Method for disassembling retired potting power battery

Abstract

The invention discloses a method for disassembling a retired potting power battery. The method comprises a cutting process and a folding process, the cutting process is used for cutting off the left and right side plates of the retired power battery pack after the upper cover is removed, and the folding process is used for folding the bottom plate of the retired power battery pack after the left and right side plates are cut off, so that the glue pouring acting force between the battery modules in each column is damaged, and the battery modules in each column are independently separated. By adopting the method for disassembling the retired glue-filled power battery, a sol agent does not need to be injected, pollution to the environment is avoided, low-temperature treatment of the battery module is not needed, and great potential safety hazards to the battery module are avoided.

Description

Technical Field

[0001] The invention relates to a disassembly technology of retired power batteries, belonging to the field of green environmental protection technology, and in particular to a disassembly method of retired glue-filled power batteries. Background Art

[0002] In recent years, my country's new energy industry has developed rapidly. The electric vehicle power batteries put into use earlier will be retired one after another, and the problem of increasing solid waste of waste power batteries has become increasingly prominent.

[0003] During the disassembly or recycling of retired power batteries, the battery module needs to be disassembled from the battery pack shell and then undergo a series of tests. At present, after the battery module of retired power batteries is assembled into the battery pack shell, a certain amount of potting glue will be added to the bottom of the shell for the safety of the battery. There is potting glue between the module and the bottom of the shell, and between the modules. Because the potting glue has a very good bonding effect, it is difficult to safely remove the battery module from the battery pack during the recycling of power batteries.

[0004] There are currently two ways to solve this problem:

[0005] 1. Add sol, dissolve the potting glue by chemical method and then take out the battery module. The disadvantage is that the sol has a pungent smell, which may cause health problems and environmental pollution.

[0006] 2. Take out the battery module after freezing it for more than 4 hours in an environment below -35℃. The disadvantage is that after taking out the frozen battery module, condensation water will appear on the surface of the battery module in a normal temperature environment, which will cause a greater safety hazard to the battery.

[0007] Therefore, the prior art has defects and needs to be improved. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a method for disassembling retired glue-filled power batteries in view of the deficiencies in the prior art.

[0009] The technical solution of the present invention is as follows:

[0010] A method for disassembling retired glue-filled power batteries comprises a cutting process and a folding process; the cutting process is used to cut off the left and right side panels of the retired power battery pack after the upper cover has been removed, and the folding process is used to fold the bottom plate of the retired power battery pack with the left and right side panels cut off, so that the glue-filling force between each column of battery modules is destroyed and each column of battery modules is separated independently.

[0011] The method for disassembling retired glue-filled power batteries is such that after folding, the battery pack shell is deformed from its original flat shape to a polygonal shape, and each side has a row of independent modules on the outside.

[0012] In the disassembly method of retired glue-filled power batteries, the folding process is implemented by a folding device, which includes a base, a sliding platform, a linear motor, a gantry, a clamping cylinder and a stretching cylinder; a guide groove is arranged on the upper surface of the base to support and guide the forward and backward movement of the sliding platform; a linear motor is installed in the base to drive the movement of the sliding platform; two groups of cylinders are arranged on the gantry, one group is a clamping cylinder arranged left and right, and the other group is a stretching cylinder arranged front and back; the clamping cylinder The cylinder is connected to the gantry, the piston rod head is fastened to the pressure rod, and the up and down movement of the compression cylinder piston rod drives the pressure rod to move up and down, thereby loosening and compressing a module of the battery pack; the cylinder barrel of the stretching cylinder is hinged to the gantry through a hinge earring, the piston rod head is connected to the hook, and the hook is connected to the front / rear side panel of the battery pack shell. When the stretching cylinder is stretched, an upward pulling force is applied to the side panel, so that the bottom plate of the retired power battery pack can be folded, so that the glue between each column of battery modules is torn, and each column of battery modules is separated independently.

[0013] The method for disassembling retired glue-filled power batteries, the folding process specifically includes the following steps: A1, placing the battery pack with the side panels on both sides cut off on the sliding platform, with the battery module facing down and the battery pack shell facing up; A2, starting the linear motor to drive the sliding platform so that the second column of modules in the battery pack is located below the pressure rod; A3, starting the hydraulic system, driving the piston rod of the clamping cylinder to extend, and after clamping the second column of modules in front, driving the piston rod of the front stretching cylinder to extend, hooking the wire rope on the stretching cylinder rod head and fastening it to the front shell of the module, driving the piston rod of the stretching cylinder to retract, thereby stretching the battery pack shell upward / obliquely upward, the shell is deformed under the action of the clamping force and the tensile force, and partially folded upward, so that the first column of modules in front and the second column of modules overcome the bonding force of the sealing glue between them and detach; A4, then, the clamping cylinder piston rod is retracted, the linear motor works, the sliding platform moves forward a distance of a module, the clamping cylinder piston rod is extended, and the third column of modules is clamped, and the above-mentioned actions are repeated so that the second column The potting glue between the first and third row of modules is detached, and the remaining modules are operated in turn to make the modules in the front half of the battery pack independent; A5, the piston rod of the clamping cylinder is retracted, the linear motor works, and the sliding platform moves forward to the second row of modules in the rear half of the battery pack, which is located under the clamping rod. The clamping module drives the piston rod of the rear stretching cylinder to extend, and the wire rope on the rod head is hooked to fasten it to the rear shell of the battery pack. The piston rod of the stretching cylinder is driven to retract, and the battery pack shell is stretched diagonally upward. The shell is deformed under the action of the clamping force and the pulling force. The battery pack is partially folded upward, so that the first and second row modules at the rear overcome the bonding force of the potting glue between them and separate. According to the method of folding the first half of the modules mentioned above, the rear half of the battery pack is folded in sequence, so that the battery pack shell is deformed from its original flat shape to a polygonal shape after folding, and each side is a row of independent modules on the outside. At this time, the module and the battery pack shell are only bonded to the bottom by the potting glue. The module is removed from the shell and then enters the production line for module cascade utilization for normal operation.

[0014] By adopting the above scheme, the present invention cuts off the side panels on the module through a cutting process; folds the battery pack shell into a polygon through the action of the pressing cylinder and the stretching cylinder in the folding process, so that each module is separated independently; the folding process realizes the movement of the sliding platform through a linear motor, and realizes the folding action after pressing different modules; the stretching cylinder in the folding process is connected to the gantry through the bearing seat, so that the cylinder can stretch the side panel of the battery pack shell obliquely upward at any angle.

[0015] By adopting the solution of the present invention, there is no need to add a sol, thus avoiding environmental pollution, and no need for low temperature, thus avoiding major safety hazards to the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the structural diagram of the cutting equipment;

[0017] Figure 2 The structural diagram of the cutting equipment after the upper platform is hidden;

[0018] Figure 3 This is the structural diagram of the slide module;

[0019] Figure 4 This is a schematic diagram of the folding device before it starts folding;

[0020] Figure 5 is a schematic diagram of the front half after being folded by the folding device;

[0021] Figure 6 This is the structure diagram of the linear motor and rack;

[0022] Figure 7 This is a real picture of the battery pack after removing the upper cover but before folding it;

[0023] Figure 8 The battery pack is folded by the device of the present invention, and each column of modules is independent.

[0024] 10 glue-filling power battery pack module, 11 tightening cylinder, 12 limiter, 13 platform slotting, 14 sawing motor, 15 slide module, 16 saw blade; 20 base, 21 sliding platform, 22 gantry, 23 clamping cylinder, 24 stretching cylinder, 25 track, 26 slide, 27 stepping motor, 28 linear motor, 29 rack; DETAILED DESCRIPTION

[0025] The present invention is described in detail below in conjunction with specific embodiments.

[0026] refer to Figure 1-4 The disassembly device of retired glue-filled power batteries includes a cutting device and a folding device; the cutting device is used to cut off the left and right side panels of the retired power battery pack after the upper cover has been removed, and the folding device is used to fold the bottom plate of the retired power battery pack with the left and right side panels cut off, so that the glue-filling force between each column of battery modules is destroyed, and each column of battery modules is separated independently.

[0027] The cutting device includes a base, a fixed platform, a tightening cylinder 11, a stopper 12, a slide module 15, a sawing motor 14, a saw blade 16, etc. The stopper 12 and the tightening cylinder 11 are respectively installed on both sides of the fixed platform ( Figure 1 The front and rear sides are shown), the stopper 12 and the tightening cylinder 11 correspond one to one, the battery pack side plate is located on the outside of the platform slot 13, and the glue-filled power battery pack module 10 is located on the inside of the platform slot 13;

[0028] The slide module 15 includes a track 25, a slide 26, and a stepper motor 27. The track 25 is fixed on the base, and the slide 26 and the track 25 are slidably matched; the sawing motor 14 is fixed on the slide 26, the sawing motor 14 drives the saw blade 16 to rotate, and the stepper motor 27 drives the slide 26 along the track 25 The sawing motor 14 moves along with the slide 26, and the rotating saw blade 16 moves along the platform slot 13 to cut off the side panel of the battery pack.

[0029] The platform slot 13 is arranged on one side of the fixed platform, and the length of the platform slot 13 is greater than the length of the battery pack, so as to allow the saw blade to pass when the sawing motor moves;

[0030] By utilizing the tightening cylinder and the limiting member installed on the fixed platform, the position of the limiting member and the stroke and installation position of the tightening cylinder can be adjusted to adapt to battery packs of various sizes.

[0031] The slide module is installed below the fixed platform. The slide 26 moves in the front-rear direction of the platform. The slide can slide along the front-rear direction of the platform under the drive of the stepper motor 27 to ensure the forward and backward movement of the sawing motor.

[0032] The folding device includes a base 20, a sliding platform 21, a linear motor, a gantry 22, a pressing cylinder 23 and a stretching cylinder 24. The gantry is fixed across the middle position above the base 20 and fastened by connecting plates on the left and right sides; the sliding platform 21 can move forward and backward along the track groove on the upper surface of the base.

[0033] A guide rail groove is arranged on the upper surface of the base to support and guide the forward and backward movement of the sliding platform 21; a linear motor is installed in the base 20 to drive the movement of the sliding platform; a mounting platform is arranged inside the base to install the hydraulic station of the clamping cylinder 23 and the stretching cylinder 24; connecting plates are arranged on the left and right sides of the base to be connected to the gantry.

[0034] A guide rail is arranged on the lower surface of the sliding platform, and the guide rail cooperates with the guide rail groove on the upper surface of the base to ensure that the sliding platform moves along the guide rail groove of the base; the sliding platform is fixed to both ends of the rack 29 of the linear motor, and the linear motor 28 is fixed on the base 20. When the linear motor 28 works, it drives the rack 29 to translate, thereby driving the sliding platform to translate forward and backward along the guide rail of the base;

[0035] A plurality of insulating plates are installed on the upper surface of the sliding platform to support the safety of disassembling the battery pack module.

[0036] The gantry is provided with two groups of oil cylinders, one group is a pressing oil cylinder arranged left and right, and the other group is a stretching oil cylinder arranged front and back. The two groups of oil cylinders are arranged up and down.

[0037] The cylinder barrel of the clamping oil cylinder 23 is connected to the gantry, the piston rod head is fastened to the pressure rod, and the up and down movement of the piston rod of the clamping oil cylinder drives the pressure rod to move up and down, thereby clamping and loosening the battery pack.

[0038] The cylinder barrel of the stretching cylinder 24 is hinged to the gantry through a hinge earring, the piston rod head is connected to a hook, and the hook is connected to the front (rear) side plate of the battery pack shell through a wire rope. When the stretching cylinder is stretched, a pulling force is applied to the side plate obliquely upward, and the angle can be adjusted arbitrarily according to the position of the shell side plate to stretch the side plate obliquely upward.

[0039] The battery pack after the side panels have been cut off by the cutting equipment is placed on the sliding platform, with the battery module facing downward and the battery pack shell facing upward. The remaining two side panels of the battery pack are placed on the sliding platform in the front-to-back direction. The linear motor is started to drive the sliding platform so that the second column of modules in the battery pack is located below the pressure rod. The hydraulic system is turned on to drive the piston rod of the clamping cylinder to extend. After clamping the second column of modules in front, the piston rod of the front stretching cylinder is driven to extend, and the wire rope on the hook of the stretching cylinder rod head is fastened to the front shell of the module, and the piston rod of the stretching cylinder is driven to retract, thereby stretching the battery pack shell upward (diagonally upward). The shell is deformed under the action of the clamping force and the pulling force, and is partially folded upward, so that the first column of modules in front and the second column of modules overcome the bonding force of the potting glue between them and become detached. Then, the clamping cylinder piston rod is retracted, the linear motor starts working, the sliding platform moves forward the distance of one module, the clamping cylinder piston rod is extended, and the third column of modules is clamped. The above actions are repeated to separate the potting glue between the second and third columns of modules. The operation is carried out in sequence to make the columns of modules in the front half of the battery pack independent. At this time, the clamping cylinder piston rod is retracted, the linear motor works, and the sliding platform moves forward to the second row of modules in the rear half of the battery pack, which is located under the pressure rod. The previous operation is repeated to clamp the module, drive the rear stretching cylinder piston rod to extend, hook the wire rope on the rod head and fasten it to the rear shell of the battery pack, drive the stretching cylinder piston rod to retract, and stretch the battery pack shell upward (diagonally upward). The shell is deformed under the action of the clamping force and the tensile force, and is partially folded upward, so that the first row of modules and the second row of modules at the rear overcome the adhesion of the potting glue between them and become detached. According to the method of folding the first half of the modules as mentioned above, the rear half of the battery pack is folded in turn, so that the battery pack shell is deformed from its original flat shape to a polygonal shape after folding, and each side is an independent row of modules.

[0040] At this time, the module and the battery pack shell are only bonded at the bottom by potting glue. Since the connecting surface between the module and the shell is an open surface, the module can be removed from the shell by simple methods such as a blade, and then enter the production line for module cascade utilization and operate normally.

[0041] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A method for disassembling retired glue-filled power batteries, characterized in that: It includes a cutting process and a folding process; the cutting process is used to cut off the left and right side panels of the retired power battery pack after the upper cover has been removed, and the folding process is used to fold the bottom plate of the retired power battery pack with the left and right side panels cut off, so that the glue injection force between each column of battery modules is destroyed and each column of battery modules is separated independently.

2. The method for dismantling retired glue-filled power batteries according to claim 1, characterized in that: After being folded, the battery pack shell is deformed from its original plane shape to a polygonal shape, and each side has a row of independent modules on the outside.

3. The method for disassembling retired glue-filled power batteries according to claim 1, characterized in that: The folding process is implemented by a folding device, which includes a base, a sliding platform, a linear motor, a gantry, a clamping cylinder and a stretching cylinder; a guide groove is arranged on the upper surface of the base to support and guide the forward and backward movement of the sliding platform; a linear motor is installed in the base to drive the movement of the sliding platform; two groups of cylinders are arranged on the gantry, one group is a clamping cylinder, and the other group is a stretching cylinder; the barrel of the clamping cylinder is connected to the gantry, and the head of the piston rod is fastened to the pressure rod, and the up and down movement of the piston rod of the clamping cylinder drives the pressure rod to move up and down, thereby loosening and clamping a module of the battery pack; the barrel of the stretching cylinder is hinged to the gantry through a hinge earring, and the head of the piston rod is connected to a hook, and the hook is connected to the front / rear side plate of the battery pack shell. When the stretching cylinder is stretched, a pulling force is applied to the side plate in an oblique upward direction, so that the bottom plate of the retired power battery pack can be folded, so that the glue filling between each column of battery modules is torn, and each column of battery modules is separated independently.

4. The method for disassembling retired glue-filled power batteries according to claim 3, characterized in that: The folding process specifically includes the following steps: A1, placing the battery pack with the side panels on both sides cut off on the sliding platform, with the battery module facing down and the battery pack shell facing up; A2, starting the linear motor to drive the sliding platform so that the second column of modules in the battery pack is located below the pressure rod; A3, turning on the hydraulic system, driving the piston rod of the clamping cylinder to extend, and after clamping the second column of modules in front, driving the piston rod of the front stretching cylinder to extend, hooking the wire rope on the stretching cylinder rod head and fastening it to the front shell of the module, driving the piston rod of the stretching cylinder to retract, thereby stretching the battery pack shell upward / obliquely upward, and the shell is deformed under the action of the clamping force and the pulling force, and partially folded upward, so that the first column of modules in front and the second column of modules overcome the bonding force of the potting glue between them and detach; A4, then, the clamping cylinder piston rod is retracted, the linear motor works, the sliding platform moves forward a distance of a module, and the clamping cylinder piston rod Stretch out and press the third column of modules, repeat the above actions to disengage the potting glue between the second and third columns of modules, and operate in sequence to make the columns of modules in the front half of the battery pack independent; A5, retract the piston rod of the pressing cylinder, the linear motor works, and the sliding platform moves forward to the second column of modules in the back half of the battery pack, which is located under the pressing rod. Press the module and drive the piston rod of the rear stretching cylinder to extend, fasten the rod head hook to the rear shell of the battery pack, drive the piston rod of the stretching cylinder to retract, and stretch the battery pack shell diagonally upward. The shell is deformed under the action of the pressing force and the tensile force, and is partially folded upward, so that the first column of modules and the second column of modules at the rear overcome the bonding force of the potting glue between them and disengage, and operate according to the method of folding the first half of the modules mentioned above, and fold the back half of the battery pack in sequence, so that the battery pack shell is deformed from the original plane shape to a polygonal shape after folding, and the outside of each side is an independent column of modules.

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