WO2021065160A1 - 電池モジュールとこの電池モジュールを備える電動車両及び蓄電装置 - Google Patents
電池モジュールとこの電池モジュールを備える電動車両及び蓄電装置 Download PDFInfo
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- WO2021065160A1 WO2021065160A1 PCT/JP2020/028032 JP2020028032W WO2021065160A1 WO 2021065160 A1 WO2021065160 A1 WO 2021065160A1 JP 2020028032 W JP2020028032 W JP 2020028032W WO 2021065160 A1 WO2021065160 A1 WO 2021065160A1
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- battery module
- battery
- electronic circuit
- circuit block
- end plate
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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
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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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
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- H—ELECTRICITY
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- 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
- H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
- H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
- H01M50/222—Inorganic material
- H01M50/224—Metals
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- 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
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
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- H—ELECTRICITY
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- 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
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
- H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
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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
- H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
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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
- H01M50/30—Arrangements for facilitating escape of gases
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- H—ELECTRICITY
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- 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
- H01M50/358—External gas exhaust passages located on the battery cover or case
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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
- H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
- B60L2240/547—Voltage
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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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 in which a plurality of battery cells are connected, an electric vehicle equipped with the battery module, and a power storage device, and is particularly mounted on an electric vehicle such as a hybrid vehicle, a fuel cell vehicle, an electric vehicle, or an electric motorcycle to drive a vehicle.
- the present invention relates to a battery module of a motor, a battery module for supplying power to a power source for a large current used for storage applications for homes and factories, and an electric vehicle and a power storage device provided with the battery module.
- the “battery module” refers to all batteries including a voltage detection circuit in which end plates are arranged on both end surfaces of a plurality of battery cells, a pair of end plates are connected by a bind bar, and the voltage of the battery cells is detected. It is used in a broad sense to include a module, for example, a “battery pack” that does not have a built-in battery control circuit, such as a battery charge / discharge circuit.
- a battery module including a plurality of battery cells is used as a battery module for vehicles such as hybrid vehicles and electric vehicles, and as a power source for power storage systems for factories and households (see, for example, Patent Document 1).
- An example of such a battery module is shown in an exploded perspective view of FIG.
- a plurality of battery cells 901 are laminated to form a battery laminate 902, end plates 903 are arranged on both end faces of the battery laminate 902, and a pair of end plates 903 are bound to a bind bar 904.
- the battery cell 901 is fixed by fastening with.
- Each battery cell 901 has a pair of positive and negative electrode terminals 911 arranged on the terminal surface 910 on the upper surface.
- the positive and negative electrode terminals 911 are electrically connected via the bus bar 914, and the battery cells 901 are connected in series or in parallel.
- a gas duct 905 for guiding the exhaust gas from the exhaust valve 901a on the terminal surface 910 on the upper surface of the battery cell 901 is arranged.
- the gas duct 905 is provided with an inflow hole (not shown) for allowing the exhaust gas ejected from the exhaust valve 901a of each battery cell 901 to flow into the inside.
- a circuit board 906 connected to each battery cell 901 is arranged on the upper surface of the gas duct 905.
- the gas duct is provided to exhaust the high-temperature and high-pressure exhaust gas discharged from the exhaust valve of the battery cell to the outside.
- the exhaust valve opens when the internal pressure rises to the set value to prevent the battery case from exploding. This exhaust valve opens when it detects that the internal pressure of the battery becomes abnormally high, but the internal pressure of the battery cell causes overcharging, overdischarging, and an internal short circuit, resulting in a combustion event inside the battery cell. Is generated and becomes abnormally high, so the exhaust gas becomes high temperature and high pressure.
- the high-temperature and high-pressure exhaust gas ejected from the battery cell has an adverse effect such as burning peripheral members.
- the gas duct is arranged on the terminal surface of the battery cell in order to smoothly exhaust the exhaust gas to the outside, but a circuit board on which electronic components are mounted is also arranged on the terminal surface of the battery cell, and this circuit board is also hot.
- High-pressure exhaust gas has an adverse effect such as burning of the substrate.
- the circuit board also mounts a voltage detection circuit that realizes a battery cell protection circuit, but these electronic components are also adversely affected by high-temperature and high-pressure exhaust gas.
- connectors and lead wires that connect the battery cells to the circuit board are also arranged on the terminal surface of the battery cells, but high-temperature and high-pressure exhaust gas burns the connectors and lead wires, and the heat of combustion of these Causes the battery cells to smoke and ignite in a chain reaction, which reduces safety.
- the exhaust gas is abnormally high temperature and high pressure, it is difficult for the gas duct to completely discharge the gas to the outside.
- the circuit board is separated from the terminal surface of the battery cell by the gas duct, but the exhaust gas leaking from the gas duct may burn the circuit board and further increase the thermal damage. Further, the exhaust gas contains foreign substances such as metal pieces inside the battery cell, which may cause a short-circuit failure of the electronic circuit of the circuit board.
- the battery module is required to be miniaturized as a whole in almost all applications without exception. This is to improve the performance by increasing the charge / discharge capacity with respect to the unit volume.
- the parts arranged on the terminal surface include a gas duct for discharging exhaust gas, an electrode terminal protruding from the terminal surface, a metal plate bus bar for connecting adjacent electrode terminals, and an electronic component.
- the circuit boards to be mounted lead wires connecting the circuit boards and battery cells, and insulating materials for insulating components from high-voltage battery laminates. Many of these components need to be placed so that they do not interfere with each other.
- a battery module in which a large number of parts such as a gas duct, a circuit board, and a lead wire are arranged on the terminal surface of a battery cell cannot be miniaturized by lowering the height of the battery module only by improving the component arrangement.
- the substrate has a detrimental effect of substantially increasing the volume, especially the height, of the battery module.
- the circuit board is made thinner and smaller, the drawback of not being able to efficiently dissipate the thermal energy of the heat-generating components mounted on the circuit board becomes remarkable. Since heat-generating components such as semiconductor elements and discharge resistors are mounted on the circuit board, it is extremely important to efficiently dissipate heat energy and make the temperature rise of the heat-generating components lower than the set temperature.
- the present invention has been developed for the purpose of preventing the above adverse effects, and one of the purposes of the present invention is to protect an electronic circuit block provided with a voltage detection circuit from high-temperature and high-voltage exhaust gas to achieve high safety.
- An object of the present invention is to provide a battery module capable of efficiently dissipating heat from an electronic circuit block, an electric vehicle equipped with the battery module, and a power storage device.
- a battery module includes a battery laminate formed by stacking a plurality of battery cells, a pair of end plates arranged at both ends of the battery laminate in the stacking direction, and a pair of end plates. It is equipped with a bind bar that is connected and fixed to the battery cell, and an electronic circuit block that is equipped with a voltage detection circuit that detects the voltage of the battery cell.
- the electronic circuit block is arranged on the surface of the end plate. There is.
- An electric vehicle includes the battery module, a traveling motor to which power is supplied from the battery module, a vehicle body including the battery module and the motor, and a vehicle body driven by the motor. It is equipped with wheels to run.
- the power storage device includes the above battery module and a power supply controller that controls charging / discharging of the battery module, and the power supply controller enables charging of the battery cell by electric power from the outside. At the same time, the battery cell is controlled to be charged.
- the above battery module protects the electronic circuit block equipped with the voltage detection circuit from high-temperature and high-pressure exhaust gas, realizes high safety, and can efficiently dissipate the electronic circuit block.
- FIG. 5 is an exploded perspective view of the battery module shown in FIG. 1 as viewed from below.
- FIG. 5 is a sectional view taken along line IV-IV of the battery module shown in FIG. It is a top view which shows the end part of the battery module shown in FIG.
- FIG. 5 is a sectional view taken along line VI-VI of the battery module shown in FIG.
- It is a circuit diagram which shows an example of an electronic circuit block. It is an enlarged plane which shows another example of the connection structure of an end plate and an electronic circuit block.
- the battery module of the first embodiment of the present invention includes a battery laminate formed by stacking a plurality of battery cells, a pair of end plates arranged at both ends of the battery laminate in the stacking direction, and a pair of ends.
- a bind bar formed by connecting plates and an electronic circuit block formed by mounting a voltage detection circuit for detecting a voltage of a battery cell are provided, and the electronic circuit block is arranged on the surface of an end plate.
- the above battery module protects the circuit board from high-temperature and high-pressure exhaust gas ejected from the exhaust valve of the battery cell, and can reduce the size of the battery module to increase the charge / discharge capacity with respect to the unit volume.
- the advantage is that the thermal energy of the electronic circuit block to be mounted can be efficiently dissipated to the end plate and the outside, and the temperature rise of the electronic circuit block can be reduced.
- the above structure has a feature that since the electronic circuit block can be arranged on the surface of the end plate in a vertical posture, air can convection smoothly on the surface of the electronic circuit block and heat can be efficiently dissipated.
- the electronic circuit block which is the end plate and is shielded from high-temperature and high-pressure exhaust gas, ensures high safety as a normal operating state even in an abnormal use state of the battery cell in which the exhaust valve is opened.
- the characteristic of being able to efficiently dissipate the heat energy of the electronic circuit block also realizes the feature that the temperature rise can be reduced while the electronic circuit block is miniaturized.
- the temperature rise of the electronic components mounted on the electronic circuit block is also reduced, and the stable operation of the electronic components can be guaranteed.
- a gas duct is arranged so as to face the terminal surface of the battery cell.
- a gas duct having a large gas flow path is arranged on the terminal surface of the battery cell. It has the feature of being able to exhaust high-temperature and high-pressure exhaust gas more quickly.
- the gas duct that allows the exhaust gas to flow smoothly inside also prevents the leakage of the exhaust gas and prevents the harmful effects of the gas leaking out of the duct, that is, the combustion of the connector and lead wire due to the leaked gas. It also realizes the feature of preventing chained smoke and ignition and maintaining high safety.
- the electronic circuit block is not arranged in the vicinity of the gas duct, it is possible to suppress the occurrence of a short-circuit failure of the electronic circuit block due to a foreign substance such as a metal piece contained in the exhaust gas.
- the electronic circuit block is fixed to the outer surface of the end plate in a heat-bonded state.
- the above battery modules have the feature that the heat generation energy of the electronic circuit block can be efficiently conducted to the end plate and the temperature rise of the electronic circuit block can be reduced.
- the end plate since the end plate is required to have a tough structure for fixing a plurality of battery cells, it is heavy and has a large heat capacity, and the amount of heat generated energy absorbed by the electronic circuit block is large. Therefore, the heat energy of the electronic circuit block is efficiently absorbed to reduce the temperature rise.
- the outer shape of the electronic circuit block is smaller than the outer shape of the end plate, and the electronic circuit block is arranged on the surface without protruding from the outer peripheral edge of the end plate.
- the outer circumference of the end plate does not protrude, so that the electronic circuit block does not increase the outer shape of the battery module.
- the end plate is made of metal.
- This battery module has a feature that the thermal energy of the electronic circuit block can be dissipated more efficiently by the metal end plate. This is because the metal end plate has excellent heat conduction characteristics and a large heat capacity, and efficiently absorbs the heat energy of the electronic circuit block and dissipates heat.
- the electronic circuit block is fixed to the end plate in an insulated state.
- the electronic circuit block includes a battery cell equalization circuit.
- the above battery modules can efficiently dissipate heat generated by the end plate of the equalizing circuit of the electronic circuit block, so the equalizing circuit can quickly equalize the battery cells. This is because the power consumption of the equalization circuit can be increased, the battery cell can be discharged with a large current, and the voltage of the high voltage battery cell can be rapidly reduced.
- the equalization circuit discharges the high-voltage battery cell to eliminate the voltage imbalance, or charges the low-voltage battery cell with the high-voltage battery cell to equalize the battery cell.
- the circuit that discharges and equalizes the high-voltage battery cell discharges the high-voltage battery cell with the discharge resistance, and the equalization circuit that charges the low-voltage battery cell with the high-voltage battery cell is the high-voltage battery cell.
- Power is supplied to the low-voltage battery cell to equalize it.
- the discharge resistance that discharges the battery cells and the semiconductor element that controls the discharge current of the discharge resistance generate heat.
- This circuit has a structure that efficiently discharges the discharge resistance and the thermal energy of the semiconductor element, and can shorten the time for equalizing the discharge resistance and the discharge current of the semiconductor element by increasing the discharge current. When the discharge current is increased, the amount of heat generated is also increased, so that the discharge can be efficiently discharged and the discharge current can be increased.
- the semiconductor element that controls the current for charging the low-voltage battery cell to the low-voltage battery cell generates heat.
- the current can be increased to shorten the equalization time.
- the electronic circuit block includes a wireless communication circuit.
- the end plate is integrally provided with a shield convex portion that shields the outer peripheral edge of the electronic circuit block.
- the battery module of the tenth embodiment of the present invention includes a base plate to which an end plate is fixed, the base plate has a bracket protruding from the outer surface of the end plate, and the electronic circuit block has an electronic circuit block in a plan view. The shape does not protrude from the tip edge of the bracket to the outer surface.
- the above battery modules have the electronic circuit block fixed to the end plate, but the outer shape in plan view is not larger than the base plate. Therefore, this battery module has a feature that the electronic circuit block can be arranged at an ideal position while being miniaturized.
- an electronic circuit block fixes a lower portion to a bracket.
- the above battery module has a feature that the electronic circuit block can be securely fixed to the base plate while being miniaturized.
- the bracket has a fixing hole, and the electronic circuit block is arranged at a position different from the fixing hole in a plan view.
- the above battery module has a feature that the base plate can be easily and surely fixed to the equipment to be used while fixing the electronic circuit block to the end plate.
- the electronic circuit block locally fixes a part of the upper edge portion to the end plate and the lower portion to the bracket.
- the deformation does not adversely affect the electronic circuit block.
- expansion of the battery cells deforms the end plate.
- the battery cells expand and the end plate is deformed when charging and discharging are repeated. Since the end plate has bind bars fixed on both sides, the expansion of the battery cell causes the end plate to bend in a centrally convex manner.
- the circuit board is curved and the conductive portion is damaged.
- the battery module since a part of the upper edge portion of the electronic circuit block is locally fixed to the end plate, the battery module does not deform together even if the end plate is curved. Further, since the lower part of the electronic circuit block is fixed to the bracket of the base plate, the upper part and the lower part are securely fixed. That is, the electronic circuit block is firmly fixed to the end plate and the base plate without being adversely affected by the deformation of the end plate.
- the electronic circuit block is locally fixed to the end plate.
- the electronic circuit block is fixed to the surface of the end plate via a rubber-like elastic body.
- the electronic circuit block is fixed to the end plate via a rubber-like elastic body, so that the electronic circuit block can be securely fixed to the end plate while preventing adverse effects due to deformation of the end plate. Further, the electronic circuit block can be brought into close contact with the end plate over a wide area via the rubber-like elastic body, and the electronic circuit block and the end plate can be fixed in a preferable thermal coupling state to improve the heat dissipation characteristics of the electronic circuit block.
- the battery modules shown in the following examples are mainly suitable for powering electric vehicles such as hybrid cars and plug-in hybrid cars that run on both an engine and a motor, electric vehicles that run only on a motor, and electric bikes that run on a motor. Is.
- the battery module of the present invention is also suitable as a power source for a power storage device other than an electric vehicle, which requires a large output.
- the battery modules shown in FIGS. 1 to 6 are a pair of a battery laminate 2 in which a plurality of battery cells 1 are laminated in the thickness direction and a pair arranged at both ends of the battery stack 2 in the stacking direction.
- the battery module shown in the figure is above the gas duct 5 connected to the exhaust valve 1a of each battery cell 1 and exhausting the exhaust gas ejected from the exhaust valve 1a to the outside, and above the battery laminate 2. It includes a top cover 8 arranged above the gas duct 5 and a base plate 9 arranged below the battery laminate and fixing the end plate 3.
- the battery cell 1 is a square secondary battery having a width wider than the thickness, in other words, a square secondary battery thinner than the width, and is laminated in the thickness direction to form a battery laminate 2.
- the battery cell 1 is a lithium ion secondary battery.
- the battery cell can be any other rechargeable secondary battery, such as a nickel metal hydride battery or a nickel cadmium battery.
- positive and negative electrode plates are housed together with an electrolytic solution in an outer can having a closed structure.
- the outer can is made by press-molding a metal plate such as aluminum or an aluminum alloy into a square shape, and the opening is hermetically sealed with a sealing plate.
- the sealing plate is made of the same aluminum or aluminum alloy as the outer can, and the positive and negative electrode terminals 11 are fixed, and an exhaust valve is provided between the electrode terminals 11.
- the positive and negative electrode terminals 11 are in a state in which at least one of the electrode terminals 11 is insulated from the sealing plate.
- the battery cell 1 is provided with positive and negative electrode terminals 11 with the sealing plate as the terminal surface 10. Further, in the battery cell 1, the bottom surface and the side surface of the outer can are covered with an insulating film.
- the plurality of battery cells 1 are laminated so that the thickness direction of each battery cell 1 is the stacking direction to form the battery laminate 2.
- one outer peripheral surface of a quadrangle is used as a terminal surface 10 provided with positive and negative electrode terminals 11, the terminal surfaces 10 are arranged on the same plane, and a plurality of battery cells 1 are laminated to form a battery laminate 2. It is supposed to be.
- the battery laminate 2 has an insulating spacer 12 sandwiched between the stacked battery cells 1.
- the insulating spacer 12 in the figure is made of an insulating material such as resin in the form of a thin plate or sheet.
- the insulating spacer 12 shown in the figure has a plate shape having a size substantially equal to the facing surface of the battery cell 1, and the insulating spacer 12 is laminated between the battery cells 1 adjacent to each other so that the adjacent battery cells 1 are connected to each other. Insulated.
- a spacer having a shape in which a flow path of a cooling gas is formed between the battery cell and the spacer can also be used.
- a metal bus bar 14 is connected to the positive and negative electrode terminals 11 of the adjacent battery cells 1, and a plurality of battery cells 1 are connected in series or in parallel, or in series and in parallel by the bus bar 14. ing.
- the output voltage and the capacity that can be charged and discharged are set values depending on the number of battery cells 1 to be stacked.
- the output voltage can be increased by the number of battery cells 1 connected in series, and the charge / discharge capacity can be increased by the number of battery cells 1. Since the output voltage and capacity of the battery module are set as the set values of the number of battery cells 1 constituting the battery laminate 2 and the connected state connected in parallel with the number of battery cells 1, the number of battery cells 1 and the connected state are used. It is considered to be in the optimum state.
- the bus bar 14 is provided with a connection portion (not shown) for connecting to the electrode terminal 11.
- the bus bar 14 is connected by irradiating a boundary connecting the connection portion and the electrode terminal 11 with a laser beam and welding the connection portion to the electrode terminal 11.
- the bus bar is provided with a male screw on the electrode terminal to open a through hole for inserting the electrode terminal, and a nut is screwed into the male screw of the electrode terminal inserted through the through hole to connect to the electrode terminal.
- the electrode terminal may be provided with a female screw hole, and a set screw penetrating the bus bar may be screwed into the female screw hole to connect to the electrode terminal.
- the battery module may be provided with a resin insulating cover (not shown) on the upper surface of the battery laminate 2.
- the insulating cover is provided with an opening, and the electrode terminal 11 is exposed from the opening, and a metal plate bus bar 14 is connected to the electrode terminal 11 exposed from the opening of the insulating cover on the upper surface side of the insulating cover.
- a plurality of battery cells 1 can be connected in a predetermined arrangement.
- End face spacer 13 In order to insulate the battery laminate 2 from the metal end plate 3, the end plates 3 can be arranged on both end faces with the end face spacers 13 interposed therebetween.
- the end face spacer 13 is arranged between the battery laminate 2 and the end plate 3 to insulate the end plate 3 from the battery laminate 2.
- the end face spacer 13 is made of an insulating material such as resin in the form of a thin plate or sheet.
- the end face spacer 13 is provided with a plate portion having a size capable of covering the entire facing surface of the battery cell 1, and this plate portion is laminated between the battery cell 1 and the end plate 3 arranged at both ends of the battery laminate 2. doing.
- End plate 3 The end plates 3 are on both end faces of the battery stack 2 in the stacking direction of the battery cells 1 and fix the battery stack 2.
- the end plate 3 is a metal plate, and is a quadrangular plate whose outer shape is substantially equal to the outer shape of the battery cell 1 or slightly larger than that of the battery cell 1.
- the end plate 3 can be manufactured of a high-strength rope to have a tough structure.
- the end plate 3 may be a single metal plate, a structure in which a plurality of metal plates are laminated, or a laminate of a metal plate and plastic.
- the end plate 3 made of one metal plate has a large heat capacity and can efficiently absorb the heat energy of the electronic circuit block 6.
- the end plate in which a plurality of plate materials are laminated is made of a metal plate material having a small surface side for fixing the electronic circuit block. This is because the electronic circuit block is fixed in the heat-coupled state and the heat dissipation characteristics are improved.
- the end plate may have a laminated structure of an aluminum plate and a high-strength rope plate. This end plate has a structure in which an electronic circuit block is fixed with the surface side as an aluminum plate, and the aluminum plate and the high-strength rope plate are laminated in a surface contact state so that heat can be efficiently conducted from the aluminum plate to the high-tensile rope plate. You can also do it.
- the end plate is not necessarily made of metal, but may be made of plastic having excellent strength such as engineering plastic.
- the bind bar 4 extends in the stacking direction of the battery cells 1 and fixes both ends thereof to the end plates 3, and the battery stack 2 is fixed by the pair of end plates 3.
- the bind bar 4 is a metal plate having a predetermined vertical width and a predetermined thickness along the side surface of the battery laminate 2, and is arranged so as to face both side surfaces of the battery laminate 2.
- the bind bar 4 presses both end surfaces of the battery laminate 2 with a strong pressure to charge and discharge the battery cell 1 to expand, and arranges the battery cells 1 at a fixed position.
- a high-strength rope is preferably used as the metal plate of the bind bar 4, a high-strength rope is preferably used.
- the bind bar 4 of the metal plate is press-molded to form a predetermined shape.
- the bind bar 4 has end plates 3 at both ends of the battery laminate 2 in the stacking direction in order to fix both ends to the pair of end plates 3.
- the fixing portion 4A is provided by bending along the outer surface of the above.
- the bind bar 4 fastens the pair of end plates 3 by screwing the fixing portion 4A into the end plate 3.
- the bind bar 4 is formed by bending the lower end portion into an L shape to form the lower connecting piece 4B.
- the lower connecting piece 4B is laminated on the lower surface side of both side portions of the base plate and connected to the base plate.
- the bind bar 4 is formed by bending the upper end portion to form a pressing piece 4C that presses the upper end portion of the upper surface of the battery laminate 2.
- the pressing piece 4C is separated for each battery cell 1 so that the upper surface of the battery cell 1 of the battery stack 2 can be individually pressed. As a result, each pressing piece 4C can press the battery cell 1 toward the base plate 9 independently of the adjacent pressing piece 4C.
- each battery cell 1 is prevented from rising from the base plate 9 and held in the height direction, and even if vibration, impact, or the like is applied to the battery laminate 2, each battery cell 1 is positioned in the vertical direction. It can be maintained so that it does not shift.
- the bind bar 4 covers and holds the corners of the upper and lower surfaces of the battery laminate 2 on both the left and right sides of the battery laminate 2.
- both ends of the bind bar may be formed into a flat plate shape without being bent into an L shape, and may be configured to be screwed with the side surface of the end plate.
- an engaging structure in which the portion of the bind bar facing the side surface of the end plate is engaged in a stepped shape as a structure in which the bind bar is further screwed in a state of being locked to the side surface of the end plate with a locking structure. May be good.
- an insulating sheet may be interposed between the bind bar 4 and the battery laminate 2.
- the insulating sheet is made of a material having an insulating property, for example, resin, and insulates between the metal bind bar 4 and the battery cell 1.
- the base plate 9 is arranged on the bottom surface of the battery laminate 2 and the end plate 3 as shown in FIGS. 4 and 6.
- the end plate 3 is fixed to the base plate 9, and more preferably, the lower end portion of the bind bar 4 is also fixed to the base plate 9.
- the end plate 3 and the bind bar 4 are fixed to the base plate 9 via the fixing screws 15 and 16.
- the fixing screw 15 for fixing the end plate 3 penetrates the end plate 3 in the vertical direction and fixes the end plate 3 to the base plate 9.
- the fixing screw 16 for fixing the bind bar 4 also penetrates the lower connecting piece 4B which is the lower end portion of the bind bar 4 and is fixed to the base plate 9.
- the base plate 9 is provided with brackets 17 at both ends for fixing the battery module 100 to a mounting device such as a vehicle. As shown in FIGS. 5 and 6, the bracket 17 is provided so as to project outward from the end plate 3.
- the bracket 17 has a fixing hole 17A for inserting a set screw (not shown), and is fixed to the chassis of a vehicle, which is a mounting device, via the set screw.
- the set screw penetrates the bracket 17 and is screwed into the chassis of the vehicle or the like to fix the battery module 100 in place.
- the battery laminate 2 is arranged in a heat-bonded state with the base plate 9 by bringing each battery cell 1 into contact with the base plate 9.
- the base plate 9 can be forcibly cooled to dissipate the heat energy of the battery cell 1 more efficiently.
- the base plate 9 to be forcibly cooled can be forcibly cooled by circulating a refrigerant or a coolant inside.
- the base plate can be forcibly cooled by providing heat radiation fins on the lower surface.
- a cooling plate can be laminated on the lower surface of the base plate in a surface contact state, and forced cooling can be performed by the cooling plate.
- the cooling plate can be forcibly cooled by circulating a refrigerant or a coolant inside.
- the gas duct 5 is arranged on the upper surface of the battery cell 1, that is, at a position facing the terminal surface 10 of the battery cell 1.
- the gas duct 5 has a tubular shape having an internal volume that smoothly discharges the discharged material discharged from the opening of the exhaust valve 1a, opens the lower surface, and is connected to the opening of the exhaust valve 1a of each battery cell 1. There is.
- the gas duct 5 is formed on the upper surface of the battery laminate 2 so that the exhaust gas discharged from the exhaust valve 1a is exhausted to the outside so that there is no gap between the gas duct 5 and the terminal surface 10 of the battery cell 1.
- An opening 5a that is arranged in close contact with the upper surface and opens on the lower surface is connected to the exhaust valve 1a of each battery cell 1.
- the gas duct 5 may be arranged so that exhaust gas does not leak by arranging a packing, a sealing material, or the like between the gas duct 5 and the terminal surface 10.
- the gas duct is a collecting duct arranged on the upper surface of the battery stacking body in a posture extending in the stacking direction of the battery cells, and a branch duct connected to the collecting duct and the tip is connected to the exhaust valve. It can also be configured with.
- the collecting duct can be arranged away from the terminal surface, and the tip of the branch duct can be connected to the opening of the exhaust valve.
- the electronic circuit block 6 includes a voltage detection circuit 22 that is connected to each battery cell 1 via a lead wire to detect the voltage of the battery cell 1.
- the electronic circuit block 6 mounts an electronic component that realizes the voltage detection circuit 22 on a circuit board 20 (see FIGS. 5 and 6).
- the electronic circuit block 6 may be a block in which all the electronic circuits including the voltage detection circuit 22 are integrated circuits and the integrated circuits are embedded in a package of an insulating material.
- the electronic circuit block 6 can be a block in which the metal plate of the radiator 21 is arranged on the surface.
- the radiator 21 is thermally coupled to a heat-generating component built in the electronic circuit block 6, for example, a semiconductor element such as a FET that controls the discharge resistance and current of the equalization circuit, and externally transfers the thermal energy of these heat-generating components. To dissipate heat.
- the electronic circuit block 6 has an electronic component mounted on a circuit board 20 to form a plate shape as a whole, or an integrated circuit embedded in a package to form a plate shape.
- the electronic circuit block 6 provided with the voltage detection circuit 22 detects the voltage of the battery cells 1 whose voltage fluctuates due to charging and discharging, and prevents overcharging and overdischarging of each battery cell 1.
- the battery module may include a control circuit 30 that controls the charge / discharge current of the battery stack 2.
- the control circuit 30 controls the charging / discharging current to prevent overcharging and overdischarging of the battery cell 1.
- the voltage detection circuit 22 transmits the voltage data of the battery cell 1 to the control circuit 30.
- the voltage detection circuit 22 preferably detects the voltage of all the battery cells 1. However, the voltage detection circuit 22 does not necessarily detect the voltage of all the battery cells 1.
- the battery cell 1 constituting the battery laminate 2 is divided into a plurality of battery units, and the voltage of each battery unit 1 is divided. Can also be detected.
- a battery unit in which a plurality of battery cells 1 are connected in parallel can detect the voltage of the battery unit and detect the voltage of all the battery cells.
- the battery unit in which a plurality of battery cells are connected in series detects the voltage of the battery unit and detects the total voltage of the battery cells connected in series.
- a battery unit in which a plurality of battery cells are connected in series is composed of 2 to 5 battery cells.
- this battery unit detects the voltage of the battery unit and detects the total voltage of 2 to 5 battery cells 1, the voltage of the battery cells is 1/2 to 1/5 of the detected total voltage.
- the voltage of the battery cell 1 changes with the remaining capacity.
- the voltage of the battery cell 1 becomes higher than the preset maximum voltage when it is overcharged, and becomes lower than the minimum voltage when it is overdischarged.
- the voltage detection circuit 22 detects the voltage of the battery cell 1 and transmits it to the control circuit, and the control circuit controls the charging / discharging current so that the voltage of the battery cell 1 is within the set range.
- each battery cell 1 becomes unbalanced as charging and discharging are repeated.
- the battery cells 1 connected in series are charged and discharged with the same current. Although they are charged and discharged with the same current, the electrical characteristics of each battery cell 1 are not completely the same. Therefore, even in a battery module in which a plurality of battery cells 1 are connected in series, the voltage of each battery cell 1 becomes unbalanced.
- An imbalance in the battery cell 1 causes the specific battery cell 1 to be overcharged or overdischarged. Since the battery module charges and discharges all the battery cells 1 at the same time, the imbalance of the battery cells 1 causes the specific battery cells 1 to be overcharged or overdischarged. Overcharging and overdischarging of the battery cell 1 deteriorates the electrical characteristics of the battery cell 1 and causes deterioration, and also reduces the safety of the battery module.
- the equalization circuit 23 eliminates the imbalance in the voltage of the battery cell 1.
- the electronic circuit block 6 also mounts an equalization circuit 23 that equalizes the voltage of the battery cell 1.
- the equalization circuit 23 equalizes the voltage of the battery cell 1 and eliminates the imbalance.
- An example of the circuit diagram of the equalization circuit 23 is shown in FIG.
- the equalization circuit 23 shown in this figure discharges the battery cell 1 having a high voltage with the discharge resistor 25 to eliminate the imbalance.
- the equalization circuit is not specified as a circuit that discharges a battery with a discharge resistor.
- the equalization circuit discharges a high-voltage battery cell into a capacitor, a storage battery, or other storage device to store the battery in the storage device, and discharges the charge of the storage device to a low-voltage battery cell to discharge the voltage difference between the battery cells. Can also be eliminated.
- the equalization circuit can also convert the voltage of a high voltage battery cell with a DC / DC converter and charge the low voltage battery cell while controlling the current to equalize the voltage.
- the equalization circuit 23 of FIG. 7 includes a discharge circuit 24 in which a switching element 26 is connected in series to the discharge resistor 25, detects each cell voltage, and controls the switching element 26 to be ON / OFF. 27 is connected to a voltage detection circuit 22 that detects the cell voltage of each battery cell 1.
- the discharge resistor 25 and the discharge circuit 24 of the switching element 26 are connected in parallel with each battery cell 1.
- the equalization circuit 23 switches the switching element 26 to ON by the control circuit 27, discharges the battery cell 1 with the discharge resistor 25, and charges the voltage of the battery cell 1. Decrease and equalize.
- the equalization circuit 23 is driven by receiving electric power from the battery laminate 2.
- the equalization circuit 23 in the figure is operated by the output voltage (Vcc) of the power supply circuit 28 that receives power from the battery stack 2.
- the voltage of the battery laminate 2 can be stepped down by, for example, a DC / DC converter which is a power supply circuit 28, and supplied to the equalization circuit 23. According to this circuit configuration, even if the voltage of the battery laminate 2 is high, it can be supplied to the equalization circuit 23 as an optimum voltage.
- the control circuit 27 compares the cell voltages of the respective battery cells 1 and controls the switching element 26 so as to equalize the cell voltages of all the battery cells 1.
- the control circuit 27 switches the switching element 26 of the discharge circuit 24 connected to the battery cell 1, which is too high, to ON to discharge the battery.
- the voltage of the battery cell 1 decreases as it is discharged.
- the switching element 26 is switched from ON to OFF when the voltage of the battery cell 1 drops until it is balanced with the other battery cells 1.
- the control circuit 27 discharges the battery cell 1 having a high cell voltage to balance the cell voltages of all the battery cells 1.
- the above equalization circuit 23 equalizes the voltages of all the battery cells 1, but the battery module divides all the battery cells into a plurality of battery units and equalizes the voltages of the battery cells constituting the battery units. After equalizing with the equalization circuit, the voltage of the entire battery unit can be equalized with the unit equalization circuit.
- the unit equalization circuit detects the unit voltage of each battery unit, discharges the battery unit having a high unit voltage, and equalizes the voltage of each battery unit.
- the electronic circuit block 6 is fixed to the end plate 3 and dissipates heat to the end plate 3.
- the electronic circuit block 6 includes a semiconductor element such as an FET that controls a current and a heat generating element such as a discharge resistor.
- the electronic circuit block 6 can dissipate the heat energy of the heat generating element to the end plate 3 to reduce the temperature rise.
- the temperature rise of the electronic circuit block 6 adversely affects the built-in heat generating element and the like.
- the equalization circuit 23 discharges the battery cell 1 with the discharge resistor 25 to lower the voltage, but the discharge resistor 25 generates heat due to the Joule heat of the discharge current.
- the discharge resistor 25 can increase the current and quickly reduce the voltage of the battery cell 1 in a short time, but the Joule heat that heats the discharge resistor 25 increases in proportion to the square of the discharge current, so that the voltage can be rapidly reduced.
- the equalization circuit 23, which can reduce the voltage of the battery cell 1 to shorten the equalization time, generates a large amount of heat energy. Since the equalization circuit 23 equalizes the battery cells 1 at the timing when the battery cells 1 are not charged and discharged, the equalization time is required to be shorter. Since the reduction of the equalization time can be realized by increasing the current of the discharge resistor 25, how efficiently the heat generation energy of the discharge resistor 25 can be dissipated is an important factor for specifying the equalization time.
- the temperature rise due to the heat generation energy of the heat-generating parts leads to the failure of the parts, it is designed to increase the overall temperature so that the heat-generating parts do not rise abnormally, or to reduce the amount of heat generated per unit time such as discharge resistance. Will be done.
- the electronic circuit block 6 is miniaturized so that it can be arranged in a narrow space, the heat radiation area is reduced, the heat radiation energy is reduced, and the temperature rise is large.
- an electronic circuit block that has been miniaturized so that it can be arranged in a small space between a gas duct and a bus bar, such as a conventional battery module has a small heat dissipation area, so that it is necessary to reduce heat dissipation energy.
- the electronic circuit block arranged in a narrow space needs to reduce the heat radiation energy, and the time for equalizing the battery cells becomes long.
- Battery modules in which a large number of battery cells are stacked are used for large-capacity applications such as battery modules for driving vehicle motors and power storage devices, so the capacity of battery cells is also considerable. large.
- the capacity imbalance due to the battery cell voltage imbalance increases relatively as the battery cell capacity increases. Therefore, this type of battery module is capable of increasing the discharge current because the equalization time of the battery cells is shortened as much as possible and equalized quickly, but the increase in the discharge resistance increases the heat generation energy. Therefore, it is required to increase the heat dissipation area.
- the electronic circuit block is required to be miniaturized in order to be arranged in a narrow space, and it is necessary to increase the heat dissipation area and increase the size in order to discharge with a large current and shorten the equalization time. For this reason, in the electronic circuit block, miniaturization and shortening of the equalization time are mutually contradictory characteristics, and both characteristics cannot be satisfied, and the miniaturization required for arranging in a limited space is achieved. However, there is a need for issues that contradict the increase in size in order to have high discharge capacity.
- a battery module in which the electronic circuit block 6 is fixed to the end plate 3 in a heat-coupled state and the end plate 3 is used for heat dissipation of the electronic circuit block 6 can efficiently dissipate the heat generated energy of the electronic circuit block 6 at the end plate 3. ..
- the end plate 3 has an extremely large heat capacity, a small temperature rise with respect to the heat energy to be absorbed, and the equalization time of the battery cell 1 can be shortened.
- the end plate 3 has a large surface area and a large amount of heat radiation energy from the surface, which also makes the temperature rise small. Further, in the structure in which the end plate 3 is fixed to the base plate 9, heat energy is conducted from the end plate 3 to the base plate 9, and the temperature rise is further reduced.
- the end plate 3 is forcibly cooled by the base plate 9, the temperature rise is further reduced, and the cooling effect of the electronic circuit block 6 is further increased. Therefore, the temperature rise of the electronic circuit block 6 is reduced to an ideal state.
- the electronic circuit block 6 is fixed to the outer surface of the end plate 3.
- the battery module 100 has a feature that heat generation energy of the electronic circuit block 6 can be conducted to the end plate 3 fixed to the end plate 3 to dissipate heat, and heat can be dissipated from the exposed surface to the outside air more efficiently.
- the outer shape of the electronic circuit block 6 fixed to the surface of the end plate 3 is smaller than the outer shape of the end plate 3, and does not protrude from the outer peripheral edge of the end plate 3. In the battery module 100, while the electronic circuit block 6 is arranged on the end plate 3, the electronic circuit block 6 does not increase the outer shape of the battery module 100, and the electronic circuit block 6 can efficiently dissipate heat while being miniaturized.
- the thickness of the electronic circuit block 6 is set so as not to protrude from the tip edge of the bracket 17 of the base plate 9 to the outer surface in a plan view.
- the outer shape in a plan view is not larger than that of the base plate 9, and the electronic circuit block 6 can be arranged at an ideal position while reducing the overall size.
- the end plate 3 is pressed from the inside with a strong pressure by the battery cell 1 which shows physical properties that expand when charged and discharged.
- the end plate 3 which is pressed by the battery laminate 2 and whose both side edges are fixed by the bind bar 4 is curved by the pressure of the battery laminate 2. If the electronic circuit block 6 is deformed by the curved end plate 3, the components of the electronic circuit block 6 are adversely affected. For example, in the electronic circuit block 6 in which electronic components are fixed to the circuit board, adverse effects such as bending of the circuit board and damage to the conductive portion occur.
- a part of the upper edge portion preferably the central portion, is locally fixed to the end plate 3, and the lower portion is fixed to the bracket 17.
- the deformation does not adversely affect the electronic circuit block 6.
- a part of the upper edge portion of the electronic circuit block 6 is locally fixed to the end plate 3, so that the battery module 100 does not deform together even if the end plate 3 is curved.
- the lower portion of the electronic circuit block 6 is fixed to the bracket 17 of the base plate 9, the upper portion and the lower portion are securely fixed to each other. That is, the electronic circuit block 6 is firmly fixed to the end plate 3 and the base plate 9 without being adversely affected by the deformation of the end plate 3.
- the battery module 100 for fixing the electronic circuit block 6 to the bracket 17 of the base plate 9 fixes the electronic circuit block 6 to the end plate 3 by arranging the electronic circuit block 6 at a position different from the fixing hole 17A in a plan view.
- the battery module 100 of FIG. 5 is provided with fixing holes 17A on both sides of the bracket 17 so as to have a width that can be arranged inside the fixing holes 17A of the bracket 17.
- the electronic circuit block 6 is preferably insulated and fixed to the end plate 3.
- the electronic circuit block 6 is fixed by arranging an insulating sheet 18 between the electronic circuit block 6 and the end plate 3.
- the insulating sheet 18 is an elastic sheet made of a rubber-like elastic body, and can always hold the curved end plate 3 and the electronic circuit block 6 in a heat-bonded state.
- the electronic circuit block 6 insulated and fixed to the end plate 3 is a battery laminate arranged inside the end plate 3 while having a structure in which a metal radiator 21 or the like is exposed on the surface to efficiently dissipate heat. Insulation characteristics can be improved with respect to 2, and reliability can be improved.
- the battery module 100 in which the end plates 3 are arranged on both end surfaces of the battery laminate 2 can prevent electric shock and electric leakage by insulating the end plates 3 from the ground line.
- the end plate 3 insulated from the ground line has a high-voltage battery laminate 2 arranged inside.
- the end plate 3 insulated from the battery laminate 2 has a high leakage resistance with the battery laminate 2, but the leakage resistance may decrease due to various factors. For example, dew condensation water between the end plate 3 and the battery laminate 2 causes a decrease in leakage resistance.
- the electronic circuit block 6 insulated from the end plate 3 is insulated from the end plate 3 even if the contact resistance between the end plate 3 and the battery laminate 2 decreases, thereby preventing adverse effects such as electric leakage and electric shock. To ensure high safety and reliability. However, since the end plate is insulated from the battery laminate, the end plate can also be connected to the ground line.
- the above battery module 100 has a feature that the heat generating component of the equalization circuit 23 of the electronic circuit block 6 can be efficiently dissipated by the end plate 3, so that the battery cell 1 can be quickly equalized by the equalization circuit 23. This is because the power consumption of the equalization circuit 23 can be increased, the battery cell 1 can be discharged with a large current, and the voltage of the high voltage battery cell 1 can be quickly reduced.
- the equalization circuit 23 discharges the high-voltage battery cell 1 to eliminate the voltage imbalance, or charges the low-voltage battery cell 1 with the high-voltage battery cell 1 to equalize the battery cell 1.
- the circuit that discharges and equalizes the high-voltage battery cell 1 discharges the high-voltage battery cell 1 with the discharge resistance 25, and the equalization circuit 23 that charges the low-voltage battery cell 1 with the high-voltage battery cell 1 , Power is supplied from the high voltage battery cell 1 to the low voltage battery cell 1 to equalize.
- the discharge resistance 25 that discharges the battery cell 1 and the semiconductor element that is the switching element 26 that controls the discharge current of the discharge resistance 25 generate heat.
- This circuit has a structure that efficiently discharges the heat energy of the discharge resistor 25 and the semiconductor element, and can shorten the time for equalizing the discharge current of the discharge resistor 25 and the semiconductor element by increasing the discharge current.
- the semiconductor element that controls the charging current from the high-voltage battery cell to the low-voltage battery cell generates heat. The current can be increased to shorten the equalization time.
- the electronic circuit block 6 fixed to the end plate 3 is provided with a wireless communication circuit 31, and information such as a battery voltage detected by the voltage detection circuit 22 by the wireless communication circuit 31 is provided. Can be wirelessly transmitted to the central control circuit 30.
- the electronic circuit block 6 does not need to be connected to the central control circuit 30 with a lead wire, and has a feature that wiring can be easily performed.
- the electronic circuit block 6 can wirelessly transmit information to the central control circuit 30 that controls the traveling motor of the vehicle.
- the battery module having this structure simplifies the complicated wire harness peculiar to the vehicle, prevents the wire harness from having unavoidable adverse effects such as poor contact, and can realize high reliability for a long period of time.
- the electronic circuit block 6 provided with the wireless communication circuit 31 is required to have a characteristic of eliminating a transmission error due to external noise.
- the metal end plate 3 can shield the surface of the electronic circuit block 6 to reduce the influence of external noise.
- the wireless communication circuit 31 can wirelessly transmit information stably and accurately in the end plate 3 provided with the shield convex portion 32 that shields the outer peripheral edge of the electronic circuit block 6 in an integrated structure. Furthermore, by connecting the end plate to the ground line, the shielding effect can be improved and the influence of external noise can be reduced.
- the above battery module can be used as a power source for a vehicle that supplies electric power to a motor that runs an electric vehicle.
- an electric vehicle equipped with a battery module an electric vehicle such as a hybrid vehicle or a plug-in hybrid vehicle that runs on both an engine and a motor, or an electric vehicle that runs only on a motor can be used, and is used as a power source for these vehicles.
- an electric vehicle equipped with a battery module an electric vehicle such as a hybrid vehicle or a plug-in hybrid vehicle that runs on both an engine and a motor, or an electric vehicle that runs only on a motor can be used, and is used as a power source for these vehicles.
- FIG. 9 shows an example in which a battery module is mounted on a hybrid vehicle that runs on both an engine and a motor.
- the vehicle HV equipped with the battery module shown in this figure includes a vehicle main body 91, an engine 96 for running the vehicle main body 91, a running motor 93, and wheels driven by these engines 96 and a running motor 93. It includes 97, a battery module 100 that supplies power to the motor 93, and a generator 94 that charges the battery of the battery module 100.
- the battery module 100 is connected to the motor 93 and the generator 94 via the DC / AC inverter 95.
- the vehicle HV runs on both the motor 93 and the engine 96 while charging and discharging the battery of the battery module 100.
- the motor 93 is driven to drive the vehicle in a region where the engine efficiency is poor, for example, during acceleration or low speed travel.
- the motor 93 is driven by being supplied with electric power from the battery module 100.
- the generator 94 is driven by the engine 96 or by regenerative braking when braking the vehicle to charge the battery of the battery module 100.
- the vehicle HV may be provided with a charging plug 98 for charging the battery module 100. By connecting the charging plug 98 to an external power source, the battery module 100 can be charged.
- FIG. 10 shows an example in which a battery module is mounted on an electric vehicle that travels only by a motor.
- the vehicle EV equipped with the battery module shown in this figure supplies power to the vehicle main body 91, the traveling motor 93 for running the vehicle main body 91, the wheels 97 driven by the motor 93, and the motor 93.
- the battery module 100 and the generator 94 for charging the battery of the battery module 100 are provided.
- the battery module 100 is connected to the motor 93 and the generator 94 via the DC / AC inverter 95.
- the motor 93 is driven by being supplied with electric power from the battery module 100.
- the generator 94 is driven by the energy used for regenerative braking of the vehicle EV to charge the battery of the battery module 100.
- the vehicle EV is provided with a charging plug 98, and the charging plug 98 can be connected to an external power source to charge the battery module 100.
- the present invention does not specify the use of the battery module as a power source for a motor that runs a vehicle.
- the battery module according to the embodiment can also be used as a power source for a power storage device that charges and stores a battery with electric power generated by solar power generation, wind power generation, or the like.
- FIG. 11 shows a power storage device that charges and stores the battery of the battery module 100 with the solar cell 82.
- the power storage device shown in FIG. 11 charges the battery of the battery module 100 with the electric power generated by the solar cell 82 arranged on the roof or roof of a building 81 such as a house or a factory.
- This power storage device uses the solar cell 82 as a power source for charging, charges the battery of the battery module 100 in the charging circuit 83, and then supplies electric power to the load 86 via the DC / AC inverter 85. Therefore, this power storage device has a charge mode and a discharge mode.
- the DC / AC inverter 85 and the charging circuit 83 are connected to the battery module 100 via the discharge switch 87 and the charging switch 84, respectively.
- the ON / OFF of the discharge switch 87 and the charge switch 84 is switched by the power controller 88 of the power storage device.
- the power controller 88 switches the charging switch 84 to ON and the discharge switch 87 to OFF to allow the charging circuit 83 to charge the battery module 100.
- the power controller 88 turns off the charging switch 84 and turns on the discharge switch 87 to switch to the discharge mode, and the battery module 100 Allows discharge from to load 86.
- the charge switch 84 can be turned on and the discharge switch 87 can be turned on to supply power to the load 86 and charge the battery module 100 at the same time.
- the battery module can also be used as a power source for a power storage device that charges and stores batteries using midnight power at night.
- a battery module charged with midnight power can be charged with midnight power, which is surplus power of a power plant, and output power in the daytime when the power load is large, so that the peak power in the daytime can be limited to a small value.
- the battery module can also be used as a power source for charging with both solar cell output and midnight power. This battery module can effectively utilize both the power generated by the solar cell and the midnight power, and can efficiently store electricity while considering the weather and power consumption.
- the above-mentioned power storage devices include backup battery modules that can be mounted in computer server racks, backup battery modules for wireless base stations such as mobile phones, power storage power supplies for homes or factories, power supplies for street lights, etc. It can be suitably used for power storage devices combined with solar cells, backup power sources for traffic lights and road traffic indicators, and the like.
- the battery module according to the present invention can be suitably used as a battery module for a plug-in hybrid electric vehicle, a hybrid electric vehicle, an electric vehicle, etc. that can switch between an EV driving mode and an HEV driving mode.
- a backup battery module that can be mounted in a computer server rack, a backup battery module for wireless base stations such as mobile phones, a power storage device for home use and factories, a power supply for street lights, etc. , Can also be used as appropriate for backup power supplies such as traffic lights.
- Battery module 901 ... Battery cell, 901a ... Exhaust valve, 902 ... Battery laminate, 903 ... End plate, 904 ... Bind bar, 905 ... Gas duct, 906 ... Circuit board, 910 ... Terminal surface, 911 ... Electrode terminal, 914 ... Bus bar, HV, EV ... Vehicle
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Abstract
Description
本明細書において「電池モジュール」は、複数の電池セルの両端面にエンドプレートを配置して一対のエンドプレートをバインドバーで連結し、電池セルの電圧を検出する電圧検出回路を備える全ての電池モジュール、たとえば電池の充放電回路等、電池の制御回路を内蔵しない「電池パック」等を含む広い意味に使用する。
(例えば特許文献1参照)。
このような電池モジュールの一例を図12の分解斜視図に示す。この図に示す電池モジュール900は、複数の電池セル901を積層して電池積層体902とし、この電池積層体902の両端面にエンドプレート903を配置して、一対のエンドプレート903をバインドバー904で締結して電池セル901を固定している。各電池セル901は、正負一対の電極端子911を上面の端子面910に配置している。正負の電極端子911はバスバー914を介して電気的に接続して、電池セル901を直列や並列に接続している。
さらに以下に示す実施形態は、本発明の技術思想の具体例を示すものであって、本発明を以下に限定するものではない。また、以下に記載されている構成部品の寸法、材質、形状、その相対的配置等は、特定的な記載がない限り、本発明の範囲をそれのみに限定する趣旨ではなく、例示することを意図したものである。また、一の実施の形態、実施例において説明する内容は、他の実施の形態、実施例にも適用可能である。また、図面が示す部材の大きさや位置関係等は、説明を明確にするため、誇張していることがある。
この電池モジュールは、金属製のエンドプレートによって電子回路ブロックの熱エネルギーをより効率よく放熱できる特長がある。それは、金属製のエンドプレートが優れた熱伝導特性と大きな熱容量を有し、電子回路ブロックの熱エネルギーを効率よく吸収して放熱するからである。
以上の電池モジュールは、小型化しながら、電子回路ブロックを確実にベースプレートに固定できる特長がある。
以上の電池モジュールは、エンドプレートに電子回路ブロックを固定しながら、ベースプレートを使用機器に簡単で確実に固定できる特長がある。
以下の実施例に示す電池モジュールは、主として、エンジンとモータの両方で走行するハイブリッドカーやプラグインハイブリッドカー、モータのみで走行する電気自動車、モータで走行する電動バイクなどの電動車両の電源に最適である。ただし、本発明の電池モジュールは、電動車両以外の大出力が要求される用途である蓄電装置用の電源にも適している。
電池セル1は、図2に示すように、厚さに比べて幅が広い、言い換えると幅よりも薄い角形の二次電池で、厚さ方向に積層されて電池積層体2としている。電池セル1はリチウムイオン二次電池である。ただし、電池セルは、ニッケル水素電池、ニッケルカドミウム電池等、充電できる他の全ての二次電池とすることもできる。電池セル1は、密閉構造の外装缶に正負の電極板を電解液と共に収容している。外装缶は、アルミニウムやアルミニウム合金等の金属板を角形にプレス成形され、開口部を封口板で気密に密閉している。封口板は、外装缶と同じアルミニウムやアルミニウム合金で、正負の電極端子11を固定して、電極端子11の間に排気弁を設けている。なお、正負の電極端子11は、少なくとも一方の電極端子11が封口板と絶縁された状態とされている。この電池セル1は、封口板を端子面10として正負の電極端子11を設けている。さらに、電池セル1は、外装缶の底面及び側面が絶縁フィルムにより被覆されている。
電池積層体2は、図2に示すように、積層している電池セル1の間に絶縁スペーサ12を挟着している。図の絶縁スペーサ12は、樹脂等の絶縁材で薄いプレート状またはシート状に製作されている。図に示す絶縁スペーサ12は、電池セル1の対向面とほぼ等しい大きさのプレート状としており、この絶縁スペーサ12を互いに隣接する電池セル1の間に積層して、隣接する電池セル1同士を絶縁している。なお、隣接する電池セル1間に配置されるスペーサとしては、電池セルとスペーサの間に冷却気体の流路が形成される形状のスペーサを用いることもできる。
電池積層体2は、金属製のエンドプレート3と絶縁するために、両端面には端面スペーサ13を挟んでエンドプレート3を配置することができる。端面スペーサ13は、電池積層体2とエンドプレート3との間に配置されてエンドプレート3を電池積層体2から絶縁する。端面スペーサ13は、樹脂等の絶縁材で薄いプレート状またはシート状に製作されている。端面スペーサ13は、電池セル1の対向面全体をカバーできる大きさのプレート部を設けて、このプレート部を電池積層体2の両端に配置された電池セル1とエンドプレート3との間に積層している。
エンドプレート3は、電池積層体2の電池セル1の積層方向における両端面にあって、電池積層体2を固定している。エンドプレート3は金属製の板材で、外形が電池セル1の外形にほぼ等しく、あるいは電池セル1よりも僅かに大きい四角形の板材である。エンドプレート3は、高張力綱で製作して強靭な構造にできる。エンドプレート3は、1枚の金属板とし、あるいは複数の金属板を積層する構造とし、あるいは金属板とプラスチックとの積層体とすることができる。1枚の金属板からなるエンドプレート3は熱容量が大きく、電子回路ブロック6の熱エネルギーを効率よく吸収できる。また、複数の板材を積層するエンドプレートは、電子回路ブロックを固定する表面側を少なくトの金属製の板材とする。電子回路ブロックが熱結合状態に固定されて、放熱特性を向上するためである。さらに、エンドプレートは、アルミニウム板と高張力綱板の積層構造とすることができる。このエンドプレートは、表面側をアルミニウム板として電子回路ブロックを固定し、アルミニウム板と高張力綱板とを面接触状態に積層して、アルミニウム板から高張力綱板に効率よく熱伝導できる構造とすることもできる。ただし、エンドプレートは必ずしも金属製とすることなく、たとえばエンジニアリングプラスチック等の優れた強度のプラスチック製とすることもできる。
バインドバー4は、電池セル1の積層方向に伸びて両端部をエンドプレート3に固定して、一対のエンドプレート3で電池積層体2を固定している。バインドバー4は、電池積層体2の側面に沿う所定の上下幅と所定の厚さを有する金属板で、電池積層体2の両側面に対向して配置されている。バインドバー4は、電池積層体2の両端面を強い圧力で加圧して、充放電して膨張しようとする電池セル1を定位置に配置する。バインドバー4の金属板は、好ましくは高張力綱を使用する。金属板のバインドバー4は、プレス成形して所定の形状に形成される。
ベースプレート9は、図4及び図6に示すように、電池積層体2とエンドプレート3の底面に配置される。ベースプレート9は、エンドプレート3が固定され、さらに好ましくはバインドバー4の下端部も固定される。エンドプレート3やバインドバー4は、固定ネジ15、16を介してベースプレート9に固定される。エンドプレート3を固定する固定ネジ15は、エンドプレート3を上下方向に貫通して、エンドプレート3をベースプレート9に固定する。また、バインドバー4を固定する固定ネジ16も、バインドバー4の下端部である下側連結片4Bを貫通して、ベースプレート9に固定される。
図4に示すように、電池セル1の上面、すなわち電池セル1の端子面10に対向する位置にガスダクト5が配置される。ガスダクト5は、排気弁1aの開口部から排出される吐き出し物をスムーズに排出する内容積の筒状で、下面を開口して、各々の電池セル1の排気弁1aの開口部に連結している。ガスダクト5は、電池積層体2の上面に、排気弁1aから排出される排出ガスを外部に排気するように、電池セル1の端子面10との間に隙間ができないように電池積層体2の上面に密着して配置されて、下面に開口する開口部5aを各々の電池セル1の排気弁1aに連結している。ガスダクト5は、端子面10との間にパッキンやシール材等を配置して、排出ガスを漏れないように配置することもできる。
電子回路ブロック6は、図7に示すように、各々の電池セル1にリード線を介して接続されて、電池セル1の電圧を検出する電圧検出回路22を備える。電子回路ブロック6は、電圧検出回路22を実現する電子部品を回路基板20(図5及び図6参照)に実装している。ただ、電子回路ブロック6は、電圧検出回路22を含む全ての電子回路を集積回路として、集積回路を絶縁材のパッケージに埋設するブロックとすることもできる。電子回路ブロック6は、図5及び図6に示すように、放熱器21の金属プレートを表面に配置するブロックとすることができる。放熱器21は、電子回路ブロック6が内蔵する発熱部品、たとえば、均等化回路の放電抵抗、電流をコントロールするFETなどの半導体素子等に熱結合されて、これ等の発熱部品の熱エネルギーを外部に放熱する。電子回路ブロック6は、回路基板20に電子部品を実装して全体の形状を板状とし、あるいは集積回路をパッケージに埋設して板状としている。
図9は、エンジンとモータの両方で走行するハイブリッド自動車に電池モジュールを搭載する例を示す。この図に示す電池モジュールを搭載した車両HVは、車両本体91と、この車両本体91を走行させるエンジン96及び走行用のモータ93と、これらのエンジン96及び走行用のモータ93で駆動される車輪97と、モータ93に電力を供給する電池モジュール100と、電池モジュール100の電池を充電する発電機94とを備えている。電池モジュール100は、DC/ACインバータ95を介してモータ93と発電機94に接続している。車両HVは、電池モジュール100の電池を充放電しながらモータ93とエンジン96の両方で走行する。モータ93は、エンジン効率の悪い領域、例えば加速時や低速走行時に駆動されて車両を走行させる。モータ93は、電池モジュール100から電力が供給されて駆動する。発電機94は、エンジン96で駆動され、あるいは車両にブレーキをかけるときの回生制動で駆動されて、電池モジュール100の電池を充電する。なお、車両HVは、図に示すように、電池モジュール100を充電するための充電プラグ98を備えてもよい。この充電プラグ98を外部電源と接続することで、電池モジュール100を充電できる。
また、図10は、モータのみで走行する電気自動車に電池モジュールを搭載する例を示す。この図に示す電池モジュールを搭載した車両EVは、車両本体91と、この車両本体91を走行させる走行用のモータ93と、このモータ93で駆動される車輪97と、このモータ93に電力を供給する電池モジュール100と、この電池モジュール100の電池を充電する発電機94とを備えている。電池モジュール100は、DC/ACインバータ95を介してモータ93と発電機94に接続している。モータ93は、電池モジュール100から電力が供給されて駆動する。発電機94は、車両EVを回生制動する時のエネルギーで駆動されて、電池モジュール100の電池を充電する。また車両EVは充電プラグ98を備えており、この充電プラグ98を外部電源と接続して電池モジュール100を充電できる。
さらに、本発明は、電池モジュールの用途を、車両を走行させるモータの電源には特定しない。実施形態に係る電池モジュールは、太陽光発電や風力発電等で発電された電力で電池を充電して蓄電する蓄電装置の電源として使用することもできる。図11は、電池モジュール100の電池を太陽電池82で充電して蓄電する蓄電装置を示す。
Claims (17)
- 複数の電池セルを積層してなる電池積層体と、
前記電池積層体の積層方向の両端部に配置してなる一対のエンドプレートと、
一対の前記エンドプレートを連結してなるバインドバーと、
前記電池セルの電圧を検出する電圧検出回路を実装してなる電子回路ブロックと、を備える電池モジュールであって、
前記電子回路ブロックが、
前記エンドプレートの表面に配置されてなることを特徴とする電池モジュール。 - 請求項1に記載する電池モジュールであって、
前記電池モジュールが、
前記電池セルの端子面に対向してガスダクトを配置してなることを特徴とする電池モジュール。 - 請求項1又は2に記載する電池モジュールであって、
前記電子回路ブロックが、
前記エンドプレートの外側表面に熱結合状態で固定されてなることを特徴とする電池モジュール。 - 請求項1ないし3のいずれかに記載する電池モジュールであって、
前記電子回路ブロックの外形が、
前記エンドプレートの外形よりも小さく、
前記電子回路ブロックが、前記エンドプレートの外周縁から突出することなく表面に配置されてなることを特徴とする電池モジュール。 - 請求項1ないし4のいずれかに記載する電池モジュールであって、
前記エンドプレートが金属製であることを特徴とする電池モジュール。 - 請求項5に記載する電池モジュールであって、
前記電子回路ブロックが、
前記エンドプレートに絶縁状態で固定されてなることを特徴とする電池モジュール。 - 請求項1ないし6のいずれかに記載する電池モジュールであって、
前記電子回路ブロックが、
前記電池セルの均等化回路を備えることを特徴とする電池モジュール。 - 請求項1ないし7のいずれかに記載する電池モジュールであって、
前記電子回路ブロックが、
無線通信回路を備えることを特徴とする電池モジュール。 - 請求項8に記載する電池モジュールであって、
前記エンドプレートが、
前記電子回路ブロックの外周縁をシールドするシールド凸部を一体構造に備えることを特徴とする電池モジュール。 - 請求項1ないし9のいずれかに記載する電池モジュールであって、
前記エンドプレートを固定してなるベースプレートを備え、
前記ベースプレートが、
前記エンドプレートの外側表面から突出してなるブラケットを有し、
前記電子回路ブロックが、
平面視において、前記ブラケットの先端縁から外側面に突出しない形状であることを特徴とする電池モジュール。 - 請求項10に記載する電池モジュールであって、
前記電子回路ブロックが、
下部が前記ブラケットに固定されてなることを特徴とする電池モジュール。 - 請求項11に記載する電池モジュールであって、
前記ブラケットが、
固定穴を有し、
前記電子回路ブロックが、
平面視において前記固定穴と異なる位置に配置されてなることを特徴とする電池モジュール。 - 請求項11又は12に記載される電池モジュールであって、
前記電子回路ブロックが、
上縁部の一部が局部的に前記エンドプレートに固定されて、
下部が前記ブラケットに固定されてなることを特徴とする電池モジュール。 - 請求項1ないし10のいずれかに記載する電池モジュールであって、
前記電子回路ブロックが、
前記エンドプレートに局部的に固定されてなることを特徴とする電池モジュール。 - 請求項1ないし14のいずれかに記載する電池モジュールであって、
前記電子回路ブロックが、
ゴム状弾性体を介して前記エンドプレートの表面に固定されてなることを特徴とする電池モジュール。 - 請求項1ないし15のいずれかに記載の電池モジュールを備える電動車両であって、
前記電池モジュールと、
該電池モジュールから電力供給される走行用のモータと、
前記電池モジュール及び前記モータを搭載してなる車両本体と、
前記モータで駆動されて前記車両本体を走行させる車輪とを備えることを特徴とする電動車両。 - 請求項1ないし15のいずれかに記載の電池モジュールを備える蓄電装置であって、
前記電池モジュールと、
該電池モジュールへの充放電を制御する電源コントローラとを備え、
前記電源コントローラでもって、外部からの電力により前記電池セルへの充電を可能とすると共に、該電池セルに対し充電を行うよう制御することを特徴とする蓄電装置。
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| US17/633,613 US20220320600A1 (en) | 2019-09-30 | 2020-07-20 | Battery module, and electric vehicle and power storage device comprising battery module |
| EP20872216.5A EP4040565B1 (en) | 2019-09-30 | 2020-07-20 | Battery module, and electric vehicle and power storage device comprising battery module |
| CN202080068433.4A CN114450845B (zh) | 2019-09-30 | 2020-07-20 | 电池组件和具备该电池组件的电动车辆和蓄电装置 |
| JP2021550367A JP7593931B2 (ja) | 2019-09-30 | 2020-07-20 | 電池モジュールとこの電池モジュールを備える電動車両及び蓄電装置 |
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| JP2019-180640 | 2019-09-30 |
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| WO2021065160A1 true WO2021065160A1 (ja) | 2021-04-08 |
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| Country | Link |
|---|---|
| US (1) | US20220320600A1 (ja) |
| EP (1) | EP4040565B1 (ja) |
| JP (1) | JP7593931B2 (ja) |
| CN (1) | CN114450845B (ja) |
| WO (1) | WO2021065160A1 (ja) |
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| JP2022002189A (ja) * | 2020-06-22 | 2022-01-06 | プライムプラネットエナジー&ソリューションズ株式会社 | 電池モジュール及びバッテリシステム |
| CN114597402A (zh) * | 2022-03-31 | 2022-06-07 | 广州帝辉汽车用品有限公司 | 一种耐高温和抗低温型磷酸铁锂电池 |
| US20230317983A1 (en) * | 2022-03-30 | 2023-10-05 | Ford Global Technologies, Llc | Power Cell and Associated Assembly Method |
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| WO2021199489A1 (ja) * | 2020-03-30 | 2021-10-07 | 三洋電機株式会社 | 電池モジュール、電池モジュールを備える電動車両及び蓄電装置 |
| KR20220040867A (ko) * | 2020-09-24 | 2022-03-31 | 현대자동차주식회사 | 차량용 고전압 배터리팩 |
| CN114188652A (zh) * | 2021-11-22 | 2022-03-15 | 南京快轮智能科技有限公司 | 滑板车的电池锁紧装置 |
| DE102022127273A1 (de) * | 2022-10-18 | 2024-04-18 | Bayerische Motoren Werke Aktiengesellschaft | Baugruppe für einen elektrischen Energiespeicher mit Wärmeleitblech |
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Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2021065160A1 (ja) | 2021-04-08 |
| EP4040565A4 (en) | 2022-12-28 |
| CN114450845B (zh) | 2025-07-08 |
| JP7593931B2 (ja) | 2024-12-03 |
| EP4040565B1 (en) | 2024-10-16 |
| US20220320600A1 (en) | 2022-10-06 |
| CN114450845A (zh) | 2022-05-06 |
| EP4040565A1 (en) | 2022-08-10 |
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