FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION (See section 10, rule 13)
1. Title of the invention: BATTERY PACKS
2. Applicant(s)
NAME NATIONALITY ADDRESS
ALPHAVECTOR INDIA PVT. LTD. Indian 3rd Floor, Swastik Super Market Ashram Road Ahmedabad-Gujrat-380009, India
3. Preamble to the description
COMPLETE SPECIFICATION
The following specification particularly describes the invention and the manner in which it
is to be performed.

BACKGROUND
[0001] In general, battery packs are used in vehicles, particularly electric
vehicles or hybrid vehicles to electrically power the vehicle. In case the vehicle is a bicycle, the battery pack may be inserted inside a frame of the bicycle.
BRIEFDESCRIPTIONOF THE DRAWINGS
[0002] The following detailed description references the drawings,
wherein:
[0003] FIG.1 shows a perspective view of a battery pack, according to an
example;
[0004] FIG.2 shows a cross-sectional view of a battery pack disposed
inside a frame of a vehicle, according to an example;
[0005] FIG.3 shows a perspective view of a battery pack disposed inside
a frame of a vehicle, according to an example; and
[0006] FIG.4 shows a schematic view of one end of a battery pack
disposed inside a frame of a vehicle, according to an example.
DETAILED DESCRIPTION
[0007] A battery pack is generally disposed inside a frame of a vehicle,
for example, a bicycle to power a motor disposed in the vehicle to move the vehicle electrically. In an example, when the vehicle is a bicycle, the frame may be a down tube. The down tube is a frame of the bicycle that connects a head tube, on which a handlebar of the bicycle is installed, and a bottom bracket, to which one end of a seat tube is connected. The seat tube is a frame of the bicycle on one end of which a seat post is provided.

[0008] Generally, cable terminals of the battery pack are disposed at one
end of the battery pack and different cables are provided at the cable terminals. In an example, the different cables may include, but is not limited to, connector cable and charger cable. To connect the connector cable with a control unit disposed at the other end of the battery pack, which is distal from the cable terminals, the connector cable is routed external to the frame, for example, downtube of the vehicle. Similarly, to connect the charger cable with a charging unit, in an example, disposed at the handlebar of the vehicle, the charging cable is routed external to the frame, for example, downtube of the vehicle.
[0009] The external routing of the different cables exposes the cables to
sunlight and dirt, which may deteriorate the material of the cables due to the exposure. Also, since the cables are externally routed and exposed, the cables may be damaged by the rodents, for example, the cables may be damaged by rats in case the vehicle is parked in a rodent rich region. To route the cables external to the frame, openings are present on the frame, particularly near a bottom bracket of the vehicle. When the vehicle is driven on a muddy terrain, mud or water or both may ingress into the frame via the openings and therefore the battery pack disposed inside the frame may be affected by the ingresses mud or water or both. In addition, the routing of the cables external to the frame is aesthetically unpleasing.
[0010] The present subject matter describes example battery packs
disposable in a frame of a vehicle. Whilst the battery pack of the present subject matter can be disposed in a frame of any vehicle to be electrically powered, such as an electric bicycle, an electric tricycle, and an electric two-wheeler, for the sake of convenience, the battery pack shall be described herein when attached specifically to a bicycle. Using the example battery pack described herein, different cables of the battery back can be routed internally within the frame, for example, downtube of the bicycle and

therefore the cables can be protected from the damage which would have caused if the cables are routed external to the frame of the bicycle.
[0011] In an example, a battery pack is disposable in a frame of a bicycle
and includes a housing, a plurality of battery cells, and a battery cell gripper. The housing is a component to enclose the battery pack and the housing is inserted to any frame of a bicycle. More particularly, the frame is a down tube. The battery cell is a source of electric power having one or more electrochemical cells with external connections for powering electrical devices. The battery cell gripper is a structure configured to hold each battery cell within the housing. The plurality of cylindrical battery cells is disposed in the housing and one battery cell gripper grips the plurality of cylindrical battery cells in the housing. In an example, multiple battery cell grippers can be disposed in the housing to hold the plurality of cylindrical battery cells. The battery cell gripper includes a plurality of circular slots and one or more openings. The plurality of circular slots is to grip the plurality of cylindrical battery cells. Each opening of the battery cell gripper is a through-passage. The opening to form a first passage along a longitudinal dimension of the housing to route a first set of cables within the housing for electrically connecting each of the plurality of cylindrical battery cells. The opening in the battery cell gripper forming the first passage allows the first set of cables to be routed within the housing of the battery pack without an increase in the size or the cross-section of the battery pack. Further, the battery cell gripper is to form a second passage external to the housing and along the longitudinal dimension of the housing, when the battery pack is disposed in the frame of the vehicle. The second passage is formed between an inner surface of the frame and an outer surface of the housing. When the battery pack is disposed in the frame of the vehicle, the second passage routes a second set of cables, disposed at a first end of the housing, external to the housing but within the frame, for example, down tube. In an example, the second set of cables may include a connector cable and one or more charging cables. Since the second set of cables are

internally routed within the down tube alongside the battery pack, need for opening in the frame near the bottom bracket is omitted.
[0012] The feature of the battery pack that enable formation of the second
passage between the inner surface of the frame and the outer surface of the housing, when the battery pack is disposed in the frame of the vehicle, prevents the cables from exposure to sunlight and dirt, which may deteriorate the material of the cables. In addition, the routing of the cables internally within the frame makes the bicycle aesthetically pleasing.
[0013] These and other advantages of the present subject matter would
be described in a greater detail in conjunction with the FIGS. 1-4 in the
following description. The manner in which the battery pack is implemented
and used shall be explained in detail with respect to the FIGS. 1-4.
[0014] It should be noted that the description merely illustrates the
principles of the present subject matter. It will thus be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described herein, embody the principles of the present subject matter and are included within its scope. Furthermore, all examples recited herein are intended only to aid the reader in understanding the principles of the present subject matter. Moreover, all statements herein reciting principles, aspects and implementations of the present subject matter, as well as specific examples thereof, are intended to encompass equivalents thereof.
[0015] The following detailed description refers to the accompanying
drawings. Wherever possible, the same reference numbers are used in the drawings and the following description to refer to the same or similar parts. While several examples are described in the description, modifications, adaptations, and other implementations are possible. Accordingly, the following detailed description does not limit the disclosed examples. Instead, the proper scope of the disclosed examples may be defined by the appended claims.

[0016] FIG.1 shows a perspective view of a battery pack 100, according
to an example. The battery pack 100 is a device having multiple batteries connected to each other to power any electric device connected to the battery pack 100. In an example, if the battery pack 100 is disposed in a bicycle (not shown), the battery pack 100 may power a motor (electric device) disposed in the bicycle to power the bicycle thereof. The battery pack 100 is replaceable with a new battery pack 100 when the life duration of the batteries of the old battery pack 100 is over. The battery pack 100 is disposed in a frame (not shown in FIG.1) of the bicycle. Whilst the battery pack 100 of the present subject matter can be disposed to any vehicle (now shown in FIG.1), for the sake of convenience, the battery pack 100 shall be described herein when attached specifically to the bicycle (now shown). The battery pack 100 includes a plurality of cylindrical battery cells 102-1. 102-2, 102-3 (hereinafter referred to as 102) and one or more battery cell gripper 104-1, 104-2, 104-3, 104-4, 104-5 (hereinafter referred to as 104) to grip each of the plurality of cylindrical battery cells 102. The cylindrical battery cell 102 is a cell that can handle high internal pressure without deforming and have a better temperature control as compared to other types of battery cells. In an example, each of the plurality of cylindrical battery cells 102 is a Lithium-Ion battery cell. In an example, the cylindrical battery cell 102 may be alkaline or nickel metal hydride. In an example, the battery pack 100 may have five to fifty cylindrical battery cells 102 depending on the requirement. In an example, the battery pack 100 comprises five cylindrical battery cells 102 to provide an optimized pentagonal shape to the battery pack 100 and to the frame and makes the frame sleek due to the optimized pentagonal shape. In an example, the battery pack 100 comprises seven cylindrical battery cells 102. In an example, the battery pack 100 comprises nine cylindrical battery cells 102. The battery cell gripper 104 is a specific structure to hold or grip the plurality of cylindrical battery cells 102 so that the plurality of cylindrical battery cells 102 gripped onto the battery cell gripper 104 can be packed in a housing 106 of the battery pack 100. The

housing 106 is an enclosure that encloses the plurality of cylindrical battery cells 102 interconnected to each other. In an example, the housing 106 can be made of aluminum. In an example, the housing 106 may be extruded and may include channels (not shown) so that bolts or self-tapping screws can be assembled directly. In such a housing 106, the length of the housing 106 is adjustable for allowing customization in the sizes of the battery pack 100 depending on the requirements of the number of cylindrical battery cells, such as 20-cells, 30-cells, etc.
[0017] Further, the battery cell gripper 104 of the battery pack 100
includes a plurality of circular slots 202-1, 202-2, 202-3, 202-4, 202-5 (hereinafter referred to as 202) to grip the plurality of cylindrical battery cells 102 and is shown in FIG.2. FIG.2 shows a cross-sectional view of the battery pack 100 disposed inside the frame 204 of the vehicle, according to an example. The vehicle is the bicycle in this example. A perspective view of the battery pack 100 when disposed inside the frame of the vehicle is also shown in FIG.3. Hereinafter, the battery pack 100 will be described in conjunction with FIGS 1-3. The battery cell gripper 104 further includes an opening 206-1, 206-2, 206-3 (hereinafter referred to as 206) to form a first passage along a longitudinal dimension of the housing 106 to route a first set of cables (not shown) within the housing 106 for electrically connecting each of the plurality of cylindrical battery cells 102. Each opening 206 of the battery cell gripper 104 includes a joint cap 208-1, 208-2, 208-3 (hereinafter referred to as 208) to restrict the first set of cables within the opening of the battery cell gripper 104 so that the battery cell gripper 104 having the gripped and interconnected cylindrical battery cells 102 can be conveniently housed in the housing 106 and the first set of cables can be routed inside the housing 106 of the battery pack 100 without an increase in the size or cross-section of the battery pack 100. The first set of cables may be conductive wires to connect the cylindrical battery cells 102 in series or in parallel depending on the requirement of the electric device to which the battery pack 100 is to be connected.

[0018] The battery cell gripper 104 further includes an auxiliary opening
210 at a location between the cylindrical battery cells 102 to provide additional passage for the first set of cables within the housing 106 for electrically connecting each of the plurality of cylindrical battery cells 102. The auxiliary opening 210 is preferably circular. However, it is envisaged that any other suitable shape may also be adopted for the auxiliary opening 210.
[0019] In an example, the battery pack 100 includes an asymmetric
cross-section. The asymmetric cross-section of the battery pack 100 is due to the design of the battery cell gripper 104, which is formed to provide a second passage 212. The second passage 212 is provided external to the housing 106 and along the longitudinal dimension of the housing 106, when the battery pack 100 is disposed in the frame 204 of the vehicle. When the battery pack 100 is disposed in the frame 204 of the vehicle, an opening is formed between an inner surface 214 of the frame 204 and an outer surface 216 of the housing 106. Said opening provides the second passage 212 along the longitudinal dimension of the housing 106 and between the inner surface 214 and the outer surface 216.
[0020] The second passage 212 provides a through passage to a second
set of cables (not shown) disposed at a first end 108 of the housing 106. Via the second passage 212, the second set of cables can be routed external to the housing 106, when the battery pack 100 is disposed in the frame 204 of the vehicle. In an example, the second set of cables includes a connector cable and a charging cable. In an example, the connector cable has a diameter of 6 mm. However, it is envisaged that any other suitable diameter may also be adopted for the connector cable. In an example, the charging cable has a diameter of 2 mm, and two charging cables are included in the battery pack 100. However, it is envisaged that any other suitable diameter and suitable number may also be adopted for the charging cable.

[0021] In an example, one circular slot of the plurality of circular slots 202
is offset to a central axis of the housing 106 to form the second passage 212 external to the housing 106 and along the longitudinal dimension of the housing 106.
[0022] With the provision of the second passage 212 external to the
housing 106 of the battery pack 100 but within the frame 204 (down tube) of the vehicle, additional cables such as the connector cable and the charging cable can be routed internally within the frame 204. Therefore, said additional cables, which are the second set of cables, are not exposed to external influences, such as direct sunlight, water, and other dirt particles. Also, internal routing of the additional cables makes the vehicle aesthetically pleasing.
[0023] The arrangement of the cylindrical battery cells 102 in the battery
cell gripper 104 with the provisions of internal routing of cables within the housing 106 and internal routing of cables within the frame 204 allows the battery pack 100 to be sleek. Such a sleek battery pack 100 further allows the reduction of the cross-section of the frame 204, for example, down tube and hence reducing the weight of the frame 204 and saves on the cost of the frame 204. The asymmetrical shape of the battery pack 100 and the pentagonal shape of the frame 204 prohibits wrong insertion of the battery pack 100 in the frame 204 as the battery pack 100 can be inserted in only one way correctly.
[0024] In an example, the battery pack 100 includes a rope (not shown),
disposed at the first end 110 of the housing 106, to pull the battery pack 100 out of the frame 204, when the battery pack 100 is disposed in the frame 204 of the vehicle. The rope provided with the battery pack 100 makes the pulling of the battery pack 100 out of the frame 204 easier in case any replacement or repair in the battery pack 100 is required. In an example, a strengthening element (now shown) is disposed at one end of the housing of the battery pack 100 to support the additional pull force in case required.

[0025] In an example, the battery pack 100 comprises a holding plate 110
disposed at a second end 112 of the housing 106 to hold a control unit (not shown) to receive the second set of cables for connection thereof when the battery pack 100 is disposed in the frame 204 of the vehicle. In an example, the holding plate 110 is in the form of an extended tray provided on a cap of the battery pack 100 at the second end 112. The control unit is motor controller that regulates the motor of the vehicle to drive the vehicle. The holding plate 110 in the form of the extended tray allows housing of the control unit of different sizes that allows in better cable management.
[0026] FIG.4 shows a schematic view of one end of the battery pack 100
disposed inside the frame 204 of the vehicle, according to an example.
[0027] Although implementations for the battery pack 100 are described,
it is to be understood that the present subject matter is not necessarily limited to the specific features described. Rather, the specific features are disclosed as implementations.

I/We Claim:
1. A battery pack (100) disposable in a frame (204) of a vehicle, the battery
pack (100) comprising:
a housing (106);
a plurality of cylindrical battery cells (102) disposed in the housing (106); and
at least one battery cell gripper (104) to grip the plurality of cylindrical battery cells (102) in the housing (106),
wherein the at least one battery cell gripper (104) comprises:
at least one opening (206) to form a first passage along a longitudinal dimension of the housing (106) to route a first set of cables within the housing (106) for electrically connecting each of the plurality of cylindrical battery cells (102); and
a plurality of circular slots (202) to grip the plurality of cylindrical battery cells (102), wherein the at least one battery cell gripper (104) is to form a second passage (212) external to the housing (106) and along the longitudinal dimension of the housing (106), when the battery pack (100) is disposed in the frame (204) of the vehicle, wherein the second passage (212) is between an inner surface (214) of the frame (204) and an outer surface (216) of the housing (106).
2. The battery pack (100) as claimed in claim 1, wherein the battery pack (100) comprises a second set of cables, disposed at a first end (108) of the housing (106), to be routed external to the housing (106) via the second passage (212), when the battery pack (100) is disposed in the frame (204) of the vehicle.
3. The battery pack (100) as claimed in claim 2, wherein the second set of cables comprises a connector cable and a charging cable.

4. The battery pack (100) as claimed in claim 2, wherein the battery pack (100) comprises a rope, disposed at the first end (108) of the housing (106), to pull the battery pack (100) out of the frame (204), when the battery pack (100) is disposed in the frame (204) of the vehicle.
5. The battery pack (100) as claimed in claim 2, wherein the battery pack (100) comprises a holding plate (110) disposed at a second end (112) of the housing (106) to hold a control unit to receive the second set of cables for connection thereof when the battery pack (100) is disposed in the frame (204) of the vehicle.
6. The battery pack (100) as claimed in claim 1, wherein the battery pack (100) comprises five cylindrical battery cells.
7. The battery pack (100) as claimed in claim 1, wherein the battery pack (100) comprises an asymmetric cross-section.
8. The battery pack (100) as claimed in claim 1, wherein each of the plurality of cylindrical battery cells (102) is a Lithium-Ion battery cell.
9. The battery pack (100) as claimed in claim 1, wherein one circular slot of the plurality of circular slots (202) is offset to a central axis of the housing (106) to form the second passage (212) external to the housing (106) and along the longitudinal dimension of the housing (106).
10. A vehicle having a battery pack (100) as claimed in one of claims 1 to
9.