Description:FIELD OF THE INVENTION
The present invention relates to a field of battery management. More specifically, the present invention relates to system for managing heat sensitive batteries used in electric vehicles.
BACKGROUND OF THE INVENTION
This section is intended to provide information relating to the field and background of the invention and thus any approach/functionality described below should not be assumed to be qualified as prior art merely by its inclusion in this section.
In the recent times we have witnessed electric vehicle batteries immolates, due to weather conditions. Now-a-days the climatic conditions are mostly hot and dry or hot and humid. In these conditions, electric vehicle batteries are put under heat stress as constant acceleration and deceleration heats up the batteries. Therefore, battery management systems of these vehicles must have sensitive heat sensing systems. A mechanism must be designed for battery management systems utilized in electric vehicles which cut off the current supply if the battery temperature reaches a certain temperature to protect the battery from immolation.
Lithium batteries are high-performing devices and offer countless advantages over traditional batteries. They also have a weak point, however manufacturers are unable to ensure production uniformity from one lithium cell to another.
Although all of their characteristics exceed rated values, the cell faces
? Differences in rated capacity
? Differences in internal resistance
? Differences in self-discharge
As time passes these differences, even if small, cause the cells inside the battery to go out of balance. This imbalance can lead to a 3% to 6% difference between the cells, depending on the conditions of use and ageing of the lithium battery.
Since the cells are connected in series inside the battery, they are charged and discharged with the same level of energy. This means that without an appropriate cell balancing system, the difference between the cells would increase more and more gradually draining available capacity.
The conventional battery management system counteracts the cell balancing by applying resistance to the cells with a higher charge until the weaker cells catch up to that level.
OBJECT OF THE INVENTION
This section is intended to introduce certain objects of the disclosed methods and systems in a simplified form, and is not intended to identify the key advantages or features of the present disclosure.
The main object of the present invention is to provide a battery management system for heat sensitive batteries in electrical vehicles.
Another object of the present invention is to provide a battery management system for heat sensitive batteries in electrical vehicles thereby improving the safety rate of electrical vehicles.
.A further object of the present invention is to provide a battery management system for heat sensitive batteries in electrical vehicles that balances battery with combined balancing i.e. both active & passive balancing.
It is still further object of the present invention to provide a battery management system for heat sensitive batteries in electrical vehicles that produces atleast 20 times higher current than the conventional batteries.
It is still further another object of the present invention to provide a battery management system for heat sensitive batteries in electrical vehicles that has a good heat dissipation effect.
These and other objects, features and advantages of the present invention will become more apparent from the following description when taken in connection with the accompanying drawing which shows, for the purpose of illustration only, one embodiment in accordance with the present invention.
SUMMARY OF THE INVENTION
This summary is provided to introduce a selection of concepts in a simplified format that are further described in the detailed description of the invention. This summary is not intended to identify key or essential inventive concepts of the invention, nor is it intended for determining the scope of the invention.
The present invention discloses a battery management system for electrical vehicles comprising battery pack (3) including multiple lithium ion battery cells; a protection board for the battery pack, a cooling system including a TEC plate (7), a coolant (2), a pump (4) for the transfer of the coolant (2), a cooling fan (9), a heat sink (8); an indicator system including a temperature controller (1), a display (12), an alarm (14), an indicator light (13); a battery balancing system for balancing the lithium ion battery by acting on each battery cell with combined balancing i.e. active and passive balancing; and a cut-off system for avoiding an accidents in case of failure of the cooling system.
To the accomplishment of the foregoing and related ends, certain illustrative aspects of the disclosure are described herein in connection with the following description. These aspects are indicative, however, of but a few of the various ways in which the principles of the disclosure can be employed and the subject disclosure is intended to include all such aspects and their equivalents. Other advantages and novel features will become apparent from the following detailed description of the disclosure.
To further clarify advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof, which is illustrated in the appended drawing. It is appreciated that this drawing depicts only typical embodiments of the invention and are therefore not to be considered limiting its scope. The invention will be described and explained with additional specificity and detail with the accompanying drawings.

BRIEF DESCRIPTION OF DRAWING

In order to better understand the present invention of a battery management system for electrical vehicles, the characteristics of object of the present invention, will be better viewed from the detailed description hereinafter, which is only for a way of example, associated to the drawing referenced below, which are an integral part of this application. The parts in the drawing are not drawn to scale; the main objective is to understand the components, their arrangement and their working.
FIG. 1 is a conventional battery management system with respect to battery charging and discharging.
FIG. 2 is a perspective view of the battery management system in accordance to the present invention.
FIG. 3 is a wiring diagram of the battery management system in accordance to the present invention.
FIG. 4 is a schematic diagram of the battery balancing system of the battery management system with active and passive balancing of current in accordance to the present invention.
FIG. 5 is a schematic diagram of the cooling system of the battery management system in accordance to the present invention.
FIG. 6 is a schematic diagram of the indicator system of the battery management system in accordance to the present invention.
FIG. 7 is a protection board of the battery management system in accordance to the present invention.
Further, skilled artisans will appreciate that elements in the drawing are illustrated for simplicity and may not have been necessarily been drawn to scale. Furthermore, in terms of the construction of the product, have been represented in the drawings by conventional symbols, and the drawing may show only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the drawings with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein.

DETAILED DESCRIPTION
For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated system and/or method, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates.
It will be understood by those skilled in the art that the foregoing general description and the following detailed description are explanatory of the invention and are not intended to be restrictive thereof.
Reference throughout this specification to “an aspect”, “another aspect” or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrase “in an embodiment”, “in another embodiment” and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment.
As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless expressly stated otherwise. It will be further understood that the terms “includes”, “comprises”, “including” and/or “comprising” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being “connected” or “coupled” to another element, it can be directly connected or coupled to the other element or intervening elements may be present. Furthermore, the term “and/or” includes any and all combinations and arrangements of one or more of the associated listed items.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Any headings provided herein are for convenience only and do not necessarily affect the scope or meaning of the claimed invention.
Embodiments of the present invention will be described below in detail with reference to the accompanying drawing.
The detailed description of a battery management system for electrical vehicles; object of the present invention will be made in accordance with the identification of components that form the basis of the figure described above.
After observing all the above problems in the prior art, the idea of constructing heat sensitive battery management system disclosed in the present invention detailed description which is effective and efficient comparing to the conventional ones.
As shown in FIG. 2 to FIG. 4, the present invention discloses a battery management system for electrical vehicles comprising battery pack (3) including multiple lithium ion battery cells; a protection board for the battery pack, a cooling system including a TEC plate (7), a coolant (2), a pump (4) for the transfer of the coolant (2), a cooling fan (9), a heat sink (8); an indicator system including a temperature controller (1), a display (12), an alarm (14), an indicator light (13); a battery balancing system for balancing the lithium ion battery by acting on each battery cell with combined balancing i.e. active and passive balancing; and a cut-off system for avoiding an accidents in case of failure of the cooling system. The system also comprising temperature controller setting button (mode) (17), temperature controller setting button (+) (18), temperature controller setting button (-) (19), thermometer wire (16), charging cable (15), anode (11), cathode (10).
According to an embodiment of the present invention as shown in FIG. 5, the pump (4) of the cooling system is used to move the liquid coolant (2) across the battery (3) in a BMS cooling system. The Thermoelectric Peltier plate (7) is acquainted alongside the fan (9) with limit within battery temperature. The pump's (4) first end is connected to the first point of the TEC plate (7). The second point of the TEC plate (7) is where the coolant (2) pipe connects to one end of the battery (3) and the pump (4) again from the second end of the battery pack (3). The coolant (2) temperature rises in tandem with the battery's (3) internal temperature. Then, at that point, the temperature of the coolant (2) emerging from the battery pack (3) is cooled by passing it across the Sleuth plate and the fan (9) alongside the intensity sink (8). The internal battery temperature is maintained throughout the cooling system in this manner. The cooling system further comprises an alarm system giving signal if the temperature of the battery exceeds beyond limit.
According to an embodiment of the present invention as shown in FIG. 6, the temperature controller (1) is used to regulate the temperature by comparing a sensor signal to a set point. The indicator system sends a signal to the set temperature when the battery (3) temperature is too high. When the temperature of the battery rises above the limit the indicator light (13) blinks.
According to an embodiment of the present invention, the battery pack with the battery balancing system produces atleast 20 times higher current.
, Claims:CLAIMS
We Claim:
1. A battery management system for electrical vehicles consisting of:
a battery pack (3) consisting of a plurality of battery cells;
a protection board for the battery pack;
a cooling system consisting of:
a Thermoelectric plate (7);
a coolant (2);
a pump (4) for the transfer of the coolant (2);
a heat sink (8);
a cooling fan (9);
an indicator system consisting of:
a temperature controller (1);
a display (12);
an alarm (14);
an indicator light (13);
characterized in that,
a battery balancing system for balancing the battery (3) by acting on each battery cell with combined balancing; wherein the combined balancing is active balancing and passive balancing;
2. The battery management system for electrical vehicles as claimed in claim 1, wherein the battery management system further consisting of cut-off system for avoiding an accidents in case of failure of the cooling system.
3. The battery management system for electrical vehicles as claimed in claim 1, wherein the alarm and the indicator light (13) sends signal if the temperature of the battery (3) exceeds beyond limit.
4. The battery management system for electrical vehicles as claimed in claim 1, wherein the battery pack (3) with the battery balancing system produce at least 20 times higher current.
5. The battery management system for electrical vehicles as claimed in claim 1, wherein the battery management system increases safety rating and the battery pack (3) consisting of plurality of lithium ion battery cells.