[0001] The present invention relates to energy storage systems and, more
particularly, to a battery unit.
5 BACKGROUND
[0002] Rechargeable batteries are of growing significance in various fields and
applications where electrical power is required. Over the years, the rechargable
batteries have undergone various developments and evolutions, to make them more
effective, and efficient. Right from electric vehicles, to household applications,
10 rechargable batteries are found all around us. When used in an automotive application,
the rechargable batteries are typically carried by the frame of the vehicle. Further, the
rechargable batteries are electrically coupled to a rotating electrical machine, e.g. a
motor that provides requisite traction power to the ground engaging members, e.g. the
wheels.
15 [0003] Generally, the rechargable batteries are contained within a casing
composed of a sturdy, often a sturdy non-conducting material. As such, the casing
containing the rechargable batteries is connected to the frame of the vehicle.
Therefore, the casing contains provisions for mounting thereof on the frame, thereby
enabling frame to carry the rechagable batteries. In addition, the casing also includes
20 provisions to facilitate electrical connections of the battery to the motor, and
provisions facilitating circulation of cooling air therethrough. Moreover, the size of
the rechargable battery or rechargable batteries, also depends upon the size and design
of casing, and vice versa.
[0004] Owing to such crucial requirements from the casing, the designing of
25 casing remains an importance aspect. However, there are various manufacturing
related constraints in designing the casing. For example, in various conventional
~ 3 ~
manufacturing processes, it is required that a necessary predetermined draft angle be
provided, which often results in underutilization of space within the casing.
Furthermore, since the rechargable battery or rechargable batteries are required to be
placed inside the casing, the casing is required to be designed such that placement and
5 removal of the rechargable battery or rechargable batteries in the casing, for
replacement, maintenance or repair purposes, remains easy, quick and less
cumbersome, while also ensuring that misalignment or misplacement of the
rechargable batteries in the casing is substantially precluded.
10 SUMMARY
[0005] This Summary is provided to introduce a selection of concepts in a
simplified form that are further described below in the Detailed Description. This
Summary is not intended to identify key or essential features of the claimed subject
matter, nor is it intended to be used as an aid in determining the scope of the claimed
15 subject matter.
[0006] In one aspect of the present invention, an energy storage system is
provided. The energy storage unit comprising: a plurality of energy storage members
; and a casing unit adapted to accommodate each of the plurality of energy storage
members, the casing unit comprises, a first side cover comprising a first cover first
20 wall, at least one first cover second wall extending from the first cover first wall at a
predetermined angle with respect to the first cover first wall, and a first bottom wall ;
and a second side cover comprising a second cover first wall, and at least one second
cover second wall extending from the second cover first wall at a predetermined angle
with respect to the second cover first wall, and a second bottom surface, wherein the
25 first side cover and the second side cover are adapted to be joined together to form the
casing unit having the first cover first wall, at least one first cover second wall, the
first bottom wall ; the second cover first wall, at least one second cover second wall,
the second bottom surface and a top opening. The plurality of energy storage members
~ 4 ~
are adapted to be stored in the casing unit formed by the first side cover and the second
side cover.
[0007] The plurality of energy storage members include a first battery pack, and
a second battery pack, wherein the first battery pack includes the first upstanding wall,
5 the second upstanding wall, a third upstanding wall, and a fourth upstanding wall, and
wherein the second battery pack includes a fifth upstanding wall, a sixth upstanding
wall, a seventh upstanding wall, and an eighth upstanding wall.
[0008] The energy storage unit further comprising; the first side cover is adapted
to be joined with the second side cover along a joining edge to form the casing unit,
10 wherein the first upstanding wall and the fifth upstanding wall are at an angle with
respect to the joining edge.
[0009] The first upstanding wall and the fifth upstanding wall are perpendicular
with respect to the joining edge.
[00010] The second upstanding wall and the third upstanding wall of the first
15 battery pack extend between the first upstanding wall and the fourth upstanding wall
of the first battery pack, at an inclination, and wherein the sixth upstanding wall and
the seventh upstanding wall of the second battery pack extend between fifth
upstanding wall and the eighth upstanding wall of the second battery pack, at an
inclination.
20 [00011] The first side cover of the casing unit further includes the first bottom
surface, wherein the first cover first wall, at least one first cover second wall extends
upwardly at a right angle from the first bottom surface.
[00012] The second side cover of the casing unit further includes the second
bottom surface, wherein the second cover first wall and the second cover second wall
25 extends upwardly at a right angle from the second bottom surface.
[00013] The at least one first cover second wall includes a right first cover second
wall, and a left first cover second wall, wherein each of the right first cover second
~ 5 ~
wall, and the left first cover second wall are positioned at an inclination, wherein the
inclination defines a draft angle on the first side cover, and wherein the at least one
second cover second wall includes a right second cover second wall, and a left second
cover second wall, wherein each of the right second cover second wall, and the left
5 second cover second wall are positioned at an inclination with respect to the horizontal
plane, wherein the inclination defines a draft angle on the second side cover .
[00014] The first battery pack is positioned in the casing unit such that the first
upstanding wall and the fourth upstanding wall of the first battery pack is
perpendicular to the joining edge, whereby the first battery pack is positioned in the
10 casing unit such that a weight of the first battery pack is shared by each of the first
side cover and the second side cover.
[00015] The second battery pack is positioned in the casing unit such that the first
upstanding wall and the fourth upstanding wall of the second battery pack is
perpendicular to the joining edge, whereby the second battery pack is positioned in
15 the casing unit such that a weight of the second battery pack is shared by each of the
first side cover and the second side cover.
[00016] The first side cover is formed by a molding process, wherein the mold
ejection direction is normal to the first cover first wall
[00017] The second side cover is formed by a molding process, wherein the mold
20 ejection direction is normal to the second cover first wall.
[00018]
BRIEF DESCRIPTION OF DRAWINGS
[00019] The invention itself, together with further features and attended
25 advantages, will become apparent from consideration of the following detailed
description, taken in conjunction with the accompanying drawings. One or more
~ 6 ~
embodiments of the present invention are now described, by way of example only
wherein like reference numerals represent like elements and in which:
[00020] Figure 1 illustrates a perspective view of an energy storage unit,
according to an embodiment of the present invention;
5 [00021] Figure 2 illustrates another perspective view of the energy storage unit
of Figure 1, according to an embodiment of the present invention;
[00022] Figure 3 illustrates an exploded view of the energy storage unit of Figure
1, according to an embodiment of the present invention;
[00023] Figure 4 illustrates another exploded perspective view of the energy
10 storage unit of Figure 1, according to an embodiment of the present invention; and
[00024] Figure 5 illustrates a view of the energy storage unit, according to an
embodiment of the present invention.
[00025] The drawings referred to in this description are not to be understood as
being drawn to scale except if specifically noted, and such drawings are only
15 exemplary in nature.
DETAILED DESCRIPTION
[00026] While the invention is susceptible to various modifications and
alternative forms, an embodiment thereof has been shown by way of example in the
20 drawings and will be described here below. It should be understood, however that it
is not intended to limit the invention to the particular forms disclosed, but on the
contrary, the invention is to cover all modifications, equivalents, and alternative
falling within the spirit and the scope of the invention.
[00027] The term “comprises”, comprising, or any other variations thereof, are
25 intended to cover a non-exclusive inclusion, such that a setup, structure or method that
~ 7 ~
comprises a list of components or steps does not include only those components or
steps but may include other components or steps not expressly listed or inherent to
such setup or structure or method. In other words, one or more elements in a system
or apparatus proceeded by “comprises… a” does not, without more constraints,
5 preclude the existence of other elements or additional elements in the system or
apparatus.
[00028] For better understanding of this invention, reference would now be made
to the embodiment illustrated in the accompanying Figures and description here
below, further, in the following Figures, the same reference numerals are used to
10 identify the same components in various views.
[00029] Referring to Figure 1, an energy storage unit (100), according to an
embodiment of the present invention is illustrated. The energy storage unit (100)
referred to herein, embodies a battery unit of a two wheeled vehicle. Alternatively, the
energy storage unit (100) may embody any other energy storage system that may be
15 used in vehicles such as scooters, motorcycles, three-wheeled vehicles, All-Terrain
Vehicles (ATV) etc. without limiting the scope of the invention.
[00030] The energy storage unit (100) comprises a plurality of energy storage
members (200). In the present embodiment, the plurality of energy storage members
(200) include a first energy storage member (200a), and a second energy storage
20 member (200b). In other embodiments, the plurality of energy storage members (200)
may include fewer or more number of energy storage units, such as the first energy
storage member (200a) or the second energy storage member (200b). The energy
storage unit (200) may be embodied as battery cells. The first energy storage member
(200a) may be a first battery pack (200a), and the second energy storage member
25 (200b) may be a second battery pack (200b).
[00031] Referring now to Figures 2, 3, and 4, the first battery pack (200a)
includes a first upstanding wall (202a), a second upstanding wall (204a), a third
upstanding wall (206a), and a fourth upstanding wall (208a). In addition, the first
~ 8 ~
battery pack (200a) includes a bottom wall (210a), and a top wall (212a). The first
upstanding wall (202a), the second upstanding wall (204a), the third upstanding wall
(206a), the fourth upstanding wall (208a), the bottom wall (210a), and the top wall
(212a) together form a cavity, wherein fuel cells or battery cells are arranged in a
5 predetermined pattern.
[00032] It may herein be understood that various planes along different axes are
used to explain position and relative position of various components of the energy
storage unit (100). The plane P3 passes vertically along axis H3, and is parallel to
plane H4 and perpendicular to plane P2.
10 [00033] As illustrated in Figure 5, the second upstanding wall (204a) and the third
upstanding wall (206a) of the first battery pack (200a) extend between the first
upstanding wall and (202a) and the fourth upstanding wall (208a) of the first battery
pack (200a).
[00034] The plane P2 passes along the fourth upstanding wall (208a) of the first
15 battery pack (200a). In an embodiment, plane P2, is parallel to the fourth upstanding
wall (208a). The plane P4, is perpendicular to plane P2 and passes through extreme
edge E2, formed by the second upstanding wall (204a), and the fourth upstanding wall
(208a), shown in Figure 5.
[00035] It may herein be noted that the edges, ends, planes, and axes as used
20 herein are for the purpose of explanation of the present embodiment and there may be
certain tolerances, and deviations, such as chamfer, fillet, cornering in relative
positions, without deviating from the spirit of the present invention.
[00036] In an embodiment, the second upstanding wall (204a) and the third
upstanding wall (206a) of the first battery pack (200a) extend between the first
25 upstanding wall and (202a) and the fourth upstanding wall (208a) of the first battery
pack (200a) at a predefined angular inclination, such as, an inclination B1 with respect
to a plane H4. In an embodiment, the inclination B1 is an acute angle. The inclination
B1 defines a draft on the first battery pack (200a). In particular, the draft of angle B1
~ 9 ~
is present on both the sides of the first battery pack (200a), along the second
upstanding wall (204a) and the third upstanding wall (206a) of the first battery pack
(200a).
[00037] In an embodiment, the first upstanding wall and (202a), and the fourth
5 upstanding wall (208a) are parallel. The third upstanding wall (206a) and the first
upstanding wall and (202a), are at an obtuse angle. B1. On the other hand, the third
upstanding wall (206a) and the fourth upstanding wall (208a) are at an acute angle.
[00038] In the same manner, the second upstanding wall (204a) and the fourth
upstanding wall (208a) form an acute angle. The third upstanding wall (206a) and the
10 second upstanding wall (204a), form an obtuse angle with the first upstanding wall
and (202a).
[00039] In an embodiment, the first upstanding wall and (202a) is parallel to the
fourth upstanding wall (208a). Further, the first upstanding wall and (202a) has a
length longer than the fourth upstanding wall (208a). Owing to this configuration of
15 the first upstanding wall (202a), the second upstanding wall (204a), the third
upstanding wall (206a), and the fourth upstanding wall (208a), the first battery pack
(200a) has a trapezoidal profile.
[00040] In the same manner, since the second battery pack (200b) is similar to
the first battery pack (200a), the second battery pack (200b) includes a fifth upstanding
20 wall (202b), a sixth upstanding wall (204b), a seventh upstanding wall (206b), and an
eighth upstanding wall (208b). In addition, the second battery pack (200b) includes a
bottom wall (210b), and a top wall (212b), shown in Figure 2. The fifth upstanding
wall (202b), the sixth upstanding wall (204b), the seventh upstanding wall (206b), the
eighth upstanding wall (208b), the bottom wall (210b), and the top wall (212b) are
25 joined together to form a cavity, wherein fuel cells or battery cells are arranged therein
in a predetermined alignment and arrangement.
[00041] As illustrated in Figure 5, the sixth upstanding wall (204b) and the
seventh upstanding wall (206b) of the second battery pack (200b) extend between the
~ 10 ~
first upstanding wall and (202b) and the fourth upstanding wall (208a) of the second
battery pack (200b).
[00042] In an embodiment, the sixth upstanding wall (204b) and the seventh
upstanding wall (206b) of the second battery pack (200b) extend between the fifth
5 upstanding wall (202b) and the eighth upstanding wall (208b) of the second battery
pack (200b) at the inclination B1 with respect to the plane H4, shown in Figure 5. In
an embodiment, the inclination B1 is an acute angle. The inclination B1 defines a draft
on the second battery pack (200b). In particular, the draft of angle B1 is present on
both the sides of the second battery pack (200b), along the sixth upstanding wall
10 (204b) and the seventh upstanding wall (206b) of the second battery pack (200b).
[00043] In an embodiment, the first upstanding wall and (202b) is parallel to the
eighth upstanding wall (208b). Further, the first upstanding wall and (202b) has a
length longer than the eighth upstanding wall (208b). Owing to this configuration of
the fifth upstanding wall (202b), the sixth upstanding wall (204b), the seventh
15 upstanding wall (206b), and the eighth upstanding wall (208b), the second battery
pack (200b) has a trapezoidal profile. Accordingly, the second battery pack (200b)
may be identical to the first battery pack (200a).
[00044] The plane P2 passes along the eighth upstanding wall (208b) of the
second battery pack (200b). In an embodiment, plane P2, is parallel to the eighth
20 upstanding wall (208b). The plane P4, is perpendicular to plane P2 and passes through
extreme edge E2, formed by the sixth upstanding wall (204b), and the eighth
upstanding wall (208b), shown in Figure 5.
[00045] In an embodiment, the first upstanding wall and (202b), and the eighth
upstanding wall (208b) are parallel. The seventh upstanding wall (206b) and the first
25 upstanding wall and (202b), are at an obtuse angle. B1. On the other hand, the seventh
upstanding wall (206b) and the eighth upstanding wall (208b) are at an acute angle.
[00046] In the same manner, the sixth upstanding wall (204b) and the eighth
upstanding wall (208b) form an acute angle. The seventh upstanding wall (206b) and
~ 11 ~
the sixth upstanding wall (204b), form an obtuse angle with the first upstanding wall
and (202b).
[00047] After assembly the eighth upstanding wall (208b), and the fourth
upstanding wall (208a) are parallel, and face each other.
5 [00048] Referring again to Figure 2, 3, 4 and 5, the energy storage unit (100)
further includes a casing unit (300). The casing unit (300) is adapted to receive, and
store each of the plurality of energy storage members (200). In an embodiment, the
casing unit (300) may be composed of a durable, non-metallic material. In alternative
embodiment, the casing unit (300) may be composed of any suitable material.
10 [00049] The casing unit (300) includes a first side cover (300a), and a second side
cover (300b). The first side cover (300a), and the second side cover (300b) are joined
along a joining edge (350). As such, the first side cover (300a) includes a joining edge
(350a) along the periphery, and the second side cover (300b) includes a joining edge
(350b) along the periphery. The position of the joining edge (350) is defined later in
15 the description.
[00050] The first side cover (300a) includes a first cover first wall (302a), and at
least one first cover second wall extends outwardly at an angle from the first cover
first wall (302a), and a first bottom wall (306a). In illustrated embodiment, the first
side cover (300a) includes the first cover first wall (302a), first cover second wall
20 (304a), first cover third wall (305a), and the first bottom wall (306a). The first bottom
wall (306a) includes first bottom free edge (306f).
[00051] The first cover second wall (304a) extends outwardly from the first cover
first wall (302a) at a predetermined angle (A) with respect to the first cover first wall
(302a) [refer Figure 5]. In an example, the predetermined angle (A) is about 101
25 degree.
[00052] The first cover second wall (304a) extends outwardly from the first cover
first wall (302a) forming a first free edge (304f’) and a first connected edge (304c’).
~ 12 ~
The first cover third wall (305a) extends outwardly from the first cover first wall
(302a) forming a second free edge (305f’) and a second connected edge (305c’).
[00053] In an embodiment, the first cover first wall (302a) includes a right wall
first cover first wall (303a) and a left wall first cover first wall (303b). In an
5 embodiment, the right wall first cover first wall (303a) and the left wall first cover
first wall (303b) are coplanar. In the illustrated embodiment, the right wall first cover
first wall (303a) is positioned at an inclination with respect to the left wall first cover
first wall (303b) [refer Figure 5].
[00054] The first cover first wall (302a), the first cover second wall (304a), and
10 the first cover third wall (305a) extends upwardly at a right angle from the first bottom
wall (306a). More specifically, there is no draft angle provided on the wall first cover
first wall (302a) the first cover second wall (304a), and the first cover third wall (305a)
with respect to the first bottom wall (306a).
[00055] The first cover second wall (304a) is positioned at an inclination A1 with
15 respect to the horizontal plane along H1. The inclination A1 defines a draft angle on
the first side cover (300a). In an example, the inclination A1 that defines the draft
angle on the first side cover (300a) is 3 degrees. The distance between the first free
edge (304f) and the second free edge (305f) is greater than the distance between the
first connected edge (304c) and the second connected edge (305c).
20 [00056] The second side cover (300b) includes at least one second cover first wall
(302b), and at least one second cover second wall extends outwardly from the second
cover first wall (302b), and a second bottom surface (306b). In illustrated embodiment,
the second side cover (300b) includes the second cover first wall (302b), second cover
second wall (304b), second cover third wall (305b), and the second bottom wall
25 (306b).
[00057] The second bottom wall (306b) includes second bottom free edge
(306f’). The second cover second wall (304b) extends outwardly from the second
~ 13 ~
cover first wall (302b) at a predetermined angle (A’) with respect to the second vertical
wall (302a).
[00058] In an embodiment, the second cover first wall (302b) includes a right
wall second cover first wall (303a’) and a left wall second cover first wall (303b’).
5 The right wall second cover first wall (303a’) is positioned at the inclination of B2
from the horizontal axis H4. Likewise, the left wall second cover first wall (303b’) is
positioned at the inclination of B2 from the horizontal axis H4.
[00059] The second cover first wall (302b) and the second cover second wall
(304b), second cover third wall (305b) extends upwardly at a right angle from the
10 second bottom surface (306b). More specifically, there is no draft angle provided on
the second cover first wall (302b) the second cover second wall (304b), second cover
third wall (305b) with respect to the second bottom surface (306b).
[00060] The second cover second wall (304b) includes a right second cover
second wall (304b), and a left second cover second wall (305b). Each of the right
15 second cover second wall (304b), and the left second cover second wall (305b) are
positioned at the inclination A1 with respect to the horizontal plane along H2. The
inclination A1 defines a draft angle on the second side cover (300b).
[00061] This draft angle on the second side cover (300b) ensures considerable
ease of manufacturing of the second side cover (300b). Further, since the length of
20 each of the right second cover second wall (304b), and the left second cover second
wall (305b) along plane H2, is less than the height of each of the right second cover
second wall (304b), and the left second cover second wall (305b) where no draft is
provided, there is minimum loss of utilizable space in the second side cover (300a).
[00062] The first bottom free edge (306f), the first free edge (304f) and the second
25 free edge (305f) form the joining edge (350). Further, second bottom free edge (306f’),
the first free edge (304f’) and the second free edge (305f’) also form the joining edge
(350).
~ 14 ~
[00063] The first battery pack (200a) is positioned in the casing unit (300) such
that the first upstanding wall (202a) and the fourth upstanding wall (208a) of the first
battery pack (200a) are at an angle to the line joining the first free edge (304f) and the
second free edge (305f). In an embodiment, first battery pack (200a) is positioned in
5 the casing unit (300) such that the first upstanding wall (202a) and the fourth
upstanding wall (208a) of the first battery pack (200a) are perpendicular to the line
joining the first free edge (304f) and the second free edge (305f).
[00064] Moreover, the first battery pack (200a) is positioned in the casing unit
(300) such that a weight of the first battery pack (200a) is shared by each of the first
10 side cover (300a) and the second side cover (300b). In an embodiment, the first battery
pack (200a) is positioned in the casing unit (300) such that the weight of the first
battery pack (200a) is applied on each of the first side cover (300a) and the second
side cover (300b).
[00065] Further, the second battery pack (200b) is positioned in the casing unit
15 (300) such that a weight of the second battery pack (200b) is shared by each of the
first side cover (300a) and the second side cover (300b). In an embodiment, the second
battery pack (200b) is positioned in the casing unit (300) such that the weight of the
second battery pack (200a) is applied on each of the first side cover (300a) and the
second side cover (300b).
20 [00066] In an embodiment, the first side cover (300a) is formed by a molding
process, wherein the mold ejection direction is normal to the first cover first wall
(302a). Likewise, the second side cover (300b) is formed by a molding process,
wherein the mold ejection direction is normal to the second cover first wall (302b).
[00067] Owing to such placement and positioning of the first battery pack (200a)
25 and the second battery pack (200b), a proper and balanced distribution of weight is
achieved. Therefore, since each of the first side cover (300a) and the second side cover
(300b) carry the weight of the first battery pack (200a) and the second battery pack
(200b), possibility of damage to the casing unit (300) is significantly reduced.
~ 15 ~
[00068] As the length of the wall increases the gap at the free edge of the wall
increase from the imaginary plane passing through the direction of mold ejection. In
accordance with the present invention as the casing unit (300) is formed by joining
two side covers as the first side cover (300a) and the second side cover (300b), separate
5 drafts (same or different angle) can be provided on the first side cover (300a) and the
second side cover (300b). This enables lesser gap at the free edge of the walls that
enables better space utilization. Also this ensures compact design leading to better
vibration characteristics.
[00069] Further, width of the casing unit (300) is smaller than height of the casing
10 unit (300), and since the draft angle is provided in the width direction, this further
enables the maximum space utilization as This enables lesser deviation / gap of the
walls (perpendicular to the direction of ejection of mold). Also this design does not
require drafts in the height direction, this enables in sturdy design of the casing unit
(300).
15 [00070] Also, position of the battery packs is at an angle or perpendicular to the
joining edge (350), this enables in better stability of the overall structure.
[00071] The casing unit (300) of the present invention also ensures that there is
higher density of battery cells, as conical areas, and sharp corners of space in the
casing unit (300) are precluded
20 [00072] While few embodiments of the present invention have been described
above, it is to be understood that the invention is not limited to the above embodiments
and modifications may be appropriately made thereto within the spirit and scope of
the invention.
[00073] While considerable emphasis has been placed herein on the particular
25 features of this invention, it will be appreciated that various modifications can be
made, and that many changes can be made in the preferred embodiments without
departing from the principles of the invention. These and other modifications in the
nature of the invention or the preferred embodiments will be apparent to those skilled
~ 16 ~
in the art from the disclosure herein, whereby it is to be distinctly understood that the
foregoing descriptive matter is to be interpreted merely as illustrative of the invention
and not as a limitation.

We claim:

1. An energy storage unit (100) comprising:
a plurality of energy storage members (200); and
5 a casing unit (300) adapted to accommodate each of the plurality of
energy storage members (200), the casing unit (300) comprises,
a first side cover (300a) comprising a first cover first wall (302a),
at least one first cover second wall (304a) extending from the first cover
first wall (302a) at a predetermined angle (A) with respect to the first cover
10 first wall (302a), and a first bottom wall (306a); and
a second side cover (300b) comprising a second cover first wall
(302b), and at least one second cover second wall (304b) extending from
the second cover first wall (302b) at a predetermined angle (A’) with
respect to the second cover first wall (302b), and a second bottom surface
15 (306b),
wherein the first side cover (300a) and the second side cover (300b) are
adapted to be joined together to form the casing unit (300) having the first
cover first wall (302a), at least one first cover second wall (304a), the first
bottom wall (306a); the second cover first wall (302b), at least one second
20 cover second wall (304b), the second bottom surface (306b) and a top
opening (306t),
wherein the plurality of energy storage members (200) are adapted to be
stored in the casing unit (300) formed by the first side cover (300a) and the
second side cover (300b).
25
2. The energy storage unit (100) as claimed in claim 3 wherein the plurality
of energy storage members (200) include a first battery pack (200a), and a
second battery pack (200b), wherein the first battery pack (200a) includes
the first upstanding wall (202a), the second upstanding wall (204a), a third
30 upstanding wall (206a), and a fourth upstanding wall (208a), and wherein
the second battery pack (200b) includes a fifth upstanding wall (202b), a
~ 18 ~
sixth upstanding wall (204b), a seventh upstanding wall (206b), and an
eighth upstanding wall (208b).
3. The energy storage unit (100) as claimed in claim 1 and 2 further
5 comprising; the first side cover (300a) is adapted to be joined with the
second side cover (300b) along a joining edge (350) to form the casing unit
(300), wherein the first upstanding wall (202a) and the fifth upstanding wall
(202b) are at an angle with respect to the joining edge (350).
10 4. The energy storage unit (100) as claimed in claim 3, wherein the first
upstanding wall (202a) and the fifth upstanding wall (202b) are
perpendicular with respect to the joining edge (350).
5. The energy storage unit (100) as claimed in claim 2, wherein the second
15 upstanding wall (204a) and the third upstanding wall (206a) of the first
battery pack (200a) extend between the first upstanding wall (202a) and the
fourth upstanding wall (208a) of the first battery pack (200a), at an angle,
and
wherein the sixth upstanding wall (204b) and the seventh upstanding
20 wall (206b) of the second battery pack (200b) extend between fifth
upstanding wall (202b) and the eighth upstanding wall (208b) of the second
battery pack (200b), at an angle.
6. The energy storage unit (100) as claimed in claim 1, wherein the first side
25 cover (300a) of the casing unit (300) further includes the first bottom
surface (306a), wherein the first cover first wall (302a), at least one first
cover second wall (304a) extends upwardly at a right angle from the first
bottom surface (306a).
30 7. The energy storage unit (100) as claimed in claim 1, wherein the second
side cover (300b) of the casing unit (300) further includes the second
~ 19 ~
bottom surface (306b), wherein the second cover first wall (302b) and the
second cover second wall (304b) extends upwardly at a right angle from
the second bottom surface (306b).
5 8. The energy storage unit (100) as claimed in claim 6, wherein the at least
one first cover second wall (304a) includes a right first cover second wall
(304a), and a left first cover second wall (305a), wherein each of the right
first cover second wall (304a), and the left first cover second wall (305a)
are positioned at an inclination with respect to the horizontal plane, wherein
10 the inclination defines a draft angle on the first side cover (300a), and
wherein
the at least one second cover second wall (304b) includes a right second
cover second wall (304b), and a left second cover second wall (305b),
wherein each of the right second cover second wall (304b), and the left
15 second cover second wall (305b) are positioned at an inclination with
respect to the horizontal plane, wherein the inclination defines a draft angle
on the second side cover (300b).
9. The energy storage unit (100) as claimed in claim 8, wherein the first
20 battery pack (200a) is positioned in the casing unit (300) such that the first
upstanding wall (202a) and the fourth upstanding wall (208a) of the first
battery pack (200a) is perpendicular to the joining edge (350), whereby the
first battery pack (200a) is positioned in the casing unit (300) such that a
weight of the first battery pack (200a) is shared by each of the first side
25 cover (300a) and the second side cover (300b).
10. The energy storage unit (100) as claimed in claim 8, wherein the second
battery pack (200b) is positioned in the casing unit (300) such that the first
upstanding wall (202a) and the fourth upstanding wall (208a) of the second
30 battery pack (200b) is perpendicular to the joining edge (350), whereby the
second battery pack (200b) is positioned in the casing unit (300) such that
~ 20 ~
a weight of the second battery pack (200b) is shared by each of the first side
cover (300a) and the second side cover (300b).
11. The energy storage unit (100) as claimed in claim 1, wherein the first side
5 cover (300a) is formed by a molding process, wherein the mold ejection
direction is normal to the first cover first wall (302a)
12. The energy storage unit (100) as claimed in claim 1, wherein the second
side cover (300b) is formed by a molding process, wherein the mold
10 ejection direction is normal to the second cover first wall (302b).