WO2021113426A1 - Battery pack and charger system - Google Patents
Battery pack and charger system Download PDFInfo
- Publication number
- WO2021113426A1 WO2021113426A1 PCT/US2020/062975 US2020062975W WO2021113426A1 WO 2021113426 A1 WO2021113426 A1 WO 2021113426A1 US 2020062975 W US2020062975 W US 2020062975W WO 2021113426 A1 WO2021113426 A1 WO 2021113426A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- charger
- wall
- housing
- battery pack
- rail
- Prior art date
Links
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- 238000001816 cooling Methods 0.000 claims description 62
- 238000003780 insertion Methods 0.000 claims description 24
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- 238000004382 potting Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- RMPWIIKNWPVWNG-UHFFFAOYSA-N 1,2,3,4-tetrachloro-5-(2,3,4-trichlorophenyl)benzene Chemical compound ClC1=C(Cl)C(Cl)=CC=C1C1=CC(Cl)=C(Cl)C(Cl)=C1Cl RMPWIIKNWPVWNG-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
- H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
-
- 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
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
-
- 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
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
- H02J7/0044—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction specially adapted for holding portable devices containing batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with provisions for charging different types of batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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 utility model relates to battery packs and chargers for charging battery packs.
- a typical battery charger includes a battery charging circuit that is connectable to a power source and to a rechargeable battery and that is operable to charge the battery.
- a charger a housing includes a front wall, a rear wall, a top wall, a bottom wall, a first side wall, and a second side wall.
- An interface is positioned in the front wall and configured to engage a battery pack.
- the interface includes charging terminals positioned between a first rail and a second rail, a first groove positioned between the first rail and a wall of the housing, and a second groove positioned between the second rail and the wall of the housing.
- the interface is in communication with an interior of the housing.
- a fan is coupled within the housing adjacent the interface, and an air passage member includes a hollow body that has a first end and a second end spaced apart from the first end. The first end is coupled to the fan and the second end extends through one of the walls. The fan is operable to suck an air flow into the housing from outside the housing and guide the air flow through the air passage member to the interface.
- a charging system in another construction, includes a charger housing having a front wall, a rear wall, a top wall, a bottom wall, a first side wall, and a second side wall.
- the charger housing has a first connection interface positioned in the front wall, and the interface includes charging terminals positioned between a first rail and a second rail, a first groove positioned between the first rail and a wall of the housing, and a second groove positioned between the second rail and the wall of the charger housing.
- Each of the first rail and the second rail include an aperture extending therethrough.
- a fan is coupled within the housing adjacent the first connection interface.
- An air passage member includes a hollow body that has a first end and a second end spaced apart from the first end, the first end being coupled to the fan and the second end that extends through one of the walls.
- the charging system further includes a battery pack having a battery housing that has a longitudinal axis, first portion, and a second portion coupled to the first portion.
- the battery housing is configured to enclose a plurality of battery cells, and a second connection interface extends from a wall of the first portion and is symmetrical about the longitudinal axis.
- the second connection interface includes battery terminals positioned between a first rail and a second rail, a first groove positioned between the first rail and a wall of the first portion, and a second groove positioned between the second rail and the wall of the first portion.
- a first plurality of vent holes extends through the wall in the first portion adjacent the first rail, and a second plurality of vent holes extends through the wall in the first portion adjacent the second rail.
- the second connection interface of the battery pack is coupleable to the first connection interface such that aperture in the first rail of the first connection interface is in communication with the first plurality of vent holes and the aperture in the second rail of the first connection interface is in communication with the second plurality of vent holes.
- the fan is operable to suck an air flow into the housing of the charger from outside the housing and guide the air flow through the air passage member to the apertures in each of the first and second rails and the first and second plurality of vent holes such that the air flow enters the battery pack housing.
- a charger for charging a battery pack having a housing enclosing a plurality of battery cells and one or more vent holes includes a housing including a battery pack receiving portion and a separate charger electronics portion.
- the charger electronics portion includes a charger electronics enclosure.
- the charger further includes a battery pack interface supported on the battery pack receiving portion, and the battery pack interface includes charging terminals.
- a first plurality of vent holes is positioned in a first outer wall of the battery pack receiving portion adjacent the battery pack interface.
- a first cooling air passage extends though the battery pack receiving portion from the first plurality of vent holes to an opening in a second outer wall of the battery pack receiving portion, and a first fan is positioned in the battery pack receiving portion adjacent the first plurality of vent holes and is operable to move air from outside of the battery pack receiving portion into the first cooling air passage via the first plurality of vent holes.
- the charger further includes a printed circuit board including electrical components in electrical communication with the charging terminals. The printed circuit board is enclosed within charger electronics enclosure.
- a second plurality of vent holes is positioned in a third outer wall of the charger electronics portion.
- a second cooling air passage extends through the charger electronics portion from the second plurality of vent holes to an opening in a fourth outer wall of the charger electronics portion, and the second cooling air passage is in fluid communication with the charger electronics enclosure for removing heat generated by the electrical components and sealed from the first cooling air passage.
- a second fan is positioned in the charger electronics portion outside the charger electronics enclosure adjacent the second plurality of vent holes and operable to move air from outside charger electronics portion into the second cooling air passage via the second plurality of vent holes.
- FIG. 3 is a top view of the charger of FIG. 1.
- FIG. 4 is a bottom perspective of the charger of FIG. 1.
- FIG. 5 is a rear perspective of the charger of FIG. 1.
- FIG. 6 is a bottom perspective view of a portion of a housing of the charger of
- FIG. 7 is a top perspective view of the charger of FIG. 1, with portions of the housing removed and showing an air passage.
- FIG. 8 is another top perspective view of the charger of FIG. 1, with portions of the housing removed and showing an air passage and a fan.
- FIG. 17 is a perspective view of a battery charger according to another construction.
- FIG. 23 is another perspective view of the battery charger of FIG. 19 with a portion of the housing removed and showing a fan orientation.
- FIG. 24A is a perspective view of the battery charger with a portion of the housing removed and showing another fan orientation.
- the battery pack type may be defined by nominal voltage, current capacity, connection configuration (e.g., “tower” vs. “slide-on”), etc., of the battery pack 14A, 14B.
- the first battery pack 14A may include a high-power battery pack with a nominal voltage of about 12 volts (V) and having a tower-style configuration
- the second battery pack 14B may include a high-power battery pack with a nominal voltage of 18V and a slide-on configuration.
- the battery packs 14 A, 14B may be the same type of battery pack.
- the charger interface 200B defines an insertion axis D (FIG. 9) and includes rail members 220, 224 and a charger terminal block 228 (FIG. 1).
- the rail members 220, 224 are spaced apart, substantially parallel, and positioned on the inclined portion 138 of the front wall 110.
- An aperture 232, 236 extends through each of the rail members 220, 224.
- the apertures 232, 236 are each in communication with an interior 240 (FIG. 10) of the charger housing 100 via a first chamber 244 positioned within the housing 100.
- a groove 248, 252 is defined between the inclined portion 138 of the front wall 110 and the associated rail member 220, 224.
- the first air flow X or the reverse airflow may be used to cool the battery cells 42 during charging of the first battery pack 14B.
- the battery charger 600 includes a housing 750, 754 having a longitudinal axis J and a frame member 758 coupled to the housing.
- the housing 750, 754 includes a battery pack receiving portion 750 and a charger electronics portion 754 that is coupled to the battery pack receiving portion 750.
- the battery pack receiving potion 750 may be sealed with respect to the charger electronics portions 754.
- the first wall 770 includes an elongate opening 806 and a plurality of vent holes 810 extending therethrough.
- the elongate opening 806 has a closed end 814 adjacent the fourth wall 782 and an open end 818 adjacent the third wall 778.
- a charger interface 822 is positioned in the elongate opening 806, at least partially supported by the first wall 770, and configured to receive the battery pack interface 654.
- a first set of the plurality of vent holes 810 are positioned on one side of the elongate opening 806 and a second set of the plurality of vent holes 810 are positioned on an opposite side of the elongate opening 806.
- the second wall 774 includes a plurality of vent holes 826 (FIGS. 22 and 23) extending therethrough.
- a handle 830 extends from and is movable (e.g., pivotable) relative to the third wall 778.
- the insertion axis K is parallel to the rail members 864, 888.
- Charging terminals 896 extend from each portion 856, 884 of the terminal block 860.
- each of the fans 918 has an axis of rotation L that is positioned at a non-parallel angle relative to the insertion axis K.
- each of the fans 918 has an axis of rotation L that is perpendicular to the insertion axis K.
- the axes of rotation L of the fans 918 are oriented in parallel to one another, but in other or additional constructions, the axes of rotation K may be oriented in parallel or at a non-parallel angles relative to one another.
- a cooling air path or passage 922 extends from one or more of the plurality of vent holes 810 in the first wall 770 to one or more of the plurality of vent holes 826 in the second wall 774 through each of the fans 918. Accordingly, each of the fans 918 is operable to move cooling air between one or more of the vent holes 810 in the first wall 770 and one or more vent holes 826 in the second wall 774.
- Each of the respective first and second air passage members 932, 936 includes an outlet 948, 952 that is at or adjacent to and in communication with one or more of the second plurality of vent holes 826.
- air may be guided in a first direction (e.g., to the battery pack 654) through one of the air passages 932 and may be guided in a second direction (e.g., away from the battery pack 654) through the other of the air passages 936.
- one of the air passages 932, 936 may include a heating element or a cooling member 934 that is in electrical communication with the charger electronics.
- a movable valve or seal 935 selectively opens and closes the air passage 932a, 932b.
- the seal 935 is positioned between the fan 918 and the vent holes 810, but in other constructions, the seal 935 may be positioned elsewhere (e.g., within the air passage 932, 936).
- the heating element or cooling member 934 may be actuated to blow air that is higher (e.g., via the heating element) or lower (e.g., via the cooling element) than ambient air temperature into the battery pack 654 to respectively heat up the cells or cool the cells of the battery pack 654.
- one or both of the air passage members 932, 936 may be divided into separate air passages thereby creating a dual-air passage member.
- air may be guided in a first direction (e.g., to the battery pack 654) through one of the dual-air passages and may be guided in a second direction (e.g., away from the battery pack 654) through the other of the due-air passages 936.
- one of the dual-air passages may include the heating element or the cooling member 934 that is in electrical communication with the charger electronics, such that air is guided through the dual-air passages as discussed above with respect to FIG. 24C.
- the charger electronics portion 754 includes a cover 1000, a fan 1004 or blower (e.g., a DC blower), and a charger electronics housing 1008.
- the cover 1000 is formed from a plastic material and includes a rear wall 1012 (FIG. 27), atop wall 1016 (FIGS. 22, 23, 27), a bottom wall 1020 (FIG. 27), a first side wall 1024 (FIG. 23), and a second side wall 1028 (FIG. 22).
- Each of the walls 1016, 1020, 1024, 1028 is coupled to and extends from the rear wall 1012.
- the rear wall 1012 includes a first plurality of vent holes 1032 and one or more of the walls 1016, 1020, 1024, 1028 includes a second plurality of vent holes 1036.
- the second plurality of vent holes 1036 are in the bottom wall 1020, but in other constructions the second plurality of vent holes 1036 could be in the other walls, as well or alternatively.
- the charger electronics housing 1008 is constructed of metal and has a plurality of walls that define a sealed (e.g., fluid and debris) box-like structure that encloses the charger electronics 1050.
- the metal is aluminum, but other suitable metals may be used instead or in addition to aluminum.
- a first wall 1054 of the charger electronics housing 1008 includes a plurality of fins 1058 (or other heat dissipating members) extending therefrom and a second, opposite wall 1062 supports the charger electronics 1050.
- a plurality side walls 1062 extend from the first wall 1054 toward the second wall 1058. The plurality of side walls 1062 is coupled to the second wall to sealably (e.g., to enclose the charger electronics therein.
- the rail members 864, 888, and grooves 868, 892 are engageable with respective grooves 674, 678 and rails 666, 670 on the battery pack 614 to bring the charging terminals 896 into electrical and physical engagement with the battery terminals such that the charger 600 is able to charge the batteries of the battery pack 614.
- the vent holes 810 in the first wall 770 are configured to align and communicate with the respective first plurality of vent holes 682 and second plurality of vent holes 686 in the wall 650 of the first portion 634 of the battery pack 614.
- each of the fans 918 of the battery pack receiving portion 750 are operable to move cooling air between an interior of the battery pack 614 and an area outside of the charger 600 via the respective cooling air passage 922.
- the fans 918 are operable to suck ambient air through holes 702 in the battery pack 614, through the interior of the battery pack 614, and into the charger 600 (e.g., the battery pack receiving portion 750) via the respective plurality of vent holes 810 in the first wall 770 and expel the air through the respective plurality of vent holes 826 in the second wall 774 such that air can move through the battery pack 614 and be removed therefrom by flowing through the charger 600.
- the battery pack 654 completely covers or extends beyond the first wall 770 such that air is forced through the battery pack 654 and not around the battery pack 654.
- the terminal block 860 is not sealed relative to battery pack receiving portion 750 so water or other fluids may drain from the interior of the battery pack 654 and the charger interface 822 to the area outside of the charger 600 via the drain member 960.
- the charger electronics portion 754 has alternative configuration.
- the charger electronics portion 754 of FIG. 28 is similar to the charger electronics portion 754 of FIG. 26, and therefore only the differences between the charger electronics portions 754 of FIGS. 26 and FIG. 28 will be discussed.
- the air passage member 1100 has a first open end 1108 and a second open end 1112.
- the fan 1004 may be supported at either the first or second open ends 1108, 1112 of the air passage member 1100. In the illustrated embodiment, the fan is supported at the first open end 1108.
- the air passage member of FIG. 27 has a plurality of fins 1116 (or other heat dissipating members) that extend from one side across at least a portion of the air channel 1104.
- the air passage member 1100 is not completely enclosed as a side opposite the side wall defines an elongated opening. In other constructions, the side opposite the side wall may be defined a wall that may or may not have openings extending therethrough.
- the charger electronics housing of FIG. 28 is positioned within the cover 1000 and between the cover 10000 and battery pack receiving portion 750 such that the first end 1108 of the air passage member 1100, and therefore, the fan 1004 is positioned adjacent the first or second plurality of vent holes 1032, 1036 and the second end 1112 of the air passage member 110 is positioned adjacent the other of the first and second plurality of vent holes 1032, 1036.
- a cooling air passage 1140 is defined between the first or second plurality of vent holes 1036, 1036 in the cover 1000, the fan 1004, the second end of the air passage member 1112, and the other of the first or second plurality of vent holes 1032, 1036.
- the charger electronics portion 754 has alternative configuration.
- the charger electronics portion 754 of FIG. 29 is similar to the charger electronics portion 754 of FIG. 26 and 28, and therefore only the differences between the charger electronics portions of FIGS. 26, 28 and FIG. 29 will be discussed.
- the first side wall 1024 of the cover 1000 includes the first plurality of vent holes 1032 and the second side wall 1028 of the cover 1000 includes a second plurality of vent holes 1036.
- the charger electronics housing defines a first housing portion 1150 and a second housing portion 1154.
- the first housing portion 1150 includes the first wall 1054 and a portion of first and second side walls 1062 extending therefrom.
- the first and second side walls 1062 are on opposite sides of the housing 1008 from one another.
- Each of the first and second side walls 1062 defines a flange 1160 extending along the length of the respective wall 1062.
- a partition wall 1162 extends from the first wall 1054 between the first and second side walls 1062 and extends the length of the first and second side walls 1062.
- the partition wall 1162 of the first housing portion 1150 has a flange 1160 projecting therefrom and extending along the length of the wall 1162.
- the second housing portion 1154 includes the second wall 1058 and a portion of the first and second side walls 1062 extending therefrom.
- Each of the first and second side walls 1062 of the second housing portion 1154 have a coupling groove 1164 projecting therefrom and extending along the length of the respective wall 1062.
- a coupling groove 1164 extends form the second wall 1058 between the first and second side walls 1062 and extends the length of the first and second side walls 1062.
- a third side wall 1062 of the box-like structure of the charger electronics housing 1008 is coupled (e.g., by fasteners and the like) between the first and second walls 1054,
- the third side wall 1062 defines an aperture extending 1176 therethrough.
- a fourth side wall 1062 of the box-like structure of the charger electronics housing 1008 is coupled (e.g., by fasteners and the like) between the first and second walls 1054, 1058 and the first and second side walls 1062.
- the fourth side wall 1062 includes a plurality of vent holes 1180 extending therethrough.
- the partition wall 1162 extends between the third and fourth side walls 1062 of the charger electronics housing 1000.
- An interior of the charge electronics housing 1008 is divided into a first portion 1190 and a second portion 1194 by the partition wall 1162.
- the partition wall 1162 ensures that the first portion 1190 and the second portion 1194 are separated from one another.
- the first portion 1190 is completely enclosed by the partition wall 1162 and the other walls 1054, 1058, 1062 of the box-like structure of the charger electronics housing 1008.
- the charger electronics 1050 are positioned in the first portion 1190 and a potting compound fills the first portion.
- an auxiliary plate 1198 e.g., aluminum or other metal plate
- the second portion 1194 is enclosed by the partition wall 1162 and the other walls 1054, 1058, 1062 of the box-like structure of the charger electronics housing 1008.
- the aperture 1176 of the third side wall 1062 is positioned to be in communication and aligned with the second portion 1194 and accommodates the fan 1004, which is positioned within the second portion 1194.
- the plurality of vent holes 1180 of the fourth side wall 1062 is positioned to be in communication with the second portion 1194 such that the plurality of vent holes 1180 is positioned on the opposite side of the charger electronics housing 1008 from the fan 1004.
- the partition wall 1162 includes fins 1202 that extend therefrom into the second portion 1194.
- the charger electronics housing 1008 is positioned within the cover 1000 and between the cover 1000 and battery pack receiving portion 750 such that the fan 1004 is positioned adjacent the first or second plurality of vent holes 1032, 1036 and the plurality of vent holes 1180 in the charger electronics housing 1008 is positioned adjacent the other of the first and second plurality of vent holes 1032, 1036.
- a cooling air passage 1206 is defined between the first or second plurality of vent holes 1032, 1036 in the cover 1000, the fan 1004, the plurality of vent holes 1180 in the charger electronics housing 1008, and the other of the first or second plurality of vent holes 1032, 1036.
- each of the fans 1004 suck ambient air from an area adjacent the first or second plurality of vent holes 1032, 1036 (depending on which the fan 1004 is positioned at or adjacent to) into the charger electronics portion 754 via the respective first or second plurality of vent holes 1032, 1036 and expel the air through the opposite first or second plurality of vent holes 1032, 1036.
- the fan 1004 sucks ambient air from an area adjacent the first or second plurality of vent holes 1032, 1036 (depending on which the fan 1004 is positioned at or adjacent to) into the charger electronics portion 754 via the respective first or second plurality of vent holes 1032, 1036 (depending on which the second end 1112 of the air channel 1104 is positioned at or adjacent to) and expel the air through the opposite first or second plurality of vent holes 1032, 1036 such that cooling air moves through the air channel 1104.
- the fan 1004 sucks ambient air from an area adjacent the first or second plurality of vent holes 1032, 1036 (depending on which the fan 1004 is positioned at or adjacent to) into the charger electronics portion 754 via the respective first or second plurality of vent holes 1032, 1036 (depending on which plurality of vent holes 1180 in the charger housing 1008 is positioned at or adjacent to) and expel the air through the opposite first or second plurality of vent holes 1032, 1036 such that cooling air moves through the second portion 1194 of the charger electronics housing 1008.
- the cooling air passage guides cooling air along an axis M, which is oriented at a non-parallel angle relative to the insertion axis K.
- the axis M is oriented at a perpendicular angle to the insertion axis K.
- each of the fans 918, 1004 is a multi-speed fan operable to rotate at more than one speed.
- the speed at which each of the fans 918, 1004 rotates may be determined based on a temperature of one or more of the charger electronics 1050 or the battery pack 614.
- the fans 918, 1004 at full speed, generate an air flow of between about 13.6 m3 /hour and about 25.5 m3/hour.
- the fans 918, 1004 may generate an air flow of about 20.4 cubic feet per minute (CFM) and up to about 35 m3/hour or less.
- the fans 918, 1004 may generate an air flow that is less than or greater than 31 CFM.
- the fans 918, 1004 may use 31.64CFM/amp on each cell in an unloaded condition.
- constructions discussed herein are configured to move air through the respective charger and the battery pack. Other constructions may be configured to move other cooling fluids through the respective charger and battery pack.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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KR1020227021831A KR20220114565A (en) | 2019-12-03 | 2020-12-03 | Battery pack and charger system |
JP2022529959A JP7423775B2 (en) | 2019-12-03 | 2020-12-03 | Battery pack and charger system |
EP20895043.6A EP4070433A4 (en) | 2019-12-03 | 2020-12-03 | Battery pack and charger system |
AU2020395173A AU2020395173B2 (en) | 2019-12-03 | 2020-12-03 | Battery pack and charger system |
CN202080090170.7A CN114846718A (en) | 2019-12-03 | 2020-12-03 | Battery pack and charger system |
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US201962942889P | 2019-12-03 | 2019-12-03 | |
US62/942,889 | 2019-12-03 |
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WO2021113426A1 true WO2021113426A1 (en) | 2021-06-10 |
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PCT/US2020/062975 WO2021113426A1 (en) | 2019-12-03 | 2020-12-03 | Battery pack and charger system |
Country Status (7)
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US (2) | US11670808B2 (en) |
EP (1) | EP4070433A4 (en) |
JP (1) | JP7423775B2 (en) |
KR (1) | KR20220114565A (en) |
CN (1) | CN114846718A (en) |
AU (1) | AU2020395173B2 (en) |
WO (1) | WO2021113426A1 (en) |
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WO2022173344A1 (en) * | 2021-02-09 | 2022-08-18 | Husqvarna Ab | Charger |
WO2023114280A1 (en) * | 2021-12-15 | 2023-06-22 | Milwaukee Electric Tool Corporation | Battery charger with cooling and sealing construction |
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WO2021113426A1 (en) * | 2019-12-03 | 2021-06-10 | Milwaukee Electric Tool Corporation | Battery pack and charger system |
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Also Published As
Publication number | Publication date |
---|---|
AU2020395173B2 (en) | 2023-06-01 |
EP4070433A1 (en) | 2022-10-12 |
JP2023506386A (en) | 2023-02-16 |
JP7423775B2 (en) | 2024-01-29 |
EP4070433A4 (en) | 2024-04-03 |
US20210167430A1 (en) | 2021-06-03 |
AU2020395173A1 (en) | 2022-06-16 |
US20230261271A1 (en) | 2023-08-17 |
CN114846718A (en) | 2022-08-02 |
US11670808B2 (en) | 2023-06-06 |
KR20220114565A (en) | 2022-08-17 |
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