This application relates to a battery pack charging system and a method for manufacturing a battery pack charging system. In one implementation, the battery pack charging system includes a jobsite box and a plurality of battery pack chargers housed inside the jobsite box.
The instant application describes an exemplary battery pack charging system for charging a plurality of battery packs.
Large commercial jobsites can have thousands of power tools. Adoption of cordless tools is hampered by the inability to charge battery packs in a large enough scale and at a fast enough rate to keep up with the workforce. As such, many tools remain corded despite the desire of jobsite managers to transition to cordless.
Another example embodiment of the present invention includes a commercial grade jobsite charging system. The charging system includes an enclosure. The enclosure defines an internal space/cavity/volume. The enclosure may include a top wall, a bottom wall and four side walls coupling the top and bottom walls forming a generally rectangular box. The walls define the internal space. The enclosure is weather resistant.
The charging system includes a plurality of multi-port chargers. For example, the charging system may include eight (8) multi-port chargers. Each charger my include, for example, four charging ports. The system may include a power input that is configured to receive power from an outside power source, for example a mains line or a generator. The system's input power may be at 240V and 50 A. Each charger may operate at a relatively low power level compared to the system's input power. For example, the charger power level may be at 120V and 15 A, single phase. A first set of chargers, for example four chargers, are attached to an internal surface of a first side wall. A second set of chargers, for example four chargers, are attached to an internal surface of a second side wall, the second side wall being opposed to the first side wall. Each charger may be in communication (wired or wirelessly) with a system level control module. In an alternate embodiment, each charger may be self-governing without the use of a system level control module.
The charging system may also include a power distribution unit. The power distribution unit may be mechanically/physically coupled to an internal surface of a third side wall, the third side wall between and generally perpendicular to the first and second side walls and electrically coupled to each of the plurality of chargers (either hard wired or by a plug/socket configuration).
The charging system may also include a control module. The control module may include a control circuit including processing circuitry, control circuitry, memory, communications circuitry, e.g., wired or wireless transceiver circuitry.
The charging system may include an AC power input port, a cord/plug set coupled to the AC power input port for receiving relatively high power (240V, 50 A, single phase) from a jobsite power supply.
The charging system may include a GFCI circuit breaker between the AC power input port and the power distribution unit. The power distribution unit may include a GFCI circuit breaker at its input and output ports/receptacles.
The charging system may include a fan mechanically coupled to an internal surface of a fourth side wall, the fourth side wall between and generally perpendicular to the first and second side walls and generally parallel to the third side wall. The fan may be electrically coupled to the power distribution unit. The fan may be in communication (wired or wirelessly) with the control module. The fan may be configured to move air into or out of the internal space. The fan may include an integrated temperature sensor and control module/circuit.
The charging system may include a heating element. The heating element may be electrically coupled to the power distribution unit. The heating element may be in communication (wired or wirelessly) with the control module. The heating element may include an integrated temperature sensor.
The charging system may include a display unit. The display unit may be mechanically coupled to an exterior surface of the enclosure. The display unit may be electrically coupled to the distribution unit. The display unit may be in communication (wired or wirelessly) with the control module.
The charging system may be configured to receive at least one battery pack in at least one of the plurality of charging ports and charged by the charger. The battery pack may be in communication (wired or wirelessly) with the chargers and/or the system control module.
The charging system may include a discrete temperature sensor. The discrete temperature sensor may be mechanically coupled to one of the side walls. The discrete temperature sensor may be in communication (wired or wirelessly) with the control module.
Another example embodiment of charging system may include an enclosure. The enclosure may be designed and configured to receive, via a temporary connection, relatively high input power, e.g., 480V, 3-phase, 60 A. The charging system may include a plurality of interior chargers of relatively lower power, e.g., 120V single phase, 15 A. The charging system may include a high power transformer to adapt the relatively high input power voltage to that of the lower power chargers. The charging system may simultaneously charge a plurality of battery packs, e.g., 32 battery packs.
The enclosure may be weather resistant. The enclosure may be liftable and transportable, for example, by a crane or a forklift.
The charging system may include an internet connection, e.g., WiFi or cellular, to BLE gateway for assessing BLE-capable inventory in the enclosure.
The enclosure may include a user accessible, internal or external facing power receptacles.
The charging system may include environmental controls to keep the temperature of the packs in an operating range that allows the packs to be charged.
The charging system may include pass thru connections for chaining multiple charging enclosures together.
Another example embodiment of the charging system may include an enclosure. The enclosure may be configured to receive, through a pluggable connection, a relatively high power signal, e.g., 240V, single phase, 50 A. The charging system may include a plurality of interior chargers of relatively lower power—e.g. 120V, single phase, 10 A. The charging system may include an input GFCI circuit breaker. The charging system may include a power distribution unit. The charging system may simultaneously charge a plurality of battery packs, e.g., 32 battery packs.
The enclosure may be weather resistant. The enclosure may be liftable and transportable, for example, by a crane or a forklift.
The charging system may include an internet connection, e.g., WiFi or cellular, to BLE gateway for assessing BLE-capable inventory in the enclosure.
The charging system may include environmental controls to keep the temperature of the packs in an operating range that allows the packs to be charged.
The enclosure may be securable thru an external padlock or some other type of locking mechanism.
Another example embodiment of the charging system may include an enclosure. The enclosure defines an interior (or internal) space (or volume). The enclosure contains and provides power for a plurality of battery pack chargers positioned (or housed or situated) in the interior space. The input power rating of the enclosure is greater than the input power rating of the interior chargers. The input power voltage of the enclosure is greater than the input power voltage of the interior chargers.
The interior chargers may be removable from the enclosure.
The charging system may include a BLE gateway to a long range connection, e.g., cellular, WiFi, Lora. The BLE gateway may be located within the space defined by the enclosure.
The charging system may regulate the temperature—by heating and cooling—of the interior space and hence the immediate external environment of the battery packs coupled to the battery pack chargers for maintaining the battery packs within a preferred operating range for optimal charging (4 C to 40 C). This is notably different from fan cooled chargers that blow air thru the battery, but do not regulate the surrounding environment.
The enclosure may include a plurality of circuit breakers for safely managing the current to the plurality of interior chargers.
The charging system may include an input connection suitable for temporary jobsite power connections; and a pass-thru connector of the same type (though opposite gender).
Another example embodiment of a charging system may include an enclosure. The charging system may communicate the state of charge of the battery packs on the individual, interior chargers to a charging system control module. The charging system may communicate the state of charge via a display on the enclosure, e.g., a screen, an LED indicator, via networked notification, e.g., text message, or to an endpoint enabled by an internet connection.
The enclosure may be of a similar rated power as the interior chargers. The charging system my include a power multiplexer switch transfer connection to sequentially connect the interior chargers to the enclosure power supply when the current draw of the interior chargers falls below a threshold.
The enclosure interior may be sized such that, in addition to the plurality of battery pack chargers and accompanying control equipment, a person can physically enter the interior, e.g., a Connex box, to access the interior chargers and battery packs.
The enclosure may include a fire suppression system.
Implementations of this aspect may include one or more of the following features.
Advantages may include one or more of the following.
These and other advantages and features will be apparent from the description and the drawings.
Referring to
The charging system may include a set of legs attached to the bottom wall of the enclosure. The legs rest on the ground or other supporting surface. The legs allow the enclosure to be raised off the ground or other supporting surface. The legs may include openings to allow the charging system to be lifted and relocated by, for example, a forklift or a crane.
The charging system may include an alternating current (AC) power input port. The power input port may be configured to maintain the sealing integrity of the enclosure. In other words, the power input port is a sealed port or recessed to protect against direct exposure to the exterior environmental conditions, such as temperature and moisture. The power input port may include an electromechanical connector for transmitting electricity into the enclosure. The connector may be a male or a female connector. The charging system may include a cord/plug set. The cord/plug set may be configured to transmit electricity from a power supply to the charging system. The cord/plug set may include a first connector that is configured to mate with the power input port connector. Alternatively, the cord/plug set may be hardwired to the AC power input port and to the power input port connector. The cord/plug set may include a second connector that is configured to connect to a high voltage power supply. For example, the second connector may be a male, prong connector for mating with a corresponding female socket. The female socket may be coupled to a high voltage power supply. The high voltage power supply may be, for example, 480V, 3-phase, 60 A or 240V, single phase, 50 A.
The enclosure may include a vent or louver to enable directed airflow out of the enclosure. The vent may be located in one of the side walls, for example, the fourth side wall. the vent may be configured and positioned to correspond to a fan housed in the interior space, as described in more detail below.
Referring
Each of example multi-port battery pack chargers includes four (4) ports or battery pack receptacles. Each of the ports of each of the pack chargers may receive a battery pack for charging (as will be described in more detail below). As illustrated in
The charging system may include a power distribution unit (sometimes referred to as a power distribution panel). The power distribution unit is designed and configured to distribute input power from an input port to output power to a plurality of output ports. The power distribution unit may configure and/or convert a high input power (current/voltage) to a lower output power (current/voltage). The power distribution unit may split the input power into multiple output power circuits. The power distribution unit may condition the input power in other manners, such as electrical transformation using an electrical transformer.
The AC input port may be electrically coupled to the power distribution unit. The power from the high voltage power supply is provided to the power distribution unit via the cord/plug set and the AC power input port. The AC power input port my include a GFCI circuit breaker.
The charging system may include a control module. The control module may include a plurality and variety of electrical and electronic components including but not limited to microprocessors, microcontrollers, memory circuits, sensors and switches. The various components are electrically coupled in various related circuits and circuitry. The control module and its components and circuitry may monitor and control the various components of the charging system. The control module may be housed inside the enclosure in the interior space. The control module may be incorporated into the power distribution unit or it may be discrete component.
The power distribution unit may be electrically coupled to the control module. The control module may monitor the status of the power distribution unit and control the operation of the power distribution unit. The power distribution unit may provide appropriate operating power (voltage/current) to the control module.
Each of the pack chargers A-H may be electrically coupled to the power distribution unit. The pack chargers may be removably coupled to the power distribution unit through a plug and socket connection or the pack chargers may be hard wired or fixedly wired to the power distribution unit. The power distribution unit provides the appropriate power (voltage/current) to the pack chargers. For example, the power distribution unit may convert 240V 50 A input power to 120V 15 A output power for input to the pack chargers.
Each of the pack chargers may include control circuitry and components to monitor and charge any and all of the battery packs received in a battery pack receptacle using the power received from the power distribution unit.
The charging system may include a fan. The fan may be electrically coupled to the power distribution unit and/or to the control module. The power distribution unit may provide appropriate operating power (voltage/current) to the fan. The fan may include an internal temperature sensor. The fan may turn on and off based on control settings and the internal temperature sensor. Alternatively, the fan may be powered and/or controlled by the control module. Alternatively, the charging system may include a discrete temperature sensor positioned in the interior space. The discrete temperature sensor may be electrically coupled to the control module. The control module may control the fan based on control settings and the discrete temperature sensor. The fan may move air from the interior space to outside the enclosure. The fan may move air from outside the enclosure to interior space.
The charging system may include a heating element. The heating element may be electrically coupled to the power distribution unit and to the control module. The power distribution unit may provide appropriate operating power (voltage/current) to the heating element. The heating element may include an internal temperature sensor. The heating element may turn on and off based on control settings and the internal temperature sensor.
Alternatively, the heating element may be controlled by the control module. Alternatively, the charging system may include a discrete temperature sensor positioned in the interior space. The discrete temperature sensor may be electrically coupled to the control module. The control module may control the heating element based on control settings and the discrete temperature sensor.
Referring
This example embodiment of the charging system may include a charger mounting fixture. The charger mounting fixture may be a prefabricated unit that may be installed into the interior space. The charger mounting fixture facilitates mounting the pack chargers and efficient positioning of the pack chargers within the interior space.
The charger mounting fixture may include a fixture base. When the charger mounting fixture is installed in the enclosure, the fixture base may be generally parallel to bottom wall and offset from the bottom wall a distance X1. The fixture base may be of a generally rectangular shape having a length L (less than the distance between the third and fourth walls) and a width W (less than the distance between the first and the second walls).
A base wall may extend from a first length edge of the fixture base in a first direction.
The first direction may be generally perpendicular to the fixture base. The base wall may have a length L and a height X2. A first shoulder wall may extend from a second length edge of the base wall in a second direction. The second direction may be generally perpendicular to the base wall and may be generally parallel to the fixture base. A first support wall may extend from a second length edge of the first shoulder wall in the first direction. The first support wall may have a length L and a height X3.
A second support wall may extend from a second length edge of the fixture base in the first direction. The second support wall may have a length L and a height X4. A second shoulder wall may extend from a second length edge of the second support wall in a direction generally opposite to the second direction. A third support wall may extend from a second length edge of the second should wall in the first direction. The third support wall may have a length L and a height X5.
When the charger mount fixture is installed in the interior space of the enclosure may positioned in the enclosure as illustrated in
When the charger mount fixture is installed in the enclosure, the charger mount fixture, the first, second, third, fourth and bottom side walls may form a fixture chamber or cavity. The first and second should walls may include cutouts or openings in the wall. These cutouts provide access to the fixture chamber. When then pack chargers are mounted to the support walls air outlet vents in the pack chargers may align with the cutouts. Additionally, the cutouts may be sized and configured to receive a power transfer cord from the pack charger into the fixture chamber.
The power distribution unit may be positioned in the fixture chamber in a space generally defined by the base wall, the bottom side wall, the front wall, the first shoulder wall, the third side wall and the fourth side wall. The fan may be positioned in the fixture chamber in a space generally defined by the base wall, the bottom side wall, the front wall, the first shoulder wall, the third side wall and the fourth side wall.
As illustrated in
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Wiring for the charging system may run through the fixture chamber. For example, the power cords connecting the pack chargers to the power distribution unit and/or the control module may run through the fixture chamber and the power wiring connecting the fan and the heater to the power distribution unit and/or the control module may run through the fixture chamber and the power cord connecting the AC power input port to the power distribution unit may run through the fixture chamber.
As noted above, when the pack chargers are mounted to the charger mounting fixture outlet vents of the pack charger may align with the corresponding cutout in the corresponding shoulder wall. The pack charger may also include air inlet vents and a fan for moving air from the pack charger inlet vent to the pack charger outlet vent. The fan may move air over various heat generating components of the pack charger or over the battery packs. The pack charger fan may move air from the interior space through the pack charger and into the fixture chamber. The charging system fan my move air from the fixture chamber to outside the enclosure through the enclosure vent/louver.
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Numerous modifications may be made to the exemplary implementations described above. These and other implementations are within the scope of this application.
This application claims priority under 35 U.S.C. § 119(e) to U.S. Provisional Patent Application No. 63/263,790, filed Nov. 9, 2021, titled “Battery Pack Charging System.”
Number | Date | Country | |
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63263790 | Nov 2021 | US |