New! View global litigation for patent families

US20080100261A1 - Battery charger - Google Patents

Battery charger Download PDF

Info

Publication number
US20080100261A1
US20080100261A1 US11969128 US96912808A US2008100261A1 US 20080100261 A1 US20080100261 A1 US 20080100261A1 US 11969128 US11969128 US 11969128 US 96912808 A US96912808 A US 96912808A US 2008100261 A1 US2008100261 A1 US 2008100261A1
Authority
US
Grant status
Application
Patent type
Prior art keywords
battery
charger
housing
surface
charging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11969128
Inventor
Kevin Glasgow
David Rozwadowski
Jeffrey Zeiler
George Santana
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Milwaukee Electric Tool Corp
Original Assignee
Milwaukee Electric Tool Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Images

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H02J7/0045Circuit 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging several batteries simultaneously or sequentially
    • H02J7/0027Stations for charging mobile units, e.g. of electric vehicles, of mobile telephones

Abstract

A battery charger. The battery charger includes a housing having an outer surface, a battery being supportable on the outer surface, a charging circuit supported by the housing and electrically connectable to a power source and the battery, and a protective structure connected to and extending from the outer surface of the housing, the protective structure extending from the outer surface beyond the battery.

Description

    RELATED APPLICATIONS
  • [0001]
    The present application is a continuation of co-pending U.S. patent application Ser. No. 10/289,621, filed on Nov. 7, 2002; which claims the benefit of Provisional Application Ser. No. 60/379,068, filed May 9, 2002, and Provisional Patent Application Ser. No. 60/344,431, filed Nov. 9, 2001, and is a continuation-in-part of co-pending Design patent application Ser. No. 29/160,301, filed May 7, 2002.
  • BACKGROUND
  • [0002]
    Typically, a battery charger includes a charger housing and a charging circuit supported by the charger housing that is electrically connectable to a power source. A battery is supported by the charger housing and electrically connected to the charging circuit so that power is selectively supplied to the battery to charge the battery. The battery is connected to the charging circuit by charger terminals supported on the charger housing.
  • SUMMARY
  • [0003]
    Existing battery chargers and their individual components are not suited for heavy-duty use commonly found at a work site including impacts from falling objects or from the battery charger falling. Also, existing battery chargers and their individual components are not suited for outdoor use including being exposed to weather (i.e. sun, rain, wind, etc.) and other contaminants (i.e. dirt, sand, gravel, mud, sawdust, etc.). Weather and contaminants can damage the components of the battery charger and may render the battery charger inoperable.
  • [0004]
    In existing battery chargers, the charging terminals are typically exposed to the outside environment. Contaminants (such as dirt, sand, mud, sawdust, etc.) may block the charger terminals and prevent electrical connection between the charger terminals and the battery (and charging circuit) or cause a short circuit of the charging circuit. Also, with existing battery chargers, the charge status indicators are not easily seen in outdoor sunlight.
  • [0005]
    Existing battery chargers may employ an inefficient charging routine when charging batteries. Some battery chargers maintain charging even after the battery has reached full charge. Such a routine leads to unnecessary heating of the battery, therefore, decreasing the cycle life of the battery. Other battery chargers terminate charging when a pre-set time limit is reached. This routine can also result in overheating and a decrease in battery cycle life or may result in a battery not being fully charged when the charging routine has terminated. Existing multiple-port battery chargers include a single charging circuit for all the multiple ports and for all the batteries being charged such that a failure of any component of the charging circuit renders all of the charging ports inoperable.
  • [0006]
    The present invention provides a battery charger which substantially alleviates one or more of the above-described and other problems with existing battery chargers. In some aspects, the battery charger is a multiple-port battery charger for charging power tool batteries. In some aspects, the battery charger is a heavy-duty battery charger designed to be used outdoors and/or in harsh working conditions.
  • [0007]
    More particularly, in some aspects, the invention provides a battery charger including a housing having an outer surface, a battery being supportable on the outer surface, a charging circuit supported by the housing and electrically connectable to a power source and to the battery, and protective structure connected to and extending from the outer surface of the housing, the protective structure extending from the outer surface beyond the battery.
  • [0008]
    Also, in some aspects, the invention provides a battery charger including a housing having an outer surface, a battery being supportable on the outer surface, a charging circuit supported by the housing and electrically connectable to a power source and to the battery, a base connected to the housing for supporting the battery charger on a surface, the base extending beyond the outer surface of the housing and beyond the battery, and a bar connected to the housing at a first end of the housing, the bar extending beyond the outer surface of the housing and beyond the battery.
  • [0009]
    In addition, in some aspects, the invention provides a battery charger including a housing, a charging circuit supported by the housing and electrically connectable to a power source and to a battery, a vent defined by the housing, the vent releasing heated air from the housing and impeding entry of contaminants into the housing, the vent causing the heated air to turn downwardly turn through the vent before being released from the housing, and a drain defined by the housing, the drain releasing contaminants from the housing.
  • [0010]
    Further, in some aspects, the invention provides a battery charger including a housing, a charging circuit supported by the housing and electrically connectable with a power source, and a battery port connected to the housing and operable to support a battery. The battery port includes a charger terminal electrically connectable to the charging circuit to electrically connect the battery to the charging circuit, a charger terminal support defining an opening, the terminal being supported in the opening, and a charger terminal cover supported by the battery port, the terminal cover closing the opening when the battery is not supported by the battery port.
  • [0011]
    In addition, in some aspects, the invention provides a battery charger including a housing, a charging circuit supported by the housing and electrically connectable to a power source and a battery, an LED positioned at least partially outside of the housing and electrically connected to the charging circuit, the LED being operable to display a charge status of the battery, and a translucent cover connected to the housing and at least partially enclosing the LED.
  • [0012]
    Also, in some aspects, the invention provides a battery charger including a charging routine having a temperature rate termination technique. This charging routine is designed to function with, for example, Nickel-Metal Hydride (NiMH), Nickel-Cadmium (NiCd), Lithium-ion (Li-ion) etc. battery cells and includes a maintenance routine and boost routine that follows the normal charge execution.
  • [0013]
    In addition, in some aspects, the invention provides a multiple-port battery charger including a separate and dedicated charging circuit for each charging port. This configuration allows the remaining charging circuits to be operable if one charging circuit should fail.
  • [0014]
    In some aspects of the invention, the heavy-duty construction of the battery charger allows the battery charger and its components to withstand impacts after falling several feet or being impacted by other objects, in addition to protecting an attached battery from jarring loose as a result of the impact.
  • [0015]
    In some aspects of the invention, the contaminant-resistant air vents prevent any liquid or solid contaminants from entering the charger housing. Also, a series of drains are incorporated within the charger to purge any contaminant that may enter the housing, and the suspended charging circuits are kept out of contact from such contaminants.
  • [0016]
    In some aspects of the invention, the terminal cover prevents any contaminants from contacting the charger terminals when a battery is not connected with the battery charger. The cover also provides a sweeping action to keep clean the interconnection between the charging terminals and the battery.
  • [0017]
    In some aspects of the invention, the LED charge status indicators are bright enough to see in the outdoor sunlight and are viewable from a long distance about a wide range of viewing angles.
  • [0018]
    In some aspects of the invention, the temperature rate termination technique of the charging routine reduces charge time by several minutes, reduces heat due to charging, and/or increases the cycle life of the battery.
  • [0019]
    In some aspects of the invention, the independent charging circuits provide the user increased reliability such that a failure of one charging circuit does not result in a complete failure of the multiple port battery charger.
  • [0020]
    Independent features and independent advantages of the present invention will become apparent to those skilled in the art upon review of the following detailed description, claims and drawings.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0021]
    FIG. 1 is a front perspective view of a battery charger embodying the present invention.
  • [0022]
    FIG. 2 is a front view of the battery charger shown in FIG. 1.
  • [0023]
    FIG. 3 is a rear view of the battery charger shown in FIG. 1.
  • [0024]
    FIG. 4 is a top view of the battery charger shown in FIG. 1.
  • [0025]
    FIG. 5 is a bottom view of the battery charger shown in FIG. 1.
  • [0026]
    FIG. 6 is a right side view of the battery charger shown in FIG. 1.
  • [0027]
    FIG. 7 is a left side view of the battery charger shown in FIG. 1 with the battery removed.
  • [0028]
    FIG. 8 is a top perspective view of the base separated from the battery charger shown in FIG. 1.
  • [0029]
    FIG. 9 is a bottom perspective view of the base shown in FIG. 8.
  • [0030]
    FIG. 10 is a partial cross-sectional view of the battery charger taken generally along line 10-10 in FIG. 2 with the battery removed.
  • [0031]
    FIG. 11 is an exploded view of the battery charger shown in FIG. 1.
  • [0032]
    FIG. 12 is a rear view of an interior portion of the front shell of the housing and showing the charging circuits.
  • [0033]
    FIG. 13 is a cross-sectional view of a portion of the battery charger taken along lines 13-13 in FIG. 4.
  • [0034]
    FIG. 14 illustrates a battery port as viewed from the inside of the front housing.
  • [0035]
    FIG. 15 is a cross-sectional view of the battery port taken generally along line 15-15 in FIG. 14.
  • [0036]
    FIG. 16 is a cross-sectional view of the battery port taken generally along line 16-16 in FIG. 15 and showing the charging terminals and their respective electrical leads extending away from the terminals.
  • [0037]
    FIG. 17 is a front perspective view of the battery port.
  • [0038]
    FIG. 18 is an exploded perspective view of the battery port of FIG. 17.
  • [0039]
    FIG. 19 is another exploded perspective view of the battery port of FIG. 17.
  • [0040]
    FIG. 20 is a rear perspective view of the battery port shown in FIG. 17 and showing mounting hardware and components involved with mounting the port to the housing.
  • [0041]
    FIG. 21 is a rear perspective view similar to that of FIG. 20 with portions removed and showing the pivoting structure of the terminal cover.
  • [0042]
    FIG. 22 is a front perspective view of the terminal cover removed from the battery port.
  • [0043]
    FIG. 23 is a rear perspective view of the terminal cover shown in FIG. 22.
  • [0044]
    FIG. 24 is an enlarged view of a portion of the battery charger shown in FIG. 10.
  • [0045]
    FIG. 25 is a front view of an interior portion of the rear shell of the housing.
  • [0046]
    FIG. 26 is a rear view of an exterior portion of the rear shell shown in FIG. 25.
  • [0047]
    FIG. 27 is a top perspective view of the battery.
  • [0048]
    FIG. 28 is a flow chart illustrating a software functional description of the acts involved with charge execution.
  • [0049]
    FIG. 29 is an exploded perspective view of an LED charge status indicator assembly.
  • [0050]
    FIG. 30 is a rear view of a mounting board including a charging circuit and showing the LED charge status indicator electrically connecting with the charging circuit.
  • [0051]
    FIG. 31 is a cross-sectional view of the LED charge status indicator assembly taken along lines 31-31 of FIG. 10.
  • [0052]
    Before an embodiment of the invention is explained in detail, it is to be understood that the invention is not limited in its application to the details of the construction and the arrangements of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or carried out in various ways. Also, it is understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.
  • DETAILED DESCRIPTION
  • [0053]
    A battery charger 10 embodying aspects of the invention is illustrated in FIGS. 1-11. In general, in some aspects, the battery charger 10 is constructed for heavy-duty use in a harsh working environment (for electrical equipment) such as outdoor construction sites, machine shops, manufacturing floors, etc. The charger 10 is operable to support and charge batteries 14, such as, for example, 12V, 14.4V, 18V or similar power tool or other equipment batteries 14 of various chemistries (NiCd, NiMH, Li-ion, etc.). Generally, the batteries 14 include a top surface 16 a, a bottom surface 16 b, a front surface 16 c and two side surfaces 16 d to define a generally rectangular shape. However, the batteries 14 may define any number of shapes.
  • [0054]
    As shown in FIGS. 10-11, the charger 10 includes a housing 18 manufactured of a plastic material as a two-piece design. A first shell 22 is connected to a second shell 26 to form a cavity 30 therebetween. A tongue 34 and a groove 38 are utilized to mate the two shells 22, 26, and an o-ring 42 is positioned between the two shells 22, 26 to seal the interface between the two shells 22, 26. The two shells 22, 26 are also molded to define a low spot 46 at the bottom of the housing 18 when the shells 22, 26 are mated. A drain 50 is positioned in the low spot 46 to release any contaminant (i.e. dirt, sand, gravel, sawdust, metal shavings, water, oil, grease, etc.) that may enter the cavity 30.
  • [0055]
    As shown in FIGS. 10-12, charging circuits 58 are supported by suspended and cushioned mounting boards 62 housed within the cavity 30. The mounting boards 62 are made of a flame-retardant material, such as a VØ-rated plastic. The charging circuits 58 and the mounting boards 62 are formed as an assembly, and the charging circuits 58 are potted in the flame retardant material to seal and insulate the components of the charging circuits 58. The components of the charging circuits 58 are supported on the mounting boards 62 with required spacing, sealing and insulation to meet UL requirements.
  • [0056]
    The cushioned mounting configuration of the mounting boards 62 protects the charging circuits 58 during an impact. Such cushioning may be provided by any elastically deformable material (not shown), such as, for example, rubber washers, positioned between the board 62 and housing 18.
  • [0057]
    This mounting configuration also helps minimize exposure of the charging circuits 58 to any contaminant (e.g. dirt, sand, gravel, sawdust, metal shavings, water, oil, grease, etc.) that may enter the cavity 30. Any contaminant entering the cavity 30 will come to rest along an interior wall or adjacent walls of the housing 18, depending on the orientation of the housing 18. Therefore, with the charging circuits 58 suspended in the middle of the housing 18, it is unlikely any contaminants will contact or come to rest on the charging circuits 58.
  • [0058]
    The charging circuits 58 are connectable to a power source (not shown), such as an AC power source through a power cord 64, or a DC power source. Charger terminals 66 on battery ports 70 connect the battery 14 to the charging circuit 58.
  • [0059]
    As shown in FIG. 12, the charger 10 utilizes a separate and dedicated charging circuit 58 for each battery port 70. With this configuration, if one charging circuit 58 fails, the remaining charging circuits 58 will be operable, and the charger 10 will not be rendered totally inoperable. Each charging circuit 58 may be similar to the charging circuit described in U.S. Pat. No. 6,222,343, issued Apr. 24, 2001, and U.S. patent application Ser. No. 09/672,620, filed Sep. 29, 2000, now U.S. Pat. No. 6,456,035, issued Sep. 24, 2002, which are hereby incorporated by reference.
  • [0060]
    As shown in FIGS. 10-11, air vents 74 are defined in the lower part of the first shell 22, and air vents 78 are defined in the upper part of the second shell 26. The air vents 74, 78 include ascending and stepped passageways 82 into the cavity 30. Structure defining each passageway 82 includes an outer lip 84, a spacer portion 86, which may have a substantially flat surface, and an inner lip 90 toward the end of the portion 86. This structure helps to prevent any solid (i.e. dirt, sand, sawdust, metal shavings, etc.) or liquid (i.e. water, oil, grease, etc.) contaminants from entering the cavity 30. The outer lip 84 will deflect contaminants. To enter the cavity 30, the structure of the air vents 74, 78 requires any contaminant to first penetrate the exterior of the housing 18, move along the substantially flat surface of the portion 86, and then ascend past the level defined by the inner lip 90. This tortuous path prevents unforced entry of any solid or liquid contaminants into the housing 18. However, if contaminants were to enter the cavity 30, such contaminants would be released through the drain 50.
  • [0061]
    Generally, during operation of the charger 10, heat is generated by the charging circuits 58. Through unforced convection, cooling air is drawn through the air vents 74 into the cavity 30 and flows across the heated charging circuits 58. The cooling air is heated by the charging circuits 58, causing the heated air to rise and escape the cavity 30 through the air vents 78.
  • [0062]
    In other constructions (not shown), the charger 10 may utilize electrically operated fans to cool the heated charging circuits 58 rather than unforced convection through air vents 74, 78. Also, heat removal elements (not shown) such as, for example, heat sinks, heat pipes, etc. may be incorporated into the battery charger 10 to draw heat from the charging circuits 58.
  • [0063]
    As shown in FIG. 11, the housing 18 is mounted to a base 94 which is designed to buffer and cushion the housing 18 along the edges of the base 94. In the illustrated construction, the base 94 is blow molded from a high density polyethylene (HDPE) which is a very strong and impact-resistant material. This material selection allows the base 94 to more effectively absorb the energy associated with an impact. In the illustrated construction, uniform wall thickness of about 0.100″ around the base 94 prevents its collapse (especially near the corners) when the base 94 is impacted after a fall or some other impacting event.
  • [0064]
    As shown in FIG. 8, the base 94 also includes a drain 98 positioned at a low spot 102 molded into the base 94. The drain 50 in the housing 18 and the drain 98 in the base 94 are in fluid communication but are offset from each other so that direct access to the cavity 30 through the drains 50, 98 is inhibited. As shown in FIG. 9, the drain 98 extends through the base 94 so that any contaminant that enters the battery charger 10 can be released.
  • [0065]
    As shown in FIGS. 1, 11 and 13, a handle 106 is connected to both the housing 18 and the base 94. The handle 106 is generally positioned towards the front of the charger 10 where the battery 14 attaches to the battery port 70. The handle 106 includes upper portions 110 connected to the housing 18 through impact-absorbing bumpers 114 and lower portions 118 connected to the base 94. The bumpers 114 are designed to both absorb and dampen impact energy. The bumpers 114 are made of an elastomeric material, such as polyurethane or natural rubber, with both spring and damping characteristics which allows this to happen. The bumpers 114 include channels 120 defined therein. The channels 120 extend around the perimeter of the bumpers 114, and allow the bumpers 114 to more easily compress upon being impacted. An ergonomic grip 122 is centrally positioned on the handle 106 to provide a comfortable, sure and steady grip on the handle 106. The grip 122 may include an elastic, non-slip material covering to provide comfort while the battery charger 10 is carried. In the illustrated construction, the handle 106 is made of two halves connected by the grip 122. However, in other constructions (not shown), the handle 106 may be made of a single component, such as, for example, a bar, having the grip 122 overmolded or integrally formed with the handle 106.
  • [0066]
    The handle 106 allows the user to carry the battery charger 10 to and from a work site, with or without batteries 14 connected to the battery charger 10. As shown in FIG. 6, an attached battery 14 is generally encompassed by a boundary defined by the base 94 and handle 106. As a result, the handle 106 also functions as a “roll bar,” or protective structure. More particularly, the lower portions 118 of the handle 106 protect the front surface 16 c of the battery 14 from being impacted by an object or surface wider than the distance between the lower portions 118 of the handle 106. Similarly, the lower portions 118 protect the side surfaces 16 d from being impacted by an object or surface wider than the distance between the housing 18 and the lower portions 118. The base 94 protects the bottom surface 16 b of the battery 14 from being impacted during a fall or other impacting event.
  • [0067]
    While the top surface 16 a of the battery 14 is generally unimpeded to allow easy connection and removal of the battery 14, the upper portion 110 may provide some protection to the top surface 16 a of the battery 14 from being impacted by an object or surface wider than the distance defined by the upper portion 110. In other constructions (not shown), an additional top cover (not shown) may be provided to protect the top surface 16 a of the battery 14.
  • [0068]
    If the battery charger 10 were to fall or be impacted during movement around a work site, a combination of the base 94 and handle 106 would help prevent the battery 14 from jarring loose upon impact because the handle 106 or base 94 will be impacted first. Therefore, the handle 106 and the base 94 protects stored batteries 14 on the charger 10 from impacts.
  • [0069]
    In the illustrated construction, the bar-like handle 106 provides protective structure of the charger 10. In other constructions (not shown), the protective structure may include a solid wall that may extend from the outer surface of the housing 18 and surround surfaces of the batteries 14 to recess the batteries 14 into the wall, while allowing access to the batteries 14.
  • [0070]
    In yet other constructions (not shown), a cover or multiple covers may enclose or partially enclose the batteries 14 to protect them from impact. The cover or multiple covers may be removable/retractable manually or with insertion of the battery 14.
  • [0071]
    The bumpers 114 also absorb some of the energy upon impact, thereby decreasing the chance of jarring loose an attached battery 14 and decreasing the chance of breaking the charger 10 or components of the charger 10. As shown in FIG. 4, rear bumpers 126 and side bumpers 130 are also utilized to help protect the rear and sides of the housing 18, respectively. The rear and side bumpers 126, 130 are shown as a one-piece construction that is fastened to the housing 18. The rear and side bumpers 126, 130 are made of an impact-resistant and energy absorbing material, such as HDPE.
  • [0072]
    As shown in FIG. 11, openings are molded into the first shell 22 to accommodate multiple battery ports 70. In the illustrated construction, three battery ports 70 are provided by the battery charger 10. In other constructions (not shown) and in some aspects of the invention, the battery charger 10 may include fewer or more than three battery ports 70. As shown in FIG. 17, each battery port 70 includes a battery mounting portion 138, a terminal assembly 142, and a mounting portion 146. The battery mounting portion 138 includes battery port projections 150 to guide the battery 14 as the battery 14 engages with the port 70. The battery port projections 150 engage matching battery grooves 154 (shown in FIG. 27) on the battery 14 to provide positive alignment with and support on the port 70. Similarly, battery projections 155 engage matching battery port grooves 156 to provide positive alignment with and support on the port 70. As shown in FIGS. 14-16, a series of charger terminals 66 (part of the terminal assembly 142) are recessed within openings in the terminal supports 158 on the port 70. Electrical leads 162 connect the charging circuits 58 with the terminals 66 of a respective port 70. The mounting portion 146 further includes fasteners 166 that connect the port 70 with the housing 18.
  • [0073]
    The ports 70 are connected to the housing 18 in a sturdy manner such that if the charger 10 falls with the battery 14 attached, the associated port 70 will not break off the housing 18. The battery ports 70 are designed to survive a fall from about at least 4 feet with an attached battery 14 without breaking off the housing 18.
  • [0074]
    At least portions of the battery charger 10 through which power is transferred are formed of flame-retardant material, such as VØ rated plastic. These portions may include the charging circuits 58 and the mounting board 62 assembly and the battery ports 70. Because of this, other portions of the housing 18 may be formed of other materials.
  • [0075]
    In the illustrated construction, as explained in U.S. Pat. Nos. 6,222,343 and 6,456,035, the battery 14 supplies power to the charging circuit 58 to initiate charging. Even with the battery charger 10 connected to a power source, no power is provided at the terminals 66 if the battery 14 is not connected to the terminals 66. Therefore, if the battery 14 is not attached to a port 70, there is zero potential between the terminals 66 of that respective port 70. This helps ensure the charging circuit 58 cannot be shorted out when the battery 14 is not attached to the port 70 and reduces the risk of electrical shock when the battery 14 is not attached.
  • [0076]
    As shown in FIGS. 17-21, each battery port 70 also includes a terminal cover 170 that is, in the illustrated construction, spring-biased to cover the terminal support 158. As shown in FIGS. 22 and 23, the terminal cover 170 includes a hood 174 having a mounting stem 178 on each side. A ramp 182 is positioned on each stem 178 between the hood 174 and a pivot 186, at which the cover 170 is attached to the port 70. FIGS. 15 and 20-21 illustrate the cover 170 assembled with the port 70. Biasing members, such as, in the illustrated construction, torsion springs 190, are positioned between the port 70 and the mounting stems 178 to bias the hood 174 to a covered position over the openings in the terminal supports 158.
  • [0077]
    In the illustrated construction, the action of sliding the battery 14 onto the battery mounting portion 138 causes the terminal cover 170 to pivotally retract to uncover the openings in the terminal supports 158 and expose the terminals 66 to the battery 14. Specifically, the battery mounting portion 138 includes an opening 194 through which the ramps 182 project. The battery projections 155 engage the ramps 182 upon engaging the battery mounting portion 138. The ramps 182 include a slope sufficient to cause the terminal cover 170 to pivot against the biasing force of the springs 190, thereby exposing the terminal supports 158 and the terminals 66 to the battery 14. When the battery 14 is removed, the springs 190 force the cover 170 to pivot back over the terminal supports 158. The biasing force is sufficient to close the cover 170 without preventing attachment of the battery 14.
  • [0078]
    As shown in FIG. 10, the terminal cover 170 retracts into the cavity 30 when actuated by battery 14 insertion. The cover 170 moves along a path to sweep away contaminants and to clear the interconnection between the port 70 and the battery 14. The terminal cover 170 also helps minimize the terminals 66 exposure to the outside environment. When closed, the cover 170 deflects contaminants (i.e. dirt, dust, sand, water, oil, grease, etc.) from adhering to the terminals 66 and adversely affecting the electrical connection between the charging circuit 58 and the battery 14.
  • [0079]
    In alternate constructions (not shown) and in some aspects of the invention, the terminal cover 170 may move in a different manner, such as linearly sliding away from the terminal supports 158, rather than pivoting away from the terminal supports 158 upon the battery 14 engaging the battery mounting portion 138. Also, the terminal cover 170 may be operable by the user, such as by depressing a button to retract the terminal cover 170.
  • [0080]
    As shown in FIG. 28, a plurality of charge termination protocols, including a temperature rate (“TR”) termination protocol, and firmware modules, including a trickle module 198, a charge module 202, and an equalization module 206, provide control of battery charging.
  • [0081]
    The TR charge termination protocol monitors the rate of temperature increase of a battery 14 during a charging cycle and terminates the charge flow when the battery 14 reaches a predetermined rate temperature change. The TR protocol also accounts for thermal lagging which causes the battery 14 to continue heating after removal of the charging current. The TR protocol provides a reduction in battery charge time, a control of heat increase due to charging, and an increase in battery life.
  • [0082]
    The firmware executes code that monitors the normal charge cycle of a battery 14. The charge cycle may be terminated by the TR termination protocol as previously described. Termination of the normal charge cycle results in execution of code pertaining to the trickle module 198. The trickle module 198 is operable to set a “trickle” flag in software that corresponds to termination of the normal charge cycle and initiation of the trickle module 198. Setting the trickle flag initiates the charge module 202 and the equalization module 206. The charge module 202 is operable to impose a maintenance charge on the battery 14 whereby a current pulse is applied to the battery 14 for approximately five seconds every two minutes.
  • [0083]
    The equalization module 206 executes code that allows the battery 14 to rest and cool for approximately fifteen minutes and sets a time limit for the equalization to occur. If the equalization module 206 does not execute within the time limit, the module terminates and the charge module 202 continues the maintenance charge. While within the time limit, a sensor monitors the temperature of the battery 14. If the temperature is in an acceptable range, a “boost” flag is set in software. Setting the boost flag initiates a boost charge cycle, for which the maximum duration is set by a boost timer. The boost timer is typically 5 minutes, however, other values are possible depending on the type and capacity of the battery 14. Either the boost timer or one of the charge termination protocols, such as the TR protocol, is operable to terminate the boost charge cycle. If the boost timer expires before a charge a termination protocol executes, the equalization module 206 terminates and the charge module 202 continues the maintenance charge.
  • [0084]
    The equalization module 206 executes once per charging cycle and serves to charge the battery toward 100% of rated charge capacity. The TR termination protocol controls the charging current level during execution of the equalization module 206. The rate of heating is typically lower than seen during the normal battery charge cycle. Supplying a charge flow at a reduced heating rate increases the charge of the battery 14 toward maximum capacity while minimizing the heating stress imposed on the battery 14 by the charger.
  • [0085]
    For example, with Nickel metal-Hydride (“NiMH”) batteries, a NiMH battery is charged at a normal current level (about 3.0 amps) using the TR termination protocol. The expected temperature at the point of charge termination should be about 40 degrees Celsius, or about 15 degrees above the ambient air temperature. Due to thermal lagging, the NiMH battery may continue to heat for between about 15-30 minutes after charge termination, where an additional 5-7 degree Celsius rise is usually experienced.
  • [0086]
    The equalization routine 206 includes the following operating steps upon TR charge termination. If the battery is left in the charger, the battery will eventually cool. After cooling, the battery is between about 90-95% charge capacity. When the battery has cooled below 30 degrees Celsius, the equalization routine 206 executes code that initiates further charging at a specific charge rate, such as, for example, a rate that provides a one degree Celsius battery temperature increase per minute. Using this routine 206, the NiMH battery is capable of accepting the remaining 5-10% of charge capacity.
  • [0087]
    As shown in FIGS. 29-31, charge status indicators, including light-emitting diodes (“LED”) 210, are electrically connected with each charging circuit 58 to relay the charging status of each battery 14 to the user. The LEDs 210 are designed to emit an amount of light necessary to overcome the intensity of outdoor sunlight. The LEDs 210 are positioned outside of the housing 18 so that the outer perimeter 214 is generally viewable from any direction relative to the housing. For example, if the charger 10 was positioned on a surface at eye level (in which the top side of the charger 10 is not viewable), the outer perimeters 214 of the LEDs 210 are still viewable because the LEDs 210 project from the top side of the housing. Each LED 210 also includes an LED cover 218 that encloses the portion of the LED 210 that projects from the housing 18. The covers 218, in addition to protecting the LEDs 210, also diffuse the light emitted by the LEDs 210 to increase the viewable distance and viewable angle of the LEDs 210. A gasket 222 is positioned between the cover 218 and the housing 18 to help prevent contamination from entering the housing 18 through the openings in the housing 18 for the LEDs 210.
  • [0088]
    In other constructions, the LEDs 210 may be positioned on any viewable surface of the housing 18, rather than the top surface of the housing 18. In other constructions (not shown), other visual indicators such as, for example, a potentiometer-based needle or a liquid crystal display window to provide digital charge status information, may be provided.
  • [0089]
    In other constructions (not shown) and in some aspects of the invention, the charger 10 may utilize an audio indicator rather than a visual indicator to relay battery charge status to the user. Such audio indicators may include electronic bells, chimes, a pre-recorded voice message, etc.
  • [0090]
    It should be understood that some aspects of the invention may be incorporated into other types of electrical equipment, such as, for example, electric power tools, audio components, etc. For example, the heavy-duty construction may be incorporated into audio components and other relatively-less durable electronic equipment for use in harsh working environments. Also, suspended, cushioned and/or sealed electrical circuits may be incorporated into audio components and such equipment. In addition, independent features of the invention such as, for example, contaminant-resistant air vents, contaminant drains, movable electrical terminal covers, and/or protruding LEDs may be incorporated into electrical equipment such as, for example, electric power tools, generators, audio equipment, communication equipment, etc.
  • [0091]
    One or more independent features and independent advantages are set forth in the claims.

Claims (21)

  1. 1. A battery charger comprising:
    a housing having an outer surface, a battery being supportable on the outer surface;
    a charging circuit supported by the housing and electrically connectable to a power source and to the battery; and
    protective structure connected to and extending from the outer surface of the housing, the protective structure extending from the outer surface beyond the battery.
  2. 2. The battery charger as set forth in claim 1, further comprising a plurality of bumpers supported on the outer surface of the housing, the bumpers absorbing impacts to the housing.
  3. 3. The battery charger as set forth in claim 1, wherein the protective structure includes a base connected to the housing for supporting the battery charger on a surface, the base extending beyond the outer surface of the housing and beyond the battery.
  4. 4. The battery charger as set forth in claim 3, wherein the base is blow molded from an impact-resistant plastic material.
  5. 5. The battery charger as set forth in claim 3, wherein the battery is supported on the outer surface of the housing, wherein the battery has a frontal battery surface and a lower battery surface, wherein the base is positioned below the lower battery surface when the battery is supported on the outer surface of the housing, and wherein the base extends beyond the frontal battery surface.
  6. 6. The battery charger as set forth in claim 3, wherein the protective structure includes a bar connected to the housing, the bar extending from the outer surface of the housing beyond the battery.
  7. 7. The battery charger as set forth in claim 1, wherein the protective structure includes a bar connected to the housing, the bar extending from the outer surface of the housing beyond the battery.
  8. 8. The battery charger as set forth in claim 7, wherein the battery is supported on the outer surface of the housing, wherein the battery has a frontal battery surface and a lower battery surface, wherein the bar extends beyond the frontal battery surface and the top battery surface when the battery is supported on the outer surface of the housing.
  9. 9. The battery charger as set forth in claim 7, wherein the battery is supported on the outer surface of the housing, wherein the battery has a first side surface, a second side surface and a top battery surface, wherein the bar includes an upper bar portion, a first lower bar portion, and a second lower bar portion, wherein the first lower bar portion and the second lower bar portion prevent impacts to the first and second side surfaces of the battery, and wherein the upper bar portion prevents impacts to the top battery surface.
  10. 10. The battery charger as set forth in claim 7, wherein the bar includes a handle grip for carrying the battery charger.
  11. 11. The battery charger as set forth in claim 7, further comprising a cushion connecting the housing with the bar, the cushion absorbing impacts to the bar.
  12. 12. The battery charger as set forth in claim 7, further comprising a base connected to the housing for supporting the battery charger on a surface, wherein the bar is connected to the base and the housing.
  13. 13. A battery charger comprising:
    a housing having an outer surface, a battery being supportable on the outer surface;
    a charging circuit supported by the housing and electrically connectable to a power source and to the battery;
    a base connected to the housing for supporting the battery charger on a surface, the base extending beyond the outer surface of the housing and beyond the battery; and
    a bar connected to the housing, the bar extending beyond the outer surface of the housing and beyond the battery.
  14. 14. The battery charger as set forth in claim 13 further comprising a plurality of bumpers supported on the outer surface of the housing, the bumpers absorbing impacts to the housing.
  15. 15. The battery charger as set forth in claim 13, wherein the base is blow molded from an impact-resistant plastic material.
  16. 16. The battery charger as set forth in claim 13, wherein the battery is supported on the outer surface of the housing, wherein the battery has a frontal battery surface and a lower battery surface, wherein the base is positioned below the lower battery surface when the battery is supported on the outer surface of the housing, and wherein the base extends beyond the frontal battery surface.
  17. 17. The battery charger as set forth in claim 13, wherein the battery is supported on the outer surface of the housing, wherein the battery has a frontal battery surface and a lower battery surface, wherein the bar extends beyond the frontal battery surface and the top battery surface when the battery is supported on the outer surface of the housing.
  18. 18. The battery charger as set forth in claim 13, wherein the battery is supported on the outer surface of the housing, wherein the battery has a first side surface, a second side surface and a top battery surface, wherein the bar includes an upper bar portion, a first lower bar portion, and a second lower bar portion, wherein the first lower bar portion and the second lower bar portion prevent impacts to the first and second side surfaces of the battery, and wherein the upper bar portion prevents impacts to the top battery surface.
  19. 19. The battery charger as set forth in claim 13, wherein the bar includes a handle grip for carrying the battery charger.
  20. 20. The battery charger as set forth in claim 13, further comprising a cushion connecting the housing with the bar, the cushion absorbing impacts to the bar.
  21. 21. The battery charger as set forth in claim 13, wherein the bar is connected to the base and the housing.
US11969128 2001-11-09 2008-01-03 Battery charger Abandoned US20080100261A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US34443101 true 2001-11-09 2001-11-09
US29160301 USD487059S1 (en) 2002-05-07 2002-05-07 Battery charger
US37906802 true 2002-05-09 2002-05-09
US10289621 US7332889B2 (en) 2001-11-09 2002-11-07 Battery charger
US11969128 US20080100261A1 (en) 2001-11-09 2008-01-03 Battery charger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11969128 US20080100261A1 (en) 2001-11-09 2008-01-03 Battery charger

Publications (1)

Publication Number Publication Date
US20080100261A1 true true US20080100261A1 (en) 2008-05-01

Family

ID=27403911

Family Applications (2)

Application Number Title Priority Date Filing Date
US10289621 Active 2023-08-13 US7332889B2 (en) 2001-11-09 2002-11-07 Battery charger
US11969128 Abandoned US20080100261A1 (en) 2001-11-09 2008-01-03 Battery charger

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US10289621 Active 2023-08-13 US7332889B2 (en) 2001-11-09 2002-11-07 Battery charger

Country Status (1)

Country Link
US (2) US7332889B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100026240A1 (en) * 2008-07-30 2010-02-04 3M Innovative Properties Company Lithium ion battery pack charging system and device including the same
US20120074893A1 (en) * 2009-12-22 2012-03-29 G2 Llc Battery charging and management systems and related methods
USD741795S1 (en) 2013-10-25 2015-10-27 Milwaukee Electric Tool Corporation Radio charger
US9781496B2 (en) 2012-10-25 2017-10-03 Milwaukee Electric Tool Corporation Worksite audio device with wireless interface

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6782618B2 (en) * 2001-10-26 2004-08-31 Glenn J. Luzzi Adapter mandrel used in conjunction with premolded high voltage connectors and connector components
US7332889B2 (en) * 2001-11-09 2008-02-19 Milwaukee Electric Tool Corporation Battery charger
US7609027B2 (en) * 2001-11-09 2009-10-27 Milwaukee Electric Tool Corporation Electrical component, audio component, or electrical combination having a selectively connectable battery charger
US20060113956A1 (en) * 2003-05-07 2006-06-01 Bublitz Scott D Battery charger and assembly
US20050024021A1 (en) * 2003-05-07 2005-02-03 Milwaukee Electric Tool Corporation Battery charger and assembly
DE10327005B4 (en) * 2003-06-12 2007-01-18 Ernst U. Willy Niegeloh Gmbh & Co. Kg Hornhauthobel
US7712182B2 (en) * 2003-07-25 2010-05-11 Milwaukee Electric Tool Corporation Air flow-producing device, such as a vacuum cleaner or a blower
US20050275378A1 (en) * 2004-06-14 2005-12-15 Serafino Canino Apparatus and method for illuminated battery charging device
EP1922797A1 (en) * 2005-09-09 2008-05-21 Linak A/S Actuator with electrical equipment enclosed in a seperate enclosure made of a fire resistant
DE102005045656A1 (en) * 2005-09-13 2007-03-15 Alfred Kärcher Gmbh & Co. Kg rechargeable battery
US7392592B2 (en) * 2005-10-07 2008-07-01 Milwaukee Electric Tool Corporation Ruggedized laser level
US7696721B2 (en) * 2005-11-08 2010-04-13 Emerson Electric Co. Switching method and apparatus for AC/DC powered corded/cordless appliance and related apparatus
WO2008010801A3 (en) * 2006-07-18 2009-04-30 Gerald Pierce Electrical energy source
JP4905852B2 (en) * 2006-09-07 2012-03-28 日立工機株式会社 Charger
GB0624942D0 (en) * 2006-12-14 2007-01-24 Media Instr Sa Audience measurement apparatus, system and method for producing audience information of a media presentation
CN101237074B (en) * 2007-01-11 2010-07-21 车王电子股份有限公司 Power tools battery
US8450970B1 (en) * 2007-05-14 2013-05-28 Micro Power Electronics, Inc. Small footprint portable battery charging station
JP5092648B2 (en) * 2007-09-25 2012-12-05 日立工機株式会社 Charging device
EP2110921B1 (en) 2008-04-14 2013-06-19 Stanley Black & Decker, Inc. Battery management system for a cordless tool
US8080972B2 (en) * 2008-06-02 2011-12-20 Goal Zero Llc System and method for storing and releasing energy
US8434894B2 (en) * 2009-11-16 2013-05-07 Goal Zero Llc Lighting apparatus; components thereof and assemblies incorporating the same
US20110162690A1 (en) * 2010-01-06 2011-07-07 Goal Zero Llc Transportable solar panel and support system
US8680809B2 (en) * 2010-06-18 2014-03-25 Nokia Corporation Battery charger
DE102010043585A1 (en) * 2010-11-08 2012-05-10 Hilti Aktiengesellschaft Method and charger for charging at least two accumulators
DE102010043582A1 (en) * 2010-11-08 2012-05-10 Hilti Aktiengesellschaft Mobile electric device with charge level indicator and battery for this
CN102684242A (en) * 2011-03-18 2012-09-19 鸿富锦精密工业(深圳)有限公司 Recharge stand
CN103959591B (en) 2011-11-29 2016-06-15 胡斯华纳有限公司 Charging means
GB201202239D0 (en) * 2012-02-09 2012-03-28 Airbus Operations Ltd Battery case
CN103542661A (en) 2012-07-11 2014-01-29 密尔沃基电动工具公司 Cooler
US9693470B2 (en) * 2013-06-14 2017-06-27 Hitachi Koki Co., Ltd. Electric device with surrounding protective frame
DE102013218534A1 (en) * 2013-09-16 2015-03-19 Robert Bosch Gmbh Battery charger
US20150171632A1 (en) * 2013-12-12 2015-06-18 Milwaukee Electric Tool Corporation Portable power supply and battery charger
JP6193150B2 (en) * 2014-02-26 2017-09-06 株式会社マキタ Charger
US9893384B2 (en) 2014-05-18 2018-02-13 Black & Decker Inc. Transport system for convertible battery pack
CN107078533A (en) 2014-05-18 2017-08-18 百得有限公司 Power tools System
KR20160024415A (en) * 2014-08-25 2016-03-07 삼성전자주식회사 Cradle for electronic device
EP3254016A1 (en) * 2015-02-04 2017-12-13 Milwaukee Electric Tool Corporation Light
US9668427B2 (en) 2015-03-25 2017-06-06 Black & Decker Inc. Battery-powered blower

Citations (76)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6362594B1 (en) *
US437409A (en) * 1890-09-30 Hoop-driving machine
US2266686A (en) * 1939-03-20 1941-12-16 Fern V Emanuel Battery construction
US3579075A (en) * 1968-08-14 1971-05-18 Gen Electric Compact battery charger for rechargeable batteries of various physical sizes and electrical capabilities
US4009429A (en) * 1975-12-31 1977-02-22 General Electric Company Charger with multiple attachable cellholder modules
US4211968A (en) * 1978-02-16 1980-07-08 General Electric Company Battery charger adapter
US4229686A (en) * 1978-02-13 1980-10-21 General Electric Company Battery charger adapter system
US4288733A (en) * 1979-10-17 1981-09-08 Black & Decker Inc. Battery charger system and method adapted for use in a sterilized environment
US4315364A (en) * 1978-08-03 1982-02-16 General Electric Company Method for fabricating a rechargeable electrical cell pack having over-current protection
US4612491A (en) * 1984-04-10 1986-09-16 Solid State Chargers Research & Development Limited Partnership Charger for batteries
US4629962A (en) * 1984-06-26 1986-12-16 Toko, Inc. Battery charging device
US4639655A (en) * 1984-04-19 1987-01-27 Westhaver Lawrence A Method and apparatus for battery charging
US4641076A (en) * 1985-01-23 1987-02-03 Hall Surgical-Division Of Zimmer, Inc. Method and apparatus for sterilizing and charging batteries
US4641077A (en) * 1985-01-23 1987-02-03 Hall Surgical-Divison Of Zimmer, Inc. Method and apparatus for providing sterile charged batteries
US4669728A (en) * 1985-11-18 1987-06-02 Carden Patrick M Electronic dice game
US4997731A (en) * 1988-02-24 1991-03-05 Sanyo Electric Co., Ltd. Packed battery and method of making the same
US5028859A (en) * 1989-06-05 1991-07-02 Motorola, Inc. Multiple battery, multiple rate battery charger
US5039929A (en) * 1988-05-16 1991-08-13 Aglo S.A. Automatic charger capable of charging several batteries
US5144217A (en) * 1989-03-03 1992-09-01 Black & Decker Inc. Cordless tool battery housing and charging system
US5191276A (en) * 1991-07-10 1993-03-02 Federal Express Corporation Versatile battery/charger module and system
US5192904A (en) * 1991-11-18 1993-03-09 Leiserson Steven B Rechargeable battery conversion kit
US5206576A (en) * 1989-11-22 1993-04-27 Motorola, Inc. Battery charger
US5280229A (en) * 1990-11-15 1994-01-18 Bsg-Schalttechnik Gmbh & Co. Kg Charging device for rechargeable batteries
US5287013A (en) * 1992-02-03 1994-02-15 Motorola, Inc. Battery compartment safety interlock
US5366827A (en) * 1992-06-10 1994-11-22 Digital Equipment Corporation Modular housing for batteries and battery charger
US5391972A (en) * 1988-03-11 1995-02-21 Gardner; Billy J. Cordless tool battery housing and charging system
US5394073A (en) * 1991-03-29 1995-02-28 Nec Corporation Charging device
US5457376A (en) * 1993-04-19 1995-10-10 Motorola, Inc. Integrated battery contact and retentive protrusion
US5486749A (en) * 1993-06-21 1996-01-23 Ast Research, Inc. Multiple battery charger with a power source control
US5523666A (en) * 1993-12-24 1996-06-04 Daimler-Benz Ag Battery-charging device for an electric vehicle
US5525888A (en) * 1993-05-14 1996-06-11 Sanyo Electric Co., Ltd. Battery charger, battery case, and electronic equipment
US5539297A (en) * 1992-05-15 1996-07-23 Robert Bosch Gmbh Charging device for charging a plurality of batteries based on parameter priority
US5560077A (en) * 1994-11-25 1996-10-01 Crotchett; Diane L. Vacuum dustpan apparatus
US5585783A (en) * 1994-06-28 1996-12-17 Hall; Roger E. Marker light utilizing light emitting diodes disposed on a flexible circuit board
US5621301A (en) * 1994-12-12 1997-04-15 Technoggin, Inc. Connecting multiple batteries to battery powered devices
US5640078A (en) * 1994-01-26 1997-06-17 Physio-Control Corporation Method and apparatus for automatically switching and charging multiple batteries
US5656914A (en) * 1995-10-31 1997-08-12 Motorola, Inc. Battery charger having pocket with multiple sets of charging contacts
US5664015A (en) * 1995-06-15 1997-09-02 Jing Mei Industrial Holdings, Inc. Shower speaker telephone
US5684384A (en) * 1995-10-31 1997-11-04 Motorola, Inc. Apparatus and method for discharging and charging a multiple battery arrangement
US5691618A (en) * 1992-11-16 1997-11-25 Yupiteru Industries Co., Ltd. Battery pack charging device
US5717309A (en) * 1995-10-30 1998-02-10 Samsung Electronics Co. Dual battery charging device
US5727372A (en) * 1996-05-30 1998-03-17 The Toro Company On-board charging system for electric lawn mower
US5734253A (en) * 1996-07-26 1998-03-31 Telxon Corporation Multiple station charging apparatus with stored charging algorithms
US5747964A (en) * 1994-02-22 1998-05-05 Packard Bell Nec Rechargeable battery and charging system
US5757163A (en) * 1995-09-29 1998-05-26 Black & Decker Inc. Battery Charger and method for simultaneously charging multiple batteries from a single power supply
US5780991A (en) * 1996-07-26 1998-07-14 Telxon Corporation Multiple station charging apparatus with single charging power supply for parallel charging
US5856038A (en) * 1995-08-12 1999-01-05 Black & Decker Inc. Retention latch
US5910380A (en) * 1998-03-27 1999-06-08 Motorola, Inc. Contact retention system
US5939858A (en) * 1998-09-10 1999-08-17 Dodd; Michael Battery charger box
US5959434A (en) * 1997-10-16 1999-09-28 Advanced Mobile Solutions, Inc. Mechanical charging selection apparatus
US6049192A (en) * 1999-03-18 2000-04-11 Motorola, Inc. Battery charger having moving door housing for a battery
US6057608A (en) * 1998-08-13 2000-05-02 Black & Decker Inc. Cordless power tool system
US6066938A (en) * 1998-03-18 2000-05-23 Makita Corporation Charging system including a charger and an electric power tool operating on an internal battery unit
US6091611A (en) * 1994-04-26 2000-07-18 Comarco Wireless Technologies, Inc. Connectors adapted for controlling a small form factor power supply
US6104292A (en) * 1998-03-04 2000-08-15 Rombom; Herman Baby bottle attachment with sound monitor/transmitter and recordable/pre-recorded sound playback
US6124699A (en) * 1998-09-11 2000-09-26 Matsushita Electric Industrial, Co., Ltd. Battery charger device
US6127802A (en) * 1999-11-19 2000-10-03 Motorola, Inc. Charger with battery retention door
US6204632B1 (en) * 1999-09-08 2001-03-20 Selfcharge Apparatus for charging multiple batteries
US6218807B1 (en) * 1997-11-25 2001-04-17 Matsushita Electric Works, Ltd. Charger
US6246211B1 (en) * 2000-01-19 2001-06-12 Hewlett-Packard Company Smart charger
US20010003416A1 (en) * 1999-12-14 2001-06-14 Katsuyuki Kajiura Vehicle battery charger with cooling device
US6308059B1 (en) * 1997-12-12 2001-10-23 Joseph Domes Ruggedized tradesworkers radio
US6346793B1 (en) * 1999-10-26 2002-02-12 Makita Corporation Battery charger with a terminal protector
US20020077073A1 (en) * 1999-03-04 2002-06-20 Roger Q. Smith Heavy-duty audio equipment
US20020117996A1 (en) * 2001-02-27 2002-08-29 Chin-Hung Cheng Battery charger for a cellular phone
US6475680B1 (en) * 1998-03-18 2002-11-05 Hitachi, Ltd. Lithium secondary battery, its electrolyte, and electric apparatus using the same
US6509715B1 (en) * 2001-05-07 2003-01-21 D.J. Larue Enterprises, Inc. Rechargeable battery system for hand-held devices
US6512177B2 (en) * 2000-06-19 2003-01-28 Sumitomo Wiring Systems, Ltd. Protection cover for a battery terminal and a battery terminal
US20030031979A1 (en) * 2001-07-12 2003-02-13 Water Pik, Inc. Dual motor oral hygiene device
US20030068545A1 (en) * 2001-10-05 2003-04-10 Wu Donald P.H. Battery housing for medical scooter
USD474176S1 (en) * 2001-10-02 2003-05-06 Emerson Radio Corp. Protective cage portion
US20030090234A1 (en) * 2001-11-09 2003-05-15 Glasgow Kevin L. Battery charger
US20030197485A1 (en) * 2002-04-22 2003-10-23 Michael Miller Battery adapter
US6730004B2 (en) * 1998-08-19 2004-05-04 Douglas Spriggs Selsam Blow-moldable water-filled freeweights
US20050024021A1 (en) * 2003-05-07 2005-02-03 Milwaukee Electric Tool Corporation Battery charger and assembly
US20050285560A1 (en) * 2004-06-29 2005-12-29 Glasgow Kevin L Battery charger with secondary outlet

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4237409A (en) 1978-05-04 1980-12-02 General Electric Company Multiple-battery battery charger
US4225814A (en) 1978-08-11 1980-09-30 Black & Decker, Inc. Cordless vacuum cleaner storing and recharging system
CA2408978C (en) 1992-05-29 2004-12-28 Sony Corporation Battery cartridge having hollow electrodes and a recess for detecting misuse and/or recessed terminals
DE69928579D1 (en) 1998-09-15 2005-12-29 Black & Decker Inc Rechargeable battery powered portable forced-resistant audio device

Patent Citations (87)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US437409A (en) * 1890-09-30 Hoop-driving machine
US6362594B1 (en) *
US2266686A (en) * 1939-03-20 1941-12-16 Fern V Emanuel Battery construction
US3579075A (en) * 1968-08-14 1971-05-18 Gen Electric Compact battery charger for rechargeable batteries of various physical sizes and electrical capabilities
US4009429A (en) * 1975-12-31 1977-02-22 General Electric Company Charger with multiple attachable cellholder modules
US4229686A (en) * 1978-02-13 1980-10-21 General Electric Company Battery charger adapter system
US4211968A (en) * 1978-02-16 1980-07-08 General Electric Company Battery charger adapter
US4315364A (en) * 1978-08-03 1982-02-16 General Electric Company Method for fabricating a rechargeable electrical cell pack having over-current protection
US4288733A (en) * 1979-10-17 1981-09-08 Black & Decker Inc. Battery charger system and method adapted for use in a sterilized environment
US4612491A (en) * 1984-04-10 1986-09-16 Solid State Chargers Research & Development Limited Partnership Charger for batteries
US4639655A (en) * 1984-04-19 1987-01-27 Westhaver Lawrence A Method and apparatus for battery charging
US4629962A (en) * 1984-06-26 1986-12-16 Toko, Inc. Battery charging device
US4641076A (en) * 1985-01-23 1987-02-03 Hall Surgical-Division Of Zimmer, Inc. Method and apparatus for sterilizing and charging batteries
US4641077A (en) * 1985-01-23 1987-02-03 Hall Surgical-Divison Of Zimmer, Inc. Method and apparatus for providing sterile charged batteries
US4669728A (en) * 1985-11-18 1987-06-02 Carden Patrick M Electronic dice game
US4997731A (en) * 1988-02-24 1991-03-05 Sanyo Electric Co., Ltd. Packed battery and method of making the same
US5391972A (en) * 1988-03-11 1995-02-21 Gardner; Billy J. Cordless tool battery housing and charging system
US5039929A (en) * 1988-05-16 1991-08-13 Aglo S.A. Automatic charger capable of charging several batteries
US5144217A (en) * 1989-03-03 1992-09-01 Black & Decker Inc. Cordless tool battery housing and charging system
US5028859A (en) * 1989-06-05 1991-07-02 Motorola, Inc. Multiple battery, multiple rate battery charger
US5206576A (en) * 1989-11-22 1993-04-27 Motorola, Inc. Battery charger
US5280229A (en) * 1990-11-15 1994-01-18 Bsg-Schalttechnik Gmbh & Co. Kg Charging device for rechargeable batteries
US5394073A (en) * 1991-03-29 1995-02-28 Nec Corporation Charging device
US5191276A (en) * 1991-07-10 1993-03-02 Federal Express Corporation Versatile battery/charger module and system
US5192904A (en) * 1991-11-18 1993-03-09 Leiserson Steven B Rechargeable battery conversion kit
US5287013A (en) * 1992-02-03 1994-02-15 Motorola, Inc. Battery compartment safety interlock
US5539297A (en) * 1992-05-15 1996-07-23 Robert Bosch Gmbh Charging device for charging a plurality of batteries based on parameter priority
US5366827A (en) * 1992-06-10 1994-11-22 Digital Equipment Corporation Modular housing for batteries and battery charger
US5691618A (en) * 1992-11-16 1997-11-25 Yupiteru Industries Co., Ltd. Battery pack charging device
USD348461S (en) * 1992-12-29 1994-07-05 Pollyflame International B.V. Radio
US5457376A (en) * 1993-04-19 1995-10-10 Motorola, Inc. Integrated battery contact and retentive protrusion
US5525888A (en) * 1993-05-14 1996-06-11 Sanyo Electric Co., Ltd. Battery charger, battery case, and electronic equipment
US5486749A (en) * 1993-06-21 1996-01-23 Ast Research, Inc. Multiple battery charger with a power source control
US5523666A (en) * 1993-12-24 1996-06-04 Daimler-Benz Ag Battery-charging device for an electric vehicle
US5640078A (en) * 1994-01-26 1997-06-17 Physio-Control Corporation Method and apparatus for automatically switching and charging multiple batteries
US5821733A (en) * 1994-02-22 1998-10-13 Packard Bell Nec Multiple cell and serially connected rechargeable batteries and charging system
US5747964A (en) * 1994-02-22 1998-05-05 Packard Bell Nec Rechargeable battery and charging system
US6091611A (en) * 1994-04-26 2000-07-18 Comarco Wireless Technologies, Inc. Connectors adapted for controlling a small form factor power supply
US5585783A (en) * 1994-06-28 1996-12-17 Hall; Roger E. Marker light utilizing light emitting diodes disposed on a flexible circuit board
US5560077A (en) * 1994-11-25 1996-10-01 Crotchett; Diane L. Vacuum dustpan apparatus
US5621301A (en) * 1994-12-12 1997-04-15 Technoggin, Inc. Connecting multiple batteries to battery powered devices
US5664015A (en) * 1995-06-15 1997-09-02 Jing Mei Industrial Holdings, Inc. Shower speaker telephone
US5856038A (en) * 1995-08-12 1999-01-05 Black & Decker Inc. Retention latch
USD412487S (en) * 1995-09-20 1999-08-03 Motorola, Inc. Charger
US5757163A (en) * 1995-09-29 1998-05-26 Black & Decker Inc. Battery Charger and method for simultaneously charging multiple batteries from a single power supply
US5717309A (en) * 1995-10-30 1998-02-10 Samsung Electronics Co. Dual battery charging device
US5656914A (en) * 1995-10-31 1997-08-12 Motorola, Inc. Battery charger having pocket with multiple sets of charging contacts
US5684384A (en) * 1995-10-31 1997-11-04 Motorola, Inc. Apparatus and method for discharging and charging a multiple battery arrangement
US5727372A (en) * 1996-05-30 1998-03-17 The Toro Company On-board charging system for electric lawn mower
US5780991A (en) * 1996-07-26 1998-07-14 Telxon Corporation Multiple station charging apparatus with single charging power supply for parallel charging
US5734253A (en) * 1996-07-26 1998-03-31 Telxon Corporation Multiple station charging apparatus with stored charging algorithms
US5959434A (en) * 1997-10-16 1999-09-28 Advanced Mobile Solutions, Inc. Mechanical charging selection apparatus
US6218807B1 (en) * 1997-11-25 2001-04-17 Matsushita Electric Works, Ltd. Charger
US6456837B1 (en) * 1997-12-12 2002-09-24 Joseph Domes Ruggedized tradesworkers radio
US6308059B1 (en) * 1997-12-12 2001-10-23 Joseph Domes Ruggedized tradesworkers radio
US6104292A (en) * 1998-03-04 2000-08-15 Rombom; Herman Baby bottle attachment with sound monitor/transmitter and recordable/pre-recorded sound playback
US6066938A (en) * 1998-03-18 2000-05-23 Makita Corporation Charging system including a charger and an electric power tool operating on an internal battery unit
US6475680B1 (en) * 1998-03-18 2002-11-05 Hitachi, Ltd. Lithium secondary battery, its electrolyte, and electric apparatus using the same
US5910380A (en) * 1998-03-27 1999-06-08 Motorola, Inc. Contact retention system
US6057608A (en) * 1998-08-13 2000-05-02 Black & Decker Inc. Cordless power tool system
US6730004B2 (en) * 1998-08-19 2004-05-04 Douglas Spriggs Selsam Blow-moldable water-filled freeweights
US5939858A (en) * 1998-09-10 1999-08-17 Dodd; Michael Battery charger box
US6124699A (en) * 1998-09-11 2000-09-26 Matsushita Electric Industrial, Co., Ltd. Battery charger device
US6427070B1 (en) * 1999-03-04 2002-07-30 Black & Decker Inc. Heavy-duty audio equipment
US20020077073A1 (en) * 1999-03-04 2002-06-20 Roger Q. Smith Heavy-duty audio equipment
US6049192A (en) * 1999-03-18 2000-04-11 Motorola, Inc. Battery charger having moving door housing for a battery
USD424515S (en) * 1999-05-15 2000-05-09 Single unit battery charger for multiple batteries with plug insert
US6204632B1 (en) * 1999-09-08 2001-03-20 Selfcharge Apparatus for charging multiple batteries
USD429211S (en) * 1999-09-14 2000-08-08 Ryobi North America, Inc. Battery charger
US6346793B1 (en) * 1999-10-26 2002-02-12 Makita Corporation Battery charger with a terminal protector
US6127802A (en) * 1999-11-19 2000-10-03 Motorola, Inc. Charger with battery retention door
US6362594B2 (en) * 1999-12-14 2002-03-26 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Vehicle battery charger having cooling blower providing improved cooling efficiency
US20010003416A1 (en) * 1999-12-14 2001-06-14 Katsuyuki Kajiura Vehicle battery charger with cooling device
US6246211B1 (en) * 2000-01-19 2001-06-12 Hewlett-Packard Company Smart charger
US6512177B2 (en) * 2000-06-19 2003-01-28 Sumitomo Wiring Systems, Ltd. Protection cover for a battery terminal and a battery terminal
US20020117996A1 (en) * 2001-02-27 2002-08-29 Chin-Hung Cheng Battery charger for a cellular phone
US6509715B1 (en) * 2001-05-07 2003-01-21 D.J. Larue Enterprises, Inc. Rechargeable battery system for hand-held devices
US20030031979A1 (en) * 2001-07-12 2003-02-13 Water Pik, Inc. Dual motor oral hygiene device
USD474176S1 (en) * 2001-10-02 2003-05-06 Emerson Radio Corp. Protective cage portion
USD474177S1 (en) * 2001-10-02 2003-05-06 Emerson Radio Corp. Protective cage
USD474175S1 (en) * 2001-10-02 2003-05-06 Emerson Radio Corp. Protective cage and radio combination
USD479223S1 (en) * 2001-10-02 2003-09-02 Emerson Radio Corp. Protective cage and radio combination
US20030068545A1 (en) * 2001-10-05 2003-04-10 Wu Donald P.H. Battery housing for medical scooter
US20030090234A1 (en) * 2001-11-09 2003-05-15 Glasgow Kevin L. Battery charger
US20030197485A1 (en) * 2002-04-22 2003-10-23 Michael Miller Battery adapter
US20050024021A1 (en) * 2003-05-07 2005-02-03 Milwaukee Electric Tool Corporation Battery charger and assembly
US20050285560A1 (en) * 2004-06-29 2005-12-29 Glasgow Kevin L Battery charger with secondary outlet

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100026240A1 (en) * 2008-07-30 2010-02-04 3M Innovative Properties Company Lithium ion battery pack charging system and device including the same
US20120074893A1 (en) * 2009-12-22 2012-03-29 G2 Llc Battery charging and management systems and related methods
US9781496B2 (en) 2012-10-25 2017-10-03 Milwaukee Electric Tool Corporation Worksite audio device with wireless interface
USD741795S1 (en) 2013-10-25 2015-10-27 Milwaukee Electric Tool Corporation Radio charger

Also Published As

Publication number Publication date Type
US20030090234A1 (en) 2003-05-15 application
US7332889B2 (en) 2008-02-19 grant

Similar Documents

Publication Publication Date Title
US5652499A (en) Power supply apparatus to provide power to electrical equipment from a plurality of battery packs and its method of power supply
US5912546A (en) Battery charger for battery packs
US6337436B1 (en) Solar module for attachment to motor vehicles and a process for its manufacture
US5155659A (en) Hand-held data collection terminal with battery compartment sealing lid and lid-tethering hand strap
US6186641B1 (en) Flashlight and charging system
US7038131B1 (en) Telescoping box adapter
US5592064A (en) Battery charging apparatus, power supply, and attachment for connecting different types of battery packs to a battery charger
US20050088141A1 (en) Portable charger for mobile phone
US6218807B1 (en) Charger
US6624616B1 (en) Portable battery recharge station
US5895729A (en) Battery latch assembly for two-way radio
US5898932A (en) Portable cellular phone with integral solar panel
US7085112B2 (en) High-power ultracapacitor energy storage pack and method of use
US5665485A (en) Splashproof construction for portable type electronic device
US5217395A (en) Low-voltage, high current capacity connector assembly and mobile power tool and appliance operating system
US4997033A (en) Heat exchanger for cooling the cooling water and the charge air of an internal combustion engine
US20090126964A1 (en) Mid-handle drill construction and assembly process
US20050058890A1 (en) Removable battery pack for a portable electric power tool
US20100320969A1 (en) Battery pack
US5148094A (en) Charger with universal battery pack receptacle
US6357534B1 (en) Battery pack latching assembly for fastener driving tool
US5449567A (en) Rechargeable battery
US20070216226A1 (en) Power supply device for a vehicle
EP1309019A2 (en) Battery packs suitable for use with battery powered appliances
US6729414B2 (en) Cordless drill with metal housing

Legal Events

Date Code Title Description
AS Assignment

Owner name: MILWAUKEE ELECTRIC TOOL CORPORATION, WISCONSIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GLASGOW, KEVIN L.;ROZWADOWSKI, DAVID J.;ZEILER, JEFFREY M.;AND OTHERS;REEL/FRAME:020389/0871;SIGNING DATES FROM 20021103 TO 20021105