CN217043563U - Lithium battery short circuit roll core detection and removal device - Google Patents

Abstract

The utility model belongs to lithium cell manufacturing field, concretely relates to core detection and removal device is rolled up in lithium cell short circuit. Comprises a conveyor belt, a roll core, a positioning clamp, an electrode lug clamp, a direct current power supply, a picking rod, a collecting skip and a master control box. The positioning clamp, the polar ear clamp and the picking rod are sequentially arranged along the conveying direction. The positive pole and the negative pole of the direct current power supply are respectively connected with the two pole ear clips. The collecting skip and the picking rod are arranged on two sides of the same position of the conveying belt. The main control box is respectively connected with the positioning clamp, the pole lug clamp, the direct current power supply and the picking rod. The head part of the polar lug clamp is provided with a conductive head and an insulating clamp arc. The device is arranged at the tail conveyor belt of the winding machine, the two pole lugs of the winding core are clamped by the pole lug clamps, and the direct-current power supply is disconnected after being electrified. Measuring the capacitance formed by the normal winding core, and discharging after charging; and the winding core for detecting the internal short circuit has stable current, and the master control box controls the picking rod to be picked when detecting the internal short circuit. Through above technical scheme, the problem that there is inside short circuit defective products in the book core of lithium cell winding process output, can get into next process has been solved.

Description

Lithium battery short circuit roll core detection and rejection device

Technical Field

The utility model belongs to lithium cell manufacturing field, concretely relates to lithium cell short circuit rolls up core and detects removing devices.

Background

The fire explosion is the most common accident and the most harmful accident in lithium battery accidents, the thermal runaway of the battery is sourced, more than 70% of the thermal runaway is caused by internal short circuit, and therefore the internal short circuit is the key point of management and control in the production and manufacturing of the lithium battery.

The internal short circuit of the cylindrical lithium battery mainly comes from the bad defects in the production process, such as metal dust foreign matters, cutting burrs, uneven lithium precipitation of the pole piece coating and the like. The lithium battery assembly sequentially comprises the working procedures of winding, entering a shell, spot bottom welding, necking, entering a gasket, rolling a groove, injecting liquid, welding a positive electrode, sealing and the like, and the semi-finished product of the lithium battery in each working procedure has the hidden danger of short circuit. Most enterprises have internal resistance detection in the processes of spot bottom welding, rolling groove and the like, defective products are removed in time, firstly, detection is possible only in a certain process, secondly, even internal short circuit exists in the former process, and the defective products are removed only after being processed to a detection section, so that materials are wasted, and when the reject ratio is higher than the process requirement, the process with the problems is difficult to determine, the shutdown is required to be carried out step by step, and the time is consumed. Therefore, large enterprises often have internal short-circuit detection devices in multiple processes.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a lithium cell short circuit rolls up core and detects removing devices for the first process of lithium cell assembly-winding process is installed in winding all-in-one tail conveyer belt department, has solved the problem that there is inside short circuit defective products in the core that rolls up of lithium cell winding process output, can get into next process. Can prevent missing inspection, save materials and facilitate inspection.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme:

lithium cell short circuit rolls up core and detects removing devices, including conveyer belt and book core, roll up the core and transversely put on the conveyer belt, its characterized in that: the device also comprises a positioning clamp, an electrode lug clamp, a direct-current power supply, a picking rod, a collecting dustpan and a master control box. The positioning clamp, the polar ear clamp and the picking rod are sequentially arranged along the conveying direction of the conveying belt. Two locating clips and two polar ear clips are arranged on two sides of the conveyor belt in a mirror image mode, and the positive pole and the negative pole of the direct-current power supply are respectively connected with the two polar ear clips. The picking rod and the collecting skip are arranged on two sides of the same position of the conveying belt. The main control box is respectively connected with the positioning clamp, the pole lug clamp, the direct current power supply and the picking rod.

Optionally, the positioning clamp includes a positioning clamp cylinder, a positioning rod, a spring and an insulating sleeve. The positioning clamp cylinder is connected with the master control box at one side, and is connected with one end of the positioning rod at the other side, and the other end of the positioning rod is provided with an insulating sleeve. The spring is sleeved on the positioning rod, one end of the spring is fixed with the positioning rod, and the other end of the spring is fixed with the tail part of the insulating sleeve. The insulating sleeve heads of the two positioning clamps are opposite.

Optionally, one tab clamp includes an insulating cylinder, a tab clamp cylinder, a piston, a connecting rod, a lever, an insulating clamp arc and a conductive head. The pole lug clamping cylinder is connected with the master control box, the piston extends into a round bottom surface of the insulating cylinder from the pole lug clamping cylinder, one end of the connecting rod is movably connected with the piston, the other end of the connecting rod is movably connected with one end of the lever, the other end of the lever is movably connected with the tail part of the insulating clamping arc, and the middle part of the lever is movably connected with the insulating cylinder. The other round bottom surface of the insulating cylinder is provided with a conductive head and more than two insulating clamping arcs, the conductive head is positioned at the center of a circle, the insulating clamping arcs can move along the radial direction, and the insulating clamping arcs can wrap the conductive head when moving towards the center of the circle. The other electrode lug clamp structure is in mirror symmetry with the electrode lug clamp, the head parts of the two conductive heads are opposite, and the tail parts of the two conductive heads are respectively connected with the positive electrode and the negative electrode of the direct-current power supply.

Optionally, the rod picking comprises a rod picking cylinder, a rod picking frame and an insulating rod head. The rod picking frame is arranged on one side of the conveying belt and is provided with a rod picking cylinder and an insulating rod head. The rod picking cylinder is connected with the master control box. The tail part of the insulating rod head is connected with a rod picking cylinder, and the head part of the insulating rod head faces the collecting dustpan.

Optionally, a number indicator is arranged between the negative electrode of the direct current power supply and the tab clamp.

Furthermore, the power-on time of the direct current power supply is not less than 0.4 second and not more than 0.8 second each time, the voltage is not less than 400V and not more than 600V, and when the indicating meter displays that the resistance is less than 200M omega, the master control box controls the core picking rod to pick the core to the collecting skip.

(III) advantageous effects

Compared with the prior art, the utility model discloses possess following beneficial effect:

when the conveying belt conveys the winding core to the lug clamps, the lug clamps clamp two lugs, and the direct-current power supply is disconnected after being electrified. For a normal roll core without internal short circuit, because an insulating diaphragm is arranged between a positive pole piece and a negative pole piece, a capacitor is formed between the positive pole piece and the negative pole piece, the capacitor cannot be charged after being fully charged, and then the capacitor can be discharged, and the mobile charge in a circuit is increased and then reduced. Secondly, for a bad winding core with internal short circuit, internal micro short circuit exists when the power is on, so that the whole circuit is a passage, or the local part of the micro short circuit is overheated, the diaphragm is scalded through, the positive electrode and the negative electrode are in contact, the whole circuit is a passage, stable current exists in the circuit, and the inside of the winding core has a definite resistance value. When the master control box detects the latter situation, the picking rod can be controlled to pick the defective winding cores into the collecting skip. After completion, the conveyor belt continues until the next core is in place.

Optionally, the transverse position of the winding core is positioned through the positioning clamp before the internal resistance is measured, the phenomenon that the winding core which is just wound is placed on the conveying belt to shift is avoided, the pole lug clamp is not in place, and the detection and rejection effects are not good.

Optionally, the tab clamp is sequentially conducted through a tab clamp cylinder, a piston, a connecting rod, a lever and an insulation clamp arc, and the tab is clamped on the conductive head, so that the direct-current power supply can be communicated with the tab for detection. And after detection is finished, the insulating clamp arc is opened, and the winding core passes through the insulating clamp arc. The open-close design of the insulation clamping arc can ensure that the tab clamp can clamp the tab no matter how the winding cores are placed on the conveyor belt and how the height and the position of the tab are. In addition, the clamping arc is an insulator, so that the detection cannot be influenced.

Optionally, when the defective roll core is transferred to the picking rod, the picking rod cylinder pushes the insulating rod head to pick the defective roll core into the collecting skip.

Optionally, the indicator can display the current and other numerical values in the circuit, and if the winding core is normal, the current is increased and then reduced; if there is an internal short circuit, the current has a stable period and can display the resistance value.

Further, when measuring that the internal resistance of the roll core is less than 200M omega, the short circuit problem is determined, defective products are removed, and the material waste caused by the fact that the defective products enter the subsequent working procedure for processing can be avoided.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present invention;

fig. 2 is a schematic view of a positioning clip according to embodiment 2 of the present invention;

fig. 3 is a schematic view of a tab clamp structure in embodiment 3 of the present invention;

fig. 4 is a schematic view of the structure of the tab clamping head part in embodiment 3 of the present invention;

fig. 5 is a schematic view of the internal structure of a tab clamp in embodiment 3 of the present invention;

fig. 6 is a schematic structural view of a picking rod and a collecting dustpan in embodiment 4 of the present invention;

fig. 7 is a schematic structural view of embodiment 5 of the present invention;

in the figure: 1. a conveyor belt; 2. a winding core; 3. positioning clips; 31. a positioning clamp cylinder; 32. positioning a rod; 33. A spring; 34. an insulating sleeve; 4. an ear clip; 41. an insulating cylinder; 42. an ear clamp cylinder; 43. a piston; 44. a connecting rod; 45. a lever; 46. insulating and clamping arc; 47. a conductive head; 5. a direct current power supply; 51. a number indicating table; 6. picking the rod; 61. a rod picking cylinder; 62. a rod picking frame; 63. an insulating rod head; 7. a collecting dustpan; 8. and (4) a master control box.

Detailed Description

In the description of this patent, unless otherwise expressly stated or limited, the terms "mounted," "connected," "disposed," and the like are to be construed broadly and their meaning in the context of this patent will be understood to those skilled in the art as appropriate. The terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like refer to an orientation or positional relationship that is based on the orientation or positional relationship shown in the drawings for ease of description and simplicity of description, but does not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated.

Example 1

Referring to fig. 1, the present invention provides the following technical solutions:

lithium cell short circuit rolls up core and detects removing devices, including conveyer belt 1 and roll up core 2, roll up core 2 and transversely put on conveyer belt 1. The device also comprises a positioning clamp 3, a tab clamp 4, a direct-current power supply 5, a picking rod 6, a collecting dustpan 7 and a master control box 8. The positioning clamp 3, the tab clamp 4 and the picking rod 6 are sequentially arranged along the conveying direction of the conveyor belt 1. Two positioning clips 3 and two pole ear clips 4 are arranged on both sides of the conveyor belt 1 in mirror image. The positive pole and the negative pole of the direct current power supply 5 are respectively connected with the two pole ear clamps 4. The picking rod 6 and the collecting skip 7 are arranged on two sides of the same position of the conveyor belt 1. The master control box 8 is respectively connected with the positioning clamp 3, the pole lug clamp 4, the direct current power supply 5 and the picking rod 6.

Has the beneficial effects that: when the conveyor belt 1 conveys the winding core 2 to the lug clamps 4, the lug clamps 4 clamp two lugs, and the direct-current power supply 5 is disconnected after being electrified. For a normal roll core 2 without internal short circuit, because an insulating diaphragm is arranged between a positive pole piece and a negative pole piece, a capacitor is formed between the positive pole piece and the negative pole piece, the capacitor cannot be charged after being fully charged, and then the capacitor can be discharged, and the mobile charge in a circuit is increased and then reduced. Secondly, for the defective winding core 2 with the internal short circuit, the internal micro short circuit exists when the power is on, so that the whole circuit is a passage, or the local overheating of the micro short circuit part can scald the diaphragm through, the positive electrode and the negative electrode are contacted, the whole circuit becomes a passage, so that the circuit has stable current, and the internal of the winding core 2 has a definite resistance value. When the master control box 8 detects the latter situation, the rejecting bar 6 can be controlled to reject the defective winding cores 2 into the collecting skip 7. After completion, the conveyor belt 1 continues until the next core 2 is in place.

Example 2

Referring to fig. 1 to 2, the present invention provides the following technical solutions:

as in embodiment 1, the positioning clip 3 optionally includes a positioning clip cylinder 31, a positioning rod 32, a spring 33, and an insulating sleeve 34. One side of the positioning clamp cylinder 31 is connected with the master control box 8, the other side is connected with one end of the positioning rod 32, and the other end of the positioning rod 32 is provided with an insulating sleeve 34. The spring 33 is sleeved on the positioning rod 32, one end of the spring 33 is fixed with the positioning rod 32, and the other end of the spring 33 is fixed with the tail part of the insulating sleeve 34. The insulating sleeves 34 of the two positioning clips 3 are opposite in head.

Has the advantages that: the transverse position of the winding core 2 is positioned by the positioning clamp 3 before internal resistance measurement, so that the winding core 2 which is just wound is prevented from being placed on the conveyor belt 1 to shift, the clamping of the pole lug clamp 4 is not in place, and the detection and rejection effects are not good.

Example 3

Referring to fig. 1 to 5, the present invention provides the following technical solutions:

as in embodiment 1, optionally, one of the pole ear clamps 4 includes an insulating cylinder 41, a pole ear clamp cylinder 42, a piston 43, a connecting rod 44, a lever 45, an insulating clamp arc 46, and a conductive head 47. The pole lug clamp cylinder 42 is connected with the master control box 8, and the piston 43 extends into a circular bottom surface of the insulating cylinder 41 from the pole lug clamp cylinder 42. One end of the connecting rod 44 is movably connected with the piston 43, the other end is movably connected with one end of the lever 45, the other end of the lever 45 is movably connected with the tail part of the insulating clamping arc 46, and the middle part of the lever 45 is movably connected with the insulating cylinder 41. The other circular bottom surface of the insulating cylinder 41 is provided with a conductive head 47 and more than two insulating clamping arcs 46, the conductive head 47 is positioned at the center of the circle, the insulating clamping arcs 46 can move along the radial direction, and the insulating clamping arcs 46 can move towards the center of the circle to wrap the conductive head 47. The other polar ear clip 4 is constructed as a mirror image of the polar ear clip 4 described above. The heads of the two conductive heads 47 are opposite, and the tails of the two conductive heads are respectively connected with the anode and the cathode of the direct current power supply 5.

Has the advantages that: the pole lug clamp 4 is conducted in sequence through the pole lug clamp cylinder 42, the piston 43, the connecting rod 44, the lever 45 and the insulating clamp arc 46, and clamps a pole lug on the conductive head 47, so that the direct-current power supply 5 can be communicated with the pole lug for detection. After the detection is completed, the insulation clamp 46 is opened to allow the roll core 2 to pass through. The open-close design of the insulation clamp arc 46 can ensure that the tab clamp 4 can clamp the tab no matter how the winding core 2 is placed on the conveyor belt 1 and the height and the position of the tab. In addition, the clamping arc is an insulator, so that the detection cannot be influenced.

Example 4

Referring to fig. 1 to 6, the present invention provides the following technical solutions:

as in example 1, the pin picking 6 optionally includes a pin picking cylinder 61, a pin picking holder 62, and an insulating pin head 63. The rod picking frame 62 is arranged on one side of the conveyor belt 1, and is provided with a rod picking cylinder 61 and an insulating rod head 63, and the rod picking cylinder 61 is connected with the master control box 8. The tail part of the insulating rod head 63 is connected with the rod picking cylinder 61, and the head part faces the collecting dustpan 7.

Has the beneficial effects that: when the defective winding core 2 is transferred to the picking rod 6, the picking rod cylinder 61 pushes the insulation rod head 63 to pick the defective winding core 2 into the collecting skip 7.

Example 5

Referring to fig. 1 to 7, the present invention provides the following technical solutions:

as in embodiment 1, optionally, an indicator 51 is disposed between the negative electrode of the dc power supply 5 and the tab clamp 4.

Has the beneficial effects that: the indicator 51 can display the current and other numerical values in the circuit, and if the winding core 2 is normal, the current is increased and then reduced; if there is an internal short circuit, the current has a stable period and can display the resistance value.

Example 6

Referring to fig. 1 to 7, the present invention provides the following technical solutions:

as in embodiment 5, further, each time the dc power supply 5 is powered on for not less than 0.4 second and not more than 0.8 second, the voltage is not less than 400V and not more than 600V, and the indicator 51 shows that when the resistance is less than 200M Ω, the master control box 8 controls the picking rod 6 to pick the winding core 2 to the collecting skip 7.

Has the advantages that: when the internal resistance of the winding core 2 is less than 200M omega, the problem of short circuit is determined, defective products are removed, and the material waste caused by the fact that the defective products enter the subsequent process for processing can be avoided.

The lithium battery short circuit roll core detection and removal device provided by the above 6 embodiments is used for a first procedure, namely a winding procedure, of lithium battery assembly, is installed on a tail conveyor belt of a winding all-in-one machine, and solves the problem that an internal short circuit defective product exists in a roll core produced by the lithium battery winding procedure and can enter the next procedure. Can prevent missing inspection, save materials and facilitate inspection.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. Lithium cell short circuit rolls up core and detects removing device, including conveyer belt (1) and roll up core (2), roll up core (2) and transversely put on conveyer belt (1), its characterized in that: still include locating clip (3), utmost point ear clamp (4), DC power supply (5), pick pole (6), collect dustpan (7) and master control case (8), locating clip (3), utmost point ear clamp (4) and pick pole (6) set up along conveyer belt (1) direction of transfer in proper order, and two locating clips (3) and two utmost point ear clamps (4) all are the mirror image and set up in conveyer belt (1) both sides, DC power supply (5) positive negative pole is connected two utmost point ear clamps (4) respectively, pick pole (6) and collect dustpan (7) and set up the both sides in conveyer belt (1) same position, locating clip (3), utmost point ear clamp (4), DC power supply (5) and pick pole (6) are connected respectively in master control case (8).

2. The lithium battery short circuit coiled core detection and rejection device of claim 1, characterized in that: the positioning clamp (3) comprises a positioning clamp cylinder (31), a positioning rod (32), a spring (33) and an insulating sleeve (34), one side of the positioning clamp cylinder (31) is connected with the master control box (8), the other side of the positioning clamp cylinder is connected with one end of the positioning rod (32), the other end of the positioning rod (32) is provided with the insulating sleeve (34), the spring (33) is sleeved on the positioning rod (32), one end of the spring (33) is fixed with the positioning rod (32), the other end of the spring is fixed with the tail of the insulating sleeve (34), and the heads of the insulating sleeves (34) of the two positioning clamps (3) are opposite.

3. The lithium battery short circuit roll core detection and removal device of claim 1, characterized in that: the electrode lug clamp (4) comprises an insulating cylinder (41), an electrode lug clamp air cylinder (42), a piston (43), a connecting rod (44), a lever (45), an insulating clamp arc (46) and a conductive head (47), the electrode lug clamp air cylinder (42) is connected with a master control box (8), the piston (43) extends into a circular bottom surface of the insulating cylinder (41) from the electrode lug clamp air cylinder (42), one end of the connecting rod (44) is movably connected with the piston (43), the other end of the connecting rod is movably connected with one end of the lever (45), the other end of the lever (45) is movably connected with the tail part of the insulating clamp arc (46), the middle part of the lever (45) is movably connected with the insulating cylinder (41), the other circular bottom surface of the insulating cylinder (41) is provided with the conductive head (47) and more than two insulating clamp arcs (46), the conductive head (47) is positioned at the circle center, the insulating clamp arc (46) can move along the radial direction, and the conductive head (47) can be wrapped by the insulating clamp arc (46) moving towards the circle center, the other polar ear clip (4) is in mirror symmetry with the polar ear clip (4), the heads of the two conductive heads (47) are opposite, and the tails of the two conductive heads are respectively connected with the positive electrode and the negative electrode of the direct-current power supply (5).

4. The lithium battery short circuit roll core detection and removal device of claim 1, characterized in that: the rod picking device is characterized in that the rod picking (6) comprises a rod picking cylinder (61), a rod picking frame (62) and an insulating rod head (63), the rod picking frame (62) is arranged on one side of the conveyor belt (1) and is provided with the rod picking cylinder (61) and the insulating rod head (63), the rod picking cylinder (61) is connected with the main control box (8), the tail part of the insulating rod head (63) is connected with the rod picking cylinder (61), and the head part of the insulating rod head faces the collecting dustpan (7).

5. The lithium battery short circuit coiled core detection and rejection device of claim 1, characterized in that: a numerical indicator (51) is arranged between the negative electrode of the direct current power supply (5) and the pole lug clamp (4), and the numerical indicator (51) is connected with the master control box (8).

6. The lithium battery short circuit roll core detection and removal device as claimed in claim 5, characterized in that: the direct current power supply (5) is electrified for no less than 0.4 second and no more than 0.8 second each time, and the voltage is no less than 400V and no more than 600V, when the indicator (51) shows that the resistance is less than 200M omega, the total control box (8) controls the picking rod (6) to pick the winding core (2) to the collecting skip (7).

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