WO2018155506A1 - Module de batterie - Google Patents

Module de batterie Download PDF

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Publication number
WO2018155506A1
WO2018155506A1 PCT/JP2018/006286 JP2018006286W WO2018155506A1 WO 2018155506 A1 WO2018155506 A1 WO 2018155506A1 JP 2018006286 W JP2018006286 W JP 2018006286W WO 2018155506 A1 WO2018155506 A1 WO 2018155506A1
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WO
WIPO (PCT)
Prior art keywords
battery
battery module
module according
pressure adjusting
battery cell
Prior art date
Application number
PCT/JP2018/006286
Other languages
English (en)
Japanese (ja)
Inventor
貴支 鈴木
Original Assignee
日立オートモティブシステムズ株式会社
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 日立オートモティブシステムズ株式会社 filed Critical 日立オートモティブシステムズ株式会社
Priority to JP2019501384A priority Critical patent/JPWO2018155506A1/ja
Publication of WO2018155506A1 publication Critical patent/WO2018155506A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—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
    • 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
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/627—Stationary installations, e.g. power plant buffering or backup power supplies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6563—Gases with forced flow, e.g. by blowers
    • 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
    • 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 in which a plurality of secondary battery cells are stacked.
  • Lithium-ion batteries can charge and discharge more energy than lead batteries and nickel-cadmium batteries, so there are various types such as portable electronic devices such as mobile phones and laptop computers, auxiliary power supplies for disasters, and power supplies for mobile vehicles such as automobiles and motorcycles. It can be applied to various uses.
  • a battery module for automobiles a plurality of lithium ion battery cells (hereinafter referred to as battery cells) are connected in series, in parallel, or a combination thereof to form an assembled battery (battery module), which is a vehicle. In many cases.
  • the electrode expansion of the battery cell due to charging / discharging is compressed and suppressed, the output is prevented from being lowered, and the battery module is compressed and stored in a predetermined size for mounting in the vehicle. .
  • Patent Document 1 in a spacer component arranged between battery cells, an elastic material is formed in a portion that contacts the battery cell to absorb the influence of the battery cell electrode expansion and compressive force. Is disclosed within a certain range.
  • the battery module of Patent Document 2 has a compressive force within a certain range by bending a connecting member that fixes the interval between the end plates according to the dimensions of the laminated body including the battery cells and the spacer parts. Yes.
  • the present invention has been made in view of the above points, and its object is to absorb the accumulation of dimensional errors of battery cells while keeping the compression force of the battery module within a certain range with a simple configuration. It is to provide a battery module that fits in a predetermined dimension.
  • a battery module of the present invention includes a plurality of battery cells that are stacked and compressed in one direction, and are sandwiched between the plurality of battery cells so as to face the side surfaces of the battery cells, and are discretely arranged. And a spacer formed by integrally molding a plurality of pressure adjusting portions that are structurally deformed and press-contacted to the side surface of the battery cell.
  • the present invention it is possible to absorb the accumulation of the dimensional error of the battery cell and keep it within a predetermined size while keeping the compressive force of the battery module within a certain range with a simple configuration. Battery output performance can be maintained.
  • a battery module of the present invention will be described with reference to the drawings.
  • the present invention is not limited to this, and electric power generated by solar power generation or wind power generation is used.
  • the present invention can be applied to all battery modules for home use, office use, industrial use, and the like.
  • FIG. 1 is an external perspective view of a battery cell 1 constituting the battery module of the present embodiment.
  • the battery cell 1 is a prismatic lithium ion secondary battery, and an electrode group having a positive electrode and a negative electrode is accommodated in a container made of an aluminum alloy together with a non-aqueous electrolyte.
  • the battery cell 1 includes a flat box type battery can 11 and a battery lid 12 that seals an opening of the battery can 11.
  • the battery can 11 is a flat rectangular container formed by deep drawing.
  • the battery can 11 has a rectangular bottom surface PB, a pair of wide side surfaces PW rising from the long side of the bottom surface PB, and a pair of narrow side surfaces PN rising from the short side of the bottom surface PB.
  • the battery lid 12 is formed of a rectangular flat plate member and has an upper surface PU.
  • a positive electrode external terminal 13 and a negative electrode external terminal 14 are arranged in the long side direction of the battery lid 12.
  • the positive electrode external terminals 13 and the negative electrode external terminals 14 of the plurality of battery cells 1 are connected by a bus bar (not shown) to serve as input / output terminals of the battery module.
  • a gas discharge valve 15 that is cleaved by an increase in internal pressure and discharges the gas in the battery can 11 is provided.
  • the battery lid 12 is laser-welded to the battery can 11 to seal the opening of the battery can 11.
  • FIG. 2 is an external perspective view of the spacer 2.
  • the spacer 2 is interposed between the plurality of battery cells 1 to hold the battery cells 1 and to electrically insulate the battery cells 1 from each other.
  • the compression force also referred to as lashing force
  • the mounting interval of the battery cell 1 are adjusted.
  • the spacer 2 is, for example, a part integrally formed of PBT (Poly Butylene Terephtalate) or PC (polycarbonate) resin.
  • the spacer 2 has a bottom wall portion 23 that faces the bottom surface PB of the battery can 11, an upper wall portion 25 that faces the top surface PU of the battery can 11, and a side wall portion 22 that faces the narrow side surface PN of the battery can 11.
  • the battery can 11 is inserted into a space surrounded by the bottom wall 23, the upper wall 25, and the side wall 22. Thereby, the movement of the wide side surface PW of the battery can 11 is restrained and held.
  • the spacer 2 is disposed over the entire wide side surface PW of the battery can 11 so as to connect the opposing side wall portions 22, and the spacer 2 is sandwiched between the wide side surfaces PW of the two battery cans 11 and a plurality of the narrow wall portions 21.
  • a press adjusting unit 24 The plurality of pressure adjusting units 24 are discretely arranged in the height direction of the battery cans 11 and are in pressure contact with the wide side surfaces PW of the two battery cans 11.
  • FIG. 3 is an exploded perspective view showing a state in which a part of the battery module 3 of the embodiment is disassembled.
  • the battery module 3 is formed by alternately connecting a plurality of battery cells 1 (1a, 1b%) And spacers 2 (2a, 2b, 2c). End spacers 7 and end plates 4 are arranged at both ends of the stacked battery cells (1a, 1b%) And spacers (2a, 2b, 2c).
  • the end spacer 7 has a bottom wall portion, an upper wall portion, and a side wall portion similar to those of the spacer 2, and one surface surrounded by the bottom wall portion, the upper wall portion, and the side portion of the side wall portion is sealed.
  • a mounting hole 41 for attaching the battery module 3 to the vehicle is provided on the upper surface of the end plate 4.
  • a fixing screw hole 42 for fixing the side plate 5 with the bolt 6 is provided on the side surface of the end plate 4.
  • Opposing end spacers 7 are arranged between the opposing end plates 4, and a plurality of battery cells 1 (1 a, 1 b%) And spacers 2 (2 a, 2 b, 2 c...) Are interposed between the end spacers 7. They are alternately stacked. For vehicle mounting, compressive force is applied from the end plates 4 at both ends in the stacking direction so that the distance between the mounting holes 41 of the opposing end plates 4 becomes a predetermined size, and the end plates 4 and the side plates 5 are connected by bolts 6. And the battery module 3 is assembled.
  • the battery module 3 of the embodiment performs the absorption of the dimensional variation of the battery cell 1 and the adjustment of the compressive force (also referred to as lashing force) by the spacer 2.
  • This compressive force is a holding force of the battery cell 1 of the battery module 3 and is a binding force that suppresses electrode expansion of the battery cell 1. Therefore, a predetermined range of compressive force is maintained in order to maintain the proof strength against the running vibration of the vehicle and the battery characteristics.
  • FIG. 4 is a cross-sectional view of the battery module 3 in the stacking direction.
  • the spacer 2 is disposed between the wide side surfaces PW of the two battery cells 1.
  • the spacer 2a between the battery cell 1a and the battery cell 1b will be described here, the same applies to the other spacers 2.
  • the four pressure adjusting portions 24 of the spacer 2a are in pressure contact with the wide side surfaces PW of the battery cell 1a and the battery cell 1b, and the compressive force is adjusted by the structural deformation force. Details of the structure of the pressing adjustment unit 24 will be described later.
  • the narrow wall portion 21 of the spacer 2a is a strength maintaining member that prevents insulation between the battery cell 1a and the battery cell 1b and prevents structural deformation of the bottom wall portion 23, the upper wall portion 25, and the side wall portion 22 of the spacer 2a. Do not press the wide side surface PW of the cell 1a and the battery cell 1b.
  • FIG. 5 shows the compressive force (vertical axis) of the battery module 3 when the spacer member is provided with an elastic member between the battery cells 1 as in Patent Document 1 and when the pressing adjustment unit 24 of this embodiment is provided. ) And the compression length (horizontal axis).
  • the change in compression force (straight line) with respect to the change in compression length is smaller than that in the case of an elastic member.
  • stacking compression of the battery module 3 becomes large, the displacement width
  • FIG. 6A is an enlarged view of a broken line region in FIG. 4, and is a diagram showing a crescent-shaped cross section of one pressing adjustment unit 24. As shown in FIG. 4, the spacer 2 is provided with four pressing adjustment portions 24. These are the press adjustment parts 24 which have the cross section shown to FIG. 6A, and are arrange
  • the pressure adjusting unit 24 having a crescent-shaped cross section in FIG. 6A is sandwiched between the wide side surfaces PW of the two battery cells 1.
  • One wide side surface PW is press-contacted at the center of the press adjusting portion 24, and the other wide side surface PW is press-contacted at the end of the press adjusting portion 24.
  • the pressure adjusting unit 24 is deformed from a crescent shape into a linear shape by the compressive force received at the pressure contact.
  • the battery cell 1 receives a reaction force when it is deformed from a crescent shape into a linear shape from the pressure adjusting portion 24 that is in pressure contact with the wide side surfaces PW on both sides, and this becomes the compressive force of the battery cell 1.
  • This reaction force is a force due to the structural deformation that the pressing adjusting unit 24 restores from a linear shape to a crescent shape, and as described above, there is little variation due to dimensional variations of the battery cells 1.
  • the pressure adjustment is performed so that the points of the pressure adjusting unit 24 that are in pressure contact with the wide side surface PW of the battery cell 1 are shifted from each other on the wide side surface PW of the battery cell 1 that sandwiches the spacer 2.
  • a section of the portion 24 is formed.
  • the pressure adjusting unit 24 forms a cross section in which a space in which the pressure adjusting unit 24 can be displaced by a compressive force is provided on the other battery cell 1 side facing the wide side surface PW of the one battery cell 1 in pressure contact. .
  • the press adjustment part 24 is shaped so as to be connected to the opposing side wall portion 22 at a position corresponding to any one of the three points of the center portion or the end portion of the crescent-shaped cross section of the press adjusting portion 24.
  • the press adjusting part 24 is connected to the side wall part 22 at the crescent-shaped central part, the pressure contact at the end of the cross section of the press adjusting part 24 moves along the wide side surface PW when receiving a compressive force.
  • the pressure adjusting part 24 is connected to the side wall part 22 at one end of the crescent shape, the pressure contact at the other end part and the central part moves along the wide side surface PW when receiving the compressive force.
  • the press adjustment part 24 may be shape
  • FIG. 6B is an enlarged view of the broken line area of FIG. 4, and shows a cross section of one pressing adjustment unit 24. 6B is sandwiched between the wide side surfaces PW of the two battery cells 1, and the S-shaped convex portion of the pressure adjustment unit 24 is in pressure contact with the wide side surface PW. The pressure adjusting unit 24 is deformed from an S-shape to a linear shape by the compressive force received by the pressure contact.
  • the battery cell 1 receives a reaction force when it is deformed from an S-shape to a linear shape from the pressure adjusting portion 24 that is in pressure contact with the wide side surfaces PW on both sides, and this becomes the compressive force of the battery cell 1.
  • This reaction force is a force due to the structural deformation that the pressing adjusting unit 24 restores from a straight shape to an S-shape, and as described above, there is little variation due to dimensional variations of the battery cells 1.
  • the press adjusting unit 24 is arranged such that the points that come into pressure contact with the wide side surface PW of the battery cell 1 of the press adjusting unit 24 are shifted from each other on the wide side surface PW of the battery cell 1 that sandwiches the spacer 2.
  • the cross section of the pressure adjusting portion 24 is formed.
  • the pressure adjusting unit 24 is a cross-section in which a space in which the pressure adjusting unit 24 can be displaced by a compressive force is provided on the other battery cell 1 side facing the wide side surface PW of the one battery cell 1 to which the pressure adjusting unit 24 is pressed. Is forming.
  • the pressure adjusting part 24 is formed so as to be connected to the opposing side wall part 22 at a position corresponding to any one of the three points of the center part or the end part of the S-shaped cross section.
  • the press adjusting part 24 is connected to the side wall part 22 at the S-shaped central part, the pressure contact at the end of the cross section of the press adjusting part 24 moves along the wide side surface PW when receiving a compressive force.
  • the pressing adjustment portion 24 is connected to the side wall portion 22 at one end portion of the S-shaped cross section, the other end portion and the central pressure contact point along the wide side surface PW when receiving a compressive force. Moving. Thereby, the deformation
  • the press adjustment part 24 may be shape
  • FIG. 6C is an enlarged view of the broken line region of FIG. 4 and is a view showing a cross section of one pressing adjustment unit 24. 6C is sandwiched between the wide side surfaces PW of the two battery cells 1, and the skirt of the mountain shape of the pressure adjusting unit 24 is sandwiched between the wide side surfaces PW of the two battery cells 1. The portion is in pressure contact with the wide side surface PW. In the pressing adjustment unit 24, the chevron shape is deformed into an acute angle by the compressive force received by the pressure contact.
  • the battery cell 1 receives a reaction force that the chevron shape returns from the acute angle to the original angle from the pressure adjusting portion 24 that is pressed against the wide side surfaces PW on both sides, and this becomes the compressive force of the battery cell 1.
  • This reaction force is a force due to the structural deformation that the pressing adjustment unit 24 restores to the mountain shape, and as described above, the variation due to the dimensional variation of the battery cell 1 is small.
  • the press adjusting unit 24 forms a cross section of the press adjusting unit 24 so that the pressure contacts of the press adjusting unit 24 face each other on the wide side surface PW of the battery cell 1 holding the spacer 2.
  • the skirt of the chevron-shaped cross section of the press adjusting unit 24 is formed so as to provide a space that can be displaced inside the press adjusting unit 24 by a compressive force.
  • the pressure adjusting part 24 is formed so as to be connected to the opposing side wall part 22 at a position corresponding to the apex of the mountain-shaped cross section.
  • the skirt of the chevron-shaped cross section of the pressing adjustment unit 24 is a free end, and therefore moves along the wide side surface PW when receiving a compressive force.
  • FIG. 6D is an enlarged view of the broken line region of FIG. 4 and is a diagram showing a cross section of one pressing adjustment unit 24.
  • the pressure adjusting unit 24 having a cross-section of a dogleg shape (also referred to as ⁇ mark shape,> mark shape, inequality symbol shape) is sandwiched between the wide side surfaces PW of the two battery cells 1, and The start point / end point and the bending point are pressed against the wide side surface PW.
  • the pressure adjusting unit 24 is deformed into a shape in which the shape of the dog-leg is crushed by the compressive force received by the pressure contact.
  • the battery cell 1 receives a reaction force that attempts to return to the shape of the dogleg from the pressure adjusting unit 24 that is in pressure contact with the wide side surfaces PW on both sides, and this becomes the compressive force of the battery cell 1.
  • This reaction force is a force due to the structural deformation that the pressing adjustment unit 24 restores to the shape of a dogleg, and as described above, there is little variation due to dimensional variations of the battery cells 1.
  • the cross section of the press adjusting unit 24 is formed so that the pressure contacts of the press adjusting unit 24 are arranged so as to be shifted from each other on the wide side surface PW of the battery cell 1 holding the spacer 2. Moreover, the press adjustment part 24 forms the cross section which provided the space which can displace the press-contact of the U-shaped press adjustment part 24 to a compression direction with a compressive force.
  • the press adjusting part 24 is formed so as to be connected to the opposing side wall part 22 at a position corresponding to any one of the start point, the bending point, and the end point of the cross section of the dogleg shape.
  • the pressure adjusting part 24 is connected to the side wall part 22 at the bending point of the dogleg shape, the pressure contact points at the starting point and the end point of the dogleg shape move along the wide side surface PW when receiving the compressive force.
  • the pressure adjusting unit 24 is connected to the side wall portion 22 at the starting point of the V shape, the bending point and the end pressure contact point of the V shape move along the wide side surface PW when receiving the compressive force. .
  • the press adjustment part 24 When the pressure adjusting portion 24 is connected to the side wall portion 22 at the end point of the dogleg shape, the bent point of the dogleg shape and the pressure contact point at the start point move along the wide side surface PW when receiving the compressive force. . Thereby, the deformation
  • the press adjustment part 24 may be shape
  • FIG. 6E is an enlarged view of the broken line region of FIG. 4 and shows a cross section of one pressing adjustment unit 24. 6E is pressed between the wide side surfaces PW of the two battery cells 1, and both ends of the pressure adjustment unit 24a are in pressure contact with the wide side surface PW. The pressure adjusting unit 24a is deformed like a bow by the compressive force received at the pressure contact.
  • the battery cell 1 receives a reaction force when it is deformed like a bow from the pressure adjusting portion 24a pressed against the wide side surfaces PW on both sides, and this becomes the compressive force of the battery cell 1.
  • This reaction force is a force due to the structural deformation of the pressure adjusting unit 24a, and as described above, there is little variation due to dimensional variations of the battery cells 1.
  • the press adjusting unit 24 a is arranged such that the points that come into pressure contact with the wide side surface PW of the battery cell 1 of the press adjusting unit 24 a are shifted from each other on the wide side surface PW of the battery cell 1 holding the spacer 2. In this way, a cross section of the pressing adjustment portion 24a is formed. Further, the end portion of the pressing adjustment portion 24a is formed so as to provide a space that can be displaced in the compression direction by a compression force.
  • the press adjusting part 24a is formed so as to be connected to the opposing side wall part 22 at a position corresponding to any one of the three points of the center part or the end part of the cross section.
  • the press adjusting part 24a is connected to the side wall part 22 at the center, the pressure contact at the end of the press adjusting part 24a moves along the wide side surface PW when receiving a compressive force.
  • the pressure adjusting portion 24a is connected to the side wall portion 22 at one end, the pressure contact at the other end moves along the wide side surface PW when receiving a compressive force.
  • the press adjustment part 24 may be shape
  • the wide side surface PW of the battery cell 1 is electrode-expanded like a drum. Therefore, the clearance between the stacked battery cells 1 is narrow at the center of the wide side surface PW and wider at the periphery than at the center.
  • the cross-sectional shape of the pressing adjustment unit 24 may be changed in the direction of the side wall 22.
  • the end portion has the cross-sectional shape of the press adjusting portion 24a
  • the central portion has the cross-sectional shape of the press adjusting portion 24b. That is, it is formed such that the width of the central portion of the press adjusting portion 24 is wider than the width of the end portion.
  • the central portion of the pressing adjustment portion 24 has a spring characteristic with a linear inclination smaller than that of the end portion.
  • the cross-sectional shape of the press adjusting part 24a and the end part may be the cross-sectional shape of the press adjusting part 24b.
  • the compressive force at the center is increased, and the drum-like electrode expansion of the battery cell 1 can be suppressed.
  • the configuration in which the cross section of the pressure adjusting unit 24 has a different shape in the surface direction of the wide side surface PW is not limited to the flap shape cross section of FIG. 6E but can be applied to other cross sectional shapes of FIGS. 6A to 6D.
  • FIG. FIG. 2 and FIG. 4 show that the four pressure adjusting portions 24 are evenly arranged, but the interval between the central pressure adjusting portions 24 is larger than the interval between the end pressure adjusting portions 24. To place. Thereby, the compressive force of the press adjusting part 24 at the center is reduced, and the surface pressure of the compressive force is made uniform.
  • FIG. 7 is an external perspective view of the spacer 2.
  • the spacer 2 of FIG. 7 is configured such that, in the spacer 2 of the first embodiment shown in FIG. 2, an opening 26 that communicates with the space sandwiched between the pressing adjustment portions 24 is provided on each of the opposing side wall portions 22. It has become.
  • a coolant such as cooling air flows from the opening 26 of the one side wall portion 22 and flows through the cooling flow path formed by the pressing adjustment portion 24 facing the wide side surface PW of the opposite battery cell 1 and the other side wall. It flows out from the opening part 26 of the part 22. FIG. By this refrigerant flow, the battery cell 1 can be cooled on the wide side surface PW.
  • FIG. 8 is an external perspective view of the battery module 3.
  • the side plate 5 has an opening 51 that communicates with the opening 26 described in FIG.
  • the cool air can be introduced from the opening 51 using the fan or the duct and can be discharged from the opening 51 provided in the opposite side plate 5.
  • the temperature management of the module 3 can be performed.
  • the spacer 2 between the battery cells 1 is provided with the pressure adjusting portion 24 that generates a repulsive force due to structural deformation.
  • the fluctuation range of the compressive force with respect to the dimensional variation of the battery cell 1 can be narrowed.
  • the pressure adjusting unit 24 is a homogeneous member that can be integrally formed with the spacer 2, the manufacturing cost of the spacer 2 can be reduced.
  • the pressing adjustment unit 24 is a structural deformation member, the degree of freedom in design can be increased in relation to the dimensional variation and the variation range of the compressive force.
  • the present invention is not limited to the above-described embodiments, and includes various modifications.
  • the above-described embodiments have been described in detail for easy understanding in the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment.

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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)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention concerne un module de batterie qui absorbe les erreurs dimensionnelles cumulatives d'une cellule de batterie et présente des dimensions qui s'inscrivent dans des dimensions prédéterminées, la force de compression du module de batterie s'inscrivant dans une certaine plage selon une configuration simple. Le module de batterie (3) de la présente invention comprend : une pluralité de cellules de batterie (1) stratifiées et compressées dans une direction ; et un élément d'espacement (2) faisant face aux surfaces latérales des éléments de batterie, pris en sandwich entre la pluralité de cellules de batterie, et comprenant une pluralité de parties de réglage de pression (24) qui sont disposées de manière individuelle et déformées structurellement pour être pressées contre les surfaces latérales des cellules de batterie, les parties de réglage de pression (24) étant formées d'un seul tenant.
PCT/JP2018/006286 2017-02-24 2018-02-21 Module de batterie WO2018155506A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019501384A JPWO2018155506A1 (ja) 2017-02-24 2018-02-21 電池モジュール

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017033529 2017-02-24
JP2017-033529 2017-02-24

Publications (1)

Publication Number Publication Date
WO2018155506A1 true WO2018155506A1 (fr) 2018-08-30

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PCT/JP2018/006286 WO2018155506A1 (fr) 2017-02-24 2018-02-21 Module de batterie

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JP (2) JPWO2018155506A1 (fr)
WO (1) WO2018155506A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN111435722A (zh) * 2019-01-14 2020-07-21 丰田自动车株式会社 电池包
CN111435722B (zh) * 2019-01-14 2022-06-28 丰田自动车株式会社 电池包
JP2020145160A (ja) * 2019-03-08 2020-09-10 トヨタ自動車株式会社 組電池
JP7137762B2 (ja) 2019-03-08 2022-09-15 トヨタ自動車株式会社 組電池
WO2020194930A1 (fr) * 2019-03-28 2020-10-01 三洋電機株式会社 Dispositif d'alimentation électrique, véhicule électrique le comportant, et dispositif de stockage d'énergie
WO2020194937A1 (fr) * 2019-03-28 2020-10-01 三洋電機株式会社 Dispositif d'alimentation électrique, et véhicule électrique et dispositif de stockage électrique chacun équipé de celui-ci

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