CN114388976B - Battery pack and disassembly method thereof - Google Patents
Battery pack and disassembly method thereof Download PDFInfo
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- CN114388976B CN114388976B CN202111663802.7A CN202111663802A CN114388976B CN 114388976 B CN114388976 B CN 114388976B CN 202111663802 A CN202111663802 A CN 202111663802A CN 114388976 B CN114388976 B CN 114388976B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 91
- 239000010410 layer Substances 0.000 claims description 70
- 230000003111 delayed effect Effects 0.000 claims description 13
- 239000012790 adhesive layer Substances 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000007480 spreading Effects 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000004026 adhesive bonding Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 230000001066 destructive effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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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)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery pack and a disassembly method thereof, wherein the battery pack comprises the following components: the battery module comprises a box body, a battery module and a self-heating bonding assembly, wherein the box body is provided with a containing cavity; the battery module is arranged in the accommodating cavity and comprises at least one electric core; 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. The invention can lead the current high-integration battery to be disassembled nondestructively, prevent the thermal runaway of the battery pack from spreading, fully utilize the residual electric quantity of the battery pack, reduce the energy waste and reduce the disassembly difficulty of the battery pack.
Description
Technical Field
The invention relates to the technical field of batteries of electric vehicles, in particular to a battery pack and a disassembly method thereof.
Background
With the increasing severity of global energy crisis and environmental pollution problems, electric vehicles are rapidly developing. The electric automobile uses electric power as a power source, and a large amount of rated fossil fuel can be saved by replacing a fuel engine with the electric motor. With the increasing maturity and development of electric automobile power battery technology, electric automobiles must become the main trend of automobile industry development in the future.
With the continuous improvement of the system integration level, the use of the gluing technology has become a trend, the application of the gluing technology has greatly improved the energy density of the battery pack, but the defect of the gluing technology is that the non-destructive disassembly is difficult, so that the maintenance of the battery pack and the echelon application after the battery pack is retired are limited, the current regulations prescribe that the battery pack must consider the echelon utilization and recovery, and the simple violent disassembly cannot exert the value of the battery to the maximum extent and does not meet the requirement of environmental protection, so the non-destructive disassembly of the battery pack of the gluing scheme is a difficult problem to be solved.
Meanwhile, when the battery pack is disassembled, the residual electric quantity of the battery pack needs to be released, the ignition risk in the disassembly process is avoided, the residual electric quantity is directly released through the power distribution cabinet in the current method, so that energy waste can be caused, and the reasonable use of the part of energy is a problem to be considered.
Disclosure of Invention
The present invention is directed to a battery pack and a disassembly method thereof, which solve the problems set forth in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a battery pack, comprising:
the box body is provided with a containing cavity;
The battery module is arranged in the accommodating cavity and comprises a plurality of electric 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 bonded with the first bonding layer and the second bonding layer respectively, 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 heating layer comprises a first input positive electrode, a first input negative electrode and a heating piece, wherein the first input positive electrode and the first input negative electrode are respectively and electrically connected with the heating piece, and the first input positive electrode and the first input negative electrode are respectively and electrically connected with the positive electrode and the negative electrode of the battery pack.
Further, the heating layer further comprises a second input positive electrode and a second input negative electrode, the second input positive electrode and the second input negative electrode are respectively and electrically connected with the heating piece, the second input positive electrode and the second input negative electrode can be electrically connected with an external power supply, and the external power supply supplies power for the heating layer.
Further, the heating elements are uniformly arranged in the self-heating bonding assembly, and the heating elements are heating wires or heating films.
Further, the battery pack heating device further comprises a control switch, wherein the control switch is arranged on the circuit of the battery pack and the heating piece and used for controlling the battery pack to supply power to or cut off power from the heating piece.
Further, hold the chamber and enclose by lateral wall and bottom plate and establish and form, 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 wears to establish the via hole will the crossbeam is fixed screw hole.
Further, the battery cell structure further comprises a gasket, wherein the outer envelope of each battery cell is in a cuboid shape, and when a plurality of battery cells are arranged, one gasket is arranged between every two battery cells.
Further, the gasket is a cuboid with a thin center and gradually thickened towards the edge.
Further, a method for disassembling a battery pack includes:
When the battery pack has sufficient electric quantity and the battery pack main loop is normal, connecting the anode and the cathode of the heating layer with the anode and the cathode of the battery pack respectively or connecting the anode and the cathode of the battery module respectively;
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, after a preset time is delayed, the battery pack is disassembled;
when the battery pack is sufficient in quantity but the main loop is not connected, determining the position of a fault battery cell through a battery management system;
if the number of the fault cells is one or more than one, the one or more than one fault cells are taken as nodes, and the cells of the battery pack are divided into two groups of cells;
the two groups of electric cores are connected in parallel or in series, and the anode and the cathode of the two groups of electric cores after being connected in parallel or in series are respectively and electrically connected with the anode and the cathode 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, after a preset time is delayed, the battery pack is disassembled;
If the fault battery cell is one battery cell and/or a plurality of continuous battery cells, dividing the battery cells which normally work into n groups by taking the fault battery cell as a node, connecting the n groups of battery cells which normally work in parallel or in series into new battery packs, and respectively connecting the anode and the cathode of the new battery packs which are connected in parallel or in series with the heating layer in two stages 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, after a preset time is delayed, the battery pack is disassembled;
the battery pack is insufficient in electric quantity, and the residual electric quantity cannot soften the adhesive layer;
The second output positive electrode and the second output negative electrode 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, after the preset time is delayed, the battery pack is disassembled.
Compared with the prior art, the invention has the beneficial effects that: the invention can lead the current high-integration battery to be disassembled nondestructively, prevent the thermal runaway of the battery pack from spreading, fully utilize the residual electric quantity of the battery pack, reduce the energy waste and reduce the disassembly difficulty of the battery pack.
Drawings
Fig. 1 is an exploded view of a battery pack according to an embodiment of the present invention;
Fig. 2 is a schematic view of a battery module according to an embodiment of the present invention;
Fig. 3 is a schematic diagram of a battery pack case according to an embodiment of the present invention;
FIG. 4 is a schematic view of a gasket according to an embodiment of the present invention;
FIG. 5 is a schematic view of a self-heating bonding assembly according to an embodiment of the present invention;
FIG. 6 is a flowchart illustrating a method for disassembling a battery pack with sufficient battery pack power and a normal battery pack main circuit according to an embodiment of the present invention;
FIG. 7 is a flowchart illustrating a method for disassembling a battery pack when the battery pack is sufficiently charged and the main circuit of the battery pack is not connected;
FIG. 8 is a flowchart of a method for disassembling one or more failed cells when the battery pack is sufficiently charged and the main circuit of the battery pack is not connected;
FIG. 9 is a flowchart of a disassembly method when the battery pack capacity is insufficient according to an embodiment of the invention;
fig. 10 is a flowchart of a battery pack disassembling method according to an embodiment of the invention.
In the figure: 100. a case; 200. a battery module; 300. a gasket; 400. a self-heating bonding assembly; 110. a cross beam; 120. a receiving 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 bottom plate; 1211. and (3) a threaded hole.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore 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 should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to the drawings in 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 electric core;
The self-heating adhesive assembly 400, the self-heating adhesive assembly 400 includes a heating layer 410, the heating layer 410 is powered by the battery module 200, and the battery module 200 is adhesively fixed in the receiving chamber 120 through the self-heating adhesive assembly 400.
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 the battery core needs to be disassembled, the heating layer of the self-heating structure bonding assembly converts electric energy of the battery core into heat energy, and heats the bonding layer to a softened state, so that the bonding strength of the bonding layer is reduced, and the battery core can be disassembled, thereby avoiding the safety risks such as deformation, damage, liquid leakage or short circuit and the like caused by forced disassembly.
Optionally, as shown in fig. 5, the self-heating adhesive assembly 400 further includes a first adhesive layer 420 and a second adhesive layer 430, and the heating layer 410 is adhered to the first adhesive layer 420 and the second adhesive layer 430, respectively.
Optionally, as shown in fig. 1, the heating layer 410 includes a first input positive electrode 411, a first input negative electrode 413, and a heating element 412, where the first input positive electrode 411 and the first input negative electrode 413 are electrically connected to the heating element 412, and the first input positive electrode 411 and the first input negative electrode 413 are electrically connected to the positive electrode and the negative electrode of the battery pack, respectively.
In the above embodiment, the heating element 412 may convert electric energy into heat energy, and heat the first adhesive layer 420 and the second adhesive layer 430 to soften them, thereby realizing non-destructive disassembly. Because the heat energy is sourced from the battery cell or the battery pack, no additional energy input is needed, and the independent energy consumption of disassembly is reduced.
Optionally, the heating layer 410 further includes a second input positive electrode and a second input negative electrode, where the second input positive electrode and the second input negative electrode are electrically connected to the heating element 412, respectively, and the second input positive electrode and the second input negative electrode may be electrically connected to an external power source, and the external power source supplies power to the heating layer 410.
Optionally, the heating elements 412 are uniformly arranged in the self-heating bonding assembly 400, and the heating elements 412 are heating wires or heating films.
Optionally, the battery pack also comprises a control switch, wherein the control switch is arranged on the loop of the battery pack and the heating piece and is used for controlling the battery pack to supply power to or cut off power from the heating piece.
Optionally, as shown in fig. 3, the accommodating cavity 120 is surrounded by a side wall and a bottom plate 121, the bottom plate 121 is provided with a threaded hole 1211, a beam 110 is provided in the accommodating cavity 120, the beam 110 is provided with a via hole 111, the beam 110 further includes a fastener, the fastener penetrates through the via hole 111 to fix the beam 110 in the threaded hole 1211, and the number of the via holes 111 depends on the required number of fasteners.
In the above embodiment, after the number of the electric cores meets the requirement, the detachable beam 110 is installed, and the electric cores are extruded by contacting with the electric cores, so as to fix the electric cores in the X direction.
Optionally, as shown in fig. 4, the battery cell further includes a spacer 300, wherein an outer envelope of the battery cell is in a cuboid shape, and when the plurality of battery cells are arranged, one spacer 300 is disposed between every two battery cells.
Alternatively, the gasket 300 is a rectangular parallelepiped having a thin center and gradually thicker toward the edges.
In the above embodiment, the gasket 300 is disposed between the cells to perform the function of heat insulation and insulation.
The gasket 300 is characterized in that the gasket 300 is projected as a rectangle, and the thickness of the gasket 300 is much smaller than the length and width dimensions, and the thickness of the cross section of the gasket 300 along the thickness direction is that the thickness of the edge is larger than the thickness in the middle.
The cuboid-shaped battery cell can be expanded in the middle when in use, the gasket 300 can provide a gap for the expansion in the middle of the battery cell, and meanwhile, the gasket 300 has the characteristics of insulation and heat insulation, can block heat transfer between the battery cells, and can delay the expansion of thermal runaway when in thermal runaway.
In another aspect of the present invention, a method for disassembling a battery pack includes the steps of:
As shown in fig. 6, when the battery pack is full in electric quantity and the battery pack main circuit 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;
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, after a preset time is delayed, the battery pack is disassembled;
As shown in fig. 7, when the battery pack is full but the main circuit is not in communication, determining the position of the failed battery cell through the battery management system S200;
S210, if one or more fault cells are provided, dividing the cells of the battery pack into two groups of cells by taking the one or more fault cells as nodes;
s220, connecting the two groups of electric cores in parallel or in series, and electrically connecting the anode and the cathode of the two groups of electric cores after being connected in parallel or in series with the anode and the cathode of the heating layer respectively 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, after a preset time is delayed, the battery pack is disassembled;
As shown in fig. 8, S300, if the failed battery cell is one battery cell and/or a plurality of continuous battery cells, the failed battery cell is taken as a node, the battery cells which normally work are divided into n groups, the n groups of normally working battery cells are connected in parallel or in series to form a new battery pack, and the positive electrode and the negative electrode of the new battery pack after being connected in parallel or in series are respectively and electrically connected with the two stages of the heating layer 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, after a preset time is delayed, the battery pack is disassembled;
as shown in fig. 9, S400, the battery pack is insufficient, and the remaining amount of electricity cannot soften the adhesive layer;
S410, electrically connecting an external power supply through a second output positive electrode and a second output negative electrode, 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, after the preset time is delayed, the battery pack is disassembled.
As shown in fig. 10, in steps S100 to S120 in the above embodiment, the electric quantity of the battery pack is used to heat the structural adhesive, and meanwhile, the battery management system collects the temperatures of each point in the battery pack, and delays for 30min after reaching the softening temperature T1 of the adhesive layer, so as to disassemble the structural adhesive;
Step 200-240, assume that there is a fault in one cell, at this time, the location of the faulty cell needs to be determined by a battery management system, and the faulty cell is taken as a node here, so that the cells in the battery pack are divided into two groups, and the output electrodes of the heating layer are respectively connected with the positive and negative electrodes of the two groups to perform electric energy conversion, and the bonding layer is heated. After the battery management system collects that each point in the battery pack reaches the softening temperature T1 of the bonding layer, the battery pack can be disassembled after delaying for 30 min. The processing thought is the same as that of one cell failure when multiple cells fail.
And S400-S430, when the residual electric quantity of the battery pack cannot soften the bonding layer, the bonding layer is electrically connected with an external power supply through the second output positive electrode and the second output negative electrode and used for heating the bonding layer, and the bonding layer can be disassembled after the temperature T1 is delayed for 30 min.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A method of disassembling a battery pack, wherein the battery pack comprises:
the box body is provided with a containing cavity;
The battery module is arranged in the accommodating cavity and comprises a plurality of electric cores;
The self-heating bonding assembly comprises a heating layer, a first bonding layer and a second bonding 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; 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; the heating layer comprises a first input positive electrode, a first input negative electrode, a second input positive electrode, a second input negative electrode and a heating piece, wherein the first input positive electrode and the first input negative electrode are respectively and electrically connected with the heating piece, and the first input positive electrode and the first input negative electrode are respectively and electrically connected with the positive electrode and the negative electrode of the battery pack; the second input positive electrode and the second input negative electrode are respectively and electrically connected with the heating element, and can be electrically connected with an external power supply for supplying power to the heating layer through the external power supply;
the disassembly method is characterized by comprising the following steps:
When the battery pack has sufficient electric quantity and the battery pack main loop is normal, connecting the anode and the cathode of the heating layer with the anode and the cathode of the battery pack respectively or connecting the anode and the cathode of the battery module respectively;
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, after a preset time is delayed, the battery pack is disassembled;
when the battery pack is sufficient in quantity but the main loop is not connected, determining the position of a fault battery cell through a battery management system;
if the number of the fault cells is one or more than one, the one or more than one fault cells are taken as nodes, and the cells of the battery pack are divided into two groups of cells;
the two groups of electric cores are connected in parallel or in series, and the anode and the cathode of the two groups of electric cores after being connected in parallel or in series are respectively and electrically connected with the anode and the cathode 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, after a preset time is delayed, the battery pack is disassembled;
If the fault battery cell is one battery cell and/or a plurality of continuous battery cells, dividing the battery cells which normally work into n groups by taking the fault battery cell as a node, connecting the n groups of battery cells which normally work in parallel or in series into new battery packs, and respectively connecting the anode and the cathode of the new battery packs which are connected in parallel or in series with the heating layer in two stages 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, after a preset time is delayed, the battery pack is disassembled;
the battery pack is insufficient in electric quantity, and the residual electric quantity cannot soften the adhesive layer;
The second output positive electrode and the second output negative electrode 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, after the preset time is delayed, the battery pack is disassembled.
2. The method of claim 1, wherein the heating elements are uniformly arranged in the self-heating bonding assembly, and the heating elements are heating wires or heating films.
3. The method of claim 1, further comprising a control switch mounted on the circuit of the battery pack and the heating element for controlling the battery pack to power the heating element or to power the heating element.
4. The method of claim 1, wherein the battery pack further comprises a cross beam, the receiving 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 through hole, and the cross beam further comprises a fastener penetrating the through hole to fix the cross beam in the threaded hole.
5. The method for disassembling a battery pack according to claim 1, wherein the battery pack further comprises a gasket, the outer envelope of the battery cells is in a cuboid shape, and one gasket is arranged between every two battery cells when the plurality of battery cells are arranged.
6. The method of disassembling a battery pack according to claim 5, wherein the gasket is a rectangular parallelepiped having a thin center and gradually thicker toward the edges.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111663802.7A CN114388976B (en) | 2021-12-31 | 2021-12-31 | Battery pack and disassembly method thereof |
| PCT/CN2022/119553 WO2023124267A1 (en) | 2021-12-31 | 2022-09-19 | Battery pack and disassembling method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111663802.7A CN114388976B (en) | 2021-12-31 | 2021-12-31 | Battery pack and disassembly method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114388976A CN114388976A (en) | 2022-04-22 |
| CN114388976B true CN114388976B (en) | 2024-07-05 |
Family
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| CN202111663802.7A Active CN114388976B (en) | 2021-12-31 | 2021-12-31 | Battery pack and disassembly method thereof |
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| WO (1) | WO2023124267A1 (en) |
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| CN114388976B (en) * | 2021-12-31 | 2024-07-05 | 中国第一汽车股份有限公司 | Battery pack and disassembly method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199099A (en) * | 2018-02-05 | 2018-06-22 | 北京长城华冠汽车科技股份有限公司 | A kind of battery protecting apparatus and its control method |
| CN112787033A (en) * | 2021-01-29 | 2021-05-11 | 东莞新能德科技有限公司 | Thermal anti-sticking protective film and electronic device using same |
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| JP2002184364A (en) * | 2000-12-19 | 2002-06-28 | Matsushita Electric Ind Co Ltd | Square cell and wrapping method of the same |
| US20140287299A1 (en) * | 2013-03-25 | 2014-09-25 | Apple Inc. | Heat-Debonding Adhesives |
| CN208444872U (en) * | 2018-05-03 | 2019-01-29 | 罗斌 | A kind of pack case body |
| TWI678243B (en) * | 2018-10-19 | 2019-12-01 | 國立臺南大學 | Recovery method of solar battery module (3) |
| CN109585976B (en) * | 2018-12-14 | 2020-11-03 | 蜂巢能源科技有限公司 | Battery module heating film, battery pack, lower shell of battery pack and battery pack assembling method |
| CN111081940A (en) * | 2020-01-09 | 2020-04-28 | 惠州亿纬锂能股份有限公司 | Battery box body structure, assembling and disassembling method thereof and storage battery |
| CN113523746B (en) * | 2021-05-26 | 2023-01-13 | 湖北亿纬动力有限公司 | Battery pack disassembling method |
| CN114388976B (en) * | 2021-12-31 | 2024-07-05 | 中国第一汽车股份有限公司 | Battery pack and disassembly method thereof |
| CN217035874U (en) * | 2022-02-23 | 2022-07-22 | 蜂巢能源科技股份有限公司 | Module lossless disassembling structure and battery pack |
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- 2021-12-31 CN CN202111663802.7A patent/CN114388976B/en active Active
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199099A (en) * | 2018-02-05 | 2018-06-22 | 北京长城华冠汽车科技股份有限公司 | A kind of battery protecting apparatus and its control method |
| CN112787033A (en) * | 2021-01-29 | 2021-05-11 | 东莞新能德科技有限公司 | Thermal anti-sticking protective film and electronic device using same |
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| CN114388976A (en) | 2022-04-22 |
| WO2023124267A1 (en) | 2023-07-06 |
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