Enclosure for energy storage unit

Abstract

The present invention relates an enclosure (100) for an energy storage unit. The enclosure (100) includes a holder member (104) and a cover member (110). The cover member (110) is disposed onto the holder member (104). The cover member (104) is provided with a first wall member (112) and a second wall member (114) forming a locking portion (116). The locking portion (116) receives the edge portion (118) of the holder member (114). The enclosure (100) prevents vibrations to the energy storage unit, while also providing water and dust resistance along with decreasing overall cost of manufacturing.

Description

[0001] FIELD OF THE INVENTION

[0002]

[0001] The present invention relates to an enclosure for an energy storage unit for a vehicle.

[0003] BACKGROUND OF THE INVENTION

[0004]

[0002] Generally, vehicles comprise an energy storage unit, for example, but not limited to one or more batteries. Conventional vehicles with an internal combustion engine use the energy storage unit to store fraction of the power generated by the engine to supply to the spark plug for initiating the combustion. Another important function of the energy storage unit remained supplying power to one or more electrical components including a headlamp, a horn, tail lamps and others. Moreover, with the introduction of electric vehicles and hybrid vehicles, the energy storage unit is also being used for powering the transmission of the vehicle. Further, the evolution has led to a greater number of electrical components being powered by the energy storing unit in modern day vehicles. This has led to an increase in load on the energy storage units.

[0005]

[0003] Traditionally, owing to the higher power density, the energy storage unit used by the vehicles for the aforesaid purposes remained Lead-Acid type battery packs. Lead-Acid type battery packs are typically pouch cells which do not need a cell holder or enclosure and may be easy to handle. The Lead-Acid batteries were replaced by lithium-ion batteries to achieve higher power density and longer life cycle. Along with this the heavier weight of Lead-Acid batteries was another reason for the replacement. Energy storage unit such as lithium- ion batteries exposed to shocks and vibrations can have alteration in electrical performance as well as mechanical properties.

[0006]

[0004] Presently available enclosures for energy storage unit are focused on merely accommodating the battery. The presently available enclosures are neither configured to absorb vibrations nor do they have any secure holding mechanism for the energy storage unit. Further, the enclosures for energy storage units do not have adequate water and dust resistance which may lead to catastrophic failure of the energy storage unit. Furthermore, the inclusion of gaskets or rubber sealants increase the overall cost of the enclosures.

[0007]

[0005] In view of the above, there is a need for an enclosure for energy storage unit which addresses one or more limitations stated above.

[0008] SUMMARY OF THE INVENTION

[0009]

[0006] In one aspect, the present disclosure relates to an enclosure for an energy storage unit. The enclosure comprises a holder member. The holder member comprises a base member and a plurality of walls. The plurality of walls extends vertically from the base member. The holder member comprises an opening which is formed at an edge portion of the plurality of walls. The opening is configured to receive the energy storage unit and the base member is configured to support the energy storage unit. The enclosure further comprises a cover member. The cover member is disposed onto the opening of the holder member. The cover member comprises an inner surface, an outer surface opposite the inner surface, a first wall member extending vertically downwards from an outer periphery of the outer surface, and a second wall member extending vertically downwards from an inner periphery of the inner surface of the cover member.

[0010]

[0007] In an embodiment, the second wall member is disposed at a predefined distance from the first wall member forming a locking portion, such that the locking portion is configured to receive the edge portion of the plurality of walls of the holder member.

[0011]

[0008] In a further embodiment, the first wall member is shorter than the second wall member such that the first wall member rests on the pre-defined abutment on the outer side of the plurality of walls of the holder member. A part of the second wall member rests on the a pre-defined abutment on the inner side of the plurality of walls of the holder member and the remaining part of the second wall member rests on the energy storing unit for arresting the respective movements of the cover member and the energy storage unit along z-axis.

[0012]

[0009] In a further embodiment, the holder member comprises one or more grooves at the edge portion of the holder member and the cover member comprises one or more notches at the first wall member of the cover member for snap fitting the cover member to the grooves of the holder member.

[0013]

[0010] In a further embodiment, the holder member comprises one or more guiding rails on the inner surface of one or more walls of the plurality of walls of the holder member. The one or more guiding rails are configured to engage with a guiding rail of a holder of the energy storage unit.

[0014]

[0011] In a further embodiment, the holder member comprises one or more locators on an interior surface of the base member. The one or more locators are configured to engage with a protrusion on the energy storage unit.

[0015]

[0012] In a further embodiment, the inner surface of plurality of walls comprises one or more ribs and the holder member comprises an inclined orientation.

[0016]

[0013] In a further embodiment, the enclosure comprises a recess in the cover member for accommodating one or more components including the electronic board, wires, fusing elements, BMS of the energy storage unit. The wires extending from the electronic board are prevented from excessive bending stress and secured connected using screws.

[0017]

[0014] In a further embodiment, the locking portion is filled with an adhesive or sealant, the adhesive / sealant is provided in a horizontal direction and stops at an abutting surface between the cover member and the holder member.

[0018]

[0015] In a further embodiment, the cover member comprises a first connecting part for connecting a conductive element with wires extending from the electronic board and a second connecting part for connecting a conductive element with wires extending external to the one or more energy storage units.

[0019] BRIEF DESCRIPTION OF THE DRAWINGS

[0020]

[0016] Reference will be made to embodiments of the invention, examples of which may be illustrated in accompanying figures. These figures are intended to be illustrative, not limiting. Although the invention is generally described in context of these embodiments, it should be understood that it is not intended to limit the scope of the invention to these particular embodiments.

[0021] Figure 1 is an exploded view of an enclosure in accordance with an embodiment of the present invention.

[0022] Figure 2 is a side view of the enclosure shown in Figure 1 , in accordance with an embodiment of the present invention.

[0023] Figure 3 is a front view of the enclosure shown in Figure 1 , in accordance with an embodiment of the present invention.

[0024] Figure 4 is an exploded view of the enclosure depicting a first wall member, the second wall member and a locking portion in an enlarged view, in accordance with an embodiment of the present invention.

[0025] Figure 5 is a top view of a holder member of the enclosure, depicting guiding rails in an enlarged view, in accordance with an embodiment of the present invention. Figure 6 is a side view of the holder member shown in Figure 5, in accordance with an embodiment of the present invention.

[0026] Figure 7 is a front view of the holder member shown in Figure 5, in accordance with an embodiment of the present invention.

[0027] Figure 8 is a top view of a cover member of the enclosure shown in Figures 1 - 4, in accordance with an embodiment of the present invention.

[0028] Figure 9 is a side view of the cover member shown in Figure 8, in accordance with an embodiment of the present invention.

[0029] Figure 10 is a sectional view of the enclosure shown in Figure 1 , in accordance with an embodiment of the present invention.

[0030] DETAILED DESCRIPTION OF THE INVENTION

[0031]

[0017] Various features and embodiments of the present invention here will be discernible from the following further description thereof, set out hereunder.

[0032]

[0018] For the purpose of the present invention, the term “vehicle” relates to a saddle type vehicle provided with an enclosure for an energy storage unit. Further, a longitudinal axis of the vehicle refers to an axis along a length of the vehicle, a lateral axis of the vehicle refers to an axis along a width of the vehicle and a vertical axis of the vehicle refers to an axis along the height of the vehicle.

[0019] Figure 1 illustrates an exploded view of an enclosure 100 for an energy storage unit (not shown) of a vehicle (not shown), in accordance with an embodiment of the present invention. In some embodiments, the enclosure 100 may be positioned at a substantial central portion of the vehicle. However, it should not be meant to limit the scope of the present invention. The enclosure 100 may be positioned and placed at any other location on the vehicle as per design and user requirements. In some embodiments, the enclosure 100 may be connected to a frame member (not shown) of the vehicle through one or more fasteners or any other fabrication mechanism like plastic welding or rivets.

[0033]

[0020] In some embodiments, the enclosure 100 is used in the vehicle such as, but not limited to, a two-wheeled vehicle. However, it should be understood that the enclosure 100 as illustrated may also find its application in other kinds of vehicle like, a three wheeled vehicle, or a four wheeled vehicle, or other multi-wheeled vehicles, or any non-automotive application which may use the enclosure 100 for accommodating the one or more energy storage units. Further, the application of the enclosure 100 of the present invention may be found in vehicles, such as, but not limited to, internal combustion engine vehicles, electric vehicles, and hybrid vehicles. In some embodiments, the enclosure 100 in the present invention may also find its applications apart from the vehicles like any machine driven or operated by the energy of the energy storage units. The terms “energy storage unit” and “battery pack” may be interchangeably used in the present disclosure. The term “battery pack” may be used often for brevity. In some other embodiments, the battery pack may comprise a plurality of energy storage modules (not shown). In some embodiments, each energy storage module may further include a plurality of cells (not shown), which may be made of, but not limited to, Lithium-ions. In some embodiments, the plurality of cells may be charged through an external AC source and / or through a regenerative braking system (not shown) via one or more converters in the vehicle. It may be contemplated that the plurality of cells may not be limited to only Lithium-ions. The cells may be made of any other material known in art. Thus, the scope of application of the present invention may not be limited to the enclosure for storing battery modules having the Lithium-ions. In some exemplary embodiment, the energy storage unit can be a 12-volt Lithium-ion battery.

[0034]

[0021] In some embodiments, the enclosure 100 can be made of material, including, but not limited to, a plastic material like a polycarbonate-13 and a metallic material like an aluminum alloy, iron, and stainless steel.

[0035]

[0022] In some embodiments, the plurality of cells is adapted to be held at one or more receptacles 102C provided in the one or more cell holder 102A. In the illustrated embodiment of Figure 1 , the enclosure 100 comprises two cell holders 102A. However, the illustrated embodiment of two cell holders should not be meant to limit the scope of the present invention. The battery pack or the battery module may include more than two cell holders 102A. The cell holders 102A may be configured with one or more guiding rails 102B. In the illustrated Figure 1 , each cell holder 102A comprises two guiding rails 102B at its extreme edges. The guiding rails 102B are protruding members and are extending along a depth of the enclosure 100. That is to say, the guiding rails 102B extends in a vertical direction.

[0036]

[0023] In some embodiments, the guiding rails 124 have a construction comprising two protruding elements extending vertically on the plurality of walls 108. The two protruding elements may have a hollow channel between them. An outer surface of the energy storage units is designed respectively to have a protrusion that can be engaged within the hollow channel of the guiding rails 124.

[0037]

[0024] In an embodiment, the enclosure 100 comprises a holder member 104. The holder member 104 comprises one or more guiding rails 124 (shown in Figure 5) on an inner surface of one or more walls of the plurality of walls 108 of the holder member 104. The one or more guiding rails 124 are configured to engage with the guiding rail 102B of the cell holder 102A of the energy storage unit.

[0038]

[0025] Figures 2 and 3 illustrate a side view and a front view of the enclosure 100 shown in Figure 1 , in accordance with an embodiment of the present invention. The enclosure 100 comprises the holder member 104 which is covered by a cover member 110. In some embodiments, the holder member 104 and the cover member 110 can be secured together by methods such as fasteners, rivets or plastic welding.

[0039]

[0026] Referring again to Figures 1 - 3 in conjunction with Figures 4 and 5, the holder member 104 is adapted to accommodate one or more elements, including, but not limited to, the one or more energy storage units (not shown). As illustrated, the holder member 104 comprises a base member 106 (more clearly shown in Figure 5) and a plurality of walls 108 (shown in Figure 1 ) extending from the base member 106. The holder member 104 further comprises an opening 102 (shown in Figure 4, which is formed at an edge portion 118 (shown in Figures 1 and 10) of the plurality of walls 108. The opening 102 of the holder member 104 is configured to receive the one or more energy storage units inside the holder member 104. In an embodiment, after receiving the one or more energy storage units, the base member 106 of the holder member 104 is configured to support the one or more energy storage units. Thus, the base member 106 acts as a structural support for holding or carrying the one or more battery packs. In some embodiments, the holder member 104 is in a cuboidal shape. However, it should be understood that the holder member 104 may be in any other shape apart from the cuboidal shape.

[0027] In an embodiment, the holder member 104 comprises one or more grooves 120 (shown in Figures 1 , 3, 4, 6 and 7) at the edge portion 1 18 of the holder member 104. The grooves 120 as shown are nothing but elongated or oblong shaped grooves. In an embodiment, the cover member 110 of the enclosure 100 comprises one or more notches 122 (shown in Figure 4) at the first wall member 112 of the cover member 110. In some embodiments, the one or more notches 122 are protruding structures which can fit or snap into the grooves 120 made on the holder member. Thus, the one or more notches 1 12 of the cover member 100 is used for snap fitting the cover member 1 10 to the grooves 120 of the holder member 104.

[0040]

[0028] In an embodiment as shown in Figures 3 and 5, the holder member 104 comprises one or more locators 126 on an interior surface 106A of the base member 106. The one or more locators 126 are configured to engage with a protrusion (not shown) on the energy storage units. In some embodiments, the one or more locators 126 are cylindrical protrusion members. In other words, the locators 126 are circular protruding elements on the base member 106 when viewed from a top and they are located within the holder member 104. The locators 126 are adapted to accommodate the respective protruding elements such as locator pins (not shown) on an outer surface of the energy storage unit. The locator pins can be accommodated inside the locators 126 to affix the position of the energy storage units on the base member 106 within the holder member 104. Thus, the energy storage units disposed inside the holder member 104 is properly mounted inside the holder member 104 through the one or more locators 126.

[0029] In an embodiment, the guiding rails 124 and locators 126 arrest movement of the energy storage unit horizontally along x-axis or y-axis.

[0041]

[0030] In an embodiment, the plurality of walls 108 of the holder member 104 comprises one or more of ribs 128. In the illustrated embodiments, an inner surface of plurality of walls 108 comprises one or more ribs 128 (shown in Figures 1 , 2, 3, 5 - 7). The ribs 128 are a vertical depression on each wall of the plurality of walls 108 when seen from outside of the holder member 104. The ribs 128 are tapered towards the edge portion 118 of the plurality of walls 108 starting from the base member 106. The ribs 128 prevent uneven surfaces during a moulding process of the holder member 104. Further, corners of the holder member 104 may contain chamfers 130 to relieve sharp edges and prevent the customer from any injury from the sharp edges. In an embodiment of the present invention the ribs 128 are approximately of length 100 mm and breadth 22 mm.

[0042]

[0031] Further, the holder member 104 comprises an inclined orientation. The inclined orientation of the holder member 104 may provide an aesthetic appeal as well as ease in manufacturing plastic parts for easy ingress and removal of tools during molding process of the holder member 104. That is to say, the plurality of walls 108 extend outwardly towards the edges from the base member 106. The inclined orientation facilitates manufacturability of the plastic part for easy ingress and removal of the tool during the moulding process of the holder member 104. Moreover, the inclined orientation also serves aesthetic purposes. In some embodiments, an inclination angle of the holder member 104 can be within the range of 0.5 degree to 1 degree.

[0043]

[0032] Figures 8 and 9 illustrate a top and side views of the cover member 110, respectively, in accordance with an embodiment of the present invention. In an embodiment, the cover member 110 is disposed onto the opening of the holder member 104. The cover member 110 comprises an inner surface 110A and an outer surface 110B opposite the inner surface 110A. The cover member 110 further comprises a first wall member 1 12 extending vertically downwards from an outer periphery of the outer surface 110B. The cover member 110 further comprises a second wall member 114 extending vertically downwards from an inner periphery of the inner surface 110A of the cover member 110.

[0044]

[0033] In an embodiment, the first wall member 112 of the cover member 110 is shorter than the second wall member 114 of the cover member 110 such that the first wall member 112 rests on the pre-defined abutment on the outer side of the plurality of walls 108 of the holder member 104. A part of the second wall member 114 rests on a pre-defined abutment on the inner side of the plurality of walls 108 of the holder member 104 and the remaining part of the second wall member 114 rests on the energy storing unit for arresting the respective movements of the cover member 110 and the energy storage unit along a z-axis.

[0034] In an embodiment as shown in Figure 10, the second wall member 114 is disposed at a predefined distance from the first wall member 112 forming a locking portion 116. The locking portion 116 is configured to receive the edge portion 1 18 of the plurality of walls 108 of the holder member 104. In other words, the first wall member 112 and the second wall member 114 are disposed at the predefined distance from each other. The predefined distance between the first wall member 112 and the second wall member 114 is adapted to accommodate the edge portion 1 18 of the plurality of walls 108 of the holder member 104 and is known as the locking portion 116.

[0045]

[0035] In some embodiments, height of the first wall member 112 can be 6 mm. Further, a height of the second wall member 114 can be 18 mm. Furthermore, a gap or the predefined distance between the first wall member 112 and the second wall member 114 can be 0.2 mm. In some embodiments, the gap is adapted to accommodate the edge portion 118 of the holder member 104 via the snap fitting.

[0046]

[0036] In an embodiment, the locking portion 116 is filled with an adhesive or sealant, the adhesive / sealant is provided in a horizontal direction and stops at an abutting surface between the cover member 110 and the holder member 104. In other words, a sealant is disposed in the gap to affix the holder member 104 and the cover member 110 to provide water and dust resistance. The sealant is provided in a horizontal direction and stops at an abutting surface between the cover member 110 and the holder member 104. The disposition of the sealant provides water and dust resistance as per industry standards.

[0047]

[0037] In some embodiments, a clearance or the gap between the cover member 110 and the holder member 104 permits application of 0.5 mm sealant. In an embodiment of the present invention, the rating for water and dust can be IP67 rating. In another embodiment, a resin can be disposed in the gap between the first wall member 112 and the second wall member 1 14. The resin can be a liquid sealant or a rubber gasket to prevent any air gap which may pave way for impurities such as dust, water, or ingress.

[0048]

[0038] The cover member 110 comprises a first connecting part 110C for connecting a conductive element with the wires extending from the electronic board 134 and a second connecting part 110D for connecting a conductive element with the wires extending external to the one or more energy storage units. Further referring to Figure 10, a recess 132 is provided in the cover member 110. The recess 132 is provided for accommodating one or more components including the electronic board 134, the wires, fusing elements, BMS of the energy storage unit 134. In some embodiments, the wires extended from the electronic board 134 are prevented from excessive bending stress and secured connected using screws (not shown).

[0049]

[0039] In some embodiments, the recess 132 is included to securely accommodate the one or more components without encountering space related issues such as bending of wires and damage to components amongst others. In some further embodiments, a height of the recess 132 to accommodate one or more components of the electronic board 134, the wires, the fusing elements, the BMS can be 15 mm. This space is utilized to prevent aforementioned space related issues such as bending of wires and damage of components amongst others. The recess 132 ensures that the terminals extending from the BMS being connected external to the battery pack are not subjected to excessive bending stresses which may lead to wear and tear of the wires. The recess 132 design carefully addresses the bending in wire terminals. Further, any accidental wire disconnection is also avoided. Furthermore, the wires extending from the BMS are first connected via screws at respective locations.

[0050]

[0040] In an embodiment of the present invention the BMS is provided with the energy storage unit to monitor the operation of cells in the module, providing protection, estimating the operational state, continually optimizing performance, and reporting operational status to external devices.

[0051]

[0041] Additionally, according to an embodiment of the present invention, the BMS has a provision of a TFT display over the casing recess (132) for displaying the cell module parameters such as, BMS temperature, state of charge indicators, interconnector temperature, maximum temperature and energy storage unit diagnostics.

[0042] Advantageously, the enclosure for the energy storage unit provides a secure disposition of the battery packs inside the enclosure ensuring better durability of the battery packs against any impact and / or vibrational loads. The enclosure arrests the vertical as well as horizontal movements of the battery packs along all three x, y and z axes. Further, the provision of sealant and the holder member and the cover member provides ease of assembly against known arts. The design of the cover member ensures prevention of the energy storage unit from ingress of water, moisture and dust particles ensuring better performance and reducing serviceability and maintenance issues.

[0052]

[0043] The present invention provides secure locking of the energy storage units by a provision of snap fitting configuration between the holder member and the cover member. This in turn improves easy handling of the energy storage unit. The cover member in the present invention is adapted to accommodate the BMS and ensure minimum bends in terminals connecting the BMS to external of the energy storage unit.

[0053]

[0044] The enclosure for the energy storage unit provides a secure disposition of an energy storage unit inside the enclosure ensuring better durability of the battery pack against any impact or vibrational loads. Further, the enclosure arrests the vertical as well as horizontal movement of the energy storage. Furthermore, the provision of sealant and method of assembly of the holder member and the cover member provides ease of assembly against known arts. The design of the cover member also ensures prevention of the energy storage unit from ingress of water, moisture and dust particles ensuring better performance and reducing serviceability and maintenance issues.

[0054]

[0045] The enclosure includes a holder member and a cover member. The enclosure is adapted to accommodate an energy storage unit wherein the cover member is snap fitted with the holder member to accommodate the energy storage unit.

[0055]

[0046] The holder member comprises a base member and a plurality of walls extending from the base member adapted to accommodate an energy storage unit. The holder member further comprises of guiding rails and locators to arrest the horizontal movement of the energy storage unit along the x and y axes.

[0056]

[0047] A cover member is secured over the holder member to form an enclosure for the energy storage unit. The cover member is snap fitted to the holder member to secure the energy storage unit within the enclosure. The enclosure further contains a first wall member and a second wall member wherein the second wall member rests on the energy storage unit while the cover member is snap fitted to the holder member securing the vertical movement of the energy storage unit along the z axis.

[0057]

[0048] The cover member includes a recess. The recess is adapted to accommodate a Battery Management System (BMS) for the monitoring of the energy storage unit. The recess is also adapted to accommodate components such as electronic board, wires and fusing elements.

[0058]

[0049] Moreover, a sealant preferably a liquid sealant is used while affixing the holder member to the cover member. The snap fitting and sealant applied to the enclosure makes the enclosure water and dust resistant as per the industry standards.

[0059]

[0050] The cover member is adapted to accommodate a conductive element with wires extending from the electronic board. The second connecting part is adapted to accommodate a conductive element with wires extending external to the energy storage unit.

[0060]

[0051] The holder member comprises a defined abutment on an outer surface of the plurality of walls of the holder member. The abutment is adapted to accommodate a respective structural element of the cover member. The holder member contains structural elements including guiding rails and locators to securely accommodate the energy storage unit at a predefined position.

[0061]

[0052] The first wall member is shorter than the second wall member. Further the first wall member rests on the defined abutment on the outer surface of the plurality of walls of the holder member providing secure closure of the enclosure. Furthermore, the cover member has one or more grooves on the outer surface of the plurality of walls of the holder member between the defined abutment and the edge portion of the holder member. Corresponding to the grooves, the cover member contains a plurality of notches on the inner surface of the first wall member. The grooves and the corresponding notches are snap fitted together upon the placement of the cover member over the holder member to secure the cover member and the holder member together.

[0062]

[0053] Snap fitting assembly is provided such that two notch-mating groove assembly is provided along each longer edge portion and one notch-mating groove assembly along the width / shorter edge portion.

[0063]

[0054] Furthermore, the second wall member is accommodated within the holder member such that a part of the second wall member rests on a predefined abutment on the inner side of the plurality of wall of the holder member. The remaining part of the second wall member rests on the energy storage unit. The second wall member partially resting on the energy storage unit arrests the vertical movement or movement along the z-axis of the energy storage unit.

[0064]

[0055] While the present invention has been described with respect to certain embodiments, it will be apparent to those skilled in the art that various changes and modification may be made without departing from the scope of the invention as defined in the following claims.

[0065] List of reference numerals

[0066] 100 - Enclosure 102- Opening

[0067] 102A - Cell holder

[0068] 102B - Guiding rail

[0069] 102C - Receptacle

[0070] 104- Holder member

[0071] 106- Base member

[0072] 108- Plurality of walls

[0073] 110- Cover member

[0074] 110A - Inner surface

[0075] 110B - Outer surface

[0076] 110C - First connecting part

[0077] 110D - Second connecting part

[0078] 112- First wall member

[0079] 114- Second wall member

[0080] 116- Locking portion

[0081] 118- Edge portion

[0082] 120- Grooves

[0083] 122- Notches

[0084] 124- Guiding rails

[0085] 126 - Locators

[0086] 128- Ribs 130 - Chamfers

[0087] 132 - Recess

[0088] 134 - Electronic board

Claims

WE CLAIM:

1. An enclosure (100) for an energy storage unit, the enclosure (100) comprising: a holder member (104) comprising a base member (106) and a plurality of walls (108), the plurality of walls (108) extending vertically from the base member (106), and an opening being formed at an edge portion (118) of the plurality of walls (108), the opening being configured to receive the energy storage unit and the base member (106) being configured to support the energy storage unit, a cover member (110) being disposed onto the opening of the holder member (104), the cover member (110) comprising: an inner surface (110A), an outer surface (110B) opposite the inner surface (110A), a first wall member (112) extending vertically downwards from an outer periphery of the outer surface (110B), a second wall member (114) extending vertically downwards from an inner periphery of the inner surface (110A) of the cover member (110).

2. The enclosure (100) as claimed in claim 1 , wherein the second wall member being disposed at a predefined distance from the first wallmember (112) forming a locking portion (116), such that the locking portion (116) being configured to receive the edge portion (118) of the plurality of walls (108) of the holder member (104).

3. The enclosure (100) as claimed in claim 1 , wherein the first wall member (112) being shorter than the second wall member (114) such that the first wall member (112) rests on the pre-defined abutment on the outer side of the plurality of walls (108) of the holder member (104), a part of the second wall member (114) rests on the a pre-defined abutment on the inner side of the plurality of walls (108) of the holder member (104) and the remaining part of the second wall member (114) rests on the energy storing unit for arresting the respective movements of the cover member (110) and the energy storage unit along the z-axis.

4. The enclosure (100) as claimed in claim 1 , wherein the holder member (104) comprises one or more grooves (120) at the edge portion (118) of the holder member (104) and the cover member (110) comprises one or more notches (122) at the first wall member (112) of the cover member (110) for snap fitting the cover member (110) to the grooves (120) of the holder member (104).

5. The enclosure (100) as claimed in claim 1 , wherein the holder member (104) comprises one or more guiding rails (124) on the inner surface of one or more walls of the plurality of walls (108) of the holder member (104), the one or more guiding rails (124) being configured to engage with a guiding rail (102B) of a cell holder (102A) of the energy storage unit.

6. The enclosure (100) as claimed in claim 1 , wherein the holder member (104) comprises one or more locators (126) on an interior surface (106A) of the base member (106), the one or more locators (126) being configured to engage with a protrusion on the energy storage unit.

7. The enclosure (100) as claimed in claim 1 , wherein the inner surface of plurality of walls (108) comprises one or more ribs (128) and the holder member (104) comprises an inclined orientation.

8. The enclosure (100) as claimed in claim 1 , comprising a recess (132) in the cover member (110) for accommodating one or more components including the electronic board, wires, fusing elements, BMS of the energy storage unit (134), wherein wires extending from the electronicboard (134) are prevented from excessive bending stress and secured connected using screws.

9. The enclosure (100) as claimed in claim 1 , wherein the locking portion(116) being filled with an adhesive or sealant, the adhesive / sealant is provided in a horizontal direction and stops at an abutting surface between the cover member (110) and the holder member (104).

10. The enclosure (100) as claimed in claim 1 , wherein the cover member(110) comprises a first connecting part (110C) for connecting a conductive element with wires extending from the electronic board (134) and a second connecting part (110D) for connecting a conductive element with wires extending external to the one or more energy storage units.

Images