CN219759696U - Online battery winding core short circuit detection mechanism - Google Patents

Abstract

The utility model provides an online battery winding core short circuit detection mechanism, which comprises a short circuit detector and winding equipment, wherein the winding equipment comprises a support frame and a discharging shaft for mounting a pole piece material roll, an electric connecting piece is arranged on the discharging shaft, and the short circuit detector is electrically connected with the electric connecting piece through a wiring assembly; the blowing axle is including being used for installing the anodal blowing axle that the anodal piece material was rolled up, and the blowing axle is still including being used for installing the negative pole piece material and rolled up the negative pole blowing axle, and wiring assembly includes first wiring assembly and second wiring assembly, and first wiring assembly and anodal piece material are rolled up and all are connected with anodal blowing epaxial electric connection piece electricity, and second wiring assembly and negative pole piece material are rolled up and all are connected with the epaxial electric connection piece electricity of negative pole blowing to realize the electric connection between short-circuit detector and anodal piece material and the negative pole piece material are rolled up. The online battery winding core short circuit detection mechanism can detect whether the winding core is short-circuited in real time in the winding process of the winding core, so that the production efficiency is improved, and the waste of materials is reduced.

Description

Online battery winding core short circuit detection mechanism

Technical Field

The utility model relates to the technical field of battery production equipment, in particular to an online battery winding core short circuit detection mechanism.

Background

The winding type battery cell (i.e., winding core) is a battery cell formed by winding a positive electrode sheet, a negative electrode sheet and a diaphragm, and the winding core short circuit is a problem frequently occurring in the battery winding production process (for example, dust, burrs and the like on the positive/negative electrode sheet pierce the diaphragm to cause short circuit). The traditional short circuit detection method is to test the winding core after the winding of the winding core is completed, and detect whether the winding core has short circuit or not by applying high voltage between the positive electrode and the negative electrode of the winding core. The detection mode has the defects that detection is carried out after winding of the winding core is completed, abnormal points which cause short circuits are difficult to timely find out, and once the winding core is detected to be short-circuited, the whole winding core is required to be scrapped, so that the working efficiency is affected, and the waste of materials is caused.

Disclosure of Invention

The utility model aims to provide an online battery winding core short circuit detection mechanism which can detect whether a winding core is short-circuited in real time in the winding process of the winding core so as to improve the production efficiency and reduce the waste of materials.

The utility model provides an online battery winding core short circuit detection mechanism, which comprises a short circuit detector and winding equipment, wherein the winding equipment comprises a support frame and a discharging shaft for mounting pole piece material rolls, and the discharging shaft is rotationally connected with the support frame; an electric connecting piece is arranged on the discharging shaft and is used for being electrically connected with the pole piece material roll on the discharging shaft; the short circuit detector is electrically connected with the electric connecting piece through a wiring assembly, and the wiring assembly is rotationally connected with the discharging shaft;

the pole piece material is rolled up and is rolled up including positive pole piece material and negative pole piece material, the blowing axle is including being used for installing the positive pole blowing axle of positive pole piece material roll, the blowing axle is still including being used for installing the negative pole blowing axle of negative pole piece material roll, wiring assembly includes first wiring assembly and second wiring assembly, the epaxial electric connection piece of positive pole blowing with first wiring assembly electricity is connected, epaxial electric connection piece of negative pole blowing with second wiring assembly electricity is connected, in order to realize short circuit detector with positive pole piece material roll with electric connection between the negative pole piece material roll.

In one implementation, the electrical connector includes an electrical connection piece, the electrical connection piece is fixed on the discharging shaft, one end of the electrical connection piece is electrically connected with the pole piece coil on the discharging shaft, and the other end of the electrical connection piece is electrically connected with the wiring assembly.

In one implementation, the electrical connector further comprises conductive foam, one end of the electrical connector for connecting the pole piece material roll is provided with the conductive foam, and the electrical connector contacts with the pole piece material roll through the conductive foam.

In one implementation, each wiring assembly comprises a connecting wire and a rotating piece, the rotating piece comprises a fixed part and a rotating part, the rotating part is fixed on the discharging shaft and rotates along with the discharging shaft, and the rotating part is electrically connected with the electric connecting piece; the fixed part is rotationally connected with the rotating part, and the fixed part is electrically connected with the rotating part; one end of the connecting wire is electrically connected with the fixing part, and the other end of the connecting wire is electrically connected with the short circuit detector.

In one embodiment, the rotating element is a conductive rolling bearing, the fixed part is an outer ring of the rolling bearing, and the rotating part is an inner ring of the rolling bearing.

In one implementation manner, the supporting frame is provided with a clamping piece, the clamping piece is connected with the fixing part, and the fixing part is fixed with the supporting frame through the clamping piece.

In one implementation manner, one end of the connecting wire, which is used for connecting the fixing part, is provided with a ring connecting part, the ring connecting part is arranged on the outer wall of the fixing part in a ring mode, and the ring connecting part and the fixing part are fixed through welding.

In one implementation, an annular groove is formed in the outer wall of the fixing portion, and the connecting wire is fixedly connected in the annular groove.

In one implementation, the discharge shaft is an inflatable shaft.

According to the on-line battery winding core short circuit detection mechanism, the short circuit detector is arranged and is electrically connected with the electric connecting piece on the positive electrode discharging shaft through the first wiring assembly, and the electric connecting piece on the positive electrode discharging shaft is electrically connected with the positive electrode sheet material roll, so that the electric connection between the short circuit detector and the positive electrode sheet material roll is realized; meanwhile, the short circuit detector is electrically connected with the electric connecting piece on the negative electrode discharging shaft through the second wiring assembly, and the electric connecting piece on the negative electrode discharging shaft is electrically connected with the negative electrode sheet coil, so that electric connection between the short circuit detector and the negative electrode sheet coil is realized. In the working process, the short circuit detector releases high-voltage electricity once at regular intervals, and if short circuit occurs in the winding process, the current released by the short circuit detector forms a loop, so that the short circuit of the winding core formed by winding the separator, the positive plate released by the positive plate material winding and the negative plate released by the negative plate material winding is judged. The online battery winding core short circuit detection mechanism can detect whether the winding core is short-circuited in real time in the winding process of the winding core, eliminates hidden danger in time, cuts the winding core with the short circuit potential safety hazard in time and then rewinds the winding core, thereby improving the production efficiency and reducing the waste of materials.

Meanwhile, as the wiring assembly is rotationally connected with the discharging shaft, the wiring assembly can not rotate along with the discharging shaft when the discharging shaft rotates to avoid potential safety hazards caused by winding of the wiring assembly, so that the detection process is safe and stable.

Drawings

Fig. 1 is a schematic structural diagram of an online battery core short circuit detection mechanism in an embodiment of the utility model.

Fig. 2 is a schematic diagram of an assembly structure of a pole piece roll, an electrical connector, a wiring assembly and a discharging shaft in an embodiment of the present utility model.

Fig. 3 is an enlarged partial schematic view at position a in fig. 2.

In the figure: 1-short circuit detector, 2-winding equipment, 21-support frame, 211-fastener, 22-blowing axle, 22A-positive pole blowing axle, 22B-negative pole blowing axle, 3-electric connecting piece, 31-electric connection piece, 32-electric conduction foam, 4-wiring subassembly, 40A-first wiring subassembly, 40B-second wiring subassembly, 41-connecting wire, 411-ring portion, 42-rotating piece, 421-fixed part, 4210-ring channel, 422-rotating part, 5-pole piece material roll, 51-positive pole piece material roll, 52-negative pole piece material roll, 6-core.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

The terms "first," "second," "third," "fourth" and the like in the description and in the claims, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.

The terms upper, lower, left, right, front, rear, top, bottom and the like (if any) in the description and in the claims are used for descriptive purposes and not necessarily for describing relative positions of structures in the figures and in describing relative positions of structures. It should be understood that the use of directional terms should not be construed to limit the scope of the utility model as claimed.

As shown in fig. 1 and 2, the on-line battery winding core short circuit detection mechanism provided by the embodiment of the utility model comprises a short circuit detector 1 and winding equipment 2, wherein the winding equipment 2 comprises a support frame 21 and a discharging shaft 22 for mounting a pole piece material roll 5 (in general, the pole piece material roll 5 is wound on an insulating sleeve and sleeved on the discharging shaft 22 through the insulating sleeve), and the discharging shaft 22 is rotatably connected with the support frame 21. The discharging shaft 22 is provided with an electric connecting piece 3, and the electric connecting piece 3 is used for being electrically connected with the pole piece material roll 5 on the discharging shaft 22. The short circuit detector 1 is electrically connected with the electrical connector 3 through the wiring assembly 4, so that the electrical connection between the short circuit detector 1 and the pole piece material roll 5 on the discharging shaft 22 is realized. The wiring assembly 4 is rotatably connected with the discharging shaft 22.

The pole piece roll 5 includes a positive pole piece roll 51 and a negative pole piece roll 52. The discharging shaft 22 comprises a positive discharging shaft 22A for installing the positive plate coil 51, the discharging shaft 22 also comprises a negative discharging shaft 22B for installing the negative plate coil 52, the positive discharging shaft 22A and the negative discharging shaft 22B are respectively connected with the supporting frame 21 in a rotating mode, and the positive discharging shaft 22A and the negative discharging shaft 22B are respectively provided with the electric connecting piece 3. The wiring assembly 4 includes a first wiring assembly 40A and a second wiring assembly 40B, the first wiring assembly 40A is rotatably connected with the positive discharging shaft 22A, and the second wiring assembly 40B is rotatably connected with the negative discharging shaft 22B.

The electrical connector 3 on the positive discharge shaft 22A is electrically connected with the first wiring assembly 40A, and the electrical connector 3 on the negative discharge shaft 22B is electrically connected with the second wiring assembly 40B, so as to realize electrical connection between the short circuit detector 1 and the positive sheet roll 51 and the negative sheet roll 52.

As an embodiment, the short circuit detector 1 may include an alarm (not shown) for sending out corresponding alarm information when obtaining the detection result of the short circuit, and specifically, the alarm may be an audible and visual alarm in the prior art.

Specifically, in operation, the winding device 2 winds the separator (not numbered), the positive electrode sheet released from the positive electrode sheet roll 51, and the negative electrode sheet released from the negative electrode sheet roll 52 to form the winding core 6, and at this time, the positive electrode discharging shaft 22A and the negative electrode discharging shaft 22B rotate relative to the supporting frame 21 to drive the positive electrode sheet roll 51 and the negative electrode sheet roll 52 to rotate and discharge, respectively. The short circuit detector 1 can select the existing daily tester with the model ST5520, and the short circuit detector 1 releases 125-250V high voltage once every certain time (the voltage parameter is adjusted according to the thickness of the diaphragm); when the winding core 6 is short-circuited in the winding process, current can pass through the first wiring component 40A, the electric connector 3 on the positive electrode discharging shaft 22A, the positive electrode sheet material roll 51, the positive electrode sheet between the positive electrode sheet material roll 51 and the winding core 6, the winding core 6 (namely, the short-circuit point of the positive electrode sheet in the winding core 6), the negative electrode sheet between the negative electrode sheet material roll 52 and the winding core 6, the negative electrode sheet material roll 52, the electric connector 3 on the negative electrode discharging shaft 22B and the second wiring component 40B to form a loop with the short-circuit detector 1, and at the moment, the short-circuit detector 1 can obtain the detection result of the short-circuit and then send corresponding alarm information through the alarm.

According to the on-line battery winding core short circuit detection mechanism provided by the embodiment, the short circuit detector 1 is arranged, the short circuit detector 1 is electrically connected with the electric connecting piece 3 on the positive electrode discharging shaft 22A through the first wiring component 40A, and the positive electrode sheet material roll 51 is electrically connected with the electric connecting piece 3 on the positive electrode discharging shaft 22A, so that the electric connection between the short circuit detector 1 and the positive electrode sheet material roll 51 is realized; meanwhile, the short circuit detector 1 is electrically connected with the electric connector 3 on the negative electrode discharging shaft 22B through the second wiring assembly 40B, and the negative electrode sheet material roll 52 is electrically connected with the electric connector 3 on the negative electrode discharging shaft 22B, so that the electric connection between the short circuit detector 1 and the negative electrode sheet material roll 52 is realized. In the working process, the short circuit detector 1 releases high-voltage electricity once every certain time, and if short circuit occurs in the winding process, the current released by the short circuit detector 1 forms a loop, so that the winding core 6 is judged to have short circuit. The online battery winding core short circuit detection mechanism can detect whether the winding core 6 is short-circuited in real time in the winding process of the winding core 6, eliminates hidden danger in time, cuts the winding core 6 with the hidden danger of short circuit in time and then rewinds the winding core, thereby improving the production efficiency and reducing the waste of materials.

Meanwhile, since the wiring assembly 4 is rotationally connected with the discharging shaft 22 (the first wiring assembly 40A is rotationally connected with the positive discharging shaft 22A, and the second wiring assembly 40B is rotationally connected with the negative discharging shaft 22B), when the discharging shaft 22 is rotationally discharging, the wiring assembly 4 can not rotate along with the discharging shaft 22, so that potential safety hazards caused by winding of the wiring assembly 4 are avoided, and the detection process is safe and stable.

As shown in fig. 2, as an embodiment, the electrical connector 3 includes an electrical connection piece 31, where the electrical connection piece 31 is fixed on the discharging shaft 22, one end of the electrical connection piece 31 is electrically connected with the pole piece coil 5 on the discharging shaft 22, and the other end of the electrical connection piece 31 is electrically connected with the wiring assembly 4.

As an embodiment, the electric connection piece 31 is a copper piece, which is fixed to the discharge shaft 22 by welding. Of course, in other embodiments, the electrical connection piece 31 may be made of other materials.

As shown in fig. 2, as an embodiment, the electrical connector 3 further includes a conductive foam 32, one end of the electrical connection piece 31, which is used for connecting the pole piece material roll 5, is provided with the conductive foam 32, and the electrical connection piece 31 contacts with the pole piece material roll 5 through the conductive foam 32, so as to realize electrical connection between the electrical connection piece 31 and the pole piece material roll 5.

Specifically, the conductive foam 32 is in contact with the pole piece material roll 5, so that scratch and abrasion to the pole piece material roll 5 can be reduced or avoided. The electrical connection piece 31 has a harder texture, and if it is in direct contact with the pole piece roll 5, the pole piece roll 5 may be scratched; the conductive foam 32 is softer in texture, and the contact of the conductive foam with the pole piece material roll 5 can reduce or avoid scratch and abrasion to the pole piece material roll 5.

As shown in fig. 2, as an embodiment, each wiring assembly 4 (specifically, the first wiring assembly 40A or the second wiring assembly 40B) includes a connection wire 41 and a rotating member 42, the rotating member 42 includes a fixing portion 421 and a rotating portion 422, the rotating portion 422 is fixed on the discharge shaft 22 and rotates with the discharge shaft 22, and the rotating portion 422 is electrically connected with the electrical connection member 3 (specifically, the rotating portion 422 is electrically connected with the electrical connection piece 31). The fixed portion 421 is rotatably connected to the rotating portion 422, and the fixed portion 421 is electrically connected to the rotating portion 422. One end of the connecting wire 41 is electrically connected with the fixing portion 421, and the other end of the connecting wire 41 is electrically connected with the short circuit detector 1, that is, the short circuit detector 1 is electrically connected with the pole piece material roll 5 through the connecting wire 41, the fixing portion 421, the rotating portion 422 and the electrical connector 3 in sequence.

As shown in fig. 2, as an embodiment, the rotating member 42 and the pole piece coil 5 are disposed on the discharging shaft 22 at intervals along the axial direction of the discharging shaft 22, the electric connection piece 31 is disposed to extend along the axial direction of the discharging shaft 22, opposite ends of the electric connection piece 31 are respectively electrically connected with the rotating portion 422 of the rotating member 42 and the pole piece coil 5, specifically, the rotating portion 422 is sleeved on the discharging shaft 22, one end, far away from the pole piece coil 5, of the electric connection piece 31 is located between the inner wall of the rotating portion 422 and the outer wall of the discharging shaft 22, and the rotating portion 422 is in contact connection with the electric connection piece 31.

As shown in fig. 2, in one embodiment, the rotor 42 is a rolling bearing (e.g., a deep groove ball bearing, a needle bearing, etc.) that is electrically conductive, the fixed portion 421 is an outer ring of the rolling bearing, and the rotor 422 is an inner ring of the rolling bearing. The inner ring is sleeved and fixed on the discharging shaft 22 and is electrically connected with the electric connecting sheet 31; the outer ring is sleeved outside the inner ring, and rolling bodies (not shown in the figure, the rolling bodies can be balls, rolling pins and the like) are clamped between the inner ring and the outer ring so as to realize rotary connection and electric connection between the inner ring and the outer ring; the connection wire 41 is electrically connected to the outer ring. Of course, in other embodiments, the rotating member 42 may be other devices.

As shown in fig. 1 and 2, as an embodiment, the supporting frame 21 is provided with a clamping member 211, the clamping member 211 is connected with the fixing portion 421, and the fixing portion 421 is fixed with the supporting frame 21 by the clamping member 211, so that the fixing portion 421 is prevented from rotating along with the rotating portion 422, and further potential safety hazards caused by winding of the connecting wire 41 when the discharging shaft 22 rotates and discharges materials are avoided. The fastening member 211 and the fixing portion 421 can be fastened and fixed.

As shown in fig. 2 and 3, as an embodiment, one end of the connecting wire 41 for connecting the fixing portion 421 is provided with a ring connecting portion 411, the ring connecting portion 411 is looped on the outer wall of the fixing portion 421, the ring connecting portion 411 and the fixing portion 421 are fixed by welding, and the connecting wire 41 is electrically connected to the fixing portion 421 through the ring connecting portion 411. The connection ring 411 may be formed by winding the end of the connection wire 41 around the outer wall of the fixing portion 421, or may be a separate annular conductive member (for example, a hoop) that is sleeved on the fixing portion 421. The connection ring portion 411 is connected with the fixing portion 421, so that the contact area and the welding area between the connecting wire 41 and the fixing portion 421 can be increased, and the stability of electrical connection can be improved.

As shown in fig. 2 and 3, as an embodiment, an annular groove 4210 is provided on the outer wall of the fixing portion 421, and the connection line 41 is fixedly connected to the annular groove 4210. Specifically, the connection wire 41 is fixed in the annular groove 4210 by the connection ring portion 411, so that the connection between the connection wire 41 and the fixing portion 421 is more stable and firm.

As shown in fig. 2, as an embodiment, the discharging shaft 22 is an inflatable shaft (also referred to as an inflatable shaft) for contracting so that the sleeve or rotating part 422 is sleeved on the discharging shaft 22 and moved into place, or expanding so as to press the inner wall of the sleeve or rotating part 422, thereby conveniently realizing the installation of the pole piece coil 5 and the rotating member 42.

The online battery winding core short circuit detection mechanism in the embodiment can detect whether the winding core 6 is short-circuited in real time in the winding process of the winding core 6, eliminates hidden danger in time, cuts the winding core 6 with the hidden danger of short circuit in time and then rewinds the winding core, thereby improving the production efficiency and reducing the waste of materials. Meanwhile, since the wiring assembly 4 is rotationally connected with the discharging shaft 22 (the first wiring assembly 40A is rotationally connected with the positive discharging shaft 22A, and the second wiring assembly 40B is rotationally connected with the negative discharging shaft 22B), when the discharging shaft 22 is rotationally discharging, the wiring assembly 4 can not rotate along with the discharging shaft 22, so that potential safety hazards caused by winding of the wiring assembly 4 are avoided, and the detection process is safe and stable.

The foregoing is merely illustrative embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present utility model, and the utility model should be covered. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (9)

1. The on-line battery winding core short circuit detection mechanism is characterized by comprising a short circuit detector (1) and winding equipment (2), wherein the winding equipment (2) comprises a support frame (21) and a discharging shaft (22) for mounting a pole piece material roll (5), and the discharging shaft (22) is rotationally connected with the support frame (21); an electric connecting piece (3) is arranged on the discharging shaft (22), and the electric connecting piece (3) is used for being electrically connected with a pole piece material roll (5) on the discharging shaft (22); the short circuit detector (1) is electrically connected with the electric connecting piece (3) through a wiring component (4), and the wiring component (4) is rotationally connected with the discharging shaft (22);

the pole piece material rolls (5) comprise a positive pole piece material roll (51) and a negative pole piece material roll (52), the discharging shaft (22) comprises a positive pole discharging shaft (22A) for installing the positive pole piece material roll (51), the discharging shaft (22) further comprises a negative pole discharging shaft (22B) for installing the negative pole piece material roll (52), the wiring assembly (4) comprises a first wiring assembly (40A) and a second wiring assembly (40B), an electric connecting piece (3) on the positive pole discharging shaft (22A) is electrically connected with the first wiring assembly (40A), and an electric connecting piece (3) on the negative pole discharging shaft (22B) is electrically connected with the second wiring assembly (40B) so as to realize electric connection between the short circuit detector (1) and the positive pole piece material roll (51) and the negative pole piece material roll (52).

2. The on-line battery winding core short circuit detection mechanism according to claim 1, wherein the electric connection piece (3) comprises an electric connection piece (31), the electric connection piece (31) is fixed on the discharging shaft (22), one end of the electric connection piece (31) is electrically connected with the pole piece winding (5) on the discharging shaft (22), and the other end of the electric connection piece (31) is electrically connected with the wiring assembly (4).

3. The on-line battery winding core short circuit detection mechanism according to claim 2, wherein the electrical connector (3) further comprises conductive foam (32), one end of the electrical connector (31) for connecting the pole piece material roll (5) is provided with the conductive foam (32), and the electrical connector (31) is in contact with the pole piece material roll (5) through the conductive foam (32).

4. The on-line battery core short detection mechanism according to claim 1, wherein each of the wiring assemblies (4) includes a connection wire (41) and a rotating member (42), the rotating member (42) includes a fixed portion (421) and a rotating portion (422), the rotating portion (422) is fixed on the discharge shaft (22) and rotates with the discharge shaft (22), and the rotating portion (422) is electrically connected with the electrical connection member (3); the fixed part (421) is rotationally connected with the rotating part (422), and the fixed part (421) is electrically connected with the rotating part (422); one end of the connecting wire (41) is electrically connected with the fixing part (421), and the other end of the connecting wire (41) is electrically connected with the short circuit detector (1).

5. The on-line battery core short circuit detection mechanism according to claim 4, wherein the rotating member (42) is a rolling bearing capable of conducting electricity, the fixed portion (421) is an outer ring of the rolling bearing, and the rotating portion (422) is an inner ring of the rolling bearing.

6. The on-line battery core short circuit detection mechanism according to claim 4, wherein the supporting frame (21) is provided with a clamping piece (211), the clamping piece (211) is connected with the fixing portion (421), and the fixing portion (421) is fixed with the supporting frame (21) through the clamping piece (211).

7. The on-line battery core short circuit detection mechanism according to claim 4, wherein one end of the connecting wire (41) for connecting the fixing portion (421) is provided with a ring connecting portion (411), the ring connecting portion (411) is annularly arranged on the outer wall of the fixing portion (421), and the ring connecting portion (411) and the fixing portion (421) are fixed by welding.

8. The on-line battery core short circuit detection mechanism according to claim 4, wherein an annular groove (4210) is provided on an outer wall of the fixing portion (421), and the connection wire (41) is fixedly connected in the annular groove (4210).

9. An on-line battery core short circuit detection mechanism according to any one of claims 1-8, characterized in that the blanking shaft (22) is an inflatable shaft.