 13. Therefore, a part of the fixing point for fixing the plate 13 is the same position as the peripheral wall part 32, and the other is a position lower than the peripheral wall part 32.
  • the board fixing part 35 is substantially the same height as the upper end of the peripheral wall part 32. Therefore, the fixing point for fixing the control board 12 is in the same position as the peripheral wall portion 32.
  • the heights of the two module fixing portions 33 are the same in the end region A1. In the end region A2, the heights of the two module fixing portions 33 are different.
  • the base 17 is provided with an element base 37 for attaching a semiconductor power element 36 (see FIG. 2) for power control.
  • the element base 37 has a flat upper surface, and the power element 36 is mounted on the upper surface via an insulating sheet 38 (see FIG. 2).
  • the element base 37 is provided at a position adjacent to the battery module 11.
  • the element pedestal portion 37 is a heat radiating portion that releases heat generated in the power element 36 to the outside, and a heat radiating rib is provided below (back side). In this case, the heat generated in the power element 36 is transmitted to the element base 37 and further released to the outside of the unit.
  • the cover 18 includes a top plate portion 41 and a hanging wall portion 42 extending from the top plate portion 41.
  • the cover 18 is assembled to the base 17 in a state in which the peripheral wall portion 32 of the base 17 is placed on the inside of the case and the hanging wall portion 42 of the cover 18 is placed on the inside and outside of the case.
  • the battery module 11 is roughly divided into a plurality of (in the present embodiment, five) unit cells 51, a battery case 52 that houses these unit cells 51, and an insulation that is assembled to the battery case 52.
  • a cover 53 and an exhaust duct 54 provided to overlap the insulating cover 53 are provided on the side of the insulating cover 53 opposite to the battery.
  • a plurality of unit cells 51, a battery case 52 that accommodates the cells 51 in a stacked state, and an insulating cover 53 constitute a battery body Y, and the battery body Y is shown in FIG.
  • the five single cells 51 are all lithium ion storage batteries having a thin rectangular parallelepiped shape. As shown in FIG. 7, each single cell 51 has positive and negative terminals 56 on one side surface, and an exhaust valve 57 is provided between the positive and negative terminals 56. .
  • the exhaust valve 57 is a safety valve that is broken and opened when the internal pressure of the unit cell 51 becomes an abnormal pressure.
  • the exhaust valve 57 is configured by closing a hole opened in the end surface of the outer case of the unit cell 51 with a thin metal film. Has been.
  • the internal pressure of the unit cell 51 becomes abnormal, the gas inside the battery is released to the outside of the battery by breaking the metal film of the exhaust valve 57. Thereby, cell internal pressure falls and the burst of the cell itself is suppressed.
  • the battery case 52 is a battery housing member that houses five unit cells 51 and is arranged in a predetermined stacked state, and is made of, for example, an insulating synthetic resin material. 9 and 10 are perspective views of the battery case 52 as seen from different directions.
  • the battery case 52 has an outer peripheral portion 61 that surrounds the periphery, and a plurality of partition portions 62 provided between the unit cells 51 that are stacked one above the other.
  • the partition part 62 corresponds to an intermediate partition part.
  • the outer peripheral portion 61 and the partition portion 62 form five battery accommodating portions 63 for each unit cell 51.
  • the battery accommodating part 63 is opened on one surface side of the case side part, and the unit cell 51 is inserted through the opening part 64.
  • five unit cells 51 are divided into a two-tier battery group and a three-tier battery group and arranged side by side, that is, in a direction along the bottom plate portion 31 of the base 17.
  • the five battery housing parts 63 are provided side by side in two-tiered and three-tiered parts.
  • the outer peripheral portion 61 includes a lower plate portion 61 a that becomes the lower surface portion of the battery module 11 and faces the bottom plate portion 31 of the base 17, and an upper plate portion 61 b that becomes the upper surface portion of the battery module 11.
  • the five unit cells 51 are divided into a two-tier battery group and a three-tier battery group, and the upper surface portion (upper plate portion 61 b) of the outer peripheral portion 61 has a single cell. A step corresponding to the thickness of one battery is formed.
  • Each cell 51 has a pair of maximum surfaces in which the thickness dimension in the stacking direction is smaller than the width dimension in the direction orthogonal to the stacking direction and the area is maximum on the battery outer peripheral surface.
  • the single cells 51 are arranged so that one of the pair of maximum surfaces (the lower side in the figure) is the bottom plate part 31 side and the other (the upper side in the figure) is the opposite side of the bottom plate part 31. It is accommodated in a stacked manner. That is, in this embodiment, it is set as the structure which lays the plate-shaped cell 51 sideways, makes it sideways, and arranges in that state.
  • Each unit cell 51 has a rectangular shape in a plan view and is arranged in the longitudinal direction. That is, the unit cell 51 is arranged such that the surface having the largest area among the outer peripheral surfaces of the battery is a rectangle, and the short side portion of the long side portion and the short side portion of the surface is opposed to each other. Has been placed.
  • the battery case 52 has projecting portions 65 (65A, 65B) projecting from the outer surface at both end portions in the longitudinal direction.
  • the protruding portion 65 is a fastening portion that is fastened by the fastening member N, and particularly corresponds to a module fixing fastening portion that fixes the battery module 11 to the base 17.
  • Two protrusions 65 are provided at both ends in the longitudinal direction of the battery case 52, and are fastened to the module fixing part 33 of the base 17 by fastening members N, respectively. Note that a fastening portion is not provided on the back side of the battery case 52 (the side opposite to the opening 64).
  • the protruding portion 65 is provided on a portion of the outer surface of the battery case 52 where the terminal 56 of the unit cell 51 is not provided.
  • the protrusion 65 has a through-hole penetrating in the vertical direction, and a cylindrical metal collar 66 is incorporated in the through-hole as a reinforcing member.
  • the projecting portions 65A provided on the battery stacking side have the same height position (see FIG. 10). Further, the protrusions 65B provided on the side of the three-stage battery stack are different in height position (see FIG. 9).
  • the protruding portion 65A on the battery stacking side is fixed to the module fixing portion 33 in the end region A1 of the base 17, so The protrusion 65B on the side of the base 17 is fixed to the module fixing portion 33 in the end region A2 of the base 17.
  • each protrusion 65 will be further described with reference to FIG.
  • the battery case 52 is provided with the partition portions 62 that partition the battery accommodating portions 63 in the battery stacking direction, and the protrusions 65 are provided at positions on the extension lines of the partition portions 62 on the outer surface of the case. ing.
  • two projecting portions 65A are provided at a position on the extension line of the partition 62 between the upper and lower two-stage battery accommodating portions 63.
  • one protrusion 65 ⁇ / b> B is provided at a position on each extension line of the two partition parts 62 between the upper and lower battery accommodating parts 63.
  • the protrusions 65 ⁇ / b> B are distributed and arranged in the two partition parts 62. Further, at this time, the projecting portions 65B are respectively provided on the extended lines of the partition portions 62 on both sides with the intermediate unit cell 51 interposed therebetween.
  • FIG. 11 a state in which the protrusions 65 ⁇ / b> A and 65 ⁇ / b> B are fixed on the module fixing portion 33 is shown.
  • Each protrusion 65 is formed to protrude from the outer surface of the battery case 52, and is a fastening part to which a fastening member N such as a screw or a bolt is fastened. Therefore, each protrusion 65 has a higher strength than other parts. Further, since the collar 66 is incorporated in each protrusion 65, the strength is further increased.
  • the battery case 52 it is conceivable that the battery cell 52 becomes high temperature due to the heat generated by the unit cell 51, and the partition part 62 expands and contracts. Since it is provided, the expansion and contraction of the partition part 62 is suppressed.
  • a flange 69 is formed around the opening 64 so as to protrude from the outer surface of the case and extend outward in both ends in the longitudinal direction.
  • Each flange 69 is provided with a fastening portion 70 to which the insulating cover 53 is attached by fastening the fastening member N at two locations on the upper and lower sides.
  • the fastening portion 70 is a portion corresponding to a cover fixing fastening portion that fixes the insulating cover 53 to the battery case 52.
  • the fastening portion 70 has a through-hole penetrating in the cover assembling direction, and a cylindrical metal collar 71 is incorporated in the through-hole as a reinforcing member.
  • the collar 71 may be formed with a female screw.
  • the battery case 52 is provided with an opening 73 at one side end in the longitudinal direction thereof, and the opening 73 is used as a sensor mounting portion.
  • a temperature sensor 74 for detecting temperature is attached.
  • the opening 73 corresponds to the middle unit cell 51 which is the middle stage of the upper and lower three-stage unit cells 51, on the three-stage side of the two-stage battery side and the three-stage battery side. It is provided in the position to do. Further, the opening 73 is provided at a position close to the protruding portion 65B, particularly at a position between the two protruding portions 65B in the present embodiment. Therefore, since the protrusion 65B is provided so as to protrude from the outer surface of the battery case 52, the temperature sensor 74 is attached at a position recessed from the position of the protrusion tip side of the protrusion 65B. .
  • the configuration of the temperature sensor 74 will be described with reference to FIG.
  • the temperature sensor 74 has two element portions 75 (thermistors), and engaging portions 76 are provided at both ends of each element portion 75.
  • the temperature sensor 74 is assembled to the battery case 52 by engaging the engaging portion 76 with the peripheral portion of the opening 73.
  • the engaging portion 76 has an elastic force, and the elastic force causes the element portion 75 to be urged toward the unit cell 51 and to be pressed against the outer surface of the unit cell 51.
  • a terminal part 77 is attached to each element part 75, and a harness H is connected to the terminal part 77 (see FIG. 8).
  • two element portions 75 are provided for the same unit cell 51 in the stacking direction of the unit cells 51 (also in the battery thickness direction).
  • FIG. 13A and 13B are schematic views showing the mounting position of the temperature sensor 74 in the battery case 52, where FIG. 13A is a side view of the battery case 52 viewed from the side, and FIG. 13B is a side view of the battery case 52 and the base 17. It is a top view.
  • the height position of the temperature sensor 74 is lower than the upper end of the protrusion 65B (that is, closer to the bottom plate 31 than the end opposite to the bottom plate 31). Position).
  • the temperature sensor 74 is arranged in a region R from the protruding portion 65B to the bottom plate portion 31 when viewed in the height direction.
  • the height position of the temperature sensor 74 is higher than the upper end portion of the projecting portion 65B as long as it is a position between the two projecting portions 65B when viewed in the lateral direction (the surface direction of the bottom plate portion 31 of the base 17). It may be the position.
  • the protrusion 65B is located inside the portion 32.
  • the protrusion 65B is a high-strength part as described above. Therefore, if the protruding portion 65B is positioned inside the peripheral wall portion 32, even if the peripheral wall portion 32 is pressed by an external force and the deformation occurs or is likely to be deformed, the inner protruding portion 65B The deformation of the peripheral wall portion 32 is suppressed. Therefore, it is possible to prevent the temperature sensor 74 from being troubled by an external force.
  • the protrusion dimension of the temperature sensor 74 to the peripheral wall part 32 side is a thing smaller than the protrusion dimension of the protrusion part 65B.
  • the battery case 52 has a plurality of side portions that are oriented to cross each other, and one of the side portions has a plurality of protruding portions 65 ⁇ / b> B in the lateral direction of the peripheral wall portion 32. Is provided. A temperature sensor 74 is attached at a position between the plurality of protrusions 65B.
  • the insulating cover 53 is attached from the opening 64 side of the battery case 52 in a state where the cell 51 is accommodated in the battery case 52.
  • the insulating cover 53 is provided with a plurality of fastening portions 91 at positions corresponding to the fastening portions 70 of the battery case 52.
  • the battery case 52 and the insulating cover 53 are assembled by fastening with the fastening members N at the fastening portions 70 and 91.
  • the insulating cover 53 is provided with a plurality of (in this embodiment, ten) openings 92 into which the respective terminals 56 of the single cells 51 are inserted, and the openings 92 are closed so as to close the openings 92.
  • a plurality of bus bars 93 are attached respectively. These bus bars 93 connect the single cells 51 in series with each other.
  • the insulating cover 53 is provided with five openings 94 corresponding to the positions of the exhaust valves 57 of the single cells 51.
  • a packing 95 is assembled between the unit cell 51 and the insulating cover 53. When the packing 95 is assembled, the opening 94 of the insulating cover 53 and the opening of the packing 95 are communicated with each other. It has become.
  • FIG. 14 is a plan view of the battery case 52
  • FIG. 15 is a longitudinal sectional view of the battery case 52.
  • FIG. 15 is a sectional view taken along line 15-15 in FIG.
  • the intermediate structure portion 81 connects the two-stage battery accommodating portion 63 and the three-stage battery accommodating portion 63, while separating the battery accommodating portions 63 from each other.
  • An intermediate recess 82 is provided.
  • the intermediate recess 82 is a portion that opens downward and forms a space Z that extends in a direction orthogonal to the battery arrangement direction.
  • a fixed portion X3 (see FIGS. 5 and 6) of the intermediate region A3 formed to protrude from the bottom plate portion 31 of the base 17 enters from below.
  • the module fixing portion 33, the plate fixing portion 34, and the substrate fixing portion 35 enter the intermediate recess 82 from below.
  • the intermediate structure portion 81 is provided with a coupling portion 83 that is coupled to the distal end side of the module fixing portion 33.
  • the coupling portion 83 has a through hole penetrating in the vertical direction, and a cylindrical metal collar 84 is incorporated as a reinforcing member in the through hole.
  • the intermediate structure portion 81 is provided with insertion holes 85 and 86 through which the plate fixing portion 34 and the substrate fixing portion 35 in the intermediate region A3 are inserted, respectively. These insertion holes 85 and 86 are provided one on each side with the coupling portion 83 interposed therebetween.
  • the plate fixing portion 34 and the substrate fixing portion 35 are higher than the module fixing portion 33 (see FIG. 6). Therefore, in a state where the battery module 11 is assembled to the base 17, the plate fixing portion 34 and the substrate fixing portion 35 extend upward through the insertion holes 85, 86, and their tip ends are exposed above the battery case 52. (See FIG. 16). The front ends of the plate fixing portion 34 and the substrate fixing portion 35 extend above the battery case 52. In this state, the plate 13 and the control board 12 are fixed to the plate fixing part 34 and the board fixing part 35.
  • the exhaust duct 54 has a recovery space for recovering gas and electrolyte flowing out from the inside of the battery when the exhaust valve 57 of each unit cell 51 is opened. Further, the exhaust duct 54 has a voltage output path for outputting the terminal voltage of each unit cell 51 to the control board 12 with respect to the assembled battery in which the five unit cells 51 are connected in series.
  • FIG. 17 is a plan view showing a state in which the battery module 11 is assembled to the base 17.
  • FIG. 18 is a longitudinal sectional view at a position passing through the coupling portion 83 of the intermediate structure portion 81, which corresponds to a cross section taken along line 18-18 of FIG.
  • FIG. 19 is a vertical cross-sectional view at a position passing through the module fixing portion 33 in the end regions A1 and A2, which corresponds to a cross section along line 19-19 in FIG.
  • the fixed portion X1 of the end region A1 and the fixed portion X2 of the end region A2 are located on both ends in the longitudinal direction.
  • the fixed portion X3 of the intermediate region A3 is located in the middle portion in the longitudinal direction.
  • the fixed portions X1 to X3 are provided as heat radiating portions on both end sides of the single cells 51 as viewed in the longitudinal direction of the battery module 11, and the single cells 51 are provided via the fixed portions X1 to X3. The heat can be released.
  • the fixing part X3 of the intermediate region A3 will be described.
  • the heat of each unit cell 51 heat of the battery module 11
  • the coupling part 83 of the intermediate structure part 81 heat is transferred from the adjacent single cells 51 in the space Z of the recess 82.
  • heat is transferred from each unit cell 51 adjacent in the space Z of the intermediate recess 82. Therefore, suitable heat radiation is possible even at the central position where battery heat is likely to accumulate in the battery module 11.
  • the fixed portion X3 of the intermediate region A3 corresponds to an “intermediate heat dissipation portion”.
  • the fixing portions X1 and X2 of the end regions A1 and A2 correspond to “side heat radiating portions”.
  • each unit cell 51 and each fixed portion X1 to X3 may have the following positional relationship.
  • FIG. 20 is a plan view showing the arrangement of the single cells 51 and the fixing portions X1 to X3.
  • * indicates the center positions of the single cells 51 and the fixing portions X1 to X3.
  • the center position of each of the fixing portions X1 to X3 in the direction orthogonal to the cell arrangement direction in the plan view (up and down direction in the figure) is preferably located at a position overlapping the side surface range of the unit cell 51. This is not a limitation as long as the side faces the fixing portions X1 to X3 as the heat radiating portions.
  • the battery module 11 is dissipated as shown in FIG. 21.
  • heat is radiated to the peripheral wall portion 32 and the like via the fixing portions X1 and X2 on both sides.
  • heat is radiated from the upper surface and the lower surface, which are the maximum surfaces of each unit cell 51, and heat is radiated to the bottom plate portion 31 and the plate 13 via the fixed portion X ⁇ b> 3 at the center portion. Done.
  • a protruding portion 65 ⁇ / b> B as a fastening portion that is fastened by the fastening member N is disposed inside the peripheral wall portion 32, and the temperature sensor 74 is attached to a position aligned with the protruding portion 65 ⁇ / b> B in the battery case 52.
  • the deformation of the peripheral wall portion 32 is suppressed by the inner protruding portion 65B. That is, deformation or the like of the peripheral wall portion 32 on the front side of the temperature sensor 74 is suppressed. For this reason, it is possible to prevent the temperature sensor 74 attached to the outer surface portion of the battery case 52 from being troubled by an external force. As described above, the temperature sensor 74 can be suitably protected in the battery module 11.
  • the housing case 16 is constituted by the base 17 and the cover 18 and the temperature sensor 74 is housed integrally with the battery module 11 in the housing case 16, the temperature sensor 74 is properly set regardless of the direction of the external force. Can be protected. By improving the protection performance of the temperature sensor 74, temperature measurement accuracy and temperature measurement reliability can be ensured.
  • the temperature sensor 74 can be arrange
  • the projecting portion 65B as the module fixing fastening portion is fixed to the module fixing portion 33 having a fixing point at a position above the bottom plate portion 31.
  • a protective space for protecting the temperature sensor 74 is preferably provided between the peripheral wall portion 32 and the battery case 52 by setting the position of the protruding portion 65B to be higher than the bottom plate portion 31. Can do. That is, by moving the position of the protruding portion 65B away from the bottom plate portion 31, even if an external force is applied near the upper end portion of the peripheral wall portion 32, the influence on the temperature sensor 74 can be suppressed.
  • the module fixing portion 33 is configured to extend from the bottom plate portion 31 of the base 17 and be provided integrally with the peripheral wall portion 32. Therefore, the strength of the fixing portion itself increases, and as a result, the strength of the protruding portion 65B (module fixing fastening portion) fixed to the module fixing portion 33 can be increased. Thereby, the reliability in protecting the temperature sensor 74 can be further improved.
  • the temperature sensor 74 Since the temperature sensor 74 is attached to a position below the upper end of the protrusion 65B, the temperature sensor 74 is disposed in the region from the protrusion 65B to the bottom plate 31 as viewed in the height direction. Therefore, further optimization can be realized in protecting the temperature sensor 74.
  • the temperature sensor 74 is attached to a position between the plurality of protruding portions 65B on the side portion of the battery case 52. Thereby, the protective space for protecting the temperature sensor 74 between the surrounding wall part 32 and the battery case 52 can be further strengthened.
  • the projecting portion 65B is provided at a position on the extended line where the partition portion 62 extends on the outer surface of the battery case 52. Thereby, even if the expansion / contraction action occurs in the partition part 62 due to the heat of the unit cell 51, the expansion / contraction is suppressed by the protruding part 65B.
  • the protrusion 65B can be provided with a protection function for the temperature sensor 74 and a deformation suppression function for the battery case 52.
  • the projecting dimension of the temperature sensor 74 toward the peripheral wall part 32 is set to be smaller than the projecting dimension of the projecting part 65B. Thereby, the separation distance from the surrounding wall part 32 to the temperature sensor 74 can be enlarged, and a suitable configuration for protecting the temperature sensor 74 can be realized.
  • a structure part such as an insulating part or a bus bar is provided at the part where the terminal 56 (electrode) of the single cell 51 is provided.
  • the portion where the terminal 56 is provided is disposed in a portion near the center of the unit that is away from the peripheral wall portion 32.
  • the portion of the outer surface portion of the battery case 52 on the side where the terminal 56 of the single cell 51 is not provided is close to the peripheral wall portion 32 and the structure portion is not provided.
  • the protruding portion 65 (fastening portion) is provided in a portion of the outer surface portion of the battery case 52 where the terminal 56 of the unit cell 51 is not provided, and the temperature sensor 74 is provided in the vicinity of the protruding portion 65, the peripheral wall portion.
  • the temperature sensor 74 can be suitably protected when an external force is generated on the H.32.
  • the intermediate-stage single cells 51 When the single cells 51 are stacked in three or more stages, there is a concern that the intermediate-stage single cells 51 will be particularly hot. In this regard, since the temperature sensor 74 is attached at a position corresponding to the intermediate-stage unit cell 51, the temperature of the unit cell 51 can be appropriately managed.
  • the temperature sensor 74 is provided with two element parts 75, and the element part 75 detects the temperature of the same cell 51. Thereby, even if it is assumed that an abnormality occurs in the element unit 75, the reliability of temperature detection can be increased.
  • the fixing portion X3 is provided as an intermediate heat dissipation portion at an intermediate position of each unit cell 51, the heat dissipation performance can be improved. As a result, the heat dissipation of the unit cell 51 can be suitably performed.
  • the base plate portion 31 of the base 17 is provided with a fixing portion X3 including fixing portions 33 to 35 so as to overlap with a portion where the battery module 11 is disposed.
  • the heat received by the fixing portion X3 is transmitted to the bottom plate portion 31 of the base 17 and further diffused radially in the surface direction of the bottom plate portion 31. Therefore, a configuration suitable for improving the heat dissipation performance can be realized.
  • the intermediate structure 81 is provided at a position between the plurality of battery accommodating parts 63 arranged side by side, and the fixing portion X3 (intermediate heat dissipation part) is provided so as to enter the intermediate recess 82 of the intermediate structure. It was.
  • the heat of each unit cell 51 can be suitably received by the fixed portion X3 (intermediate heat dissipation unit) while suppressing the influence of heat between the adjacent unit cells.
  • the intermediate structure portion 81 is provided with a coupling portion 83 coupled to the distal end side of the module fixing portion 33, and the coupling portion 83 forms a heat transfer path from the unit cell 51 side to the base 17 side. .
  • the battery case 52 can be firmly fixed at the intermediate position. Thereby, the battery module 11 can be stably held in the housing case 16.
  • the coupling portion 83 has a heat transfer function of directly transferring heat from the unit cell 51 side to the base 17 side, and can realize good heat dissipation performance. Assuming that the coupling portion 83 is coupled to the module fixing portion 33 using a fastening member N such as a screw or a bolt, heat transfer is performed by the fastening member N, and thus heat dissipation via the coupling portion 83 is performed. It is thought that it becomes possible to improve the sex.
  • a fastening member N such as a screw or a bolt
  • the control board 12 is arranged on the opposite side of the bottom plate part 31 with the battery module 11 in between, and the board fixing part 35 is included in the fixing part X3.
  • the substrate fixing part 35 can be given a function as an intermediate heat radiating part.
  • the plate 13 is disposed on the opposite side of the bottom plate portion 31 with the battery module 11 interposed therebetween, and the plate fixing portion 34 is included in the fixing portion X3.
  • the plate fixing portion 34 can be given a function as an intermediate heat radiating portion.
  • the intermediate structure portion 81 is provided with the coupling portion 83 coupled to the module fixing portion 33 and the insertion holes 85 and 86 through which the plate fixing portion 34 and the substrate fixing portion 35 are inserted.
  • a more suitable configuration can be realized for escape.
  • the heat of the unit cell 51 is released at both the intermediate position and the end position of the battery case 52.
  • by performing heat radiation on both sides of the unit cell 51 it is possible to suppress the uneven distribution of heat in the unit cell 51. For example, when the unit cell 51 is enlarged in order to increase the amount of current, the performance degradation due to heat can be more preferably suppressed by performing both-side heat dissipation in each unit cell 51.
  • the fixing points of the battery modules 11 are concentrated at positions in the battery arrangement direction. be able to. Therefore, the fixed point on the side orthogonal to the battery arrangement direction can be eliminated, and an advantageous configuration can be realized for reducing the size of the battery unit 10.
  • the unit cells 51 having a rectangular shape in a plan view are arranged in the longitudinal direction. That is, the short sides of the single cells 51 are adjacent to each other. Thereby, the enlargement of the battery unit 10 by dead space can be suppressed, ensuring the space of the fixing
  • Supplementary information about the arrangement of the cells 51 in the battery module 11 will be provided.
  • the battery unit 10 may be enlarged.
  • the single cells 51 are arranged side by side so that the short sides of the single cells 51 face each other, the size of the battery unit 10 can be suppressed. .
  • the former is The dead space between the single cells 51 is reduced. Therefore, it is possible to realize an advantageous configuration for reducing the size of the battery unit 10.
  • the projecting portion 65 serving as a fastening portion is provided at a position on the outer surface portion of the battery case 52 on the extension line of the partition portion 62. Therefore, even if the expansion / contraction action occurs in the partition 62 due to the temperature change of the unit cell 51, the expansion / contraction is suppressed by the protrusion 65.
  • the protruding portion 65B is provided at a position on the extension line of the partition portion 62 while corresponding to the intermediate cell 51 among the plurality of cells 51 stacked in three stages, the intermediate cell 51 Then, in consideration of the concern about the influence of heat, the expansion and contraction (expansion and contraction) of the partition 62 can be appropriately suppressed. Thereby, the stress which generate
  • the projecting portions 65 (fastening portions) are provided on the extended lines of the two partition portions 62 on the side laminated in three stages.
  • the protrusions 65 are dispersedly arranged with respect to the partition parts 62, the effect of suppressing expansion and contraction due to temperature changes can be obtained as a whole of the battery case 52.
  • the projecting portions 65 are provided on the extended lines of the partition portions 62 on both sides of the intermediate unit cell 51, respectively. In this case, a more appropriate expansion / contraction suppression function can be provided around the intermediate stage cell 51 in which the influence of heat is particularly concerned.
  • the module fixing portion 33 is provided so as to extend from the bottom plate portion 31 and be integrated with the peripheral wall portion 32, the strength of the protruding portion 65 fixed to the module fixing portion 33 can be increased, and the partition portion In order to suppress the expansion and contraction of 62, a more appropriate configuration can be realized.
  • the protruding portion 65 (module fixing fastening portion) and the temperature sensor 74 may be arranged as shown in FIG. In FIG. 22, one protrusion 65 is provided on each side of the battery case 52. And the temperature sensor 74 is arrange
  • the position where the temperature sensor 74 is provided in the battery case 52 may be a position in the vicinity of the protrusion 65 on the same side as the protrusion 65.
  • the temperature sensor 74 may be provided at a position on the bottom plate portion 31 side of the base 17 with respect to the protruding portion 65.
  • Temperature sensors 74 may be provided on the two side portions of the battery case 52, respectively.
  • the protruding portion 65 (module fixing fastening portion) may be provided so as to straddle two or more partition portions 62 adjacent in the stacking direction of the unit cells 51.
  • the protruding portion 65 ⁇ / b> C is provided so as to reach both of the two partition portions 62 on the side of the unit cells 51 stacked in three stages.
  • the temperature sensor 74 may be provided at a side-by-side position of the protrusion 65C.
  • the protrusion 65C can collectively impart the expansion / contraction suppression function for the two or more partition sections 62, and can increase the expansion / contraction suppression function by increasing the size of the protrusion 65C. it can.
  • the configuration for protecting the temperature sensor 74 can be optimized.
  • FIG. 24 shows a configuration of the battery case 52 in the case where the unit cells 51 are stacked in four stages.
  • four stages of battery housing portions 63 are provided in the vertical direction with respect to the bottom plate portion 31 of the base 17, and each battery housing portion 63 is partitioned by three partition portions 62.
  • the protrusion part 65 is arrange
  • a combination with the configuration of FIG. 23 is also possible, and any of the protrusions 65 may have a length that extends over two or more partition parts 62.
  • the battery case 52 is provided with a flange 69 so as to protrude sideways, and a fastening portion 70 (cover fixing fastening portion) is provided on the flange 69 (see FIGS. 9 and 10).
  • the relationship between the fastening portion 70 and the temperature sensor 74 is similar to the relationship between the protruding portion 65B of the battery case 52 and the temperature sensor 74, and the position on the protruding tip side of the fastening portion 70 (the protruding tip of the flange 69).
  • the temperature sensor 74 is configured to be attached at a position recessed from the side position.
  • the fastening portion 70 is a high-strength portion similar to the protruding portion 65B.
  • the fastening portion 70 is located inside the peripheral wall portion 32, the peripheral wall portion 32 is temporarily pressed by an external force and deformed. Even if it occurs or is likely to be deformed, deformation of the peripheral wall portion 32 is suppressed by the inner fastening portion 70. Therefore, it is possible to prevent the temperature sensor 74 from being troubled by an external force.
  • the effect of protecting the temperature sensor 74 can be expected by the fastening portion 70 as well as the protruding portion 65B. From this point, it is preferable that the temperature sensor 74 is attached to a position aligned with the fastening portion 70 on the outer surface portion of the battery case 52. That is, even if the protrusion 65B is not provided in the vicinity of the temperature sensor 74 at the side end of the battery case 52, the temperature sensor 74 can be protected by the fastening portion 70 formed on the flange 69.
  • the structure of the heat dissipation part in the battery unit 10 may be changed as follows.
  • heat dissipating members 101 and 102 as side heat dissipating portions are provided on both sides of each side-by-side unit cell 51, and a heat dissipating member 103 as an intermediate heat dissipating unit is provided at an intermediate position of each unit cell 51. It is set as the structure which provides.
  • the heat radiating member 103 is composed of a plurality of members provided individually with respect to the bottom plate portion 31.
  • Each of the heat radiating members 101 to 103 may not have a fixing function for fixing the battery module 11 or the like.
  • the protrusion 65 may be provided at a position on the extension line of the partition 62, and the protrusion 65 may be provided on both sides in the extending direction of the partition 62.
  • the unit cells 51 that are rectangular in plan view are arranged side by side in the longitudinal direction, but this may be changed and the unit cells 51 may be arranged in the short direction. Good. Moreover, the unit cell 51 may have a square shape in plan view. Further, in the battery module 11, instead of the configuration in which the plurality of single cells 51 are stacked in the horizontal direction on the bottom plate portion 31 of the base 17, the plurality of single cells 51 may be stacked in the vertical direction. .
  • a configuration using a lithium ion storage battery as a single battery a configuration using another secondary battery such as a nickel cadmium storage battery or a nickel hydride storage battery may be used as the single battery.
  • the battery unit 10 can be used for purposes other than vehicles.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)
PCT/JP2017/036262 2016-10-14 2017-10-05 電池ユニット Ceased WO2018070334A1 (ja)

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DE112017005190.8T DE112017005190B4 (de) 2016-10-14 2017-10-05 Batterieeinheit

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JP6904045B2 (ja) 2017-05-08 2021-07-14 株式会社デンソー 電池パック
JP6683777B2 (ja) 2018-08-28 2020-04-22 本田技研工業株式会社 バッテリケースの固定構造
JP2022096729A (ja) * 2020-12-18 2022-06-30 Fdk株式会社 電池ユニット、及び、当該電池ユニットを含む蓄電システム

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JP2002184374A (ja) * 2000-12-12 2002-06-28 Honda Motor Co Ltd 電池パック
JP2011049012A (ja) * 2009-08-26 2011-03-10 Sanyo Electric Co Ltd バッテリパック
JP2014013725A (ja) * 2012-07-05 2014-01-23 Denso Corp 電池ユニット

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KR101749190B1 (ko) * 2013-05-29 2017-07-03 삼성에스디아이 주식회사 배터리 팩
US10720683B2 (en) 2014-09-30 2020-07-21 Cps Technology Holdings Llc Battery module thermal management features for internal flow
US9825343B2 (en) 2014-09-30 2017-11-21 Johnson Controls Technology Company Battery module passive thermal management features and positioning
JP2016202701A (ja) 2015-04-24 2016-12-08 京楽産業．株式会社 遊技機

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JP2002184374A (ja) * 2000-12-12 2002-06-28 Honda Motor Co Ltd 電池パック
JP2011049012A (ja) * 2009-08-26 2011-03-10 Sanyo Electric Co Ltd バッテリパック
JP2014013725A (ja) * 2012-07-05 2014-01-23 Denso Corp 電池ユニット

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US11289761B2 (en) 2022-03-29
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DE112017005190B4 (de) 2022-09-08
JP6711234B2 (ja) 2020-06-17

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