Battery pack cover body disassembly method

Abstract

The application relates to the field of battery disassembly, and discloses a battery cover body disassembly method. The cover body comprises a body and a composite layer arranged on one side of the body and bonded with the battery. The method comprises the following steps: separating the edge of the cover body from the edge of the composite layer, and gradually disassembling the body from the position where the cover body and the composite layer are separated; and removing at least part of the composite layer. In the disassembly process, the edge of the cover body is first separated from the edge of the composite layer, and the cover body is torn off. At this time, the mechanical stress generated is mainly borne and buffered by the composite layer, so that the tensile force is not directly transmitted to the structural adhesive and the insulating film on the top of the battery, thereby preventing the phenomenon that the insulating film is torn due to the displacement of the structural adhesive under stress, and ensuring the integrity of the original insulating film of the battery.

Description

Technical Field

[0001] This application relates to the field of battery disassembly technology, specifically to a method for disassembling a battery pack cover. Background Technology

[0002] In the battery pack, the battery and the cover are fixed together with structural adhesive, which provides good sealing, but also brings many challenges to the subsequent disassembly operation. The disassembly method in related technologies is to first pry open the edge of the cover to create a gap, and then use lifting equipment to tear off the cover as a whole.

[0003] However, when disassembling in this way, the cover will deform significantly under tensile force, and its internal stress will also pull on the cured structural adhesive. After the structural adhesive shifts under force, it is easy to tear the insulating film surrounding the battery, damaging the original insulation protection structure. Once the insulating film is damaged, the battery is prone to insulation failure, affecting the battery's secondary use. Summary of the Invention

[0004] This application provides a method for disassembling a battery pack cover, in order to solve or improve the problem in related technologies where the battery insulation film is easily damaged during the disassembly of the battery pack cover.

[0005] In a first aspect, this application provides a method for disassembling a battery pack cover, the cover comprising a body and a composite layer disposed on one side of the body and bonded to the battery, the method comprising: Separate the edge of the cover from the edge of the composite layer, and gradually detach the body from the position where the cover and the composite layer are separated; Remove at least a portion of the composite layer.

[0006] Beneficial effects: During disassembly, the cover is first separated from the composite layer edge and the cover is then removed. The resulting mechanical stress is primarily absorbed and buffered by the composite layer, preventing the tensile force from being directly transmitted to the structural adhesive and insulating film on top of the battery. This prevents the insulating film from tearing due to displacement of the structural adhesive under stress, ensuring the integrity of the original insulating film. The composite layer is then cut and removed. Since the cover has been removed, the bonding stress between the composite layer and the underlying structural adhesive is relatively small, further reducing the possibility of secondary damage.

[0007] The disassembly method described in this application not only ensures the safety and insulation reliability of the battery during the repair process, making it possible to retain the original battery for targeted repairs, but also reduces the battery scrap rate caused by insulation failure. This reduces after-sales maintenance costs, avoids excessive resource depletion, and enhances the utilization value of the power battery throughout its entire life cycle. Furthermore, the composite layer not only improves the overall insulation protection capability of the battery pack, further strengthening its electrical safety, but also acts as a stress buffer structure, absorbing the forces generated by pulling and deformation when disassembling the cover, preventing stress from being transmitted downwards, and avoiding damage to the battery surface insulation film and structural adhesive. This achieves a balance between protection during the service life and protection during later maintenance and disassembly.

[0008] In one optional embodiment, separating the edge of the cover from the edge of the composite layer, and gradually detaching the cover from the point where the cover is separated from the composite layer, includes: Separate the edge of the first side of the cover from the edge of the composite layer, pull the cover open from the first side to the middle region of the cover, separate the edge of the second side of the cover from the edge of the composite layer, and pull the cover open from the second side to the middle region of the cover to completely detach the cover.

[0009] Beneficial effects: By using a side-by-side and alternating operation, the peeling process is broken down into two short-distance partial pulling processes, which can effectively save the cover pulling stroke, reduce the difficulty of operation, and reduce the requirements for hoisting equipment. Specifically, regardless of which side starts from, only the cover needs to be pulled from the edge to the middle to complete the half-separation. Compared with the method of pulling straight from one end to the other, the displacement distance of a single operation can be shortened by nearly 50%.

[0010] In one alternative implementation, removing at least a portion of the composite layer includes: Remove the portion of the composite layer that is not bonded to the battery by structural adhesive.

[0011] Beneficial Effects: By identifying and removing areas of the composite layer not bonded to the battery, selective material retention during repair and disassembly can be achieved. Since these gap areas of the composite layer do not participate in the battery's fixation or insulation functions, their existence is only for filling or process transitions; removal will not affect the structural integrity or electrical performance of the battery itself. Retaining the composite layer portions directly bonded to the battery not only maintains the battery's original insulation protection system but also avoids the risk of surface damage or tearing of the insulating film that might result from completely peeling off the composite layer. Furthermore, this selective removal method of the composite layer in this embodiment can reduce the pre-processing costs for battery reuse while ensuring that the recycled battery still has a packaging state that meets safety standards, allowing for rapid entry into testing, reassembly, or reuse processes.

[0012] In one alternative implementation, before removing at least a portion of the composite layer, the method further includes: Flip over the battery pack after removing the cover, and make the opening of the battery pack housing face horizontally or downward.

[0013] Beneficial effects: When the opening of the box is horizontal or downward, the debris, fragments and detached particles generated during the cutting, peeling or removal of the composite layer will fall outward naturally under the action of gravity, instead of falling inward into the box or the gaps between batteries. This can avoid the risk of foreign objects falling into and remaining in the gaps between battery packs, around the terminals or on the surface of the insulating film, avoid the hidden dangers of assembly interference caused by foreign object residue, ensure the cleanliness of the battery and its normal reuse, and reduce the cost of cleaning the inside of the box and the surface of the battery.

[0014] In an alternative embodiment, before separating the edge of the cover from the edge of the composite layer, the method further includes: Remove the connector between the cover and the battery pack housing.

[0015] Beneficial effects: The connector is a constraint structure that fixes the cover to the box. If it is not removed beforehand and an attempt is made to separate the edge of the cover from the composite layer, the rigid connection will prevent the cover from effectively lifting or shifting. Furthermore, external force may be forced to be transferred to the bonding interface of the composite layer, causing unexpected localized tearing or damage to the insulation film. Removing the connector in advance allows for better release of the cover, enabling it to move smoothly along the predetermined path during subsequent side-opening, ensuring that the separation force acts on the interface between the cover and the composite layer, rather than at the box connection point.

[0016] In one alternative embodiment, removing the connector between the cover and the battery pack housing includes: Remove the connecting pins between the cover and the housing. For example, drill out the rivets. Or loosen and remove the screws.

[0017] Beneficial effects: Compared to rough methods such as hammering, prying, or cutting, drilling removes the rivet body by rotating and cutting, which can avoid applying lateral shear force or impact load to the flange edge, cover sealing surface and surrounding composite layer of the box, thereby preventing box deformation and avoiding the problem of box deformation squeezing and deforming the battery.

[0018] In an optional embodiment, after separating the edge of the cover from the edge of the composite layer, the method further includes: The edge of the cover is folded away from the composite layer.

[0019] Beneficial effects: After the cover and composite layer initially separate, their edges are often still slightly taut, and the support points are insufficient for stable attachment by the lifting equipment. In this embodiment, folding the cover away from the composite layer to form a raised shape not only provides lifting points that can be connected to the lifting equipment, but also increases the lever arm length between the lifting points and the cover, making the lifting load more evenly distributed in the rigid area of ​​the cover and avoiding deformation or tearing caused by local stress concentration.

[0020] In an alternative embodiment, before separating the edge of the cover from the edge of the composite layer, the method further includes: Place the battery pack on the flip table and secure it. Before removing at least a portion of the composite layer, the process further includes: The battery pack, after the cover has been removed, is flipped over using the flipping platform, so that the opening of the battery pack box faces horizontally or downwards.

[0021] Beneficial effects: Pre-fixing the battery pack to the tilting table not only ensures the smooth and controllable subsequent tilting action, avoiding the risks of tipping and slippage caused by manual handling or simple support, but also allows the box to maintain rigid constraint at any angle, providing a stable working foundation for subsequent composite layer removal operations.

[0022] After removing the cover and before removing the composite layer, the tilting table can adjust the opening of the box to a horizontal or downward position and lock it in place, so that the gravity-assisted chip removal can continue to function.

[0023] In one optional embodiment, the cover is gradually detached from the position where it separates from the composite layer, including: Connect the hoisting equipment to the edge where the cover is separated from the composite layer, and use the hoisting equipment to pull the cover apart.

[0024] Beneficial effects: By setting connection holes at the edge of the separated cover and cooperating with hoisting equipment, the force-bearing point of the hoist can be precisely fixed in the separated area, and the tension can be applied smoothly without single-point force deviation or sudden increase in local stress. In addition, relying on the equipment to apply force at a uniform speed throughout the process, the magnitude and direction of the tension can be controlled, which can avoid impact loads caused by uneven force, reduce deformation and stress transmission to the composite layer and battery end, and protect the insulating film from damage.

[0025] In one alternative implementation, removing at least a portion of the composite layer includes: cutting the portion of the composite layer that is not bonded to the battery by structural adhesive using ceramic scissors; And / or, separating the edge of the cover from the edge of the composite layer includes: inserting a pry bar between the cover and the composite layer and prying the cover and the composite layer apart.

[0026] Beneficial Effects: Using ceramic shears to cut non-bonded areas of the composite layer, the excellent insulation properties of ceramic eliminate the risk of electrical conductivity during operation, preventing accidental contact with the battery or terminals that could cause short circuits. Furthermore, the sharp edge of the ceramic shears ensures smooth cutting and clean cuts, minimizing pulling or tearing, and preventing force from being transmitted to the bonded area and damaging the battery insulation structure. Simultaneously, the wear-resistant and non-shaving material of ceramic prevents debris from remaining on the casing or battery surface, further ensuring battery cleanliness. Using a pry tool inserted into the gap between the two layers allows for precise application of force at the interface between the cover and the composite layer, preventing direct force on the battery and insulation film. This localized prying operation, with its small movement and concentrated force, smoothly separates the edges of the cover, avoiding additional stress from large-area pulling, protecting the battery insulation film underneath. The operation is simple and convenient, facilitating the rapid creation of a working gap, creating conditions for subsequent lifting and removal procedures. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a flowchart illustrating the battery pack cover disassembly method provided in an embodiment of this application. Figure 2 This is a schematic diagram showing the battery pack after its cover has been removed, as provided in an embodiment of this application.

[0029] Explanation of reference numerals in the attached figures: 1. Battery pack; 101. Main body; 102. Housing; 103. Battery; 104. Composite layer. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] During the use of new energy vehicles, collisions to the battery pack housing can occur when driving on special road sections, encountering abnormal road conditions, or due to improper user operation. Severe bottom impacts can cause mechanical damage to the housing, ultimately leading to substandard overall airtightness of the battery pack. Battery packs have extremely high requirements for sealing; under previous technological conditions, such faults could not be repaired or replaced at the individual component level. Once a failure occurred, the entire battery pack had to be replaced.

[0032] Replacing the entire battery pack is costly and wasteful of resources. With technological advancements, the solution presented in this application allows for targeted repairs, replacing only the top cover and casing while retaining the original batteries for reuse. This solution reduces after-sales maintenance costs and prevents excessive resource depletion.

[0033] In the battery packs of this technology, the battery and the cover are fixed together with structural adhesive, resulting in good assembly and sealing. However, this also presents many challenges for subsequent disassembly. The disassembly method in this technology involves first prying open the edge of the cover to create a gap, and then using lifting equipment to tear off the cover as a whole.

[0034] However, when disassembling in this way, the cover will deform significantly under tensile force, and its internal stress will also pull on the cured structural adhesive. After the structural adhesive shifts under force, it is easy to tear the insulating film on the top of the battery, damaging the original insulation protection structure. After the insulating film is damaged, the battery is prone to insulation failure, affecting the battery's secondary use.

[0035] In order to solve or improve the problem that the battery insulation film is easily damaged during the disassembly of the battery pack cover in related technologies, this application provides a method for disassembling the battery pack cover.

[0036] The following is combined Figures 1 to 2 This application describes a method for disassembling the battery pack cover provided in an embodiment.

[0037] Specifically, the battery pack 1 to which the battery pack cover disassembly method is applicable has a cover comprising a body 101 and a composite layer 104 disposed on one side of the body 101 and bonded to the battery 103. The composite layer 104 is disposed between the body 101 and the battery 103, that is, the composite layer 104 is disposed on the side of the body 101 closest to the battery 103, and the outer side of the battery 103 is covered with an insulating film. The body 101 can be a steel plate.

[0038] Accordingly, the battery pack cover disassembly method includes steps S10 to S20.

[0039] In step S10, the edge of the body 101 is separated from the edge of the composite layer 104, and the body 101 is gradually detached from the position where the body 101 and the composite layer 104 are separated.

[0040] Specifically, the edge of the main body 101 is pried apart from the edge of the composite layer 104, and the main body 101 is gradually disassembled from the position where the main body 101 and the composite layer 104 are separated by hoisting equipment, for example, by pulling it apart or tearing it off.

[0041] Step S20: Remove at least a portion of the composite layer 104.

[0042] Specifically, at least a portion of the composite layer 104 is cut away.

[0043] In this embodiment, the battery pack cover disassembly method can effectively avoid the risk of damage to the insulation protection structure of the battery 103 by sequentially disassembling the body 101 and the composite layer 104.

[0044] Specifically, during the disassembly process, the body 101 is first separated from the edge of the composite layer 104 and the body 101 is then torn off. The resulting mechanical stress is primarily absorbed and buffered by the composite layer 104, preventing the tensile force from being directly transmitted to the structural adhesive and insulating film on top of the battery 103. This prevents the insulating film from tearing due to displacement of the structural adhesive under stress, ensuring the integrity of the original insulating film of the battery 103. The composite layer 104 is then cut and removed. Since the body 101 has been removed, the bonding stress between the composite layer 104 and the underlying structural adhesive is relatively small, further reducing the possibility of secondary damage.

[0045] Therefore, the disassembly method of this application can not only ensure the safety and insulation reliability of battery 103 during the maintenance process, making it possible to retain the original battery 103 for targeted maintenance, but also reduce the scrap rate of battery 103 due to insulation failure. While reducing after-sales maintenance costs, it avoids excessive resource consumption and enhances the utilization value of power battery 103 throughout its entire life cycle.

[0046] In addition, the composite layer 104 can not only improve the overall insulation protection capability of the battery pack 1 and further enhance the electrical safety of the battery pack 1, but also act as a stress buffer structure. When disassembling the main body 101, it can bear the force generated by pulling and deformation, block the downward transmission of stress, and avoid damage to the insulating film and structural adhesive on the surface of the battery 103. It can take into account both the protective function during the use stage and the protective effect during later maintenance and disassembly.

[0047] In some embodiments provided in this application, the battery 103 is configured as a blade battery 103, that is, the positive and negative terminals of the battery 103 are respectively disposed at both ends of the battery 103, and the outer side of the battery 103 is covered with an insulating film. One sidewall of the battery 103 is bonded to the composite layer 104 on the body 101.

[0048] In this embodiment, since the terminal post is far from the disassembly area of ​​the main body 101, the risk of tools or stress accidentally touching live parts during the separation of the main body 101 and the composite layer 104 can be reduced, improving the safety of maintenance operations. Simultaneously, the battery 103 is bonded to the polyurethane composite layer 104 on the main body 101 only through one sidewall. Combined with the buffering properties of the polyurethane layer, mechanical loads are more controllably transmitted along the sidewall, reducing the risk of lateral tensile and shear damage to the insulating film. Furthermore, the blade battery 103 itself has high structural rigidity and dimensional stability, and is not prone to torsional deformation when subjected to lateral adhesive stress, thereby further ensuring the integrity of the insulating film's adhesion.

[0049] In some embodiments provided in this application, the edge of the body 101 is separated from the edge of the composite layer 104, and the body 101 is gradually detached from the position where the body 101 and the composite layer 104 are separated, including: Separate the edge of the first side of the body 101 from the edge of the composite layer 104, pull the body 101 from the first side to the middle region of the body 101, separate the edge of the second side of the body 101 from the edge of the composite layer 104, and pull the body 101 from the second side to the middle region of the body 101 to completely detach the body 101.

[0050] Specifically, the edge of the first side of the body 101 is first separated from the edge of the composite layer 104. After the body 101 is pulled apart from the first side to the middle region of the body 101, the edge of the second side of the body 101 is separated from the edge of the composite layer 104. The body 101 is then pulled apart from the second side to the middle region of the body 101 to completely tear off the body 101.

[0051] Alternatively, first separate the edge of the first side of the body 101 from the edge of the composite layer 104, then separate the edge of the second side of the body 101 from the edge of the composite layer 104, then pull the body 101 from the first side to the middle region of the body 101, and then pull the body 101 from the second side to the middle region of the body 101 to tear off the body 101 as a whole.

[0052] Alternatively, first separate the edge of the first side of the body 101 from the edge of the composite layer 104, then separate the edge of the second side of the body 101 from the edge of the composite layer 104, then pull the body 101 from the second side to the middle region of the body 101, and then pull the body 101 from the first side to the middle region of the body 101 to tear off the body 101 as a whole.

[0053] In this embodiment, by using a side-by-side and alternating operation, the peeling step is divided into two short-distance local pull-out processes, which can effectively save the pull-out stroke of the main body 101, reduce the difficulty of operation, and reduce the requirements for the hoisting equipment.

[0054] Specifically, regardless of which side you start from, you only need to pull the body 101 from the edge to the middle to complete the half separation. Compared to pulling it straight from one end to the other, the displacement distance in a single operation can be shortened by nearly 50%.

[0055] Furthermore, if a long-stroke continuous stretching operation is used, as the peeling range continues to expand, the separated section of the flexible body 101 will undergo bending deformation, causing a change in the lever arm and a shift in the load transmission path. This will cause the stress concentration area to extend to the unpeeled area and is also prone to stress wave accumulation. The composite layer 104 is an elastic material, which will exhibit creep under continuous large displacement loading conditions, and the uneven energy dissipation will further exacerbate the disordered stress distribution at the bonding interface.

[0056] This embodiment, by disassembling the main body 101 in sections, not only reduces the peak pulling force required for the operation but also controls the force within a localized range, avoiding excessive cumulative shear stress between the composite layer 104 and the insulating film of the battery 103 caused by long-stroke pulling. The composite layer 104 has excellent buffering and stress dispersion capabilities; short-stroke, side-by-side pulling can fully utilize its flexible energy-absorbing properties, further reducing the probability of damage to the insulating film. Furthermore, this embodiment allows for flexible selection of various operating sequences, adapting to different working spaces and tool conditions, ensuring disassembly efficiency while reducing unnecessary working strokes, and improving the accuracy and safety of maintenance operations.

[0057] In some embodiments provided in this application, removing at least a portion of the composite layer 104 includes: Remove the portion of composite layer 104 that is not bonded to battery 103 by structural adhesive.

[0058] Specifically, refer to Figure 2 The portion of the composite layer 104 that is not bonded to the battery 103 by structural adhesive includes at least the gap between the battery 103 groups and the gap between the battery 103 and the inner wall of the battery pack 1 housing 102.

[0059] In this embodiment, by identifying and removing the areas of the composite layer 104 that are not bonded to the battery 103, selective material retention during the repair and disassembly process can be achieved. Since the composite layer 104 in these gap areas does not participate in the fixing or insulation function of the battery 103, its existence is only for filling or process transition, and its removal will not affect the structural integrity and electrical performance of the battery 103 itself. Retaining the portion of the composite layer 104 that is directly bonded to the battery 103 not only maintains the original insulation protection system of the battery 103, but also avoids the risk of surface damage or tearing of the insulating film that may result from completely peeling off the composite layer 104.

[0060] Furthermore, the selective removal of the composite layer 104 in this embodiment can reduce the pre-processing cost of reusing the battery 103, while ensuring that the recycled battery 103 still has a packaging state that meets safety standards, and can quickly enter the testing, reassembly or reuse process.

[0061] In some embodiments provided in this application, before removing at least a portion of the composite layer 104, the process further includes: Flip over the battery pack 1 after removing the main body 101, and make the opening of the battery pack 1 housing 102 face horizontally or downward.

[0062] Specifically, after removing the main body 101, the battery pack 1 is flipped over so that its opening faces horizontally or downwards.

[0063] In this embodiment, when the opening of the box is facing horizontally or downward, the debris, fragments, and detached particles generated during the cutting, peeling, or removal of the composite layer 104 will naturally fall outward under gravity, rather than falling inward into the interior of the box 102 or the gaps between the batteries 103. This avoids the risk of foreign objects easily falling into and remaining in the gaps between the battery 103 groups, around the terminals, or on the surface of the insulating film, and avoids potential assembly interference caused by foreign object residue. This ensures the cleanliness of the battery 103 and its subsequent normal reuse, and also reduces the cost of cleaning the interior of the box 102 and the surface of the battery 103.

[0064] In some embodiments provided in this application, before separating the edge of the body 101 from the edge of the composite layer 104, the method further includes: Remove the connector between the main body 101 and the casing 102 of the battery pack 1.

[0065] Specifically, the rivets between the main body 101 and the housing 102 can be removed.

[0066] In this embodiment, the connector is a constraint structure that fixes the body 101 to the housing 102. If the connector is not removed beforehand and an attempt is made to separate the edge of the body 101 from the composite layer 104, the rigid connection will prevent the body 101 from effectively lifting or shifting. Furthermore, external forces may be forced to be transmitted to the bonding interface of the composite layer 104, causing unexpected localized tearing or damage to the insulating film. Removing the connector in advance allows for better release of the body 101, enabling it to move smoothly along a predetermined path during the subsequent side-by-side separation process. This ensures that the separation force acts on the interface between the body 101 and the composite layer 104, rather than at the connection point of the housing 102.

[0067] In some embodiments provided in this application, removing the connector between the body 101 and the casing 102 of the battery pack 1 includes: Remove the connecting rivets between the body 101 and the housing 102. For example, drill out the rivets between the body 101 and the housing 102. Specifically, the rivets can be drilled through with an electric drill to eliminate the connecting constraint force of the rivets. Alternatively, loosen and remove the screws between the body 101 and the housing 102.

[0068] In this embodiment, compared to rough methods such as hammering, prying, or cutting, drilling removes the rivet body by rotating and cutting, which can avoid applying lateral shear force or impact load to the flange edge of the housing 102, the sealing surface of the body 101, and the surrounding composite layer 104, thereby preventing the housing 102 from deforming and avoiding the problem of the housing 102 deforming and squeezing the battery 103 to deform.

[0069] In some embodiments provided in this application, after separating the edge of the body 101 from the edge of the composite layer 104, the method further includes: The edge of the body 101 is folded away from the composite layer 104.

[0070] Specifically, the edge of the body 101 is folded away from the composite layer 104 to raise it, so as to connect the hoisting equipment to the raised part of the body 101.

[0071] In this embodiment, after the body 101 and the composite layer 104 are initially separated, their edges are often still slightly taut, and the support points are insufficient for the lifting device to stably attach. In this embodiment, folding the body 101 away from the composite layer 104 to form a raised shape not only provides a lifting point that can be connected to the lifting device, but also increases the lever arm length between the lifting point and the body 101, so that the lifting load is more evenly distributed in the rigid area of ​​the body 101, avoiding deformation or tearing caused by local stress concentration.

[0072] In some embodiments provided in this application, before separating the edge of the body 101 from the edge of the composite layer 104, the following steps are also included: Place the battery pack 1 on the flipping table and secure it. Specifically, the battery pack 1 can be secured to the flipping table using a fixing clamp.

[0073] Accordingly, before removing at least a portion of the composite layer 104, the process further includes: The battery pack 1, after being removed from the main body 101, is flipped over using a flipping table, and the opening of the battery pack 1 housing 102 is oriented horizontally or downwards.

[0074] In this embodiment, the battery pack 1 is pre-fixed to the flipping table, which not only ensures the smooth and controllable operation of the subsequent flipping action and avoids the risk of overturning or slipping caused by manual handling or simple support, but also allows the box 102 to maintain rigid constraint at any angle, providing a stable working basis for the subsequent removal of the composite layer 104.

[0075] After removing the main body 101 and before removing the composite layer 104, the tilting table can adjust the opening of the box to a horizontal or downward orientation and lock it in this position, allowing gravity-assisted chip removal to continue to function. Specifically, when the opening is horizontal or downward, the debris, fragments, and detached particles generated during the cutting, peeling, or removal of the composite layer 104 will naturally fall outward under gravity, rather than falling inward into the box 102 or the gaps between the batteries 103. This avoids the risk of foreign objects easily falling into and remaining in the gaps between the battery 103 groups, around the terminals, or on the surface of the insulating film, avoiding potential assembly interference caused by foreign object residue, ensuring the cleanliness of the batteries 103 and their subsequent normal reuse, and reducing the cost of cleaning the inside of the box 102 and the surface of the batteries 103.

[0076] In some embodiments provided in this application, the body 101 is gradually detached from the position where it separates from the composite layer 104, including: The hoisting equipment is connected to the edge separating the main body 101 and the composite layer 104, and the main body 101 is pulled apart and removed by the hoisting equipment.

[0077] Specifically, a connection hole can be made at the edge where the main body 101 separates from the composite layer 104, and then the lifting device's lifting attachment can be connected to the connection hole on the main body 101. The main body 101 can then be pulled apart using the lifting device. Optionally, the lifting device can be a crane, and the lifting attachment can be a hook.

[0078] In this embodiment, connecting holes are provided at the edge of the separated body 101 and used in conjunction with lifting equipment. The force-bearing point of the lifting device can be precisely fixed in the separated area, and the tension can be applied smoothly without single-point force deviation or sudden increase in local stress. In addition, the lifting equipment applies force at a uniform speed throughout the process, and the magnitude and direction of the tension are controllable. This avoids impact loads caused by uneven force, reduces deformation and stress transmission to the composite layer 104 and battery 103, and protects the insulating film from damage.

[0079] In some embodiments provided in this application, removing at least a portion of the composite layer 104 includes: cutting the portion of the composite layer 104 that is not bonded to the battery 103 by structural adhesive using ceramic scissors.

[0080] In this embodiment, ceramic scissors are used to cut the non-bonded areas of the composite layer 104. The ceramic material has excellent insulation properties, eliminating the risk of electrical conductivity during operation and preventing accidental contact with the battery 103 or terminals that could cause a short circuit. Furthermore, the sharp blades of the ceramic scissors provide smooth cutting and clean cuts, minimizing pulling or tearing, thus preventing force from being transmitted to the bonded areas and damaging the insulation structure of the battery 103. Simultaneously, the ceramic material is wear-resistant and does not easily produce debris, preventing impurities from remaining on the surface of the housing 102 or the battery 103, further ensuring the cleanliness of the battery 103.

[0081] In some embodiments provided in this application, separating the edge of the body 101 from the edge of the composite layer 104 includes: inserting a pry tool between the body 101 and the composite layer 104, and prying the body 101 and the composite layer 104 apart. Optionally, the pry tool includes, but is not limited to, a pry bar, a crowbar, a pry plate, a flat chisel, and a chisel.

[0082] In this embodiment, using a pry tool inserted into the gap between the two layers allows for precise targeting of the force application at the interface between the main body 101 and the composite layer 104, preventing the force from directly affecting the battery 103 and the insulating film. This localized prying operation, with its small movement and concentrated force, smoothly separates the edges of the main body 101, avoiding additional stress from large-area pulling and protecting the insulating film of the underlying battery 103. Furthermore, the operation is simple and convenient, facilitating the rapid creation of a working gap and paving the way for subsequent lifting and removal procedures.

[0083] It is understood that the technical features in the above embodiments can be referenced and combined with each other. For example, in some embodiments provided in this application, the battery pack cover disassembly method includes: Step 1: Place battery pack 1 on the flip table and secure it.

[0084] The second step is to remove the rivets between the main body 101 and the box 102 using an electric drill.

[0085] Third, using a pry bar, separate the first edge of the main body 101 from the edge of the composite layer 104, and fold the first edge away from the composite layer 104. Connect the lifting equipment to the first edge and use the lifting equipment to pull the main body 101 from the first side to the middle area of ​​the main body 101. Using a pry bar, separate the second edge of the main body 101 from the edge of the composite layer 104, and fold the second edge away from the composite layer 104. Connect the lifting equipment to the second edge and use the lifting equipment to pull the main body 101 from the second side to the middle area of ​​the main body 101 to tear off the main body 101.

[0086] Step 4: Flip the battery pack 1 after removing the main body 101 using the flipping table, and make the opening of the battery pack 1 box 102 face horizontally or downward.

[0087] Step 5: Use ceramic scissors to cut the portion of composite layer 104 that is not bonded to battery 103 with structural adhesive.

[0088] In this embodiment, the battery pack 1 is first secured using a flipping table, resulting in greater operational stability. Rivets are removed using an electric drill, reliably severing the mechanical connection between the body 101 and the housing 102, preventing additional stress from forced pulling of the connectors. A pry tool is used to partially separate the body 101 from the edge of the composite layer 104, allowing for more precise force application. Then, using lifting equipment, the body 101 is gradually torn away from both sides towards the center, shortening the single pulling stroke, evenly distributing tensile and deformation stress, and reducing the risk of the insulating film being torn. Subsequently, the orientation of the housing 102 is adjusted using the flipping table to prevent debris from falling into the housing 102 or adhering to the surface of the battery 103. Finally, ceramic shears are used to cut the non-bonded areas of the composite layer 104. The insulating properties of the ceramic shears eliminate the risk of short circuits without disturbing the bonding area between the composite layer 104 and the battery 103 or the original protective structure.

[0089] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0090] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0091] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0092] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for disassembling a battery pack cover, characterized in that, The cover includes a body (101) and a composite layer (104) disposed on one side of the body (101) and bonded to the battery (103). The method includes: Separate the edge of the body (101) from the edge of the composite layer (104), and gradually detach the body (101) from the position where the body (101) and the composite layer (104) are separated; At least a portion of the composite layer (104) is removed.

2. The method for disassembling the battery pack cover according to claim 1, characterized in that, Separating the edge of the body (101) from the edge of the composite layer (104), and gradually detaching the body (101) from the point where the body (101) and the composite layer (104) separate, including: Separate the edge of the first side of the body (101) from the edge of the composite layer (104), separate the body (101) from the first side to the middle region of the body (101), separate the edge of the second side of the body (101) from the edge of the composite layer (104), and pull the body (101) from the second side to the middle region of the body (101) to completely detach the body (101).

3. The method for disassembling the battery pack cover according to claim 1, characterized in that, After separating the edge of the body (101) from the edge of the composite layer (104), the process further includes: The edge of the body (101) is folded away from the composite layer (104).

4. The method for disassembling the battery pack cover according to claim 1, characterized in that, Removing at least a portion of the composite layer (104) includes: Remove the portion of the composite layer (104) that is not bonded to the battery (103) by the structural adhesive.

5. The method for disassembling the battery pack cover according to claim 1, characterized in that, Before removing at least a portion of the composite layer (104), the method further includes: Flip over the battery pack (1) after removing the main body (101) and make the opening of the box (102) of the battery pack (1) face horizontally or downward.

6. The method for disassembling the battery pack cover according to claim 1, characterized in that, Before separating the edge of the body (101) from the edge of the composite layer (104), the method further includes: Remove the connector between the main body (101) and the housing (102) of the battery pack (1).

7. The method for disassembling the battery pack cover according to claim 6, characterized in that, Removing the connector between the main body (101) and the housing (102) of the battery pack (1) includes: Remove the connecting pins between the main body (101) and the box (102).

8. The method for disassembling the battery pack cover according to any one of claims 1-7, characterized in that, Before separating the edge of the body (101) from the edge of the composite layer (104), the method further includes: Place the battery pack (1) on the flip table and secure it; Before removing at least a portion of the composite layer (104), the method further includes: The battery pack (1) after the main body (101) has been removed is flipped over by the flipping table, and the opening of the box (102) of the battery pack (1) is oriented horizontally or downward.

9. The method for disassembling the battery pack cover according to any one of claims 1-7, characterized in that, The body (101) is gradually detached from the position where it separates from the composite layer (104), including: The hoisting equipment is connected to the edge separating the body (101) and the composite layer (104), and the body (101) is pulled apart and removed by the hoisting equipment.

10. The method for disassembling the battery pack cover according to any one of claims 1-7, characterized in that, Removing at least a portion of the composite layer (104) includes: cutting the portion of the composite layer (104) that is not bonded to the battery (103) by structural adhesive using ceramic scissors; And / or, separating the edge of the body (101) from the edge of the composite layer (104) includes: inserting a pry bar between the body (101) and the composite layer (104) and prying the body (101) and the composite layer (104) apart.

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