CN116845467A - Traction battery pack with cell-pack battery system - Google Patents

Traction battery pack with cell-pack battery system Download PDF

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Publication number
CN116845467A
CN116845467A CN202310263474.4A CN202310263474A CN116845467A CN 116845467 A CN116845467 A CN 116845467A CN 202310263474 A CN202310263474 A CN 202310263474A CN 116845467 A CN116845467 A CN 116845467A
Authority
CN
China
Prior art keywords
cell
battery pack
traction battery
cell stack
slug
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310263474.4A
Other languages
Chinese (zh)
Inventor
帕特里克·丹尼尔·马圭尔
张哲春
贾森·C·马尔卡思
K·赛勒
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ford Global Technologies LLC
Original Assignee
Ford Global Technologies LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US17/893,548 external-priority patent/US20230302887A1/en
Application filed by Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Publication of CN116845467A publication Critical patent/CN116845467A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The present disclosure provides a traction battery pack having a cell-battery pack battery system. Traction battery packs including a cell-pack battery system are disclosed. The cell stack/cell matrix of the cell-pack battery system may be positioned within irregularly shaped housing trays that pull the battery packs. The slug may be positioned at an interface between the cell stack/cell matrix and the irregularly shaped inner surface of the housing tray. The slug may be configured to facilitate insertion of the cell stack/cell matrix into the housing tray, transfer of compressive loads from the housing tray walls to the cell stack/cell matrix, resist battery cell compressive loads, and the like.

Description

Traction battery pack with cell-pack battery system
Cross Reference to Related Applications
This disclosure claims priority from U.S. provisional application No. 63/322,766, filed on day 23 of 3.2022, which is incorporated herein by reference.
Technical Field
The present disclosure relates generally to traction battery packs, and more particularly to traction battery packs that include a cell-pack battery system housed within an irregularly shaped housing assembly.
Background
An electrically powered vehicle includes a powertrain having one or more electric machines. Alternatively or in addition to the internal combustion engine, the electric machine may drive an electrically powered vehicle. The traction battery pack may power the motor and other electrical loads of the vehicle.
Conventional traction battery packs include a battery cell stack called a battery array. The battery array includes various array support structures (e.g., array frames, spacers, rails, walls, end plates, ties, etc.) arranged to group and support battery cells in a plurality of individual cells within a traction battery pack housing.
Disclosure of Invention
Traction battery packs according to exemplary aspects of the present disclosure include, among other things, a housing assembly including a housing tray. The housing tray includes an irregularly shaped inner surface. A cell-to-battery pack system is housed within the housing assembly and includes a cell stack. An slug establishes an interface between the irregularly shaped inner surface and the cell stack.
In another non-limiting embodiment of the aforementioned traction battery pack, the slug is secured to the battery cells at the longitudinal extent of the cell stack.
In another non-limiting embodiment of any of the foregoing traction battery packs, the cell stacks establish a cell row of a cell matrix.
In another non-limiting embodiment of any of the foregoing traction battery packs, the housing tray provides a cell compression opening for compressing the cell stack.
In another non-limiting embodiment of any of the foregoing traction battery packs, the irregularly shaped inner surface establishes a portion of the cell compression opening.
In another non-limiting embodiment of any of the foregoing traction battery packs, the slug includes a first side that interfaces with the irregularly shaped inner surface and a second side that interfaces with the cell stack.
In another non-limiting embodiment of any of the foregoing traction battery packs, the first side surface includes a first profile and the second side surface includes a different second profile.
In another non-limiting embodiment of any of the foregoing traction battery packs, the first profile is curved and the second profile is flat.
In another non-limiting embodiment of any of the foregoing traction battery packs, an adhesive is disposed between the first side surface and the irregularly shaped inner surface, and further disposed between the second side surface and the cell stack.
In another non-limiting embodiment of any of the foregoing traction battery packs, the irregularly shaped inner surface includes a curved profile and is connected between the flat portions of the housing tray.
In another non-limiting embodiment of any of the foregoing traction battery packs, the slug is a polymer-based component.
In another non-limiting embodiment of any of the foregoing traction battery packs, the polymer-based component comprises a hollow core polymer having structural ribs.
A method according to another exemplary aspect of the present disclosure includes, among other things, positioning an slug between an irregular inner surface of a housing tray of a traction battery pack and a cell stack of a cell-pack battery system of the traction battery pack.
In another non-limiting embodiment of the foregoing method, the slug is positioned between the irregularly shaped inner surface and the cell of the cell stack.
In another non-limiting embodiment of any of the foregoing methods, the cell stack is part of a cell matrix of the cell-battery pack cell system.
In another non-limiting embodiment of any of the foregoing methods, the slug is secured to both the irregularly shaped inner surface and the battery cell by an adhesive.
In another non-limiting embodiment of any of the foregoing methods, the slug includes a first side that interfaces with the irregularly shaped inner surface and a second side that interfaces with the cell stack.
In another non-limiting embodiment of any of the foregoing methods, the slug includes a first end face that interfaces with a planar portion of the housing tray and a second end face that interfaces with the cell stack or a second cell stack.
In another non-limiting embodiment of any of the foregoing methods, the first side surface comprises a first contour and the second side surface comprises a different second contour.
In another non-limiting embodiment of any of the foregoing methods, the first profile is curved and the second profile is flat.
The embodiments, examples and alternatives of the foregoing paragraphs, claims or the following description and drawings (including any of their various aspects or respective individual features) may be employed independently or in any combination. Features described in connection with one embodiment are applicable to all embodiments unless such features are incompatible.
Various features and advantages of this disclosure will become apparent to those skilled in the art from the following detailed description. The drawings that accompany the detailed description can be briefly described as follows.
Drawings
Fig. 1 schematically shows an electrically powered vehicle.
Fig. 2 shows a traction battery pack of the motorized vehicle of fig. 1.
Fig. 3 illustrates a cell-pack battery system of the traction battery pack of fig. 2.
Fig. 4 is a partially exploded view of a traction battery pack having an irregularly shaped housing tray.
Fig. 5 is a partial perspective view of selected portions of the traction battery pack of fig. 4.
Fig. 6 is a top view of selected portions of the traction battery pack of fig. 4-5.
Detailed Description
The present disclosure details traction battery packs including a cell-battery pack battery system. The cell stack/cell matrix of the cell-pack battery system may be positioned within irregularly shaped housing trays that pull the battery packs. The slug may be positioned at an interface between the cell stack/cell matrix and the irregularly shaped inner surface of the housing tray. The slug may be configured to facilitate insertion of the cell stack/cell matrix into the housing tray, transfer of compressive loads from the housing tray walls to the cell stack/cell matrix, resist battery cell compressive loads, and the like. These and other features are discussed in more detail in the following paragraphs of this detailed description.
Fig. 1 schematically illustrates an electrically powered vehicle 10. The motorized vehicle 10 may include any type of motorized driveline. In an embodiment, the motorized vehicle 10 is a Battery Electric Vehicle (BEV). However, the concepts described herein are not limited to BEVs and are extendable to other motorized vehicles, including, but not limited to, hybrid Electric Vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), fuel cell vehicles, and the like. Thus, although not specifically shown in the exemplary embodiment, the motorized vehicle 10 may be equipped with an internal combustion engine that may be employed alone or in combination with other power sources to propel the motorized vehicle 10.
In an embodiment, the motorized vehicle 10 is an automobile. However, motorized vehicle 10 may alternatively be a pick-up truck, van, sport Utility Vehicle (SUV), or any other vehicle configuration. Although specific component relationships are shown in the drawings of the present disclosure, the illustrations are not intended to limit the disclosure. The placement and orientation of the various components of the motorized vehicle 10 are schematically illustrated and may vary within the scope of the present disclosure. Furthermore, the various figures attached to this disclosure are not necessarily drawn to scale, and some features may be exaggerated or minimized to emphasize certain details of particular components or systems.
In the illustrated embodiment, the motorized vehicle 10 is a pure electric vehicle propelled solely by electric power (such as by one or more electric machines 12) without the assistance of an internal combustion engine. The electric machine 12 may act as an electric motor, a generator, or both. The electric machine 12 receives electrical power and may convert the electrical power into torque for driving one or more drive wheels 14 of the motorized vehicle 10.
The voltage bus 16 may electrically couple the motor 12 to a traction battery pack 18. The traction battery pack 18 is capable of outputting electrical power to power the motor 12 and/or other electrical loads of the motorized vehicle 10.
The traction battery pack 18 may be secured to an underbody 22 of the motorized vehicle 10. However, it is within the scope of the present disclosure that traction battery pack 18 may be located elsewhere on electric vehicle 10.
Traction battery pack 18 is an exemplary motorized vehicle battery. Traction battery pack 18 may be a high voltage traction battery pack including a cell-pack battery system 20. Unlike conventional traction battery pack battery systems, the battery cell-battery pack battery system 20 incorporates battery cells or other energy storage devices without arranging the cells in separate arrays or modules. Thus, the cell-to-cell battery system 20 eliminates most, if not all, of the array support structures (e.g., array frames, spacers, stringers, walls, end plates, ties, etc.) necessary to group battery cells into arrays/modules. Further, the cell-to-battery pack battery system 20 may provide the overall voltage bus potential of the traction battery pack 18 with a single battery cell rather than a conventional battery system that requires multiple individual battery arrays/modules that must be connected together after being positioned within the battery housing to achieve the overall voltage potential.
Referring now to fig. 2 and 3, the traction battery pack 18 may include a housing assembly 24 arranged to house the battery cell-pack battery system 20. In an embodiment, the battery cell-pack battery system 20 includes a plurality of battery cells 26 held within an interior region 28 established by the housing assembly 24.
The battery cells 26 may supply electrical power to various components of the motorized vehicle 10. The battery cells 26 may be stacked side-by-side with respect to one another to construct a cell stack 30, and the cell stacks 30 may be positioned side-by-side in rows to provide a cell matrix 32.
In an embodiment, each cell stack 30 includes eight individual battery cells 26, and the cell matrix 32 includes four cell stacks 30 having a total of thirty-two battery cells 26. Providing a uniform number of battery cells 26 and a uniform number of cell stacks 30 may help support an efficient electrical bus arrangement. Although a particular number of battery cells 26 and cell stacks 30 are shown in the various figures of the present disclosure, the cell-to-cell pack battery system 20 of the traction battery pack 18 may include any number of battery cells 26 and any number of cell stacks 30. In other words, the present disclosure is not limited to the exemplary configurations shown in fig. 2 and 3.
In an embodiment, battery cell 26 is a prismatic lithium ion cell. However, battery cells having other geometries (cylindrical, soft pack, etc.) and/or chemistries (nickel-metal hydride, lead acid, etc.) may alternatively be utilized within the scope of the present disclosure.
The housing assembly 24 of the traction battery pack 18 may include a housing cover 34 and a housing tray 36. The housing cover 34 may be secured to the housing tray 36 to provide an interior region 28 for housing the battery cell-pack battery system 20.
The housing tray 36 may include a bottom plate 38 and a plurality of side walls 40 arranged relative to one another to provide a cell compression opening 42. The bottom panel 38 and the side walls 40 may be mechanically coupled to each other, such as by welding, for example.
During assembly of traction battery pack 18, housing cover 34 may be secured to housing tray 36 at interface 44 that substantially encloses interior region 28. In some embodiments, mechanical fasteners 46 may be used to secure the housing cover 34 to the housing tray 36, but other fastening methods (adhesion, etc.) may also be suitable.
The cell matrix 32 of the cell-pack battery system 20 may be positioned within the cell compression openings 42 provided by the housing tray 36. The exemplary housing tray 36 is depicted as including a single cell compression opening 42, however, it should be understood that the present disclosure extends to structural assemblies that provide one or more cell compression openings. The housing cover 34 may cover the cell matrix 32 within the cell compression openings 42 to enclose the battery cells 26 on substantially all sides. Once fully assembled and positioned relative to the housing tray 36, the cell matrix 32 can establish a single cell that can provide the overall voltage bus potential of the traction battery pack 18.
The housing tray 36 may compress and retain the cell matrix 32 when the cell matrix 32 is received within the cell compression opening 42. In an embodiment, the side walls 40 of the housing tray 36 apply a force to the cell matrix 32 when the cell matrix 32 is positioned within the cell compression openings 42.
In an embodiment, to insert the cell matrix 32 into the cell compression opening 42, the cell matrix 32 may be compressed first and then moved into place in the cell compression opening 42 when compressed. A compressive force F may be applied to an opposite end of one of the cell stacks 30 C . Compression force F C Essentially compressing the battery cells 26 within the cell stack 30, thereby compressing the cell stack 30 and each battery cell 26 to a reduced thickness. When the compression force F C When applied to the cell stack 30, the cell stack 30 may be moved by a downward force F D Inserted into the corresponding cell compression openings 42. Downward force F D May be applied directly to one or more of the battery cells 26.
Although the term "downward" is used herein to describe a downward force F D It should be understood that the term "downward" is also used herein to refer to all forces tending to press the cell stack 30 into the cell compression opening 42. In particular, the term "downward"means substantially perpendicular to the compressive force F C Whether or not the force is truly in a "downward" direction. For example, the present disclosure extends to cell stacks that are compressed laterally and inserted into cell compression openings.
The cell stack 30 may be individually compressed and inserted into the cell compression opening 42. In another embodiment, the entire cell matrix 32 is compressed and inserted into the cell compression openings 42. As schematically shown in fig. 3, in such an embodiment, an additional compressive force F X The cell stacks 30 may be compressed together to insert the cell matrix 32 into the cell compression openings 42. Compression force F X Generally perpendicular to the compressive force F C . Compression force F X Can be matched with the compression force F C Applied together. Force F can then be applied D To move the entire cell matrix 32 into the cell compression openings 42.
In an embodiment, the entire perimeter of the cell compression opening 42 is defined by the side walls 40 of the housing tray 36. The sidewalls 40 may apply compressive force to the battery cells 26 around the entire perimeter of the cell matrix 32. Thus, the sidewalls 40 may serve as a rigid ring-like structure that compresses and tightly holds the cell matrix 32.
The above-described configuration is considered a cell-to-cell pack type of battery pack that is different from conventional battery pack types that include a housing holding an array of battery cells that are enclosed by an array support structure that is spaced apart from the walls of the battery housing, and wherein the battery housing does not apply a compressive force to any of the battery cells. The cell-pack type battery packs described herein also eliminate the rigid cross members that are typically secured to the housing tray of a conventional traction battery pack to provide mounting points for securing the battery array and housing cover.
The cell-to-battery pack battery system 20 may also include one or more cell row separators 48. In an embodiment, one cell row separator 48 is positioned between each pair of adjacent cell stacks 30 of the cell matrix 32. In other embodiments, two cell row dividers 48 are provided for each cell stack 30. However, the total number of cell row separators 48 disposed within the cell-to-cell battery system 20 is not intended to limit the present disclosure.
Fig. 4, 5 and 6 (with continued reference to fig. 1-3) illustrate exemplary designs of the housing tray 36 of the traction battery pack 18. Portions of the cell matrix 32 are shown relative to the housing tray 36 in fig. 6, but have been removed in fig. 4 and 5 for clarity.
The housing tray 36 may include an irregular shape and thus may not exhibit a completely rectangular profile, or a rectangular profile that neatly accommodates the sum of the battery cells 26. For example, one or more of the side walls 40 of the housing tray 36 may include an irregularly shaped inner surface 50. Each irregularly shaped inner surface 50 may establish a portion of the cell compression opening 42 of the housing tray 36.
Each irregularly shaped inner surface 50 may include a non-planar or curved profile and may be connected between planar portions 52 of side walls 40. The flat portion 52 includes a non-curved or flat profile. In the illustrated embodiment, each irregularly shaped inner surface 50 is disposed adjacent a corner 54 of the housing tray 36 and establishes a tapered profile of the housing tray 36. The tapered profile may connect the longitudinally extending side walls 40-LON of the housing tray 36 to the laterally extending side walls 40-LAT of the housing tray 36. However, it is within the scope of the present disclosure that the housing tray 36 may include other irregular shapes.
Due to their irregular profile, the irregularly shaped inner surfaces 50 do not extend parallel to the battery cells 26 located at the longitudinal extent of the cell stack 30/cell matrix 32 (see, e.g., fig. 6). This can make it challenging to support the cell stack 30/cell matrix 32 relative to the housing tray 36. Thus, the traction battery pack 18 may include one or more inserts 56 for establishing an interface that "squares" the irregularly shaped inner surface 50 relative to the cell stack 30/cell matrix 32. Among other benefits, the slug 56 may facilitate insertion of the cell stack 30/cell matrix 32 into the cell compression opening 42 of the housing tray 36, and may further facilitate transfer of compressive loads applied by the cell compression opening 42 to the cell matrix 32. The functionality provided by the slug 56 described herein may be particularly beneficial for traction battery packs that include cell-pack type battery systems, because the array support structure conventionally provided within the battery array has been largely eliminated from the cell-pack battery system 20, and the rigid cross members conventionally provided to establish mounting points for securing the battery cell groups have been eliminated from the housing tray 36.
In the exemplary embodiment, two inserts 56 are provided within traction battery pack 18. However, depending on the actual shape of the shell tray 36, a greater or lesser number of inserts 56 may be provided within the scope of the present disclosure.
The slug 56 may include a first side 58, a second side 60, and first and second end surfaces 62, 64 connected between the first and second sides 58, 60. The first side 58 may include a first profile and the second side 60 may include a second, different profile. The first profile of the first side 58 may be configured to match the profile of the irregularly shaped inner surface 50 of the housing tray 36 and the second profile of the second side 60 may be configured to match the profile of one or more battery cells 26 of the cell stack 30/cell matrix 32. Thus, in the exemplary embodiment, first side 58 includes a curved profile and second side 60 includes a substantially flat profile.
The first end face 62 and the second end face 64 may also each include a substantially flat profile. When the slug 56 is positioned between the housing tray 36 and the cell stack 30/cell matrix, the first end face 62 may interface with the side walls 40-LAT of the housing tray 36 and the second end face 64 may interface with one or more battery cells 26 of additional cell stacks 30 of the cell matrix 32 (see, e.g., fig. 6).
The slug 56 may be secured in place by an adhesive 66 (shown schematically in fig. 6). For example, the adhesive 66 may be applied between the first side 58 of the slug 56 and the irregularly shaped inner surface 50 of the housing tray 36, and may further be applied between the second side 60 of the slug 56 and the end face of one or more of the battery cells 26 of the cell stack 30/cell matrix 32. Once cured, the adhesive 66 may hold the slug 56 in place and increase the rigidity of the cell-to-battery pack system 20. The adhesive 66 may be a structural adhesive such as an epoxy or any other suitable adhesive. In other embodiments, the adhesive 66 may include one or more portions of double-sided tape.
The slug 56 may be a polymer-based component. For example, the slug 56 may be constructed of a hollow core polymer that includes structural ribs adapted to resist the cell expansion load applied by the cell 26 of the cell stack 30/cell matrix 32. Exemplary materials include, but are not limited to, thermoset materials (e.g., sheet molding compounds, bulk molding compounds, etc.) or fiber reinforced thermoplastics (e.g., polyamides with glass fiber fillers). In other embodiments, the slug 56 may be formed from a metal part, such as a sheet metal stamping, that is added to the interior of the tray structure and welded to the tray structure to square a non-square or irregular surface.
An example traction battery pack of the present disclosure includes an irregularly shaped housing, and thus provides features (e.g., inserts) that allow the irregularly shaped surface of the housing to be "squared" with respect to the cell stack/cell matrix received therein. The slug may provide a solution to various assembly complexities that may occur due to the elimination of many array support structures and tray rigid cross members associated with conventional traction battery packs.
Although various non-limiting embodiments are shown with specific components or steps, embodiments of the present disclosure are not limited to these specific combinations. Some components or features from any of the non-limiting embodiments may be used in combination with features or components from any of the other non-limiting embodiments.
It should be understood that the same reference numerals indicate corresponding or analogous elements throughout the several views. It should be understood that while particular component arrangements are disclosed and illustrated in the exemplary embodiments, other arrangements may benefit from the teachings of this disclosure.
The above description should be construed as illustrative and not in any limiting sense. Those of ordinary skill in the art will appreciate that some modifications may occur within the scope of the present disclosure. For these reasons, the following claims should be studied to determine the true scope and content of this disclosure.

Claims (15)

1. A traction battery pack, comprising:
a housing assembly including a housing tray,
wherein the housing tray includes an irregularly shaped inner surface;
a cell-to-cell battery system housed within the housing assembly and including a cell stack; and
an slug establishing an interface between the irregularly shaped inner surface and the cell stack.
2. The traction battery pack of claim 1, wherein the slug is secured to battery cells located at a longitudinal extent of the cell stack, and optionally wherein the cell stack establishes a cell row of a cell matrix.
3. The traction battery pack of claim 1 or 2, wherein the housing tray provides a cell compression opening for compressing the cell stack.
4. The traction battery pack of claim 3, wherein the irregularly shaped inner surface establishes a portion of the cell compression opening.
5. The traction battery pack of any one of the preceding claims, wherein the slug includes a first side that interfaces with the irregularly shaped inner surface and a second side that interfaces with the cell stack.
6. The traction battery pack of claim 5, wherein the first side surface includes a first profile and the second side surface includes a second, different profile.
7. The traction battery pack of claim 6, wherein the first profile is curved and the second profile is flat.
8. The traction battery pack of claim 7, comprising an adhesive disposed between the first side surface and the irregularly shaped inner surface, and further disposed between the second side surface and the cell stack.
9. The traction battery pack of any one of the preceding claims, wherein the irregularly shaped inner surface includes a curved profile and is connected between planar portions of the housing tray.
10. The traction battery pack of any one of the preceding claims, wherein the slug is a polymer-based component, and optionally wherein the polymer-based component comprises a hollow core polymer with structural ribs.
11. A method, comprising:
the slug is positioned between an irregular inner surface of a housing tray of a traction battery pack and a cell stack of a cell-pack battery system of the traction battery pack.
12. The method of claim 11, wherein the slug is positioned between the irregularly shaped inner surface and a cell of the cell stack, and optionally wherein the cell stack is a cell matrix of the cell-battery pack cell system, and further optionally wherein the slug is secured to both the irregularly shaped inner surface and the cell by an adhesive.
13. The method of claim 11 or 12, wherein the slug includes a first side that interfaces with the irregularly shaped inner surface and a second side that interfaces with the cell stack.
14. The method of claim 13, wherein the slug includes a first end face that interfaces with a planar portion of the housing tray and a second end face that interfaces with the cell stack or a second cell stack.
15. The method of claim 13, wherein the first side surface comprises a first profile and the second side surface comprises a different second profile, and optionally wherein the first profile is curved and the second profile is flat.
CN202310263474.4A 2022-03-23 2023-03-17 Traction battery pack with cell-pack battery system Pending CN116845467A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US63/322,766 2022-03-23
US17/893,548 US20230302887A1 (en) 2022-03-23 2022-08-23 Traction battery packs with cell-to-pack battery systems housed within irregularly shaped enclosures
US17/893,548 2022-08-23

Publications (1)

Publication Number Publication Date
CN116845467A true CN116845467A (en) 2023-10-03

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Application Number Title Priority Date Filing Date
CN202310263474.4A Pending CN116845467A (en) 2022-03-23 2023-03-17 Traction battery pack with cell-pack battery system

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CN (1) CN116845467A (en)

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