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A Cooling System For Battery Cells In A Battery Pack

Abstract: A cooling system for battery cells in a battery pack A cooling system (600) comprises a battery pack, a sensor unit, a chiller unit (80), a control unit, and a cooling plate (20). The sensor unit measures the temperature of cylindrical cells (60) in the battery pack. Based on the measured temperature, the control unit activates the chiller unit to dispense cold coolant liquid. The cooling plate receives the dispensed cold coolant liquid via an inlet manifold (30). The surface of the cooling plate includes a plurality of cooling zones (50). Each cooling zone comprises a well-shaped member (54) for contacting the entirety of the bottom surface area of the cylindrical cell. A portion of the coolant liquid flows to the well-shaped for cooling the cylindrical cell. After cooling the cylindrical cell, the portion of the coolant liquid exits the cooling zone without thermally interacting with another cylindrical cell. The coolant liquid exits the cooling plate via an outlet manifold (40). FIG. 6

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
12 January 2024
Publication Number
29/2025
Publication Type
INA
Invention Field
MECHANICAL ENGINEERING
Status
Email
Parent Application

Applicants

OLA ELECTRIC MOBILITY LIMITED
Regent Insignia, #414, 3rd Floor, 4th Block, 17th Main, 100 Feet Road, Koramangala, Bangalore - 560034, Karnataka, India

Inventors

1. Arun Raj Chidambaram
688, Main road, Muthukrishna puram, Elumedu post, Panruti T.K, Tamil Nadu -607104, India
2. Rajasekar Jonnalagadda Balu
Flat No 011, Dhaaruni Residence, 512/10, Mahadevapura, ORR, Bangalore, Karnataka – 560048, India

Specification

1. A system (600) for cooling of a battery pack, comprising:
the battery pack including a plurality of cylindrical cells (60) to be cooled;
5 a sensor unit comprising a plurality of sensors, associated with the battery pack, for measuring
the temperature of the battery pack;
a chiller unit (80) for dispensing coolant liquid to cool the battery pack; and
a cooling plate (20), in fluid communication with the chiller unit and in thermal contact with
each cylindrical cell, among the plurality of cylindrical cells in the battery pack, comprising:
10 an inlet manifold (30) for receiving the coolant liquid from the chiller unit;
an outlet manifold (40) through which the coolant liquid exits from the cooling plate; and
a plurality of cooling zones (50) arranged in a row on the surface of the cooling plate,
each cooling zone comprising:
a well-shaped member (54) for contacting the entirety of the bottom surface area
15 of a cylindrical cell, among the plurality of cylindrical cells;
an entrance channel (52) connected to the inlet manifold and the well-shaped
member, the entrance channel directing a flow of a portion of the coolant liquid
from the inlet manifold to the well-shaped member; and
an exit channel (56) connected to the outlet manifold and the well-shaped
20 member, the exit channel directing a flow of the portion of the coolant liquid from
the well-shaped member to the outlet manifold; and
a control unit, operatively coupled to the sensor unit and the chiller unit, configured to:
obtain, from the sensor unit, the temperature of the battery pack; and
activate or deactivate the chiller unit to control the dispensing of the coolant liquid, based
25 on the temperature of the battery pack.
2. The system as claimed in claim 1, comprising a pump (70) in fluid communication with the
cooling plate and the chiller unit, wherein the pump directs the coolant liquid from the outlet
manifold of the cooling plate to the chiller unit.
30
17
3. The system as claimed in claim 1, wherein the entrance channel and the exit channel are
connected to the inlet manifold and the outlet manifold, respectively, via at least one of: a
straight flow path; and a serpentine flow path.
5 4. The system as claimed in claim 1, wherein the entrance channel is connected to a first side of
the well-shaped member, and the exit channel is connected to a second side of the well-shaped
member, wherein the second side is opposite to the first side.
5. The system as claimed in claim 1, wherein the well-shaped member has either a flat surface or
10 a depression, through which the well-shaped member contacts the bottom surface area of the
cylindrical cell.
6. A method (800) for cooling of a battery pack, comprising:
measuring (802), by a sensor unit comprising a plurality of sensors, associated with the battery
15 pack, the temperature of the battery pack, wherein the battery pack comprises a plurality of
cylindrical cells (60);
obtaining (804), by a control unit, the temperature of the battery pack from the sensor unit;
activating, by the control unit, a chiller unit (80) to dispense coolant liquid based on the
temperature of the battery pack;
20 receiving (808), by an inlet manifold (30) of a cooling plate (20), the coolant liquid from the
chiller unit, wherein the cooling plate is in thermal contact with each cylindrical cell, among the
plurality of cylindrical cells in the battery pack, and the cooling plate comprises:
a plurality of cooling zones (50) arranged in a row on the surface of the cooling plate,
each cooling zone comprising:
25 a well-shaped member (54) for contacting the entirety of the bottom surface area
of a cylindrical cell, among the plurality of cylindrical cells;
an entrance channel (52) connected to the inlet manifold and the well-shaped
member; and
an exit channel (56) connected to an outlet manifold (40) of the cooling plate and
30 the well-shaped member;
18
directing, by the entrance channel, a portion of the coolant liquid from the inlet manifold to the
well-shaped member; and
directing, by the exit channel, the portion of the coolant liquid from the well-shaped member to
the outlet manifold.
5
7. The method as claimed in claim 6, comprising:
directing, by a pump (70), the coolant liquid from the outlet manifold of the cooling plate to the
chiller unit.
10 8. The method as claimed in claim 6, wherein the entrance channel and the exit channel are
connected to the inlet manifold and the outlet manifold, respectively, via at least one of: a
straight flow path; and a serpentine flow path.
9. The method as claimed in claim 6, wherein the entrance channel is connected to a first side of
15 the well-shaped member, and the exit channel is connected to a second side of the well-shaped
member, wherein the second side is opposite to the first side.
10. The method as claimed in claim 6, wherein the well-shaped member has either a flat surface
or a depression, through which the well-shaped member contacts the bottom surface area of the
20 cylindrical cell.

Documents

Application Documents

# Name Date
1 202441002498-STATEMENT OF UNDERTAKING (FORM 3) [12-01-2024(online)].pdf 2024-01-12
2 202441002498-FORM 1 [12-01-2024(online)].pdf 2024-01-12
3 202441002498-DRAWINGS [12-01-2024(online)].pdf 2024-01-12
4 202441002498-DECLARATION OF INVENTORSHIP (FORM 5) [12-01-2024(online)].pdf 2024-01-12
5 202441002498-COMPLETE SPECIFICATION [12-01-2024(online)].pdf 2024-01-12
6 202441002498-Proof of Right [12-04-2024(online)].pdf 2024-04-12
7 202441002498-FORM-26 [12-04-2024(online)].pdf 2024-04-12