WO2013146561A1 - Dispositif d'alimentation électrique, ainsi que véhicule et dispositif de stockage d'énergie pourvus de ce dernier - Google Patents

Dispositif d'alimentation électrique, ainsi que véhicule et dispositif de stockage d'énergie pourvus de ce dernier Download PDF

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Publication number
WO2013146561A1
WO2013146561A1 PCT/JP2013/058214 JP2013058214W WO2013146561A1 WO 2013146561 A1 WO2013146561 A1 WO 2013146561A1 JP 2013058214 W JP2013058214 W JP 2013058214W WO 2013146561 A1 WO2013146561 A1 WO 2013146561A1
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WO
WIPO (PCT)
Prior art keywords
plate
power supply
secondary battery
supply device
cooling
Prior art date
Application number
PCT/JP2013/058214
Other languages
English (en)
Japanese (ja)
Inventor
河野　剛
誠人 西川
Original Assignee
三洋電機株式会社
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 三洋電機株式会社 filed Critical 三洋電機株式会社
Publication of WO2013146561A1 publication Critical patent/WO2013146561A1/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
    • H01M10/62—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
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
    • 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
    • H01M10/6555—Rods or plates 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
    • 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
    • H01M50/249—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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
    • 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 invention relates to a power supply device in which a plurality of battery cells are stacked, and in particular, a power supply device for a motor mounted on an electric vehicle such as a hybrid vehicle, a fuel cell vehicle, an electric vehicle, an electric motorcycle, etc.
  • the present invention relates to a power supply device for large current used for power storage applications for vehicles, a vehicle including the power supply device, and a power storage device.
  • a large number of secondary battery cells are stacked.
  • the secondary battery cell generates heat by charging / discharging.
  • a large number of secondary battery cells tend to be used to improve output, and the amount of heat generated is also increased. Since the secondary battery cell deteriorates due to heat generation and affects the life, it is important to cool it efficiently.
  • FIG. 26 (a) shows a schematic side view of an in-vehicle power supply device.
  • prismatic secondary battery cells 201 are stacked, end plates 203 are disposed on both end faces, and the end plates 203 are sandwiched with a bind bar (not shown) or the like to form a battery block. 211 is configured.
  • the end plate 203 is generally made of metal because mechanical strength is required to fasten the plurality of secondary battery cells 201.
  • a cooling plate 231 is disposed on the bottom surface of the battery block 211 in order to cool the secondary battery cells 203.
  • the cooling plate 231 is made of metal, and heat is exchanged by circulating a refrigerant or the like inside. According to this method, each secondary battery cell 201 can be efficiently cooled by directly exchanging heat between the cooling plate 231 and the secondary battery cell 201.
  • the temperature distribution of many secondary battery cells is non-uniform
  • Patent Document 1 As a power supply device that cools a secondary battery cell using a cooling plate, for example, a configuration as in Patent Document 1 is known.
  • the power supply device of Patent Literature 1 is provided with a pipe through which a refrigerant circulates in a cooling plate, and is cooled through a cooling plate that is in thermal contact with the secondary battery cell. According to this configuration, since the cooling plate can be cooled uniformly, the temperature distribution of the secondary battery cells can be made uniform.
  • the end plate 203 used for the edge of the battery block 211 is made of metal, so that the secondary battery cells located at both ends are heated to the end plate 203. Is transmitted.
  • the power supply device having the configuration of Patent Document 1 can make the temperature of the cooling plate relatively uniform.
  • the power supply device shown in FIG. since the secondary battery cells positioned at both ends of the battery block 211 are also cooled from the end plate 203 in addition to the cooling plate 231, the temperature distribution of the secondary battery cells 201 constituting the battery block 211 is not good. It becomes uniform. Specifically, as shown in the solid line graph of FIG.
  • the secondary battery cells positioned at both ends of the secondary battery cells in the stacked state As a result of the end plate being cooled by the cooling plate, the secondary battery cells positioned at both ends of the secondary battery cells in the stacked state.
  • the amount of cooling is relatively high.
  • the secondary battery cell located in the center part generates heat relatively because the secondary battery cells adjacent to both sides also generate heat, and the temperature distribution is shown by a curve A in FIG. 5 shows a temperature distribution in which the temperature of the secondary battery cells at both end portions is lower than that in the central portion.
  • the curve A indicates the temperature distribution of the plurality of secondary battery cells stacked
  • the curve B indicates the temperature distribution of the cooling plate. Due to such non-uniform temperature of the secondary battery cell, there has been a problem that the performance of the secondary battery cell varies. In particular, when the end plate 203 is fixed to the cooling plate 231, the heat transfer property of the end plate 203 is excellent, and this temperature non-uniformity problem becomes significant.
  • a main object of the present invention is to provide a power supply device capable of uniformly adjusting the temperature by suppressing temperature variations of a plurality of secondary battery cells.
  • a battery stack 9 formed by stacking a plurality of secondary battery cells 1 and the battery stack 9 in the stacking direction.
  • Metal end plates 3, 43, 63 disposed at both ends of the battery laminate 9 for fastening, an insulating separator 2 disposed between the secondary battery cells 1, and the battery End separators 4, 64 disposed between the secondary battery cells 1 located at both ends of the laminate 9 and the end plates 3, 43, 63, and one surface of the battery laminate 9 are arranged to face each other.
  • cooling plates 31, 91 connected to the secondary battery cells 1 constituting the battery stack 9 in a heat transfer state and cooling the secondary battery cells 1, and the end plates 3, 43, 63 and the end separators 4 and 64 Characterized by comprising providing a gap 6 in the mating surface.
  • the contact area between the end plate and the end separator can be reduced, and the secondary battery cell positioned on both end faces of the battery stack.
  • the end plate excellent in heat transfer property can prevent a situation where it is cooled more than other secondary battery cells.
  • the cooling method using the cooling plate the secondary battery cells positioned at both ends of the battery stack are cooled by the end plates while effectively cooling the plurality of secondary battery cells constituting the battery stack. Therefore, the plurality of secondary battery cells can be uniformly cooled, thereby reducing the variation in temperature distribution of the plurality of secondary battery cells.
  • the end plates 3, 43, 63 have the concave surfaces 13, 53, 73 formed by recessing the joint surfaces with the end separators 4, 64 in a concave shape.
  • the ribs 14, 54, 74 may be provided in the recesses 13, 53, 73, and the end separators 4, 64 may be brought into contact with the edges of the ribs 14, 54, 74.
  • the end plate is provided with a recess, and the rib is provided in the recess to improve the mechanical strength, while the end edge of the rib is in contact with the end separator, thereby reducing the contact area. Can also be used together. Further, by providing the end plate with a recess, the amount of metal used for manufacturing the end plate can be reduced, and the manufacturing can be performed at a light weight and at a low cost.
  • the end plates 3 and 43 are provided with ribs 14 and 54 that intersect the recesses 13 and 53, and the ribs 14 and 54 are the recesses.
  • 13 and 53 can be divided into a plurality of partitioning recesses 13A, 13B, 53A and 53B. According to the said structure, the mechanical strength of an end plate can be improved more by providing the rib which cross
  • the end separators 4, 64 are provided with the heat insulating piece 15 interposed between the end plates 3, 43, 63 and the cooling plates 31, 91. Can be provided. According to the above configuration, by interposing a heat insulating piece between the end plate and the cooling plate, it is possible to suppress the end plate from being cooled by the cooling plate, and thus the secondary battery cells positioned at both ends of the battery stack. It is possible to reduce the situation where the temperature becomes too lower than other secondary battery cells.
  • the heat insulating piece 15 can include the gap 16 on the joint surface with the cooling plates 31 and 91.
  • the end plates 3, 43, 63 are fixed to the cooling plates 31, 91 with bolts 7 penetrating the end plates 3, 43, 63 and the end plates.
  • the heat insulating piece 15 of the separators 4 and 64 can include a sleeve 17 for inserting the bolt 7.
  • the end plate 63 is fixed to the cooling plates 31 and 91 with bolts 7 penetrating the end plate 63, and the end plate 63 is A heat insulating wall that is divided into a first divided plate 63A and a second divided plate 63B in the penetrating direction of the bolt 7, and the end separator 64 is interposed between the first divided plate 63A and the second divided plate 63B. 75, and the bolt 7 passes through the first divided plate 63A, the heat insulating wall 75, and the second divided plate 63B, and fixes the end plate 3 to the cooling plates 31, 91. Can do.
  • the battery stack 59 formed by stacking a plurality of secondary battery cells 51 and the battery for fastening the battery stack 59 in the stacking direction.
  • a metal end plate 83 disposed at both ends of the laminate 59 and a state of heat transfer to the secondary battery cells 51 that are disposed so as to face one surface of the battery laminate 59 and constitute the battery laminate 59.
  • cooling plates 31 and 91 for cooling the secondary battery cells 51, and the end plates 83 are connected to the secondary battery cells 51 disposed at both ends of the battery stack 59.
  • the joint surface is recessed to provide a recess 13, the gap 6 is provided to the joint surface, and a rib 14 is provided to the recess 13 to contact the secondary battery cell 51 with the edge of the rib 14. Specially configured to To.
  • the contact area of an end plate and a secondary battery cell can be reduced by providing a space
  • the secondary battery cell can be prevented from being cooled more than the other secondary battery cells by the end plate excellent in heat transfer.
  • the cooling method using the cooling plate the secondary battery cells positioned at both ends of the battery stack are cooled by the end plates while effectively cooling the plurality of secondary battery cells constituting the battery stack. Therefore, the plurality of secondary battery cells can be uniformly cooled, thereby reducing the variation in temperature distribution of the plurality of secondary battery cells.
  • the end plate by providing a recess in the end plate and improving the mechanical strength by providing a rib in the recess, it is also possible to reduce the contact area by adopting a configuration in which the rib edge contacts the secondary battery cell. Can be used together. Further, by providing the end plate with a recess, the amount of metal used for manufacturing the end plate can be reduced, and the manufacturing can be performed at a light weight and at a low cost. In addition, because the end plates are placed on both end faces of the battery stack, in which a plurality of secondary battery cells are stacked, the separator and end separator can be omitted, making the outer shape smaller and reducing the size while manufacturing it at low cost. There are features that can be done.
  • the end plate 83 can be provided with the gap 16 on the joint surface with the cooling plates 31 and 91.
  • an air layer is provided on the joint surface between the end plate and the cooling plate, and heat transfer between the end plate and the cooling plate is suppressed, whereby the cooling of the secondary battery cells located at both ends can be suppressed.
  • the cooling mechanism 30 for cooling the cooling plate 31 is provided, and the cooling mechanism 30 circulates a coolant through the cooling plate 31 to thereby cool the cooling plate 31. Can be cooled.
  • the cooling plate can be efficiently cooled by the cooling mechanism, and the temperature rise of the secondary battery cell can be effectively prevented.
  • the said cooling plate 31 can be heated and the said secondary battery cell 1 which comprises the said battery laminated body 9 can be heated.
  • the cooling plate 91 is a casing 90 that houses the battery stack or a housing 92 to which the power supply device 100 is fixed.
  • the secondary battery cell 1 can be cooled by transferring heat to 91.
  • the heat of the secondary battery cell can be dissipated and cooled while being manufactured at low cost without providing a function such as a cooling mechanism for cooling the cooling plate.
  • the vehicle according to the thirteenth aspect of the present invention can include any one of the power supply devices described above.
  • the power storage device according to the fourteenth aspect of the present invention can include any one of the power supply devices described above.
  • FIG. 3 is a cross-sectional view of the battery block of FIG. 2 taken along line VI-VI.
  • FIG. 7 is a cross-sectional view of the battery block of FIG. 6 taken along the line VII-VII.
  • FIG. 7 is a cross-sectional view of the battery block of FIG. 6 taken along line VIII-VIII.
  • FIG. 7 is a cross-sectional view of the battery block 11 in FIG. 6 taken along the line IX-IX. It is a perspective view of an end plate and an end separator. It is a disassembled perspective view of the end plate and end separator of FIG. It is the disassembled perspective view which looked at the end plate and end separator of FIG. 11 from the back side. It is a perspective view which shows another example of an end plate.
  • FIG. 14 is a cross-sectional view of the end plate shown in FIG. 13 taken along line XIV-XIV.
  • FIG. 18 is a vertical longitudinal sectional view of a battery block of a power supply device according to Embodiment 2 of the present invention, corresponding to a cross section taken along line XV-XV in FIG. 17.
  • FIG. 18 is a vertical longitudinal sectional view of a battery block of a power supply device according to Embodiment 2 of the present invention, corresponding to a cross section taken along line XV-XV in FIG. 17.
  • FIG. 18 is a vertical longitudinal sectional view of the battery block shown in FIG. 15, corresponding to a cross section taken along line XVI-XVI of FIG.
  • FIG. 16 is a perspective view of an end plate and an end separator of the battery block shown in FIG. 15. It is a disassembled perspective view of the end plate and end separator of FIG. It is the disassembled perspective view which looked at the end plate and end separator of FIG. 18 from the back side. It is a disassembled perspective view of the battery block of the power supply device which concerns on Example 3 of this invention. It is a vertical longitudinal cross-sectional view of the battery block shown in FIG. It is a schematic plan view which shows the arrangement
  • the embodiment described below exemplifies a power supply device for embodying the technical idea of the present invention, a vehicle including the power supply device, and a power storage device
  • the present invention includes a power supply device, a vehicle including the power supply device
  • the power storage device is not specified as follows.
  • the dimensions, materials, shapes, relative arrangements, and the like of the constituent members described in the embodiments are not intended to limit the scope of the present invention only to the extent that there is no specific description. It is just an example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation.
  • 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 an exploded perspective view of the power supply device 100
  • FIG. 2 is a perspective view showing the battery block 11 of FIG. 1
  • FIG. 3 is an exploded perspective view of the battery block 11 of FIG. 4 is an exploded perspective view of the battery block 11 of FIG. 2
  • FIG. 5 is a perspective view of the secondary battery cell 1 and the separator 2
  • FIG. 6 is a sectional view taken along line VI-VI of the battery block 11 of FIG.
  • FIG. 8 is a sectional view taken along line VIII-VIII of the battery block 11 of FIG. 6, FIG.
  • This power supply device 100 is mounted mainly on an electric vehicle such as a hybrid vehicle or an electric vehicle, and is used as a power source for supplying electric power to a traveling motor of the vehicle to cause the vehicle to travel.
  • the power supply device of the present invention can be used for an electric vehicle other than a hybrid vehicle or an electric vehicle, and can also be used as a power source for a power storage device such as an electric vehicle requiring high output. (Power supply device 100)
  • the external appearance of the power supply device 100 is a box shape whose upper surface is rectangular.
  • a box-shaped outer case 20 is divided into two, and the battery block assembly 10 is accommodated therein.
  • the outer case 20 includes a lower case 21, an upper case 22, and end faces 23 connected to both ends of the lower case 21 and the upper case 22.
  • the upper case 22 and the lower case 21 have a flange portion 24 protruding outward, and the flange portion 24 is fixed with a bolt (not shown) and a nut (not shown).
  • the outer case 20 has the flange 24 disposed on the side surface of the outer case 20. In the example shown in FIG.
  • the battery block assembly 10 includes four battery blocks 11 formed by stacking a plurality of secondary battery cells 1. That is, two battery blocks 11 are connected in the stacking direction of the secondary battery cells 1 to form one battery block continuous body 11A, and two battery block continuous bodies 11A in such a connected state are arranged in parallel, A battery block assembly 10 is configured. In the battery block assembly 10 shown in FIGS. 1 to 4, these battery blocks 11 are arranged on the upper surface of the cooling plate 31. The cooling plate 31 is disposed in a thermally coupled state to the secondary battery cells 1 constituting the battery block 11. The battery block assembly 10 can be effectively cooled by thermally coupling the battery block 11 to the cooling plate 31. In the example of FIG. 1, two battery blocks 11 are placed on each cooling plate 31.
  • battery block 11 As described above, two battery blocks 11 are connected in the length direction, that is, the stacking direction of the secondary battery cells 1 to form one battery block continuous body 11A, and the two battery blocks in such a connected state 11 is supported by one cooling plate 31.
  • the battery block 11 shown in the figure is fixed to the cooling plate 31 via bolts 7.
  • the cooling plate 31 and its connection structure will be described later in detail.
  • each battery block 11 includes a battery laminate 9 formed by laminating a plurality of secondary battery cells 1, and metal ends disposed on both end faces of the battery laminate 9.
  • a plate 3 a separator 2 disposed between the secondary battery cells 1, an end separator 4 disposed between the secondary battery cell 1 and the end plate 3 positioned at both ends of the battery stack 9, It has.
  • the battery block 11 shown in the figure includes a metal connection fixture 5 that fastens the end plates 3 disposed on both end faces of the battery stack 9. (Secondary battery cell 1)
  • the secondary battery cell 1 has an outer can constituting the outer shape of a rectangular shape whose thickness is smaller than the width.
  • the square secondary battery cells 1 are stacked in the thickness direction to form a battery stack 9.
  • the secondary battery cell 1 is a lithium ion battery.
  • the secondary battery cell 1 can also be a rechargeable secondary battery such as a nickel metal hydride battery or a nickel cadmium battery.
  • the power supply device using a lithium ion secondary battery for the secondary battery cell 1 has a feature that the charge capacity with respect to the volume and mass of the entire battery cell can be increased.
  • the secondary battery cell 1 is provided with positive and negative electrode terminals 1b on a sealing plate 1a for closing the outer can, and a safety valve 1c between the electrode terminals 1b.
  • the safety valve 1c is configured to open when the internal pressure of the outer can rises to a predetermined value or more and to release the internal gas. The increase in the internal pressure of the outer can can be stopped by opening the safety valve 1c.
  • the secondary battery cell 1 has an outer can made of metal.
  • an insulating separator 2 is interposed between the secondary battery cells 1.
  • the secondary battery cell 1 insulated and stacked by the separator 2 can have an outer can made of metal such as aluminum.
  • the outer can of the secondary battery cell can be made of an insulating material such as plastic.
  • the separator does not necessarily have insulating properties.
  • the outer can may be covered with an insulating film, or the outer can may be coated with an insulating coating. (Separator 2)
  • the separator 2 is a spacer for insulating and laminating adjacent secondary battery cells 1.
  • the separator 2 is made of an insulating material such as plastic.
  • the separator 2 is interposed between the adjacent secondary battery cells 1 to insulate the adjacent secondary battery cells 1.
  • the separator 2 forms storage portions 2 ⁇ / b> A for storing the secondary battery cells 1 on both sides.
  • the storage portion 2 ⁇ / b> A has a shape in which the secondary battery cell 1 can be fitted in a fixed position, and prevents the adjacent secondary battery cell 1 from being displaced.
  • the separator 2 in the figure includes a flat plate 2a having a size substantially equal to the main surface 1A of the secondary battery cell 1, a side wall 2b covering the side surface 1B of the secondary battery cell 1, and a top surface 1C of the secondary battery cell 1.
  • a top plate 2c that covers a part and a protruding piece 2d that covers both ends of the bottom surface 1D of the secondary battery cell 1 are provided.
  • the separator 2 sandwiches the secondary battery cell 1 between the two separators 2 and covers the side surface 1B of the secondary battery cell 1.
  • the side wall 2b is approximately the same size as the side surface 1B of the secondary battery cell 1, and the flat plate 2a is fixed substantially at the center of the side wall 2b, so that each storage portion 2A uses a half of the side wall 2b.
  • About 1/2 of the side surface 1B of the secondary battery cell 1 is covered.
  • the upper surface of the storage portion 2A covers the sealing plate 1a of the secondary battery cell 1 partially with the top plate 2c, and exposes the electrode terminal 1b and the safety valve 1c so that the adjacent secondary battery cells 1 are adjacent to each other. Covers the top of the interface.
  • an opening 2B that exposes the bottom surface 1D of the secondary battery cell 1 is provided on the bottom surface side of the storage portion 2A.
  • protruding pieces 2d that cover both ends of the bottom surface 1D of the secondary battery cell 1 connected to the lower end of the side wall 2b, and between the pair of end walls 2d.
  • the bottom surface 1D of the secondary battery cell 1 is exposed with the portion as an opening 2B.
  • the protruding piece 2d provided at the lower end of the separator 2 holds the corner portion of the lower end of the secondary battery cell 1 fitted in the storage portion 2A in a fixed position, and between the secondary battery cell 1 and the cooling plate 31.
  • the secondary battery cell 1 is insulated from the cooling plate 31.
  • the above separator 2 is a molded body formed by molding plastic into a plate shape.
  • the separator does not necessarily need to be a plastic molded body, and may be an insulating sheet that insulates adjacent secondary battery cells.
  • this insulating sheet for example, a plastic sheet can be used. Since the separator made of a plastic insulating sheet can be reduced in thickness, it has a feature that the entire length of the battery stack can be shortened to make the whole compact.
  • the battery stack 9 has a plurality of secondary battery cells 1 and separators 2 stacked alternately.
  • the battery stack 9 is laminated with the separator 2 having insulation between the secondary battery cells 1 adjacent to each other, and the adjacent secondary battery cells 1 are insulated from each other by the separator 2. .
  • the end plate 3 is disposed outside the secondary battery cell 1 disposed at both ends of the battery stack 9 via the end separator 4.
  • the secondary battery cell 1 whose outer can is made of metal and the metal end plate 3 can be insulated and laminated by the end separator 4 having insulating properties. According to this structure, the some secondary battery cell 1 laminated
  • the plurality of secondary battery cells 1 that are stacked to constitute the battery stack 9 are connected in series and / or in parallel with each other by connecting positive and negative electrode terminals 1b.
  • the battery stack 9 connects the positive and negative electrode terminals 1 b of the adjacent secondary battery cells 1 in series and / or in parallel with each other through the bus bar 12.
  • the battery stack can increase the output voltage by connecting adjacent secondary battery cells in series with each other, and can increase the charge / discharge current by connecting adjacent secondary battery cells in parallel.
  • the battery block 11 shown in FIGS. 3 and 4 connects twelve secondary battery cells 1 in two rows and six rows.
  • the battery block 11 that connects the adjacent secondary battery cells 1 in parallel and connects the parallel connected secondary battery cells 1 in series increases the output voltage and increases the output while increasing the output current. it can.
  • the present invention does not specify the number of secondary battery cells constituting the battery stack and the connection state thereof. In the battery block, the number of secondary battery cells connected in parallel and in series can be variously changed, or all the secondary battery cells can be connected in series or in parallel. (End separator 4)
  • the end separator 4 is laminated between the secondary battery cell 1 and the end plate 3 disposed at both ends of the battery stack 9, and the secondary battery cell. 1 and the end plate 3 are insulated. That is, an insulating end separator 4 is interposed between the secondary battery cell 1 and the end plate 3 in order to insulate the metal end plate 3 and the secondary battery cell 1 at both ends of the battery stack 9. I am letting.
  • the end separator 4 is made of an insulating material such as plastic, like the separator 2.
  • the end separator 4 includes a flat plate 4a having a size substantially equal to the main surface 1A of the secondary battery cell 1, and the secondary battery cell 1 is provided on one side of the flat plate 4a.
  • a storage portion 4A for storage is formed, and the end plate 3 is joined to the opposite side.
  • the storage portion 4A of the end separator 4 has a shape that allows the secondary battery cell 1 to be fitted in a fixed position in the same manner as the storage portion 2A of the separator 2 described above, and prevents displacement of the adjacent secondary battery cells 1 from each other. Yes.
  • the end separator 4 shown in the figure is on one side of the flat plate 4a, on the side where the storage portion 4A of the secondary battery cell 1 is formed, on the side wall 4b that covers the side surface 1B of the secondary battery cell 1, and the secondary battery cell 1
  • a top plate 4c that covers a part of the top surface 1C, and a projecting piece 4d that covers both ends of the bottom surface 1D of the secondary battery cell 1.
  • the width of the side wall 4 b, the top plate 4 c, and the protruding piece 4 d is about 1 ⁇ 2 of the width of the secondary battery cell 1.
  • the secondary battery cell 1 positioned at one end of the battery stack 9 is sandwiched between the end separator 4 and the separator 2 adjacent to the end separator 4, and the secondary battery cell 1 is formed between the side wall 4 b of the end separator 4 and the side wall 2 a of the separator 2.
  • the side surface 1B is covered.
  • the top surface 1C is exposed so as to expose the electrode terminal 1b and the safety valve 1c while partially covering with the top plate 4c of the end separator 4 and the top plate 2c of the separator 2. Is covered.
  • an opening 4 ⁇ / b> B that exposes the bottom surface 1 ⁇ / b> D of the secondary battery cell 1 is provided.
  • the end separator 4 in FIG. 12 is provided with protruding pieces 4d that cover both ends of the bottom surface 1D of the secondary battery cell 1 connected to the lower ends of the side walls 4b, and a portion between the pair of end walls 4d.
  • the bottom surface 1D of the secondary battery cell 1 is exposed as the opening 4B.
  • the protruding piece 4d also holds the lower corner portion of the secondary battery cell 1 fitted in the storage portion 4A in a fixed position, and is interposed between the secondary battery cell 1 and the cooling plate 31, The secondary battery cell 1 is insulated from the cooling plate 31.
  • the end separator 4 of FIG. 11 is a surface that is opposite to the flat plate 4a, and is fitted to fit the fitting convex portion 3c provided on the joining surface of the end plate 3 on the surface facing the end plate 3.
  • a recess 4C is provided.
  • the end plate 3 shown in FIG. 12 is formed into a fitting convex portion 3c by forming almost the entire surface excluding the outer peripheral edge portion of the surface facing the end separator 4 one step higher.
  • the end separator 4 includes a peripheral wall 4e shaped along the outer peripheral edge of the fitting convex portion 3c, and the fitting convex portion 3c of the end plate 3 is positioned with the inner side of the peripheral wall 4e as a fitting concave portion 4C. While being able to guide. Thereby, the end separator 4 can join the end plate 3 to the fixed position of an outer surface. (End plate 3)
  • the end plate 3 is disposed at both ends of the battery block 11 and outside the end separator 4.
  • the end plate 3 is formed as a quadrangle having substantially the same shape and dimensions as the outer shape of the secondary battery cell 1 and sandwiches the stacked battery stack 9 from both end surfaces.
  • the end plate 3 of FIG. 12 is integrally formed with a fitting convex portion 3 c that is fitted into the fitting concave portion 4 C of the end separator 4 so that the end plate 3 can be disposed at a fixed position of the end separator 4.
  • the end plate 3 shown in the figure has a fitting convex portion 3c formed by raising the substantially entire surface excluding the outer peripheral edge portion one step higher on the surface facing the end separator 4.
  • the end plate 3 is connected to a fixed position of the end separator 4 in a state where the fitting convex portion 3c is fitted into the fitting concave portion 4C.
  • the end plate 3 is made entirely of metal.
  • the metal end plate 3 can realize excellent strength and durability.
  • the end plate 3 shown in the drawing is entirely made of aluminum or an aluminum alloy.
  • the metal end plate 3 can be formed into a predetermined shape by die casting.
  • the structure in which the end plate 3 is made of an aluminum die cast can realize excellent workability and corrosion resistance while making the whole lightweight.
  • the end plate can be made of a metal other than aluminum or aluminum alloy.
  • the metal end plate 3 is provided with a recess 13 by recessing the joint surface with the end separator 4 in a concave shape. As shown in FIGS. 6 and 7, the end plate 3 is provided with a gap 6 at the boundary with the end separator 4 by the opening of the recess 13 provided on the joining surface. Furthermore, the end plate 3 is provided with ribs 14 inside the recesses 13 as shown in FIGS. The rib 14 is integrally formed in a shape protruding from the bottom surface of the recess 13, and the tip edge is in contact with the end separator 4.
  • the end plate 3 shown in the figure is a flat plate of the end separator 4 with the outer peripheral portion of the fitting convex portion 3 c provided on the surface facing the end separator 4 and the tip surface of the rib 14 provided in the concave portion 13 being the same plane. 4a is contacted.
  • the end plate 3 is connected to the end separator 4 in a state in which the front end surface of the rib 14 is in contact with the flat plate 4 a that is the opposite surface of the end separator 4.
  • the above end plate 3 is provided with a gap 6 in the joint surface with the end separator 4 and the end surface of the rib 14 is brought into contact with the end separator 4, thereby reducing the contact area between the end plate 3 and the end separator 4. Thereby, the heat transfer between the end plate 3 and the end separator 4 is suppressed. Further, by providing the ribs 14 in the recesses 13, the mechanical strength of the entire end plate 3 is improved. Such an end plate 3 can reduce the contact area with the end separator 4 by effectively increasing the area of the opening of the recess 13, and can effectively suppress heat transfer.
  • the end plate can increase the area of the opening of the recess that forms the air gap by reducing the area of the end surface of the rib without increasing the area of the entire recess.
  • the end plate can be chamfered at the tip of the rib provided in the recess, or can be tapered so that the thickness decreases toward the tip, thereby reducing the area of the tip of the rib.
  • the end plate can be reduced in manufacturing cost while reducing the amount of metal to be used and reducing the amount of metal by increasing the opening area of the recess and increasing the depth.
  • the mechanical strength of the end plate may be reduced by increasing the opening area of the recess and increasing the depth, but as described above, the entire end plate can be provided by providing ribs in the recess. The mechanical strength of can be improved.
  • the opening ratio of the gap 6 provided on the joining surface between the end plate 3 and the end separator 4, that is, the ratio of the area of the opening of the recess 13 to the entire joining surface between the end plate 3 and the end separator 4 is 10 to 90%. It is preferably 20 to 80%, more preferably 30 to 75%.
  • the opening ratio of the gap 6 specifies the contact area between the end plate 3 and the end separator 4. This is because the end plate 4 comes into contact with the end separator 4 in a portion where the gap 6 is not provided.
  • an end plate having a void opening ratio of 60% has a contact area with the end separator of 40% of the entire joining surface.
  • the end plate can adjust the suppression of heat transfer between the end plate and the end separator not only by the aperture ratio of the gap in the joint surface but also by the location where the gap is provided, the shape and size of the gap.
  • the end plate 3 shown in FIG. 12 is formed by integrally forming intersecting ribs 14 inside the recesses 13, and the ribs 14 divide the recesses 13 into a plurality of partition recesses 13A and 13B.
  • the illustrated end plate 3 is provided with an H-shaped rib 14 inside the recess 13 to divide the recess 13 into four partition recesses 13A and 13B.
  • the H-shaped rib 14 shown in FIG. 12 includes two upper and lower ribs 14A provided on both sides of the recess 13 and one horizontal rib 14B formed by connecting the middle of these upper and lower ribs 14A.
  • the end plate 3 shown in the figure is provided between the two upper and lower ribs 14A and above and below the horizontal ribs 14B, and is provided with a shallow container-shaped partitioning recess 13A extending in the width direction and two upper and lower ribs 14A.
  • a groove-shaped partitioning recess 13B extending in the up-down direction is provided.
  • the end plate 3 having this structure has a wide partition recess 13A provided in the central portion to suppress heat transfer in the central portion where the temperature of the secondary battery cell 1 is the highest, and to form a groove-like shape extending vertically.
  • the partition recess 13B suppresses heat transfer in the left-right direction. This effectively prevents the secondary battery cells 1 positioned at both ends of the battery stack 9 from being cooled more than the other secondary batteries and BR> Z1.
  • the end plate 43 shown in FIGS. 13 and 14 is provided with a plurality of rows of ribs 54 that are integrally molded inside the recess 53.
  • the end plate 43 shown in the drawing crosses a plurality of rows of upper and lower ribs 54A and a plurality of rows of horizontal ribs 54B in a lattice pattern, and regions defined by these ribs 54 are defined as partition recesses 53A and 53B.
  • the end plate 43 having this structure is provided with partitioning recesses 53A and 53B over almost the entire joint surface with the end separator 44, thereby increasing the opening ratio of the gap 6 on the joint surface, and Heat transfer can be effectively suppressed. Further, the mechanical strength can be improved by the plurality of ribs 54 intersecting with each other. In addition, the end plate 43 can adjust the mechanical strength of the whole end plate 43 and the contact area of the end plate 43 and the end separator 44 by adjusting the thickness of the plurality of ribs 54.
  • the end plate has a mechanical strength by appropriately changing the shape and number of ribs provided inside the recesses, and the number, shape, size, etc. of the partition recesses divided by these ribs. While maintaining the optimal state, it is possible to adjust the contact area between the end plate and the end separator on the joining surface, thereby adjusting the suppression of heat transfer between the end separator and the end plate.
  • the pair of end plates 3 arranged at both ends of the battery block 11 are fastened via a pair of connecting fixtures 5 arranged on both side surfaces of the battery stack 9 as shown in FIGS.
  • the end plate 3 shown in FIGS. 10 and 11 is provided with a connection recess 3a of the connection fixture 5 on the outer surface so that the connection fixture 5 can be fixed in place.
  • the shape of the connection recess 3 a is a shape that allows the connection portion 5 ⁇ / b> B of the connection fixture 5 to be fitted.
  • the end plate 3 shown in the drawing is provided with a female screw hole 3b in the connecting recess 3a for screwing a set screw 19 for fixing the connecting portion 5B of the connecting fixture 5.
  • the end plate 3 shown in the figure is provided with a female screw hole 3b opened in the connecting recesses 3a provided on both sides of the outer surface so as to be separated vertically.
  • the end plate 3 is a bolt that is a connecting member for fixing the battery block 11 disposed on the upper surface of the cooling plate 31 to the cooling plate 31 as shown in FIGS. 4, 6, 7, and 9.
  • An insertion hole 3 d for inserting 7 is provided.
  • the end plate 3 is fixed to the cooling plate 31 via bolts 7 penetrating in the vertical direction in the figure. Therefore, the end plate 3 shown in the figure is provided with an insertion hole 3d vertically extending through the threaded portion of the bolt 7.
  • the insertion hole 3d has an inner diameter that is substantially equal to or slightly larger than the outer diameter of the bolt 7 inserted therein.
  • the end plate 3 in FIGS. 6, 10, and 11 has insertion holes 3d on both sides of the central portion.
  • the end plate 3 has an insertion hole 3d that is located on the center side of the female screw hole 3b so as not to intersect with the female screw hole 3b provided on both sides.
  • the insertion hole 3d is structured not to be connected to the recess 13 provided on the end separator 4 side.
  • this end plate 3 is provided with upper and lower ribs 14A facing the portion where the insertion hole 3d is opened, and by inserting partitioning recesses 13A and 13B on both sides of the upper and lower ribs 14A, the end plate 3 is inserted.
  • the hole 3d and the recess 13 are not connected.
  • the end plate can also be provided with a recess 53 so as to face the portion where the insertion hole 3 d is opened.
  • a partition recess 53B provided opposite to the opening of the insertion hole 3d is formed shallower than the partition recess 53A provided in another region so that the recess 53 is not connected to the insertion hole 3d. I have to.
  • the end plate 3 is provided with a notch recess 3e for accommodating the head of the bolt 7 at the upper end of the insertion hole 3d.
  • the notch recess 3 e has an inner shape that can rotate the bolt 7 while guiding the head of the bolt 7.
  • the notch recess 3e in the figure has a depth at which the head 7A of the bolt 7 does not protrude from the surface of the end plate 3 in a state where the bolt 7 is inserted into the insertion hole 3d.
  • the end separator 4 shown in FIGS. 7 to 12 includes a heat insulating piece 15 interposed between the end plate 3 and the cooling plate 31 in order to suppress heat transfer between the end plate 3 and the cooling plate 31. ing.
  • the end separator 4 shown in the figure is connected to the lower end portion of the flat plate 4a and integrally provided with a heat insulating piece 15 protruding toward the end plate 3 side.
  • the protruding amount of the heat insulating piece 15 is substantially equal to the thickness of the end plate 3, and the heat insulating piece 15 covers the entire lower surface of the end plate 3.
  • the heat insulating piece 15 interposed between the end plate 3 and the cooling plate 31 prevents the end plate 3 from coming into direct contact with the cooling plate 31, thereby exchanging heat between the end plate 3 and the cooling plate 31. Suppressed.
  • This heat insulation piece 15 can suppress the cooling of the end plate 3 by increasing the thickness.
  • the thickness of the heat insulating piece is increased, the vertical width of the enplate 31 is shortened, and the region for pressing both end faces of the battery stack 9 is narrowed. Therefore, the heat insulating piece 15 is determined to have an optimum thickness in consideration of these matters.
  • the end separator 4 holds the end plate 3 from above and below by a heat insulating piece 15 and a guide portion 4f.
  • the heat insulating piece 15 shown in the figure has a gap 16 on the joint surface with the cooling plate 31.
  • a concave portion 15 ⁇ / b> A is partially provided on the joint surface with the cooling plate 31, and a gap 16 is provided at a boundary portion with the cooling plate 31 by the concave portion 15 ⁇ / b> A.
  • the end separator 4 shown in the drawing is provided with a concave portion 15 ⁇ / b> A having an opening at an end surface in the protruding direction of the heat insulating piece 15 and a joint surface serving as a boundary with the cooling plate 31.
  • the concave portion 15A having this shape can be molded with a mold having a simple structure while simplifying the mold drawing direction when the end separator 4 is molded.
  • the recess provided in the heat insulating piece does not necessarily need to be provided with an opening on the end face side in the projecting direction, and may have a shape having an opening only on a joint surface serving as a boundary with the cooling plate.
  • the heat insulating piece including the concave portion having this structure can be firmly supported by bringing the opening edge of the concave portion into contact with the upper surface of the cooling plate. For this reason, it can prevent effectively that a heat insulation piece deform
  • the heat insulating piece 15 shown in the drawing has a lower surface joined to the upper surface of the cooling plate 31 without providing a recess 15A at both ends and the portion through which the bolt 7 for fixing the end plate 3 to the cooling plate 31 passes.
  • the supporting leg portion 15B is formed.
  • the end separator 4 supports the lower surface of the support leg portion 15B of the heat insulating piece 15 by bonding it to the upper surface of the cooling plate 31, and also has a recess 15A formed between the support leg portions 15B and the cooling plate 31.
  • a gap 16 is provided on the joint surface.
  • the structure in which the gap 16 is provided in the joint surface between the heat insulating piece 15 and the cooling plate 31 has a feature that the heat transfer between the end plate 3 and the cooling plate 31 can be more effectively suppressed.
  • the heat insulating piece 15 is a support leg portion 15B located in the middle, and a sleeve 17 for inserting the bolt 7 is disposed in a portion through which the bolt 7 passes.
  • the sleeve 17 is a metal cylinder.
  • the sleeve 17, which is a metal cylinder, has an inner diameter that is substantially equal to or slightly larger than the outer diameter of the bolt 7 inserted through the sleeve 17.
  • the sleeve 17 effectively prevents the heat insulating piece 15 from being deformed by the tightening pressure of the bolt 7 in a state where the bolt 7 inserted therein is fixed to the cooling plate 31.
  • the bolt 7 that fixes the end plate 3 to the cooling plate 31 is also firmly fixed because it also serves to fix the battery block 11.
  • the heat insulating piece 15 made of an insulating material such as plastic is interposed between the end plate 3 and the cooling plate 31, the heat insulating piece 15 may be deformed by the tightening pressure of the bolt 7.
  • the structure in which the recess 15A is provided on the lower surface of the heat insulating piece 15 and the gap 16 is provided on the joint surface with the cooling plate 31 supports the tightening pressure of the bolt 7 only by the support leg 15B. It becomes easier to concentrate. If the heat insulating piece is deformed by tightening the bolts, the cooling plate cannot be connected in a posture parallel to the bottom surface of the battery block, and the contact between the cooling plate and the battery block is deteriorated.
  • the bolt 7 for fixing the end plate 3 is inserted and fixed through the sleeve 17, and the end plate 3 and the cooling plate 31 are fixed by the sleeve 17. Is maintained at a predetermined interval, and the deformation of the heat insulating piece 15 is reliably prevented. That is, even when the cooling plate 31 is strongly fastened via the bolt 7, it is possible to prevent the contact property between the cooling plate 31 and the battery block 11 from being deteriorated.
  • the heat insulating piece 15 since the sleeve 17 inserted into the heat insulating piece 15 can keep the interval between the end plate 3 and the cooling plate 31 at a predetermined interval, the heat insulating piece regardless of the presence or absence of the recess 15 ⁇ / b> A provided in the heat insulating piece 15. It is possible to reinforce the heat insulating piece 15 by inserting it into 15. However, a heat insulating piece without a recess or a thin heat insulating piece can be supported only by the heat insulating piece without necessarily providing a sleeve. (Example 2)
  • FIGS. 17 to 19 a battery block 61 according to the power supply device of Example 2 of the present invention is shown in FIGS.
  • the end plate 63 of the battery block 61 shown in these figures is divided into a first divided plate 63A and a second divided plate 63B in the penetration direction of the bolts 7 that penetrate vertically in the figures.
  • a first divided plate 63A and a second divided plate 63B shown in FIGS. 17 to 19 are obtained by dividing an end plate 63 having an outer shape substantially equal to the outer shape of the secondary battery cell 1 into two parts in the vertical direction, and the first divided plate 63A.
  • the first divided plate 63 ⁇ / b> A and the second divided plate 63 ⁇ / b> B are located on both sides of the central portion, and are inserted with bolts 7 that are connecting members for fixing the battery block 61 to the cooling plate 31.
  • An insertion hole 3d is provided.
  • the first divided plate 63A and the second divided plate 63B have an insertion hole 3d at positions facing each other. Further, the first divided plate 63A is provided with a notch recess 3e for accommodating the head of the bolt 7 at the upper end of the insertion hole 3d.
  • the first divided plate 63A and the second divided plate 63B are provided with a gap 6 on the joint surface with the end separator 64 as shown in FIG.
  • the end plate 63 shown in FIGS. 15 and 19 is provided with a recess 73 by recessing the joint surface with the end separator 64 in a concave shape.
  • the end plate 63 is provided with a gap 6 at a boundary portion with the end separator 64 by an opening of a recess 73 provided on the joint surface. Further, as shown in FIGS. 15 and 19, the end plate 63 is provided with a rib 74 inside the recess 73.
  • the rib 74 is integrally formed in a shape protruding from the bottom surface of the recess 73, and the tip edge is in contact with the end separator 64.
  • the illustrated end plate 63 includes ribs 74 formed of two upper and lower ribs 74A provided on both sides of the recess 73, and the rib 74 divides the recess 73 into a plurality of partition recesses 73A and 73B.
  • the illustrated end plate 63 is located between the two upper and lower ribs 74A, provided with a shallow and wide container-like partitioning recess 73A extending in the width direction, and positioned outside the two upper and lower ribs 74A.
  • a groove-shaped partitioning recess 73B extending in the vertical direction is provided.
  • the end plate 63 having this structure also has a groove-shaped recess extending in the vertical direction provided on the left and right sides while suppressing heat transfer in the central portion where the temperature of the secondary battery cell 1 is highest by the wide partition recess 73A provided in the central portion. Heat transfer in the left-right direction is suppressed by the partition recess 73B.
  • the end separator 64 includes a heat insulating piece 15 interposed between the lower second divided plate 63B and the cooling plate 31, and is interposed between the first divided plate 63A and the second divided plate 63B.
  • a heat insulating wall 75 is provided.
  • the heat insulating piece 15 is provided to suppress heat transfer between the second divided plate 63B and the cooling plate 31, and as described above, the concave surface 15A is provided on the lower surface side, and the joint surface with the cooling plate 31 is provided.
  • a gap 16 is provided in Further, the heat insulating piece 15 reinforces the support leg 15B by inserting a sleeve 17 for inserting the bolt 7 into the support leg 15B located between the recesses 15A.
  • the heat insulating wall 65 is provided to suppress heat transfer between the first divided plate 63A and the second divided plate 63B, and protrudes from the intermediate portion of the flat plate 4a of the end separator 64 to the end plate 63 side. It is integrally molded.
  • the protruding amount of the heat insulating wall 75 is substantially equal to the thickness of the end plate 63, and the heat insulating wall 75 covers the entire opposing surface of the first divided plate 63A and the second divided plate 63B. Further, the heat insulating wall 75 is provided with an insertion hole 75a at a portion where the bolt 7 is inserted.
  • the end plate 63 is divided into the first divided plate 63A and the second divided plate 63B, and the heat insulating wall 75 provided on the end separator 64 is interposed between the first divided plate 63A and the second divided plate 63B.
  • heat transferred from the upper part of the secondary battery cell 1 located at both ends of the battery stack 9 to the first divided plate 63A is transferred from the first divided plate 63A to the second divided plate 63B through the heat insulating wall 75.
  • heat is transferred from the second divided plate 63 ⁇ / b> B to the cooling plate 31 through the heat insulating piece 15. For this reason, it can prevent effectively that the temperature of the secondary battery cell 1 located in the both ends of the battery laminated body 9, especially the temperature of the upper part of the secondary battery cell 1 becomes lower than the other secondary battery cell 1.
  • connection fixture 5 is fixed to the end plates 3 arranged on both end faces of the battery stack 9 and fastens the battery stack 9 in the stacking direction via the end plates 3. 2 to 4 are extended in the stacking direction of the battery stack 9, and both ends are fixed to the pair of end plates 3 to fasten the battery stack 9 in the stacking direction.
  • the connecting fixture 5 shown in the figure is arranged to face both side surfaces of the battery stack 9.
  • surfaces of the battery laminated body 9, and is fastened can fasten a some battery cell more reliably in a lamination direction.
  • the connecting fixtures are not necessarily arranged on both side surfaces of the battery stack. In addition to the both side surfaces of the battery stack, the connection fixture can be disposed on the top surface and the bottom surface, or can be disposed only on the top surface and the bottom surface without being disposed on both side surfaces.
  • the connection fixture 5 is a metal plate having a predetermined width and a predetermined thickness along the surface of the battery stack 9.
  • the connecting fixture 5 can be a metal plate such as iron, preferably a steel plate.
  • the connection fixture 5 made of a metal plate is bent at both ends of the main body 5A and the main body 5A arranged along the side surface of the battery stack 9, and the end plate 3 And an upper surface holding portion 5C that is bent above the main body portion 5A and holds the upper surface of the battery stack 9.
  • the main body 5 ⁇ / b> A has a substantially rectangular shape with an area substantially equal to the side surface of the battery stack 9.
  • the main body 5A shown in the figure is provided with an opening 5D to reduce the overall weight while reducing the cost.
  • the connecting fixture 5 shown in the figure is bent at substantially right angles along the outer surface of the end plate 3 to provide both ends of the connecting fixture 5B.
  • the connection portions 5 ⁇ / b> B at both ends are connected to the end plate 3, so that the connection portions 5 ⁇ / b> B of the connection fixture 5 are locked to the pair of end plates 3 arranged at both ends of the battery stack 9.
  • the battery stack 9 is sandwiched from both ends so that the pair of end plates 3 are at a predetermined interval.
  • connection portions 5 ⁇ / b> B are connected to connection recesses 3 a provided on both sides of the end plate 3, and the pair of end plates 3 are connected by the two connection fixtures 5. Accordingly, the connecting portion 5 ⁇ / b> B of the connecting fixture 5 is bent along the connecting recess 3 a of the end plate 3. Further, both ends of the connection fixture 5 are fixed to the end plate 3 with set screws 19.
  • the connecting fixture 5 shown in the figure is provided with a through hole into which the set screw 19 is inserted in the connecting portion 5B so as to be opened up and down.
  • the connecting fixture 5 is configured such that a set screw 19 is inserted into the through hole in a state in which the connecting portions 5B at both ends are fitted into the connecting recess 3a of the end plate 3, and the set screw 19 is provided in the connecting recess 3a of the end plate 3. It is screwed into the female screw hole 3d and fixed to the pair of end plates 3. (Example 3)
  • the battery block 11 is arranged between the secondary battery cells 1 stacked on each other to form a battery stack 9 by disposing an insulating separator 2, and is disposed on both end faces of the battery stack 9.
  • An end separator 4 is disposed between the end plate 3 and the secondary battery cells 1 located at both ends.
  • the secondary battery cells adjacent to each other can be formed by a method such as forming the outer can of the secondary battery cell with an insulating material, or covering the outer periphery of the outer can of the secondary battery cell with an insulating sheet or insulating paint. It is because a separator and an end separator can be made unnecessary by insulating.
  • the battery block 71 shown in FIG. 20 and FIG. 21 is a battery stack 89 in which a plurality of secondary battery cells 81 are stacked without a separator, and end separators are interposed between both end faces of the battery stack 89.
  • the end plate 83 is arranged without doing so, and the pair of end plates 83 are fastened by the connecting fixture 5. Since this structure omits the separator and the end separator, it has a feature that it can be manufactured at low cost while reducing the outer shape and reducing the size.
  • the end plate 83 shown in FIGS. 20 and 21 is also made of metal, and a concave portion 13 is provided by recessing the joint surface with the opposing secondary battery cell 81 into a concave shape.
  • the end plate 83 has a gap 6 at the boundary with the secondary battery cell 81 by the opening of the recess 13 provided on the joint surface.
  • the end plate 83 is provided with ribs 14 inside the recess 13. The rib 14 is integrally formed in a shape protruding from the bottom surface of the recess 13, and the tip edge is in contact with the secondary battery cell 81.
  • the end plate 83 in the figure is in contact with the main surface of the secondary battery cell 81 with the outer peripheral portion of the surface facing the secondary battery cell 81 and the tip surface of the rib 14 provided in the recess 13 being the same plane. ing.
  • the end plate 83 is provided with a gap 6 at the joint surface with the secondary battery cell 81, and the end surface of the rib 14 is brought into contact with the secondary battery cell 81, thereby contacting the end plate 83 and the secondary battery cell 81.
  • heat transfer between the end plate 3 and the secondary battery cell 81 is suppressed.
  • the metal end plate can improve insulation and heat insulation by attaching an insulating sheet to the surface facing the secondary battery cell or by applying an insulating coating.
  • the end plate 83 shown in FIG. 20 and FIG. 21 is provided with a gap 16 on the lower end surface of the end plate 83 and the joint surface with the cooling plate 31 in order to suppress heat transfer between the cooling plate 31 and the end plate 83.
  • the end plate 83 shown in the drawing partially has a concave portion 83A that opens downward on the joint surface with the cooling plate 31, and the concave portion 83A provides a gap 16 at the boundary with the cooling plate 31.
  • the end plate 83 shown in the figure has a support leg portion in which the lower surface is joined to the upper surface of the cooling plate 31 without providing the recess 83A at both ends and the portion through which the bolt 7 fixed to the cooling plate 31 passes.
  • 83B is formed.
  • the end plate 83 supports the lower surface of the support leg 83B by bonding it to the upper surface of the cooling plate 31, and has a recess 83A formed between the support legs 83B so that a gap is formed in the bonding surface with the cooling plate 31. 16 is provided.
  • the structure in which the gap 16 is provided on the joint surface between the end plate 83 and the cooling plate 31 has a feature that the heat transfer between the end plate 83 and the cooling plate 31 can be more effectively suppressed.
  • the power supply device has a structure in which an end separator is arranged between the secondary battery cells located at both ends and the end plate without arranging a separator between the respective secondary battery cells, or each secondary battery cell.
  • a separator may be disposed between the secondary battery cells, and the end separator may not be disposed between the secondary battery cells located at both ends and the end plate.
  • the top cover 25 has a top cover 25 on the top surface.
  • the top cover 25 is provided with an opening window 25 a for connecting the electrode terminal 1 b of each secondary battery cell 1 with the bus bar 12.
  • a gas duct 26 communicating with the safety valve 1 c of the secondary battery cell 1 is provided on the inner surface of the top cover 25.
  • the top cover 25 covers the upper surface of the battery block 11 and covers and protects the bus bar 12 and the circuit board (not shown) connected to the secondary battery cell 1. Accordingly, the top cover 25 has an outer shape capable of covering the upper surface of the battery block 11 and is molded of plastic into a shape having a space in which a circuit board or the like can be accommodated.
  • the top cover 25 shown in FIGS. 2 and 4 is entirely formed into a shallow container shape with a lower opening, and the central portion is formed one step deeper than the surroundings to provide a storage recess for storing the circuit board. Yes. (Thermal conductive sheet 12)
  • a heat conductive sheet 29 is disposed between the bottom surface 1D of the secondary battery cell 1 and the cooling plate 31.
  • the thermal conductive sheet 29 is preferably made of a material having electrical insulation and excellent thermal conductivity, and further having a certain degree of elasticity. Examples of such a material include acrylic, urethane, epoxy, and silicone resins.
  • the heat conductive sheet 29 having insulating properties and excellent thermal conductivity can enhance the cooling performance of the cooling plate 31 while electrically insulating the secondary battery cell 1 and the cooling plate 31. it can.
  • the cooling plate 31 is a heat radiating member for transporting the heat of the secondary battery cell 1 to a radiator or the like and dissipating the heat to the outside. As shown in FIGS. 7, 9, and 22, a refrigerant pipe 32 is provided inside the cooling plate 31. Is arranged. The cooling plate 31 connects the refrigerant piping 32 disposed therein to the cooling mechanism 30. The cooling plate 31 is cooled by supplying refrigerant from the cooling mechanism 30 to the refrigerant pipe 32.
  • the cooling plate 31 incorporates a metal cooling pipe 32A as a refrigerant pipe 32 through which the refrigerant passes.
  • the cooling pipe 32A is in contact with the upper surface plate 31A of the cooling plate 31, and a heat insulating material 38 is provided between the cooling plate 31A and the bottom plate 31B to insulate the bottom plate 31B.
  • the cooling pipe 32 ⁇ / b> A is formed in a flat shape having a flat surface facing the battery block 11.
  • the cooling pipe 32A is made of a material having excellent heat conduction.
  • it is made of metal such as aluminum.
  • the aluminum cooling pipe is relatively soft, the surface can be slightly deformed by pressing at the contact interface with the battery block 11 to improve the contact property, and high heat transfer can be realized.
  • the cooling plate 31 extends in the stacking direction of the secondary battery cells 1, and the cooling pipe 32 ⁇ / b> A piped therein is meandered so as to be folded back at the edge, thereby forming three straight lines.
  • a cooling pipe is disposed on the lower surface of the battery block 11. Then, the cooling pipes 32 ⁇ / b> A are connected to each other between the battery stack continuums 11 ⁇ / b> A, thereby sharing the refrigerant circulation path.
  • the cooling mechanism 30 can be shared and the cooling plate 31 is made common and cheaper and simplified cooling.
  • the mechanism 30 can be realized.
  • position a cooling pipe can be changed suitably.
  • the cooling plate 31 shown in FIGS. 8 and 9 is fixed to the battery stack 9 via bolts 7 penetrating the end plate 3.
  • the cooling plate 31 shown in the drawing has a connection hole 39 opened at the insertion position of the bolt 7 in order to screw and fix the bolt 7 penetrating the end plate 3, and a nut portion 18 is provided in the connection hole 39. Yes.
  • the cooling plate 31 shown in the drawing is provided with a nut portion 18 by fixing a nut member between a top plate 31A and a bottom plate 31B.
  • the cooling plate 31 is fixed to the end plate 3 by screwing the tip end portion of the bolt 7 penetrating the end plate 3 into the nut portion 18.
  • the cooling plate 31 having the nut portion 18 therein can connect the end plate 3 without causing the tip of the bolt 7 to protrude from the lower surface of the cooling plate 31.
  • the cooling plate is not necessarily provided with a nut portion inside, and can be fixed to the lower surface or fastened via a nut into which a bolt penetrating the cooling plate is screwed.
  • Such a connection structure can open a through hole that allows the tip of the bolt to pass through the cooling plate, and can fix the bolt that passes through the through hole by screwing it into a nut.
  • the battery block can be connected to the cooling plate via a bolt and can be connected to the cooling plate using another connection structure.
  • a fastening member that is bent in a U-shape is arranged on the lower surface side of the cooling plate to hold the cooling plate, and both ends of the fastening member are connected and fixed. It is also possible to connect the central part of the cooling plate to the battery stack by connecting to the main body. (Cooling mechanism 30)
  • the cooling mechanism 30 cools the cooling plate 31 by circulating the refrigerant through the refrigerant pipe 32 of the cooling plate 31.
  • the cooling mechanism 30 in FIG. 22 supplies a coolant such as water or a coolant to the coolant pipe 32, and cools the cooling plate 31 directly with a low-temperature coolant.
  • a cooling mechanism that circulates water, coolant, or the like as the coolant may be configured to cool water or coolant with the heat of vaporization of the coolant.
  • an existing cooling mechanism used for cooling the interior of the vehicle can be used for cooling water or coolant.
  • FIG. 22 shows a cooling mechanism 30 employing such a configuration.
  • first cooling mechanism 30A for cooling the cooling plate 31 with a coolant
  • second cooling mechanism 30B for cooling the vehicle interior using a refrigerant such as an indoor air conditioner by an intermediate heat exchanger 33.
  • first cooling mechanism 30A a pump 35, a three-way valve 36, an intermediate heat exchanger 33, a heater 40, and a cooling plate 31 are arranged in a first circulation path 34 indicated by a thick line. Further, it is also connected to a radiator 37 through a three-way valve 36.
  • the radiator 37 is air-cooled by outside air, and when the outside air temperature is low, the three-way valve 36 is switched from the intermediate heat exchanger 33 to the radiator 37 side, and energy consumption required for cooling such as power of the compressor 45 described later can be suppressed.
  • the second cooling mechanism 30B is provided with a compressor 45, an intermediate heat exchanger 33, an evaporator 46, and a condenser 47 in a second circulation path 44 indicated by a thin line.
  • the intermediate heat exchanger 33 and the evaporator 46 are connected in parallel via expansion valves 48 and 49, respectively.
  • a fan 41 is in close proximity to the condenser 47.
  • the fan 41 can also be used for heat dissipation of the radiator 37.
  • the cooling mechanism 30 includes a control circuit (not shown) that controls the cooling of the cooling plate 31, detects the temperature of the battery cell 1 with a temperature sensor (not shown), and controls the cooling state of the cooling plate 31. You can also This control circuit controls the operation of the pump 35 that circulates a coolant such as water or coolant through the cooling plate 31. The operation state of the pump 35 is controlled by the control circuit, and the circulation of the refrigerant to the cooling plate 31 is controlled. In the cooling mechanism 30, the cooling state of the cooling plate 31 is controlled by the operating state of the pump 35.
  • the cooling mechanism 30 circulates the refrigerant to the cooling plate 31 to cool it, and when the battery cell 1 becomes lower than the cooling stop temperature, The circulation of the refrigerant to the cooling plate 31 is stopped, and the battery cell 1 can be controlled to a preset temperature range. Further, the control circuit can control the cooling state by adjusting the circulation amount of the refrigerant by the pump according to the temperature of the secondary battery cell.
  • the cooling mechanism can also circulate refrigerant such as chlorofluorocarbon, alternative chlorofluorocarbon or carbon dioxide gas through the refrigerant pipe and cool the cooling plate with the heat of vaporization that evaporates inside the refrigerant pipe.
  • the cooling mechanism includes a compressor that pressurizes the gaseous refrigerant discharged from the cooling plate, a condenser that cools and liquefies the refrigerant pressurized by the compressor, and a liquid liquefied by the condenser.
  • a receiver tank to be stored, and an expansion valve made up of a flow rate adjusting valve or a capillary tube for supplying refrigerant from the receiver tank to the cooling plate can be provided.
  • This cooling mechanism supplies the liquefied refrigerant to the cooling plate via the expansion valve, vaporizes the supplied refrigerant inside the refrigerant path, and cools the cooling plate with heat of vaporization.
  • the refrigerant vaporized by cooling the cooling plate is sucked into the compressor and circulated from the condenser to the receiver tank.
  • this cooling mechanism can also be used as a vehicle interior cooling compressor, condenser, and receiver tank mounted on the vehicle. This structure can efficiently cool the battery block of the power supply device mounted on the vehicle without providing a dedicated cooling mechanism for cooling the battery block.
  • the cooling mechanism 30 can also heat the cooling plate 31 by heating a coolant such as water or a coolant circulated through the coolant pipe 32.
  • the power supply device may be exposed to a severe environment of extremely low temperature depending on the usage environment such as a cold region or winter. Under such an environment, the output of the secondary battery cell is reduced, but the output of the secondary battery cell can be effectively prevented by heating the secondary battery cell constituting the battery stack.
  • the heater 40 is disposed in the first circulation path 34. In this structure, the cooling plate 31 can be heated by heating the water, cooling liquid, or the like circulated through the cooling plate 31 with the heater 40 and circulating the heated water or cooling liquid through the cooling plate 31.
  • the power supply apparatus can prevent the output of the secondary battery cell 1 from being lowered by heating the secondary battery cell 1 via the cooling plate 31 in the cryogenic state.
  • the secondary battery cell 201 is interposed via the cooling plate 231 in a state where the conventional battery block 211 formed by stacking a large number of secondary battery cells 201 is exposed to an extremely low temperature.
  • the end plate 203 is heated by the cooling plate 231 in the graph of FIG. 26 (b) in the graph of FIG. 26B, both ends of the secondary battery cell 201 in the stacked state are heated.
  • the temperature of the secondary battery cell 201 located at is higher than the temperature of the secondary battery cell 201 located at the center.
  • the secondary battery cell 201 located in the center portion is not heated by the cooling plate 231 because the low-temperature secondary battery cells 201 are stacked on both sides, whereas the secondary battery cell 201 located at both ends is not easily heated. This is because the end plate is easily heated.
  • the chain line curve C indicates the temperature distribution of the plurality of secondary battery cells to be heated
  • the chain line curve D indicates the temperature distribution of the cooling plate to be heated.
  • the gap 6 is provided on the joint surface between the end separator 4 and the end plate 3 to reduce the contact area between the end plate 3 and the end separator 4.
  • the secondary battery cell 1 to be heated can be prevented from being heated more than the other secondary battery cells 1 by the end plate 3 having excellent heat conductivity.
  • the secondary battery cells positioned at both ends of the battery stack are suppressed from being heated by the end plate,
  • the secondary battery cells can be uniformly heated, and variations in temperature distribution among the plurality of secondary battery cells can be reduced.
  • the cooling plate 31 described above has a structure in which a refrigerant is circulated through the refrigerant pipe 32 disposed therein to cool or heat.
  • the cooling plate that dissipates heat from the secondary battery cells and cools the secondary battery cells is not specified as a structure that adds a cooling function using such a refrigerant.
  • a cooling plate can also be comprised only with a metal plate or a metal body.
  • a metal body provided with heat radiation fins can have a shape excellent in heat dissipation and heat transfer, or an excellent heat dissipation performance can be realized as a metal body having a large heat capacity.
  • the power supply device can also use the metal outer case 20 that is the casing 90 that houses the battery stack 9 as a cooling plate that dissipates the heat of the secondary battery cells 1.
  • the power supply device that also uses the exterior case 20 as a cooling plate does not necessarily require the cooling plate to be cooled by the cooling mechanism, and the heat of the secondary battery cell 1 is transferred to the metal exterior case 20 that is the casing 90. It can be transmitted to the outside to dissipate heat. Furthermore, the heat dissipation effect can be improved by blowing air to the exterior case 20.
  • a housing to which the power supply device is fixed can be used as a cooling plate that dissipates heat from the secondary battery cell.
  • a metal plate or a metal frame that is a vehicle casing 92 is used as a cooling plate 91, and the battery block 11 is directly fixed to the cooling plate 91.
  • the heat of the secondary battery cell 1 can be radiated to the outside through the housing 92.
  • the exterior case 20 that is the casing 90 is fixed to the casing 92, and the casing 90 and the casing 92 are used as a cooling plate 91 to radiate the heat of the secondary battery cell 1 to the outside. be able to.
  • a base such as a base on which the power supply device is installed or a fixing plate can be used as the cooling plate.
  • the battery block can be directly fixed to the casing, or the outer case as a casing can be fixed to the casing, and the heat of the secondary battery cell can be radiated to the outside via the cooling plate.
  • These cooling plates are passively cooled and dissipate heat of the secondary battery cells without being actively cooled via the cooling mechanism.
  • the above power supply apparatus can be used as a vehicle-mounted power supply.
  • a vehicle equipped with a power supply device an electric vehicle such as a hybrid vehicle or a plug-in hybrid vehicle 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 device for hybrid vehicles)
  • FIG. 23 shows an example in which a power supply device is mounted on a hybrid vehicle that runs 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 travel motor 93 for running / BR> S the vehicle HV, a power supply device 100 for supplying power to the motor 93, and a battery of the power supply device 100. And a generator 94 for charging.
  • the power supply apparatus 100 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 power supply device 100.
  • 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 power supply device 100.
  • the generator 94 is driven by the engine 96 or is driven by regenerative braking when the vehicle is braked to charge the battery of the power supply device 100. (Power supply for electric vehicles)
  • FIG. 24 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 power supply device 100 that supplies power to the motor 93, and a generator 94 that charges a battery of the power supply device 100.
  • the power supply apparatus 100 is connected to a motor 93 and a generator 94 via a DC / AC inverter 95.
  • the motor 93 is driven by power supplied from the power supply device 100.
  • the generator 94 is driven by energy when regeneratively braking the vehicle EV and charges the battery of the power supply device 100. (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 facility.
  • 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 apparatus 100 shown in this figure forms a battery unit 82 by connecting a plurality of battery packs 81 in a unit shape. Each battery pack 81 has a plurality of secondary battery cells 1 connected in series and / or in parallel. Each battery pack 81 is controlled by a power controller 84.
  • the power supply apparatus 100 drives the load LD after charging the battery unit 82 with the charging power supply CP. For this reason, the power supply apparatus 100 includes a charging mode and a discharging mode.
  • the load LD and the charging power source CP are connected to the power supply device 100 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 100.
  • the power supply 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 apparatus 100.
  • 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 apparatus 100 to the load LD.
  • the charge switch CS can be turned on and the discharge switch DS can be turned on to supply power to the load LD and charge the power supply device 100 at the same time.
  • the load LD driven by the power supply device 100 is connected to the power supply device 100 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 apparatus 100.
  • 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 100.
  • the power controller 84 also includes a communication interface for communicating with external devices. In the example of FIG. 25, 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 pack 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 packs 81 in series and in parallel.
  • the battery units 82 are connected to the output line OL via the parallel connection switch 85 and are connected in parallel to each other.
  • 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.
  • SYMBOLS 100 Power supply device 1 ... Secondary battery cell 1A ... Main surface; 1B ... Side surface; 1C ... Top surface; 1D ... Bottom surface 1a ... Sealing plate; 1b ... Electrode terminal; 1c ... Safety valve 2 ... Separator 2A ... Storage part; Opening 2a ... Flat plate; 2b ... Side wall; 2c ... Top plate; 2d ... Projection piece 3 ... End plate 3a ... Connection recess; 3b ... Female screw hole; 3c ... Fitting projection 3d ... Insertion hole; 3e ... Notch recess 4 4B ... Opening; 4C ... Fitting recess 4a ... Flat plate; 4b ...
  • Evaporator 47 ... Condenser 48 ... Expansion valve 49 ... Expansion valve 51 ... Secondary battery cell 53 ... 53B ... partition recess 54 ... rib 54A ... upper and lower ribs; 54B ... lateral rib 59 ... battery stack 61 ... battery block 63 ... end plate 63A ... first split plate; 63B ... second split plate 64 ... End separator 71 ... Battery block 73 ... Recess 73A ... Partition recess; 73B ... Partition recess 74 ... Rib 74A ... Vertical rib 75 ... Thermal insulation wall 75a ... Insertion hole 81 ... Battery pack 82 ... Battery unit 83 ... End plate 83A ...

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

Abstract

Le problème à résoudre dans le cadre de la présente invention consiste à empêcher une variation de température dans de multiples cellules de batterie rechargeable (1) et de réguler de façon uniforme la température. La solution proposée consiste en un dispositif d'alimentation électrique qui est caractérisée par le fait qu'il est pourvu : d'un empilement de batteries (9) formé par empilement de multiples cellules de batterie rechargeable (1) ; de plaques d'extrémité métalliques (3) agencées au niveau des deux faces d'extrémité de l'empilement de batteries (9) pour fixer l'empilement de batteries (9) dans la direction d'empilement ; de séparateurs (2) qui présentent des propriétés isolantes et qui sont agencés entre les cellules de batterie rechargeable adjacentes (1) ; et des séparateurs d'extrémité (4) agencés entre les plaques d'extrémité (3) et les cellules de batterie rechargeable (1) situées au niveau de l'une ou l'autre extrémité de l'empilement de batteries (9) ; et d'une plaque de refroidissement (31) qui est agencée de sorte à faire face à une surface de l'empilement de batteries (9) et qui est raccordée dans un état de transfert de chaleur aux cellules de batterie rechargeable (1) qui forment l'empilement de batteries (9), ce qui permet de refroidir les cellules de batterie rechargeable (1). De plus, des entrefers (6) sont réalisés dans les surfaces de jonction entre les plaques d'extrémité (3) et les séparateurs d'extrémité (4).
PCT/JP2013/058214 2012-03-28 2013-03-22 Dispositif d'alimentation électrique, ainsi que véhicule et dispositif de stockage d'énergie pourvus de ce dernier WO2013146561A1 (fr)

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JP2012075220A JP2015111493A (ja) 2012-03-28 2012-03-28 電源装置及びこれを備える車両並びに蓄電装置

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