WO2013030883A1 - 車両 - Google Patents
車両 Download PDFInfo
- Publication number
- WO2013030883A1 WO2013030883A1 PCT/JP2011/004835 JP2011004835W WO2013030883A1 WO 2013030883 A1 WO2013030883 A1 WO 2013030883A1 JP 2011004835 W JP2011004835 W JP 2011004835W WO 2013030883 A1 WO2013030883 A1 WO 2013030883A1
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- WO
- WIPO (PCT)
- Prior art keywords
- assembled battery
- capacity
- power
- battery
- vehicle
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
-
- 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
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch 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
- H01M10/6561—Gases
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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
- H01M10/6561—Gases
- H01M10/6566—Means within the gas flow to guide the flow around one or more cells, e.g. manifolds, baffles or other barriers
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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
- H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel 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
- 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
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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
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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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
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
- H01M50/291—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
- B60K2001/0405—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion characterised by their position
- B60K2001/0416—Arrangement in the rear part of the vehicle
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the present invention relates to a vehicle including a plurality of assembled batteries having different characteristics.
- a high-capacity battery and a high-power battery are connected in parallel to a load.
- the high capacity battery has a larger energy capacity than the high power battery.
- a high power battery can be charged and discharged with a larger current than a high capacity battery.
- Patent Document 1 discloses a vehicle including a high-capacity battery and a high-power battery, but does not disclose how to arrange the high-capacity battery and the high-power battery.
- High-capacity batteries and high-power batteries may have different characteristics or may be used differently. Therefore, in consideration of the characteristics of the high-capacity battery and the high-power battery, if the high-capacity battery and the high-power battery are not mounted on the vehicle, the merchantability of the vehicle may be reduced.
- the vehicle according to the present invention includes a motor that is a drive source for running the vehicle and an assembled battery that can supply power to the motor.
- the assembled battery is disposed in a luggage space of the vehicle, and includes a high-power assembled battery and a high-capacity assembled battery.
- the high-power assembled battery can be charged and discharged with a relatively larger current than the high-capacity assembled battery.
- the high-capacity assembled battery has a relatively large energy capacity than the high-power assembled battery, and has a higher dependence of the battery characteristics on the temperature than the high-power assembled battery.
- the high-capacity assembled battery is disposed so as to overlap the high-power assembled battery above the vehicle.
- High-capacity assembled batteries have a higher dependence on battery characteristics with respect to temperature than high-power assembled batteries. Therefore, it is easy to dissipate heat from the high-capacity assembled batteries, thereby securing the battery characteristics of the high-capacity assembled batteries. be able to.
- Battery characteristics include battery input / output power and battery capacity.
- the high-capacity assembled battery In a vehicle equipped with an engine that is a drive source for running the vehicle, when the vehicle is run using the output of the motor with the engine stopped, the high-capacity assembled battery is more powerful than the high-power assembled battery. Can be powered. By positively using the high-capacity assembled battery, it is possible to secure the mileage of the vehicle using electric energy and improve fuel efficiency.
- the usage frequency of the high-capacity assembled battery is higher than the usage frequency of the high-power assembled battery. Further, when the vehicle is driven using the output of the motor with the engine stopped, the ratio of the electric power supplied from the high-capacity assembled battery to the motor out of the electric power supplied to the motor is the high output type. It is higher than the rate of power supplied from the assembled battery to the motor.
- the high-capacity assembled battery can be charged using an external power source.
- the high-capacity assembled battery is mounted until the state of charge (SOC: State of Charge) of the high-capacity assembled battery approaches 0%. It can be discharged.
- SOC State of Charge
- After discharging the high-capacity assembled battery charge the high-capacity assembled battery using an external power supply, and when driving the vehicle using the output of the motor while the engine is stopped, The molded battery can be used again.
- the capacity of the high-capacity assembled battery can be increased, and the travel distance of the vehicle using electric energy can be increased. .
- the luggage space it becomes easier to secure a space for arranging the assembled battery as it is above the vehicle. Since the high-capacity assembled battery is disposed above the high-power assembled battery, the high-capacity assembled battery having a size larger than that of the high-power assembled battery can be easily disposed in the luggage space.
- High-capacity assembled batteries are replaced more frequently than high-power assembled batteries. Since the high-capacity assembled battery is more dependent on the temperature than the high-power assembled battery, the high-capacity assembled battery may be more likely to deteriorate than the high-power assembled battery in response to temperature changes. Also, by continuing to use the high-capacity assembled battery while the usage frequency of the high-capacity assembled battery is higher than the usage frequency of the high-power assembled battery, the high-capacity assembled battery becomes a high-power assembled battery. May be more susceptible to deterioration. If the high-capacity assembled battery deteriorates, it is necessary to replace the high-capacity assembled battery.
- the high-capacity assembled battery is used to secure the above-mentioned mileage of the vehicle, and the capacity of the high-capacity assembled battery can be changed according to the user's request. Also in this case, it is necessary to replace the high-capacity assembled battery. Thus, the high-capacity assembled battery has a higher replacement frequency than the high-power assembled battery.
- the high-capacity assembled battery is disposed above the high-power assembled battery, the operator can easily access the high-capacity assembled battery. Therefore, the operator can easily replace the high-capacity assembled battery.
- a high-power assembled battery can be composed of a plurality of single cells connected in series. Moreover, a high capacity
- a rectangular battery can be used as the single battery of the high-power assembled battery, and a cylindrical battery can be used as the single battery of the high-capacity assembled battery.
- a battery pack including a high-power assembled battery can be composed of a plurality of prismatic cells arranged in a predetermined direction and a case for housing the plurality of prismatic cells.
- a battery pack including a high-capacity assembled battery can be composed of a plurality of cylindrical unit cells, a holder that supports the plurality of cylindrical unit cells, and a case that houses the plurality of cylindrical unit cells and the holder. .
- the holder can be provided with a through hole into which each cylindrical cell is inserted. The end surface of the holder is in contact with the case.
- the cylindrical unit cell extends in a direction orthogonal to a predetermined plane (plane on which the holder is arranged), and the plurality of cylindrical unit cells are arranged side by side within the predetermined plane.
- the rigidity of the battery pack including the high-capacity assembled battery is increased. It can be made higher than the rigidity of the battery pack containing.
- the high-capacity assembled battery is disposed above the high-power assembled battery, it is in a position where it is easily subjected to external force.
- the heat exchange medium used for temperature control of the high-power assembled battery enters a space formed between two unit cells adjacent in a predetermined direction, and exchanges heat with the high-power assembled battery. Can be made.
- the heat exchange medium used for temperature adjustment of the high-capacity assembled battery can be moved along a predetermined plane to exchange heat with the high-capacity assembled battery.
- the pressure loss in the high-power assembled battery tends to be higher than the pressure loss in the high-capacity assembled battery.
- the high-capacity assembled battery is disposed above the high-power assembled battery, noise generated by the high-power assembled battery can be blocked by the high-capacity assembled battery. Thereby, it can suppress that the noise which generate
- FIG. 1 is a schematic diagram showing a configuration of a battery system.
- the battery system of this embodiment is mounted on a vehicle.
- a connection indicated by a solid line represents an electrical connection
- a connection indicated by a dotted line represents a mechanical connection.
- the battery system has a high-power assembled battery 10 and a high-capacity assembled battery 20 connected in parallel.
- the high-power assembled battery 10 is connected to the inverter 31 via system main relays SMR-B1 and SMR-G1.
- the high-capacity assembled battery 20 is connected to the inverter 31 via system main relays SMR-B2 and SMR-G2.
- the inverter 31 converts the DC power supplied from the assembled batteries 10 and 20 into AC power.
- the inverter 31 is connected to a motor / generator 32 (AC motor).
- the motor / generator 32 receives AC power supplied from the inverter 31 and generates kinetic energy for running the vehicle.
- the motor / generator 32 is connected to the wheels 33.
- An engine 34 is connected to the wheel 33, and kinetic energy generated by the engine 34 is transmitted to the wheel 33.
- the motor / generator 32 converts kinetic energy generated during braking of the vehicle into electric energy (AC power).
- the inverter 31 converts AC power generated by the motor / generator 32 into DC power and supplies the DC power to the assembled batteries 10 and 20. Thereby, the assembled batteries 10 and 20 can store regenerative electric power.
- the controller 35 outputs a control signal to each of the inverter 31 and the motor / generator 32 to control their drive. Further, the controller 35 switches between on and off by outputting control signals to the system main relays SMR-B1, B2, SMR-G1, and G2.
- the assembled batteries 10 and 20 are connected to the inverter 31, but the present invention is not limited to this.
- a booster circuit can be arranged in the current path between the assembled batteries 10 and 20 and the inverter 31. Thereby, the booster circuit can boost the output voltage of the assembled batteries 10 and 20.
- the vehicle of this embodiment includes not only the assembled batteries 10 and 20 but also the engine 34 as a power source for running the vehicle.
- Some engines 34 use gasoline, diesel fuel or biofuel.
- the vehicle can be driven using only the output of the high-power assembled battery 10 or the output of the high-capacity assembled battery 20.
- This travel mode is referred to as an EV (Electric Vehicle) travel mode.
- the high-capacity assembled battery 20 can be discharged to run the vehicle until the state of charge (SOC: State : of Charge) reaches from near 100% to near 0%. After the SOC of the high-capacity assembled battery 20 reaches near 0%, the high-capacity assembled battery 20 can be charged using an external power source.
- the external power source is a power source that is disposed outside the vehicle and is provided separately from the vehicle.
- a commercial power source can be used. When a commercial power source is used, a charger that converts AC power into DC power is required.
- HV Hybrid Vehicle
- charging / discharging of the high-power assembled battery 10 can be controlled so that the SOC of the high-power assembled battery 10 changes along a predetermined reference SOC.
- the high-power assembled battery 10 When the SOC of the high-power assembled battery 10 is higher than the reference SOC, the high-power assembled battery 10 can be discharged to bring the SOC of the high-power assembled battery 10 closer to the reference SOC. Further, when the SOC of the high-power assembled battery 10 is lower than the reference SOC, the high-power assembled battery 10 can be charged to bring the SOC of the high-power assembled battery 10 close to the reference SOC.
- the HV traveling mode not only the high-power assembled battery 10 but also the high-capacity assembled battery 20 can be used. That is, it is possible to leave the capacity of the high-capacity assembled battery 20 and discharge the high-capacity assembled battery 20 in the HV traveling mode. In addition, regenerative power can be stored in the high-capacity assembled battery 20.
- the high-capacity assembled battery 20 can be used mainly in the EV running mode, and the high-power assembled battery 10 can be used mainly in the HV running mode.
- Using the high-capacity assembled battery 20 mainly in the EV travel mode means the following two cases. First, it means that the usage frequency of the high-capacity assembled battery 20 is higher than the usage frequency of the high-power assembled battery 10 in the EV traveling mode. Secondly, when the high-capacity assembled battery 20 and the high-power assembled battery 10 are used in combination in the EV traveling mode, the output power of the high-capacity assembled battery 20 occupies out of the total power used for traveling the vehicle. This means that the ratio is higher than the ratio occupied by the output power of the high-power assembled battery 10.
- the total power here is not instantaneous power but power in a predetermined travel time or travel distance.
- the high-power assembled battery 10 has a plurality of single cells 11 connected in series as shown in FIG.
- a secondary battery such as a nickel metal hydride battery or a lithium ion battery can be used.
- the number of single cells 11 constituting the high-power assembled battery 10 can be appropriately set in consideration of the required output of the high-power assembled battery 10 and the like.
- the unit cell 11 is a so-called rectangular unit cell.
- a rectangular unit cell is a unit cell in which the outer shape of the battery is formed along a rectangular parallelepiped.
- the unit cell 11 has a battery case 11a formed along a rectangular parallelepiped, and the battery case 11a houses a power generation element that performs charging and discharging.
- the power generation element includes a positive electrode element, a negative electrode element, and a separator disposed between the positive electrode element and the negative electrode element.
- the separator contains an electrolytic solution.
- the positive electrode element has a current collector plate and a positive electrode active material layer formed on the surface of the current collector plate.
- the negative electrode element has a current collector plate and a negative electrode active material layer formed on the surface of the current collector plate.
- a positive electrode terminal 11b and a negative electrode terminal 11c are arranged on the upper surface of the battery case 11a.
- the positive terminal 11b is electrically connected to the positive element of the power generation element
- the negative terminal 11c is electrically connected to the negative element of the power generation element.
- a plurality of single cells 11 are arranged in one direction.
- a partition plate 12 is arranged between two unit cells 11 arranged adjacent to each other.
- the partition plate 12 can be formed of an insulating material such as resin, and the two unit cells 11 can be in an insulated state.
- a space can be formed on the outer surface of the unit cell 11. Specifically, a protrusion that protrudes toward the unit cell 11 can be provided on the partition plate 12. A space can be formed between the partition plate 12 and the unit cell 11 by bringing the tip of the protruding portion into contact with the unit cell 11. In this space, air (corresponding to a heat exchange medium) used for adjusting the temperature of the unit cell 11 can be moved.
- cooling air can be guided to the space formed between the partition plate 12 and the unit cell 11.
- the cooling air can suppress the temperature rise of the unit cell 11 by exchanging heat with the unit cell 11.
- the heating air can be guided to the space formed between the partition plate 12 and the unit cell 11.
- the air for heating can suppress a temperature drop of the unit cell 11 by exchanging heat with the unit cell 11.
- the temperature of the unit cell 11 can be adjusted using a gas having a component different from that of air.
- the plurality of single cells 11 are electrically connected in series by two bus bar modules 13.
- the bus bar module 13 includes a plurality of bus bars and a holder that holds the plurality of bus bars.
- the bus bar is made of a conductive material, and is connected to the positive terminal 11b of one unit cell 11 and the negative terminal 11c of the other unit cell 11 out of two unit cells 11 arranged adjacent to each other.
- the holder is made of an insulating material such as resin.
- a pair of end plates 14 are arranged at both ends of the high-power assembled battery 10 in the arrangement direction of the plurality of single cells 11.
- a pair of end plates 14 is connected to a restraining band 15 extending in the arrangement direction of the plurality of single cells 11.
- the restraining force is a force that sandwiches each unit cell 11 in the arrangement direction of the plurality of unit cells 11. By applying a binding force to the unit cell 11, expansion of the unit cell 11 can be suppressed.
- two restraining bands 15 are disposed on the upper surface of the high-power assembled battery 10, and two restraining bands 15 are disposed on the lower surface of the high-power assembled battery 10.
- the number of the restraint bands 15 can be set as appropriate. That is, it is only necessary that the restraint force can be applied to the unit cell 11 using the restraint band 15 and the end plate 14. On the other hand, it is not necessary to apply a restraining force to the unit cell 11, and the end plate 14 and the restraining band 15 can be omitted.
- the plurality of single cells 11 are arranged in one direction, but the present invention is not limited to this.
- one battery module can be configured using a plurality of single cells, and the plurality of battery modules can be arranged in one direction.
- the high-capacity assembled battery 20 has a plurality of battery blocks 21 connected in series as shown in FIG.
- Each battery block 21 has a plurality of single cells 22 connected in parallel.
- the number of battery blocks 21 and the number of single cells 22 included in each battery block 21 can be appropriately set in consideration of the required output and capacity of the high-capacity assembled battery 20.
- a plurality of single cells 22 are connected in parallel, but the present invention is not limited to this.
- the battery block 21 can also be configured by preparing a plurality of battery modules in which a plurality of single cells 22 are connected in series and connecting the plurality of battery modules in parallel.
- the unit cell 22 is a so-called cylindrical unit cell.
- a cylindrical unit cell is a unit cell in which the outer shape of the battery is formed along a cylinder.
- the cylindrical unit cell 22 has a cylindrical battery case 22a as shown in FIG. A power generation element is accommodated in the battery case 22a.
- the constituent members of the power generation element in the unit cell 22 are the same as the constituent members of the power generation element in the unit cell 11.
- a positive electrode terminal 22b and a negative electrode terminal 22c are provided at both ends in the longitudinal direction of the unit cell 22, respectively.
- the positive electrode terminal 22b and the negative electrode terminal 22c constitute a battery case 22a.
- the positive terminal 22b is electrically connected to the positive element of the power generation element, and the negative terminal 22c is electrically connected to the negative element of the power generation element.
- the unit cell 22 of this example has a diameter of 18 [mm] and a length of 65.0 [mm], and is a so-called 18650 type battery.
- a unit cell 22 having a size different from that of the 18650-type unit cell 22 may be used.
- the size of the rectangular unit cell 11 is larger than the size of the cylindrical unit cell 22.
- the size of the cells 11 and 22 refers to the size of the portion with the largest dimension.
- the length W ⁇ b> 1 can be the size of the unit cell 11.
- the length W ⁇ b> 2 can be the size of the unit cell 22.
- the length W1 is larger than the length W2.
- the battery block 21 includes a plurality of unit cells 22 and a holder 23 that holds the plurality of unit cells 22.
- a high-capacity assembled battery 20 is configured.
- the plurality of battery blocks 21 are connected in series via an electric cable or the like.
- the high-capacity assembled battery 20 is used to secure a traveling distance in the EV traveling mode, and many single cells 22 are used. For this reason, the size of the high-capacity assembled battery 20 tends to be larger than the size of the high-power assembled battery 10.
- the holder 23 has a through hole 23a into which each cell 22 is inserted.
- the number of the through holes 23a is the same as the number of the unit cells 22.
- the plurality of unit cells 22 are arranged such that the positive terminal 22 b (or the negative terminal 22 c) is located on the same side with respect to the holder 23.
- the plurality of positive terminals 22b are connected to one bus bar, and the plurality of negative terminals 22c are connected to one bus bar. Thereby, the plurality of single cells 22 are electrically connected in parallel.
- the unit cell 22 extends in a direction perpendicular to the plane on which the holder 23 is arranged.
- the plurality of single cells 22 are arranged side by side in a plane on which the holder 23 is arranged. In the plane where the holder 23 is arranged, the positions where the plurality of single cells 22 are arranged can be set as appropriate.
- one holder 23 is used, but a plurality of holders 23 can also be used.
- one holder 23 can be used to hold the positive electrode terminal 22 b side of the unit cell 22, and the other holder 23 can be used to hold the negative electrode terminal 22 c side of the unit cell 22.
- Table 1 compares the characteristics of the cells 11 and 22. “High” and “Low” shown in Table 1 indicate the relationship when the two unit cells 11 and 22 are compared. That is, “high” means higher than the comparison target cell, and “low” means lower than the comparison unit cell.
- the output density of the cell 11 is higher than the output density of the cell 22.
- the power density of the unit cells 11 and 22 can be expressed as, for example, power per unit mass (unit [W / kg]) of the unit cell or power per unit volume (unit [W / L]) of the unit cell. it can.
- the output [W] of the unit cell 11 is higher than the output [W] of the unit cell 22.
- the output density in the electrode elements (positive electrode element or negative electrode element) of the unit cells 11 and 22 can be expressed, for example, as a current value per unit area of the electrode element (unit [mA / cm ⁇ 2]).
- the unit cell 11 is higher than the unit cell 22.
- the current value that can be passed through the electrode element of the unit cell 11 is larger than the current value that can be passed through the electrode element of the unit cell 22.
- the power capacity density of the unit cell 22 is higher than the power capacity density of the unit cell 11.
- the power capacity density of the cells 11 and 22 is expressed, for example, as a capacity per unit mass (unit [Wh / kg]) or a capacity per unit volume (unit [Wh / L]) of the cell. Can do.
- the power capacity [Wh] of the unit cell 22 is larger than the power capacity [Wh] of the unit cell 11.
- the capacity density in the electrode elements of the unit cells 11 and 22 is, for example, the capacity per unit mass of the electrode elements (unit [mAh / g]) or the capacity per unit volume of the electrode elements (unit [mAh / cc]). ).
- the unit cell 22 is higher than the unit cell 11.
- the capacity of the electrode element of the single battery 22 is larger than the capacity of the electrode element of the single battery 11.
- FIG. 6 is a schematic diagram showing the configuration of the power generation element in the unit cell 11
- FIG. 7 is a schematic diagram showing the configuration of the power generation element in the unit cell 22.
- the positive electrode element constituting the power generation element of the unit cell 11 includes a current collector plate 111 and an active material layer 112 formed on both surfaces of the current collector plate 111.
- the single battery 11 is a lithium ion secondary battery
- the material of the current collector plate 111 for example, aluminum can be used.
- the active material layer 112 includes a positive electrode active material, a conductive material, a binder, and the like.
- the negative electrode element constituting the power generation element of the unit cell 11 includes a current collector plate 113 and an active material layer 114 formed on both surfaces of the current collector plate 113.
- the unit cell 11 is a lithium ion secondary battery, for example, copper can be used as the material of the current collector plate 113.
- the active material layer 114 includes a negative electrode active material, a conductive material, a binder, and the like.
- a separator 115 is disposed between the positive electrode element and the negative electrode element, and the separator 115 is in contact with the active material layer 112 of the positive electrode element and the active material layer 114 of the negative electrode element.
- the power generation element can be configured by stacking the positive electrode element, the separator 115, and the negative electrode element in this order to form a stacked body and winding the stacked body.
- the active material layer 112 is formed on both surfaces of the current collector plate 111 and the active material layer 114 is formed on both surfaces of the current collector plate 113, but this is not restrictive.
- so-called bipolar electrodes can be used.
- the bipolar electrode the positive electrode active material layer 112 is formed on one surface of the current collector plate, and the negative electrode active material layer 114 is formed on the other surface of the current collector plate.
- a power generation element can be configured by laminating a plurality of bipolar electrodes via a separator.
- the positive electrode element constituting the power generation element of the unit cell 22 includes a current collector plate 221 and an active material layer 222 formed on both surfaces of the current collector plate 221.
- the material of the current collector plate 221 can be aluminum, for example.
- the active material layer 222 includes a positive electrode active material, a conductive material, a binder, and the like.
- the negative electrode element constituting the power generation element of the unit cell 22 includes a current collector plate 223 and an active material layer 224 formed on both surfaces of the current collector plate 223.
- copper can be used as the material of the current collector plate 223.
- the active material layer 224 includes a negative electrode active material, a conductive material, a binder, and the like.
- a separator 225 is disposed between the positive electrode element and the negative electrode element, and the separator 225 is in contact with the active material layer 222 of the positive electrode element and the active material layer 224 of the negative electrode element.
- the thickness D11 of the active material layer 112 is thinner than the thickness D21 of the active material layer 222.
- the thickness D12 of the active material layer 114 is smaller than the thickness D22 of the active material layer 224. Since the thicknesses D11 and D12 of the active material layers 112 and 114 are thinner than the thicknesses D21 and D22 of the active material layers 222 and 224, current flows easily between the positive electrode element and the negative electrode element in the unit cell 11. Therefore, the output density of the single battery 11 is higher than the output density of the single battery 22.
- the active material layer 112 is larger than the active material layer 222, and the active material layer 114 is larger than the active material layer 224. Since the thicknesses D21 and D22 of the active material layers 222 and 224 are thicker than the thicknesses D11 and D12 of the active material layers 112 and 114, the capacity density of the unit cell 22 is higher than the capacity density of the unit cell 11.
- FIG. 8 shows the output characteristics of the cells 11 and 22 with respect to temperature.
- the horizontal axis indicates the temperature
- the vertical axis indicates the output.
- FIG. 8 shows the output characteristics of the cells 11 and 22, but the input characteristics of the cells 11 and 22 have the same relationship as in FIG.
- the output performance of the single cell (high output type) 11 and the single cell (high capacity type) 22 decreases as the temperature decreases.
- the rate of decrease in output performance of the unit cell 11 is lower than the rate of decrease in output performance of the unit cell 22. That is, the output performance of the cell 22 is more susceptible to temperature than the output performance of the cell 11 and is highly dependent on temperature.
- FIG. 9 is a diagram showing the relationship between the capacity maintenance rate of the cells 11 and 22 and the temperature.
- the horizontal axis indicates the temperature, and the vertical axis indicates the capacity retention rate.
- the capacity maintenance rate is represented by a ratio (deterioration capacity / initial capacity) between the capacity of the single cells 11 and 22 in the initial state and the capacity of the single cells 11 and 22 in the use state (deterioration state).
- the initial state is a state immediately after the unit cells 11 and 22 are manufactured, and refers to a state before starting to use the unit cells 11 and 22.
- the graph shown in FIG. 9 shows the capacity retention rate of the unit cells 11 and 22 after repeated charging and discharging of the unit cell at each temperature.
- the capacity maintenance rate of the cells 11 and 22 tends to decrease as the temperature increases.
- the decrease in the capacity maintenance rate represents the deterioration of the cells 11 and 22.
- the unit cell 22 is higher than the unit cell 11 in terms of the rate of decrease in the capacity retention rate of the unit cell with respect to temperature rise. In other words, the unit cell 22 is more susceptible to deterioration with respect to temperature rise (temperature change) than the unit cell 11.
- the high-capacity assembled battery 20 is more dependent on the temperature than the high-power assembled battery 10.
- the direction of the arrow FR indicates the forward direction of the vehicle 100
- the direction of the arrow UP indicates the upper side of the vehicle 100.
- the high-power assembled battery 10 and the high-capacity assembled battery 20 are disposed in the luggage space LS, and the high-capacity assembled battery 20 is located above the high-power assembled battery 10.
- the luggage space LS is a space for placing luggage, and a part of the luggage space LS is used as a space for placing the assembled batteries 10 and 20.
- a boarding space RS is provided in front of the vehicle 100 from the luggage space LS.
- the boarding space RS is a space in which an occupant gets on and is defined according to the arrangement of the seats.
- the vehicle 100 includes a vehicle in which the boarding space RS and the luggage space LS are partitioned by a partition member, and a vehicle in which the boarding space RS and the luggage space LS are connected.
- the battery pack 10 ⁇ / b> A includes a high-power assembled battery 10 and a pack case 16 that houses the high-power assembled battery 10.
- the battery pack 20 ⁇ / b> A includes a high-capacity assembled battery 20 and a pack case 24 that houses the high-capacity assembled battery 20.
- the pack case 24 is fixed to the upper surface of the pack case 16.
- Battery packs 10A and 20A are fixed to the vehicle body.
- battery pack 10 ⁇ / b> A can be housed in a recess formed in the floor panel of vehicle 100.
- the recess can be used as a space for accommodating a spare tire.
- the battery pack 20A can be fixed to a vehicle body such as a floor panel or a cross member in a state of being disposed above the battery pack 10A.
- the bottom surface of the pack case 24 is in contact with the top surface of the pack case 16, but the present invention is not limited to this.
- the battery packs 10A and 20A can be arranged as shown in FIG. In FIG. 12, the battery packs 10A and 20A are fixed to the vehicle body, and the battery pack 20A is located above the battery pack 10A.
- a partition plate 101 is disposed between the battery packs 10A and 20A, and the battery packs 10A and 20A are separated from each other.
- the partition plate 101 is disposed between the battery packs 10 ⁇ / b> A and 20 ⁇ / b> A, but the partition plate 101 can be omitted. That is, battery packs 10 ⁇ / b> A and 20 ⁇ / b> A can be arranged apart from each other in the vertical direction of vehicle 100.
- the high-capacity assembled battery 20 is more susceptible to temperature than the high-power assembled battery 10.
- the high-capacity assembled battery 20 is disposed above the high-power assembled battery 10, and heat generated by the high-capacity assembled battery 20 is easily released to the outside.
- the high-capacity assembled battery 20 is disposed at a position that is less susceptible to heat than the high-power assembled battery 10.
- Deterioration of the high-capacity assembled battery 20 can be suppressed by facilitating heat dissipation of the high-capacity assembled battery 20. As described with reference to FIG. 9, if the high-capacity assembled battery 20 is prevented from becoming a high temperature state, the capacity of the high-capacity assembled battery 20 can be suppressed from decreasing. On the other hand, since the high-power assembled battery 10 is less susceptible to temperature than the high-capacity assembled battery 20, the high-power assembled battery 10 is placed in a space below the high-capacity assembled battery 20 (a space where heat can easily accumulate). The battery 10 can be disposed. Since the space located below the high-capacity assembled battery 20 is covered with the high-capacity assembled battery 20, heat tends to be trapped.
- the high-capacity assembled battery 20 is used more frequently than the high-power assembled battery 10.
- the EV travel mode is given priority over the HV travel mode, for example, the travel in the EV travel mode can be performed immediately after the vehicle 100 is started. Then, when traveling in the EV traveling mode can no longer be performed, the EV traveling mode can be switched to the HV traveling mode. If the frequency of use of the high-capacity assembled battery 20 increases, the high-capacity assembled battery 20 tends to generate heat due to charging and discharging. As described above, since the high-capacity assembled battery 20 is in an environment where heat dissipation is easier than that of the high-power assembled battery 10, the temperature increase of the high-capacity assembled battery 20 can be suppressed.
- the high-capacity assembled battery 20 can be charged by supplying power from an external power source, but the high-capacity assembled battery 20 generates heat more than the high-power assembled battery 10 during charging. Since the high-capacity assembled battery 20 is in an environment where heat dissipation is easier than the high-power assembled battery 10, the temperature increase of the high-capacity assembled battery 20 can be suppressed.
- the high-capacity assembled battery 20 is likely to be larger than the high-power assembled battery 10. If the number of the single cells 22 is increased, the capacity of the high-capacity assembled battery 20 can be increased and the travel distance in the EV travel mode can be extended. If the number of unit cells 22 increases, the high-capacity assembled battery 20 is likely to increase in size. In the luggage space LS, the space located above the vehicle 100 is likely to be wider than the space located below the vehicle 100. Therefore, as in this embodiment, by arranging the high-capacity assembled battery 20 above the high-power assembled battery 10, it is easy to secure a space for arranging the high-capacity assembled battery 20.
- the high-power assembled battery 10 can be disposed in a space that is also used to accommodate a spare tire, and the high-capacity assembled battery 20 can be disposed above the high-power assembled battery 10.
- the space in which the high-capacity assembled battery 20 is disposed is wider than the space in which the high-power assembled battery 10 is disposed.
- the capacity (in other words, size) of the high-capacity assembled battery 20 can be changed according to the user's needs.
- the high-capacity assembled battery 20 is disposed below the high-power assembled battery 10. In this case, it becomes difficult to arrange the high-capacity assembled battery 20 along a plane, and the outer shape of the high-capacity assembled battery 20 may be complicated. In the present embodiment, the high-capacity assembled battery 20 is disposed above the high-power assembled battery 10, so that the high-capacity assembled battery 20 can be easily disposed along a plane. The outer shape is not complicated.
- the high-capacity assembled battery 20 is disposed above the high-power assembled battery 10, an operator can access the high-capacity assembled battery 20 more easily than the high-power assembled battery 10. If the high-capacity assembled battery 20 is disposed below the high-power assembled battery 10, the high-power assembled battery 10 must be removed in order to access the high-capacity assembled battery 20.
- the high-capacity assembled battery 20 is more susceptible to temperature than the high-power assembled battery 10 and is likely to deteriorate.
- the high-capacity assembled battery 20 is used more frequently than the high-power assembled battery 10 and may be easily deteriorated.
- the high-capacity assembled battery 20 deteriorates, at least a part of the high-capacity assembled battery 20 needs to be replaced.
- the high-capacity assembled battery 20 has a higher replacement frequency than the high-power assembled battery 10. Therefore, as in this embodiment, the high-capacity assembled battery 20 can be easily replaced by arranging the high-capacity assembled battery 20 at a position that is easily accessible by the operator.
- the temperature adjusting air When adjusting the temperature of the high-capacity assembled battery 20, the temperature adjusting air can be moved along the outer periphery of the cylindrical unit cell 22, as shown in FIG.
- the air for temperature adjustment can move along a plane orthogonal to the longitudinal direction of the unit cell 22.
- the temperature adjusting air passes between two unit cells 11 arranged adjacent to each other as shown in FIG.
- the temperature adjusting air advances in the arrangement direction of the plurality of unit cells 11 and then enters between the two unit cells 11 arranged adjacent to each other.
- the air used for temperature adjustment of the high-capacity assembled battery 20 is easier to move than the air used for temperature adjustment of the high-power assembled battery 10. That is, since the outer surface of the cylindrical unit cell 22 is configured as a curved surface as shown in FIG. 4, air easily moves along the outer peripheral surface of the unit cell 22.
- the temperature adjusting air enters the space between the two unit cells 11 arranged adjacent to each other after traveling in the arrangement direction of the plurality of unit cells 11. Must. That is, the air for temperature adjustment must change the moving direction extremely.
- the pressure loss tends to be higher than in the flow path shown in FIG. In the flow path shown in FIG. 13, the air easily moves along the outer peripheral surface of the unit cell 22, so that the pressure loss tends to be low.
- air in the flow path shown in FIG. 14, air must enter between two unit cells 11 arranged adjacent to each other, and pressure loss occurs at a portion where air enters between the two unit cells 11. Tends to be high. As the pressure loss increases, noise is more likely to occur.
- noise generated in the high-power assembled battery 10 may go to the boarding space RS through the air inlet.
- the high-capacity assembled battery 20 covers the upper surface of the high-power assembled battery 10, the high-capacity assembled battery 20 blocks noise from the high-power assembled battery 10 toward the boarding space RS. be able to. Thereby, it can suppress that the noise which generate
- the battery pack 20A tends to be more rigid than the battery pack 10A.
- the unit cell 22 of the high-capacity assembled battery 20 is held by the holder 23, and the pack case 24 is in contact with the end surface of the holder 23. Yes.
- the electrodes 11b and 11c are provided on the upper part of the high-power assembled battery 10 (unit cell 11), and the pack case 16 is separated from the electrodes 11b and 11c. Yes. Therefore, when the external force F is applied to the pack case 16, the pack case 16 is easily bent.
- the battery pack 20A Since the space above the battery pack 20A is a space for storing luggage or the like, the battery pack 20A is easily subjected to external force when storing the luggage or the like. As described above, the battery pack 20A has higher rigidity than the battery pack 10A, and therefore easily receives external force.
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Abstract
Description
Claims (10)
- 車両を走行させる駆動源であるモータと、
前記モータに電力を供給可能であり、ラゲッジスペースに配置された高出力型組電池および高容量型組電池と、を備え、
前記高出力型組電池は、前記高容量型組電池より相対的に大きな電流で充放電が可能であり、
前記高容量型組電池は、前記高出力型組電池より相対的に大きなエネルギ容量を有し、温度に対する電池特性の依存度が前記高出力型組電池よりも高く、前記高出力型組電池に対して車両の上方に重ねて配置されていることを特徴とする車両。 - 車両を走行させる駆動源であるエンジンを有しており、
前記エンジンを停止した状態で前記モータの出力を用いて走行する場合、前記高容量型組電池は、前記高出力型組電池よりも前記モータに電力を供給することを特徴とする請求項1に記載の車両。 - 前記エンジンを停止した状態で前記モータの出力を用いて走行する場合、前記高容量型組電池の使用頻度は、前記高出力型組電池の使用頻度よりも高いことを特徴とする請求項2に記載の車両。
- 前記エンジンを停止した状態で前記モータの出力を用いて走行する場合、前記モータに供給される電力のうち、前記高容量型組電池から前記モータに供給される電力の割合は、前記高出力型組電池から前記モータに供給される電力の割合よりも高いことを特徴とする請求項2に記載の車両。
- 前記高容量型組電池は、外部電源からの電力供給を受けて充電を行うことを特徴とする請求項1から4のいずれか1つに記載の車両。
- 前記高容量型組電池のサイズは、前記高出力型組電池のサイズよりも大きいことを特徴とする請求項1から5のいずれか1つに記載の車両。
- 前記高容量型組電池は、前記高出力型組電池よりも交換頻度が高いことを特徴とする請求項1から6のいずれか1つに記載の車両。
- 前記高出力型組電池は、直列に接続された複数の単電池を有し、
前記高容量型組電池は、並列に接続された複数の単電池を有することを特徴とする請求項1から7のいずれか1つに記載の車両。 - 前記高出力型組電池を含む電池パックは、所定方向に並んで配置された複数の角型単電池と、前記複数の角型単電池を収容するケースとを有しており、
前記高容量型組電池を含む電池パックは、所定平面と直交する方向に延び、前記所定平面内で並んで配置された複数の円筒型単電池と、前記複数の円筒型単電池が挿入される貫通孔を備え、前記各円筒型単電池を支持するホルダと、前記複数の円筒型単電池を収容し、前記ホルダの端面と接触するケースとを有することを特徴とする請求項8に記載の車両。 - 前記高出力型組電池の温度調節に用いられる熱交換媒体は、前記所定方向で隣り合う2つの前記単電池の間に形成されたスペースに進入して、前記高出力型組電池との間で熱交換を行い、
前記高容量型組電池の温度調節に用いられる熱交換媒体は、前記所定平面に沿って移動して、前記高容量型組電池との間で熱交換を行うことを特徴とする請求項9に記載の車両
。
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PCT/JP2011/004835 WO2013030883A1 (ja) | 2011-08-30 | 2011-08-30 | 車両 |
JP2013530874A JP5679064B2 (ja) | 2011-08-30 | 2011-08-30 | 車両 |
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JP5679064B2 (ja) | 2015-03-04 |
CN103733421B (zh) | 2016-05-11 |
EP2752934B1 (en) | 2018-10-17 |
CN103733421A (zh) | 2014-04-16 |
EP2752934A1 (en) | 2014-07-09 |
US20140216842A1 (en) | 2014-08-07 |
US9566853B2 (en) | 2017-02-14 |
JPWO2013030883A1 (ja) | 2015-03-23 |
EP2752934A4 (en) | 2015-02-18 |
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