CN220120007U - Pole piece measuring device - Google Patents

Abstract

The utility model relates to the technical field of battery pole piece production, in particular to a pole piece measuring device, which comprises a base, wherein a measuring assembly for detecting the side offset of a pole piece to be measured is arranged on the base, the measuring assembly comprises a first measuring block, an inner sliding block and an outer sliding block, the inner sliding block and the outer sliding block are arranged on the first measuring block in a sliding manner, the inner sliding block and the outer sliding block are arranged oppositely, and the inner sliding block and the outer sliding block are used for positioning two sides of the pole piece to be measured; the two sides of the measuring assembly are respectively provided with a first supporting rod and a second supporting rod which are used for supporting the pole piece to be measured. The device can measure the arc and the wave on the pole piece at the same time, is beneficial to reducing the operation steps of multi-step detection of pole piece procedures, improves the detection efficiency and has high practicability.

Description

Pole piece measuring device

Technical Field

The utility model relates to the technical field of battery pole piece production, in particular to a pole piece measuring device.

Background

The pole piece is an important part of the battery and is divided into a positive pole piece and a negative pole piece. The positive plate is coated with slurry containing lithium ions on aluminum platinum, and the negative plate is coated with slurry containing graphite as a main component on copper platinum; during manufacturing, the positive and negative electrode plates are separated by diaphragm paper, the positive and negative electrode plates and the diaphragm of the battery are wound along the winding needle and then are wound into a shape required by the shape, and the electrode lugs are exposed after the winding of the electrode plates and the diaphragm is completed, so that the battery can be charged and discharged conveniently.

In the prior art, in the production process of the lithium ion battery pole piece, the pole piece is subjected to uneven horizontal tension and vertical pressure at different positions in a coating process, a rolling process and a slitting process, so that the local ductility of the pole piece is different, and even the pole piece is deformed; the waveform warp in the thickness direction and the bending in the length direction are expressed in appearance due to the difference in extensibility and the occurrence of deformation, and are called a wave and an arc, respectively. Wave and arc can have great influence to follow-up winding process, under the effect of unreeling tension and winding tension on the winder, because wave and curved existence pole piece length direction both sides limit received pulling force can be different, can lead to like this the pole piece to incline to have arc and wave along width direction, influence the positive and negative pole alignment degree of core to directly influence the security performance of battery.

In order to reduce the influence of waves and arcs on the winding process, the detection of waves and arcs on the edge roll after the pole piece is cut is needed. During detection, a section of pole piece sample needs to be taken off from the pole roll and then wave and arc measurement is carried out, after measurement is completed, the measurement sample is scrapped, the existing measuring device can only evaluate whether one parameter is qualified or not, the practicability is low, and the wave and the arc need to be respectively sampled and detected, so that the operation steps and the product rejection rate can be increased.

Disclosure of Invention

The utility model aims at: the pole piece measuring device is provided for solving the problems that in the prior art, only one parameter of waves and arcs can be evaluated to be qualified, the function is single, and an operation step is needed to be added in a pole piece procedure to measure the comprehensive influence of the arcs and the waves on the winding alignment degree.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the pole piece measuring device comprises a base, wherein a measuring assembly is arranged on the base and comprises a first measuring block, an inner sliding block and an outer sliding block, the inner sliding block and the outer sliding block are arranged on the first measuring block in a sliding manner, the inner sliding block and the outer sliding block are arranged oppositely, and the inner sliding block and the outer sliding block are used for positioning two side edges of a pole piece to be measured; the two sides of the measuring assembly are respectively provided with a first supporting rod and a second supporting rod which are used for supporting the pole piece to be measured.

According to the pole piece measuring device provided by the utility model, the two ends of the pole piece to be measured can be supported based on the first support rod and the second support rod, the positions of the two ends of the pole piece to be measured are aligned, so that the waves and the arc of the middle section of the pole piece to be measured can be detected, when the waves and the arc of the middle section are detected, the relative positions of the two side edges of the pole piece to be measured on the first measuring block are determined by sliding the inner sliding block and the outer sliding block on the first measuring block, so that the transverse offset (along the width direction) of the side edges can be determined according to the actual positions of the two side edges relative to the positions of the two ends of the pole piece, and meanwhile, the vertical offset can be determined according to the relative positions of the two side edges on the inner sliding block and the outer sliding block. The device can measure the arc and the wave on the pole piece simultaneously, and the device is favorable for reducing the operation steps of pole piece procedure multi-step detection, improving the detection efficiency and has high practicability.

Preferably, the base is vertical backplate structure, first bracing piece the measurement subassembly with the second bracing piece is the horizontal arrangement on the base respectively, and the pole piece that awaits measuring sets up in the time of detecting promptly and horizontal, convenient operation.

Preferably, the base is further provided with a pole coil fixing shaft, and the pole coil fixing shaft is used for fixing a pole coil. By adopting the device, the pole coil of the continuous winding pole piece can be directly fixed on the pole coil fixing shaft on the base, so that sampling and cutting are avoided, and the rejection rate of the pole piece is reduced.

Preferably, the base is provided with a tension arm, the tension arm is rotatably connected with the base, and the tension arm is connected with a driving motor. The tension arm is rotated by the driving motor, so that proper tension can be provided for the pole piece, and the tension is adjustable.

Preferably, a winding shaft is arranged on the base, and is used for rewinding the pole piece to be detected, so that the detected pole piece is conveniently recovered for a winding procedure.

Preferably, the first support rod and the second support rod are rollers, which is beneficial to reducing friction force.

Preferably, the first support rod and the second support rod are respectively provided with a groove, and the grooves are used for limiting the pole piece to be detected, so that the two ends of the pole piece to be detected can be conveniently and rapidly aligned. Or, setting scale marks on the first support rod and the second support rod; when the device is used, the two ends of the pole piece to be measured are aligned and set and read according to the scale marks marked on the first support rod and the second support rod, so that the measurement accuracy is ensured.

Preferably, the base is further provided with a second measuring block, the second measuring block is arranged opposite to the first measuring block, the second measuring block is slidably connected with the inner sliding block and the outer sliding block, and structural stability is higher.

As other preferable schemes, when the pole piece measuring device detects waves and arcs of the pole piece to be measured which is horizontally placed, gravity clamping pieces can be directly arranged at two ends of the pole piece to be measured, the pole piece to be measured is clamped by the gravity clamping pieces, and the pole piece to be measured is straightened under the action of gravity of the gravity clamping pieces at two sides, so that the waves and arcs are detected.

In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:

1. the pole piece measuring device provided by the utility model can be used for simultaneously measuring the arc and the wave on the pole piece, is not limited to only realizing the arc detection or wave detection function, is beneficial to reducing the operation steps of pole piece procedure multi-step detection, improves the detection efficiency, and has high practicability.

2. By adopting the pole piece measuring device provided by the utility model, the pole roll can be hung on the base to measure the wave and arc of the single pole piece, sampling and cutting are not needed, and the product rejection rate is reduced.

Drawings

Fig. 1 is a schematic structural view of a pole piece measuring device in embodiment 1.

Fig. 2 is a schematic view of the state of the pole piece measuring device when measuring the lateral offset of the pole piece.

Fig. 3 is a schematic view of the pole piece measuring device in a state in which the pole piece vertical offset is measured.

Icon: 1-a base; 2-a first measurement block; 3-an inner slide; 4-an outer slide block; 5-a first support bar; 6-a second support bar; 7-pole coil fixing shafts; 8-a tension arm; 9-winding shaft; 10-pole pieces to be measured; 11-a second measurement block.

Detailed Description

The present utility model will be described in detail with reference to the accompanying drawings.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Example 1

The pole piece measuring device comprises a base 1, wherein a measuring component for detecting the offset of the side edges of a pole piece 10 to be measured is arranged on the base 1, the measuring component comprises a first measuring block 2, an inner sliding block 3 and an outer sliding block 4, the inner sliding block 3 and the outer sliding block 4 are connected to the first measuring block 2 in a sliding manner, the inner sliding block 3 and the outer sliding block 4 are oppositely arranged, and the inner sliding block 3 and the outer sliding block 4 are enabled to adapt to the positions of the two side edges of the pole piece 10 to be measured of a specific type by moving the inner sliding block 3 and the outer sliding block 4 close to or far away from the two side edges of the pole piece 10 to be measured, so that the two side edges of the pole piece 10 to be measured are positioned; the two sides of the measuring assembly are respectively provided with a first supporting rod 5 and a second supporting rod 6 for supporting the pole piece 10 to be measured. When the device is used, the two ends of the pole piece 10 to be measured are respectively wound around the first support rod 5 and the second support rod 6, so that the two ends of the pole piece 10 to be measured are respectively aligned with specific positions on the first support rod 5 and the second support rod 6 (the distance between the inner side edge of the end part of the pole piece 10 to be measured and the base 1 is marked as a), and the pole piece 10 to be measured is straightened based on the specific positions on the first support rod 5 and the second support rod 6, and at the moment, the pole piece 10 to be measured is positioned between the inner slide block 3 and the outer slide block 4; the relative position of the inner side edge of the pole piece 10 to be measured on the first measuring block 2 is determined by sliding the inner sliding block 3 on the first measuring block 2 to the position of the inner side edge of the pole piece 10 to be measured, and is recorded as a measuring distance A, as shown in fig. 2, the transverse offset of the inner side edge of the pole piece 10 to be measured is determined according to the difference value between the measuring distance A and the theoretical distance a, and similarly, the transverse displacement of the outer side edge can also be determined in the same manner; meanwhile, as shown in fig. 3, the vertical deviation amounts (the deviation of the actual vertical position from the theoretical vertical position) of the two sides are judged according to the relative positions of the inner side edge and the outer side edge on the inner sliding block 3 and the outer sliding block 4 respectively, so that the influence of the waves and the arc on the alignment degree of the winding core on the pole piece is comprehensively judged.

Specifically, in this embodiment, the base adopts the vertical backplate structure, and first bracing piece 5, measurement subassembly and second bracing piece 6 are arranged in proper order to the level on base 1, and pole piece 10 that awaits measuring sets up in the front side of backplate level during the detection, convenient operation. The left side of first bracing piece 5 still is equipped with the utmost point of being used for fixed utmost point to roll up fixed axle 7, and the utmost point in this implementation is rolled up fixed axle that expands extremely, can be with the utmost point of cup jointing roll up through modes expansion fixation such as foam or elastic rubber pad, can be directly when using the extremely roll up fixed epaxial that expands of extremely roll up on base 1 of continuous coiling pole piece, avoids the sample to tailor to reduce the pole piece disability rate. A tension arm 8 is further arranged between the first supporting rod 5 and the measuring component, the tension arm 8 is Z-shaped integrally and is positioned below the installation position of the pole piece 10 to be measured, the tension arm 8 body comprises three sections of vertically connected rod components, the cross section of the tension arm 8 is circular, one end of the tension arm 8 is used for pressing the pole piece 10 to be measured which is droops from the pole roll fixing shaft 7 and the first supporting rod 5, and the other end of the tension arm 8 penetrates through the base 1 to be connected with a motor; the rotation amplitude of the tension arm 8 is adjusted through the driving motor, so that the pole piece 10 to be tested is in a tensioning state, and proper tensioning force is provided for the pole piece, and the tensioning force is adjustable. A winding shaft 9 is further arranged below the second supporting rod 6, the winding shaft 9 is used for rewinding the pole piece 10 to be detected, the detected pole piece is convenient to recycle for a winding procedure, and the winding shaft 9 is controlled to rotate through a motor, so that a certain tensile force can be provided for tensioning the pole piece. The first support rod 5 and the second support rod 6 in this embodiment are rollers, and can automatically rotate along with the pole piece sliding when the pole piece is rewound by using the winding shaft 9, so that the friction force between the pole piece 10 to be detected and the rollers is small, or the rotation direction and the rotation speed of the first support rod 5 and the second support rod 6 can be controlled by adopting motors respectively, so as to realize automatic detection. Further, in this embodiment, grooves are respectively provided at specific positions on the first support rod 5 and the second support rod 6, the grooves are used for limiting the pole piece 10 to be measured, two ends of the pole piece 10 to be measured are conveniently and rapidly aligned, the distance between the two groove positions and the base 1 is the same, and the width of the grooves is basically consistent with the width of the pole piece.

The measuring assembly further comprises a second measuring block 11, the second measuring block 11 and the first measuring block 2 are oppositely arranged, the second measuring block 11 is connected with the inner sliding block 3 and the outer sliding block 4 in a sliding mode, and structural stability is high. The inner slide 3 and the outer slide 4 are vertically provided with scale marks for indicating the side positions, and the first measuring block 2 and the second measuring block 11 are provided with scale marks for indicating the relative positions of the side edges of the pole pieces from the base 1 along the moving direction of the inner slide 4 and the outer slide 4. The measuring assembly can be of a distributed structure, for example, a first measuring block 2 and a second measuring block 11 are respectively and fixedly arranged on the base 1; integral members, such as U-shaped structures, may also be employed.

The pole piece measuring device can measure the arc and the wave on the pole piece simultaneously, and the device is beneficial to reducing the operation steps of pole piece procedure multi-step detection, improving the detection efficiency and has high practicability.

Example 2

The embodiment provides a pole piece measuring device, compares the mode that the first bracing piece 5 and the second bracing piece 6 in embodiment 1 make both ends align the setting through adopting the spacing pole piece 10 position that awaits measuring of groove structure, adopts the mode substitution of scale mark on first bracing piece 5 and second bracing piece 6 in this embodiment, and wherein the initial position 0 scale on first bracing piece 5 and the second bracing piece 6 all is located base 1 department, and zero scale position on inner slider 3 and the outer slider 4 is placed in the middle and is corresponding with the pole piece 10 position that awaits measuring in the ideal. When the device is used, the two ends of the pole piece 10 to be measured are aligned and arranged according to the same marked positions marked on the first support rod 5 and the second support rod 6, so that the device can directly read, improve the measurement accuracy, adapt to pole pieces with different sizes, and is good in applicability.

Example 3

The embodiment provides a pole piece measuring device, which comprises a base, first bracing piece, measurement subassembly and second bracing piece transversely arrange on the base in proper order, first bracing piece and second bracing piece adopt the roller structure that has the scale, measurement subassembly includes first measuring block, the second measures the board, interior sliding block and outer slider, first measuring block and second measuring block set up relatively, interior sliding block and outer slider set up relatively and lie in between first measuring block and the second measuring block, interior sliding block and outer slider are with the first measuring block of both sides, second measuring block sliding connection, interior sliding block and outer slider can be close to or keep away from the removal relatively to await measuring pole piece both sides limit.

During the use, tailors the pole piece and take a sample, walk around first bracing piece and second bracing piece after connecting gravity holder respectively with the pole piece both ends that await measuring, through gravity holder centre gripping pole piece that await measuring, the pole piece that awaits measuring is straightened under the action of the gravity of both sides gravity holder, and interior side and outside limit that slip interior slider and outer slider made the pole piece of pressing close to respectively, horizontal offset and vertical offset of outside limit in the pole piece are confirmed to the vertical scale mark on the horizontal mark and the interior and exterior slider on the first measurement piece.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. The pole piece measuring device is characterized by comprising a base (1), wherein a measuring assembly is arranged on the base (1), the measuring assembly comprises a first measuring block (2), an inner sliding block (3) and an outer sliding block (4), the inner sliding block (3) and the outer sliding block (4) are arranged on the first measuring block (2) in a sliding mode, the inner sliding block (3) and the outer sliding block (4) are arranged oppositely, and the inner sliding block (3) and the outer sliding block (4) are used for positioning two side edges of a pole piece (10) to be measured; the two sides of the measuring assembly are respectively provided with a first supporting rod (5) and a second supporting rod (6) which are used for supporting the pole piece (10) to be measured.

2. The pole piece measuring device according to claim 1, wherein the base is a vertical back plate structure, and the first support rod (5), the measuring assembly and the second support rod (6) are respectively arranged on the base (1) in a horizontal arrangement.

3. A pole piece measuring device according to claim 2, further comprising a gravity clamp for clamping both ends of the pole piece (10) to be measured.

4. A pole piece measuring device according to claim 1, characterized in that the base (1) is further provided with a pole roll fixing shaft (7), the pole roll fixing shaft (7) being used for fixing a pole roll.

5. The pole piece measuring device according to claim 1, wherein the base (1) is provided with a tension arm (8), the tension arm (8) is rotatably connected to the base (1), and the tension arm (8) is connected with a driving motor.

6. A pole piece measuring device according to claim 1, characterized in that the base (1) is provided with a winding shaft (9), the winding shaft (9) being used for rewinding the pole piece (10) to be measured.

7. A pole piece measuring device according to claim 1, characterized in that the first support bar (5) and the second support bar (6) are rollers.

8. A pole piece measuring device according to any of claims 1-7, characterized in that the first support bar (5) and the second support bar (6) are provided with grooves for limiting the pole piece (10) to be measured.

9. A pole piece measuring device according to any of claims 1-7, characterized in that the first support bar (5) and the second support bar (6) are provided with scale marks.

10. A pole piece measuring device according to any of claims 1-7, characterized in that the measuring assembly further comprises a second measuring block (11), the second measuring block (11) and the first measuring block (2) being arranged opposite each other, the second measuring block (11) being slidingly connected to the inner slide (3) and the outer slide (4).