WO2014192087A1 - Module de batterie rechargeable au lithium-ion de type stratifié - Google Patents

Module de batterie rechargeable au lithium-ion de type stratifié Download PDF

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Publication number
WO2014192087A1
WO2014192087A1 PCT/JP2013/064831 JP2013064831W WO2014192087A1 WO 2014192087 A1 WO2014192087 A1 WO 2014192087A1 JP 2013064831 W JP2013064831 W JP 2013064831W WO 2014192087 A1 WO2014192087 A1 WO 2014192087A1
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WO
WIPO (PCT)
Prior art keywords
tab
secondary battery
ion secondary
battery module
lithium ion
Prior art date
Application number
PCT/JP2013/064831
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English (en)
Japanese (ja)
Inventor
秀和 藤村
Original Assignee
株式会社 日立製作所
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Filing date
Publication date
Application filed by 株式会社 日立製作所 filed Critical 株式会社 日立製作所
Priority to PCT/JP2013/064831 priority Critical patent/WO2014192087A1/fr
Publication of WO2014192087A1 publication Critical patent/WO2014192087A1/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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • 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
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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
    • H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a lithium ion secondary battery module structure.
  • Patent Document 1 JP-A-2005-222701
  • Patent Document 1 “one of the positive and negative terminals projecting out of the multilayer film from one cell constituting the laminated battery 4 and the multilayer film are projected from the cells adjacent in the stacking direction”
  • the positive and negative electrode terminals are disposed so as to be opposed to and bonded to one of the other terminals, and the joint portion projects from the opening 10 formed in the lid 6, and the opening 10 is an elastic sealing material Is filled and the joint portion is fixed. ”(See summary).
  • JP 2012-119176 A (patent document 2).
  • the battery assembly 1 is provided with “the unit cell 2 and the holder 3 for holding the unit cell 2, and the holder 3 is the unit cell 2 from between the other holder 3 for holding the unit cell 2.
  • Patent Document 1 since one of the different-pole terminals of the unit cells on the flat plate adjacent to each other in the stacking direction is disposed to be opposed to each other and joined, concentration of stress on the film-like battery case from which the terminal is derived Can be prevented.
  • the joint portion since the joint portion protrudes from the opening formed in the case and the opening is filled with the sealing material, the joint portion is fixed to the opening of the case, so that the terminal and the terminal protrude It is possible to prevent application of force to the film-like battery case and to improve the vibration resistance of the assembled battery, but how to incorporate the protruded terminal into the laminated battery structure, which is specific The structure is not presented.
  • the fluid is communicated with the passage through which the fluid flows, and the opening portion is opened toward the electrode protruding from the holding portion, so that the fluid can be directed toward the protruding electrode without providing the duct.
  • the flow can be concentrated and the cooling effect can be enhanced.
  • a holder is required for each unit cell, a seal portion is required between the holders and the structure becomes complicated.
  • the total volume of the holder occupies a large proportion of the entire assembled battery, and no consideration is given to the mounting density.
  • only gas can be used as a cooling medium, and there is a structurally difficult aspect regarding liquid cooling.
  • the present invention provides a lithium ion secondary battery module structure that enhances the heat dissipation effect and increases the energy density per volume of a battery module in which flat unit cells or laminate type cells are stacked.
  • a battery module in which a plurality of flat plate-type or laminate-type lithium ion secondary batteries are stacked and integrated in a housing, and covers the stacked battery main body and is adjacent to the positive electrode, negative electrode tab or in the stacking direction.
  • a first case in which only one matching pair of different-polarity tabs and a tab assembly in which the same-polarity tabs are joined is projected out of the casing from the same direction, and a second casing for storing the tab and the tab assembly.
  • the second housing includes a tab storage chamber in which each tab or tab assembly is covered and accommodated one by one with a partition wall, and a connection portion of tabs to the second housing, wiring , A control circuit board of the battery assembly, and a cooling mechanism.
  • the present invention it is possible to enhance the heat dissipation effect of the battery module and to increase the energy density per volume.
  • FIG. 1 is a cross-sectional view of a laminate type laminated battery. It is a bird's-eye view of the first case. It is sectional drawing of the side of a module. It is a bird's-eye view of the 2nd case. It is AA sectional drawing of a 2nd housing
  • the inside of the module may become hot. Therefore, a module having high reliability and durability is desired, which improves the cooling performance (i.e., improves the heat dissipation and reduces the temperature difference between cells).
  • the present inventors utilized the tab as a heat dissipation surface and enhanced the heat dissipation effect of the electrode tab portion. Specifically, the heat dissipation effect of the electrode tab portion protruded from the unit cell was enhanced, and further, a structure capable of cooling even a liquid refrigerant having a larger cooling effect was examined.
  • the module's reliability and durability are improved by the improvement of the heat dissipation and the equalization of the temperature among the unit cells. Further, the energy density per volume of the battery module and the battery pack in which the battery modules are arranged can be increased.
  • the present invention is intended for a laminate type lithium ion secondary battery module in which a plurality of laminate type lithium ion secondary batteries are stacked and integrated in a housing.
  • the housing covers the stacked battery body, and the positive electrode, the negative electrode tab, or a pair of different-polarity tabs adjacent in the stacking direction, or a tab assembly in which the same-polarity tabs are joined, from the same direction. It is comprised from the 1st housing
  • the second housing includes a tab storage chamber in which each tab or tab assembly is covered and accommodated one by one with a partition wall, and a tab connection portion, a wiring, a control circuit board of a battery assembly, and cooling A mechanism is incorporated.
  • control circuit board various wiring, terminal connection parts, and cooling mechanism are integrated in the case covering the tab part separately from the case covering the unit body of the cell and the case of the tab part.
  • the first housing and the second housing are spatially separated.
  • the surface facing the first housing of the second housing is closed by a partition plate, and the partition plate is provided with an opening for inserting the tab into the tab storage chamber.
  • the second housing having the cooling channel is made of a thermally conductive metal material, and the inner wall surface of the cooling channel be provided with an electrical insulating layer.
  • the wire storage chamber may be disposed on the back side of the tab storage chamber (opposite the surface facing the first casing), in a space between the rows of the tab storage chambers arranged in two rows in the stacking direction, or the like. Is preferred.
  • the outer surface of the tab storage chamber is preferably provided with perforations.
  • the second casing being made of a metal material with good thermal conductivity.
  • a plurality of battery modules covered by the first case may be combined to form an assembled battery integrated with the second case.
  • the second case comprises a first and a second two sets of battery modules having the first case, and a second case for storing the tab and the tab assembly.
  • the first housing is disposed on both sides of the body.
  • the second housing includes a tab storage chamber in which each tab or each tab assembly is covered and stored one by one, and provided on the partition plate surface of the both sides of the second housing.
  • a tab or tab assembly of the first and second modules is inserted into the tab storage chamber from the opening, and a second gap is formed between the tab storage chambers arranged in the stacking direction of the first module.
  • the module said tab storage room is arranged.
  • Example 1 described in FIGS. 1 to 9 is an example of a module structure 100 in which laminated batteries capable of liquid cooling are stacked.
  • FIG. 1 shows an example of the appearance of the laminate type battery 1 and how to arrange the laminate direction.
  • FIG. 2 shows a cross-sectional view in the stacking direction of the laminated battery. In each unit cell, as shown in FIG.
  • the laminate type battery 1 has an electrode part (not shown) laminated a plurality of times in the order of a positive electrode, a separator, a negative electrode, a separator and a positive electrode, and has a structure in which the periphery of the electrode part is covered with an exterior film.
  • a seal thermal fusion bonding portion 3 is formed by thermally fusing the bonding surfaces of the upper and lower outer layer films 2a and 2b, and an electrode portion (positive electrode tab 4 and negative electrode tab 5) protrudes from the seal thermal fusion bonding portion 3 .
  • a plurality of laminated single cells are connected in series.
  • the positive electrode tab 4A of the uppermost laminate type battery 1A is used for connecting the external terminal of the positive electrode.
  • the negative electrode tab 5A of the laminate type battery 1A is electrically connected to the positive electrode tab 4B of the immediately lower adjacent laminate type battery 1B.
  • the negative electrode tab 5B of the battery 1B is connected to the positive electrode tab 4C of the battery 1C below it, and the negative electrode tab 5C of the battery 1C is connected to the positive electrode of the battery 1 below it.
  • the positive electrode tab 4J is connected to the negative electrode tab of the next higher battery, and the negative electrode tab 5J of the same battery is used for external terminal connection of the negative electrode.
  • FIG. 2 shows an example in which the tab is bent in a crank shape.
  • the cranked tabs 5A and 4B are welded at the joint surface 7 to form a joint tab 8.
  • FIG. 3 shows a state where ten laminate type batteries are stacked and the battery main body portion is housed in the battery main body case (first case portion) 10.
  • the tabs ⁇ group are arranged in order of the negative electrode 5A, the positive electrode 4B, the negative electrode 5C,... The positive electrode 4J from the top.
  • the tab ⁇ group is arranged in order of the positive electrode 4A, the negative electrode 5B, the positive electrode 4C,... The negative electrode 5J from the top.
  • the connection state on the tab ⁇ group side on the front side is indicated by a solid line
  • the connection state on the tab ⁇ group side corresponding to the back is indicated by a broken line. Similar to the ⁇ group, the tabs of the ⁇ group are connected by the junction tab 9.
  • FIG. 4 shows a module 100 including twelve laminated batteries 1A to 1L stacked.
  • the main body portion 1 of the laminate type battery is housed in the first housing 10, and the bonding tab portions 8 and 9 in which the positive electrode tab and the negative electrode tab are joined are housed in the tab housing housing (second housing portion) 11. (Tab assembly 9 not shown).
  • the height H 2 of the second housing 11 is made shorter than the first housing height H 1 by adjusting the length of the gap P of the bonding tab 8 to reduce the volume of the module. , Energy density per volume can be increased.
  • the upper cushioning material 12 and the lower cushioning material 13 are respectively disposed between the first casing 10 and the upper and lower end portions of the laminated laminate type battery, and the up and down direction along with the expansion and contraction of the laminated battery An amount of deformation is absorbed, and an appropriate load is always applied to the stacked batteries, so that a gap or the like does not occur between the stacked batteries against an external impact.
  • the first and second housings 10 and 11 are joined by their respective flanges 14a and 14b and connected and fixed by screws or the like, and remain rigid against external impacts, and the battery body and tab joint surfaces Prevent the force applied to the tabs themselves.
  • FIG. 5 is a bird's-eye view of the second housing 11 and shows the surface in contact with the first housing 10.
  • the inner side surface of the flange 14 b of the housing 11 is closed by a partition plate 15.
  • the partition plate 15 is provided with an opening for housing each tab according to the position of the bonding tab of the battery main body, the positive electrode tab for the external terminal, and the negative electrode tab (a bonding tab of tab ⁇ group First joint tab storage chamber opening 16 for storing a first joint tab, second joint tab storage chamber opening 17 for a joint tab of a tab ⁇ group (referred to as second joint tab), for an external terminal
  • the vertical alignment of the first bonding tab storage chamber opening 16 and the second bonding tab storage chamber opening 17 is arranged in a form displaced by 1 / 2P. Further, storage chamber openings 18 and 19 for positive and negative electrode external terminal connection tabs are provided on the first bonding tab side.
  • FIG. 6 The AA cross section of the second housing 11 is shown in FIG. 6, and the BB cross section is similarly shown in FIG.
  • a total of six refrigerant flow passage portions 20A are formed above and below the first bonding tab storage chamber 30A.
  • a total of six refrigerant flow passage portions 20B are formed in the gap portion of the second bonding tab storage chamber 30B (not shown). The structure from another angle is shown in FIG.
  • the refrigerant flow passage portion 20A provided between the first bonding tab storage chamber 30A and the refrigerant flow passage portion 20B provided between the second bonding tab storage chamber 30B are connected by the connection flow passage 21 and the refrigerant It is possible to flow in the direction of the arrow from the inlet 22 provided on the side of the housing toward the outlet 23 provided on the opposite side.
  • the refrigerant either liquid such as water or gas such as air may be used.
  • the flow direction of the refrigerant may be either direction, but in the case of the present embodiment, considering the pressure loss, the direction opposite to that in FIG. 7 is preferable because the pressure loss is small and the pump power can be small.
  • a wiring storage room 26 is provided at a position further recessed from the openings 16 and 17.
  • the control circuit board 24, positive and negative terminal connection portions 25a and 25b, fuses, voltage detection lines, other boards, connectors and the like are stored in the wiring storage room 26.
  • the positive electrode tab 4A for the external terminal is connected to the positive electrode external terminal 27a through the positive electrode terminal connection portion 25a, and similarly, the negative electrode tab 5L for the external terminal is the negative electrode through the negative electrode terminal connection portion 25b. It is connected to the external terminal 27b.
  • An openable upper lid 28 is provided to perform operations such as wiring to a control circuit board and a fuse.
  • wiring such as power lines and thermistors, voltage detection lines, communication connectors, bus bar fittings, fuses, fuse fittings, etc. in advance for the second housing 11 so that the necessary minimum number of wiring connections can be made. May be fixed.
  • the second housing 11 is preferably made of a resinous material in consideration of electrical insulation.
  • a metal material having good thermal conductivity For example, by using an aluminum housing, it is possible to reduce the thermal resistance from the bonding tab to the above-described refrigerant flow path. As a result, the amount of heat released from the bonding tab increases, and the battery temperature can be further reduced. Further, the effect of reducing the temperature difference between the stacked batteries is further improved.
  • a thin electrically insulating layer 52 is provided on the contact surface 51 on the housing side in contact with the surface 50 of the bonding tab portions 8 and 9.
  • the area of the tab is preferably as large as possible.
  • the heat dissipation (cooling) area is increased, the cooling effect is enhanced, and as a result, the amount of heat transferred from the cell to the tab side is increased.
  • the amount of heat transfer in the stacking direction is reduced, and the temperature difference between the cells can be reduced.
  • the laminate type battery is a substantially flat rectangular parallelepiped as shown in FIG. 1 and the like, and as a means for increasing the tab area, as shown in FIG. 9A, the long side of the laminate type battery is positive. / Both negative electrode tabs can be provided, or can be provided on the short side as shown in FIG.
  • the positive electrode and the negative electrode tab on one side of the long side shown in FIG.
  • the tab areas of the positive and negative electrodes are the same, and the distance Y between the tabs and the distance Z from the end are also equal, comparing the areas A1 and A2 surrounded by the broken line in the figure, which increase by the tabs, Although the degree of influence is different depending on the ratio of the long side L and the short side W, the area A2 when the tab is provided on the short side is larger than the area A1 when the tab is provided on the long side
  • A1 Tab area / (1- (2Z + Y) / L)
  • A2 tab area / (1- (2Z + Y) / W) Since L> W, A2> A1.
  • the tab may be provided on the short side.
  • FIG. 10 is a bird's-eye view showing the second housing 200 in the second embodiment.
  • the configuration of the surface on the side in contact with the first housing is the same as in FIG. 5 of the first embodiment, and the inner side surface of the flange of the housing is closed by the partition plate 15.
  • the wire storage chamber 26 is provided on the back side of each of the tab storage chambers 30A, 30B, 31, 32.
  • the wiring storage room 26 also serves as a partition with the outside air.
  • only the joint tab storage chamber is provided in the housing, and there is no separate refrigerant flow channel portion as in the first embodiment, but the flow channel of the refrigerant is formed by the wiring storage chamber 26 and the tab storage chamber. 29 are formed.
  • it is suitable for flowing a refrigerant such as air in the direction of arrow 201 in FIG.
  • the wiring storage chamber 26 may be provided at the top or bottom of the bonding tab storage chamber. In that case, it is preferable to arrange a member for forming a flow path, such as a dividing flat plate, at the position of the broken line in FIG.
  • the second case since it is not necessary to newly manufacture the refrigerant flow channel, the second case can be manufactured easier than the first embodiment.
  • FIG. 11 is a bird's-eye view showing a second housing 300 in the third embodiment.
  • the configuration of the surface in contact with the first housing of the second housing of the third embodiment is the same as that of FIG. 5 of the first embodiment, and the inner side surface of the flange of the housing is closed by the partition plate 15 ing.
  • each storage chamber opening part 16, 17, 18, 19 for accommodating those each tab according to the position of the joining tab of a battery main body, the positive electrode tab for external terminals, and the same negative electrode tab is provided, respectively There is.
  • bonding tab storage chambers 31 and 32, a first bonded body storage chamber 30A, and a second bonded body storage chamber 30B are provided as housings, and bonding is performed.
  • the tab storage chambers 30A, 30B and the tab storage chambers 31, 32 are formed of a wall material having perforations, and have perforations 301 on the outer surface.
  • the perforations 301 are illustrated only on the upper surface of each storage chamber, they are also provided on the lower surface and the side surface.
  • the wire storage chamber 26 is provided between the bonded body storage chambers 30A and 30B.
  • the wiring storage room 26 By arranging the wiring storage room 26 in the gap between the first bonding tab storage room 30A and the second bonding tab storage room 30B, the useless space part is reduced, the mounting density is increased, and the energy per module unit volume is increased. It leads to the improvement of density.
  • the tab storage room and the wiring storage room be integrally formed and made of aluminum.
  • the wiring storage chamber 26 can also contribute as a heat dissipation surface, and by increasing the heat transfer area, natural convection heat transfer is promoted and the heat dissipation characteristics are improved.
  • a thin electrical insulating layer 52 may be provided on the contact surface 51 on the housing side in contact with the surface 50 of the bonding tab. It is necessary to take measures in consideration of the electrical insulation between the junction tab and the housing.
  • FIG. 12 is a view showing the assembled battery 400 in which the stacked battery modules 401 and 402 are integrated with the second housing 42 interposed therebetween.
  • the laminated battery main body is housed inside the first casings 40 and 41 of the respective battery modules.
  • the second case 42 corresponds to a modification of the second case of the first to third embodiments.
  • First and second joint tabs 8 and 9 project from the respective modules 401 and 402 in the same manner as in the above embodiment, and are accommodated in the second housing 42.
  • the second housing 42 is a connector unit that connects two modules.
  • FIG. 13 shows a cross section AA (stacking direction) of the second housing 42 of FIG. 12
  • FIG. 14 shows a cross section BB (direction orthogonal to the stacking direction) of the second housing 42 of FIG. is there.
  • control circuit board in some cases including control of two modules with one circuit board
  • communication in the space portion 45 between the two bonding tab storage chamber rows arranged along the stacking direction Connectors and other parts are placed together.
  • the volume of the battery pack can be reduced as compared with the case where the battery pack is constructed with a single module. Therefore, the energy density per unit volume of the battery pack can be increased.
  • the present invention is not limited to such an arrangement, and two or more modules may be used as one second housing. It is possible to integrate. As a result, the assemblability is improved by the integration of the wiring storage room and the like. In addition, the omission of the tab storage case enables weight reduction of the assembled battery.
  • a tab storage case 500 in which the positive electrode tab and the negative electrode tab are joined by a tab storage case will be described with reference to FIGS.
  • the positive electrode tab and the negative electrode tab of the unit cells adjacent to each other between the stacked unit cells are joined in advance.
  • the tabs protruding from the first case are not joined, and the positive electrode tab 4A of the laminate type battery 1A, the negative electrode tab 5B of the laminate type battery 1B, and the laminate type battery
  • the positive electrode tabs 4C of 1C and the positive electrode tabs and the negative electrode tabs are alternately arranged in the stacking direction.
  • a battery module is configured by combining the tab storage case 11 for storing the projected tabs and the battery body case 10.
  • a positive electrode external terminal 27a, a negative electrode external terminal 27b, and a communication connector 27c are provided on the back of the tab housing case 11.
  • a bus bar is attached to the positive electrode external terminal 27a and the negative electrode external terminal 27b.
  • the AA cross section of the tab housing case 11 is shown in FIG.
  • the positive electrode tab 4A of the uppermost cell 1A of FIG. 15 is inserted and stored in the tab storage chamber 31 from the opening 18 of FIG.
  • An opening 51 is provided on the back side of the tab storage chamber 31 in order to connect the positive electrode tab 4A to the substrate, the connector, and the terminal connection portion 25a provided in the wiring storage chamber 26 for connecting the external terminal of the positive electrode.
  • flat plates 53a, 53b of good electrical conductivity such as copper are fixed.
  • the flat plates 53 a and 53 b are connected in advance to the terminal connection portion 25 a through the opening 51.
  • the negative electrode tab 5B of the unit cell 1B one step lower than the unit cell 1A is stored in the tab storage chamber 60
  • the positive electrode tab 4C of the unit cell 1C one lower is stored in the tab storage chamber 61.
  • flat plates 54a, 55a, 56a, and 57a of good electrical conductivity are fixed to the upper and lower surfaces of the inner walls of the tab storage chambers 60 and 61, respectively.
  • a conductive plate 58a electrically connected to the flat plates 54a, 55a, 56a, 57a is embedded in the housing in advance.
  • the flat plates 54a, 55a, 56a, 57a and the conductive plate 58a may be integrated.
  • the next pair of negative electrode tabs 5D and positive electrode tabs 4E are stored in the tab storage chambers 62, 63 provided with the flat plates 54b, 55b, 56b, 57b and the conductive plate 58b, respectively.
  • Each inserted tab makes good contact with the well-conductive flat plate provided in the tab storage chamber, thereby completing serial connection wiring between the unit cells in the laminated battery.
  • each of the tabs protruding from the battery main body housing 10 is inserted into the respective tab storage chambers provided in the tab storage housing 11 to thereby store the housing 11 and the battery main body. Integrate with the body 10 to complete the module assembly.
  • a cooling flow passage 20A is provided between the tab storage chambers, and is connected to the refrigerant inflow portion 22 provided on the side surface of the housing 11 shown in FIG. Cooling performance can be further improved by flowing the refrigerant between the tabs.
  • FIG. 17 is an enlarged view of the tab storage chamber 60 shown in FIG. 16 and shows an example of a structure for improving the contact between the tab and the good electric conductive flat plate in the tab storage chamber.
  • good electric conductive flat plates 54a and 55a are embedded respectively.
  • the flat portions 54a and 55a are respectively provided with hollow portions 64 and 65 inside, so that bulging portions 66 and 67 are formed.
  • the gap between the bulging portions is set to be smaller than the thickness of the tab 5B. Therefore, when the tab 5B is inserted, the portions 68 and 69 where the tab 5B and the flat bulging portions 66 and 67 contact with each other.
  • a bonding method or a physical bonding mechanism which does not require welding or soldering may be used.
  • the joining operation of the positive and negative electrode tabs is not necessary, and the positiveness of the assembling operation is dramatically improved.
  • the heat dissipation effect of the electrode tab portion can be enhanced, and further, the liquid refrigerant having a large cooling effect can be used for cooling.
  • the high temperature durability and the battery life are improved because of the reduction.
  • the energy density per volume of the battery pack which arranged the battery module and the battery module can be raised.

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

Abstract

Selon la présente invention, dans un module de batterie, une pluralité de batteries rechargeable au lithium-ion de type plaque ou de type stratifié sont empilées et intégrées dans un châssis. Le module de batterie comprend : un premier châssis qui recouvre une partie de corps principal de batteries empilées et permettant seulement à des languettes d'électrode positive et négative et/ou des corps d'assemblage de languettes d'être projetés dans la même direction vers l'extérieur du châssis, lesdits corps d'assemblage de languettes étant formés par assemblage d'une série de languettes d'électrode différentes adjacentes dans la direction d'empilement et par assemblage d'une série de mêmes languettes d'électrode adjacentes dans la direction d'empilement ; et un second châssis destiné à recevoir les languettes et les corps d'assemblage de languettes. Le second châssis comprend des chambres de réception de languettes dans lesquelles les languettes ou les corps d'assemblage de languettes sont reçus une par une ou un par un tout en étant recouverts avec une séparation. Le second châssis comporte également une partie de connexion de languette, un câblage, une carte de circuit imprimé de commande de batterie assemblée et un mécanisme de refroidissement.
PCT/JP2013/064831 2013-05-29 2013-05-29 Module de batterie rechargeable au lithium-ion de type stratifié WO2014192087A1 (fr)

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WO2017110433A1 (fr) * 2015-12-24 2017-06-29 株式会社オートネットワーク技術研究所 Module de connexion
JP6472857B1 (ja) * 2017-10-03 2019-02-20 カルソニックカンセイ株式会社 組電池
DE102017215982A1 (de) * 2017-09-11 2019-03-14 Mahle International Gmbh Batteriezellenanordnung
DE102017215980A1 (de) * 2017-09-11 2019-03-14 Mahle International Gmbh Batteriezellenanordnung
CN111384464A (zh) * 2018-12-29 2020-07-07 宁德时代新能源科技股份有限公司 电池模组以及电池包
GB2589564A (en) * 2019-11-26 2021-06-09 Bae Systems Plc Containment structure for a battery
CN113328146A (zh) * 2021-06-15 2021-08-31 多氟多新能源科技有限公司 一种软包锂离子电池pack堆叠的方法
CN113363673A (zh) * 2021-06-28 2021-09-07 东莞新能安科技有限公司 电池模组及应用其的电子装置
CN113474935A (zh) * 2019-03-01 2021-10-01 京瓷株式会社 电化学电池模块
CN114039173A (zh) * 2021-10-25 2022-02-11 东莞新能安科技有限公司 电化学装置、电池模组及用电设备
WO2023185218A1 (fr) * 2022-03-26 2023-10-05 珠海冠宇电池股份有限公司 Batterie
CN117458071A (zh) * 2023-11-07 2024-01-26 湖南沃尔顿新能源科技有限公司 一种方便拆卸的高密度锂离子电池结构

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WO2017110433A1 (fr) * 2015-12-24 2017-06-29 株式会社オートネットワーク技術研究所 Module de connexion
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JP2019067673A (ja) * 2017-10-03 2019-04-25 カルソニックカンセイ株式会社 組電池
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CN111384464A (zh) * 2018-12-29 2020-07-07 宁德时代新能源科技股份有限公司 电池模组以及电池包
CN113474935A (zh) * 2019-03-01 2021-10-01 京瓷株式会社 电化学电池模块
CN113474935B (zh) * 2019-03-01 2024-05-03 京瓷株式会社 电化学电池模块
GB2589564A (en) * 2019-11-26 2021-06-09 Bae Systems Plc Containment structure for a battery
CN113328146A (zh) * 2021-06-15 2021-08-31 多氟多新能源科技有限公司 一种软包锂离子电池pack堆叠的方法
CN113363673A (zh) * 2021-06-28 2021-09-07 东莞新能安科技有限公司 电池模组及应用其的电子装置
CN113363673B (zh) * 2021-06-28 2024-03-12 东莞新能安科技有限公司 电池模组及应用其的电子装置
CN114039173A (zh) * 2021-10-25 2022-02-11 东莞新能安科技有限公司 电化学装置、电池模组及用电设备
WO2023185218A1 (fr) * 2022-03-26 2023-10-05 珠海冠宇电池股份有限公司 Batterie
CN117458071A (zh) * 2023-11-07 2024-01-26 湖南沃尔顿新能源科技有限公司 一种方便拆卸的高密度锂离子电池结构
CN117458071B (zh) * 2023-11-07 2024-04-30 湖南沃尔顿新能源科技有限公司 一种方便拆卸的高密度锂离子电池结构

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