WO2011033722A1 - 電池モジュール及びその製造方法並びに温度調整システム - Google Patents
電池モジュール及びその製造方法並びに温度調整システム Download PDFInfo
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- WO2011033722A1 WO2011033722A1 PCT/JP2010/005133 JP2010005133W WO2011033722A1 WO 2011033722 A1 WO2011033722 A1 WO 2011033722A1 JP 2010005133 W JP2010005133 W JP 2010005133W WO 2011033722 A1 WO2011033722 A1 WO 2011033722A1
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- battery module
- temperature adjustment
- side wall
- holding
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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
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
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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
- H01M10/63—Control systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
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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
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/643—Cylindrical cells
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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
- H01M10/65—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
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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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
- H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
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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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/116—Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
- H01M50/117—Inorganic material
- H01M50/119—Metals
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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
- 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
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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
- 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
- H01M50/213—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
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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
- 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
- H01M50/227—Organic material
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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
- 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
- H01M50/271—Lids or covers for the racks or secondary casings
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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
- 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
- H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
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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
- 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
- H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
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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
- 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
- H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
- H01M50/524—Organic material
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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
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/30—Preventing polarity reversal
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a battery module, a manufacturing method thereof, and a temperature adjustment system.
- secondary batteries that can be used repeatedly have been used as power sources for driving portable electronic devices or mobile communication devices from the viewpoint of resource saving or energy saving. Further, from the viewpoint of reducing the amount of fossil fuel used or the amount of carbon dioxide emitted, the use of such a secondary battery as a power source for driving a vehicle or the like has been studied.
- the battery module can be reduced in size and weight by improving the performance of the battery (unit cell) constituting the battery module. Therefore, it is possible to obtain merits such as improvement in workability when combining battery modules and improvement in freedom when mounting in a limited space such as a vehicle.
- Patent Documents 1-3 the performance and life of the battery depend on the environmental temperature. Therefore, when the temperature of the unit cell varies in the battery module, the performance and life of the unit cell in the battery module vary. Therefore, it has been proposed to adjust the temperature of the unit cells constituting the battery module using the temperature adjustment unit (Patent Documents 1-3).
- the unit cells are held in close contact with the temperature adjustment unit, and the liquid (the unit cell temperature is adjusted) outside the unit cells in close contact with the temperature adjustment unit. Liquid).
- the temperature adjustment unit may be made of resin.
- a holding part unit cell is held in close contact with the holding part
- a flow path the liquid flows in the flow path
- a method of bringing the holding part and the channel into close contact with each other can be considered.
- the adhesive strength between the holding portion and the flow path is not sufficient, there is a problem that the holding portion and the flow path are separated from each other due to impact or the like. Therefore, it is preferable to integrally mold the holding portion and the flow path.
- blow molding methods and injection molding methods are known as methods for integrally molding resin molded products.
- the blow molding method is suitable for molding a resin molded product having a hollow portion.
- a resin material having a hollow portion is melted, and air is supplied to the hollow portion of the molten resin material while the molten resin material is sandwiched between molds. Therefore, it becomes difficult to mold the resin molded product as the depth of the hollow portion of the resin molded product in the direction perpendicular to the air supply direction becomes deeper.
- the injection molding method molten resin is injected into a mold. Therefore, the injection molding method is suitable for molding a resin molded product having a complicated shape.
- the present inventors have completed the present invention based on the respective features of the injection molding method and the blow molding method.
- the battery module according to the present invention includes, for example, the following temperature adjustment unit.
- the temperature adjusting unit according to the present invention is formed of a resin molded body in which a first flat portion, a second flat portion, and a side wall portion are integrally formed, and is divided into a holding portion and a flow path by the side wall portion. Yes. The unit cells are held in close contact with the holding portions defined by the side wall portions.
- This temperature adjustment unit may be molded by an injection molding method or a blow molding method.
- adjusting the temperature means raising or lowering the temperature.
- first plane portion and the “second plane portion” include cases where the surface is not flat.
- the respective surfaces of the “first plane part” and the “second plane part” may be curved or uneven.
- the unit cell is held in close contact with the holding unit means that the unit cell is in close contact with the side wall part that defines the holding unit and is held in the holding unit. For example, the unit cell is press-fitted into the holding unit. It is to be done.
- temperature variations of the unit cells in the battery module can be reduced.
- FIG. 1 is an exploded perspective view of the battery module according to Embodiment 1 of the present invention.
- FIG. 2 is a longitudinal sectional view of the unit cell according to Embodiment 1 of the present invention.
- FIG. 3 is an exploded perspective view of the battery pack according to Embodiment 1 of the present invention.
- 4A is an enlarged view of the IVA region shown in FIG. 3
- FIG. 4B is an enlarged view of the IVB region shown in FIG.
- FIG. 5 is a plan view of the negative electrode connection plate, the insulating plate, and the positive electrode connection plate that constitute the assembled battery according to Embodiment 1 of the present invention.
- 6 is a cross-sectional view taken along line VI-VI shown in FIG.
- FIG. 7 is a cross-sectional view taken along the line VII-VII shown in FIG.
- FIG. 8A is a perspective view of the temperature adjustment unit according to Embodiment 1 of the present invention
- FIG. 8B is a plan view thereof.
- 9A is a cross-sectional view taken along line IXA-IXA shown in FIG. 8
- FIG. 9B is a cross-sectional view taken along line IXB-IXB shown in FIG.
- 10A is a cross-sectional view taken along line XA-XA shown in FIG. 8
- FIG. 10B is a cross-sectional view taken along line XB-XB shown in FIG.
- FIG. 11A is a cross-sectional view showing a state where the unit cell is held in close contact with the structure shown in FIG. 9A and liquid is supplied
- FIG. 11B is shown in FIG. 9B.
- FIG. 12A is a cross-sectional view showing a state where the unit cell is held in close contact with the structure shown in FIG. 10A and liquid is supplied
- FIG. 12B is a view shown in FIG. It is sectional drawing which shows the state by which the liquid was supplied to the structure.
- FIG. 13 is a block diagram of the temperature adjustment system in Embodiment 1 of the present invention.
- FIG. 13 is a block diagram of the temperature adjustment system in Embodiment 1 of the present invention.
- FIG. 14 is a flowchart showing a method for manufacturing the battery module according to Embodiment 1 of the present invention.
- FIG. 15 is a cross-sectional view showing a state in which the unit cell is held in close contact with the temperature adjustment unit in the first modification of the first embodiment of the present invention.
- FIG. 16 is a cross-sectional view showing a state in which the unit cell is held in close contact with the temperature adjustment unit in the second modification of the first embodiment of the present invention.
- FIG. 17A is a perspective view of a temperature adjustment unit according to Embodiment 2 of the present invention, and FIG. 17B is a plan view thereof.
- 18 is a cross-sectional view taken along line XVIII-XVIII shown in FIG. FIG.
- FIG. 19 is a cross-sectional view showing a state where the unit cell is held in close contact with the structure shown in FIG. 18 and liquid is supplied.
- FIG. 20 is a flowchart showing a method for manufacturing a battery module according to Embodiment 2 of the present invention.
- FIG. 21 is a perspective view of a temperature adjustment unit according to Embodiment 3 of the present invention. 22 is a cross-sectional view taken along line XXII-XXII shown in FIG.
- FIG. 23 is a cross-sectional view showing a state where the unit cell is held in close contact with the structure shown in FIG. 22 and liquid is supplied.
- FIG. 24 is a block diagram of a temperature adjustment system in Embodiment 3 of the present invention.
- FIG. 25 is an exploded perspective view showing another configuration of the assembled battery.
- FIG. 1 is an exploded perspective view of the battery module 1 according to the first embodiment.
- the temperature adjusting unit 5 and the assembled battery assembly 7 are accommodated in the accommodating portion 3a of the resin case 3.
- the upper surface of the housing portion 3a is closed with a metal (for example, aluminum) lid 9, and the front surface of the housing portion 3a is closed with a resin front panel 11.
- the assembled battery assembly 7 includes seven assembled batteries 43, 43,... Connected in series with each other, and each assembled battery 43 includes 20 unit cells 21, 21,. Connected and configured.
- the direction in which the unit cells 21, 21,... Are connected in parallel to each other is referred to as “parallel direction V1”, and the direction in which the assembled batteries 43, 43,. .
- a positive electrode connection plate 57 constituting the assembled battery 43 is connected to the positive electrode terminal 13 of the assembled battery assembly 7, and this positive electrode terminal 13 is for external connection provided on the front panel 11.
- the positive terminal 17 is connected.
- a negative electrode connection plate 45 (see FIG. 3) constituting the assembled battery 43 is connected to the negative electrode terminal 15 of the assembled battery assembly 7.
- the negative electrode terminal 15 is provided for external connection provided on the front panel 11.
- the negative electrode terminal 19 is connected.
- the unit cells 21, 21, etc. constituting the battery assembly 7 are held in close contact with the temperature adjustment unit 5.
- the temperature of the unit cells 21, 21,... Is adjusted by flowing a liquid (for example, water) outside the unit cells 21, 21,.
- the liquid is supplied to the flow path 85 (see FIGS. 9A and 9B) of the temperature adjustment unit 5 through the first pipe 91 and passes through the second pipe 93. Discharged from.
- the first tube 91 is inserted through a first through hole 11 a formed in the front panel 11, and the second tube 93 is inserted through a second through hole 11 b formed in the front panel 11.
- Such a battery module 1 is mounted on, for example, an electric vehicle (a vehicle that supplies all or part of the energy necessary for driving the vehicle with electric energy), and travels and accelerates the electric vehicle, and an air conditioning apparatus mounted on the electric vehicle And electric energy required for the operation of the pump 103 (see FIG. 13) used for circulating the liquid in the temperature control system 101 is supplied.
- an electric vehicle a vehicle that supplies all or part of the energy necessary for driving the vehicle with electric energy
- an air conditioning apparatus mounted on the electric vehicle
- electric energy required for the operation of the pump 103 (see FIG. 13) used for circulating the liquid in the temperature control system 101 is supplied.
- the assembled battery assembly 7 in this embodiment is configured by connecting seven assembled batteries 43, 43,... In series, and each assembled battery 43 includes 20 unit cells 21, Are connected in parallel to each other. Therefore, unlike the case where a plurality of unit cells are connected in series with each other to form an assembly of assembled cells, even if some of the unit cells 21, 21,.
- the assembled battery assembly 7 can be charged and discharged using the batteries 21, 21,.
- each configuration of the assembled battery 43 and the assembled battery assembly 7 will be described.
- FIG. 2 is a vertical cross-sectional view of the unit cell 21 in the present embodiment.
- the unit cell 21 in the present embodiment is a secondary battery such as a lithium ion secondary battery, and has a cylindrical shape.
- a positive electrode 25, a negative electrode 27, a porous insulating layer 29, and an electrolyte (not shown) are provided in the battery case 23 .
- the positive electrode 25 and the negative electrode 27 are wound through a porous insulating layer 29, and the electrode group formed in this way is sandwiched between an upper insulating plate 31 and a lower insulating plate 33.
- the positive electrode 25 is connected to a sealing plate 37 via a positive electrode lead 35, and the sealing plate 37 is caulked to the opening 23 a of the battery case 23 via a resin gasket 39.
- the negative electrode 27 is connected to the bottom surface of the battery case 23 via the negative electrode lead 41.
- an insulating film is not provided on the outer surface of the battery case 23. Therefore, in the unit cell 21, the outer side surface 22 and the upper surface 24 of the battery case 23 can be used as negative electrode terminals.
- FIG. 3 is an exploded perspective view of the assembled battery 43 in the present embodiment
- FIGS. 4A and 4B are enlarged views of the IVA region and the IVB region shown in FIG. 3, respectively.
- FIG. 5 is a plan view of each of the negative electrode connection plate 45, the insulating plate 55, and the positive electrode connection plate 57 constituting the assembled battery 43.
- 6 is a cross-sectional view taken along the line VI-VI shown in FIG. 1
- FIG. 7 is a cross-sectional view taken along the line VII-VII shown in FIG.
- FIG. 6 shows a cross-sectional view when the two unit cells 21 and 21 are connected in parallel
- FIG. 7 shows a cross-sectional view when the assembled battery 43A and the assembled battery 43B are connected in series. Is shown.
- “number + A” is attached to the component of the assembled battery 43A (left assembled battery)
- “number + B” is attached to the component of the assembled battery 43B (right assembled battery).
- the components of the assembled battery arranged on the right side of the assembled battery 43B are denoted by “number + C”.
- each assembled battery 43 in this embodiment the negative terminals (the outer surface 22 and the upper surface 24 of the battery case 23) of the unit cells 21, 21,... Are electrically connected to each other via the negative electrode connection plate 45.
- the positive terminals (sealing plates 37) of the batteries 21, 21,... are electrically connected to each other via the positive connection plate 57 and the 20 positive connection pieces 61, 61,.
- the negative electrode connection plate (negative electrode bus bar) 45 is a nickel plate having a thickness of 0.2 mm, for example, and is provided on the sealing plates 37, 37,... Of the unit cells 21, 21,. .
- the negative electrode connection plate 45 extends in the parallel direction V ⁇ b> 1 and has a stepped portion 47.
- the first connection plate 49 and the second connection plate 51 are on different planes.
- the first connection plate 49 is connected to the upper surfaces 24, 24, ... of the battery cases 23, 23, ... of the unit cells 21, 21, ... constituting the assembled battery 43.
- 20 through holes 49a, 49a,... are formed at intervals, and the sealing plate 37 of the unit cell 21 is exposed from each through hole 49a. (See FIG. 6). Thereby, contact with the sealing plate 37 of each unit cell 21 and the negative electrode connection plate 45 can be avoided.
- Each negative electrode connection piece 53 is connected to one end of the first connection plate 49 in the short direction, and is welded to the outer surface 22 of the battery case 23 of the unit cell 21 (see FIG. 7). In this way, the negative terminals of the unit cells 21, 21,... Constituting the assembled battery 43 are electrically connected to each other via the negative connection pieces 53, 53,.
- the positive electrode connection plate (positive electrode bus bar) 57 is a copper plate having a thickness of 1 mm, for example, and is provided on the first connection plate 49 via the insulating plate 55.
- 20 through holes 55a, 55a,... And 20 through holes 57a, 57a,. 55a and each through-hole 57a are connected to the through-hole 49a (refer FIG. 6). Thereby, the upper surface of the sealing plate 37 is exposed.
- Such a positive electrode connection plate 57 is connected to the sealing plate 37 of the unit cell 21 constituting the assembled battery 43 via each positive electrode connection piece 61 (see FIG. 6).
- Each positive electrode connection piece 61 is a nickel plate having a thickness of 0.2 mm, for example, and has a stepped portion 63. Thereby, in each positive electrode connection piece 61, the 1st connection piece 65 and the 2nd connection piece 67 exist on a different plane.
- Each first connection piece 65 is connected to the upper surface of the sealing plate 37 of the unit cell 21 constituting the assembled battery 43, and each second connection piece 67 is connected to the upper surface of the positive electrode connection plate 57 (see FIG. 6). In this way, the positive terminals of the unit cells 21, 21,... Constituting each assembled battery 43 are electrically connected to each other via the positive connection pieces 61, 61,.
- a connecting portion 59 is provided at one end of the positive electrode connecting plate 57 in the short direction.
- the connecting portion 59 is connected to the through hole 49a, 49a, ..., the through hole 55a, 55a, ... and the center line L1 connecting the centers of the through holes 57a, 57a, ... with the negative electrode connecting plate 45. It exists on the side opposite to the second connection plate 51.
- the positive electrode connection plate 57 is a copper plate having a thickness of 1 mm, it may be a substrate having a pattern opening on the surface.
- the assembled battery assembly 7 in the present embodiment is such that such assembled batteries 43, 43,... Are connected in series.
- the second connection plate 51 of the negative electrode connection plate 45 and the connection portion 59 of the positive electrode connection plate 57 are on opposite sides of the center line L1.
- the first connection plate 49 and the second connection plate 51 exist on different planes. Therefore, as shown in FIG. 7, if the second connection plate 51B of the negative electrode connection plate 45B of the assembled battery 43B is disposed on the connection portion 59A of the positive electrode connection plate 57A of the assembled battery 43A, the assembled battery 43A and the assembled battery 43B are disposed. Are connected in series with each other. In this way, the assembled battery assembly 7 in the present embodiment is produced. Therefore, in the assembled battery assembly 7 in the present embodiment, the assembled batteries 43, 43,... Can be connected in series with each other without using leads or the like.
- the negative electrode plate 69 is a nickel plate having a thickness of 0.2 mm, for example.
- FIG. 8A is a perspective view of the temperature adjustment unit 5 in the present embodiment
- FIG. 8B is a plan view thereof.
- FIGS. 9A to 10B are cross-sectional views taken along lines IXA-IXA, IXB-IXB, XA-XA, and XB-XB shown in FIG. 8B, respectively.
- 11 (a) to 12 (b) show the structure shown in FIGS. 9 (a) to 10 (b), in which each unit cell 21 is held in close contact with the holding portion 81, and the liquid flows into the channel 85. It is sectional drawing which shows the state supplied.
- 11 (a) to 12 (b) show side views of the unit cells 21, 21,...
- the temperature adjusting unit 5 in this embodiment includes a unit main body 71 and a lid 87.
- the unit main body 71 is made of polypropylene, for example, and is molded by an injection molding method. Paying attention to the series direction V2, the unit main body 71 has as a repeating unit a resin molded body 79 formed by connecting the first flat surface portion 73, the side wall portion 77, the second flat surface portion 75, and the side wall portion 77 in this order. It is formed continuously.
- the first plane portion 73 constitutes the upper surface of the unit main body 71.
- the first flat portions 73, 73,... Constituting the resin molded bodies 79, 79,... Are connected to each other at both ends in the parallel direction V1, and thus the unit main body 71 has one first flat portion 73. Is present.
- the second plane portion 75 is located on the opposite side of the first plane portion 73 and constitutes the lower surface of the unit body 71.
- the second plane portions 75, 75,... Constituting the resin molded bodies 79, 79,... Are not connected to each other, and therefore, the unit body 71 has seven second plane portions 75, 75,. Existing.
- An assembled battery 43 is provided on each second flat portion 75.
- the side wall 77 extends in the thickness direction of the unit main body 71 and is connected to the first flat portion 73 and the second flat portion 75.
- the two side wall portions 77 and 77 constituting each resin molded body 79 are connected to each other at both ends in the parallel direction V1.
- the temperature adjusting unit 5 is provided with holding portions 81, 81,.
- the unit cells 21 are held in close contact with each holding portion 81, and a liquid (sometimes simply referred to as “liquid”) for adjusting the temperature of the unit cells 21, 21,.
- Each holding portion 81 is defined by the second flat surface portion 75 and the two side wall portions 77 and 77, and the flow path 85 includes the first flat surface portion 73, the two side wall portions 77 and 77, and the lid body 87. It is prescribed by.
- the lid 87 is fixed to the second flat surface 75 side of the unit main body 71.
- the holding portion 81S is defined by the second flat surface portion 75S, the side wall portion 77S (1), and the side wall portion 77S (2).
- the side wall 77S (1) forms a flow path 85 with the first flat surface portion 73S, the side wall portion 77R (2), and the lid 87
- the side wall portion 77S (2) is the first flat surface portion 73T.
- the side wall 77T (1) and the lid 87 constitute a flow path 85. Therefore, the unit cell 21S is in close contact with each of the side wall 77S (1) and the side wall 77S (2), and separates the side wall 77S (1) and the side wall 77S (2) from the liquid. Held in position.
- the case where each unit cell 21 is in close contact with the two side wall portions 77 and 77 defining the holding unit 81 is referred to as “the unit cell 21 is in close contact with the holding unit 81”. There is.
- each unit cell 21 is in close contact with each of the two side wall portions 77 and 77 that define the holding portion 81, and is held at a position that separates each of the two side wall portions 77 and 77 with respect to the liquid. The Therefore, heat energy can be exchanged between all the cells 21, 21,... Constituting the battery assembly 7 and the liquid in the flow path 85.
- maintenance part 81, the flow path 85, and the cover body 87 is further shown.
- the holding portions 81, 81,... are provided at intervals in the parallel direction V1 and the series direction V2.
- the holding portions 81, 81 adjacent to each other in the series direction V ⁇ b> 2 exist with the first plane portion 73 therebetween.
- the holding parts 81, 81 adjacent to each other in the parallel direction V ⁇ b> 1 are communicated with each other by a communication part 83. If the holding portions 81, 81,... Communicate with each other in the parallel direction V1, the interval between the holding portions 81, 81 in the parallel direction V1 can be reduced. Therefore, the interval between the unit cells 21 and 21 in the assembled battery 43 can be set to about 1 mm, for example. Further, if the holding portions 81, 81,...
- the unit main body 71 is provided with one flow path 85.
- a first pipe 91 and a second pipe 93 are communicated with the flow path 85.
- the first pipe 91 is a supply pipe (supply section)
- the second pipe 93 is a discharge pipe (discharge section).
- the lid 87 is made of polypropylene, for example.
- the peripheral edge of the covering surface (surface located on the second flat surface 75 side of the unit main body 71) 88 of the lid 87 is laser welded or thermocompression bonded to the peripheral edge of the unit main body 71 on the second flat surface portion 75 side.
- ribs 89, 89,... Extend in the parallel direction V1 on the covering surface 88 of the lid 87, and each rib 89 is sandwiched between holding portions 81, 81 that are adjacent to each other in the series direction V2.
- the temperature adjustment system 101 shown in FIG. FIG. 13 is a block diagram of the temperature adjustment system 101 in the present embodiment.
- the temperature adjustment system 101 in the present embodiment includes the temperature adjustment unit 5 in the present embodiment, a pump 103, and a heat exchanger 105.
- the liquid circulates in the temperature adjustment system 101. Specifically, the liquid is supplied from the heat exchanger 105 through the first pipe 91 into the flow path 85 and is discharged from the flow path 85 through the second pipe 93 to exchange heat. Return to vessel 105. In the heat exchanger 105, the liquid is cooled when each unit cell 21 is cooled, and is warmed when each unit cell 21 is heated.
- FIG. 14 is a flowchart showing a method for manufacturing the battery module 1 according to this embodiment.
- step S101 the unit main body 71 is produced by, for example, an injection molding method (step (a)).
- step S102 the unit main body 71 and the lid 87 are laser welded or thermocompression bonded (step (b)). Specifically, first, the second flat surface portion 75 side of the unit main body 71 and the covering surface 88 of the lid body 87 are opposed to each other, and then the ribs 89 of the lid body 87 are adjacent to each other in the series direction V2. 81, 81. Thereafter, the peripheral edge of the cover surface 88 of the lid 87 and the peripheral edge of the unit main body 71 on the second flat portion 75 side are laser welded or thermocompression bonded.
- step S103 the unit cells 21, 21,... Are connected in parallel with each other to produce the assembled battery 43 (step (c)).
- the temperature adjusting unit 5 is accommodated in the accommodating portion 3 a of the case 3.
- the assembled battery 43 is inserted into the temperature adjustment unit 5 in step S104.
- each of the unit cells 21, 21... Constituting the assembled battery 43 is press-fitted into the holding portion 81 of the temperature adjustment unit 5.
- the unit cells 21, 21,... Constituting the assembled battery 43 are held in close contact with the holding portions 81, 81,. (Step (d)).
- step S105 the assembled batteries 43, 43,... Are connected in series to produce the assembled battery assembly 7 (step (c)).
- the positive electrode terminal 13 is connected to the positive electrode connection plate 57 of the assembled battery assembly 7 and the negative electrode terminal 15 is connected to the negative electrode connection plate 45 of the assembled battery assembly 7.
- the front surface of the housing 3 a of the case 3 is covered with the front panel 11.
- the positive terminal 13 is connected to the positive terminal 17 for external connection provided on the front panel 11
- the negative terminal 15 is connected to the negative terminal 19 for external connection provided on the front panel 11.
- the top surface of the housing 3 a of the case 3 is covered with a lid 9.
- each unit cell 21 is in close contact with each of the two side wall portions 77 and 77 that define the holding portion 81, and the two side walls with respect to the liquid.
- the portions 77 and 77 are held at positions separated from each other. Therefore, heat energy can be exchanged between all the cells 21, 21,... Constituting the battery assembly 7 and the liquid. Therefore, the temperature variation of the unit cells 21, 21,... In the battery module 1 can be suppressed to about 3 ° C., for example. As a result, it is possible to reduce the variation in the life of the unit cells 21, 21,... In the battery module 1, and thus it is possible to provide the battery module 1 having excellent performance.
- each unit cell 21 is held in close contact with the holding portion 81. Therefore, even if the battery module 1 according to the present embodiment vibrates, it is possible to prevent the unit cells 21, 21,. Therefore, for example, the battery module 1 according to the present embodiment can be directly attached to the vehicle body of the electric vehicle without using a vibration blocking floating. Thereby, the battery module 1 can be arrange
- the temperature adjustment unit 5 in the present embodiment heat energy can be exchanged between each unit cell 21 and the liquid. Therefore, even when the unit cells 21, 21,... Constituting the battery module 1 according to the present embodiment generate heat by a high current rate discharge due to a temporary high load, the liquid (for example, water) in the temperature adjustment unit 5 Since the heat capacity is large, it is possible to prevent a rapid temperature increase of the unit cells 21, 21,. Thereby, in this embodiment, the battery module 1 excellent in the convenience which can endure temporary high load can be provided.
- the liquid for example, water
- the temperature adjustment unit 5 in the present embodiment is made of resin. Therefore, when the battery module 1 is exposed to a high temperature from the outside due to a vehicle fire or the like, the temperature adjusting unit 5 is melted by the heat. Accordingly, since the liquid flows out from the flow path 85, it is possible to suppress the fire. Thereby, in this embodiment, the battery module 1 with which safety
- the temperature adjustment unit 5 in this embodiment is used as a cooling unit, the unit cells 21, 21,... Can be cooled. Therefore, the temperature rise of the unit cell 21 due to large current charging or large current discharging can be suppressed.
- the temperature adjusting unit 5 in this embodiment is used as a temperature raising unit, the unit cells 21, 21,. Therefore, the battery module 1 can be used even in a cold region. Therefore, the battery module 1 which can be charged / discharged without being restrict
- the temperature range in which charging is possible is 0 to 60 ° C.
- the temperature range in which quick charging is possible is 10 to 45 ° C.
- the practical temperature range in which discharging is possible is ⁇ 20 to 60 ° C. It is. Therefore, when a lithium ion secondary battery is used as the unit cell 21, the temperature of the unit cell 21 may be adjusted so that the temperature of each unit cell 21 falls within this temperature range.
- the unit main body 71 and the lid 87 are laser welded or thermocompression bonded to each other at the periphery, and the ribs 89, 89, ... are adjacent to each other in the series direction V2. It is sandwiched between the matching holding portions 81, 81. Therefore, even when an impact is applied to the temperature adjustment unit 5, the fixed state of the unit main body 71 and the lid 87 can be maintained. Accordingly, liquid leakage from the channel 85 can be prevented.
- the holding portions 81, 81,... Communicate with each other in the parallel direction V1. Therefore, compared with the case where the holding parts do not communicate with each other in the parallel direction V1, the interval between the holding parts 81, 81 in the parallel direction V1 can be reduced. Therefore, in this embodiment, since the small unit main body 71 can be provided, the small battery module 1 can be provided. In other words, in the present embodiment, the unit cells 21, 21,... Can be arranged with high density in the battery module 1. Moreover, as described above, each of the unit cells 21, 21,... Constituting the assembled battery 43 can be brought into close contact with the holding portion 81.
- the pump 103 in the temperature adjustment system 101 can be downsized.
- a method of discharging a large current a method of configuring a battery module using a unit cell having a large charge / discharge current, and a method of configuring a battery module using a plurality of unit cells having a large charge / discharge current, and Can be considered.
- the unit cell is increased in size.
- it is necessary to increase the liquid circulation rate. This causes an increase in the size of the pump.
- each unit cell 21 only needs to contain an active material in substantially the same amount as a battery used as a power source for driving a mobile phone or a notebook computer. Therefore, the enlargement of the unit cells 21, 21,... Can be prevented. Therefore, since the surface area of the unit cells 21, 21,... In the battery module 1 is larger than that of the former method, the heat exchange efficiency between the unit cells 21, 21,. Thereby, the temperature of the unit cells 21, 21,... Can be adjusted without increasing the circulation rate of the liquid so much. Therefore, in this embodiment, the enlargement of the pump 103 can be suppressed.
- the pump 103 can be reduced in size, the ratio of the electric energy used for adjusting the temperature of the unit cells 21, 21,... To the electric energy supplied by the battery module 1 can be kept low. Therefore, in this embodiment, the battery module 1 excellent in energy saving can be provided.
- the shape of the unit main body is described using the first flat surface portion, the second flat surface portion, and the side wall portion, but the shape of the unit main body in the present embodiment is described as follows.
- the holding portions are arranged in a matrix on the resin plate-like member.
- Each holding portion is formed in a concave shape having the bottom surface of the resin plate-like member as the bottom surface, and communicates with each other in the parallel direction V1.
- a portion other than the holding portion is a recess having the upper surface of the resin plate-like member as a bottom surface, and the flow path is constituted by the recess and the lid.
- the present embodiment may have the following configuration.
- the holding parts do not have to communicate with each other in the parallel direction V1.
- the unit main body is continuously formed with the resin molded body 79 as a repeating unit not only in the series direction V2 but also in the parallel direction V1.
- the holding portions communicate with each other in the parallel direction V1
- the unit cells can be arranged with high density in the battery module, and the battery module can be reduced in size.
- the rigidity of the temperature adjustment unit 5 in the series direction V2 can be weakened, so that the temperature adjustment unit 5 can have elasticity. . Therefore, the unit cell constituting the assembled battery can be brought into close contact with the holding portion.
- the holding portions communicate with each other in the parallel direction V1.
- the rigidity of the temperature adjustment unit 5 in the series direction V2 is too weak and the holding force of the unit cell by the holding unit is reduced, it is only necessary that some holding units communicate with each other in the parallel direction V1.
- the number of the second planar portions may be the same as the number of assembled batteries constituting the assembled battery assembly, and may be larger than the number of assembled batteries constituting the assembled battery assembly.
- the lid may close only between the two side walls defining the flow path on the second flat surface side of the unit body.
- the ribs may be provided only in a part of the parallel direction V1, or may be sandwiched between communication portions adjacent to each other in the series direction V2.
- One of the first pipe and the second pipe may be a discharge pipe and the other may be a supply pipe.
- the holding part may have the structure in the following first and second modified examples.
- the temperature adjustment unit may have a structure in second and third embodiments described later.
- FIG. 15 is a cross-sectional view showing a state in which each unit cell 21 is held in close contact with the holding portion 81 and liquid is supplied to the flow path 85 in the first modification. 15 shows a side view of the unit cells 21, 21,... In the following, differences from the first embodiment will be mainly described.
- the width of the two side wall portions 277 and 277 defining the holding portion 81 is larger than the width of the unit cell 21 on the first plane portion 73 side.
- the edges of the two side wall portions 277 and 277 that define the holding portion 81 are subjected to R surface or C surface processing.
- the R (diameter) of the R surface applied to the edges of the two side wall portions that define the holding portion may be sufficiently large so that the first flat surface portion is configured by the R surface.
- FIG. 16 is a cross-sectional view showing a state in which each unit cell 21 is held in close contact with the holding portion 81 and liquid is supplied to the flow path 85 in the second modification. 16 shows a side view of the unit cells 21, 21,... In the following, differences from the first embodiment will be mainly described.
- the widths of the two side wall portions 377 and 377 defining the holding portion 81 are larger from the second flat surface portion 75 toward the first flat surface portion 73 side. Specifically, the widths of the two side wall portions 377 and 377 defining the holding portion 81 are substantially the same as the outer diameter of the unit cell 21 in the second plane portion 75, but on the first plane portion 73 side. It is larger than the outer diameter of the unit cell 21.
- each unit cell 21 is easily inserted into the holding portion 81.
- the width of the two side wall portions 377, 377 defining the holding portion 81 is too larger than the outer diameter of the unit cell 21 on the first plane unit 73 side, the unit cells 21, 21,. It becomes difficult to adjust the temperature. From these, the two side wall portions 377 and 377 defining each holding portion 81 are in close contact with each holding portion 81 from a direction perpendicular to the second plane portion 75 (in other words, It may be inclined by about 1 to 5 degrees (from the axial direction of the held unit cell 21).
- Embodiment 2 of the Invention >> In the first embodiment and the second embodiment, the structure of the temperature adjustment unit is different. In the following, points different from those of the first embodiment will be mainly described.
- FIG. 17 is a perspective view of the temperature adjustment unit 405 in the present embodiment
- FIG. 17B is a plan view thereof
- 18 is a cross-sectional view taken along the line XVIII-XVIII shown in FIG. 17B
- FIG. 19 is a cross-sectional view shown in FIG. It is sectional drawing which shows the state supplied. 19 shows a side view of the unit cells 21, 21,.
- the temperature adjusting unit 405 in this embodiment is formed by a blow molding method, and is formed of a resin molded body in which a first flat portion 473, a second flat portion 475, and a side wall portion 477 are integrally formed.
- the first flat surface portion 473 and the side wall portion 477 are the same as the first flat surface portion 73 and the side wall portion 77 in the first embodiment, respectively, but the second flat surface portion 475 is opposed to the first flat surface portion 473. Yes. That is, the temperature adjustment unit 405 has one second flat portion 475.
- each holding portion 81 is defined by two side wall portions 477 and 477.
- the flow path 85 is defined by being surrounded by a first flat portion 473, a second flat portion 475, and two side wall portions 477 and 477.
- the holding portion 81S is defined by a side wall portion 477S (2) and a side wall portion 477T (1).
- the side wall part 477S (2) forms a flow path 85 with the first flat part 473S, the side wall part 477S (1), and the second flat part 475S, and the side wall part 477T (1)
- the flat surface portion 473T, the side wall portion 477T (2), and the second flat surface portion 475T constitute the flow path 85. Therefore, the unit cell 21S is in close contact with each of the side wall part 477S (2) and the side wall part 477T (1), and is separated from the side wall part 477S (2) and the side wall part 477T (1) with respect to the liquid. Retained.
- the temperature adjustment system 101 in the first embodiment may be used.
- FIG. 20 is a flowchart showing a method for manufacturing the battery module according to this embodiment.
- step S201 the temperature adjustment unit 405 is manufactured by, for example, blow molding (step (e)).
- step S202 the unit cells 21, 21,... Are connected in parallel with each other to produce the assembled battery 43 (step (f)).
- step S203 the assembled battery 43 is inserted into the temperature adjustment unit 405.
- each of the unit cells 21, 21,... Constituting the assembled battery 43 is press-fitted into the holding portion 81 of the temperature adjustment unit 405.
- the unit cells 21, 21,... Constituting the assembled battery 43 are held in close contact with the holding portions 81, 81,. (Step (g)).
- step S204 the assembled batteries 43, 43,... Are connected in series to produce the assembled battery assembly 7 (step (f)).
- the structure of the temperature adjustment unit is different between the present embodiment and the first embodiment.
- the temperature adjustment unit 405 is formed of a resin molded body, and each holding portion 81 and the flow path 85 are partitioned through the side wall portion 477. Therefore, the same effect as in the first embodiment can be obtained.
- the flow path 85 in the present embodiment is defined by being surrounded by the first flat surface portion 473, the second flat surface portion 475, and the two side wall portions 477 and 477. Therefore, in this embodiment, since the lid body 87 in the first embodiment is unnecessary, the number of components can be reduced as compared with the first embodiment. Therefore, in this embodiment, the cost of the battery module can be suppressed, and the manufacturing time of the battery module can be shortened.
- the flow path 85 is defined by being surrounded by the first flat surface portion 473, the second flat surface portion 475, and the two side wall portions 477 and 477. Liquid leakage can be further suppressed than in the first embodiment. Therefore, it is effective when a battery (for example, a lithium ion secondary battery) that dislikes water is used as the unit cell 21.
- a battery for example, a lithium ion secondary battery
- the shape of the temperature adjustment unit is described using the first flat surface portion, the second flat surface portion, and the side wall portion, but the shape of the temperature adjustment unit in the present embodiment will be described next. It can also be explained as shown.
- the holding portions are arranged in a matrix on the resin plate-like member. Each holding part penetrates in the thickness direction of the resin plate-like member and communicates with each other in the parallel direction V1. A portion other than the holding portion of the resin plate-like member is hollow and is a flow path.
- this embodiment may have the structure shown below.
- the holding units do not have to communicate with each other in the parallel direction V1. However, for the reason described in the first embodiment, it is preferable that the holding portions communicate with each other in the parallel direction V1.
- the holding unit may be the holding unit in the first modified example or the holding unit in the second modified example.
- Embodiment 3 of the Invention includes one temperature adjustment unit formed by a blow molding method.
- the blow molding method generally, as the hollow portion of the resin molded product in the direction perpendicular to the air supply direction becomes deeper, it becomes difficult to mold the resin molded product. Therefore, when the height of the unit cell 21 increases, the unit cell 21 may protrude from the upper surface or the lower surface of the temperature adjustment unit 405.
- the temperature adjustment units 405 and 405 in the second embodiment are stacked in the height direction of the unit cell 21.
- 21 is a perspective view of the temperature adjustment unit 505 in the present embodiment
- FIG. 22 is a cross-sectional view taken along line XXII-XXIII shown in FIG. 21
- FIG. 23 is a cross-sectional view shown in FIG.
- FIG. 6 is a cross-sectional view showing a state where the liquid is supplied to the flow path 85 while being held in close contact with the holding portion 81. 23 shows a side view of the unit cells 21, 21,...
- the second plane portion 475 of the upper temperature adjustment unit 405 and the first plane portion 473 of the lower temperature adjustment unit 405 are mutually connected.
- the holding portion 81 of the upper temperature adjustment unit 405 and the holding portion 81 of the lower temperature adjustment unit 405 communicate with each other.
- the unit cells 21 are held in close contact with the holding portions 81, 81 communicated with each other.
- FIG. 24 is a block diagram of the temperature adjustment system 601 in the present embodiment.
- the temperature adjustment system 601 in this embodiment includes an upper temperature adjustment unit 405, a pump 603, a heat exchanger 605, a lower temperature adjustment unit 405, a pump 613, a heat exchanger 615, and pump control. Part 621.
- the pump 603 controls the direction of liquid circulation in the flow path 85 of the upper temperature adjustment unit 405, and the pump 613 controls the direction of liquid circulation in the flow path 85 of the lower temperature adjustment unit 405.
- the pump control unit 621 controls the pump 603 and the pump 613 so that the liquid circulation direction by the pump 603 and the liquid circulation direction by the pump 613 are opposite to each other.
- the liquid is supplied from the first pipe 91 and discharged from the second pipe 93 in the upper temperature adjustment unit 405, while the liquid is supplied from the second pipe 93 in the upper temperature adjustment unit 405. Is supplied from the second pipe 93 and discharged from the first pipe 91.
- the structure of the temperature adjustment unit in the present embodiment is substantially the same as the structure of the temperature adjustment unit in the second embodiment, the same effect as in the second embodiment can be obtained.
- the liquid circulation direction is different between the upper temperature adjustment unit 405 and the lower temperature adjustment unit 405. Therefore, in this embodiment, the variation in the temperature of the unit cell in the battery module can be reduced as compared with the first and second embodiments.
- the unit cell 21 positioned in the vicinity of the second tube 93 is the unit cell 21 positioned in the vicinity of the first tube 91 (supply tube). It is more difficult to adjust the temperature than it is (it is difficult to be cooled or heated).
- the unit cell 21 positioned in the vicinity of the first pipes 91 and 91 of the upper and lower temperature adjustment units 405 and 405 is heated in the heat exchanger 605 in the upper temperature adjustment unit 405.
- the temperature is adjusted to the liquid immediately after the adjustment, but in the lower temperature adjustment unit 405, the temperature is adjusted to the liquid immediately before returning to the heat exchanger 615 through the flow path 85.
- the unit cell 21 positioned in the vicinity of the second pipes 93 and 93 of the upper and lower temperature adjustment units 405 and 405 flows through the flow path 85 in the upper temperature adjustment unit 405 to the heat exchanger 615.
- the temperature adjustment unit 405 in the lower stage adjusts the temperature to the liquid immediately after the temperature adjustment in the heat exchanger 605. Therefore, in this embodiment, the variation in the temperature of the unit cell in the battery module can be further reduced as compared with the first and second embodiments.
- the temperature variation of the unit cell 21 in the battery module can be further reduced as compared with the first and second embodiments without increasing the flow rate of the liquid so much. Therefore, the ratio of the battery energy required for liquid circulation among the electric energy supplied by the battery module in the present embodiment can be suppressed to, for example, 0.5% or less. Therefore, it is possible to provide a battery module that is more energy saving than the first and second embodiments.
- this embodiment may have the structure shown below.
- the upper temperature adjustment unit and the lower temperature adjustment unit may be arranged at a distance from each other in the height direction of the unit cell.
- the temperature adjustment unit in the present embodiment may include three or more temperature adjustment units in the second embodiment.
- the number of temperature adjustment units in the second embodiment may be determined from the height of the unit cell and the thickness of the temperature adjustment unit in the second embodiment.
- the liquid may be circulated in the flow path of the upper temperature adjustment unit and the liquid may be circulated in the flow path of the lower temperature adjustment unit by one pump.
- the liquid may be branched to supply the first diversion flow to the flow path of the upper temperature adjustment unit and the second diversion flow to the flow path of the lower temperature adjustment unit.
- the direction in which the liquid circulates may be the same in the upper temperature adjustment unit and the lower temperature adjustment unit.
- the above effects can be obtained by reversing the directions in which the liquid circulates between the upper temperature adjustment unit and the lower temperature adjustment unit. Therefore, it is preferable to reverse the directions in which the liquid circulates between the upper temperature adjustment unit and the lower temperature adjustment unit.
- the lower temperature adjustment unit is arranged so that the first tube and the second tube are located on the front side
- the upper temperature adjustment unit is arranged so that the first tube and the second tube are located on the rear side. May be arranged.
- the temperature variation of the unit cells in the battery module is more than that in the first and second embodiments. Further reduction can be achieved.
- the temperature adjustment unit in the present embodiment can reduce the temperature variation of the unit cells in the battery module rather than the temperature adjustment unit. Therefore, the temperature adjustment unit in this embodiment is more preferable than this temperature adjustment unit.
- the temperature adjustment unit in the first to third embodiments may have the following configuration.
- the number of holding parts in the temperature adjustment unit may be the same as the number of unit cells constituting the assembled battery assembly. Needless to say, the number of assembled batteries constituting the assembled battery assembly is not limited to seven, and the number of unit cells constituting each assembled battery is not limited to twenty.
- the cross-sectional shape of the holding part in the temperature adjustment unit may be substantially the same as the outer shape of the unit cell.
- the unit cell may be rectangular.
- the temperature adjustment system in the first to third embodiments may have the following configuration.
- the liquid that adjusts the temperature of the unit cell may be, for example, a mixed liquid of ethylene glycol, a rust inhibitor, and water, or a liquid in which a preservative or an antifungal agent is mixed in water. May be.
- the liquid may be circulated using a heat pump.
- the battery modules in Embodiments 1 to 3 may have the following configuration.
- the battery module can also be used as a power source for driving an electric motorcycle or electric play equipment.
- the location of the battery module is not limited.
- the battery module is provided at the bottom of the electric vehicle, in the front of the vehicle in the traveling direction (for example, in the hood), or behind the traveling direction of the vehicle (in the loading platform). good.
- the materials for the case, the front panel, and the lid are not limited to the materials described in the first embodiment.
- the battery module may not include a case, a lid, and a front panel. However, if the battery module includes a case, a lid, and a front panel, the temperature adjustment unit can be prevented from being damaged by an external impact. In addition, the battery module can be mounted on an automobile or the like without worrying about the direction. Therefore, the battery module preferably includes a case, a lid, and a front panel.
- the unit cells in Embodiments 1 to 3 may have the following configuration.
- the unit cell may be a secondary battery (for example, a nickel metal hydride battery) other than the lithium ion secondary battery.
- a secondary battery for example, a nickel metal hydride battery
- the positive electrode and the negative electrode may each have a known configuration.
- known materials can be used, respectively.
- the assembled battery in the first to third embodiments may have the following configuration.
- FIG. 25 is an exploded perspective view of the assembled battery 843.
- each unit cell 821 is inserted through a through hole 857 a formed in the positive electrode connection portion 857 of the wiring board 860, and thereby the positive electrode connection portion 857 of the wiring board 860. It is connected to the. Further, the negative electrode terminal of each unit cell 821 is connected to the negative electrode connection portion 845 of the wiring board 860 via the negative electrode connection plate 869 and the conduction portion 870.
- the battery pack 843 shown in FIG. 25 is provided with the conducting portion 870 along the outer surface of the unit cell 821. For this reason, in the temperature adjustment unit, not only a holding portion where the unit cell 821 is held in close contact, but also a storage portion for storing the conduction portion 870 may be formed.
- the assembled battery 843 illustrated in FIG. 25 includes conductive portions 870 and 870. Therefore, in the temperature adjustment unit that holds the unit cells 821, 821,... Constituting the assembled battery 843, the degree of adhesion of the unit cell 821 with respect to the holding unit is lower than those in the first to third embodiments.
- the conducting portions 870 and 870 are provided along the outer surface of some of the unit cells 821 constituting the assembled battery 843. For this reason, the unit cells 821, 821 provided with the conducting portion 870 along the outer surface are less likely to be temperature-controlled than the unit cells 821, 821,. For these reasons, in the assembled battery, it is preferable that the outer surface and the upper surface of the battery case be the negative electrode terminal of the unit cell.
- the materials of the negative electrode plate, the negative electrode connection plate, the positive electrode connection plate, and the positive electrode connection piece are not limited to the materials described in the first embodiment, and the thicknesses thereof are not limited to the numerical values described in the first embodiment.
- Double-sided tape may be attached to each of the upper and lower surfaces of the insulating plate.
- the number of through holes formed in each of the negative electrode connection plate, the insulating plate, and the positive electrode connection plate, and the number of positive electrode connection pieces may be the same as the number of unit cells constituting the assembled battery.
- the present invention is useful as a driving power source for automobiles, electric motorcycles, electric playground equipment, and the like.
- Temperature adjustment unit 7 Aggregate 21 Cell 43 battery pack 71 Unit body 73 First plane part 75 Second plane part 77 Side wall 79 resin moldings 81 Holding part 85 flow path 87 lid 88 Coated surface 89 Ribs 91 First tube 93 Second tube 101 Temperature control system 103 pump 277 Side wall 377 Side wall 405 Temperature adjustment unit 473 First plane part 475 Second plane 477 Side wall 505 Temperature adjustment unit 601 temperature control system 603 pump 613 pump 621 Pump controller L1 center line V1 parallel direction V2 Series direction
Abstract
Description
図1は、実施形態1に係る電池モジュール1の分解斜視図である。
図15は、第1の変形例において、各素電池21が保持部81に密着されて保持され液体が流路85に供給された状態を示す断面図である。なお、図15には、素電池21,21,…の側面図を記載している。以下には、上記実施形態1とは異なる点を主に説明する。
図16は、第2の変形例において、各素電池21が保持部81に密着されて保持され液体が流路85に供給された状態を示す断面図である。なお、図16には、素電池21,21,…の側面図を記載している。以下には、上記実施形態1とは異なる点を主に説明する。
上記実施形態1と実施形態2とでは、温度調整用ユニットの構造が相異なる。以下では、上記実施形態1とは異なる箇所を重点的に説明する。
上記実施形態2に係る電池モジュールは、ブロー成形法により成形された温度調整用ユニットを1つ備えている。ところで、ブロー成形法では、一般に、空気を供給する方向に対して垂直な方向における樹脂成型品の中空部の深さが深くなるにつれ、樹脂成型品の成形が困難になる。そのため、素電池21の高さが高くなると、素電池21が温度調整用ユニット405の上面又は下面から突出する場合がある。
上記実施形態1~3における温度調整用ユニットは、次に示す構成であっても良い。
5 温度調整用ユニット
7 集合体
21 素電池
43 組電池
71 ユニット本体
73 第1の平面部
75 第2の平面部
77 側壁部
79 樹脂成形体
81 保持部
85 流路
87 蓋体
88 被覆面
89 リブ
91 第1の管
93 第2の管
101 温度調整システム
103 ポンプ
277 側壁部
377 側壁部
405 温度調整用ユニット
473 第1の平面部
475 第2の平面部
477 側壁部
505 温度調整用ユニット
601 温度調整システム
603 ポンプ
613 ポンプ
621 ポンプ制御部
L1 中心線
V1 並列方向
V2 直列方向
Claims (14)
- 互いに電気的に接続された複数の素電池と、
前記素電池の温度を調整する温度調整用ユニットとを備え、
前記温度調整用ユニットは、
第1の平面部と、前記第1の平面部とは反対側に位置する第2の平面部と、前記第1の平面部と前記第2の平面部とに接続された側壁部とが一体的に形成された樹脂成形体からなり、
前記側壁部により、前記素電池のそれぞれを保持する保持部と前記素電池の温度を調整する液体が流れる流路とに区画されており、
前記素電池は、前記側壁部で区画された前記保持部に密着されて保持されている電池モジュール。 - 請求項1に記載の電池モジュールであって、
前記温度調整用ユニットは、ユニット本体と、蓋体とを有し、
前記ユニット本体は、
前記第1の平面部、前記側壁部、前記第2の平面部及び前記側壁部がこの順に接続されて形成された樹脂成形体を繰り返し単位として、連続的に形成されており、
前記蓋体は、前記ユニット本体の前記第2の平面部側に設けられており、
前記流路は、前記第1の平面部と、2つの前記側壁部と、前記蓋体とで規定されており、
前記保持部は、2つの前記側壁部と、前記第2の平面部とで規定されている電池モジュール。 - 請求項2に記載の電池モジュールであって、
前記蓋体は、前記第2の平面部側に対向して配置される被覆面と、前記被覆面に設けられたリブとを有し、
前記リブは、前記流路を規定する前記2つの側壁部に挟持されており、
前記被覆面の周縁が前記ユニット本体の周縁にレーザー溶着又は熱圧着されている電池モジュール。 - 請求項1に記載の電池モジュールであって、
前記保持部は、2つの前記側壁で規定されており、
前記流路は、前記第1の平面部と前記第2の平面部と2つの前記側壁部とに囲まれて規定されている電池モジュール。 - 請求項4に記載の電池モジュールであって、
互いに同一形状に形成された2つの前記温度調整用ユニットを備え、
前記2つの温度調整用ユニットでは、
一方の前記温度調整用ユニットの前記第1の平面部と他方の前記温度調整用ユニットの前記第2の平面部とが互いに対向しており、
一方の前記温度調整用ユニットの前記保持部と他方の前記温度調整用ユニットの前記保持部とが互いに連通している電池モジュール。 - 請求項1に記載の電池モジュールであって、
前記保持部を規定する2つの前記側壁部の幅は、前記第1の平面部側において、前記素電池の幅よりも大きい電池モジュール。 - 請求項6に記載の電池モジュールであって、
前記保持部を規定する2つの前記側壁部の幅は、前記第2の平面部側から前記第1の平面部側へ向かうにつれて大きい電池モジュール。 - 請求項1に記載の電池モジュールであって、
前記素電池は、金属缶からなる電池ケースを有している電池モジュール。 - 請求項1に記載の電池モジュールであって、
前記温度調整用ユニットは、前記液体を前記流路に供給する供給部と、前記液体を前記流路から排出する排出部とをさらに有する電池モジュール。 - 請求項1に記載の電池モジュールであって、
前記温度調整用ユニットは、前記素電池を冷却する冷却用ユニットであり、
前記液体は、前記素電池を冷却する冷媒である電池モジュール。 - 請求項2に記載の電池モジュールを製造する方法であって、
射出成形により前記ユニット本体を形成する工程(a)と、
前記ユニット本体の前記第2の平面部側に前記蓋体を設ける工程(b)と、
前記複数の素電池を電気的に接続する工程(c)と、
前記ユニット本体の前記保持部のそれぞれに前記素電池を密着させて保持させる工程(d)とを備えている電池モジュールの製造方法。 - 請求項4に記載の電池モジュールを製造する方法であって、
ブロー成形により前記温度調整用ユニットを形成する工程(e)と、
前記複数の素電池を電気的に接続する工程(f)と、
前記温度調整用ユニットの前記保持部のそれぞれに前記素電池を密着させて保持させる工程(g)とを備えている電池モジュールの製造方法。 - 請求項1に記載の前記電池モジュールと、
前記流路内で前記液体を循環させるポンプとを備えた温度調整システム。 - 請求項5に記載の前記電池モジュールと、
ポンプ制御部とを備え、
前記ポンプ制御部は、前記一方の温度調整用ユニットに設けられた前記流路内において前記液体が循環する向きと前記他方の温度調整用ユニットに設けられた前記流路内において前記液体が循環する向きとを互いに逆にする温度調整システム。
Priority Applications (3)
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EP10816837A EP2339688A4 (en) | 2009-09-18 | 2010-08-19 | ACCUMULATOR MODULE, METHOD FOR MANUFACTURING THE SAME, AND TEMPERATURE ADJUSTMENT SYSTEM |
CN2010800033895A CN102227846A (zh) | 2009-09-18 | 2010-08-19 | 电池模块及其制造方法、以及温度调节系统 |
US13/127,179 US20110206970A1 (en) | 2009-09-18 | 2010-08-19 | Battery module, method for fabricating the same, and temperature adjusting system |
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JP2009216464A JP2011065907A (ja) | 2009-09-18 | 2009-09-18 | 電池モジュール及びその製造方法並びに温度調整システム |
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EP (1) | EP2339688A4 (ja) |
JP (1) | JP2011065907A (ja) |
KR (1) | KR20110069122A (ja) |
CN (1) | CN102227846A (ja) |
WO (1) | WO2011033722A1 (ja) |
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EP2339688A1 (en) | 2011-06-29 |
KR20110069122A (ko) | 2011-06-22 |
JP2011065907A (ja) | 2011-03-31 |
EP2339688A4 (en) | 2012-03-28 |
US20110206970A1 (en) | 2011-08-25 |
CN102227846A (zh) | 2011-10-26 |
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