Description:FIELD OF THE INVENTION

[0001] The present invention relates to battery restraining methods and apparatuses and in particular to a double stacked battery holder configured to be soldered over PCB (printed circuit board) to stably hold batteries, preferably coin cells in an adjacent configuration.

BACKGROUND OF THE INVENTION

[0002] Battery powered devices are evolving rapidly due to the constant increase in demand of mobile/portable devices. Such devices are reliable over specific batteries that store and deliver sufficient power to operate devices for longer durations. The type of batteries vary from a button/coin cell to large lithium ion batteries, both types having own merits and demerits. Batteries such as button/coin cell can store a limited extent of energy, especially due to their sizes and considering their sizes, the button and coin cells i.e., CR2032, CR 2450 etc. are available in various sizes that can store and deliver variable measure of energy. While the existing coin cells offer substantial power for the functionality of established devices, still they fall short for numerous applications. One such example is the real-time clock, where their capacity remains insufficient to meet the demands as the existing structural configuration of such circuits restrict integration a single coin cell (considering standard space).

[0003] Generally, for installation of coin cells, manufacturers undertake a comprehensive process that involves steps i.e., identification of soldering points on the PCB where coin cells need to be attached, dual level verification regarding placement of the coin cells (if cells are properly aligned with the soldering tabs or not), application of small amount of flux to the soldering points over the PCB followed by placement of the soldering iron over the points for inducing a heating effect. Lastly, once the soldering point is heated, the solder is applied to create a long lasting electrical connection.

[0004] The above process not only consumes a significant amount of time but also necessitates substantial financial investment due to the need for customized tabs tailored to the specific requirements of the cells. Of greater concern is the soldering process, wherein coin cells are directly affixed onto the PCBs, exposing them to elevated temperatures. This heightened heat poses a risk to the cells' performance and could potentially diminish their shelf life over time. Adding to this, some devices may require higher voltage levels that would not be fulfilled by the existing configuration in which the coin cell is directly soldered over the PCBs. Numerous efforts are underway to address the prevalent drawbacks encountered in existing devices.

[0005] Despite advancements in device development and prior art, effective mechanisms for fulfilling all requirements remain elusive. Existing solutions often fall short in adequately mitigating the identified limitations, underscoring the ongoing need for innovation in this domain. Some of the existing devices/apparatus/methods are as highlighted in the succeeding paragraphs.

[0006] WO2018022110A1 discloses about coin cell battery housing. In one example, a device for housing a coin cell battery includes a receptacle to receive the coin cell battery, a connector to couple the device to an electronic board, and a hinge to couple the receptacle to the connector. The hinge is to allow rotation of the receptacle in a horizontal position and a vertical position, where in the horizontal position, a gap is maintained between the receptacle and the board such that a component can be mounted on the board under the receptacle. Although, WO’110 unveils fabrication of a housing for accommodation of a coin cell battery, however, the mechanism claimed in the document can accommodate a single coin cell and additionally it includes a hinge mechanism for allowing rotation of the housing in between two or more positions, this mechanism increases the possibility of wear and tear in the device, reducing the shelf life.

[0007] Further, US20040106035A1, discloses about a battery holder (1) for receiving a coin cell (6) includes an insulative housing (2) and a first and a second contacts (4, 5) received in the insulative housing. The coin cell includes a positive pole (61) and a negative pole (62) with a smaller diameter than the positive pole thereby forming an annular receiving room (63) around the positive pole. The insulative housing includes a base plate (21), a bulge (22) and a number of chimbs (24) extending upwardly from the base plate and a protrusion (34) at a junction between the base plate and the bulge. The protrusion is mating with the receiving room around the positive pole for preventing the coin cell from reverse insertion. US’035 also provides a similar configuration as is provided in WO’110, therefore, US’035 also involves the same limitation as are encountered in the above referred document. Apart from above technologies including housing for coin cells, there are other configurations as well:

[0008] US9388998B2 discloses about a heating, ventilation, and air conditioning (HVAC) controller may include a housing and a printed circuit board (PCB) situated within the housing. The PCB may include a battery seat region and electrical terminals for electrically connecting a battery to the PCB when the battery is positioned at the battery seat region. The housing may include an opening that may be configured to receive the battery. The battery seat region may be at least partially offset relative to the opening in the housing, but accessible via the opening. The housing may be configured to allow the battery to be inserted into the opening and then moved laterally to the battery seat region, where the battery may be at least partially covered and/or protected by the housing when at the battery seat region. In some cases, the battery may be inserted within the housing without adjusting any part of the housing.

[0009] Having reference to the above disclosed technologies, i.e., it shall be apparent to a person skilled in the art that the existing systems possess some major drawbacks due to which the current requirements are not met. Adding to this, when considering the integration of customized solder tabs or blades into a product assembly process, several factors must be carefully weighed. Firstly, the high cost associated with these customized components necessitates a thorough evaluation of their benefits against the incurred expenses. Additionally, the inclusion of solder tabs can significantly increase packing volume, potentially impacting storage, shipping, and overall product dimensions. Moreover, the customized process required to incorporate these tabs can lead to decreased productivity as it introduces additional steps and complexity into the assembly line. Balancing these considerations is crucial to ensure high scalability and adaptability.

[0010] Therefore, for overcoming the drawbacks/limitations underscored by the prior arts, there arises an essential requirement for an apparatus or method capable of accommodating multiple batteries, such as coin cells, while mitigating the drawbacks/limitations associated with directly soldering these cells onto printed circuit boards (PCBs).

OBJECTS OF THE INVENTION

[0011] The principal object of the present invention is to provide a double stacked battery holder that can easily accommodate two coin cells of different size.

[0012] An object of the present invention is to reduce the space consumed in fabrication/installation of coin cells over printed circuit boards.

[0013] Another object of the present invention is to reduce the number of soldering points during fabrication of the coin cells over PCBs.

[0014] Another object of the present invention is to maintain the efficiency of the batteries (coin cells) by isolating the battery from heightened temperature while carrying out soldering process.

[0015] Another object of the present invention is to provide a double stacked battery holder that eliminates the existing requirements of customized tabs.

[0016] Yet another object of the present invention is to increase the total battery life without increasing the surface area of the PCB dedicated to operatively coupling with such batteries.

[0017] The foregoing and other objects, features, and advantages of the present invention will become readily apparent upon further review of the following detailed description of the preferred embodiment as illustrated in the accompanying drawings.

SUMMARY OF THE INVENTION

[0018] The present invention relates to a dual stacked battery holder designed to securely retain batteries, particularly coin cells, positioned side by side. The holder is configured to be soldered over PCBs and provisions a configuration for stacking at least two coin cells. This configuration aims to maximize space efficiency and ensure stable battery placement.

[0019] According to an embodiment of the present invention, the dual stacked battery holder comprises of a cylindrical shell embodied with multiple recesses, specifically crafted on the inner race of the shell, such recesses act as retainers for supporting the integral components of the holder, a primary positive tab mount, mechanically coupled with one of the recess, a common negative tab mount, engaged with another recess of the shell, having a protrusion that extends within the hollow portion/area of the cylindrical shell, forming a space for housing a first battery, preferably coin cell CR2450, a semicircular aperture crafted at peripheral portion of the shell for insertion of the battery within the space formed in between the primary positive and common negative tab mount, a secondary positive tab mount mechanically engaged with another recess of the shell, which creates a zone in between the secondary positive and common negative tab mount for receiving a second battery, preferably a coin cell, type CR2032, an opening provided at top portion of the shell, through which the second battery is inserted within the zone, a cap attached with the cylindrical shell to cover the opening via interference fit.

[0020] According to another embodiment of the present invention, the method for fabrication of the double stacked battery holder, comprises the steps of, placing the cylindrical shell in an installation section, inserting the primary positive tab mount in one of the recess from upward direction, placing the common negative tab mount in another recess of the shell again from upward direction, inserting the secondary positive tab mount from upward direction in another recess of the shell, positioning a first battery in between primary positive and common negative tab mounts followed by placement of the second battery in between secondary positive and common negative tab mounts, covering the opening of the shell at top portion by a cap.

[0021] While the invention has been described and shown with particular reference to the preferred embodiment, it will be apparent that variations might be possible that would fall within the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

[0022] These and other features, aspects, and advantages of the present invention will become better understood with regard to the following description, appended claims, and accompanying drawings where:
Figure 1 illustrates an exploded view of the double stacked battery holder, with cylindrical shell installed over a PCB (printed circuit board);
Figure 2 (a) illustrates a front magnified view of the cylindrical shell without any of the components;
Figure 2 (b) illustrates a back magnified view of the cylindrical shell without any of the components;
Figure 3 (a) illustrates an exploded view of the holder, highlighting installation of the primary positive tab mount as explained in the embodiment of the present invention;
Figure 3 (b) illustrates another exploded view of the holder, highlighting installation of the first battery (i.e. first coin cell);
Figure 3 (c) illustrates another exploded view of the holder, highlighting installation of the common negative tab mount as per the embodiment of the present invention;
Figure 3 (d) illustrates another exploded view of the holder, highlighting installation of the secondary positive tab mount as per the embodiment of the present invention;
Figure 3 (e) illustrates another exploded view of the holder, highlighting installation of the second battery (i.e. second coin cell);
Figure 3 (f) illustrates another exploded view of the holder, highlighting installation of the cap over the cylindrical shell as per the embodiment of the present invention;
Figure 4 illustrates a process flow for fabrication of the battery stack holder;
Figure 5 (a) illustrates a photographical image of a meter sample in which the holder is embodied, before the vibration test; and
Figure 5 (b) illustrates another photographical image of the holder after the vibration test.

DETAILED DESCRIPTION OF THE INVENTION

[0023] The following description includes the preferred best mode of one embodiment of the present invention. It will be clear from this description of the invention that the invention is not limited to these illustrated embodiments but that the invention also includes a variety of modifications and embodiments thereto. Therefore, the present description should be seen as illustrative and not limiting. While the invention is susceptible to various modifications and alternative constructions, it should be understood, that there is no intention to limit the invention to the specific form disclosed, but, on the contrary, the invention is to cover all modifications, alternative constructions, and equivalents falling within the spirit and scope of the invention as defined in the claims.

[0024] In any embodiment described herein, the open-ended terms "comprising," "comprises,” and the like (which are synonymous with "including," "having” and "characterized by") may be replaced by the respective partially closed phrases "consisting essentially of," consists essentially of," and the like or the respective closed phrases "consisting of," "consists of, the like.

[0025] As used herein, the singular forms “a,” “an,” and “the” designate both the singular and the plural, unless expressly stated to designate the singular only.

[0026] As used herein, the terms “first battery” and “second battery” have been used interchangeably with the terms “coin cells”.

[0027] The present invention relates to a double stacked battery holder, especially developed for holding two coin cells within a single assembly, without increasing the number of negative/positive tab mounts. The present invention provides a holder that is configured to be soldered over a PCB (printed circuit board) to deliver the power to the components fabricated over the PCB, eliminating the specific requirement of direct soldering of the coin cells over the PCBs. The present invention proposes a wide application for different sizes of cells, be it a button cell or a coin cell, or also the cells with sizes in between a button and coin cells.

[0028] Generally, a comprehensive process is used for fabrication of the coin cells over PCBs that not only increases the requirement of more number of tabs but also decreases the efficiency of the coin cells due to high temperature exposure at the time of soldering of such coin cells over the printed circuit boards.
Consequently, numerous technologies have been developed to address these challenges to some extent. Nevertheless, existing solutions have not entirely eliminated these limitations. Therefore, the present invention has been developed to specifically tackle these challenges and introduce a configuration that not only enhances the longevity of such devices but also reduces space requirements to enhance compactness.

[0029] The commonly used coin cells are CR2450 and CR2032. The CR2450 is a larger coin cell battery compared to the CR2032, It typically has a diameter of about 24.5 mm and a thickness of around 5.0mm, having a higher capacity compared to the CR2032. Due to its larger size and higher capacity, the CR2450 is often used in devices such as watches, calculators, medical devices, and small electronic gadgets. Now referring to CR 2032, it has a diameter of about 20.0mm and a thickness of around 3.2 mm which makes it smaller and more adaptable to application areas with lower space capacity.

[0030] Referring to figure 1, an exploded view of the double stack battery holder is illustrated. The battery holder comprises of a cylindrical shell 101, a primary positive tab mount 102, a common negative tab mount 103, a secondary positive tab mount 105, a first battery (coin cell) 104 inserted in between primary positive 102 and common negative 103 tab mount, a second battery (coin cell) 106 inserted in between secondary positive 105 and a common negative 103 tab mount, a cap 107 for covering the cylindrical shell 101 from top portion.

[0031] In Figures 2 (a) & 2 (b), a front and back magnified view of the cylindrical shell 101 is illustrated. The cylindrical shell 101 comprises of a bottom surface 201 that is solderable over a printed circuit board (PCB) 108, nominally with three soldering points. The bottom surface 201 of the shell 101 is crafted with a recess 202, wherein the recess 202 is further crafted with a circular through hole 203, adjacent to which is a T-shaped slot 204 (will be discussed later). The bottom surface 201 is a flat surface which is having surface to surface contact with the printed circuit board 108. The peripheral portion of the shell 101, is crafted in a manner that half/semi-circular portion 209 of the periphery is solid in nature, remaining is a semi-circular aperture 205 (will be discussed later). The portion 209 which is solid in nature includes two recesses 207, 208 acting as retainers (will be discussed later). The cylindrical shell 101 is open from top portion, creating an opening 206 (will be discussed later) over the top portion of the shell 101.

[0032] Again referring to figures 1 and 2 (a), a primary positive tab mount 102 is illustrated. The primary positive tab mount 102 is formed with a concentric type of surface 109 that is layered over the recess 202, aligning with the through hole 203 of the bottom surface 201. The primary positive tab mount 102 is further formed with a protrusion 110 that extends vertically downwards as is shown in figure 1. The protrusion 110 is formed in such a way that it aligns with the T-shaped slot 204 (as discussed above) crafted over the bottom surface 201 of the shell 101. Now referring to figure 3 (a), the primary positive tab mount 102 is in surface to surface contact with the recess 202 of the cylindrical shell 101 in a way that the hole of the primary positive tab mount 102 aligns with the through hole 203 of the cylindrical shell 101 and the protrusion 110 of the primary positive tab mount 102 aligns with the T shaped slot 204.

[0033] Again referring to figures 1 & 2 (b), the illustration clearly depicts the structure of the common negative tab mount 103. The common negative tab mount 103, is formed in an L shaped structure with one protrusion 111 extending in vertical direction and other protrusion 112 extending in horizontal direction. Now referring to figure 3 (b), the protrusion 111 extending in the vertical direction is engaged with one of the recess 207 (as discussed above) of the cylindrical shell 101 and the other protrusion 112 extends horizontally within the hollow area of cylindrical shell 101, creating a space in between the primary positive tab mount 102 layered over the bottom surface 201 of the shell 101 and the common negative tab mount 103.

[0034] Referring to figures 1, 2 (a) & 3 (c), the semi-circular aperture 205 (as discussed above) is crafted at the peripheral portion of the cylindrical shell 101. The semi-circular aperture 205 allows insertion of a first battery 104 within the space created in between the primary positive 102 and common negative 103 tab mount. The first battery 104, in the present invention is a coin cell, preferably CR2450. Post insertion, the positive terminal of the coin cell 104 contacts and forms and electrical connection with the primary positive tab mount 102 while the negative terminal of the coin cell 104 forms contact with the common negative tab mount 103.

[0035] Again referring to figures 1 & 2 (b), a secondary positive tab mount 105 is illustrated. The secondary positive tab mount 105, structurally similar to the negative tab mount 103, includes two protrusions 113, 114, one protrusion 114 extending along the periphery of the shell and other protrusion 113 extending vertically downwards. Now referring to figure 3 (d), the protrusion 113 extending vertically downwards is inserted within one of the recess 208 (as discussed above) of the cylindrical shell 101. The placement of the secondary positive tab mount 105 within the recess 208 creates a zone in between the secondary positive 105 and common negative 103 tab mount.

[0036] Referring to figures 1, 2 (b) & 3 (e), the top portion of the cylindrical shell 101 includes an opening 206 over its top portion/region. The opening 206 allows placement of a second battery 106 within the zone created in between the secondary positive tab mount 105 and the common negative tab mount 103. The second battery 106, is also a coin cell, but cell type is preferably CR2032. The coin cell 106 is inserted in a way that the positive terminal of the coin cell 106 electrically contacts the secondary positive tab mount 105 while the negative terminal of the coin cell 106 contacts the common negative tab mount 103. The second battery/coin cell 106 is inserted from the opening 206 (as discussed above) created over the top portion of the cylindrical shell 101.

[0037] Both the batteries/coin cells 104, 106 are integrated within the cylindrical shell 101 in a way that negative terminals of both the coin cells 104, 106 share a common negative positive mount 103 while the positive terminals of the coin cells 104, 106 include separate/independent positive tab mounts 102, 105, especially named as primary positive tab mount 102 and secondary positive tab mount 105. The inclusion of two batteries 104, 106 within the cylindrical shell 101 increase the total battery life without increasing the surface area of the PCB 108 dedicated to operatively coupling with such batteries 104, 106.

[0038] Referring to Figures 1, 2 (b), 3 (e) and 3 (f), a cap 107 is illustrated. The cap 107 is designed to properly fit over the cylindrical shell 101, covering the opening 206 through which the second battery 106 is inserted. The cap 107 is crafted with one or more grooves 301 that mechanically couple with one or more ridges 302 extended over the surface of the cylindrical shell 101. The coupling of the grooves 301 and ridges 302 is a type of interference fit. Now referring to figure 3 (f), the figure illustrates the connection of the cap 107 over the top portion of the cylindrical shell 101. The Cap serves to enclose and protect the coin cells 104, 106 once they are in place. The final assembly of the battery stack holder is soldered over a PCB (printed circuit board) 108 through minimum three soldering points. The Holder base likely provides structural support and a platform for securing the coin cells 104, 106 in place, while the tab mounts 102, 103, and 105 establish electrical connections with the positive and negative terminals of the coin cells 104, 106.

[0039] Referring to figures, 1, 2a, 2b and 4, a process flow of fabrication/assembly of the double battery stack holder is illustrated. Primarily, the cylindrical shell 101 is placed in an installation/assembly section. In first step (01), the primary positive tab mount 102 is coupled with the recess 202 of the cylindrical shell 101 over the bottom surface 201 by vertically aligning it within the shell 101 from an upward direction. In second step (02), the common negative terminal 103 is mechanically engaged with the recess 207 of the cylindrical shell 101 by positioning it from the upward direction. In third step (03), the secondary positive tab mount 105 is engaged with the recess 208 of the cylindrical shell 101 by vertically aligning it within the recess 208 from upward direction. In fourth step (04), the first battery/coin cell 104 is inserted within the space created in between the primary positive tab mount 102 and common negative tab mount 103 by sliding it from sideways. In fifth step (05), the second battery 106 is inserted within the zone created in between the secondary positive tab mount 105 and common negative tab mount 103 by vertically aligning it through the opening 206 of the cylindrical shell 101 from upward direction. In sixth step (06), the opening 206 over the top portion of the cylindrical shell 101 is covered through a cap 107 by vertically aligning it with the cylindrical shell 101 from upward direction. In seventh step (07), the final assembly of the double battery stack holder is ready. In eighth step (08), the battery stack holder is soldered over the PCB (printed circuit board) 108.

[0040] The double stacked battery holder, claimed in the present invention, provides several technical advantages with respect to the existing arts. The holder reduces the amount of space required for deploying/installing two coin cells 104, 106 over the printed circuit board 108. The holder further isolates the batteries 104, 106 from excessive temperature that is generally encountered while soldering the batteries 104, 106 over the PCB 108. In general, 5-7 soldering points are required for soldering the coin cells 104, 106, which in the present invention is reduced to only three soldering points. This reduction in soldering points not only minimizes the consumption of soldering material but also makes the soldering easy as compared to the existing arts. The present invention also reduces the tab mounts by providing a common tab mount 103 that can be positive tab mount or negative tab mount.

[0041] In an embodiment, the tab mounts 102, 103, 105 employed in the present invention can be changed. In one case, there may be two negative tab mounts (i.e., primary negative tab mount and secondary negative tab mount) with one common positive tab mount as per the requirement. With such case, the placement of the batteries will be changed accordingly to match the terminals of the batteries/coin cells with the polarity of the tab mounts. The tab mounts and cap embodied within the invention can be fixed through screws or fasteners to firmly hold the components in position. Further, the tab mounts 102, 103, 105, in one case, can be embodied with flexible members such as springs to easily accommodate the batteries/coin cells within the space between the tab mounts.

[0042] In another embodiment, the cylindrical shell 101 of the battery stack holder can be made from any electrically non-conductive material capable of securely holding the batteries 104, 106. This could include a range of materials such as plastics or ceramics. The shell 101 can be produced using methods like plastic molding, injection molding, or three-dimensional printing. The materials may be other than plastic and ceramics as per the requirements. In an embodiment, the cap 107 and cylindrical shell 101 may be layered with waterproof material to prevent any malfunctioning or short circuit of the embodied components.

[0043] As per another embodiment of the present invention, a battery capacity sensing means and indicator can be deployed within the cylindrical shell 101 to determine the charge capacity of both the cells 104, 106 and indicate the charge capacity when identified below a threshold value. It should be noted that both the batteries/coin cells 104, 106 embodied within the cylindrical shell 101 are different, i.e. one is CR2450 104 and the other being CR2032 106, so the capacity of both the batteries 104, 106 may be different at a point of time, so in one case, if charge capacity of one of the batteries 104, 106 go below a threshold value, the same may be indicated by the indicator to allow a user to identify which battery 104/106 is to be replaced. Generally, in case the device is not working, people replace both the batteries, however, through this embodiment of the present invention, the specific battery 104/106 being discharged may be indicated by the indicator so that only the completely discharged battery 104/106 is replaced instead of both the batteries 104, 106, optimizing the energy consumption and making the holder economically stable.

[0044] In another embodiment of the present invention, the cylindrical shell 101 may be incorporated with one or more spring loaded buttons adjacent to the first 104 and second 106 batteries. The spring loaded buttons may include a mechanical pusher that may be integrated with a spring and retaining lip. The retaining lip may be mechanically coupled with the buttons. In one case, when the first 104 and second 106 batteries are inserted in between the tab mounts 102, 103 and 105, the spring may be compressed and engaged with the retaining lip, keeping the spring in a compressed state, with stored elastic potential energy. In one case, during extraction of batteries 104, 106 for replacement purposes, the button(s) may be pressed to force the retaining lip to release the spring which may further force the mechanical pusher to push the batteries 104, 106 out from the stacked space, aiding in easy extraction of the batteries 104, 106 from the cylindrical shell 101.

[0045] In an embodiment, the two positive tab mounts embodied in the present invention may be unified to create a single common positive mount along with the common negative tab mount, which may require only two tab mounts for both embodying two coin cells. Further, in one more embodiment of the present invention, with the configuration of the present invention, the number of coin cells can be increased by increasing the tab mounts and size of the cylindrical shell based on the size of the device in which the holder is to be integrated.

[0046] As per another embodiment of the present invention, the double stacked battery holder, may be embodied with one or more retaining members/protrusions that may fixedly hold the batteries once inserted within the space in between the primary positive tab mount-common negative tab mount or secondary positive tab mount-common negative tab mount. Further, in the shown figure, the device is shown cylindrical. However, the invention can also be used for other shapes, including rectangular/quadratic circuit boards. In that case, the holder may take a geometry, which can be embodied over the boards, for example also rectangular or quadratic.

[0047] In one another embodiment of the present invention, the double stacked battery holder may include a safety mechanism, which may comprise of a positive temperature coefficient (PTC) element. When the temperature of a holder is slightly increased beyond a threshold value due to internal short circuit, a connection member coupled to the PTC element may serve to interrupt the flow of charge.

[0048] As per the preferred embodiment of the present invention, the space created by structural installation of common negative tab mount and primary positive mount is of appropriate dimensions with +0.5 mm tolerance considering placement of first battery that is preferably CR 2450 while the zone created by the structural installation of common negative tab mount and secondary positive tab mount is also of appropriate dimensions with +0.5 mm of tolerance considering placement of second battery i.e. CR2302. The dimensions are according to the standard sizes of the batteries, i.e. diameter 24.5 mm and thickness 5 mm for CR2450 battery and diameter 20 mm, thickness 3.2 mm for CR2032. The ratio of diameter of CR2302:CR2450 is 0.816.

[0049] According to an alternative embodiment of the present invention, the holder can be manufactured to accommodate different types of combinations with the same or different ratios. For example, for the same ratio i.e. 0.816, the dimensions can be altered to accommodate a combination of CR 2450 and CR 3032 or CR1632 and CR2032 etc. There may be other possible combinations depending on the power requirement, weight capacity, height, continuous drain etc.

[0050] The present invention is tested under the vibration test and the test results are positive, with no damage in the condition of the holder. The same is highlighted below:
Objective: To evaluate the performance of Meter with respect of Vibration.
Test Date: 29/05/2024
Samples Quantity: 3 nos

Test Summary:-
Test Name Pre Measurement Post Measurement Result
Meter Operation OK Found ok with Reference Voltage Pass
Physical Damage Not found Found ok, No damage on Battery holder & also no breaking of component Pass
Battery Voltage OK OCV found OK, within specified limit Pass
Lock Position Close Close same as pretest condition Pass
Soldering OK OK, No breaking of component found Pass
Contacts OK OK, No breaking of component found Pass

Result- Pass

[0051] Figure 5 (a) & 5 (b), of the present invention, highlights the images of the 3 samples before and after the vibration test. The images represent the condition of the meter samples before and after the vibration test.

[0052] Although the field of the invention has been described herein with limited reference to specific embodiments, this description is not meant to be construed in a limiting sense. Various modifications of the disclosed embodiments, as well as alternate embodiments of the invention, will become apparent to persons skilled in the art upon reference to the description of the invention. , Claims:1) A doubled stacked battery holder, comprising
i) a cylindrical shell 101 crafted with plurality of spaced apart recesses 202, 207, 208 on a surface of said shell 101 that acts as retainers;
ii) a primary positive tab mount 102, screwed in one of said recess 202;
iii) a common negative tab mount 103, mechanically coupled in one of said recess 207, extending within hollow area of said shell 101, to create a space for accommodating a first battery 104, terminals of which form an electrical connection with said primary positive 102 and common negative 103 tab mount, maintaining polarity;
iv) a semicircular aperture 205 formed at peripheral portion of said shell 101 to receive said first battery 104 within said space;
v) a secondary positive tab mount 105, affixed in one of said recess 208, creating a zone for receiving a second battery 106, terminals of which form an electrical connection with said secondary positive 105 and common negative 103 tab mount, maintaining polarity; and
vi) an opening 206 provided at top portion of said shell 101 to receive said second battery 106 within said zone, wherein said opening 206 is covered through a cap 107 via one or more grooves 301 crafted over said cap 107 and ridges 302 crafted over said shell 101.

2) The holder as claimed in claim 1, wherein said cylindrical shell 101 is soldered over a PCB (printed circuit board) 108 to form an electrical connection with said batteries 104, 106.

3) The holder as claimed in claim 1, wherein said first battery 104 is inserted through said aperture 205 from sideways and said second battery 105 is inserted through said opening 206 from top side of said shell 101.

4) The holder as claimed in claim 1, wherein sizes of said first 104 and second 106 battery are different, accommodating diverse power requirements and configurations.

5) The holder as claimed in claim 1, wherein said first 104 and second 106 batteries are selected from but not limited to button cells, coin cells.

6) A method of fabrication of said double stacked battery holder as claimed in claim 1, comprising the steps of:
? placing said cylindrical shell 101 in an installation section;
? inserting said primary positive tab mount 102 in one of said recess 202 from upward direction;
? inserting said common negative tab mount 103 in one of said recess 207 from upward direction, to create a space in between said primary positive 102 and common negative 103 tab mount;
? inserting said secondary positive tab mount 105 from upward direction in another recess 208 of said shell 101, to create a zone in between said secondary positive 105 and common negative 103 tab mount;
? inserting said first battery 104 within said space from said semicircular aperture 205 by sliding it from sideways;
? inserting said second battery 106 within said zone through said opening 206 from upward direction;
? assembling said opening 206 with a cap 107 to cover said shell 101 from top portion; and
? soldering said cylindrical shell 101 over a printed circuit board (PCB) 108.