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WO2019118849A1 - Ensemble et dispositif de retenue pour batterie - Google Patents

Ensemble et dispositif de retenue pour batterie Download PDF

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Publication number
WO2019118849A1
WO2019118849A1 PCT/US2018/065697 US2018065697W WO2019118849A1 WO 2019118849 A1 WO2019118849 A1 WO 2019118849A1 US 2018065697 W US2018065697 W US 2018065697W WO 2019118849 A1 WO2019118849 A1 WO 2019118849A1
Authority
WO
WIPO (PCT)
Prior art keywords
battery cell
toothed
teeth
hold
cell housing
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.)
Ceased
Application number
PCT/US2018/065697
Other languages
English (en)
Inventor
Ken Nakayama
Jason D. Fuhr
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.)
Johnson Controls Technology Co
Original Assignee
Johnson Controls Technology Co
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
Application filed by Johnson Controls Technology Co filed Critical Johnson Controls Technology Co
Publication of WO2019118849A1 publication Critical patent/WO2019118849A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H01M50/291—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 characterised by their shape
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • This disclosure relates to a hold-down device and assembly for securing one or more battery cells within a battery cell housing and, in particular, to a hold-down assembly that secures and stabilizes one or more battery cells within a battery cell housing while reducing gaps between the walls of the battery cell housing and the battery cells within.
  • the chemical reactions within the battery cell may cause an increase in temperature and swelling of the battery cell.
  • charge/discharge cycles may cause the side walls of a prismatic battery cell to bow or expand, which can reduce battery life.
  • Some currently known battery modules include a housing containing a plurality of prismatic battery cells therein. During assembly of the battery module, the prismatic battery cells are arranged within the housing such that the broad side walls of adjacent battery cells are next to each other. This may be referred to as a battery cell stack.
  • a currently known battery cell stack 10 including a plurality of battery cells 12 within a battery cell housing 14 is shown in FIG. 1 (these collectively may be referred to as a battery module).
  • the battery cell housing 14 must be designed (that is, sized and configured) to include a gap 16 between the battery cell stack 10 and at least one of the internal walls of the battery cell housing 14 for assembly.
  • the size of the gap(s) 16 depends on such factors as the thickness of the individual battery cells 12 and/or of the stack 10 as a whole (which may depend, at least in part, on the temperature, aging, and/or shelf life of the battery cells 12, and may fluctuate over time with use), the internal dimensions of the battery cell housing 14 as molded, or the like.
  • thermal pads 18 may be used within the battery cell housing 14.
  • the thermal pad(s) 18 must be thicker, which can increase manufacturing cost and reduce thermal conductivity.
  • battery cells 12 often have non-uniform contact with the bottom of the inside of the battery cell housing 14, further reducing thermal exchange between the battery cells 12 and the thermal pad(s) 18.
  • the battery cells 12 must be secured and stabilized within the battery cell housing 14 to prevent damage to the battery cells 12 by vibration, shock, and/or abrasion and to maintain contact between the battery cells 12 and the thermal pad(s) 18.
  • battery cell housings 14 may reduce battery cell swelling and prolong battery cell life.
  • devices such as foam and/or springs (not shown) are used to keep the battery cells 12 in place. However, these devices lose their effectiveness over time and cannot provide uniform compression of the battery cell stack 10 and/or individual battery cells 12 due to gap variation.
  • Other currently known battery cell housings 14 include devices such as smooth sided wedges (not shown) between the battery cell stack 10 and one or more interior walls of the battery cell housing 14.
  • a hold-down device for use in a battery cell housing includes a wedge-shaped body including a first end and a second end opposite the first end, a planar surface between the first end and the second end, and a toothed surface between the first end and the second end and opposite the planar surface, the toothed surface having a plurality of teeth.
  • the wedge-shaped body is tapered from the first end to the second end.
  • the first end is oriented at a right angle to the planar surface.
  • the battery cell housing includes a toothed surface having a plurality of teeth, the plurality of teeth of the toothed surface of the wedge-shaped body being lockingly engageable with the plurality of teeth of the toothed surface of the battery cell housing to prevent movement of the hold-down device.
  • the hold-down device is insertable into a gap between the battery cell housing and a battery cell stack within the battery cell housing.
  • a battery module includes a battery cell housing including a plurality of interior surfaces that define an interior chamber, at least one of the interior surfaces being a toothed surface that includes a plurality of teeth, and a battery cell stack within the interior chamber.
  • the battery cell stack includes a plurality of battery cells and is located a distance from the toothed surface of the battery cell housing.
  • the battery module also includes a hold-down device located between the toothed surface of the battery cell housing and the battery cell stack, the hold-down device including a wedge-shaped body.
  • the wedge- shaped body has a first end and a second end opposite the first end, the wedge-shaped body being tapered from the first end to the second end, a planar surface between the first end and the second end, the planar surface being in contact with at least a portion of the battery cell stack, and a toothed surface between the first end and the second end and opposite the planar surface, the toothed surface being in contact with the toothed surface of the battery cell housing and having a plurality of teeth that are lockingly engageable with the plurality of teeth on the toothed surface of the battery cell housing.
  • the first end is oriented at a right angle to the planar surface and the toothed surface of the wedge-shaped body is oriented at an acute angle to the first end.
  • the toothed surface of the battery cell housing is oriented at the same acute angle to the first end of the wedge-shaped body as the toothed surface of the wedge-shaped body.
  • a hold-down assembly for use with a battery cell includes a stabilization plate including a planar central portion having a first edge and a second edge opposite the first edge, the planar central portion positionable across all of the plurality of battery cells, a first toothed element at the first edge, and a second toothed element at the second edge.
  • the hold-down assembly further includes a first adjustable toothed element and a second adjustable toothed element.
  • the first toothed element includes a first plurality of teeth
  • the second toothed element includes a second plurality of teeth
  • the first adjustable toothed element includes a third plurality of teeth
  • the second adjustable toothed elements includes a fourth plurality of teeth, the first plurality of teeth being lockingly engageable with the third plurality of teeth and the second plurality of teeth being lockingly engageable with the fourth plurality of teeth.
  • the planar central portion lies in a plane, at least a portion of each of the first and second toothed elements extending from the planar central portion in a direction that is orthogonal to the plane in which the planar central portion lies.
  • each of the first and second adjustable toothed elements is movingly couplable to the battery cell housing such that each of the first and second adjustable toothed elements is linearly movable in a direction that is orthogonal to the plane in which the planar central portion lies.
  • each of the first and second adjustable toothed elements is linearly movable in a direction that is parallel to the plane in which the planar central portion lies.
  • a battery module includes a battery cell housing including a plurality of interior walls that define an interior chamber, the plurality of interior walls including a first interior wall and a second interior wall opposite the first interior wall and a battery cell stack within the interior chamber, the battery cell stack including a plurality of battery cells.
  • the battery module also includes: a hold-down assembly including a stabilization plate having a planar central portion, a first edge, and a second edge opposite the first edge, the planar central portion of the stabilization plate being positionable within the battery cell housing across each of the plurality of battery cells and lying in a plane; a first plurality of toothed elements, each of the first plurality of toothed elements being at the first edge of the stabilization plate and including a first plurality of teeth; a second plurality of toothed elements, each of the second plurality of toothed elements being at the second edge of the stabilization plate and including a second plurality of teeth; a first plurality of adjustable toothed elements, each of the first plurality of adjustable toothed elements being movable within the battery cell housing and including a third plurality of teeth, the third plurality of teeth being lockingly engageable with the first plurality of teeth; and a second plurality of adjustable toothed elements, each of the second plurality of adjustable toothed elements being movable within a first
  • each of the first and second pluralities of adjustable toothed elements is movingly couplable to the battery cell housing.
  • the stabilization plate further has a first end and a second end opposite the first end, each of the first edge and the second edge being between the first end and the second end, each of the first end and the second end being couplable to the battery cell housing.
  • each of the first and second pluralities of adjustable toothed elements is linearly movable in a direction that is orthogonal to the plane in which a corresponding planar central portion lies.
  • each of the first and second pluralities of adjustable toothed elements is linearly movable in a direction that is parallel to the plane in which a corresponding planar central portion lies, each of the first and second pluralities of adjustable toothed elements being insertable between the stabilization plate and at least one of the plurality of battery cells.
  • each of the first and second pluralities of adjustable toothed elements includes a stop element that limits movement of each of the first and second pluralities of adjustable toothed elements toward a corresponding one of the plurality of battery cells.
  • FIG. 1 shows a cross-sectional view of a currently known battery cell stack within a battery cell housing, with a gap between the battery cell stack and the battery cell housing;
  • FIG. 2 shows a cross-sectional view of a hold-down device positioned between a portion of a battery cell housing and a battery cell stack;
  • FIG. 3 shows a perspective view of a hold-down device;
  • FIG. 4 shows a cross-sectional view of a battery cell stack within a battery cell housing and the hold-down device
  • FIG. 5 shows a cross-sectional view of a battery cell stack within a battery cell housing and a plurality of hold-down devices
  • FIG. 6 shows a schematic view of a plurality of hold down assemblies and a first embodiment of a stabilization plate within a battery cell housing and used with a plurality of battery cells;
  • FIG. 7 shows a top view of the plurality of hold down assemblies and a second embodiment of a stabilization plate within a battery cell housing and used with a plurality of battery cells;
  • FIG. 8 shows a cross-sectional view of a battery cell with a first embodiment of a hold-down assembly, the hold-down assembly being disengaged with a stabilization plate;
  • FIG. 9 shows a cross-sectional view of the battery cell with the first embodiment of a hold-down assembly of FIG. 8, the hold-down assembly being engaged with the stabilization plate;
  • FIG. 10 shows a cross-sectional view of a battery cell with a second embodiment of a hold-down assembly, the hold-down assembly being disengaged with a stabilization plate;
  • FIG. 11 shows a cross-sectional view of the battery cell and the second embodiment of a hold-down assembly of FIG. 10, the hold-down assembly being engaged with the stabilization plate.
  • relational terms such as“first” and“second,”“top” and“bottom,” and the like, may be used solely to distinguish one entity or element from another entity or element without necessarily requiring or implying any physical or logical relationship or order between such entities or elements.
  • the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the concepts described herein.
  • the singular forms“a”,“an” and“the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.
  • FIG. 2 a cross-sectional view of a hold-down device 20 positioned between a portion of a battery cell housing 22 and a battery cell stack 24 is shown in FIG. 2.
  • the hold-down device 20 is configured for use in a battery cell housing 22 (only a portion of the housing 22 is shown in FIG. 2), such as to secure and stabilize a battery cell stack 24 (for example, a battery cell stack 24 as shown in FIGS. 4 and 5) within an interior chamber 25 of the battery cell housing 22 and to reduce or eliminate gap(s) 26 between the battery cell stack 24 and one or more interior walls of the battery cell housing 22.
  • a battery cell stack 24 for example, a battery cell stack 24 as shown in FIGS. 4 and 5
  • the term“walls” includes side walls, the floor (or bottom wall), and the cover (or top wall opposite the bottom wall) of the battery cell housing 22.
  • the hold-down device 20 includes a wedge-shaped body 27, configured to be inserted into the battery cell housing 22 to a distance sufficient to secure and stabilize the battery cell stack 24, as discussed in greater detail below.
  • the wedge-shaped body 27 of the hold-down device 20 is shown in greater detail in FIG. 3.
  • the wedge-shaped body 27 includes a first end 28 and a second end 30 opposite the first end, with the wedge-shaped body 27 tapering from the first end 28 to the second end 30.
  • the wedge-shaped body 27 includes a planar surface 32 extending between the first end 28 and the second end 30, the planar surface 32 being configured to be in contact with and parallel to, or at least substantially parallel to, a side surface 34 of an adjacent battery cell 36 of the battery cell stack 24 when the hold-down device 20 is inserted into the battery cell housing 22.
  • the first end 28 is oriented at a right angle, or approximately a right angle (90°) to the planar surface 32.
  • the wedge-shaped body 27 further includes a toothed surface 38 having a plurality of teeth 40 that is located opposite the planar surface 32.
  • each of the plurality of teeth 40 is an elongate ridge that extends from one side of the wedge-shaped body 27 to the other (for example, as shown in FIG. 3).
  • the wedge-shaped body 27 is shaped like a right triangle, with the toothed surface 38 being the hypotenuse of the triangle and oriented at an acute angle to the first end 28.
  • the size and dimensions of the wedge-shaped body 27 are determined at least in part by the dimensions of the battery cell housing 22 and the battery cells 36 and/or battery cell stack 24.
  • the battery cell housing 22 includes a plurality of interior surfaces, at least one of which being a toothed surface 42 that includes a plurality of teeth 44.
  • the size, tooth pitch, and configuration of teeth 44 on the toothed surface 42 of the battery cell housing 22 correspond to the size, tooth pitch, and configuration of teeth 40 on the toothed surface 38 of the wedge-shaped body 27.
  • the toothed surface 42 within the battery cell housing 22 is slanted relative to the side surface 34 of the battery cell stack 24 at the same, or approximately the same, angle that the toothed surface 38 is slanted relative to the planar surface 32 of the wedge-shaped body 27 is.
  • the toothed surface 42 of the battery cell housing 22 is oriented at the same, or approximately the same, acute angle relative to the first end 28 of the wedge-shaped body 27 as the toothed surface 38 of the wedge-shaped body 27.
  • the teeth 40, 44 of the toothed surfaces 38, 42 are configured to be lockingly engaged with each other when the hold-down device 20 is inserted between the battery cell stack 24 and the toothed surface 42 of the battery cell housing 22.
  • the hold-down device 20 may further include one or more handles or projections coupled to the wedge-shaped body 27 for removing and/or repositioning the hold-down device 20.
  • the battery cells 36 are placed within the battery cell housing 22 to form the battery cell stack 24, such that the gap 26 is located between the battery cell stack 24 and the toothed surface 42.
  • the hold-down device 20 is then inserted into the gap 26, toward the floor 46 of the inside of the battery cell housing 22.
  • the distance the hold-down device 20 is inserted into the battery cell housing 22 depends at least in part on the size of the gap 26 between battery cell stack 24 and the toothed surface 42 of the battery cell housing 22.
  • the hold-down device 20 includes a wedge- shaped body 27, and the hold-down device 20 is inserted into the battery cell housing 22 with the second end 30 of the wedge-shaped body 27 leading.
  • the hold-down device 20 may be used to eliminate or reduce a gap 26 of any size. For example, the larger the gap 26, the longer the distance by which the hold-down device 20 is inserted into the battery cell housing 22.
  • the size, number, and configuration of the teeth 40, 44 on the toothed surfaces 38, 42 may be chosen such that the hold-down device 20 will remain in place, even in the occurrence of a higher load due to cell expansion forces within the battery cell 36 (and battery cell swelling, as a result), inertia acting upon the battery cell stack 24 during shock or vibration, and/or other factors.
  • Use of the hold-down device 20 may also allow for the use of thinner thermal pads between the battery cell stack 24 and/or battery cells 36 and the battery cell housing 22, which reduces cost and increases thermal conductivity of the thermal pads.
  • hold-down device 20 herein may also allow for manufacturing variation and tolerances in the construction of the battery cell and/or hold-down device.
  • one or more hold-down devices 20 may be used.
  • the battery cell stack 24, battery cell housing, and hold-down device(s) 20 are collectively referred to as a battery module 48.
  • the battery cell housing 22 includes one toothed surface 42 and one hold-down device 20 is used (for example, as shown in FIG. 4).
  • the battery cell housing 22 includes two toothed surfaces 42, such as at opposite ends of the battery cell housing 22, and two hold down devices 20 are used (for example, as shown in FIG. 5).
  • the battery cell housing 22 may include any number of toothed surfaces 42, and more than one hold-down device 20 may be used to engage with each toothed surface 42. It will further be understood that fewer hold-down devices 20 than toothed surfaces 42 may be used. Additionally, because the hold-down device 20 is configured to reduce or eliminate gap(s) 26 between the battery cell stack 24 and one or more interior walls (including, for example, the floor 46 and/or the cover) of the battery cell housing 22, it will be understood that one or more hold-down devices 20 may be inserted into the battery cell housing 22 at locations other than those shown. For example, one or more hold-down devices 20 may be inserted between the battery cell stack 24 and the cover and/or the floor 46 of the battery cell housing 22.
  • one or more gaps may be desirable for, among other things, permitting air circulation and cooling of the battery cell stack.
  • the hold-down device may have one or more channels or a pattern of channels for air flow.
  • a heat sink may be wedged within the gap along with the hold-down device(s) or in some examples the hold-down device may be formed of a material having heat-sink qualities, such as aluminum.
  • a hold-down assembly 50 used within a battery cell housing 52 are shown.
  • the hold-down assembly 50 is configured for use in a battery cell housing 52, such as to secure and stabilize a battery cell 54 therein and to reduce or eliminate gap(s) (not shown in FIG. 6) between the battery cell 54 and one or more interior walls of the battery cell housing 52.
  • a battery module 56 includes a hold-down assembly 50 having a stabilization plate 60 and a plurality of hold-down units 61 for each battery cell 54 in a battery cell stack 58.
  • a first embodiment of a stabilization plate 60 is shown in FIG. 6 and a second embodiment of a stabilization plate is shown in FIG. 7.
  • Each hold-down unit 61 is configured to lockingly engage with the stabilization plate 60.
  • the stabilization plate 60 is coupled to at least one inner wall of the battery cell housing 52 and, in one embodiment, is movingly coupled to the battery cell housing 52 such that the stabilization plate is vertically movable relative to the battery cell stack 58 over a limited, pre-determined distance.
  • the stabilization plate 60 is unattached from the battery cell housing 52, and instead is positioned on top of the battery cell stack 58.
  • the stabilization plate 60 includes a planar central portion 66 that extends over each of the battery cells 54 in the battery cell stack 58, between the terminals 64 of each battery cell 54.
  • FIG. 6 the stabilization plate 60 includes a planar central portion 66 that extends over each of the battery cells 54 in the battery cell stack 58, between the terminals 64 of each battery cell 54.
  • the stabilization plate 60 also includes a plurality of lateral planar portions 67 that each extend perpendicularly from the planar central portion 66.
  • the stabilization plate 60 further includes a first toothed element 68A at a first edge of the planar central portion 66, and a second toothed element 68B at a second edge of the planar central portion 66 opposite the first toothed element 68A.
  • Each hold-down unit 61 includes a first adjustable toothed element 70 A and a second adjustable toothed element 70B.
  • each adjustable toothed element 70A, 70B is movably coupled to an inner surface of the battery cell housing 52.
  • the battery cell housing 14 includes a plurality of interior walls, including a floor, a cover, and at least four interior walls 72 defining an interior chamber 74 of the battery cell housing 52, the interior walls including a first interior wall 72A and a second interior wall 72B opposite the first interior wall 72A, with the first adjustable toothed element 70 A being movably coupled to the first interior wall 72A and extending into the interior chamber 74 and the second adjustable toothed element 70B being movably coupled to the second interior wall 72B and extending into the interior chamber 74.
  • each adjustable toothed element 70A, 70B is spring-mounted to the battery cell housing 52, such that the adjustable toothed element 70A, 70B may be moved linearly with respect to the battery cell 54.
  • the adjustable toothed elements 70 A, 70B are linearly movable in a vertical direction along a distance that is orthogonal to, or at least substantially orthogonal to, the plane in which the planar central portion 66 of the stabilization plate 60 lies.
  • the toothed elements 68A, 68B and the adjustable toothed elements 70 A, 70B include a complementary number, size, and configuration of teeth 76A, 76B, 78A, 78B, respectively, such that the teeth 78A of the first adjustable toothed element 70A are configured to be lockingly engaged with the teeth 76 A of the first toothed element 68A of the stabilization plate 60 and the teeth 78B of the second adjustable toothed element 70B are configured to be lockingly engaged with the teeth 76B of the second toothed element 68B of the stabilization plate 60.
  • each adjustable toothed element 70A, 70B includes an arm 80 that extends from the inner surface of the battery cell housing 52 toward the corresponding toothed element 68A, 68B of the stabilization plate 60, thereby positioning the teeth 76 of the toothed elements 68 A, 68B and the teeth 78 of the adjustable toothed elements 70 A, 70B such that they may be engaged with each other.
  • FIGS. 1-10 In the first embodiment shown in FIGS.
  • the toothed elements 68A, 68B extend from the planar central portion 66 in a direction that is orthogonal to, or at least substantially orthogonal to, the plane in which the planar central portion 66 lies.
  • the teeth 76 are located on the outer surfaces of the toothed elements 68A, 68B (that is, the surfaces facing in opposite directions from each other).
  • the adjustable toothed elements 70A, 70B include an inner surface on which the teeth 78 are located, which inner surface extends in a direction that is orthogonal to, or at least substantially orthogonal to, the plane in which the planar central portion 66 lies, such that the teeth 76, 78 may be engaged with each other.
  • the pressure of the stabilization plate 60 on each battery cell 54 stabilizes and provides a pre-loading compression force on the battery cell stack 58, which in some examples may provide for approximately uniform compression. Additionally, the stabilization plate 60 helps transfer the hold down force to the battery cell housing 52.
  • the stabilization plate 60 is coupled to at least one interior wall 72 of the battery cell housing 52 and the adjustable toothed elements 70 A, 70B are unattached from, or not coupled to, the battery cell housing 52 and are linearly movable in a horizontal direction along a distance that is parallel to, or at least substantially parallel to, the plane in which the planar central portion 66 of the stabilization plate 60 lies.
  • the adjustable toothed elements 70A, 70B are inserted between the stabilization plate 60 and the battery cell stack 58 (for example, between the stabilization plate 60 and each of the battery cells 54) to reduce or eliminate gap(s) between the battery cell stack 58 and the stabilization plate 60 and/or the interior walls 72 of the battery cell housing 52.
  • the stabilization plate 60 of the second embodiment shown in FIGS. 10 and 11 includes a plurality of toothed elements 68. Toothed elements being on opposite edges of the stabilization plate from each other are referred to in the figures as toothed element 68A and 68B.
  • Each toothed element 68A, 68B includes a first portion 82 that extends in a direction that is orthogonal to, or at least substantially orthogonal to, the plane in which the planar central portion 66 lies, and a second portion 84 that extends from the first portion 82 in a direction that is parallel to, or at least substantially parallel to, the plane in which the planar central portion 66 lies.
  • the second portion includes a slanted lower surface (that is, the surface that is closer to the battery cell 54) on which the teeth 76 are located.
  • each adjustable toothed element 70A, 70B includes a slanted upper surface (that is, the surface that is farther from the battery cell 54) on which the teeth 78 are located.
  • the slanted surfaces of the toothed elements 60 A, 60B and the slanted surfaces of the adjustable toothed elements 70A, 70B are configured such that the teeth 76, 78 are in positioned to engage each other when the battery cell stack 58 is secured and stabilized within the battery cell housing 52.
  • the adjustable toothed elements 70A, 70B will move linearly (horizontally) along the directions shown in FIG.
  • the adjustable toothed elements 70A, 70B shown in FIGS. 10 and 11 function similar to the wedge-shaped body 27 shown and described in FIGS. 1-5 to reduce or eliminate gap(s) between the battery cell stack 58 and the stabilization plate 60 and/or the battery cell housing 52.
  • the adjustable toothed elements 70 A, 70B are lockingly engaged with the toothed elements 60A, 60B of the stabilization plate 60
  • the insertion of the adjustable toothed elements 70A, 70B between the battery cell stack 58 and the stabilization plate 60 provides a pre-loading compression force on the battery cell stack 58.
  • the stabilization plate 60 helps transfer the hold down force to the battery cell housing 52.
  • the battery cells 54 are assembled into a battery cell stack 58 and secured and stabilized within the battery cell housing 52 using a hold-down unit 61 for each battery cell 54.
  • a stabilization plate 60 coupled to at least one interior wall 72 of the battery cell housing 52 and/or positioned on top of the battery cell stack 58.
  • the adjustable toothed elements 70A, 70B may be coupled to the battery cell housing 52 (as shown in FIGS. 8 and 9) or not coupled to the battery cell housing 52 (as shown in FIGS. 10 and 11).
  • the adjustable toothed elements 70 A, 70B are moved from an assembly position to an engagement position (in which the teeth 78A, 78B are engageable with the teeth 76A, 76B of the stabilization plate 60).
  • the adjustable toothed elements 70A, 70B may be located between the terminals 64 of adjacent battery cells 54 so that engagement between the adjustable toothed elements 70A, 70B and the toothed elements 68A, 68B of the stabilization plate 60 does not interfere with, or is not blocked by, the terminals 64.
  • each adjustable toothed element 70A, 70B includes a stop element 86 that limits linear movement of the adjustable toothed element 70A, 70B toward the battery cell 54.
  • Each adjustable toothed element 70A, 70B is linearly moved toward a corresponding battery cell 54 (either horizontally or vertically), such that the teeth 76, 78 engage with each other, until the stop element 86 of each adjustable toothed element 70 A, 70B comes into contact with the corresponding battery cell 54 and prevents further movement of the adjustable toothed element 70A, 70B.
  • the length of the stop element 86 causes a gap to be maintained between the stabilization plate 60 (for example, the central portion 66 of the stabilization plate 60) and the upper surface of the battery cell stack 58, as shown in FIGS. 9 and 11.
  • the configuration of the teeth 76 of the toothed elements 68 A, 68B and the teeth 78 of the adjustable toothed elements 70 A, 70B prevents linear movement of the adjustable toothed elements 70A, 70B away from the battery cell 54 once the stop element 86 comes into contact with the corresponding battery cell 54.
  • the hold down assembly 50 allows each battery cell 54 to be individually secured and stabilized within the battery cell housing 52, even if all of the battery cells 54 within the battery cell stack 58 are not aligned with each other.
  • each battery cell 54 may be secured and stabilized, even if the battery cells 54 are positioned unevenly within the battery cell stack 58.
  • each battery cell 54, and the battery cell stack 58 as a whole is secured and stabilized within the battery cell housing 52, even in the occurrence of a higher load due to cell expansion forces within the battery cell 54, inertia acting upon the battery cell stack 58 during shock or vibration, and/or other factors.
  • Use of the hold-down assembly 50 also allows for the use of thinner thermal pads between the battery cell stack 58 and/or battery cells 54 and the battery cell housing 52, which reduces cost and increases thermal conductivity of the thermal pads.
  • the teeth on the adjustable toothed elements 70 and the toothed elements 68, and those on the hold down device 20 and the battery housing 22, are arranged to allow sliding engagement in one direction, e.g., the direction of insertion, but not to allow release.
  • the operation is similar to the operation of a plastic cable tie.
  • a hold-down device 20 for use in a battery cell housing 22 includes a wedge-shaped body 27 including a first end 28 and a second end 30 opposite the first end 28, a planar surface 32 between the first end 28 and the second end 30, and a toothed surface 38 between the first end 28 and the second end 30 and opposite the planar surface 32, the toothed surface 38 having a plurality of teeth 40.
  • the wedge-shaped body 27 is tapered from the first end 28 to the second end 30.
  • the first end 28 is oriented at a right angle to the planar surface 32.
  • the battery cell housing 22 includes a toothed surface 42 having a plurality of teeth 44, the plurality of teeth 40 of the toothed surface 38 of the wedge-shaped body 27 being lockingly engageable with the plurality of teeth 44 of the toothed surface 42 of the battery cell housing 22 to prevent movement of the hold down device 20.
  • the hold-down device 20 is sized and insertable into a gap 26 between the battery cell housing 22 and a battery cell stack 24 within the battery cell housing 22.
  • a battery module 48 includes a battery cell housing 22 including a plurality of interior surfaces that define an interior chamber 25, at least one of the interior surfaces being a toothed surface 42 that includes a plurality of teeth 44, and a battery cell stack 24 within the interior chamber 25.
  • the battery cell stack 24 includes a plurality of battery cells 36 and is located a distance from the toothed surface 42 of the battery cell housing 22.
  • the battery module 48 also includes a hold-down device 20 located between the toothed surface 42 of the battery cell housing 22 and the battery cell stack 24, the hold-down device 20 including a wedge- shaped body 27.
  • the wedge-shaped body 27 has a first end 28 and a second end 30 opposite the first end 28, the wedge-shaped body 27 being tapered from the first end 28 to the second end 30, a planar surface 32 between the first end 28 and the second end 30, the planar surface 32 being in contact with at least a portion of the battery cell stack 24, and a toothed surface 38 between the first end 28 and the second end 30 and opposite the planar surface 32, the toothed surface 38 being in contact with the toothed surface 42 of the battery cell housing 22 and having a plurality of teeth 40 that are lockingly engageable with the plurality of teeth 44 on the toothed surface 42 of the battery cell housing 22.
  • the first end 28 is oriented at a right angle to the planar surface 32 and the toothed surface 38 of the wedge-shaped body 27 is oriented at an acute angle to the first end 28.
  • the toothed surface 42 of the battery cell housing 22 is oriented at the same acute angle to the first end 28 of the wedge-shaped body 27 as the toothed surface 38 of the wedge-shaped body 27.
  • a hold-down assembly 50 for use with a battery cell 54 includes a stabilization plate 60 including a planar central portion 66 having a first edge and a second edge opposite the first edge, the planar central portion positionable across all of the plurality of battery cells, a first toothed element 68 A at the first edge, and a second toothed element 68B at the second edge.
  • the hold-down assembly 50 further includes a first adjustable toothed element 70A and a second adjustable toothed element 70B.
  • the first 68A toothed element has includes a first plurality of teeth 76A
  • the second 68B toothed element includes a second plurality of teeth 76B
  • the first adjustable toothed element 70A includes a third plurality of teeth 78 A
  • the second 70B adjustable toothed element includes a fourth plurality of teeth 78B, the first plurality of teeth 76A being lockingly engageable with the third plurality of teeth 78 A
  • the second plurality of teeth 76B being lockingly engageable with the fourth plurality of teeth 78B.
  • the planar central portion 66 lies in a plane, at least a portion of each of the first 68A and second 68B toothed elements extending from the planar central portion 66 in a direction that is orthogonal to the plane in which the planar central portion 66 lies.
  • each of the first 70A and second 70B adjustable toothed elements is movingly couplable to the battery cell housing 52 such that each of the first 70A and second 70B adjustable toothed elements is linearly movable in a direction that is orthogonal to the plane in which the planar central portion 66 lies.
  • each of the first 70 A and second 70B adjustable toothed elements is linearly movable in a direction that is parallel to the plane in which the planar central portion 66 lies.
  • a battery module 56 includes a battery cell housing 52 including a plurality of interior walls 72 that define an interior chamber 74, the plurality of interior walls 72 including a first interior wall 72A and a second interior wall 72B opposite the first interior wall 72A and a battery cell stack 58 within the interior chamber 74, the battery cell stack 58 including a plurality of battery cells 54.
  • the battery module 56 also includes: a hold-down assembly 50 including a stabilization plate 60 having a planar central portion 66, a first edge, and a second edge opposite the first edge, the planar central portion 66 of the stabilization plate being positionable within the battery cell housing 52 across each of the plurality of battery cells 54 and lying in a plane; a first plurality of toothed elements 68A, each of the first plurality of toothed elements 68A being at the first edge of the stabilization plate 60 and including a first plurality of teeth 76A; a second plurality of toothed elements 68B, each of the second plurality of toothed elements 68B being at the second edge of the stabilization plate 60 and including a second plurality of teeth 76B; a first plurality of adjustable toothed elements 70A, each of the first plurality of adjustable toothed elements 70A being movable within the battery cell housing 52 and including a third plurality of teeth 78A, the third plurality of teeth 78A being lockingly
  • each of the first 70A and second 70B pluralities of adjustable toothed elements is movingly couplable to the battery cell housing 52.
  • the stabilization plate 60 further has a first end and a second end opposite the first end, each of the first edge and the second edge being between the first end and the second end, each of the first end and the second end being couplable to the battery cell housing 52.
  • each of the first 70A and second 70B pluralities of adjustable toothed elements is linearly movable in a directly that is orthogonal to the plane in which a corresponding planar central portion 66 lies.
  • each of the first 70A and second 70B pluralities of adjustable toothed elements is linearly movable in a directly that is parallel to the plane in which a corresponding planar central portion 66 lies, each of the first 70A and second 70B pluralities of adjustable toothed elements being insertable between the stabilization plate 60 and at least one of the plurality of battery cells 54.
  • each of the first 70 A and second 70B pluralities of adjustable toothed elements includes a stop element 86 that limits movement of each of the first 70 A and second 70B pluralities of adjustable toothed elements toward a corresponding one of the plurality of battery cells 54.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne un dispositif et un ensemble de retenue destinés à fixer et à stabiliser un ou plusieurs éléments de batterie à l'intérieur d'un boîtier d'éléments de batterie tout en réduisant les espaces entre les parois du boîtier d'éléments de batterie et les éléments de batterie à l'intérieur de celui-ci. Dans un mode de réalisation, le dispositif de retenue comprend un corps cunéiforme comprenant une première extrémité et une seconde extrémité opposée à la première extrémité, une surface plane entre la première extrémité et la seconde extrémité, et une surface dentée entre la première extrémité et la seconde extrémité et opposée à la surface plane. Dans un mode de réalisation, l'ensemble de retenue comprend une partie centrale plane conçue pour être accouplée à l'élément de batterie, la partie centrale plane ayant une première extrémité et une seconde extrémité opposée à la première extrémité, un premier élément denté au niveau de la première extrémité, et un second élément denté au niveau de la seconde extrémité.
PCT/US2018/065697 2017-12-15 2018-12-14 Ensemble et dispositif de retenue pour batterie Ceased WO2019118849A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201762599418P 2017-12-15 2017-12-15
US62/599,418 2017-12-15
US201862667686P 2018-05-07 2018-05-07
US62/667,686 2018-05-07

Publications (1)

Publication Number Publication Date
WO2019118849A1 true WO2019118849A1 (fr) 2019-06-20

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111162227A (zh) * 2020-04-03 2020-05-15 广东博智林机器人有限公司 一种电池自锁机构及电池更换装置
WO2022105073A1 (fr) * 2020-11-19 2022-05-27 深圳市迪比科电子科技有限公司 Structure de liaison synchrone de verrouillage et de déverrouillage d'une base d'alimentation électrique portative partagée
CN114843694A (zh) * 2022-05-23 2022-08-02 中创新航科技股份有限公司 电池包及电池包的组装方法
WO2023020128A1 (fr) * 2021-08-19 2023-02-23 比亚迪股份有限公司 Bloc-batterie et véhicule
US20230327265A1 (en) * 2022-03-23 2023-10-12 Ford Global Technologies, Llc Shim systems for traction battery packs
EP4376184A1 (fr) * 2022-11-24 2024-05-29 SK On Co., Ltd. Bloc-batterie
DE102023112379B3 (de) 2023-05-11 2024-06-13 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren zum Lagefixieren von einem Batteriezellenpaket in einem Batteriemodulgehäuse sowie Batteriemodul

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US4276361A (en) * 1980-06-26 1981-06-30 Gte Products Corporation Electrochemical cell with electrode hold-down
US20150037633A1 (en) * 2012-03-12 2015-02-05 Kabushiki Kaisha Toyota Jidoshokki Battery pack
EP3026732A1 (fr) * 2014-11-25 2016-06-01 Toyota Jidosha Kabushiki Kaisha Batterie assemblée et procédé de fabrication d'une batterie assemblée
WO2017001119A1 (fr) * 2015-06-30 2017-01-05 Robert Bosch Gmbh Élément de retenue pour fixer des éléments de batterie dans un sous-module de batterie et sous-module de batterie

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4276361A (en) * 1980-06-26 1981-06-30 Gte Products Corporation Electrochemical cell with electrode hold-down
US20150037633A1 (en) * 2012-03-12 2015-02-05 Kabushiki Kaisha Toyota Jidoshokki Battery pack
EP3026732A1 (fr) * 2014-11-25 2016-06-01 Toyota Jidosha Kabushiki Kaisha Batterie assemblée et procédé de fabrication d'une batterie assemblée
WO2017001119A1 (fr) * 2015-06-30 2017-01-05 Robert Bosch Gmbh Élément de retenue pour fixer des éléments de batterie dans un sous-module de batterie et sous-module de batterie

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111162227A (zh) * 2020-04-03 2020-05-15 广东博智林机器人有限公司 一种电池自锁机构及电池更换装置
CN111162227B (zh) * 2020-04-03 2020-08-04 广东博智林机器人有限公司 一种电池自锁机构及电池更换装置
WO2022105073A1 (fr) * 2020-11-19 2022-05-27 深圳市迪比科电子科技有限公司 Structure de liaison synchrone de verrouillage et de déverrouillage d'une base d'alimentation électrique portative partagée
WO2023020128A1 (fr) * 2021-08-19 2023-02-23 比亚迪股份有限公司 Bloc-batterie et véhicule
US20230327265A1 (en) * 2022-03-23 2023-10-12 Ford Global Technologies, Llc Shim systems for traction battery packs
CN114843694A (zh) * 2022-05-23 2022-08-02 中创新航科技股份有限公司 电池包及电池包的组装方法
EP4376184A1 (fr) * 2022-11-24 2024-05-29 SK On Co., Ltd. Bloc-batterie
US12237522B2 (en) 2022-11-24 2025-02-25 Sk On Co., Ltd. Battery pack comprising a support frame with an incline surface
DE102023112379B3 (de) 2023-05-11 2024-06-13 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren zum Lagefixieren von einem Batteriezellenpaket in einem Batteriemodulgehäuse sowie Batteriemodul

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