CN114388976A - Battery pack and disassembling method thereof - Google Patents

Battery pack and disassembling method thereof Download PDF

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Publication number
CN114388976A
CN114388976A CN202111663802.7A CN202111663802A CN114388976A CN 114388976 A CN114388976 A CN 114388976A CN 202111663802 A CN202111663802 A CN 202111663802A CN 114388976 A CN114388976 A CN 114388976A
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China
Prior art keywords
battery pack
battery
heating
bonding layer
layer
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Granted
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CN202111663802.7A
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Chinese (zh)
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CN114388976B (en
Inventor
张新宾
张占江
王振涛
吴俊涛
李阳
杨明
卢雨龙
阎超
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FAW Group Corp
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FAW Group Corp
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Priority to CN202111663802.7A priority Critical patent/CN114388976B/en
Publication of CN114388976A publication Critical patent/CN114388976A/en
Priority to PCT/CN2022/119553 priority patent/WO2023124267A1/en
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Publication of CN114388976B publication Critical patent/CN114388976B/en
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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
    • H01M50/258—Modular batteries; Casings provided with means for assembling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
    • 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
    • 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
    • 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
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H01M50/264—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
    • 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

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

Abstract

The invention discloses a battery pack and a disassembling method thereof, wherein the battery pack comprises: the battery module comprises a box body, a battery module and a self-heating bonding assembly, wherein the box body is provided with an accommodating cavity; the battery module is arranged in the accommodating cavity and comprises at least one battery cell; the self-heating bonding component comprises a heating layer, the heating layer is powered by a battery module, and the battery module is bonded and fixed in the accommodating cavity through the self-heating bonding component. The invention can enable the prior high-integrated battery to be disassembled without damage, prevent the thermal runaway spreading of the battery pack and fully utilize the residual electric quantity of the battery pack, thereby reducing the energy waste and the disassembling difficulty of the battery pack.

Description

Battery pack and disassembling method thereof
Technical Field
The invention relates to the technical field of electric vehicle batteries, in particular to a battery pack and a disassembling method thereof.
Background
With the increasing global energy crisis and the environmental pollution problem, electric vehicles are rapidly developing. The electric automobile uses electric power as a power source, and a large amount of additional fossil fuel can be saved by replacing a fuel engine with an electric motor. With the increasing maturity and development of the power battery technology of the electric automobile, the electric automobile is bound to become the main trend of the development of the automobile industry in the future.
Along with the continuous promotion of system integration, use the gluing technique to have become a trend, the energy density of battery package has been improved greatly in gluing technique's application, but the defect of gluing technique is hardly to be gone on nondestructively and disassembles, just so restricted battery package maintenance and the echelon application after the battery package retires, present regulation and regulation, battery package must consider echelon utilization and recovery, simple violence is disassembled and can not exert the value of battery to the maximize and also not accord with the requirement of environmental protection, consequently, how to nondestructively disassemble the battery package of viscose scheme is the difficult problem that needs to solve.
Meanwhile, when the battery pack is disassembled, the residual electric quantity of the battery pack needs to be released, the fire risk in the disassembling process is avoided, the currently used method is that the residual electric quantity is directly released through a power distribution cabinet, energy waste can be caused, and the energy is reasonably used and is also a problem to be considered.
Disclosure of Invention
The present invention is directed to a battery pack and a disassembling method thereof, so as to solve the problems of the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a battery pack, comprising:
the box body is provided with an accommodating cavity;
the battery module is arranged in the accommodating cavity and comprises a plurality of battery cores;
the self-heating bonding assembly comprises a heating layer, the heating layer is powered by the battery module, and the battery module is bonded and fixed in the accommodating cavity through the self-heating bonding assembly.
Further, the self-heating bonding assembly further comprises a first bonding layer and a second bonding layer, the heating layer is respectively bonded with the first bonding layer and the second bonding layer, the first bonding layer is bonded with the battery module, and the second bonding layer is bonded and fixed with the accommodating cavity.
Further, the zone of heating includes first input anodal, first input negative pole and heating member, first input anodal and first input negative pole respectively with the heating member electricity is connected, first input anodal with first input negative pole electricity respectively is connected the positive negative pole of battery package.
Further, the zone of heating still includes the anodal and the second input negative pole of second input, the anodal and the second input negative pole of second input respectively with it is connected to add the heat piece electricity, the anodal and the second input negative pole of second input can be connected with external power source electricity, through external power source is the zone of heating power supply.
Further, the heating member is even arranges in the self-heating bonding subassembly, the heating member is the heater strip or heats the membrane.
Further, the heating device also comprises a control switch, wherein the control switch is arranged on a loop of the battery pack and the heating element and used for controlling the battery pack to supply power or cut off power to the heating element.
Further, it forms by lateral wall and bottom plate enclose to hold the chamber, the bottom plate is provided with the screw hole, it is provided with the crossbeam to hold the intracavity, the crossbeam is provided with the via hole, the crossbeam still includes the fastener, the fastener is worn to establish the via hole will the crossbeam is fixed in the screw hole.
Further, still include the gasket, the outer envelope of electric core is the cuboid shape, and when a plurality of electric cores were arranged, set up a slice between per two electric cores the gasket.
Further, the gasket is a cuboid which is thin in the center and gradually thickened towards the edge.
Further, a method for disassembling a battery pack comprises the following steps:
when the electric quantity of the battery pack is sufficient and the main loop of the battery pack is normal, the anode and the cathode of the heating layer are respectively connected with the anode and the cathode of the battery pack or respectively connected with the anode and the cathode of the battery module;
the battery management system collects the temperature of each point in the battery pack;
when the softening temperature threshold of the bonding layer is reached and the preset time is delayed, disassembling the battery pack;
when the electric quantity of the battery pack is sufficient but the main loop is not communicated, determining the position of a fault battery core through a battery management system;
if the number of the fault battery cells is one or more, the battery cells of the battery pack are divided into two groups of battery cells by taking the one or more fault battery cells as nodes;
connecting the two groups of battery cells in parallel or in series, and respectively electrically connecting the positive electrodes and the negative electrodes of the two groups of battery cells connected in parallel or in series with the positive electrode and the negative electrode of the heating layer for heating the bonding layer;
the battery management system collects the temperature of each point in the battery pack;
when the softening temperature threshold of the bonding layer is reached and the preset time is delayed, disassembling the battery pack;
if the fault battery cell is one battery cell and/or a plurality of continuous battery cells, the fault battery cell is taken as a node, the battery cells which normally work are divided into n groups, the n groups of the normal working battery cells are connected in parallel or in series to form a new battery pack, and the anode and the cathode of the new battery pack which is connected in parallel or in series are respectively and electrically connected with the two stages of the heating layer for heating the bonding layer;
the battery management system collects the temperature of each point in the battery pack;
when the softening temperature threshold of the bonding layer is reached and the preset time is delayed, disassembling the battery pack;
the battery pack has insufficient electricity, and the rest electricity cannot soften the bonding layer;
the second output anode and the second output cathode are electrically connected with an external power supply and used for heating the bonding layer;
the battery management system collects the temperature of each point in the battery pack;
and when the softening temperature threshold of the bonding layer is reached and the preset time is delayed, disassembling the battery pack.
Compared with the prior art, the invention has the beneficial effects that: the invention can enable the prior high-integrated battery to be disassembled without damage, prevent the thermal runaway spreading of the battery pack and fully utilize the residual electric quantity of the battery pack, thereby reducing the energy waste and the disassembling difficulty of the battery pack.
Drawings
Fig. 1 is an exploded view of a battery pack structure according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a battery module according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a battery pack case according to an embodiment of the invention;
FIG. 4 is a schematic view of a gasket structure according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a self-heating bonding assembly according to an embodiment of the present invention;
FIG. 6 is a flowchart of a method for disassembling a battery pack when the battery pack has sufficient power and the main circuit of the battery pack is normal according to an embodiment of the present invention;
FIG. 7 is a flowchart of a method for disassembling a battery pack when the battery pack has sufficient power and a main circuit of the battery pack is disconnected according to an embodiment of the present invention;
fig. 8 is a flowchart of a method for disassembling one or a plurality of continuous faulty cells when the battery pack has sufficient electric power and the main circuit of the battery pack is not connected according to the embodiment of the present invention;
FIG. 9 is a flowchart of a method for disassembling a battery pack when the battery pack is low in power according to an embodiment of the present invention;
fig. 10 is a flowchart of a method for disassembling a battery pack according to an embodiment of the invention.
In the figure: 100. a box body; 200. a battery module; 300. a gasket; 400. a self-heating bonding assembly; 110. a cross beam; 120. an accommodating chamber; 410. a heating layer; 420. a first adhesive layer; 430. a second adhesive layer; 111. a via hole; 411. a first input positive electrode; 412. a heating member; 413. a first input cathode; 121. a base plate; 1211. a threaded bore.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to the attached drawings of the specification, the invention provides a technical scheme that: as shown in fig. 1, a battery pack includes:
a case 100 provided with a receiving chamber 120;
the battery module 200 is disposed in the accommodating cavity 120, and the battery module 200 includes at least one battery cell;
self-heating bonding subassembly 400, self-heating bonding subassembly 400 includes zone of heating 410, zone of heating 410 by battery module 200 supplies power, battery module 200 passes through self-heating bonding subassembly 400 bonds to be fixed hold in the chamber 120.
In the above embodiment, the battery cell is connected with the bottom plate of the box body through the self-heating structure bonding assembly, so that the positioning in the Y and Z directions is realized.
When electric core is disassembled, the electric energy of electric core self is converted into heat energy by the heating layer of the self-heating structure bonding assembly, the bonding layer is heated to a softening state, the bonding strength of the bonding layer is reduced, the bonding layer can be disassembled, and the safety risks such as deformation, damage, leakage or short circuit caused by forced disassembly are avoided.
Optionally, as shown in fig. 5, the self-heating bonding assembly 400 further includes a first bonding layer 420 and a second bonding layer 430, and the heating layer 410 is bonded to the first bonding layer 420 and the second bonding layer 430, respectively.
Alternatively, as shown in fig. 1, the heating layer 410 includes a first positive input electrode 411, a first negative input electrode 413, and a heating element 412, the first positive input electrode 411 and the first negative input electrode 413 are respectively electrically connected to the heating element 412, and the first positive input electrode 411 and the first negative input electrode 413 are respectively electrically connected to the positive electrode and the negative electrode of the battery pack.
In the above embodiment, the heating element 412 can convert electrical energy into heat energy to heat and soften the first adhesive layer 420 and the second adhesive layer 430 for non-destructive disassembly. Because the heat energy comes from the battery core or the battery pack, extra energy input is not needed, and the separate energy consumption of disassembly is reduced.
Optionally, the heating layer 410 further includes a second input positive electrode and a second input negative electrode, the second input positive electrode and the second input negative electrode are respectively electrically connected to the heating element 412, and the second input positive electrode and the second input negative electrode can be electrically connected to an external power source, through which power is supplied to the heating layer 410.
Optionally, the heating member 412 is uniformly disposed within the self-heating bonding assembly 400, and the heating member 412 is a heating wire or a heating film.
Optionally, the heating device further comprises a control switch, wherein the control switch is installed on a loop of the battery pack and the heating element and used for controlling the battery pack to supply power or cut off power to the heating element.
Optionally, as shown in fig. 3, the accommodating cavity 120 is defined by a side wall and a bottom plate 121, the bottom plate 121 is provided with a threaded hole 1211, a cross beam 110 is arranged in the accommodating cavity 120, the cross beam 110 is provided with a through hole 111, the cross beam 110 further includes a fastener, the fastener penetrates through the through hole 111 to fix the cross beam 110 in the threaded hole 1211, and the number of the through holes 111 depends on the number of the required fasteners.
In the above embodiment, after the number of the battery cells meets the requirement, the detachable beam 110 is installed and contacts with the battery cells to extrude the battery cells, so that the X direction of the battery cells is fixed.
Optionally, as shown in fig. 4, the battery further includes a gasket 300, an outer envelope of the battery cell is a cuboid shape, and when the plurality of battery cells are arranged, one gasket 300 is disposed between every two battery cells.
Optionally, the gasket 300 is a rectangular parallelepiped with a thin center and gradually thicker toward the edges.
In the above embodiments, the gasket 300 is disposed between the battery cells, and may play a role in heat insulation and insulation.
The gasket 300 is characterized in that the projection is rectangular, the thickness of the gasket 300 is far smaller than the length and width dimensions, and the thickness of the section of the gasket 300 along the thickness direction is the thickness of the edge which is larger than the thickness of the middle.
The phenomenon of inflation in the middle of cuboid shape electricity core can appear when using, and this kind of design of gasket 300 can provide the clearance for the inflation in the middle of the electricity core, and gasket 300 self has insulating thermal-insulated characteristic simultaneously, can block the heat transfer between the electricity core, can delay the thermal runaway extension when the thermal runaway.
In another aspect of the present invention, a method for disassembling a battery pack includes the following steps:
as shown in fig. 6, in S100, when the battery pack has sufficient electric quantity and the main circuit of the battery pack is normal, the positive electrode and the negative electrode of the heating layer are respectively connected with the positive electrode and the negative electrode of the battery pack, or respectively connected with the positive electrode and the negative electrode of the battery module;
s110, the battery management system collects the temperature of each point in the battery pack;
s120, when the softening temperature threshold of the bonding layer is reached and the preset time is delayed, disassembling the battery pack;
as shown in fig. 7, in S200, when the battery pack has sufficient electric quantity but the main loop is not available, determining the location of the faulty battery cell by the battery management system;
s210, if one or more fault battery cells are continuous, dividing the battery cells of the battery pack into two groups of battery cells by taking the one or more continuous fault battery cells as nodes;
s220, connecting the two groups of battery cells in parallel or in series, and respectively electrically connecting the positive electrodes and the negative electrodes of the two groups of battery cells connected in parallel or in series with the positive electrode and the negative electrode of the heating layer for heating the bonding layer;
s230, the battery management system collects the temperature of each point in the battery pack;
s240, when the softening temperature threshold of the bonding layer is reached and the preset time is delayed, disassembling the battery pack;
as shown in fig. 8, S300, if the faulty battery cell is one battery cell and/or multiple continuous battery cells, with the faulty battery cell as a node, dividing the battery cells in normal operation into n groups, connecting the n groups of battery cells in normal operation in parallel or in series to form a new battery pack, and electrically connecting the positive electrode and the negative electrode of the new battery pack in parallel or in series with the heating layer in two stages respectively for heating the bonding layer;
s310, the battery management system collects the temperature of each point in the battery pack;
s320, when the softening temperature threshold of the bonding layer is reached and the preset time is delayed, disassembling the battery pack;
as shown in fig. 9, in S400, the battery pack has insufficient power, and the remaining power cannot soften the adhesive layer;
s410, electrically connecting the second output anode and the second output cathode with an external power supply, and heating the bonding layer;
s420, the battery management system collects the temperature of each point in the battery pack;
and S430, when the softening temperature threshold of the bonding layer is reached and the preset time is delayed, disassembling the battery pack.
As shown in fig. 10, in steps S100 to S120 in the above embodiment, the structural adhesive is heated by using the electric quantity of the battery pack, and the battery management system collects the temperature of each point in the battery pack, delays for 30min after reaching the softening temperature T1 of the adhesive layer, and then performs disassembly;
step 200 and step 240, assuming that one battery core fails, the position of the failed battery core needs to be determined by the battery management system, the battery core in the battery pack is divided into two groups by using the position as a node, and the output electrodes of the heating layer are respectively connected with the positive electrode and the negative electrode of the two groups for electric energy conversion to heat the bonding layer. And when the battery management system collects that each point in the battery pack reaches the softening temperature T1 of the bonding layer, delaying for 30min, and disassembling. The processing idea when the multiple cell faults is the same as that when one cell faults.
And S400-S430, when the residual electric quantity of the battery pack can not soften the adhesive layer, the battery pack is electrically connected with an external power supply through the second output positive electrode and the second output negative electrode and is used for heating the adhesive layer, and the temperature T1 is delayed for 30min, so that the battery pack can be disassembled.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. A battery pack, comprising:
the box body is provided with an accommodating cavity;
the battery module is arranged in the accommodating cavity and comprises a plurality of battery cores;
the self-heating bonding assembly comprises a heating layer, the heating layer is powered by the battery module, and the battery module is bonded and fixed in the accommodating cavity through the self-heating bonding assembly.
2. The battery pack of claim 1, wherein the self-heating bonding assembly further comprises a first bonding layer and a second bonding layer, the heating layer is bonded to the first bonding layer and the second bonding layer respectively, the first bonding layer is bonded to the battery module, and the second bonding layer is bonded to the accommodating cavity.
3. The battery pack of claim 1, wherein the heating layer comprises a first positive input electrode, a first negative input electrode, and a heating element, the first positive input electrode and the first negative input electrode are electrically connected to the heating element, respectively, and the first positive input electrode and the first negative input electrode are electrically connected to the positive electrode and the negative electrode of the battery pack, respectively.
4. The battery pack of claim 3, wherein the heating layer further comprises a second positive input electrode and a second negative input electrode, the second positive input electrode and the second negative input electrode are electrically connected to the heating element, respectively, and the second positive input electrode and the second negative input electrode can be electrically connected to an external power source through which power is supplied to the heating layer.
5. The battery pack according to claim 4, wherein the heating member is uniformly arranged in the self-heating bonding member, and the heating member is a heating wire or a heating film.
6. The battery pack as claimed in claim 3, further comprising a control switch installed on a loop of the battery pack and the heating member for controlling the battery pack to supply or cut off power to the heating member.
7. The battery pack according to claim 1, further comprising a cross beam, wherein the accommodating cavity is defined by a side wall and a bottom plate, the bottom plate is provided with a threaded hole, the cross beam is provided with a via hole, the cross beam further comprises a fastener, and the fastener penetrates through the via hole to fix the cross beam in the threaded hole.
8. The battery pack of claim 1, further comprising a gasket, wherein an outer envelope of the battery cells is a rectangular parallelepiped, and when the plurality of battery cells are arranged, one gasket is disposed between every two battery cells.
9. The battery pack as set forth in claim 8, wherein the gasket is a rectangular parallelepiped having a thin center and gradually increased thickness toward the edges.
10. A method for disassembling a battery pack, comprising:
when the electric quantity of the battery pack is sufficient and the main loop of the battery pack is normal, the anode and the cathode of the heating layer are respectively connected with the anode and the cathode of the battery pack or respectively connected with the anode and the cathode of the battery module;
the battery management system collects the temperature of each point in the battery pack;
when the softening temperature threshold of the bonding layer is reached and the preset time is delayed, disassembling the battery pack;
when the electric quantity of the battery pack is sufficient but the main loop is not communicated, determining the position of a fault battery core through a battery management system;
if the number of the fault battery cells is one or more, the battery cells of the battery pack are divided into two groups of battery cells by taking the one or more fault battery cells as nodes;
connecting the two groups of battery cells in parallel or in series, and respectively electrically connecting the positive electrodes and the negative electrodes of the two groups of battery cells connected in parallel or in series with the positive electrode and the negative electrode of the heating layer for heating the bonding layer;
the battery management system collects the temperature of each point in the battery pack;
when the softening temperature threshold of the bonding layer is reached and the preset time is delayed, disassembling the battery pack;
if the fault battery cell is one battery cell and/or a plurality of continuous battery cells, the fault battery cell is taken as a node, the battery cells which normally work are divided into n groups, the n groups of the normal working battery cells are connected in parallel or in series to form a new battery pack, and the anode and the cathode of the new battery pack which is connected in parallel or in series are respectively and electrically connected with the two stages of the heating layer for heating the bonding layer;
the battery management system collects the temperature of each point in the battery pack;
when the softening temperature threshold of the bonding layer is reached and the preset time is delayed, disassembling the battery pack;
the battery pack has insufficient electricity, and the rest electricity cannot soften the bonding layer;
the second output anode and the second output cathode are electrically connected with an external power supply and used for heating the bonding layer;
the battery management system collects the temperature of each point in the battery pack;
and when the softening temperature threshold of the bonding layer is reached and the preset time is delayed, disassembling the battery pack.
CN202111663802.7A 2021-12-31 2021-12-31 Battery pack and disassembly method thereof Active CN114388976B (en)

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PCT/CN2022/119553 WO2023124267A1 (en) 2021-12-31 2022-09-19 Battery pack and disassembling method therefor

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