WO2013084756A1 - Dispositif d'alimentation électrique, véhicule équipé dudit dispositif d'alimentation électrique, et dispositif de stockage électrique - Google Patents

Dispositif d'alimentation électrique, véhicule équipé dudit dispositif d'alimentation électrique, et dispositif de stockage électrique Download PDF

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Publication number
WO2013084756A1
WO2013084756A1 PCT/JP2012/080658 JP2012080658W WO2013084756A1 WO 2013084756 A1 WO2013084756 A1 WO 2013084756A1 JP 2012080658 W JP2012080658 W JP 2012080658W WO 2013084756 A1 WO2013084756 A1 WO 2013084756A1
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WO
WIPO (PCT)
Prior art keywords
power supply
supply device
battery
cooling plate
separator
Prior art date
Application number
PCT/JP2012/080658
Other languages
English (en)
Japanese (ja)
Inventor
河野　剛
Original Assignee
三洋電機株式会社
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Filing date
Publication date
Application filed by 三洋電機株式会社 filed Critical 三洋電機株式会社
Publication of WO2013084756A1 publication Critical patent/WO2013084756A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • H01M10/61—Types of temperature control
    • H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
    • 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
    • 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
    • H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
    • 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
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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 power supply device in which a plurality of prismatic battery cells are stacked, a vehicle including the power supply device, and a power storage device, and more particularly, a motor that is mounted on an electric vehicle such as a hybrid vehicle, a fuel cell vehicle, an electric vehicle, and an electric motorcycle.
  • a power supply device that supplies power to a large-current power supply used in power storage devices for home use, factories, etc.
  • the power supply device can increase the output voltage by connecting a large number of rectangular battery cells in series, and can increase the charge / discharge current by connecting them in parallel. Therefore, a high-current, high-output power supply device used for the power supply of a motor that runs an automobile or the like has a plurality of battery cells connected in series to increase the output voltage.
  • a power supply device used for this type of application has a metal end plate fastened with a bind bar as a battery stack in which a plurality of rectangular battery cells are stacked.
  • the prismatic battery cell used as a power supply device needs to be cooled because it may generate heat due to charge and discharge and deteriorate. For this reason, conventionally, a cooling air passage is provided between adjacent prismatic battery cells of the battery stack, and air cooling is performed to cool the prismatic battery cells from the side by heat exchange with the cooling air. The method was adopted. Further, in recent years, a refrigerant cooling system that performs cooling more efficiently by placing a battery stack on the upper surface of a cooling plate in which a refrigerant is circulated and thermally connecting the bottom surface of the rectangular battery cell and the cooling plate. Has also been developed (see, for example, Patent Document 1). An example of a battery stack using such a refrigerant cooling system is shown in FIG. Note that the thermal coupling or the thermal coupling state referred to here indicates a state where the two members are in contact with each other so that heat transfer occurs.
  • each separator 920 includes a plurality of separators 920.
  • the separator 920 is interposed between the rectangular battery cells 910 to insulate them.
  • Each square battery cell 910 is sandwiched between separators 920 on both sides. Therefore, each separator 920 is formed in a size and shape that can cover the rectangular battery cell 910.
  • metal end plates are arranged on both end faces of the assembled battery 911.
  • the assembled battery 910 is fastened by fixing the end plates at both ends with a bind bar.
  • the separator 920 is in a state where the upper electrode portion and the bottom portion of the rectangular battery cell 910 are opened.
  • the assembled battery 911 has a heat conductive sheet 940 disposed at the bottom of the stacked rectangular battery cells 910 and a cooling plate 912 disposed at the bottom of the heat conductive sheet 940.
  • each square battery cell 910 can release heat to the cooling plate 912 side via the heat conductive sheet 940.
  • the plurality of prismatic battery cells 910 can stabilize the temperature.
  • the prismatic battery cells located on the end faces of the battery stack are particularly easily cooled compared to other prismatic battery cells located in the middle portion.
  • a temperature distribution occurs in the stacking direction of the rectangular battery cells. This is because, in the battery laminate 811 shown in the side view of FIG. 14, the rectangular battery cell 810A located on the end face is adjacent to the metal end plate 830 via the end separator 821, as shown in the sectional view of FIG.
  • the metal end plate 830 is thermally coupled to the cooling plate 812, which is considered to cause heat dissipation from the end face side of the prismatic battery cell 810A.
  • the heat conductive sheet 840 interposed between the bottom surface of the battery stack 811 and the cooling plate 812 is pressed in order to eliminate the gap between the bottom surface of the rectangular battery cell 810 and the cooling plate 812 to enhance thermal coupling.
  • the elastic member which is easy to deform is used. For this reason, when the pressing force to the cooling plate 812 of the battery laminated body 811 is small, as shown in the expanded sectional view of FIG. 16, the deformation amount of the heat conductive sheet 840 is also small. However, when the pressing force increases, the heat conductive sheet 840 is compressed and the amount of deformation increases as shown in the enlarged cross-sectional view of FIG. 17, and as a result, the heat conductive sheet 840 extends in the stacking direction of the rectangular battery cells 810.
  • the end plate 830 and the cooling plate 812 disposed on the end surface of the battery stack 811 are thermally connected to each other by the stretched heat conductive sheet 840, and this is combined with the fact that the end plate 830 is made of metal.
  • the heat of the prismatic battery cell 810 ⁇ / b> A is taken from the side surface from the end face with which the end plate 830 is in contact. There was a problem of going too far. As shown in the graph of the temperature distribution in the stacking direction shown superimposed on the battery stack of FIG.
  • the temperature of the prismatic battery cells 810 ⁇ / b> A on both end faces of the battery stack 811 drops more than the other prismatic battery cells 810, A temperature difference is generated depending on the position of the prismatic battery cell 810, and this non-uniform temperature affects the life and performance of the assembled battery.
  • a main object of the present invention is to provide a power supply device that maintains a substantially uniform temperature of stacked rectangular battery cells, a vehicle including the power supply device, and a power storage device.
  • a battery stack formed by stacking a plurality of rectangular battery cells and the battery stack are fastened in the stacking direction. Insulates the end plate made of metal disposed on both end faces, the separator having insulating properties disposed between the square battery cells, and the square battery cell located at both ends of the battery stack and the end plate. Insulating end separators arranged for cooling, cooling plates for cooling by being thermally coupled to one surface of the battery stack, and flexibility arranged between the battery stack and the cooling plates It is a power supply device provided with the heat conductive sheet which has, The spacer part which inhibits the thermal coupling with the said cooling plate and the said end plate through the said heat conductive sheet can be provided.
  • the power supply device can prevent the prismatic battery cells adjacent to the end plate from being cooled via the end plate by suppressing the thermal contact between the end plate and the heat conductive sheet. That is, heat dissipation from the end plate to the cooling plate can be prevented, and heat can be radiated only by the cooling plate via the heat conductive sheet on which the battery stack is placed, so that the battery stack can be at a substantially uniform temperature. it can.
  • the spacer portion is integrally formed at the bottom portion of the end separator, the spacer portion is provided toward the bottom portion of the end plate, and the cooling plate via the heat conductive sheet is provided.
  • the spacer portion can be disposed on the end plate, and the end plate can be placed on the spacer portion.
  • the end plate can suppress the thermal contact between the cooling plate and the end plate via the heat conductive sheet by the spacer portion formed integrally with the end separator. Heat can be reduced.
  • the said spacer part thicker than the thickness of the said end separator between the said square battery cell and the said end plate.
  • the heat transfer amount decreases in proportion to the distance by increasing the thickness of the spacer portion while suppressing the extension of the battery stack in the stacking direction, so that the heat of the adjacent rectangular battery cells passes through the end plate. And it can suppress transmitting to a cooling plate via a heat conductive sheet.
  • the power supply device which concerns on a 4th side surface
  • multiple protrusion pieces can be provided in the direction of the said cooling plate.
  • a space can be formed for each protruding piece, and since the thermal conductivity of air is small, the thermal conductivity can be reduced by the space formation, and the heat generation of the adjacent rectangular battery cells passes through the end plate to generate heat. Propagation to the cooling plate via the conductive sheet can be further suppressed.
  • the thermal conductivity of the said end separator can be made into resin lower than the said separator.
  • the heat conductivity to an end plate can be reduced by reducing the heat conductivity from the adjacent square battery cell.
  • the heat conduction to the cooling plate can be further reduced by having the spacer portion.
  • coolant can be circulated through the inside of the said cooling plate.
  • the power supply device which concerns on a 7th side surface, it can be set as the sheet
  • a heat conductive sheet can compress-deform by being pressed between a square battery cell and a cooling plate, can raise an adhesion degree, and can be in a heat-bonded state efficiently.
  • vehicle according to the eighth aspect can be provided with the power supply device described above.
  • the power storage device according to the ninth aspect can include the power supply device described above.
  • FIG. 1 is a perspective view showing a structure of an end separator according to Example 1.
  • FIG. 6 is a perspective view showing a structure of an end separator according to Embodiment 2.
  • FIG. 6 is a perspective view showing a structure of an end separator according to Embodiment 3.
  • FIG. FIG. 3 is a schematic enlarged cross-sectional view in the stacking direction on one side end plate side of the battery stack according to Example 1; It is a block diagram which shows an example of the vehicle carrying a power supply device. It is a block diagram which shows the other example of the vehicle carrying a power supply device. It is a block diagram which shows the example applied to the power supply device for electrical storage. It is a schematic side view to the lamination direction of the battery laminated body which removed the bind bar in an experiment example. It is a schematic sectional drawing to the lamination direction by the one side end plate side of the battery laminated body in an experiment example.
  • FIG. 4 is a schematic enlarged cross-sectional view in the stacking direction on one end plate side of the battery stack in Experimental Example 1.
  • FIG. 6 is a schematic enlarged cross-sectional view in the stacking direction on one end plate side of the battery stack in Experimental Example 2.
  • FIG. It is a schematic sectional drawing which shows the conventional assembled battery.
  • each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing.
  • the contents described in some examples and embodiments may be used in other examples and embodiments.
  • FIG. 1 is a schematic exploded perspective view of the power supply device according to the embodiment
  • FIG. 2 is a perspective view of one battery stack shown in FIG. 1
  • FIG. 3 is a cooling of the battery stack shown in FIG.
  • FIG. 4 is an exploded perspective view of the battery stack shown in FIG. 2 as viewed from below
  • FIG. 5 is an exploded perspective view of the battery stack shown in FIG. 2, and
  • FIG. The schematic sectional drawing which looked at the battery laminated body shown in FIG. (Power supply device 100)
  • the external appearance of the power supply device 100 is a box shape having a rectangular upper surface.
  • the battery stack 10 is formed by the outer upper case 1 having a U-shaped cross section and the outer bottom case 3 having a U-shaped cross section.
  • both end edges of the outer case 1 are covered with the end cover 2.
  • flanges 4A and 4B projecting vertically are provided on both side surfaces in the longitudinal direction of the outer case 1 and the outer case 3 so as to be easily fixed when mounted on the vehicle.
  • the flange 4A and the flange 4B are provided with screw holes to facilitate screwing using the screw holes. (Battery laminate 10)
  • the battery stack 10 has a substantially rectangular parallelepiped shape.
  • the top cover 7 is disposed at the top and the cooling plate 21 is disposed at the bottom.
  • the battery laminated body 10 arrange
  • the bind bar 6 is a member for fixing the battery stack 10 by fixing the end plates 5 on both end faces.
  • the bind bar 6 has a substantially rectangular shape with an area substantially the same as the side surface of the battery stack 10.
  • the bind bar 6 has a bent portion 6A in which both end surfaces of the battery stack 10 are bent substantially vertically.
  • the bent portion 6A shown in FIG. 5 is fixed by screwing a set screw 19 into the female screw holes 5A of the end plates 5 at both ends. Thereby, the battery laminated body 10 has fastened the end plate 5 with the bind bar 6.
  • the bind bar 6 is fixed using a connector 8 for locking the top cover 7 at the top of the battery stack 10 and further fixing the cooling plate 21 at the bottom of the battery stack 10.
  • the specific bind bar 6 has a locking portion 6B whose upper end portion is bent substantially vertically, and is locked to the side end portion of the top cover 7.
  • the bind bar 6 has connecting pieces 6C that protrude at three locations on the lower end. As shown in FIG. 4, the connecting piece 6 ⁇ / b> C is connected to a bent portion 8 ⁇ / b> C in which the connecting tool 8 is bent substantially vertically. In the connection method, the engagement hook 6D protruding from the connection piece 6C is connected to the connection hole 8D opened in the bent portion 8C.
  • the battery stack 10 locks the top cover 7 by the locking portion 6B of the bind bar 6 and fixes the cooling plate 21 by the connecting piece 6C of the bind bar 6 and the bent portion 8C of the connecting tool 8. Therefore, it is fastened while achieving integration in the vertical direction. (Cooling plate 21)
  • the battery stack 10 has a plurality of prismatic battery cells 11 stacked as shown in FIG. Since the square battery cell 11 generates heat by charging and discharging, it needs to be cooled. Therefore, a cooling plate 21 is disposed at the bottom of the heated battery stack 10. The cooling plate 21 is arranged to cool the heat generated by the rectangular battery cells 11 of the battery stack 10. As shown in FIG. 3, the cooling plate 21 includes a refrigerant path 23. The refrigerant path 23 is provided at two places as an entrance and exit, and is connected to a pipe meandering inside the cooling plate 21. In the cooling plate 21, the refrigerant is circulated from the cooling mechanism 20 to the refrigerant path 23 of the cooling plate 21.
  • the refrigerant path 23 is supplied with a refrigerant such as carbon dioxide in a liquid state, vaporizes the refrigerant inside, and cools the cooling plate 21 with heat of vaporization. As a result, the plurality of rectangular battery cells 11 in the battery stack 10 are cooled by the cooling plate 21.
  • a refrigerant such as carbon dioxide in a liquid state
  • the cooling mechanism 20 includes a compressor 26 that pressurizes the gaseous refrigerant vaporized in the refrigerant path 23, a cooling heat exchanger 27 that cools and liquefies the refrigerant compressed by the compressor 26, and the cooling heat exchanger 27. And an expansion valve 28 for supplying the refrigerant liquefied to the refrigerant path 23.
  • the liquid refrigerant supplied through the expansion valve 28 is vaporized in the refrigerant path 23 in the cooling plate 21, cools the cooling plate 21 with heat of vaporization, and is discharged to the cooling mechanism 20. Therefore, the refrigerant circulates through the refrigerant path 23 of the cooling plate 21 and the cooling mechanism 20 to cool the cooling plate 21.
  • the cooling mechanism 20 cools the cooling plate 21 to a low temperature with the heat of vaporization of the refrigerant, but the cooling plate can also be cooled regardless of the heat of vaporization.
  • the cooling plate supplies a refrigerant such as brine cooled to a low temperature to the refrigerant path, and cools the cooling plate by releasing heat to the refrigerant.
  • the cooling mechanism 20 controls the cooling capacity of the cooling plate 21 with a temperature sensor (not shown) that detects the temperature of the rectangular battery cells 11 in the battery stack 10. That is, when the temperature of the prismatic battery cell becomes higher than the preset cooling start temperature, the coolant is supplied to the cooling plate 21 for cooling, and when the prismatic battery cell becomes lower than the cooling stop temperature, The supply of the refrigerant is stopped, and the rectangular battery cell is controlled to a preset temperature range. (Thermal conductive sheet 22)
  • the cooling plate 21 and the prismatic battery cell 11 are not in direct contact with each other, but as shown in a perspective view seen from below shown in FIG. 4, the heat conductive sheet 22 is interposed between the cooling plate 21 and the prismatic battery cell 11. It has.
  • the bottom surface of the prismatic battery cell 11 is in an exposed state.
  • the battery stack 10 is mounted in a state in which a deformable heat conductive sheet 22 is attached to the bottom of the exposed rectangular battery cell 11 and pressed by the cooling plate 21 from below to compress the heat conductive sheet 22. .
  • the heat conductive sheet 22 is deformed to eliminate a gap between the prismatic battery cell 11 and the cooling plate 21, eliminate the heat insulation effect by the air layer, and efficiently transfer the heat of the prismatic battery cell 11 to the cooling plate 21. It can dissipate heat.
  • the heat conductive sheet 22 is made of a material that is insulative and excellent in heat conduction, and more preferably has a certain degree of elasticity. Examples of such a material include acrylic, urethane, epoxy, and silicone resins. By doing in this way, the cooling performance by the cooling plate 21 can be improved, electrically insulating between the battery laminated body 10 and the cooling plate 21.
  • FIG. In particular, when the outer can of the rectangular battery cell 11 is made of metal and the cooling plate 21 is made of metal, it is necessary to insulate the battery so as not to be electrically connected to the bottom surface of the rectangular battery cell 11. Moreover, in order to maintain insulation reliably, an additional insulating film can also be interposed. For example, a rectangular battery cell can improve insulation by covering an outer can with an insulating shrink tube (heat shrink film) or the like. (Square battery cell 11)
  • the stacked rectangular battery cell 11 shown in FIG. 5 has a thin and substantially box shape made of a rectangular battery, and a pair of positive and negative electrode terminals 14 protrude upward at both ends of the upper surface, and between the electrode terminals 14. Is provided with a safety valve 15.
  • the safety valve 15 is configured to open when the internal pressure of the rectangular battery cell 11 rises to a predetermined value or more, and to release the internal gas. By opening the safety valve 15, the increase in the internal pressure of the rectangular battery cell 11 can be stopped.
  • the unit cell constituting the rectangular battery cell is a rechargeable secondary battery such as a lithium ion secondary battery, a nickel-hydrogen battery, or a nickel-cadmium battery.
  • a lithium ion secondary battery is used for a thin battery, there is an advantage that the charging capacity with respect to the capacity of the entire battery stack can be increased.
  • the rectangular battery cell 11 is made of a metal outer can.
  • an insulating separator 12 is interposed to prevent the outer cans of the adjacent rectangular battery cells 11 from coming into contact with each other and shorting out.
  • both surfaces of the rectangular battery cell 11 are sandwiched between two separators 12.
  • This separator 12 is provided with a peripheral wall in which the rectangular battery cells 11 can be arranged on both side surfaces.
  • the peripheral wall covers both end surfaces and both side surfaces of the rectangular battery cell 11 with two separators 12, and includes a pair of electrode terminals 14 and a safety valve 15 disposed on the upper surface of the rectangular battery cell. It is formed so as to cover the removed part.
  • the bottom surface of the separator 12 is provided with an opening through which the bottom of the rectangular battery cell 11 can be exposed and the heat conductive sheet 22 can be disposed. Further, the separator 12 is provided with a protruding piece 12 a for insulating between the rectangular battery cell 11 and the cooling plate 21.
  • the outer can of the square battery cell can be made of an insulating material such as plastic. In this case, the prismatic battery cell does not need to be laminated by insulating the outer can, and therefore the separator can be made of metal.
  • a separator can also connect a square battery cell by the fitting structure on both surfaces. By interposing the separator connected to the prismatic battery cell with the fitting structure, it is possible to prevent the displacement of the adjacent prismatic battery cells. (End separator 13)
  • the battery stack 10 has a plurality of prismatic battery cells 11 and separators 12 stacked.
  • an insulating end separator 13 is disposed.
  • the end separator 13 is interposed between the end face prismatic battery cell 11 ⁇ / b> A and the end plate 5.
  • the end separator 13 is formed of an insulating resin in order to insulate the end plate 5 formed of a metal and the rectangular battery cell 11A in order to increase the strength.
  • the material has a relatively low conductivity.
  • the battery stack 10 includes a plurality of prismatic battery cells 11, a plurality of separators 12, prismatic battery cells 11 ⁇ / b> A disposed at both ends thereof, and end separators 13 to form a battery block 9.
  • the end separator 13 is formed in the same structure as the separator 12 in the shape of the prismatic battery cell 11 ⁇ / b> A disposed on the end face of the battery block 9. Further, the end separator 13 is provided with a protruding piece 13a for insulating between the rectangular battery cell 11A on the end face and the cooling plate 21.
  • the shape of the end separator 13 on the end plate 5 side is provided with a spacer portion 13A having an area substantially equal to the bottom surface of the end plate 5, and further provided with guide portions 13b for holding both upper end surfaces of the end plate 5. ing.
  • the heat conductive sheet 840 is stretched, the bottom of the end separator 830 comes into contact with the cooling plate 812, and heat may be transmitted.
  • a spacer portion 13 ⁇ / b> A that is bent substantially perpendicularly to the end plate 5 side at the bottom of the end separator 13 is provided.
  • This end plate 5 suppresses heat transfer from the end plate 5 to the cooling plate 21 by interposing a resin spacer portion 13 ⁇ / b> A having a thermal conductivity smaller than that of the heat conductive sheet 22 between the end plate 5 and the cooling plate 21. can do.
  • the rectangular battery cell 11 ⁇ / b> A at the end of the adjacent battery stack 10 can prevent an extreme temperature drop via the end plate 5.
  • the battery stack 10 is sandwiched between end plates 5 at both ends of the battery block 9. Furthermore, the square battery cell 11 has a bottom exposed from the opened portion of each separator 12. The exposed bottom portion of the rectangular battery cell 11 is thermally coupled to the cooling plate 21 via the heat conductive sheet 22.
  • the heat conductive sheet 22 is slightly stretched in the stacking direction of the prismatic battery cells 11 by the pressing of the prismatic battery cells 11 and the cooling plate 21. For this reason, in order to prevent the end plate 5 and the heat conductive sheet 22 from being thermally coupled by such an extended portion, a spacer 13A is provided on the end plate 5 side at the bottom of the end separator 13. According to this configuration, the end plate 5 can be prevented from being cooled by the cooling plate 21.
  • the end separator 13 in this embodiment by providing the spacer 13 ⁇ / b> A instead of the above-described aspect, it is possible to prevent an extreme temperature drop of the rectangular battery cells 11 ⁇ / b> A at both ends of the battery block 9.
  • the power supply device having the above-described configuration can achieve uniform temperature distribution of the battery stack without increasing the dimension of the power supply device in the stacking direction. For this reason, the temperature of all the rectangular battery cells in the battery stack 10 can be controlled to the same level by the cooling plate 21 via the heat conductive sheet 22.
  • the structure of the end separator 13 as Example 1 is shown in the perspective view of FIG.
  • the end separator 13 is provided with a spacer portion 13 ⁇ / b> A protruding toward the bottom surface of the end plate 5 by integral molding.
  • the end separator 13 includes a guide portion 13b that holds both ends of the upper portion of the end plate 5, and the end plate 5 is held by the guide portion 13b and the spacer portion 13A.
  • the spacer portion 13 ⁇ / b> A has substantially the same area as the bottom surface of the end plate 5, and has a thickness substantially equal to the thickness of the end separator 13 between the rectangular battery cell 11 ⁇ / b> A on the end surface and the end plate 5.
  • a positioning hole 13c that can screw the end plate 5 and the cooling plate 21 is formed in the spacer portion 13A.
  • the material of the end separator 13 provided with the spacer portion 13A is preferably made of a resin having high insulation properties and high heat insulation properties in order to avoid conduction between the end face prismatic battery cells 11A and the cooling plate 21. . Since the end plate 5 can be suppressed from being cooled by the cooling plate 21 by providing the spacer portion 13 ⁇ / b> A, the prismatic battery cell 11 ⁇ / b> A at the end of the battery stack 10 is cooled via the end plate 5. Can be prevented.
  • the distance between the end plate 5 and the cooling plate 21 changes according to the thickness of the spacer portion 13A.
  • the spacer portion 13A is formed of a resin having a relatively low thermal conductivity.
  • heat transfer from the spacer portion 13A to the cooling plate 21 is not completely eliminated.
  • the thickness of the spacer portion 13A is substantially equal to the thickness of the end separator 13, but the present invention is not limited to such a configuration.
  • the heat transfer between the end plate 5 and the cooling plate 21 can be further inhibited by forming the spacer portion thicker than the end separator.
  • the end separator 13 is integrally formed with a spacer portion 13B having a partition wall thicker than the above-described spacer portion 13A.
  • the thickness of the spacer portion 13B can be two to three times that of the spacer portion 13A.
  • the end plate 5 is brought into contact with almost the entire surface of the spacer portion, but the present invention is not limited to this configuration.
  • heat transfer through the spacer portion can be suppressed by bringing a part of the spacer portion into contact with the heat conductive sheet 22 or the cooling plate 21.
  • FIG. 1 The end separator 13 has a spacer portion 13C in which a plurality of protruding legs 13d are formed below the spacer portion 13A.
  • the protruding leg 13d of the spacer portion 13C can reduce the contact area with the heat conductive sheet 22 or the cooling plate 21.
  • a space is formed between the protruding legs 13d of the spacer portion 13C.
  • a material having a lower thermal conductivity than the separator 12 disposed between the rectangular battery cells 11 can be used as the material of the end separator 13 of Examples 1 to 3.
  • a material having a lower thermal conductivity than the separator 12 disposed between the rectangular battery cells 11 can be used.
  • a material such as polypropylene, which has a low thermal conductivity and a high insulating property can be used. According to this configuration, the amount of heat transferred from the rectangular battery cell 11 adjacent to the end plate 5 to the end plate 5 can be reduced by the end separator 13.
  • the power supply device described above can be used as an in-vehicle battery system.
  • a vehicle equipped with a power supply device an electric vehicle such as a hybrid car or a plug-in hybrid car that runs with both an engine and a motor, or an electric vehicle that runs only with a motor can be used, and is used as a power source for these vehicles . (Power supply for hybrid vehicles)
  • FIG. 11 shows an example in which a power supply device is mounted on a hybrid car that travels with both an engine and a motor.
  • a vehicle HV equipped with the power supply device shown in this figure includes an engine 96 and a running motor 93 that run the vehicle HV, a battery system 100B that supplies power to the motor 93, and a generator that charges the battery of the battery system 100B. 94.
  • the battery system 100B is connected to a motor 93 and a generator 94 via a DC / AC inverter 95.
  • the vehicle HV travels by both the motor 93 and the engine 96 while charging / discharging the battery of the battery system 100B.
  • the motor 93 is driven to drive the vehicle when the engine efficiency is low, for example, during acceleration or low-speed driving.
  • the motor 93 is driven by power supplied from the battery system 100B.
  • the generator 94 is driven by the engine 96 or is driven by regenerative braking when braking the vehicle, and charges the battery of the battery system 100B
  • FIG. 12 shows an example in which a power supply device is mounted on an electric vehicle that runs only with a motor.
  • a vehicle EV equipped with the power supply device shown in this figure includes a traveling motor 93 for traveling the vehicle EV, a battery system 100C for supplying electric power to the motor 93, and a generator 94 for charging a battery of the battery system 100C.
  • the motor 93 is driven by power supplied from the battery system 100C.
  • the generator 94 is driven by energy when regeneratively braking the vehicle EV, and charges the battery of the battery system 100C. (Power storage device for power storage)
  • this power supply device can be used not only as a power source for a moving body but also as a stationary power storage device.
  • a power source for home and factory use a power supply system that is charged with sunlight or midnight power and discharged when necessary, or a streetlight power supply that charges sunlight during the day and discharges at night, or during a power outage It can also be used as a backup power source for driving signals.
  • FIG. The power supply device 100A shown in this figure forms a battery unit 82 by connecting a plurality of battery stacks 81 in a unit shape.
  • Each battery stack 81 has a plurality of prismatic battery cells connected in series and / or in parallel.
  • Each battery stack 81 is controlled by a power controller 84.
  • the power supply device 100A drives the load LD after charging the battery unit 82 with the charging power supply CP. For this reason, the power supply device 100A includes a charge mode and a discharge mode.
  • the load LD and the charging power source CP are connected to the power supply device 100A via the discharging switch DS and the charging switch CS, respectively.
  • ON / OFF of the discharge switch DS and the charge switch CS is switched by the power supply controller 84 of the power supply apparatus 100A.
  • the power controller 84 switches the charging switch CS to ON and the discharging switch DS to OFF to permit charging from the charging power supply CP to the power supply device 100A.
  • the power controller 84 turns off the charging switch CS and turns on the discharging switch DS to discharge.
  • the mode is switched to permit discharge from the power supply device 100A to the load LD. If necessary, the charge switch CS can be turned on and the discharge switch DS can be turned on to simultaneously supply power to the load LD and charge the power supply device 100A.
  • the load LD driven by the power supply device 100A is connected to the power supply device 100A via the discharge switch DS.
  • the power supply controller 84 switches the discharge switch DS to ON, connects to the load LD, and drives the load LD with the power from the power supply device 100A.
  • the discharge switch DS a switching element such as an FET can be used. ON / OFF of the discharge switch DS is controlled by the power supply controller 84 of the power supply apparatus 100A.
  • the power controller 84 also includes a communication interface for communicating with external devices. In the example of FIG. 13, the host device HT is connected according to an existing communication protocol such as UART or RS-232C. Further, if necessary, a user interface for the user to operate the power supply system can be provided.
  • Each battery stack 81 includes a signal terminal and a power supply terminal.
  • the signal terminals include a pack input / output terminal DI, a pack abnormality output terminal DA, and a pack connection terminal DO.
  • the pack input / output terminal DI is a terminal for inputting / outputting signals from other pack batteries and the power supply controller 84
  • the pack connection terminal DO is for inputting / outputting signals to / from other pack batteries which are child packs.
  • the pack abnormality output terminal DA is a terminal for outputting the abnormality of the battery pack to the outside.
  • the power supply terminal is a terminal for connecting the battery stacks 81 in series and in parallel.
  • the power supply device 100A includes an equalization mode for equalizing the battery units 82.
  • the battery units 82 are connected to the output line OL via the parallel connection switch 85 and connected in parallel to each other.
  • an equalizing circuit 86 controlled by the power supply controller 84 is provided.
  • the equalization circuit 86 suppresses variations in the remaining battery capacity among the plurality of battery units 82.
  • the power supply device the vehicle including the power supply device, and the power storage device are suitably used as a power supply device for a plug-in hybrid electric vehicle, a hybrid electric vehicle, an electric vehicle, or the like that can switch between the EV traveling mode and the HEV traveling mode. it can.
  • a backup power supply device that can be mounted on a rack of a computer server, a backup power supply device for a wireless base station such as a mobile phone, a power storage device for home use and a factory, a power supply for a street light, etc. Also, it can be used as appropriate for applications such as a backup power source such as a traffic light.
  • Cooling plate 920 ... Separator 940 ... Thermal conductive sheet HV, EV ... Vehicle LD ... Load CP ... Power supply for charging; DS ... Discharge switch; CS ... Charge switch OL ... Output line; HT ... Host device DI ... Pack input / output terminal; DA ... Pack abnormal output terminal; DO ... Pack connection terminal

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

Abstract

La présente invention a pour objectif d'arriver à maintenir une température sensiblement uniforme pour des cellules rectangulaires empilées qui constituent un corps de cellules empilées. Pour ce faire, un dispositif d'alimentation électrique comprend un corps de cellules empilées (10) comprenant : une pluralité de cellules rectangulaires (11) empilées ; des plaques d'extrémité métalliques (5), agencées au niveau des deux faces d'extrémité du corps de cellules empilées (10) afin de maintenir ledit corps de cellules empilées (10) dans la direction d'empilage ; des séparateurs isolants (12), agencés entre chacune des cellules rectangulaires (11) ; des séparateurs d'extrémité isolants (13), agencés pour isoler les cellules rectangulaires (11), positionnés au niveau des deux extrémités du corps de cellules empilées (10) à partir desdites plaques d'extrémité (5) ; une plaque de refroidissement (21), couplée thermiquement à une surface dudit corps de cellules empilées (10) afin d'abaisser la température du corps de cellules empilées ; et une feuille thermiquement conductrice souple (22), agencée entre ledit corps de cellules empilées (10) et ladite plaque de refroidissement (21). Le dispositif d'alimentation électrique peut comprendre des séparateurs (13A, 13B, 13C) qui empêchent tout couplage thermique entre ladite plaque de refroidissement (21) et ladite plaque d'extrémité (5) via ladite feuille thermiquement conductrice (22).
PCT/JP2012/080658 2011-12-10 2012-11-27 Dispositif d'alimentation électrique, véhicule équipé dudit dispositif d'alimentation électrique, et dispositif de stockage électrique WO2013084756A1 (fr)

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CN104752666A (zh) * 2013-12-31 2015-07-01 比亚迪股份有限公司 动力电池模组
CN104752639A (zh) * 2013-12-31 2015-07-01 比亚迪股份有限公司 动力电池模组
WO2016031628A1 (fr) * 2014-08-27 2016-03-03 株式会社 豊田自動織機 Bloc batterie
CN106410083A (zh) * 2016-11-01 2017-02-15 法乐第(北京)网络科技有限公司 电池组件及电动汽车
JP2018529186A (ja) * 2015-09-25 2018-10-04 エルジー・ケム・リミテッド バッテリーモジュール、該バッテリーモジュールを含むバッテリーパック及び該バッテリーパックを含む自動車
WO2020013120A1 (fr) * 2018-07-09 2020-01-16 三洋電機株式会社 Système de batteries, véhicule électrique équipé du système de batteries, et dispositif accumulateur d'électricité
CN111477779A (zh) * 2019-01-23 2020-07-31 丰田自动车株式会社 电池装置
CN111937178A (zh) * 2018-03-30 2020-11-13 三洋电机株式会社 电源装置以及具有该电源装置的车辆
CN114207912A (zh) * 2019-08-07 2022-03-18 三洋电机株式会社 电源装置和使用该电源装置的电动车辆以及蓄电装置
CN114342167A (zh) * 2019-10-08 2022-04-12 株式会社Lg新能源 电池组及包括该电池组的车辆
US11509005B2 (en) 2018-03-09 2022-11-22 Kabushiki Kaisha Toshiba Battery pack including separator between secondary batteries
DE102022124278A1 (de) 2022-09-21 2024-03-21 Man Truck & Bus Se Energiespeichervorrichtung mit aktiver Temperierung und Verfahren zur aktiven Temperierung der Energiespeichervorrichtung

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JP2011034775A (ja) * 2009-07-31 2011-02-17 Sanyo Electric Co Ltd 組電池の冷却構造、及び、バッテリーシステム
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Cited By (27)

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Publication number Priority date Publication date Assignee Title
JP2015106443A (ja) * 2013-11-28 2015-06-08 株式会社豊田自動織機 電池モジュール
CN104752666A (zh) * 2013-12-31 2015-07-01 比亚迪股份有限公司 动力电池模组
CN104752639A (zh) * 2013-12-31 2015-07-01 比亚迪股份有限公司 动力电池模组
WO2015101269A1 (fr) * 2013-12-31 2015-07-09 Byd Company Limited Module batterie d'alimentation
US10243182B2 (en) 2013-12-31 2019-03-26 Byd Company Limited Power battery module with detachable separators
WO2016031628A1 (fr) * 2014-08-27 2016-03-03 株式会社 豊田自動織機 Bloc batterie
JP2016048621A (ja) * 2014-08-27 2016-04-07 株式会社豊田自動織機 電池パック
JP2018529186A (ja) * 2015-09-25 2018-10-04 エルジー・ケム・リミテッド バッテリーモジュール、該バッテリーモジュールを含むバッテリーパック及び該バッテリーパックを含む自動車
CN106410083A (zh) * 2016-11-01 2017-02-15 法乐第(北京)网络科技有限公司 电池组件及电动汽车
US11509005B2 (en) 2018-03-09 2022-11-22 Kabushiki Kaisha Toshiba Battery pack including separator between secondary batteries
CN111937178A (zh) * 2018-03-30 2020-11-13 三洋电机株式会社 电源装置以及具有该电源装置的车辆
CN111937178B (zh) * 2018-03-30 2023-10-17 三洋电机株式会社 电源装置以及具有该电源装置的车辆
JP7348180B2 (ja) 2018-07-09 2023-09-20 三洋電機株式会社 バッテリシステムとバッテリシステムを備える電動車両及び蓄電装置
CN112385071A (zh) * 2018-07-09 2021-02-19 三洋电机株式会社 电池系统和具有电池系统的电动车辆以及蓄电装置
JPWO2020013120A1 (ja) * 2018-07-09 2021-08-05 三洋電機株式会社 バッテリシステムとバッテリシステムを備える電動車両及び蓄電装置
CN112385071B (zh) * 2018-07-09 2024-09-20 三洋电机株式会社 电池系统和具有电池系统的电动车辆以及蓄电装置
US12095063B2 (en) 2018-07-09 2024-09-17 Sanyo Electric Co., Ltd. Battery system, electric vehicle equipped with battery system, and electricity storage device
WO2020013120A1 (fr) * 2018-07-09 2020-01-16 三洋電機株式会社 Système de batteries, véhicule électrique équipé du système de batteries, et dispositif accumulateur d'électricité
CN111477779A (zh) * 2019-01-23 2020-07-31 丰田自动车株式会社 电池装置
CN111477779B (zh) * 2019-01-23 2022-12-27 丰田自动车株式会社 电池装置
CN114207912A (zh) * 2019-08-07 2022-03-18 三洋电机株式会社 电源装置和使用该电源装置的电动车辆以及蓄电装置
EP4012820A4 (fr) * 2019-08-07 2022-10-19 SANYO Electric Co., Ltd. Dispositif d'alimentation, véhicule électrique l'utilisant et dispositif de stockage d'énergie
JP2022545267A (ja) * 2019-10-08 2022-10-26 エルジー エナジー ソリューション リミテッド バッテリーパック及びそれを含む自動車
CN114342167B (zh) * 2019-10-08 2024-03-08 株式会社Lg新能源 电池组及包括该电池组的车辆
JP7472270B2 (ja) 2019-10-08 2024-04-22 エルジー エナジー ソリューション リミテッド バッテリーパック及びそれを含む自動車
CN114342167A (zh) * 2019-10-08 2022-04-12 株式会社Lg新能源 电池组及包括该电池组的车辆
DE102022124278A1 (de) 2022-09-21 2024-03-21 Man Truck & Bus Se Energiespeichervorrichtung mit aktiver Temperierung und Verfahren zur aktiven Temperierung der Energiespeichervorrichtung

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