WO2021179733A1 - Module de batterie à garniture souple et son procédé d'assemblage - Google Patents

Module de batterie à garniture souple et son procédé d'assemblage Download PDF

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Publication number
WO2021179733A1
WO2021179733A1 PCT/CN2020/138353 CN2020138353W WO2021179733A1 WO 2021179733 A1 WO2021179733 A1 WO 2021179733A1 CN 2020138353 W CN2020138353 W CN 2020138353W WO 2021179733 A1 WO2021179733 A1 WO 2021179733A1
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WIPO (PCT)
Prior art keywords
plate
board
plates
soft
battery
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PCT/CN2020/138353
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English (en)
Chinese (zh)
Inventor
李峥
冯玉川
高伟
何泓材
陈凯
杨帆
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苏州清陶新能源科技有限公司
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Publication of WO2021179733A1 publication Critical patent/WO2021179733A1/fr

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    • 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
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • This application relates to the field of battery technology, and relates to a soft-packed battery module and an assembly method thereof, for example, to a soft-packed battery module that is convenient for pre-tightening and assembly.
  • the outer frame design needs to meet both the ease of assembly and the ability to apply pre-tightening force well.
  • the outer frame structure of the soft pack battery module generally has "n", “u, and "mouth”; the above three structures have some technical and structural defects.
  • the electric In order to enable the outer frame to continuously apply pretension to the cells, the electric
  • the technical solution that the size of the core is equivalent to the inner size of the outer frame or even slightly larger than the size of the outer frame is advantageous, but in actual operation, if the size of the cell is greater than or equal to the size of the outer frame, the outer frame structure and the cell are both rigid The structure and the elastic deformation are small. Therefore, the installation is very difficult. It is difficult to put the battery cell into the outer frame by manpower.
  • the cell size is smaller than the outer frame size, although the assembly efficiency can be improved, in this case, a considerable part of the pre-tightening force is absorbed by the outer frame, and the effect of the pre-tightening force is not good. After the outer frame absorbs the pre-tightening force, there is no internal Applying the corresponding pressure can easily cause deformation, causing the product to fail to meet the design requirements.
  • CN109346630A discloses a soft pack battery module structure, which includes an aluminum shell outer frame and an integrally formed reverse S-shaped aluminum plate.
  • the upper end surface, the lower end surface and the opening position of the reverse S-shaped aluminum plate are filled with a soft package battery core group
  • the soft-pack battery pack includes two soft-pack batteries; the soft-pack battery and the reverse S-shaped aluminum plate are fixed and inserted into the outer frame of the aluminum shell as a whole, and the sides of the reverse S-shaped aluminum plate and the aluminum shell
  • the inner side of the frame is in contact; one end of the outer frame of the aluminum shell is provided with an integrated cover plate, and the tabs of the soft-packed batteries are embedded in the integrated cover plate and led out through the insulating plate, and then pass through the right insulating cover plate and the right fixed end
  • the plate is fixed and sealed; the other end of the outer frame of the aluminum shell is fixed and sealed by the left insulating cover plate and the left fixed end plate; the reverse S-shaped aluminum plates are all integrally formed
  • CN109411667A discloses a soft pack battery module, comprising: a bottom plate, a protective frame assembly, at least two soft pack cells arranged in parallel, at least one first insulating plate, at least one second insulating plate, and at least one The first bus bar of the positive poles of the two soft-packed batteries and at least one second bus bar for leading out the negative poles of the at least two soft-packed batteries, the protection frame assembly is arranged on the bottom plate, and the first bus An insulating plate, the second insulating plate, the first bus bar and the second bus bar are all arranged on the bottom plate, and spacers for heat insulation are provided between at least two soft-packed cells, The bottoms of at least two soft-pack batteries are connected to the bottom plate through a thermally conductive adhesive material, and the positive ears of at least two soft-pack batteries are connected to the first side surface of the first busbar through a first adhesive, and at least two The negative ear of a soft-packed battery cell is connected to the first side surface of the second bus bar through
  • the gap between the insulating plate and the bus bar of the soft-packed battery module, and the gap between the bus bar and the soft-packed cell is filled with a first adhesive, the insulating plate and the side plate are bonded together by a second adhesive, and the first adhesive and The second adhesive can replace the outer frame and other fixing structural parts in the battery module, and not only ensures the fixing of the battery module structure, but also greatly reduces the weight of the soft-packed battery module.
  • it only uses the exploded diagram to reveal the positional relationship of the multiple modules of the module, and does not involve the connection relationship of the multiple modules of the module, nor can it overcome the problem of the module's inability to install and pre-tighten.
  • the present application provides a soft-pack battery module and an assembly method thereof, for example, provides a soft-pack battery module that is convenient for pre-tightening and assembly.
  • the present application provides a soft-packed battery module.
  • the soft-packed battery module includes a battery cell group, left and right side plates, upper and lower cover plates, and front and rear side plates arranged on the outside of the battery core group.
  • the left and right side plates include The left side panel and the right side panel
  • the upper and lower cover panels include an upper cover panel and a lower cover panel
  • the front and rear side panels include a front side panel and a rear side panel;
  • the left and right side plates are detachably connected with the upper and lower cover plates by interference fit, or the left and right side plates are detachably connected with the front and rear side plates by interference fit, so that the left and right side plates are continuously constrained by the upper and lower cover plates or the front and rear side plates. Clamp the pressure of the battery pack to tighten the battery pack, the pressure is 5-300kPa;
  • the left and right side plates, the upper and lower cover plates, and the front and rear side plates can be detachably connected to encapsulate the battery pack to form a soft pack battery module;
  • the battery cell group includes foam, the left and right side plates are in a direction parallel or consistent with the plane of the battery sheet, and the front and rear side plates are perpendicular to the left and right side plates and the horizontal plane.
  • the present application provides a method for assembling the above-mentioned soft-pack battery module, and the method includes:
  • the upper cover and the lower cover are detachably connected to the left and right panels, or the front and rear panels are connected to the left and right panels, respectively Make a detachable connection;
  • the upper and lower cover plates and the left and right side plates are in a tightly fitted state and have been pre-tightened, so that the left and right side plates continue to receive the pressure from the upper and lower cover plates to the battery core.
  • the pressure is 5kPa-300kPa.
  • Figure 1 is an exploded view of the detachable module of this application
  • FIG. 2 is a schematic diagram of a snap-fit structure adopted for connecting the upper and lower cover plates and the left and right side plates of the detachable module of the present application;
  • FIG. 3 is a schematic diagram of the structure of the FPC assembly board of the present application.
  • FIG. 4 is a schematic diagram of the structure of the front cover assembly plate of the present application.
  • Figure 5 is a schematic diagram of the structure of the front end cover assembly plate of the present application.
  • Figure 6 is the stress-strain fitting curve of PU foam used to calculate the foam pre-tightening compression x%
  • This embodiment provides a soft-packed battery module, which relates to a detachable module.
  • the exploded view of the soft-packed battery module is shown in FIG.
  • the left and right side panels include a left side panel 11 and a right side panel 5 arranged oppositely
  • the upper and lower cover panels include an upper cover panel 1 and a lower cover panel 8 arranged oppositely
  • the front and rear side panels include: front end covers arranged oppositely
  • the assembly board 10 see Figure 5 for the structural diagram
  • the rear cover assembly plate 3 and the front cover assembly board 9 (see Figure 4 for the structural schematic diagram) and the rear cover assembly board 4 arranged oppositely, and the front cover assembly
  • the plate 9 and the rear cover assembly plate 4 are respectively located on the side of the front cover assembly plate 10 and the rear cover assembly plate 3 close to the battery cell group;
  • the left and right side plates are continuously constrained by the upper and lower cover plates to generate pressure for clamping the battery cells.
  • the pressure is 5kPa-300kPa (for example, 5kPa, 10kPa, 20kPa, 30kPa, 40kPa, 50kPa, 60kPa, 70kPa, 80kPa, 100kPa, 135kPa, 160kPa, 200kPa, 240kPa, 265kPa or 290kPa, etc.), in order to better take into account the structural rigidity, processing feasibility and pre-tightening effect, you can choose 10-100kPa, and then choose 20 -50kPa.
  • the battery cell group 7 includes a plurality of (that is, at least two) battery cells, at least two battery cells are a group, and foam is arranged at intervals between each group of battery cells.
  • the left and right side plates and the upper and lower cover plates or the left and right side plates and the front and rear side plates are connected in an adjustable and detachable manner to tighten the internal battery pack, the left and right side plates and the interior containing foam
  • the battery pack is in a clamped state
  • the upper and lower cover plates or the front and rear side plates are detachably connected with the left and right side plates by interference fit, so that the left and right side plates are continuously restrained by the upper and lower cover plates or the front and rear side plates to generate pressure to clamp the batteries.
  • the left and right side plates transmit the pressure to the battery core, so that the battery core is always subjected to corresponding pre-tightening pressure during the assembly process, which effectively overcomes the problems caused by the expansion of the battery core.
  • the left side plate 11 and the right side plate 5 are arranged oppositely, the upper cover plate 1 and the lower cover plate 8 are arranged oppositely, and the front side plate and the rear side plate are arranged oppositely.
  • front and rear side panels are in any one of the following two forms:
  • the front and rear side panels are front and rear end cover assembly plates, and the front and rear end cover assembly plates are the front end cover assembly plate 10 and the rear end cover assembly plate 3 that are opposed to each other;
  • the front and rear side panels include: a front cover assembly plate 10 and a rear cover assembly plate 3 arranged opposite, and a front cover assembly plate 9 and a rear cover assembly plate 4 arranged oppositely, and the front cover plate
  • the assembly board 9 and the rear cover assembly board 4 are respectively located on the side of the front cover assembly board 10 and the rear cover assembly board 3 close to the battery cell group 7.
  • the front cover assembly board 9 includes a copper bar 17 and a board slot 18 supporting the copper bar 17, the battery pack 7 is connected to the copper bar to form a complete circuit loop, and the board slot 18 is arranged in In the front cover assembly board 9, the plate slot 18 functions to support the copper bar 17, and at the same time isolates the copper bar 17 and the battery core lugs to prevent the copper bar 17 from contacting the battery lugs.
  • the front end cover assembly plate 10 is composed of a front end cover and an insulating plate 19, and the insulating plate 19 is arranged to physically isolate the copper bars 17 to prevent leakage and short circuit.
  • the rear cover assembly board 4 includes a copper bar 17 and a board slot 18 supporting the copper bar 17.
  • the battery pack 7 is connected to the copper bar 17 to form a complete circuit loop, and the board slot 18 is provided In the rear cover assembly board 4, the plate slot 18 functions to support the copper bar 17, and at the same time isolate the copper bar 17 and the battery core lugs to prevent the copper bar 17 from contacting the battery lugs.
  • the rear cover assembly plate 3 is composed of a rear cover and an insulating plate 19, and the insulating plate 19 is arranged to physically isolate the copper bars 17 to prevent leakage and short circuit.
  • the present application does not limit the detachable connection mode, and it may be a common connection mode in related technologies, such as a conventional mechanical fitting mode, which may optionally include buckle, snap, or bolt and/or nut connection.
  • a conventional mechanical fitting mode which may optionally include buckle, snap, or bolt and/or nut connection.
  • the contact part of the upper cover plate 1 and the side plates can be set as a bent part, and the distance between the two bent parts of the cover plate is slightly smaller than that of the entire module. With lateral width, the upper cover plate 1 and the side plates form an interference fit to form a compact structure.
  • the upper cover plate 1 and the lower cover plate 8 the shape is not limited, such as a cone
  • the left and right side plates are provided with grooves capable of accommodating the protrusions, so that the upper and lower cover plates can interact with the side plates. Make a snap.
  • the joints formed by the detachable connection of the left and right side plates and the upper and lower cover plates/front and rear side plates are also connected by welding to ensure that the frame structure will not fail due to the expansion and deformation of the batteries at the end of the battery life.
  • the welding includes laser welding.
  • an FPC assembly board is further provided between the upper cover plate 1 and the battery cell group 7.
  • the FPC assembly board includes a flexible circuit board 15 and an FPC support board 16, and a limit structure 14 is provided on the FPC support board 16.
  • the limiting structure 14 is configured to fix the flexible circuit board 15, and the flexible circuit board 15 is provided with a temperature collecting sheet 13 and a voltage collecting sheet 12.
  • the FPC assembly board is detachably connected to the upper cover 1 by one of hot melt, snaps, and glue.
  • connection mode of the temperature collecting piece 13 and the voltage collecting piece 12 and the flexible circuit board 15 and the selection of the setting position are known, and can be selected according to the assembly requirements of the battery module.
  • the connection can be made by welding.
  • a heat insulation plate 21 is further provided between the left side plate 11 and the battery pack 7, and the heat insulation plate 21 and the left side plate 11 are connected by a thermally conductive structural glue 6.
  • a heat insulation plate 21 is further provided between the right side plate 5 and the battery pack 7, and the heat insulation plate 21 and the right side plate 5 are connected by a thermally conductive structural glue 6.
  • the heat insulation board 21 is made of a high temperature resistant material, which may be mica flakes or an aerogel with heat insulation, which can withstand high temperatures of 1000° C. for a short time and high temperatures above 500° C. for a long time.
  • a high temperature resistant material which may be mica flakes or an aerogel with heat insulation, which can withstand high temperatures of 1000° C. for a short time and high temperatures above 500° C. for a long time.
  • the soft-pack battery module of the present application forms a whole with a certain strength and rigidity through welding and gluing, so as to ensure the overall reliability of the module.
  • the left and right side plates, the upper and lower cover plates, the front end cover, and the rear end cover are made of aluminum materials, optionally high-strength aluminum materials, and the high-strength aluminum materials meet the following two points: first, left and right side panels and When the upper and lower cover plates or the front and rear end cover assembly plates are interference fit, suitable deformation occurs; second, the upper and lower cover plates or the front and rear end plates are detachably connected to the left and right side plates without deformation when pressure is applied to the high-strength aluminum material. .
  • the left and right side plates are formed by stamping or extrusion.
  • the upper and lower cover plates are formed by stamping or bending.
  • the front end cover and the rear end cover are formed by extrusion or casting.
  • the width of the upper and lower cover plates can be adjusted according to the pre-tightening requirements of the battery pack 7 and the foam.
  • the front cover assembly board 9 includes a copper bar 17 and a board slot 18 supporting the copper bar 17.
  • the battery pack 7 is connected to the copper bar 17 to form a complete circuit loop.
  • the board slot 18 is provided on the front cover.
  • the assembly board 9 plays a role of supporting the copper bar 17 and at the same time isolates the copper bar 17 and the battery core tabs to prevent the copper bar 17 from contacting the battery tabs.
  • the front end cover assembly plate 10 is composed of an end cover 20 and an insulating plate 19, and the insulating plate 19 physically isolates the copper bars 17 to prevent leakage and short circuit.
  • the rear cover assembly board 4 includes a copper bar 17 and a board slot 18 supporting the copper bar 17.
  • the battery pack 7 is connected to the copper bar 17 to form a complete circuit loop, and the board slot 18 is provided on the back cover.
  • the assembly board 4 plays a role of supporting the copper bar 17 and at the same time isolates the copper bar 17 and the battery core lugs to prevent the copper bar 17 from contacting the battery lugs.
  • the rear cover assembly plate 3 is composed of an end cover 20 and an insulating plate 19, and the insulating plate 19 physically isolates the copper bars 17 to prevent leakage and short circuit.
  • a Flexible Printed Circuit (FPC) assembly board 2 is also provided between the upper cover plate 1 and the battery cell group 7 (see Figure 3 for the structure diagram), and the FPC assembly board 2 includes a flexible circuit board 15 and an FPC support board. 16.
  • a limit structure 14 is provided on the FPC support board 16, and the limit structure 14 is set as a fixed flexible circuit board 15.
  • the flexible circuit board 15 is provided with a temperature acquisition sheet 13 and a voltage acquisition sheet 12, the temperature acquisition The slice 13 is configured to collect temperature information, and the voltage collection chip 12 is configured to collect voltage information.
  • a heat insulation plate 21 is provided between the left side plate 11 and the right side plate 5 and the battery pack 7 respectively, and the heat insulation plate 21 is connected to the left side plate 11 and the right side plate 5 by a thermally conductive structural adhesive 6.
  • the left and right side plates and the upper and lower cover plates are connected by a snap-fit structure (see Figure 2 for a structural diagram), so that the left and right side plates are continuously subjected to the pressure of the upper and lower cover plates pointing towards the battery cell group, thereby pressing the battery cell group.
  • the pressure is 5kPa-300kPa.
  • the left and right side plates, the upper and lower cover plates, and the front and rear side plates are all connected by a clamping structure to encapsulate the battery pack to form a soft pack battery module.
  • the battery pack 7 includes foam, the left and right side plates are in a direction parallel or consistent with the plane of the battery sheet, and the front and rear side plates are perpendicular to the left and right side plates and the horizontal plane.
  • This application provides the method for assembling the above-mentioned soft-pack battery module, and the method includes the following steps:
  • step (3) of this application is explained as follows: if step (2) connects the left side panel and the right side panel to the upper cover and the lower cover, here at least the front side panel and the rear side panel are connected to the left side panel respectively.
  • the board and the right board are detachably connected; if step (2) connects the left board and the right board to the front side board and the rear side board, at least the upper cover and the lower cover are connected to the left The board and the right side board are detachably connected.
  • the execution is performed in the following manner:
  • connection of the front cover assembly board and the rear cover assembly board is prior to the connection of the front cover assembly board and the rear cover assembly board.
  • the right side plate is detachably connected, and then the clamping is released, and finally the upper cover, lower cover, front cover assembly plate and rear cover assembly plate are connected to the left, right, and upper cover assembly plates. Connect with the lower cover assembly board.
  • the pressure test method is: measure the width of the battery module after the clamping is released to obtain the width A1, and then remove the upper and lower covers while keeping the left or right side of the battery module fixed, and use a pressure device to Pressure is applied on one side so that the width of the battery module becomes A1.
  • the pressure displayed by the pressure device can be understood as approximately equal to the pressure of the upper and lower cover plates restraining the left and right side plates.
  • the pressure test method can be: first determine the foam material, and then according to the stress-strain curve of the foam And the actual deformation state of the foam to determine the stress.
  • the left and right side plates and the battery cell group containing foam are in a clamped state during assembly, and the upper and lower cover plates/front and rear side plates and the left and right side plates have a detachable structure (such as a buckle structure). After the detachable connection, the clamping is released. At this time, the upper and lower cover plates/front and rear side plates and the left and right side plates are in a mating state.
  • a detachable structure such as a buckle structure
  • the method further includes: connecting the front side plate, the rear side plate, the left side plate, the right side plate, the upper cover plate and the lower cover plate Place welding and sealing. Welding is carried out after the upper and lower cover plates, the front and rear end cover assembly plates and the left and right side plates are detachably connected to ensure that the frame will not fail due to the expansion and deformation of the cells at the end of the battery life.
  • the welding includes laser welding.
  • the method further includes a module design step, and the module design step includes:
  • the test obtains the pre-tightening force of the battery cell group and the cell expansion space, and calculates the module width according to the pre-tightening force of the battery cell group and the cell expansion space.
  • module width pre-tensioned foam thickness dimension A+cell size+dimensions of other parts, the above-mentioned dimensions refer to the dimensions along the width direction of the module.
  • strain in Figure 2 is numerically equal to the pre-tightening compression in the formula, which is just a different definition of foam deformation under pre-tightening force.
  • the module design steps provided by this technical solution can be widely used in the design of soft pack battery modules.
  • the width of the module is calculated through the module design steps, and the module can be manufactured to achieve a simpler product structure, small parts and easy processing accuracy; product assembly is simple, one positioning can complete the assembly, the tooling required in the assembly process Few fixtures.
  • the module developed by this solution perfectly solves the problem that the width of the soft pack battery module cannot be guaranteed and the difficulty of the assembly process; at the same time, the pre-tightening force of the module is effectively realized to ensure the function of the product Sex and reliability.
  • the pressure-strain curve of the foam is obtained by measuring the strain of the foam under different stress conditions, and fitting the result to a curve or characteristic equation to obtain the pressure deformation characteristics of the foam.
  • the other components include any one or a combination of at least two of the heat shield, the frame, or the glue.
  • the present application provides a detachable outer frame for a soft pack battery.
  • the outer frame includes upper and lower cover plates, left and right side plates, and front and rear side plates.
  • the parts are all independent structures, and the six parts are detachably connected (for example, connected to each other through a clamping device) to form an outer frame of the soft pack battery.
  • this application also provides an overall soft-pack battery module and design scheme.
  • the tooling can apply the required pretension to the battery cell group. After proper pretension, the overall performance of the battery is greatly improved;
  • the upper and lower cover plates and the front and rear side plates are designed according to the actual size, the overall assembly efficiency of the battery is greatly improved, and there is no assembly of upper and lower cover plates or front and rear ends. Due to size problems when covering the plate, the tooling cannot be entered or withdrawn.
  • This embodiment provides a method for assembling the soft pack battery module described in Embodiment 1, which includes the following steps.
  • A is the size of the foam pre-tightened
  • y is the thickness of the foam
  • x% is the pre-tightening compression of the foam
  • z% is the total compression of the foam. Expansion space for the battery.
  • the FPC assembly board 2 is attached between the upper cover 1 and the battery pack 7, and the FPC assembly board 2 is attached between the left side board 11 and the right side board 5 and the battery pack 7 respectively.
  • the engagement is achieved by arranging a matching structure 22 on the corresponding side of the board (the card See Figure 2 for a schematic diagram of the combined structure.

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

Abstract

L'invention concerne un module de batterie à garniture souple et son procédé d'assemblage. Le module de batterie à garniture souple comprend un groupe de cellules (7), et des panneaux latéraux gauche et droit (11, 15), des panneaux de couverture supérieur et inférieur (1, 8) et des couvercles d'extrémité avant et arrière disposés sur des côtés externes du groupe de cellules (7) ; les panneaux latéraux gauche et droit (11, 15) et les panneaux de couverture supérieur et inférieur (1, 8) ou les panneaux latéraux gauche et droit (11, 15) et les panneaux latéraux avant et arrière peuvent exercer une forte pression contre le groupe de cellules internes (7) au moyen d'une mise en prise et d'une liaison réglables et amovibles, de sorte que les panneaux latéraux gauche et droit (11, 15) soient limités en continu par les panneaux de couverture supérieur et inférieur (1, 8) ou les panneaux latéraux gauche et droit (11, 15) pour produire une pression pour serrer le groupe de cellules (7), ce qui permet d'exercer une forte pression contre le groupe de cellules (7), la pression étant de 5 kPa à 300 kPa ; les panneaux latéraux gauche et droit (11, 15), les panneaux de couverture supérieur et inférieur (1, 8) et les couvercles d'extrémité avant et arrière sont tous reliés de manière détachable de façon à encapsuler le groupe de cellules (7) pour former le module de batterie à garniture souple ; le groupe de cellules (7) comprend une mousse, les panneaux latéraux gauche et droit (11, 15) sont dans une direction parallèle ou cohérente avec celle du plan des plaques de cellules, et les panneaux latéraux avant et arrière sont perpendiculaires aux panneaux latéraux gauche et droit (11, 15) et au plan horizontal.
PCT/CN2020/138353 2020-03-13 2020-12-22 Module de batterie à garniture souple et son procédé d'assemblage WO2021179733A1 (fr)

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