Description:FIELD OF DISCLOSURE
[0001] The present disclosure relates to a system for remote switching OFF a battery using a relay and methods thereof using Internet of Things and specifically to enabling switching off a battery remotely by a user/centralized server through a low voltage relay and a battery management system.

BACKGROUND OF THE DISCLOSURE
[0002] The background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] A battery may be defined as a container consisting of one or more cells, in which chemical energy is converted into electricity and used as a source of power. Such batteries are having its application in vast domains, and one such application is in an electric vehicle (EV). In a conventional approach, the electric vehicle batteries which store high energy use Battery Management System for collecting voltage, current, and temperature parameters of the cells and battery pack, state-of-charge estimation, charge-discharge process management, manage cut-off voltage for charging and discharging, battery balancing management, heat management, data communication, and safety management.
[0004] In batteries or cells, the lower cut-off (final) voltage is the prescribed lower-limit voltage at which battery / cell discharge is considered complete. The lower cut-off voltage is usually chosen so that the maximum useful capacity of the battery is achieved. The lower cut-off voltage is different from one battery to the other and it is highly dependent on the type of battery and the kind of service in which the battery is used.
[0005] Lower Cut off voltage protects the battery / cell from reaching a depth of discharge that may damage them and reduce their lifespan.
[0006] Battery Management System (BMS) checks for lower Cut Off Voltage and if low voltage is detected then BMS will turn off the output MOSFETS so the battery is disconnected from the load. In commercial applications it may be required to switch off the battery in extraordinary situations from cloud-based applications. As an example, after theft of the Electric Vehicle or Battery, there may be a requirement to switch off the battery remotely. In certain other instances, a requirement may arise where the battery has to be turned off and there is no physical access to the battery.
[0007] In an instance, the main power supply from the battery can have a voltage from 24VDC to 360VDC based on end application. Output current can be from 6A to 200A based on application.
[0008] The presently available option to switch OFF a battery remotely may be by installing a Relay / Switch (Solid State Relay or a Mechanical Relay ) on the main power supply to Switch off the battery. The Relay has to work at high voltage and high current rating in this case.
[0009] Mechanical Relays are not advisable or suitable for higher voltage requirements as they can also lead to DC arching during contact.
[00010] Solid State Relays are DC to DC relays with 48V+ voltage requirement, which leads to the generation of heat at high current ratings (Amp) and lead to power losses, and therefore cannot be effectively used inside a battery pack which is airtight and has no means of heat dissipation within.
[00011] Therefore, there is a need in the art to provide a solution that enables remote switching OFF of a battery and is cost efficient and simple in operation.

OBJECTS OF THE INVENTION
[00012] Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as listed herein below.
[00013] It is an object of the present disclosure to provide a system and a method to enable remote switching OFF of a battery pack.
[00014] It is another object of the present disclosure to provide a system and a method for remote switching OFF of a battery pack which has reduced generation of heat, and has minimal power losses in comparison to conventional methods.
[00015] It is yet another object of the present disclosure to provide a system and a method for remote switching OFF of a battery pack that is cost effective and convenient in operation.
[00016] It is yet another object of the present disclosure to provide a system and a method for remote switching OFF a battery pack using a Low-Voltage relay and a Battery management system.

SUMMARY
[00017] This summary is provided to introduce simplified concepts of a low voltage relay based on a system for remote switching of a battery, which are further described below in the Detailed Description. This summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended for use in determining/limiting the scope of the claimed subject matter.
[00018] The present disclosure relates to a system for remote switching OFF a battery using a relay and methods thereof using Internet of Things and specifically to enabling switching off a battery remotely by a user/centralized server through a low voltage relay.
[00019] A system for remote switching OFF a battery remotely is disclosed. A plurality of battery cells is connected in a series and to a Battery Management System (BMS). The Battery Management System detects a pre-defined cut-off voltage of the series of cells. A Low-Voltage relay is connected between the Battery Management System and the series of cells, such that on actuation of the Low-Voltage relay the battery is switched OFF by the Battery Management System after detection of Lower cut-off voltage of the series. A method for remote switching OFF a battery is also disclosed.
[00020] Various objects, features, aspects and advantages of the present disclosure will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like features.
[00021] Within the scope of this application, it is expressly envisaged that the various aspects, embodiments, examples and alternatives set out in the preceding paragraphs, in the claims and/or in the following description and drawings, and in particular the individual features thereof, may be taken independently or in any combination. Features described in connection with one embodiment are applicable to all embodiments, unless such features are incompatible.

BRIEF DESCRIPTION OF DRAWINGS
[00022] The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure. The diagrams are for illustration only, which thus is not a limitation of the present disclosure, and wherein:
[00023] FIG. 1 illustrates a schematic representation of the prior art that utilizes a High Voltage relay to switch OFF the battery.
[00024] FIG. 2 illustrates a schematic representation of an embodiment of a battery with a low voltage relay to switch OFF the battery in accordance with the present disclosure.
[00025] FIG. 3 is a flow chart of the method for remote switching OFF a battery in accordance with the present disclosure.

DETAILED DESCRIPTION
[00026] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[00027] In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present invention. It will be apparent to one skilled in the art that embodiments of the present invention may be practiced without some of these specific details.
[00028] If the specification states a component or feature “may”, “can”, “could”, or “might” be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
[00029] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[00030] FIG. 1 illustrates a schematic representation of the prior art that utilizes a High Voltage relay to switch OFF the battery. Referring to FIG.1, which is an exemplary illustration of a prior art battery, a 8S-24V-6Ah battery pack is disclosed which comprises a plurality of cells S1-S8 110 that are connected in series. The battery pack consists a battery casing 102, a charging port 106, a discharging port 104 that connect to the series of cells through a high voltage power line. The Battery may comprise an IOT device that actuates a HV relay. The battery may be remotely switched OFF with the help of the HV relay. However, as the HV relay connects to the discharging port, and is the main power line carrying the High Voltage, the heat generated is much greater when the battery is switched OFF using a HV relay.
[00031] The present invention enables remote switching OFF a battery by replacing the High Voltage Relay on HV power line with a Low Voltage Relay on low voltage series line.
[00032] The present disclosure relates to a system for remote switching OFF a battery using a relay and methods thereof using Internet of Things and specifically to enabling switching off a battery remotely by a user/centralized server through a low voltage relay and the battery management system
[00033] FIG. 2 illustrates a schematic representation of an embodiment of a battery with a low voltage relay to switch OFF the battery in accordance with the present disclosure.
[00034] Referring to FIG. 2, which is an exemplary embodiment, the system 200 includes a charging port 208 and a discharging port 206. The charging port 208 and the discharging port 206 are operatively coupled to the battery management unit, and may be configured for charging and discharging of the battery cells S1-S8 216. The battery consists a High Voltage power line 210 that transfers the power from the cells to the discharging port. The Battery Management System detects the voltage across the cells and on the lower cut-off voltage being reached, the BMS disconnects the battery.
[00035] The low voltage line 214 connects the series battery cells with the BMS through a Battery OFF device 212. The battery OFF device 212 contains a LV relay that is actuated by an IOT device. The IOT device may be provided instructions to switch OFF by a network over any of a WiFi, Bluetooth, GSM, CDMA, or even over a cellular network.
[00036] A battery casing 204 may be provided around the battery and the charging and discharging ports may be embedded into the casing.
[00037] In an aspect, a system for remote switching OFF a battery remotely is disclosed, the system includes a battery comprising a plurality of battery cells connected in a series and to a Battery Management System (BMS), such that the Battery Management System detects a pre-defined lower cut-off voltage of the series of cells, a Low-Voltage relay connected between the Battery Management System and the series of cells, such that on actuation of the Low-Voltage relay the battery is switched OFF.
[00038] In an embodiment, the pre-defined lower cut-off voltage is determined by a rating of the battery and number of the battery cells in said battery.
[00039] In an embodiment, the battery switching OFF is effected when the battery is disconnected from a load. In an embodiment the lower cut-off voltage is a voltage at which the battery is discharged. The relay operates for a small duration to switch OFF the battery. The battery comprises a charging port, a discharging port which may be embedded or protruding from within a battery casing.
[00040] In an aspect, a method for remote switching OFF a battery, comprising: connecting a low-voltage relay to a low-voltage series line between a Battery Management System and a series of cells, switching OFF, by an IOT device the low-voltage series line by actuating a relay such that on the relay switching off the low-voltage series, a low-voltage condition is detected by the Battery Management System, switching OFF the battery, by the Battery Management System, on detecting a low-voltage condition in the series of cells.
[00041] The Battery Management System is configured to turn off output MOSFETs to disconnect the battery from the load. The relay operates for a small duration to switch OFF the battery.
[00042] FIG. 3 is a flow chart of the method for remote switching OFF a battery in accordance with the present disclosure.
[00043] The method 300 includes, connecting 302 a low-voltage relay to a low-voltage series line between a Battery Management System and a series of cells. The switching OFF 304 is effected by an IOT device on the low-voltage series line by actuating a relay such that on the relay switching off the low-voltage series, a low-voltage condition is detected by the Battery Management System. The method then includes switching OFF the battery 304, by the Battery Management System, on detecting a low-voltage condition in the series of cells. On a user disconnecting the load and reconnecting said load, the Battery Management System detects a voltage value higher than the lower cut-off voltage and switches ON the battery.
[00044] While some embodiments of the present disclosure have been illustrated and described, those are completely exemplary in nature. The disclosure is not limited to the embodiments as elaborated herein only and it would be apparent to those skilled in the art that numerous modifications besides those already described are possible without departing from the inventive concepts herein. All such modifications, changes, variations, substitutions, and equivalents are completely within the scope of the present disclosure. The inventive subject matter, therefore, is not to be restricted except in the spirit of the appended claims.

ADVANTAGES OF THE INVENTION
[00045] The present invention provides an improved system for remotely switching OFF a battery.
[00046] The present invention provides an improved system that allows switching with a basic single low voltage channel relay, as series level voltage is less than 5v.
[00047] As per the present disclosure, the low voltage relay only has to operate for a small duration to switch off the battery.
[00048] The present disclosure provides an approach that eliminates the relay heating problem as it operates at lower voltage and for a lower duration.
[00049] The present disclosure provides a system such that the size and cost of the relay is significantly less compared to standard options.
[00050] The system and a method for remote switching OFF of a battery pack has reduced generation of heat, and his minimal power losses in comparison to conventional methods.
[00051] The present disclosure provides a system and a method for remote switching OFF of a battery pack that is cost effective and convenient in operation.
[00052] The present disclosure provides a system and a method for remote switching OFF a battery pack using a Low-Voltage relay and avoids risk of heat and fire compared to conventional method.

, Claims:1. A system for remote switching OFF a battery remotely, said system comprising:
a battery comprising a plurality of battery cells connected in a series and to a Battery Management System (BMS), such that the Battery Management System detects a pre-defined lower cut-off voltage of the series of cells, a Low-Voltage relay connected between the Battery Management System and the series of cells, such that on actuation of the Low-Voltage relay the battery is switched OFF.
2. The system as claimed in claim 1, wherein the pre-defined lower cut-off voltage is determined by a rating of the battery and number of the battery cells in said battery.
3. The system as claimed in claim 1, wherein the battery switching OFF is effected when the battery is disconnected from a load.
4. The system as claimed in claim 1, wherein the lower cut-off voltage is a voltage at which the battery management system cuts-off battery from the load to protect the life of the battery.
5. The system as claimed in claim 1, wherein the relay operates for a small duration to create the pre-defined lower cut-off voltage situation for the battery management system which switches OFF the battery.
6. A method for remote switching OFF a battery, comprising:
connecting a low-voltage relay to a low-voltage series line between a Battery Management System and a series of cells;
switching OFF, by an IOT device the low-voltage series line by actuating a relay such that on the relay switching off the low-voltage series, a lower cut-off voltage condition is detected by the Battery Management System;
switching OFF the battery, by the Battery Management System, on detecting the lower cut-off voltage condition in the series of cells and switching OFF the battery, by the Battery Management System.

7. The method as claimed in claim 6, wherein the Battery Management System is configured to turn off output MOSFETs to disconnect the battery from a load.
8. The method as claimed in claim 6, wherein the relay operates for a small duration to switch OFF the battery.
9. The method as claimed in claim 6, wherein on a user disconnecting the load and reconnecting said load, the Battery Management System being configured to detect voltage value higher than the lower cut-off voltage and switch ON the battery.