WO2023176095A1 - バッテリー冷却システム - Google Patents
バッテリー冷却システム Download PDFInfo
- Publication number
- WO2023176095A1 WO2023176095A1 PCT/JP2022/048137 JP2022048137W WO2023176095A1 WO 2023176095 A1 WO2023176095 A1 WO 2023176095A1 JP 2022048137 W JP2022048137 W JP 2022048137W WO 2023176095 A1 WO2023176095 A1 WO 2023176095A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cooling system
- battery
- temperature control
- control valve
- refrigerant
- Prior art date
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 62
- 239000003507 refrigerant Substances 0.000 claims description 66
- 230000007246 mechanism Effects 0.000 abstract description 5
- 239000002826 coolant Substances 0.000 abstract 3
- 239000001993 wax Substances 0.000 description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 239000000498 cooling water Substances 0.000 description 16
- 239000008188 pellet Substances 0.000 description 13
- 229920002943 EPDM rubber Polymers 0.000 description 8
- 239000010935 stainless steel Substances 0.000 description 8
- 229910001220 stainless steel Inorganic materials 0.000 description 8
- 230000007257 malfunction Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 239000012188 paraffin wax Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004200 microcrystalline wax Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
- H01M10/637—Control systems characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- the present invention relates to a battery cooling system, and more particularly, the present invention relates to a battery cooling system that uses a jacket having branch channels that branch off from a main channel and return back directly to a pump or fan that pumps refrigerant. Regarding the battery cooling system that cools the battery.
- Patent Document 1 describes a battery (13) for driving an electric vehicle, a cooling member (14) having refrigerant passages (14a, 14b) inside, and a refrigerant supplying refrigerant to the cooling member (14).
- a battery cooling device for an electric vehicle is disclosed that includes a supply pipe (15) and a refrigerant discharge pipe (16) that discharges refrigerant from the cooling member (14) (Claims of the claims of Patent Document 1) 1. See paragraphs [0027] to [0043] of the specification, FIGS. 1 to 8 of the drawings, etc.).
- This battery cooling device includes a refrigerant jacket (14) that is integrally formed with a battery case (12) and has refrigerant passages (14a, 14b) inside, and refrigerant is supplied from the refrigerant supply pipe (15).
- the refrigerant enters the refrigerant inlets (20) of the pair of refrigerant jackets (14) located at the frontmost position, branches into left and right refrigerant supply passages (14a), flows outward in the vehicle width direction, and makes a U-turn at the communication chamber (23).
- the refrigerant flows inward in the vehicle width direction through the left and right refrigerant discharge passages (14b), merges at the refrigerant outlet (21), and is returned to the refrigerant discharge pipe (16) (paragraph [0037] of the specification of Patent Document 1). reference).
- Patent Document 2 describes a plurality of coolers (30, 31, 32, 33) and a refrigerant supply flow path (W20) that supplies refrigerant to a plurality of the coolers (Claim 1 of the claims of Patent Document 2, Specification). (See paragraphs [0011] to [0021] of the book, Figures 1 to 3 of the drawings, etc.).
- the refrigerant supply flow path of the cooling system described in Patent Document 2 includes a main flow path (W21) through which the refrigerant flows, and a plurality of coolers (30, 31, 32, 33) branched from the main flow path (W21).
- a plurality of branch channels (W22a, W22b, W22c, W22d) are formed to distribute the refrigerant to each branch channel (W22a, W22b, W22c, W22d). ) are arranged, so that refrigerant is supplied to the plurality of coolers (30, 31, 32, 33) in parallel.
- the cooling system described in Patent Document 2 also branches from the main channel (W21) into branch channels (W22a, W22b, W22c, W22d) in the refrigerant supply channel.
- the passage can be improved by providing a constricted part (301, 311, 321, 331) in the part from the branch part (Pb) to the heat exchange part (300, 310, 320, 330). Water resistance equalizes the flow rate of refrigerant.
- the cooling system described in Patent Document 2 like the battery cooling device in Patent Document 1, has the problem that the flow rate of cooling water flowing to each jacket varies due to variations in passage area and bending, and the battery pack The problem of variations in the temperature of each battery pack cannot be solved because variations in the amount of heat generated occur due to product errors.
- Patent Document 3 describes a common channel through which a refrigerant flows, a plurality of branch channels connected to the common channel and for supplying refrigerant to one or more objects to be cooled, and a plurality of branch channels connected to each branch channel.
- a cooling system is disclosed that includes at least one EHD flow rate adjustment device for adjusting the inflow amount of refrigerant (Claim 1 of Patent Document 3, paragraphs [0039] to [0039] of the specification). [0056], see FIGS. 1 to 6 of the drawings, etc.).
- Patent Document 3 uses an EHD flow rate adjustment device to adjust the flow rate of the refrigerant, which requires complex control and, like electric vehicles, vibrates and can cause serious accidents due to malfunction. Mechanisms that are susceptible to this problem have a problem in that they are unsuitable due to their lack of durability and reliability.
- the present invention has been devised to solve the above-mentioned problems, and its purpose is to provide each battery pack with a mechanism that is inexpensive, simple, durable, and has few malfunctions and is highly reliable.
- the object of the present invention is to provide a battery cooling system that can increase or decrease the flow resistance of a refrigerant according to the amount of heat generated by the refrigerant and distribute the flow to an appropriate flow rate.
- a battery cooling system is a battery cooling system that cools a battery made up of a plurality of battery packs using a jacket having a branch flow path that branches off and returns from a main flow path that is directly connected to a pressure feeding means that pumps a refrigerant. and a self-powered temperature control valve that adjusts the opening degree of the valve according to the temperature of the surrounding refrigerant is provided in the branch flow path that flows out from the flow path of the jacket to the outside and returns to the main flow path. It is characterized by
- a battery cooling system is characterized in that in the first invention, the temperature control valve is a wax type thermostat.
- a battery cooling system is characterized in that in the first invention, the temperature control valve is a bellows type thermostat.
- a battery cooling system is characterized in that in the first invention, the temperature control valve is an SMA type thermostat.
- a battery cooling system is characterized in that, in any one of the first to fourth aspects of the invention, a leak hole is formed in the temperature control valve.
- a battery cooling system is characterized in that in the fifth invention, the leak hole is a leak groove formed in a part of the valve seat or the valve body.
- a battery cooling system according to a seventh invention is characterized in that it has a pressure relief structure in any one of the first to sixth inventions.
- the flow resistance of the refrigerant can be increased or decreased according to the amount of heat generated by each battery pack to distribute the flow rate to an appropriate amount, and the battery temperature of each cell can be managed uniformly. I can do it. Therefore, the lifespan of the battery pack and battery can be extended and durability can be improved.
- the above-mentioned effects are achieved with a temperature control valve that has been used for many years as a cooling means for internal combustion engines of automobiles and the like that vibrate and may cause serious accidents due to malfunction. Therefore, it is inexpensive, simple, durable, and highly reliable with few malfunctions.
- the fifth invention by constantly measuring the temperature of the refrigerant while allowing a constant amount of refrigerant to constantly flow through the leak hole, it becomes possible to constantly monitor the temperature of each battery pack.
- the foreign matter can be removed by being swept away by the refrigerant.
- the refrigerant can be circulated even in the temperature range before the thermostat valve opens by increasing the output of the pump that pumps the refrigerant as necessary. .
- FIG. 1 is a schematic plan view schematically showing the configuration of a battery cooling system according to an embodiment of the present invention. It is a sectional view showing the composition of the temperature control valve concerning a 1st embodiment of the present invention. It is a 1st open state explanatory diagram which shows the valve open state by temperature sensing of the temperature control valve same as the above. It is a 2nd open state explanatory diagram which shows the valve open state by pressure sensing of the temperature control valve same as the above.
- FIG. 5(a) is a sectional view showing the configuration of a temperature control valve according to a second embodiment of the present invention, and FIG. 5(b) is an enlarged view of section A in FIG. 5(a).
- FIG. 6(a) is a sectional view showing the configuration of a temperature control valve according to a third embodiment of the present invention, and FIG. 6(b) is an enlarged view of section B in FIG. 6(a).
- FIG. 1 is a schematic plan view schematically showing the configuration of a battery cooling system 1 according to an embodiment of the present invention.
- a battery cooling system 1 is a cooling system that mainly includes a water jacket 2 that cools the battery by circulating cooling water as a refrigerant. Furthermore, the battery to be cooled by the battery cooling system 1 according to the present embodiment is a battery pack 3 in which a battery module in which a plurality of battery cells are stacked and integrated is housed in a case. It is.
- the water jacket 2 As shown in FIG. 1, the water jacket 2 according to this embodiment is provided for each battery pack 3, and one corresponding battery pack 3 is installed on each of the water jackets 2. Specifically, in the water jacket 2, the bottom surface of the case of the battery pack 3 and the water jacket 2 are integrated. However, the water jacket 2 is separate from the case of the battery pack 3, and the case of the battery pack 3 may be placed on top of the water jacket 2 and in contact with it. In short, the water jacket 2 and the battery pack 3 only need to be provided in close contact with each other or in close proximity to each other so as to quickly transfer heat and cool them.
- This water jacket 2 has a main body made of a rectangular metal plate, and a supply channel and a discharge channel for supplying cooling water are formed inside the main body. That is, as shown in FIG. 1, the battery cooling system 1 includes a supply trunk flow path 10 and a discharge trunk flow path 11, which are trunk flow paths that are directly connected to a pump P, which is a pumping means for pumping refrigerant, without going through a branch. It has a plurality of supply branch channels 12 and a plurality of discharge branch channels 13, which are branch channels that branch from there in parallel at a plurality of locations and return to the main channel.
- a temperature control valve 5 is provided at the outlet of the water jacket 2 from the discharge channel to the external discharge main channel 11.
- a temperature control valve 5 which is a wax type thermostat, is provided in the middle of the discharge branch flow path 13 returning from each water jacket 2 to the discharge main flow path 11.
- the temperature control valve according to the present invention is not limited to a wax-type thermostat, but may be a bellows-type thermostat in which ether is sealed in an elastic bellows and the valve is opened and closed by expanding and contracting the ether due to heat. I don't mind. Further, the temperature control valve according to the present invention may be another type of thermostat such as an SMA type thermostat that opens and closes the valve using a shape memory alloy. In short, the temperature control valve according to the present invention may be any temperature control valve that adjusts the opening degree of the valve according to the temperature of the surrounding refrigerant.
- FIG. 2 is a sectional view showing the configuration of the temperature control valve 5 according to the first embodiment of the present invention.
- FIG. 3 is a first open state explanatory diagram showing a valve open state due to temperature sensing of the temperature control valve 5
- FIG. 4 is a second open state explanatory diagram showing a valve open state due to pressure sensing of the temperature control valve 5. It is a diagram.
- the temperature control valve 5 is a wax type in which a stainless steel mounting frame 51 is fitted into a cylindrical metal case 50 made of aluminum alloy or the like, and a wax pellet 6 is mounted inside the mounting frame 51. It's a thermostat. Further, an O-ring 52 made of EPDM (ethylene propylene diene rubber) is attached to the groove on the outer periphery of the case 50, and a retaining ring 53 made of stainless steel is attached to the bottom of the case 50 to close the gap with the wax pellet 6. It is being
- the wax pellet 6 includes a housing 60 in which paraffin wax is sealed, and a piston rod 61 that is freely retractable into the housing 60.
- This temperature control valve 5 has a mechanism in which a piston rod 61 is made to protrude by the expansion of wax, and a valve body 7 attached to the piston rod 61 is pushed up, thereby opening the valve.
- the wax encapsulated in the wax pellets 6 is not limited to paraffin wax, and it goes without saying that any substance, such as microwax, that has a predetermined thermal expansion characteristic with a relatively large change in volume may be used.
- the valve body 7 has a valve body 70 made of a doughnut-shaped stainless steel plate as a base, and the periphery of the valve body 70 is covered with a sealing material 71 made of EPDM (ethylene propylene diene rubber). Further, as shown in FIG. 2, the sealing material 71 is provided with protrusions on the lower surface, which is the contact surface with the piston rod 61 surrounded by a dashed-dotted circle, which is the leak path point, and the contact surface with the case 50.
- the rubber seal is designed to eliminate leaks.
- a stainless steel coil spring 8 is interposed between the valve body 7 and the mounting frame 51 to bias the valve body 7 in the direction toward the wax pellet 6 side.
- the temperature control valve 5 when the temperature control valve 5 is actuated and opened by temperature sensing in the first open state, the temperature control valve 5 is heated through the discharge branch channel 13 by the heat generated by the individual battery packs 3 described above.
- the cooling water flows around the wax pellet 6, and the wax in the housing 60 is warmed and thermally expanded, causing the piston rod 61 to protrude.
- valve body 7 fitted with the piston rod 61 is pushed up, the amount of opening of the valve is increased, and the flow rate of cooling water is increased, so that only the battery pack 3, which generates a high amount of heat, is affected by the water jacket 2. can be cooled down.
- valve body 7 when the temperature control valve 5 is actuated and opened by pressure sensing in the second open state, the valve body 7 is connected to the piston rod regardless of the amount of protrusion of the piston rod 61. It has a pressure relief structure in which the part fitted to 61 can be removed. Thereby, the abnormal pressure in the branch flow path of the water jacket 2 can be released, and the water jacket 2 and the entire flow path of the battery cooling system 1 can be protected.
- the temperature control valve 5 can be Even in this temperature range, the refrigerant can be circulated by increasing the output of the pump that pumps the refrigerant as necessary.
- pressure relief structure of the temperature control valve 5 is exemplified in which the fitting portion of the valve body 7 comes off from the piston rod 61, if the valve body 7 is deformed by pressure and pushed open, etc.
- Other pressure relief structures may be used in which pressure is released when pressure is applied.
- the flow resistance of the refrigerant can be increased or decreased according to the calorific value of each battery pack 3, and the refrigerant can be distributed at an appropriate flow rate.
- the battery temperature of each cell can be managed uniformly. Therefore, the lifespan of the battery pack 3 and the battery can be extended and durability can be improved.
- the above-mentioned effects are achieved using a temperature control valve that has a long track record as a cooling means for internal combustion engines such as automobiles that vibrate and may cause serious accidents due to malfunction. , it can be made inexpensive, simple, durable, less likely to malfunction, and highly reliable.
- the temperature control valve 5 has a pressure relief structure in which the valve (valve body 7) opens to release pressure when the pressure applied to the valve body 7 exceeds a predetermined value. Even in the temperature range before the thermostat valve opens, the refrigerant can be circulated by increasing the output of the pump that pumps the refrigerant as necessary.
- FIG. 5(a) is a sectional view showing the configuration of a temperature control valve 5' according to a second embodiment of the present invention
- FIG. 5(b) is an enlarged view of section A in FIG. 5(a).
- the temperature control valve 5' according to the second embodiment includes a metal case 50' made of aluminum alloy or the like, a stainless steel cap 51' and a ring-shaped frame 52'. It is a wax type thermostat that is fitted and fixed, and a wax pellet 6' is installed inside it.
- the temperature control valve 5' according to the second embodiment differs from the temperature control valve 5 according to the first embodiment described above mainly in the valve body portion.
- the wax pellet 6' includes a housing 60' in which paraffin wax is sealed, and a piston rod 61' that is freely retractable into the housing 60'.
- the temperature control valve 5' differs from the temperature control valve 5 described above in that the wax expands to cause the piston rod 61' to protrude and push down the valve body 7' fitted in the housing 60' to open the valve. The mechanism is to do so.
- the wax encapsulated in the wax pellet 6' is not limited to paraffin wax, and may be any substance such as microwax that has a predetermined thermal expansion characteristic and has a relatively large change in volume.
- This valve body 7' has a valve body 70' made of a donut-shaped stainless steel plate, and allows a small amount (predetermined amount) of cooling water, which is a refrigerant, to flow through the valve body 70' even when the valve is closed.
- a leak hole 72' is bored. Therefore, according to the battery cooling system 1 in which the temperature control valve 5' according to the second embodiment is installed in the discharge branch flow path 13 described above, even when the temperature control valve 5' is closed, the cooling water is leaked through the leak hole 72'. can be made to always flow in a constant amount through the discharge branch channel 13. Therefore, according to the battery cooling system 1 equipped with the temperature control valve 5', the temperature of each battery pack 3 can be constantly monitored by constantly measuring the temperature of the cooling water that has passed through the battery pack 3.
- valve body 7' may also be covered with a rubber material such as EPDM (ethylene propylene diene rubber), similarly to the aforementioned valve body 7.
- EPDM ethylene propylene diene rubber
- a stainless steel coil spring 8' is interposed between the valve body 7' and the bottom surface of the case 50', so that the valve body 7' is placed on the bottom side of the case 50'.
- the wax pellet 6' is biased toward the wax pellet 6'.
- FIG. 6(a) shows the configuration of a temperature control valve 5'' according to a third embodiment of the present invention.
- FIG. 6(b) is an enlarged view of section B in FIG. 6(a).
- the temperature control valve 5'' according to the third embodiment differs from the temperature control valve 5' according to the second embodiment described above in the valve body portion, and the other parts have substantially the same configuration.
- the same components as the temperature control valve 5' according to the second embodiment are denoted by the same reference numerals, and the description thereof will be omitted.
- the valve body 7'' of the temperature control valve 5'' according to the third embodiment has a valve body 70'' made of a donut-shaped stainless steel plate, and a leak hole 72' is provided in the valve body 70'' even when the valve is closed.
- a leak groove 72'' is formed by partially cutting out a portion of the valve body 70' to allow a predetermined amount of cooling water to flow.For this reason, the temperature control valve 5'' according to the third embodiment is described above.
- the leak groove 72'' allows the cooling water to flow even when the temperature control valve 5'' is closed, so that the temperature of the cooling water that has passed through the battery pack 3 is maintained at all times.
- the temperature of each battery pack 3 can be constantly monitored. Furthermore, according to the battery cooling system 1 equipped with the temperature control valve 5'', even if the leak groove 72'' is clogged with foreign matter, the foreign matter can be removed by opening the temperature control valve 5'' and opening the valve body 7''. This can be removed by flushing it away from the leak groove 72'' with cooling water.
- valve body 7'' may also be covered with a rubber material such as EPDM (ethylene propylene diene rubber) like the valve body 7 described above.
- EPDM ethylene propylene diene rubber
- this leak groove 72'' is not formed on the valve body 7'', but on the valve seat side, that is, in the case of the illustrated embodiment, the cap 51, which is the other side that closes and closes with the valve body 7''. It doesn't matter if a part of the case 50 is cut out and a leak groove is formed.Even in that case, the cooling water can flow even when the valve is closed, and the cooling water can remove foreign substances when the valve is opened. This is because it can be removed by washing away.
- the battery cooling system 1 according to the embodiment of the present invention and the temperature control valves 5 to 5'' according to the first to third embodiments have been described in detail. These are merely examples of specific embodiments for carrying out the present invention. Therefore, the technical scope of the present invention should not be construed as being limited by these.
- cooling water is used as a refrigerant.
- any refrigerant made of a fluid having an appropriate heat capacity capable of cooling the battery pack may be used.
- Battery cooling system 10 Supply main channel 11: Discharge main channel 12: Supply branch channel 13: Discharge branch channel 2: Water jacket 3: Battery pack 5, 5', 5'': Temperature control valve 50, 50' : Case 51: Mounting frame 51': Cap 52: O-ring 52': Frame body 53: Retaining ring 6, 6': Wax pellet 60, 60': Housing 61, 61': Piston rod 7, 7', 7'' : Valve body 70, 70', 70'': Valve body 71: Seal material 72': Leak hole 72'': Leak groove 8, 8': Coil spring P: Pump (pressure feeding means)
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Abstract
Description
図1を用いて、本発明の実施の形態に係るバッテリー冷却システム1について説明する。電動車の床下に搭載されたIPU(インテリジェントパワーユニット)のバッテリーを冷却する場合を例示して説明する。図1は、本発明の実施の形態に係るバッテリー冷却システム1の構成を模式的に示す概略平面図である。
本実施形態に係るウォータージャケット2は、図1に示すように、電池パック3毎に設けられており、ウォータージャケット2のそれぞれの上に対応する一個の電池パック3が設置されている。具体的には、ウォータージャケット2は、電池パック3のケースの底面とウォータージャケット2が一体化されている。但し、ウォータージャケット2は、電池パック3のケースと別体となっており、ウォータージャケット2の上に、電池パック3のケースが載置されて接していても構わない。要するに、ウォータージャケット2と電池パック3は、素早く熱伝達して冷却できるように密着又は近接して設けられていればよい。
そして、図1に示すように、ウォータージャケット2の排出流路から外部の排出幹流路11へ流れ出る出口に温調弁5が設けられている。本実施形態に係るバッテリー冷却システム1では、各ウォータージャケット2から排出幹流路11へ戻る排出枝流路13の途中にワックス式サーモスタットである温調弁5が設けられている。
[第1実施形態]
次に、図2~図4を用いて、本発明の第1実施形態に係る温調弁5についてさらに詳細に説明する。図2は、本発明の第1実施形態に係る温調弁5の構成を示す断面図である。また、図3は、温調弁5の温度感知によるバルブ開放状態を示す第1開放状態説明図であり、図4は、温調弁5の圧力感知によるバルブ開放状態を示す第2開放状態説明図である。
次に、図5を用いて、本発明の第2実施形態に係る温調弁5’について説明する。図5(a)は、本発明の第2実施形態に係る温調弁5’の構成を示す断面図であり、図5(b)は、図5(a)のA部拡大図である。図5(a)に示すように、第2実施形態に係る温調弁5’は、アルミ合金などからなる金属製のケース50’にステンレス製のキャップ51’及びリング状の枠体52’が嵌め込まれて固着され、その内部にワックスペレット6’が装着されたワックス式サーモスタットである。なお、第2実施形態に係る温調弁5’が、前述の第1実施形態に係る温調弁5と相違する点は、主に弁体部分である。
次に、図6を用いて、本発明の第3実施形態に係る温調弁5”について説明する。図6(a)は、本発明の第3実施形態に係る温調弁5”の構成を示す断面図であり、図6(b)は、図6(a)のB部拡大図である。なお、第3実施形態に係る温調弁5”が、前述の第2実施形態に係る温調弁5’と相違する点は弁体部分でありその他は略同一構成となっている。このため、第2実施形態に係る温調弁5’と同一構成は同一符号を付し、説明を省略する。
10:供給幹流路
11:排出幹流路
12:供給枝流路
13:排出枝流路
2:ウォータージャケット
3:電池パック
5,5’,5”:温調弁
50,50’:ケース
51:取付枠
51’:キャップ
52:Oリング
52’:枠体
53:止め輪
6,6’:ワックスペレット
60,60’:ハウジング
61,61’:ピストンロッド
7,7’,7”:弁体
70,70’,70”:弁本体
71:シール材
72’:リーク穴
72”:リーク溝
8,8’:コイルスプリング
P:ポンプ(圧送手段)
Claims (7)
- 冷媒を圧送する圧送手段と直接接続された幹流路から分岐して戻る枝流路を有するジャケットにより複数の電池パックからなるバッテリーを冷却するバッテリー冷却システムであって、
前記ジャケットの流路から外部へ流れ出て前記幹流路に戻る前記枝流路に、周囲の冷媒の温度に応じてバルブの開度を調整する自力式の温調弁が設けられていること
を特徴とするバッテリー冷却システム。 - 前記温調弁は、ワックス式サーモスタットであること
を特徴とする請求項1に記載のバッテリー冷却システム。 - 前記温調弁は、ベローズ式サーモスタットであること
を特徴とする請求項1に記載のバッテリー冷却システム。 - 前記温調弁は、SMA式サーモスタットであること
を特徴とする請求項1に記載のバッテリー冷却システム。 - 前記温調弁には、リーク穴が形成されていること
を特徴とする請求項1ないし4のいずれかに記載のバッテリー冷却システム。 - 前記リーク穴は、弁座又は弁体の一部に形成されたリーク溝であること
を特徴とする請求項5に記載のバッテリー冷却システム。 - 前記温調弁は、圧力が所定の値以上になると開く圧力リリーフ構造を有していること
を特徴とする請求項1ないし6のいずれかに記載のバッテリー冷却システム。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10220639A (ja) * | 1997-02-12 | 1998-08-21 | Nippon Thermostat Kk | 開閉弁の自己診断装置 |
JP2009027789A (ja) * | 2007-07-18 | 2009-02-05 | Nippon Telegr & Teleph Corp <Ntt> | 電池システム |
JP2015209906A (ja) * | 2014-04-25 | 2015-11-24 | 日本サーモスタット株式会社 | サーモスタット装置 |
WO2020003693A1 (ja) * | 2018-06-25 | 2020-01-02 | 株式会社デンソー | 電池温調装置及び制御装置 |
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JP6683756B2 (ja) | 2018-04-16 | 2020-04-22 | 本田技研工業株式会社 | 電動車両のバッテリ冷却装置 |
JP7380248B2 (ja) | 2019-02-26 | 2023-11-15 | 株式会社デンソー | 冷却システム |
JP2020173964A (ja) | 2019-04-10 | 2020-10-22 | 三菱重工業株式会社 | 冷却システム、電池システム及び冷却方法 |
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- 2022-12-27 US US18/567,480 patent/US20240283053A1/en active Pending
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10220639A (ja) * | 1997-02-12 | 1998-08-21 | Nippon Thermostat Kk | 開閉弁の自己診断装置 |
JP2009027789A (ja) * | 2007-07-18 | 2009-02-05 | Nippon Telegr & Teleph Corp <Ntt> | 電池システム |
JP2015209906A (ja) * | 2014-04-25 | 2015-11-24 | 日本サーモスタット株式会社 | サーモスタット装置 |
WO2020003693A1 (ja) * | 2018-06-25 | 2020-01-02 | 株式会社デンソー | 電池温調装置及び制御装置 |
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US20240283053A1 (en) | 2024-08-22 |
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DE112022002112T5 (de) | 2024-02-22 |
CN117223154A (zh) | 2023-12-12 |
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