FIELD OF INVENTION
The present invention relates to a system and method of multiple battery selection in a power backup system. More particularly, the present invention relates a power backup system with multiple battery selection compatible with any type of battery.
BACKGROUND AND PRIOR ART
Selector circuits are typically utilized in a power supply block for various electronic devices. Such selector circuits are generally designed to select between a DC power source, e.g., an AC/DC adapter, and a rechargeable battery. Such selector circuits are not designed to make selections of two or more types of batteries for operation. In addition, in various electronic devices like a laptop computer, such selector circuits are typically controlled via control signals communicated via a System Management Bus (SMBus) according to a specified protocol. Such selector circuits typically cannot independently ascertain, correct, and notify other components in the power supply block, and are not configured to accept control signals from an associated host power management unit.
Reference may be made to the following known arts:-
US patent no 7,489,110 and 7,009,364 relate to a selector circuit configured to select among a DC power source and a plurality of batteries for an electronic device. The selector circuit is responsive to an output signal from an associated power management unit. The selector circuit is further configured to permit parallel operation of two or more of the batteries. The selector circuit may further act to independently verify power conditions and override instructions from the PMU in certain instances to enhance power supply safety and battery life such as by preventing inter battery current flow from a higher potential battery to a lower potential battery coupled in parallel.
Publication no EP1575177 discloses the battery switching circuit for a portable communication device provided with a plurality of batteries in which the total amount of charged power of the batteries can be consumed completely. The battery switching circuit prevents a voltage from being applied from one battery to another battery.
US publication no 20090167091 describes the selector circuit configured to select among a DC power source and a plurality of batteries for an electronic device. The selector circuit includes a first comparator configured to compare a first input signal representative of a voltage level of the DC power source with a first threshold level and provide a first output signal representative of a difference between the first input signal and the first threshold level, and a selector output circuit.
US patent no 7,501,720 relates to a selector circuit configured to select among a DC power source and a plurality of batteries for an electronic device. The selector circuit includes a first comparator configured to compare a first input signal representative of a voltage level of the DC power source with a first threshold level and provide a first output signal representative of a difference between the first input signal and the first threshold level, and a selector output circuit. The selector output circuit is configured to provide selector output signals that control selection among the DC power source and the plurality of batteries. The selector output circuit providing said selector output signals to select the DC source and deselect the plurality of batteries if the first output signal is representative of the voltage level of said DC power source being greater than the first threshold level.
US publication no WO2008155209 relates to a switch with multiple battery terminals and a pair of connector clamps, wherein the battery terminals and the pair of connector clamps each have a positive pole and a negative pole provided with a switch for the selectable connection of the battery terminals to the connector clamps. The switch has
switch elements that connect at least two subgroups of battery terminals in a selectable manner in series or in parallel to at least one group, and said switch connects at least one group to the pair of connector clamps.
Publication no KR20060060519 discloses the charger for a secondary battery capable of charging any secondary battery with a charging rate of substantially 100% regardless of the type or version thereof comprises a voltage value increment device for incrementing a check voltage level at a specified pitch from a lowest voltage level lower than a rated full charge balance voltage level, a selector switch for switching the charging voltage to a specified charging application voltage level or the check voltage level, a first judging means for making a decision whether a current level detected by a current detecting section is lower than a criterion level or not; and a second judging means for making a decision whether the time required by the first judging means for making current affirmative decision after previous affirmative decision exceeds twice of the time required for making the previous affirmative decision after the preceding affirmative decision.
Reference may be made to an article by "Solar Taos Product Catalog, 2010" The article talks about high current switch designed for battery switching in boats but can be used in land-based units. It permits selection between one of two batteries or the connection of both batteries in parallel. The "off" position also acts as a battery disconnect.
Reference may be made to an article by "C.G. Edwards & Co. Inc, August 1, 2009" The article talks about Battery selector switches for use with two or more batteries and single or dual engine systems. They permit selection between batteries for starting or charging or operation of both batteries in parallel. They allow the addition of an extra battery for use with accessories. The "OFF" position also acts as an emergency disconnect in the event of an electrical problem.
Reference may be made to an article by "Rat Sport" The article talks about battery selector switch locking which permits selection between batteries for starting and charging or operation of both batteries in parallel.
Reference may be made to an article by "Nex Tag, Inc, 1999- 2010" The article talks about marine battery selector switch used with two or more batteries and single or dual engine systems. They permit selection between batteries for starting and charging or operation of both batteries in parallel.
Thus, a number of selector circuits are provided for selecting multiple type of batteries but none of the system describes the automatic method of selecting the charger as per the selected battery and charge it accordingly.
With all the above discussed restrictions or limitations, it is required to have a power backup system which provides an automatic charger selection as per the type of battery connected.
OBJECTS OF THE INVENTION
The principal object of the present invention is to provide a system and method of multiple battery selection in a power backup system.
Another object of the present invention is to provide a power backup system with multiple battery selection which is compatible with any type of battery.
Yet another object of the present invention is to provide a system and method so that N number of batteries can be connected to the power backup system.
Still another object of the present invention is to provide a system and method of operating power backup system with any type of battery.
Another object of the present invention is to provide a system and method for a power backup system having charging mode selection.
SUMMARY
Accordingly the present invention relates to a system and method of multiple battery selection in a power backup system. The backup system includes a charger which is connected to the controller to charge the battery of any type or any capacity. The details of the type of battery and voltage compatibility are stored in the controller of the power backup system.
The batteries may further be rechargeable batteries of various types such as flooded lead acid, tubular lead acid, sealed maintenance free AGM or Gel type, lithium-ion, nickel-cadmium, nickel-metal hydride batteries or any other kind of charge storage device/batteries.
STATEMENT OF INVENTION
According to this invention, there I provided a system for multiple battery selection in a power backup system comprises a battery selector circuit connected to a controller with battery selection and charger selection logic, user selection interface unit to select the type of battery and charger unit connected to the controller to charge battery.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Further objects and advantages of this invention will be more apparent from the ensuing description when read in conjunction with the accompanying drawings and wherein:
Fig. 1 shows block diagram of a system and method of multiple battery selection according to the present invention;
Fig 2 shows the flow chart according to the present invention.
DETAILED DESCRIPTION OF THE INVENTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS
The present invention discloses a system and method of multiple battery selection in a power backup system. Reference may be made to Figure 1 which shows the block diagram of a power backup system with multiple battery and charger selection. The backup system comprises a battery selector circuit 1 connected to the controller 2 to select the plurality/ any type of batteries 4. User selects the type of battery 4 through battery user selection interface unit 3 which is displayed in the display 3A. All the details of the type of battery 4 are stored in the controller 2 of the power backup system. The selector circuit 1 includes a comparator configured to compare input signal representative of the DC power source with predefined condition. The required condition for charging different type of batteries is stored in the controller 2. As the type of battery is identified, the controller compares and identifies the respective charging parameters such as but not limited to boost and absorption voltage and current. The boost and absorption voltage changes depending on the type of battery used. The system shows the variation with difference/ or fluctuation in the voltage and this switch can change the mode of the backup system.
The backup system includes a charger 5 which is connected to the controller 2 to charge the battery 4 of any type or any capacity. The details of the type of battery 4 and voltage compatibility are stored in the controller 2 of the power backup system. The charger 5 is controlled by the controller 2. The controller 2 provides the charging parameters to the charger after identifying the type of the battery 4 and the charger 5 charges the battery 4 as per those parameters.
Fig 2 is the flow chart according to the present invention. As the user selects the type of
battery 4 such as but not limited to the type 1, 2, 3, 4 N, the controller 2 checks and
displays the selected battery. The controller then selects the respective parameters such as but not limited to the Battery voltages V1, V2, V3....VN and battery current I1, 12, 13....IN. The controller sets the voltage and current level references for boost / absorption / float modes with respect to the selected battery and continues the charging according to the charger algorithms and user's setting
It is to be noted that the present invention is susceptible to modifications, adaptations and changes by those skilled in the art. Such variant embodiments employing the concepts and features of this invention are intended to be within the scope of the present invention, which is further set forth under the following claims:-

WE CLAIM;
1. A system for multiple battery selection in a power backup system comprises a battery selector circuit connected to a controller with battery selection and charger selection logic, user selection interface unit to select the type of battery and charger unit connected to the controller to charge battery.
2. A system for of multiple battery selection in a power backup system, as claimed in claim 1, wherein the controller stores the details of the type of battery.
3. A system for multiple battery selection in a power backup system, as claimed in any of the preceding claims wherein, the selector circuit includes a comparator configured to compare input signal representative of the DC power source with the predefined parameters.
4. A system for multiple battery selection in a power backup system, as claimed in any of
the preceding claims wherein, the parameters for charging different type of batteries are stored in the controller.
5. A system for multiple battery selection in a power backup system, as claimed in any
of the preceding claims wherein, the system charges any number and any type/
capacity of battery.
6. A system for multiple battery selection in a power backup system, as claimed in any of
the preceding claims wherein, the controller selects the parameters such as but not
limited to the Battery voltages V1, V2, V3....Vn and battery current I1, 12,13....as per
the type of batteries.
7. A system for multiple battery selection in a power backup system, as claimed in any
of the preceding claims wherein, the controller sets the voltage and current level
references for boost / absorption / float modes with respect to the selected battery and
continues the charging according to the charger algorithms and user's setting
8. A system for multiple battery selection in a power backup system, as claimed in any of
the preceding claims wherein, the batteries are such as but not limited to the
rechargeable batteries of various types such as flooded lead acid, tubular lead acid,
sealed maintenance free AGM or Gel type, lithium-ion, nickel-cadmium, nickel-metal
hydride batteries, or the like.

9. A system for multiple battery selection in a power backup system substantially as
herein described with reference to the accompanying drawings.