Description:FIELD OF THE INVENTION
[0001] The present application relates to the domain of a battery pack, more specifically the present application is related to a degassing system for the battery pack.

BACKGROUND
[0002] Battery pack, such as Lithium-ion Li-ion battery pack or the like, are used to power components in applications, such as electric vehicles, hybrid vehicles, mobile phones, laptops, medical equipment’s or the like. A battery pack has a plurality of cells in electrical connection with each other.

[0003] A lithium-ion battery is usually constituted of a positive electrode, a negative electrode, an electrolyte, and a separator. As a positive electrode active material to be used for the positive electrode, lithium cobaltate, manganese spinel, or the like are mainly used. Since the positive electrode active material has a high electric resistance, the electric resistance of the positive electrode is decreased by using carbon-based conductive additives. As a binder, for example, styrene-butadiene rubber, fluororubber, synthetic rubber, a polymer such as polyvinylidene fluoride, an acryl resin, or the like are used.

[0004] A negative electrode active material to be used is natural graphite, artificial graphite obtained by thermally treating coal, petroleum pitch or the like at a high temperature, amorphous carbon obtained by thermally treating coal, petroleum pitch coke, acetylene pitch coke or the like, a lithium alloy such as metallic lithium or AlLi, or the like. Further, carbon-based conductive additives are used for a negative electrode in some cases for the purpose of decreasing the resistance.

[0005] A holder used for battery adhesion-fixation structure has been usually provided with multiple holder holes. More specifically, a battery cell is inserted into each of the holder holes and is adhered or bonded with the holder via an adhesive agent onto an inner peripheral face of the holder holes. Moreover, an electrode terminal located at one of the opposite ends of the battery cells is exposed at one of the axials opposite ends of the holder holes. In addition, a bus bar connects electrically between the electrode terminals exposed at the one of the axials opposite ends of the holder holes.

[0006] Battery pack comprises plurality of cells in electrical connection with each other. During operation, each cell generates heat which is to be dissipated from the battery pack to ensure proper operation of the battery pack without failing. More specifically, the battery pack, such as Lithium-ion Li-ion battery pack, have an issue of thermal runaway. For instance, when a cell or an area within the cell or a plurality of cells of a Li-ion battery pack achieves an elevated temperature due to a thermal failure or a mechanical failure or internal or external short circuiting or an electro-chemical abuse a large amount of heat is generated. When the generated heat is larger than the heat dissipation, various side reactions between the components inside the battery pack are induced. This may cause further heat generation and the pressure and the temperature of the battery pack may increase sharply. This may lead to inflammation and/or explosion of the battery pack. This process is referred to as thermal runaway. Accordingly, during operation of the battery pack, to avoid thermal runaway and to ensure proper operation of the battery pack without failing, heat generated by each cell is to be dissipated from the battery pack.

[0007] Conventionally, to dissipate the heat generated in the plurality of cells of the battery pack and to overcome the thermal runaway issue, the battery pack includes liquid-filling materials, such as cooling liquid. However, use of such materials cause handling problems of the battery pack. In some conventional battery pack, Phase Change Material PCM is filled in the battery pack for heat transfer. The PCM absorbs the heat generated by the cells and change its state from liquid to solid. However, the PCM has very low conductivity. Further, the filling material, such as the liquid-filing material and the PCM, is used only at tip of the cells. Therefore, the thermal exchange only occurs at the tip of the cells and the thermal exchange occurring through the surface of the cells is not performed thereby leading to sub optimal cooling of the battery pack.

[0008] The battery manufacturer recommends that the discharge temperature of the battery should be higher than the charging temperature of the battery. Once the batteries are operated, its temperature rises during discharge and immediate charging of the batteries becomes difficult. In addition to this, the lithium-ion battery pack having a plurality of cells are closely packed, the cells located at the central part are inhibited from exhibiting satisfactory thermal radiation due to their neighboring cells and thus results in temperature rise. The plastic cell holder used in lithium-ion batteries are not capable of dissipating the heat sufficiently out of the battery pack. Dissipation of heat within the battery pack results in rise in temperature which is not desirable and also affects the life of the battery. With the better efficiency of the Li-ion cells, issues related to high temperature sometimes may result in failure or malfunctioning of the lithium-ion battery in operation.

[0009] The batteries are usually sealed so as to improve the reliability of batteries and meet the basic waterproof and dustproof requirements. The battery failure caused by battery heating or altitude changes affects the safety of the battery while in use, resulting in different internal pressure and external pressure of the battery. However, too high, or too low air pressure inside the battery is likely to cause structural damage of the sealing surface, resulting in battery failure. Fire and explosion in batteries can take place due to dangerous or abnormal chemical reactions as the battery contains toxic liquids and gases. There is thermal danger which can occur due to high temperature and also there is a possibility of short circuit while carrying out nail penetration test. All above mentioned events triggers the thermal runaway and renders the battery pack unsafe to use.

[00010] In order to avoid any thermal runaway situation, pressure build up and the gasses due to which the pressure has been built up inside the battery pack has to be vented out. Now-a-days, a breather valve type vent has been provided in the battery pack to release the pressure from the battery pack when the vehicle is on high altitude. The breather valve type vent will adjust the difference in the pressure. There are 2 types of breather valve, first type of breather valve adjusts the pressure changes, and the second type of valve is known as thermal runaway vent valve which arrests the thermal runaway in the battery pack. If the temperature inside the battery pack keeps rising beyond a threshold limit, let’s say 80 degree, a separator between an anode and a cathode melts and short circuit takes place as the anode and cathode comes into direct contact to each other. Due to this, the electrolyte decomposition and anode dissolution takes place, leading to high temperature from let’s say 130 degree to 200 degree is reached within 2-3 seconds, followed by explosion of the cells. Such high temperatures can ignite adjacent combustibles, thereby creating a fire hazard. High temperatures can also cause decomposition of some materials and initiation of gas generation. Gases generated during these events can be toxic and / or flammable and can further increase the risks associated with uncontrolled thermal runaway event which is a self-enhanced increasing temperature loop that can lead to battery fires and explosions.

[00011] In light of the aforesaid problem available in the art there is a need to develop a system which will allow the expanding gases generated inside the battery pack during thermal runaway or internal pressure to escape, in order to prevent any further damage to the remaining components of the battery pack. Thus, there is a requirement of a novel system which can withstand high temperatures of thermal runaway and protect the battery pack from internal pressure raises as well as regulate the flow of gases during thermal runaway.

[00012] The above information as disclosed in this background section is only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art.

SUMMARY
[00013] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

[00014] In one of the embodiments of the present application, a degassing system for a battery pack comprising at least one solenoid valve, a tubing layout, one or more sensors and at least one release valve. The tubing layout is placed over plurality of cells of the battery pack and is connected with the at least one solenoid valve. Further, the one or more sensors, is facing towards the plurality of cells of the battery pack. Furthermore, when pressure inside the battery pack crosses a threshold limit, the tubing layout activated using the at least one solenoid until and the tubing layout start sucking releases gases coming from the plurality of cells of the battery pack and passes to the at least one release valve.

[00015] In one of the embodiments of the present application, the at least one solenoid valve is connected with the tubing layout and the at least one release valve.

[00016] In one of the embodiments of the present application, the tubing layout is placed around the periphery of the battery pack. Further, the tubing layout comprising plurality of opening, the plurality of openings is facing towards the plurality of cells of the battery pack.

[00017] In one of the embodiments of the present application, the degassing system comprising one or more sensors. Further, the one or more sensors are placed around the plurality of cells of the battery pack. Furthermore, the one or more sensors are temperature sensor, gas sensors, or combination thereof.

[00018] In one of the embodiments of the present application, the one or more sensors are placed closer to first end of the plurality of the cells. Further, the first end of the plurality of the cells is placed close to the tubing layout.

[00019] In one of the embodiments of the present application, the at least one solenoid valve is made up of a high temperature resistant silicon material.

[00020] In one of the embodiments of the present application, the one or more sensors of the degassing system is connected with a Battery Management System (BMS) of the battery pack.

[00021] In one of the embodiments of the present application, one end of the at least one solenoid valve is connected with a Battery Management System (BMS) of the battery pack.

[00022] In one of the embodiments of the present application, one end of the at least one release valve is connected with the at least one solenoid valve and the other end is protruding from a window of the battery pack.

[00023] In one of the embodiments of the present application, the at least one release valve comprising a gate valve.

[00024] In one of the embodiments of the present application, the threshold limit of the pressure inside the battery pack is 50milibar.

[00025] In one of the embodiments of the present application, a battery pack comprising plurality of cells, a plurality of cell holders, a casing top, a casing bottom and a degassing system. The plurality of cell holders comprising a plurality of conduits which are configured to receive the plurality of cells. The degassing system comprising at least one solenoid valve, a tubing layout, one or more sensors and at least one release valve. The tubing layout is placed over plurality of cells of the battery pack and is connected with the at least one solenoid valve. Further, the one or more sensors, is facing towards the plurality of cells of the battery pack. Furthermore, when pressure inside the battery pack crosses a threshold limit, the tubing layout activated using the at least one solenoid until and the tubing layout start sucking releases gases coming from the plurality of cells of the battery pack and passes to the at least one release valve.

[00026] In one of the embodiments of the present application, the casing top of the battery pack comprising a window.

[00027] In one of the embodiments of the present application, the casing top and the casing bottom being parts of a casing of the battery pack. Further, the casing top and the casing bottom being placed opposite to each other. Furthermore, the casing top and the casing bottom being connected with each other to form a casing of the battery pack.

[00028] In one of the embodiments of the present application, the casing being made of a thermally conductive material and an electrically insulating material.

[00029] In one of the embodiments of the present application, Battery Management System (BMS) of the battery pack is connected with the one or more sensors of the degassing system. Further, the one or more sensors are temperature sensor, pressure sensor, gas sensor or combination thereof.

[00030] In one of the embodiments of the present application, the one or more sensors are placed closer to a first end of the plurality of the cells. Further, the first end of the plurality of the cells is placed close to the tubing layout.

[00031] In one of the embodiments of the present application, the tubing layout is placed closer to the casing top.

[00032] In one of the embodiments of the present application, one end of the at least one release valve is connected with the at least one solenoid valve and other end is protruding from the window in the casing top of the battery pack. Further, the at least one solenoid valve 214 is connected with the tubing layout and the at least one release valve.

[00033] In one of the embodiments of the present application, the BMS is present between the casing top and the tubing layout.

[00034] In one of the embodiments of the present application, the at least one release valve is placed substantially perpendicularly to the tubing layout.

[00035] In one of the embodiments of the present application, the at least one solenoid valve is connected with the Battery Management System (BMS) of the battery pack and wherein the BMS and the at least one solenoid valve is connected with the casing top of the battery pack 100.

[00036] In one of the embodiments of the present application, the tubing layout is placed around the periphery of the battery pack. Further, the tubing layout comprising plurality of opening, the plurality of openings is facing towards the plurality of cells of the battery pack.

[00037] In one of the embodiments of the present application, the battery pack 100 comprises at least one layer of Thermal Interface Material TIM.

[00038] In one of the embodiments of the present application, the casing comprises a plurality of heat dissipating fins. Further, the plurality of heat dissipating fins being disposed on an outer surface of the casing top and the casing bottom.

[00039] In one of the embodiments of the present application, a vehicle comprising one or more battery packs.

BRIEF DESCRIPTION OF FIGURES:
[00040] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate preferred embodiments of the invention, and together with the general description given above and the detailed description given below, serve to explain features of the invention.

[00041] Figure 1 illustrates a battery pack as per one of the embodiments of the present invention.

[00042] Figure 2a illustrates exploded top view of the battery pack as per one of the embodiments of the present invention.

[00043] Figure 2b illustrates exploded bottom view of the battery pack as per one of the embodiments of the present invention.

[00044] Figure 3 illustrates an assembly view of the components inside the battery pack as per one of the embodiments of the present invention.

[00045] Figure 5 illustrates an exploded view of the components inside the battery pack as per one of the embodiments of the present invention.

DETAILED DESCRIPTION
[00046] Exemplary embodiments detailing features of a battery pack in accordance with the present subject matter will be described hereunder with reference to the accompanying drawings. Various aspects of different embodiments of the present invention will become discernible from the following description set out hereunder. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the present subject matter. Further, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. Additionally, all numerical terms, such as, but not limited to, “first”, “second”, “third”, “primary”, “secondary”, “main” or any other ordinary and/or numerical terms, should also be taken only as identifiers, to assist the reader's understanding of the various elements, embodiments, variations and/or modifications of the present disclosure, and may not create any limitations, particularly as to the order, or preference, of any element, embodiment, variation and/or modification relative to, or over, another element, embodiment, variation and/or modification.

[00047] The following detailed description refers to the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the following description to refer to the same or similar elements. While embodiments may be described, modifications, adaptations, and other implementations are possible. For example, substitutions, additions, or modifications may be made to the elements illustrated in the drawings, and the methods described herein may be modified by substituting, reordering, or adding stages to the disclosed methods. Accordingly, the following detailed description does not limit the claimed subject matter. Instead, the proper scope of the claimed subject matter is defined by the appended claims. It should be noted that the description and figures merely illustrate principles of the present subject matter. Various arrangements may be devised that, although not explicitly described or shown herein, encompass the principles of the present subject matter. Moreover, all statements herein reciting principles, aspects, and examples of the present subject matter, as well as specific examples thereof, are intended to encompass equivalents thereof.

[00048] Further, various embodiments disclosed herein are to be taken in the illustrative and explanatory sense and should in no way be construed as limiting of the present disclosure. All joinder references e.g., attached, affixed, coupled, disposed, etc. are only used to aid the reader's understanding of the present disclosure, and may not create limitations, particularly as to the position, orientation, or use of the systems and/or methods disclosed herein. Therefore, joinder references, if any, are to be construed broadly. Moreover, such joinder references do not necessarily infer those two elements are directly connected to each other.

[00049] It will also be appreciated that one or more of the elements depicted in the drawings/figures can also be implemented in a more separated or integrated manner, or even removed or rendered as inoperable in certain cases, as is useful in accordance with a particular application. Additionally, any signal hatches in the drawings/figures should be considered only as exemplary, and not limiting, unless otherwise specifically specified.

[00050] With the initiation of electric vehicles and electric vehicles, there is a growing interest in an automotive industry to develop electrical machines which dissipate heat properly from the cells of the battery pack, light in weight, utilize less space and are efficient in operation. Therefore, the direction of innovation in designing electrical machines is to develop electrical machines which have good heat dissipation, lighter in weight and compact size for a given power rating, or for a given size, power rating should be more than the present rating. However, in general, close packaging of components in compact machines leads to greater electrical and magnetic interactions between the components and may lead to high core losses in case of electrical machines using permanent magnets.

[00051] Batteries are usually sealed so as to improve the reliability of batteries and meet the basic waterproof and dustproof requirements. In the use process of the battery, battery failure caused by battery heating or altitude changes affects the use safety of the battery, resulting in different internal pressure and external pressure of the battery. However, too high or too low air pressure inside the battery is likely to cause structural damage of the sealing surface, resulting in battery failure.

[00052] Battery pack comprises a plurality of cells in electrical connection with each other. During operation, each cell generates heat which is to be dissipated from the battery pack to ensure proper operation of the battery pack without failing. More specifically, battery pack, such as Lithium-ion Li-ion battery pack or the like, have an issue of thermal runaway. For instance, when a cell, an area within the cell, or a plurality of cells of a Li-ion battery pack achieves an elevated temperature due to a thermal failure, a mechanical failure, internal or external short circuiting, or an electro-chemical abuse, a large amount of heat is generated. When the heating generated is larger than the heat dissipation, various side reactions between components inside the battery pack are induced. This may cause further heat generation and the pressure and the temperature of the battery pack may increase sharply. This may lead to inflammation and/or explosion of the battery pack. This process is referred to as the thermal runaway.

[00053] In the domain of automobile, safety of lithium-ion batteries is a topmost priority. Conventional small cell batteries and large cell batteries have several serious drawbacks. For example, the small cells usually have the disadvantages constrained by the housing or “can” and are partly due to mechanical stress or electrolyte depletion, cycle life and calendar life. Cause restrictions. When the lithium-ion battery is charged, these electrodes tend to expand. Being a can limits the jelly roll structure of the electrode and creates mechanical stresses in the jelly roll structure that limit the life cycle. As more and more storage capacity are desired, more active anode and cathode materials are inserted into a given volume of can, which further creates mechanical stress on the electrodes of the battery. In order to overcome said problem, particularly with regard to long-life batteries, users must compromise performance by reducing the state of charge, limiting the available capacity of the cell, or reducing the charge rate.

[00054] Another problem with the large cells is with regard to the safety. More specifically, the energy released in the cell going into thermal runaway is proportional to the amount of available electrolyte present in the cell during the thermal runaway scenario. As the cell becomes larger, more free space is available for the electrolyte to fully saturate the electrode structure. Since the amount of electrolyte per watt for large cells is usually greater than for small cells. Further, large cell batteries are gaining more momentum during thermal runaway and are therefore less secure. Since in any thermal runaway, larger the fuel electrolyte, the larger the flame. In addition, once a large cell is in thermal runaway mode, the heat generated by the cell triggers a thermal runaway reaction in adjacent cells, causing the entire pack to be destroyed, with massive destruction to the pack and peripheral devices. The user may be in a dangerous state by causing a cascade effect to ignite.

[00055] The present subject matter relates to heat transfer in power unit assembly such as but not limited to battery pack assemblies. With the implementations of the present subject matter, heat generated by the cells of the battery pack assemblies can be efficiently dissipated from the battery pack assemblies, thereby, the thermal runaway can be eliminated.

[00056] With reference to figure 1, in which a power unit assembly 100 is shown. The power unit assembly 100 comprises a casing to provide a cover and to protection to the components of the power unit assembly 100. Particularly, the casing encloses the plurality of cells present inside the power unit assembly 100. In addition to providing cover and protecting components of the power unit assembly 100, the casing may facilitate dissipating the heat away from the power unit assembly 100 to the surroundings. The power unit assembly 100 may be a battery pack, also in the present specification the terms battery pack and power unit assembly are used interchangeably. Accordingly, in an example, the casing may be made of a thermally conductive and electrically insulating material. The power unit assembly 100 comprises a casing top 102 and a casing bottom 104. The casing top 102 is placed opposite to the casing bottom 104. Further, the casing top 102 and the casing bottom 104 are connected with each other to form the casing of the power unit assembly 100. The battery back also comprises an opening 106 for dissipating heat and/or harmful gases which are produced inside the battery pack 100.

[00057] In one of the embodiments of the present application, the battery pack 100 also comprises plurality of heat dissipating fins present on both the casing top 102 and the casing bottom 104 for dissipating heat from inside the battery pack 100 to the surroundings. The casing top 102 and the casing bottom 104 comprises an inner area which is facing inside the battery pack 100 and an outer area which is opposite to the inner area and comprises plurality of heat dissipating fins 106.

[00058] In one of the embodiments of the present application, the battery pack 100 also comprises one or more layer of Thermal Interface Materials TIM. TIM is used to remove the excess heat from battery pack 100 to the surrounding to regulate the temperature of the plurality of cells 206 inside the battery pack 100 and to improve the functionality of the of the plurality of cells 206 which will result in prolong life of the plurality of cells 206 and the battery pack 100.

[00059] With reference to figure 2a, the same illustrates 200a exploded view from the top side of the battery pack 100 and figure 2b illustrates 200b exploded view from the bottom side of the battery pack 100. Figure 3 illustrates an assembly view of the components inside the battery pack 100. Figure 4 illustrate the exploded view of the components inside the battery pack 100. For the sake of brevity, figures 1 to 4 are explained in conjunction with each other.

[00060] With reference to figure 2, an exploded view 200a, 200b of the battery pack 100 is shown. In the exploded view 200a exploded view from the top side of the battery pack 100 is shown and in the exploded view 200b exploded view from the bottom side of the battery pack 100 is shown. The battery pack 100 comprises the casing top 102 and the casing bottom 104 and a degassing system. The degassing system comprising at least one solenoid valve 214, a tubing layout 210, one or more pressure sensor 212 and at least one release valve 202. The tubing layout 210 is placed over plurality of cells 206 of the battery pack 100 and the one or more sensors 212 is facing towards the plurality of cells 206 of the battery pack 100. Further, the at least one solenoid valve 214 is connected with the tubing layout 210. Furthermore, wherein when pressure inside the battery pack 100 crosses a threshold limit, the tubing layout 210 activated using the at least one solenoid valve 214 and the tubing layout 210 start sucking released gases coming from the plurality of cells 206 of the battery pack 100 and passes to the at least one release valve 202. The released gasses willed be passed to the outer environment from the at least one release valve 202.

[00061] The at least one solenoid valve 214 is connected with the tubing layout 210 and the at least one release valve 202. Further, the at least one solenoid valve 214 is connected with a Battery Management System (BMS) 204 of the battery pack 100. Furthermore, the at least one solenoid valve 214 is made up of a high temperature resistant silicon material.

[00062] The tubing layout 210 is placed around the periphery of the battery pack 100. Further, the tubing layout 210 comprising plurality of openings 302 which is facing towards the plurality of cells 206 of the battery pack 100. Furthermore, the first end of the plurality of cells 206 is placed close to the tubing layout 210. The plurality of openings 302 is configured in such a way that the same can receive the exhaust gasses which are coming out from the one or more cells 206 of the battery pack 100.

[00063] In one of the embodiments of the present application, the tubing layout 210 is placed closer to casing top 102 of the battery pack 100. Accordingly, the exhaust gases can be easily removed to the environment after receiving the same from the one or more cells 206 of the battery pack 100.

[00064] In one of the embodiments of the present application, the tubing layout 210 is running underneath the casing top 102 of the battery back and is equivalent to the shape of the casing top. For example, if the casing top 102 is of square shape, the tubing layout 210 will be also of square shape. Further, the tubing layout 210 also comprises multiple openings 302 which are facing towards the plurality of cells 206 in such a way that every cell of the plurality of cells 206 lies close to one opening of the multiple openings 302.

[00065] In one of the embodiments of the present application, the at least one release valve 202 is placed substantially perpendicularly to the tubing layout 210.

[00066] The degassing system comprises one or more sensors. The one or more sensors are placed around the plurality of cells 206 of the battery pack 100. Furthermore, the one or more sensors are temperature sensor, gas sensors, or combination thereof. In one of the embodiments of the present application, the pressure sensor is used to trigger suction of the exhaust gasses which are coming out from the one or more cells 206 of the battery pack 100. In one of the embodiments of the present application, a threshold limit of the pressure sensor inside the battery pack 100 is 50milibar. In one of the embodiments of the present application, the temperature sensor is used to trigger suction of the exhaust gasses which are coming out from the one or more cells 206 of the battery pack 100. In one of the embodiments of the present application, the gas sensor is used to trigger suction of the exhaust gasses which are coming out from the one or more cells 206 of the battery pack 100.

[00067] In one of the embodiments of the present application, once the internal pressure built up due to battery temperature raise, the one or more sensors is used to trigger suction of the exhaust gasses which are coming out from the one or more cells 206 of the battery pack 100. Since the temperature sensor can be configured to calculate the pressure inside the battery pack 100. Similarly the gas sensor is used to calculate the amount of exhaust gas produced inside the battery pack which is further configured to calculate the pressure inside the battery pack 100.

[00068] The one or more sensors of the degassing system is connected with a Battery Management System (BMS) 204 of the battery pack 100.

[00069] In one of the embodiments of the present application, the one or more sensors 212 are placed closer to a first end of the plurality of cells 206. Further, the first end of the plurality of cells 206 is placed close to the tubing layout 210.

[00070] In one of the embodiments of the present application, one end of the at least one release valve 202 is connected with the at least one solenoid valve 214 and the other end is protruding from a window 106 of a casing of the battery pack 100. The at least one release valve 202 comprising a gate valve. More specifically, the gate valve is placed in the at least one release valve 202 near the other end which is protruding from the window 106 of the casing of the battery pack 100. Accordingly, the same will not allow any water or dirt from the outside environment to the battery pack 100.

[00071] The battery pack 100 comprising plurality of cells 206 and plurality of cell holders 208. The plurality of cell holders 208 also comprising a plurality of conduits which are configured to receive the plurality of cells 206. The battery pack 100 also comprises a casing top 102, a casing bottom 104 and a degassing system. The degassing system comprising at least one solenoid valve 214, a tubing layout 210, one or more sensor 212 and at least one release valve 202. The tubing layout 210 is placed over plurality of cells 206 of the battery pack 100 and the one or more sensor 212 is facing towards the plurality of cells 206 of the battery pack 100. Further, the at least one solenoid valve 214 is connected with the tubing layout 210. Furthermore, wherein when pressure inside the battery pack 100 crosses a threshold limit, the tubing layout 210 activated using the at least one solenoid valve 214 and the tubing layout 210 start sucking released gases coming from the plurality of cells 206 of the battery pack 100 and passes to the at least one release valve 202. The released gasses willed be passed to the outer environment from the at least one release valve 202.

[00072] In one of the embodiments of the present application, one end of the at least one release valve 202 is connected with the at least one solenoid valve 214 and the other end is protruding from the window 106 in the casing top 102 of the battery pack 100. Further, the at least one solenoid valve 214 is connected with the tubing layout 210 and the at least one release valve 202.

[00073] In one of the embodiments of the present application, the at least one solenoid valve 214 is connected with the Battery Management System (BMS) 204 of the battery pack 100. Further, the BMS 204 and the at least one solenoid valve 214 is connected with the casing top 102 of the battery pack 100.

[00074] In one of the embodiments of the present application, the battery pack 100 comprises one or more interconnectors which are placed close to the casing top 102 or/and to the casing bottom 104. Further, one or more cell holders 208 of the battery pack 100 is further divided into two parts that is a cell holder top and a cell holder bottom. The cell holder top is placed opposite to the cell holder bottom and the cell holder top is connected to the cell holder bottom to form a cell holder.

[00075] The one or more layer of Thermal Interface Materials TIM is used to remove the excess heat from battery pack 100 to the surrounding to regulate the temperature of the plurality of cells 206 inside the battery pack 100 and to improve the functionality of the of the plurality of cells 206 which will result in prolong life of the plurality of cells 206 and the battery pack 100.

[00076] The one or more interconnectors within the battery pack 100 are used to connect the plurality of cells 206 electrically. In one of the embodiments of the present application, one or more interconnectors are essential to monitoring efficiency, health and operational systems and communicating that data to the appropriate channels. The one or more interconnectors pass along critical information to other sensors – for example, sensors that detect leaks as well as heat and pressure levels that detect the health of every component of the battery pack. These components also communicate battery operations and safety concerns to the user, giving them confidence in and control over the status of a vehicle or the like.

[00077] The battery pack 100 comprises the plurality of cells 206. The plurality of cells 206 may include a first group of cells and a second group of cells. The plurality of cells 206 is in electrical connection with each other. The plurality of cells 206 cells may be, for example, Lithium-ion Li-ion cells, a nickel hydrogen battery, or the like. Accordingly, the battery pack 100 may be a Li-ion battery pack assembly, a nickel hydrogen battery pack assembly, or the like. The battery pack 100 may include one or more interconnectors to connect the plurality of cells 206. Further, the first group of cells being disposed in the plurality of cell holder at a predefined distance from the second group of cells.

[00078] In the degassing system as shown in figures 1-4, the at least one solenoid valve 214 will be holding by four side tubing layout 210 having plurality of openings 302. Further, one or more sensors 212 are placed around the plurality of cells 206 of the battery pack 100 to detect internal gas detection, temperature near the cells, as well as pressure sensing for its venting function. This will be activated whenever there will be increase in pressure or increase in temperature or increase in exhaust gases. During the activation state, the plurality of openings 302 of the tubing layout 210 gets utilised to collect maximum level of gasses in a vertical direction and releases the same using at least one release valve 202. Accordingly, using this mechanism temperature or pressure or rate of exhaust gases can be maintained inside the battery pack 100. Therefore, the degassing system is capable to achieve thermal management internal pressure management and gas ejection during thermal runaway event as twin role.

[00079] In one of the embodiments of the present application, a high temperature resistant tubing material used for at least one release valve 202 opening function which is incorporated in this system.

[00080] The above-mentioned configuration helps in release of pressure and gas using the degassing system acting as a multipurpose vent during thermal runaway event. The pressure inside the power source unit 100 at high altitude can be adjusted to avoid thermal runaway situation by the degassing system. The same will ensures safety of the user as well as the vehicle in case of the automobile industry.

[00081] Accordingly, the present configuration is able to dissipate large amount of heat in comparison to the solutions available in the art. Further, the present configuration will also reduce the chances of thermal runaway.

[00082] The present subject matter relates to heat transfer from a battery pack. With the implementations of the present subject matter, heat generated by the battery pack can be efficiently dissipated from the battery pack, thereby, the thermal runaway can be eliminated. Accordingly, the plurality of cells thermally efficient and electrically safe.

[00083] In view of the above, the steps as discussed above are not routine, conventional, or well understood in the art, as the claimed steps enable the following solutions to the existing problems in conventional technologies.

[00084] The above-described embodiments, and particularly any “preferred” embodiments, are possible examples of implementations and merely set forth for a clear understanding of the principles of the invention. It will be apparent to those skilled in the art that changes in form, connection, and detail may be made therein without departing from the spirit and scope of the invention.

[00085] Non-limiting and non-exhaustive embodiments of the invention are described with reference to the following figures, wherein like reference numerals refer to like parts throughout the various views unless otherwise specified. It should be appreciated that the following figures may not be drawn to scale.

[00086] The foregoing disclosure is not intended to limit the present disclosure to the precise forms or particular fields of use disclosed. As such, it is contemplated that various alternate embodiments and/or modifications to the present disclosure, whether explicitly described or implied herein, are possible in light of the disclosure. Having thus described embodiments of the present disclosure, a person of ordinary skill in the art will recognize that changes may be made in form and detail without departing from the scope of the present disclosure. Therefore, it is intended that the present invention not be limited to the particular embodiment disclosed, but that the present invention will include all embodiments falling within the scope of the appended claims.

[00087] In the foregoing specification, the disclosure has been described with reference to specific embodiments. However, as one skilled in the art will appreciate, various embodiments disclosed herein can be modified or otherwise implemented in various other ways without departing from scope of the disclosure. Accordingly, this description is to be considered as illustrative and is for the purpose of teaching those skilled in the art the manner of making and using various embodiments of the disclosure. It is to be understood that the forms of disclosure herein shown and described are to be taken as representative embodiments. Equivalent elements, materials, processes or steps may be substituted for those representatively illustrated and described herein. Moreover, certain features of the disclosure may be utilized independently of the use of other features, all as would be apparent to one skilled in the art after having the benefit of this description of the disclosure. Expressions such as “including”, “comprising”, “incorporating”, “consisting of”, “have”, “is” used to describe and claim the present disclosure are intended to be construed in a non-exclusive manner, namely allowing for items, components or elements not explicitly described also to be present. Reference to the singular is also to be construed to relate to the plural.

, Claims:We Claim:

1. A degassing system for a battery pack (100), the degassing system comprising:
at least one solenoid valve (214);
a tubing layout (210), the tubing layout (210) is placed over plurality of cells (206) of the battery pack (100);
one or more sensors (212), the one or more sensors (212) is facing towards the plurality of cells (206) of the battery pack (100); and
at least one release valve (202);
wherein the at least one solenoid valve (214) is connected with the tubing layout (210);
wherein when pressure inside the battery pack (100) crosses a threshold limit, the tubing layout (210) activated using the at least one solenoid valve (214) and the tubing layout (210) start sucking released gases coming from the plurality of cells (206) of the battery pack (100) and passes to the at least one release valve (202).

2. The degassing system as claimed in claim 1, wherein the at least one solenoid valve (214) is connected with the tubing layout (210) and the at least one release valve (202).

3. The degassing system as claimed in claim 1, wherein the tubing layout (210) is placed around the periphery of the battery pack (100) and wherein the tubing layout (210) comprising plurality of openings (302), the plurality of openings (302) is facing towards the plurality of cells (206) of the battery pack (100).

4. The degassing system as claimed in claim 1, wherein the one or more sensors (212) are placed around the plurality of cells (206) of the battery pack (100) and wherein the one or more sensors (212) are temperature sensor, gas sensors, or combination thereof.

5. The degassing system as claimed in claim 4, wherein the one or more sensors (212) are placed closer to a first end of the plurality of cells (206), wherein the first end of the plurality of cells (206) is placed close to the tubing layout (210).

6. The degassing system as claimed in claim 1, wherein the at least one solenoid valve (214) is made up of a high temperature resistant silicon material.

7. The degassing system as claimed in claim 1, wherein the one or more sensor of the degassing system is connected with a Battery management system (BMS) (204) of the battery pack (100).

8. The degassing system as claimed in claim 1, wherein one end of the at least one solenoid valve (214) is connected with a Battery management system (BMS) (204) of the battery pack (100).

9. The degassing system as claimed in claim 1, wherein the at least one release valve (202) is placed substantially perpendicularly to the tubing layout (210).

10. The degassing system as claimed in claim 1, wherein one end of the at least one release valve (202) is connected with the at least one solenoid valve (214) and other end is protruding from a window (106) of a casing of the battery pack (100).

11. The degassing system as claimed in claim 1, wherein the at least one release valve (202) comprising a gate valve.

12. The degassing system as claimed in claim 1, wherein threshold limit of the pressure sensor inside the battery pack (100) is 50milibar.

13. A battery pack (100), the battery pack (100) comprising
plurality of cells (206);
a plurality of cell holders (208), the plurality of cell holders (208) comprising a plurality of conduits, wherein the plurality of conduits configured to receive the plurality of cells (206),
a casing top (102);
a casing bottom (104); and
a degassing system, the degassing system comprising:
at least one solenoid valve (214);
a tubing layout (210), the tubing layout (210) is placed over plurality of cells (206) of the battery pack (100);
one or more sensors (212), the one or more sensors (212) is facing towards the plurality of cells (206) of the battery pack (100); and
at least one release valve (202);
wherein the at least one solenoid valve (214) is connected with the tubing layout (210);
wherein when pressure inside the battery pack (100) crosses a threshold limit, the tubing layout (210) activated using the at least one solenoid valve (214) and the tubing layout (210) start sucking released gases coming from the plurality of cells (206) of the battery pack (100) and passes to the at least one release valve (202).

14. The battery pack (100) as claimed in claim 13, wherein the casing top (102) and the casing bottom (104) are parts of a casing of the battery pack (100),
wherein the casing top (102) and the casing bottom (104) is placed opposite to each other;
wherein the casing top (102) and the casing bottom (104) is connected with each other to form a casing of the battery pack (100); and
wherein the casing is made of a thermally conductive material and an electrically insulating material.

15. The battery pack (100) as claimed in claim 13, wherein the casing top (102) comprising a window (106).

16. The battery pack (100) as claimed in claim 13, wherein one end of the at least one release valve (202) is connected with the at least one solenoid valve (214) and other end is protruding from the window (106) in the casing top (102) of the battery pack (100) and wherein the at least one solenoid valve (214) is connected with the tubing layout (210) and the at least one release valve (202).

17. The battery pack (100) as claimed in claim 13, wherein the at least one release valve (202) is placed substantially perpendicularly to the tubing layout (210).

18. The battery pack (100) as claimed in claim 13, wherein the at least one release valve (202) comprising a gate valve.

19. The battery pack (100) as claimed in claim 13, wherein Battery management system (BMS) (204) of the battery pack (100) is connected with the one or more sensor of the degassing system, wherein the one or more sensors (212) are temperature sensor, sensor, gas sensor or combination thereof.

20. The battery pack (100) as claimed in claim 19, wherein the BMS (204) is present between the casing top (102) and the tubing layout (210).

21. The battery pack (100) as claimed in claim 13, wherein the one or more sensors (212) are placed closer to a first end of the plurality of cells (206), wherein the first end of the plurality of cells is placed close to the tubing layout (210).

22. The battery pack (100) as claimed in claim 13, wherein the tubing layout (210) is placed closer to the casing top (102).

23. The battery pack (100) as claimed in claim 13, wherein the at least one solenoid valve (214) is connected with the Battery management system (BMS) (204) of the battery pack (100) and wherein the BMS (204) and the at least one solenoid valve (214) is connected with the casing top (102) of the battery pack (100).

24. The battery pack (100) as claimed in claim 13, wherein the tubing layout (210) is placed around the periphery of the battery pack (100) and wherein the tubing layout (210) comprising plurality of opening (302), the plurality of openings (302) is facing towards the plurality of cells (206) of the battery pack (100).

25. The battery pack (100) as claimed in claim 13, wherein threshold limit of the pressure sensor inside the battery pack (100) is 50milibar.

26. The battery pack (100) as claimed in claim 13, wherein the battery pack (100) comprises at least one layer of Thermal Interface Material (TIM).

27. The battery pack (100) as claimed in claim 14, wherein the casing comprises a plurality of heat dissipating fins (106), and
wherein the plurality of heat dissipating fins is disposed on an outer surface of the casing top (102) and the casing bottom (104).

28. A vehicle comprising one or more battery pack (100) as claimed in claims 13 to 27 of the present application.