FORM 2
THE PATENTS ACT, 1970
(39 OF 1970)
AND
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See Section 10; rule 13)
TITLE OF THE INVENTION
“A BATTERY PACK WITH A UNIFIED COOLING PLATE AND THERMAL PADS FOR TEMPERATURE MANAGEMENT”
APPLICANT(S)
TATA MOTORS LIMITED
Bombay House, 24 Homi Mody Street,
Hutatma Chowk, Mumbai 400 001, Maharashtra, India; an Indian company.
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed.

A BATTERY PACK WITH A UNIFIED COOLING PLATE AND THERMAL PADS FOR TEMPERATURE MANAGEMENT
FIELD OF THE INVENTION
[0001] The present invention relates to battery temperature management, and more specifically related to a battery pack with a unified cooling plate and thermal pads for temperature management.
BACKGROUND OF THE INVENTION
[0002] Battery packs, especially lithium class batteries, are widely used as energy sources in electronic devices. A battery pack generally have a plurality of battery cells which are connected to obtain high output.
[0003] As shown in the FIG. 1, each battery pack includes battery cell/pouch “A” (1) and battery cell/pouch “B” (2), and a separator (3) between battery cells/pouch. The battery cells/pouch are repeatedly charged and discharged by an electrochemical reaction between the assemblies. The battery cells/pouches are tightly packed and hence it is important to disseminate heat generated from each battery cell/pouch and maintain temperature for appropriate charging and discharging of the battery packs.
[0004] Conventional designs of the battery pack include thermally conductive cooling members, coolant loops, cooling tubes etc. which either makes design of the battery packs and cells/pouches complex or increases the overall cost of the battery packs and cells/pouches. Hence there remains a need to provide an efficient battery pack and cell/pouch that maintains the temperature.
OBJECT OF THE INVENTION
[0005] The principal object of the embodiments herein is a battery pack with a unified cooling plate and thermal pads for temperature management.

[0006] Yet another object of the embodiments herein is to form a path for flowing a coolant from the cooling plate through each thermal pad of the plurality of thermal pads. The coolant from the cooling plate enters from one side of the thermal pad and comes out from other side of the thermal pad.
[0007] Yet another object of the embodiments herein is the thermal pads with marquise pattern or any intended pattern to generate a turbulent flow of the coolant.
SUMMARY OF THE INVENTION
[0008] In one aspect the object is satisfied by providing a battery pack for temperature management. The battery pack incudes a housing and a plurality of battery cells/pouches placed in the housing in which each battery pack comprising of battery cells/pouches and a separator between them. Further, the battery pack incudes a cooling plate placed at a bottom of the separator of each battery cell/pouch for temperature management. The cooling plate comprises a plurality of thermal pads sequentially arranged to form a path for flowing a coolant from the cooling plate through each thermal pad of the plurality of thermal pads.
[0009] In an embodiment, the coolant from the cooling plate enters from one side of the thermal pad and comes out from other side of the thermal pad.
[0010] In an embodiment, the plurality of thermal pads with marquise pattern or any intended pattern generate a turbulent flow of the coolant.
[0011] These and other aspects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating preferred embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the embodiments

herein without departing from the spirit thereof, and the embodiments herein include all such modifications.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The proposed battery pack and cell/pouch are illustrated in the accompanying drawings, throughout which like reference letters indicate corresponding parts in the various figures. The embodiments herein will be better understood from the following description with reference to the drawings, in which:
[0013] FIG. 1 illustrates a battery cells/pouch with separator, according to prior art;
[0014] FIG. 2 illustrates a battery pack, according to embodiments as disclosed
herein;
[0015] FIG. 3 illustrates a cooling plate with thermal pads for temperature
management, according to embodiments as disclosed herein;
[0016] FIG. 4a illustrates a front view of the cooling plate with the thermal pads,
according to embodiments as disclosed herein;
[0017] FIG. 4b illustrates a top view of the cooling plate with the thermal pads,
according to embodiments as disclosed herein;
[0018] FIGS. 5a and 5b illustrates a section view of the cooling plate with the
thermal pads in which the thermal pads have marquise pattern or any intended
pattern, according to embodiments as disclosed herein;
[0019] FIG. 6a illustrates a section view of the cooling plate with the thermal pads
without coolant, according to embodiments as disclosed herein; and
[0020] FIG. 6b illustrates a section view of the cooling plate with the thermal pads
with coolant, according to embodiments as disclosed herein.
DETAILED DESCRIPTION OF THE INVENTION
[0021] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments

that are illustrated in the accompanying drawings and detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. Also, the various embodiments described herein are not necessarily mutually exclusive, as some embodiments can be combined with one or more other embodiments to form new embodiments. The term “or” as used herein, refers to a non-exclusive or, unless otherwise indicated. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein can be practiced and to further enable those skilled in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
[0022] Referring now to the drawings, and more particularly to FIGS. 2 through 6, where similar reference characters denote corresponding features consistently throughout the figures, there are shown preferred embodiments.
[0023] FIG. 2 illustrates a battery pack (5) for temperature management, according to embodiments as disclosed herein. The battery pack (5) includes a housing (6), a plurality of battery cells/pouches with separator (4) placed in the housing (6), and a cooling plate (7). Each of the battery cells/pouches with separator (4) includes battery cell/pouch “A” (1), battery cell/pouch “B” (2) and a separator (3) between the battery cell/pouch “A” (1) and the battery cell/pouch “B” (2). The cooling plate (7) are placed at a bottom of the battery cells/pouches with separator (4) for temperature management.
[0024] In an embodiment, the battery cells/pouches with separator (4) for temperature management is proposed in which the battery cells/pouches with separator (4) includes battery cell/pouch “A” (1), battery cell/pouch “B” (2) and a separator (3) between the battery cell/pouch “A” (1) and the battery cell/pouch “B” (2), and a cooling plate (7) placed at a bottom of the separator (3) of the battery cells/pouches with separator (4) for temperature management.

[0025] FIG. 3 illustrates a cooling plate (7) with the thermal pads (8) for temperature management, according to embodiments as disclosed herein. The cooling plate includes a plurality of thermal pads (8) sequentially arranged to form a path for flowing a coolant from the cooling plate (7) through each of the thermal pad. The coolant from the cooling plate (7) enters from one side of the thermal pad (8) and comes out from other side of the thermal pad (8).
[0026] FIG. 4a illustrates a front view of the cooling plate (7) with the thermal pads (8) have section A-A, B-B, and C-C for clarity in FIG. 5a and 5b, and FIG. 4b illustrates a top view of the cooling plate (7) with the thermal pads (8), according to embodiments as disclosed herein. As shown in the FIGS. 4a-4b, a channels are formed to allow the flow of the coolant through the thermal pads (8).
[0027] FIGS. 5a and 5b illustrates a section view of the cooling plate (7) with the thermal pads (8) in which the thermal pads (8) have marquise pattern or any intended pattern (11), according to embodiments as disclosed herein. As shown in the FIG. 5a and 5b, the proposed design allows a cold side (9) and a hot side (10) are alternate placement of the cold side (9) and the hot side (10) that allow quick temperature management in the battery pack (5). In an embodiment, the coolant from the cooling plate (7) enters from one cold side (9) of the thermal pad (8) and comes out from the hot side (10) of the thermal pad (8).
[0028] As shown in the FIG. 5a and 5b, the plurality of thermal pads (8) with marquise pattern or any intended pattern (11) to generate a turbulent flow of the coolant. The marquise pattern or any intended pattern (11) allows efficient mechanisms for quick temperature management in the battery pack (5).
[0029] FIG. 6a illustrates a section view of the cooling plate (7) with the thermal pads (8) without coolant and FIG. 6b illustrates a section view of the cooling plate (7) with the thermal pads (8) with coolant, according to embodiments as disclosed herein. The proposed design of the battery pack (5) allow 3 sided cooling and/or

heating to battery cell/pouch “A” (1) and battery cell/pouch “B” (2). As shown in the FIG. 6b, when the coolant is passed, a 3 sided cooling and/or heating is achieved for quick temperature management. A flip-flop flow (alternate cold and hot side (9, 10) of the coolant in the thermal pads (8) are achieved for quick management of temperature.
[0030] The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
[0031] List to reference numerals:

Sr. No. Description
1 Battery cell/pouch “A”
2 Battery cell/pouch “B”
3 Separator
4 battery cells/pouches with separator
5 battery pack
6 Housing
7 cooling plate
8 thermal pad
9 cold side
10 hot side
11 marquise pattern or any intended pattern

WE CLAIM:
1. A battery pack (5) for temperature management, wherein the battery pack (5)
comprises:
a housing (6);
a plurality of battery cells/pouches with separator (4) placed in the housing (6), wherein each battery cells/pouches with separator (4) comprising of battery cell/pouch “A” (1), battery cell/pouch “B” (2) and a separator (3) between battery cell/pouch “A” (1) and battery cell/pouch “B” (2);
characterized in that:
a cooling plate (7) placed at a bottom of the separator (3) of each battery cells/pouches with separator (4) for temperature management, wherein the cooling plate comprises a plurality of thermal pads (8) sequentially arranged to form a path for flowing a coolant from the cooling plate (7) through each thermal pad of the plurality of thermal pads (8).
2. The battery pack (5) as claimed in claim 1, wherein the coolant from the cooling plate (7) enters from one side of the thermal pad (8) and comes out from other side of the thermal pad (8).
3. The battery pack (5) as claimed in claim 1, wherein the plurality of thermal pads (8) have marquise pattern or any intended pattern (11) to generate a turbulent flow of the coolant.
4. A battery cells/pouches with separator (4) for temperature management, wherein the battery cells/pouches with separator (4) comprises:
battery cell/pouch “A” (1), battery cell/pouch “B” (2) and a separator (3) between battery cell/pouch “A” (1) and battery cell/pouch “B” (2);
characterized in that:
a cooling plate (7) placed at a bottom of the separator (3) for temperature management, wherein the cooling plate comprises a plurality of thermal pads (8)

sequentially arranged to form a path for flowing a coolant from the cooling plate (7) through each thermal pad of the plurality of thermal pads (8).
5. The battery pack (5) as claimed in claim 1, wherein the coolant from the cooling plate (7) enters from one side of the thermal pad (8) and comes out from other side of the thermal pad (8).
6. The battery pack (5) as claimed in claim 1, wherein the plurality of thermal pads (8) are arranged in a flip-flop manner for quick temperature management.