CN115507923A

CN115507923A - Battery coating pole piece sampling and weighing device

Info

Publication number: CN115507923A
Application number: CN202211154108.7A
Authority: CN
Inventors: 张鹏; 沈正阳; 贾永富; 薛凯; 曹仕良
Original assignee: Dalian CBAK Power Battery Co Ltd
Current assignee: Dalian CBAK Power Battery Co Ltd
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2022-12-23

Abstract

The invention provides a battery coating pole piece sampling and weighing device, which comprises: the weighing device comprises an upper die assembly, a lower die assembly and a weighing assembly, wherein the lower die assembly is arranged below the upper die assembly; the upper die assembly comprises an upper mounting plate, a punch and a fixing piece, the punch is vertically arranged on the bottom surface of the upper mounting plate, the fixing piece is sleeved and connected with the punch, the punch can move up and down along the inner wall surface of the fixing piece, and the fixing piece is used for matching with the top surface of the lower die assembly to fix the battery coating pole piece; the lower die assembly comprises a lower mounting plate, a punched hole is arranged on the lower mounting plate, and the punched hole is matched with the punch so as to take down the battery coating pole piece covered by the punch; the weighing assembly is arranged close to the lower die assembly and is used for acquiring the weight of the taken down battery coating pole piece. The invention can quickly sample on line, fix the battery coating pole piece between the fixing piece and the lower mounting plate, avoid the battery coating pole piece from moving in the sampling process, and improve the precision and the product quality.

Description

Battery coating pole piece sampling and weighing device

Technical Field

The invention relates to the technical field of battery production equipment, in particular to a sampling and weighing device for a battery coating pole piece.

Background

At present, lithium batteries are widely applied to electric tools in various industries, and bring great convenience to people in various aspects such as transportation and travel. The lithium battery coating process is to coat the slurry on the upper surface of the base material, the slurry enters the oven along with the base material, and the oven dries the slurry by hot air.

The quality of a pole piece in a coating process is of great importance to the performance and safety of a battery cell, an online thickness gauge is adopted to detect the quality of a coated product at present, and the calibration precision of the thickness gauge influences the actual quality of the surface density of the pole piece in the actual use process of the thickness gauge.

The calibration of the thickness gauge is in an off-line mode, namely the thickness gauge scans, then takes the average surface density value of a scanning area, records the average surface density value (displayed by equipment), then manually takes a point near the scanning area of the thickness gauge, and then compares the sampled weighing data with the display data of the thickness gauge, but the coating pole piece is easy to move in the manual sampling process, the position precision is low, and the strip breakage is easy to occur.

Disclosure of Invention

The invention provides a sampling and weighing device for a battery coating pole piece, which is used for solving the problems that the coating pole piece is easy to move, the position precision is low and the belt breakage is easy to occur in the manual sampling process in the prior art.

The invention provides a battery coating pole piece sampling and weighing device, which comprises: the lower die assembly is arranged below the upper die assembly; the upper die assembly comprises an upper mounting plate, a punch and a fixing piece, the punch is vertically arranged on the bottom surface of the upper mounting plate, the fixing piece is sleeved on the punch and can move up and down along the inner wall surface of the fixing piece, and the fixing piece is used for matching with the top surface of the lower die assembly to fix a battery coating pole piece; the lower die assembly comprises a lower mounting plate, a punched hole is formed in the lower mounting plate, and the punched hole is matched with the punch so as to take down the battery coating pole piece covered by the punch; the weighing assembly is close to the lower die assembly and used for obtaining the weight of the battery coating pole piece taken down.

According to the sampling and weighing device for the battery coating pole piece, provided by the invention, the bottom surface of the punch is provided with a plurality of bosses, the bosses extend towards the center of the punch, and the bosses are arranged along the circumferential direction of the punch.

According to the sampling and weighing device for the battery coating pole piece, provided by the invention, the thickness of the boss is gradually increased from the center to the circumference of the punch.

According to the battery coating pole piece sampling and weighing device provided by the invention, the battery coating pole piece sampling and weighing device further comprises a buffer piece, and the buffer piece is arranged between the fixing piece and the upper mounting plate.

According to the battery coating pole piece sampling and weighing device provided by the invention, the battery coating pole piece sampling and weighing device further comprises a limiting piece, the upper mounting plate is provided with at least one first limiting hole, the lower mounting plate is correspondingly provided with at least one second limiting hole, the first limiting hole and the second limiting hole are in one-to-one correspondence, the limiting piece penetrates through the first limiting hole and the second limiting hole, the top end of the limiting piece is arranged above the first limiting hole, and the bottom end of the limiting piece is arranged below the second limiting hole, so that the upper die assembly and the lower die assembly can move relatively or back to back along the limiting piece.

According to the battery coating pole piece sampling and weighing device provided by the invention, the battery coating pole piece sampling and weighing device further comprises a collecting assembly, the collecting assembly is provided with an opening, the opening is arranged right below the punched hole, and the weighing assembly is arranged below the collecting assembly.

According to the battery coating pole piece sampling and weighing device provided by the invention, the upper die assembly further comprises a first driving mechanism, the lower die assembly further comprises a second driving mechanism, and the first driving mechanism is connected to the upper mounting plate and used for driving the upper die assembly to move up and down; the second driving mechanism is connected to the lower mounting plate and used for driving the lower die assembly to move up and down.

According to the battery coating pole piece sampling and weighing device provided by the invention, the battery coating pole piece sampling and weighing device further comprises a controller, and the first driving mechanism and the second driving mechanism are respectively connected with the controller.

According to the battery coating pole piece sampling and weighing device provided by the invention, the battery coating pole piece sampling and weighing device further comprises a torque detection assembly, and the torque detection assembly is used for acquiring the torque of the upper die assembly and/or the lower die assembly.

According to the battery coating pole piece sampling and weighing device provided by the invention, the battery coating pole piece sampling and weighing device further comprises a fixing frame, the fixing frame can move along the direction perpendicular to the moving direction of the battery coating pole piece, the upper die assembly is connected to the top of the fixing frame, and the lower die assembly is connected to the bottom of the fixing frame.

According to the sampling and weighing device for the battery coating pole piece, provided by the invention, the punch head is arranged on the upper mounting plate, the fixing piece is sleeved on the punch head, the punch head can move up and down along the inner wall surface of the fixing piece, the bottom surface of the fixing piece is in contact with the top surface of the lower mounting plate, the battery coating pole piece can be fixed between the fixing piece and the lower mounting plate, and the battery coating pole piece is prevented from moving; the lower mounting plate is provided with the punched holes, the punch is matched with the punched holes, the punch and the punched holes move relatively under the action of external force, the punch can punch samples with the same size as the punched holes, and the structure can quickly sample and is high in efficiency; be close to the bed die subassembly and be provided with the subassembly of weighing, the subassembly of weighing can acquire the sample mass of dashing down, can weigh the sample fast, avoids producing the weighing error at the sampling in-process, improves calibration accuracy and product quality.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a battery coating pole piece sampling and weighing device with a thickness gauge provided by the invention;

FIG. 2 is a schematic structural view of a battery coating pole piece sampling and weighing device provided by the invention;

FIG. 3 is a schematic structural view of an upper mold assembly provided by the present invention;

FIG. 4 is a schematic structural view of a lower mold assembly provided by the present invention;

reference numerals:

100: an upper die assembly; 110: an upper mounting plate; 111: a first limit hole; 120: a punch; 130: a fixing member; 140: a buffer member; 150: a first drive mechanism; 200: a lower die assembly; 210: a lower mounting plate; 211: punching; 212: a second limiting hole; 220: a second drive mechanism; 300: a limiting member; 400: a collection assembly; 500: a fixed mount; 600: a thickness gauge.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The following describes the battery coating pole piece sampling and weighing device provided by the invention with reference to fig. 1 to 4.

The invention provides a battery coating pole piece sampling and weighing device, which comprises: an upper die assembly 100 and a lower die assembly 200, the lower die assembly 200 being provided below the upper die assembly 100; the upper die assembly 100 comprises an upper mounting plate 110, a punch 120 and a fixing member 130, wherein the punch 120 is vertically arranged on the bottom surface of the upper mounting plate, the fixing member 130 is sleeved on the punch 120, the punch 120 can move up and down along the inner wall surface of the fixing member 130, and the fixing member 130 is used for matching with the top surface of the lower die assembly 200 to fix the battery coating pole piece; the lower die assembly 200 comprises a lower mounting plate 210, a punched hole 211 is arranged on the lower mounting plate 210, and the punched hole 211 is matched with the punch 120 so as to take down the battery coating pole piece covered by the punch 120; the subassembly of weighing, the subassembly of weighing is close to lower die assembly 200 and sets up, and the subassembly of weighing is used for acquireing the weight of the battery coating pole piece that takes off.

Referring to fig. 1, the battery coating pole piece sampling and weighing device provided by the present invention is disposed near a thickness meter 600, specifically, the thickness meter 600 is disposed perpendicular to the moving direction of the battery coating pole piece, the battery coating pole piece sampling and weighing device is disposed opposite to the thickness meter 600, the battery coating pole piece sampling and weighing device is disposed in the radiation range of the thickness meter 600, that is, the fixed-point scanning is realized by the original fixed-point scanning function of the thickness meter, the sampling range of the battery coating pole piece sampling device is located in the measuring range of the thickness meter 600, and the fixed-point sampling is performed, so as to realize the online calibration of the thickness meter 600.

Referring to fig. 2, the sampling and weighing device for a battery coated pole piece provided by the present invention includes an upper die assembly 100, a lower die assembly 200, and a weighing assembly, wherein the lower die assembly 200 is disposed below the upper die assembly 100, the upper die assembly 100 and the lower die assembly 200 move relatively to be able to take down the battery coated pole piece located therebetween, the weighing assembly is able to weigh the taken-down battery coated pole piece, obtain an actual weight of the taken-down battery coated pole piece, compare the actual weight with a weight obtained by the thickness gauge 600, and the thickness gauge 600 can be normally used when a deviation between the actual weight and the weight is within a preset range (for example, less than 0.5%), and the thickness gauge 600 cannot be normally used when a deviation between the actual weight and the weight is not within the preset range (for example, greater than or equal to 0.5%).

Referring to fig. 3, the upper mold assembly 100 includes an upper mounting plate 110 and a punch 120, the punch 120 being perpendicularly attached to a bottom surface of the upper mounting plate 110, and the punch 120 extending away from the upper mounting plate 110; further, the upper die assembly 100 further includes a fixing member 130, the fixing member 130 is sleeved on the punch 120, the punch 120 can move up and down along the inner wall surface of the fixing member 130, the fixing member 130 contacts with the top surface of the lower die assembly 200, and the battery coating pole piece located between the upper die assembly 100 and the lower die assembly 200 can be fixed, so as to prevent the battery coating pole piece from moving.

Referring to fig. 3, the lower mold assembly 200 further includes a lower mounting plate 210, on which a punched hole 211 is formed, a size of the punched hole 211 is adapted to a size of the punch 120, and the upper mold assembly 100 and the lower mold assembly 200 are controlled to move relatively, so that the punch 120 can be placed in the punched hole 211, and a sample having the same size as the punched hole 211 can be rapidly punched.

Further, battery coating pole piece sample weighing device still includes the subassembly of weighing, and the subassembly of weighing is close to lower mould subassembly 200 and sets up, and in an embodiment, the subassembly of weighing is located and is punched a hole 211 under, and the sample that drift 120 was punched down directly falls into the subassembly of weighing, and the subassembly of weighing can weigh the sample that is punched a hole 211 and dash out, acquires the weight of sample.

According to the invention, the punch is arranged on the upper mounting plate, the fixing piece is sleeved on the punch, the punch can move up and down along the inner wall surface of the fixing piece, the bottom surface of the fixing piece is contacted with the top surface of the lower mounting plate, and the battery coating pole piece can be fixed between the fixing piece and the lower mounting plate, so that the battery coating pole piece is prevented from moving; through arranging the punched holes on the lower mounting plate, the punch is matched with the punched holes, the punch and the punched holes move relatively under the action of external force, the punch can punch samples with the same size as the punched holes, and the structure can quickly sample and has high efficiency; be close to the bed die subassembly and be provided with the subassembly of weighing, the subassembly of weighing can acquire the sample mass of dashing down, can weigh the sample fast, avoids producing the weighing error at the sampling in-process, improves calibration accuracy and product quality.

According to the invention, through the relative movement of the upper die assembly 100 and the lower die assembly 200, the punch 120 can punch the battery coating pole piece with the same size as the punched hole 211, so that compared with manual sampling, the device downtime caused by manual misoperation is reduced, the labor cost is saved, the sampling precision is high, the calibration precision of the thickness gauge 600 is improved, the quality of the battery coating pole piece is further improved, and the belt breakage of the battery coating pole piece is avoided.

In one embodiment, a sinking platform is arranged on the lower mounting plate 210, a punched hole 211 is arranged at the bottom of the sinking platform, the fixing member 130 is embedded at the sinking platform to fix the battery coating pole piece, and the punch 120 is matched with the punched hole 211 to punch out a sample with the same size as the punched hole 211.

In addition to the above embodiment, the bottom surface of the punch 120 is provided with a plurality of bosses extending toward the center of the punch 120, and the plurality of bosses are provided along the circumferential direction of the punch 120.

In one embodiment, the bottom surface of the punch 120 is provided with four bosses, the four bosses are uniformly distributed along the circumferential direction of the punch 120, each boss extends towards the center of the punch 120, the upper die assembly 100 and the lower die assembly 200 move relatively, the punch 120 is matched with the punching hole 211, and the four bosses are preferentially contacted with the battery coating pole piece between the fixing member 130 and the lower mounting plate 210, so that the sample can be quickly punched.

On the basis of the above embodiment, further, the thickness of the boss gradually increases from the center to the circumference of the punch 120.

Specifically, relative movement between the upper die assembly 100 and the lower die assembly 200, the punch 120 and the punched hole 211 are matched, the periphery of the boss on the bottom surface of the punch 120 is preferentially contacted with the battery coating pole piece between the fixing piece 130 and the lower mounting plate 210, a sample can be rapidly punched, burrs are prevented from being generated on the periphery of the punched sample, the sampling precision is improved, the calibration precision of the thickness gauge 600 is improved, and the quality of the battery coating pole piece is further improved.

In this embodiment, the number and the structure of the bosses on the bottom surface of the punch 120 are not specifically limited, and the sample can be quickly punched down, so that burrs are prevented from being generated on the periphery of the sample, or material falling is prevented from being generated in the process of punching down the sample.

On the basis of the above embodiment, the battery coating pole piece sampling and weighing device further includes a buffer member 140, and the buffer member 140 is disposed between the fixing member 130 and the upper mounting plate 110.

In one embodiment, the buffer 140 is a spring, and the spring is sleeved on the punch 120 and located between the fixing element 130 and the upper mounting plate 110 for reducing the pressure, so as to prevent the fixing element 130 from pressing the battery coating pole piece under an excessive pressure under the action of an external force.

In one embodiment, the plurality of buffers 140 is provided, the plurality of buffers 140 are each located between the upper mounting plate 110 and the fixing member 130, and the plurality of buffers 140 are distributed along the outer circumference of the punch 120.

The buffer member 140 in this embodiment is not particularly limited, and may be configured to achieve buffering.

On the basis of the above embodiment, further, the battery coating pole piece sampling and weighing device further includes a limiting member 300, the upper mounting plate 110 is provided with at least one first limiting hole 111, the lower mounting plate 210 is correspondingly provided with at least one second limiting hole 212, the first limiting hole 111 and the second limiting hole 212 are in one-to-one correspondence, the limiting member 300 penetrates through the first limiting hole 111 and the second limiting hole 212, wherein the top end of the limiting member 300 is disposed above the first limiting hole 111, and the bottom end of the limiting member 300 is disposed below the second limiting hole 212, so that the upper mold assembly 100 and the lower mold assembly 200 can move relatively or move back to back along the limiting member 300.

For punching down battery coating pole piece fast in this embodiment, go up mould assembly 100 and lower mould assembly 200 and carry on spacingly through locating part 300 to make drift 120 and the coaxial setting all the time of 211 that punches a hole, avoid drift 120 and the position of 211 that punches a hole to take place the skew, lead to drift and lower mounting panel 210 to take place to interfere, the deviation takes place for the sampling position.

Referring to fig. 2, two first limiting holes 111 are formed in the upper mounting plate 110, two second limiting holes 212 are correspondingly formed in the lower mounting plate 210, the first limiting holes 111 and the second limiting holes 212 correspond to each other one by one, and the central axis of the punch 120 and the central axis of the punched hole 211 are collinear; further, the limiting member 300 sequentially passes through the first limiting hole 111 of the upper mounting plate 110 and the second limiting hole 212 of the lower mounting plate 210, wherein the top end of the limiting member 300 is located above the first limiting hole 111, the bottom end of the limiting member 300 is located below the second limiting hole 212, the upper die assembly 100 and the lower die assembly 200 are connected to enable the central axis of the punch 120 and the central axis of the punched hole 211 to be always in a collinear state, the upper die assembly 100 and the lower die assembly 200 can move along the limiting member 300 relatively or away from each other, under the condition that the two move relatively, the punch 120 can punch a sample quickly, and under the condition that the two move away from each other, the sampling position can be changed according to an actual situation.

In this embodiment, the upper die assembly 100 and the lower die assembly 200 are connected by the stopper 300, so that the central axis of the punch 120 and the central axis of the punched hole 211 are always collinear, thereby preventing the upper die assembly 100 and the lower die assembly 200 from changing in the process of moving relatively or away from each other, and improving the sampling precision.

In this embodiment, the number of the first position-limiting holes 111, the second position-limiting holes 212 and the position-limiting members 300 is not particularly limited, and the first position-limiting holes 111, the second position-limiting holes 212 and the position-limiting members 300 may correspond to one another.

On the basis of the above embodiment, further, the battery coating pole piece sampling and weighing device further includes a collection assembly 400, the collection assembly 400 has an opening, the opening is disposed right below the punched hole 211, and the weighing assembly is disposed below the collection assembly 400.

Referring to fig. 4, the collection assembly 400 is slidably coupled to the bottom surface of the lower mounting plate 210, and the collection assembly 400 can be slidably mounted to the lower mounting plate 210 or the collection assembly 400 can be detached by sliding; the collection assembly 400 has an opening facing upward and located right below the punched hole 211, and under the condition that the upper mold assembly 100 and the lower mold assembly 200 move relatively, the punch 120 can rapidly punch a sample with the same size as the punched hole 211, and the sample can directly fall into the collection assembly 400 to prevent the sample from rolling off.

Further, on collection subassembly 400 located the subassembly of weighing, the subassembly of weighing can weigh the sample that falls into in the collection subassembly 400 fast, raises the efficiency.

In this embodiment, the setting position of the weighing component is not particularly limited, and the sample in the collecting component 400 may be manually taken out and placed on the weighing component for weighing.

The connection between the collection member 400 and the lower mounting plate 210 is not particularly limited in this embodiment, and it is sufficient to ensure that the opening of the collection member 400 is located right below the punched hole 211 so that the punched sample falls into the collection member 400.

On the basis of the above embodiment, the upper die assembly 100 further comprises a first driving mechanism 150, and the lower die assembly 200 further comprises a second driving mechanism 220, wherein the first driving mechanism 150 is connected to the upper mounting plate 110 and is used for driving the upper die assembly 100 to move up and down; the second driving mechanism 220 is connected to the lower mounting plate 210 for driving the lower mold assembly 200 to move up and down.

Referring to fig. 3, the upper mold assembly 100 further includes a first driving mechanism 150, the first driving mechanism 150 is connected to the upper mounting plate 110, and the first driving mechanism 150 can drive the upper mounting plate 110 and the punch 120 to move up and down; the lower die assembly 200 further comprises a second driving mechanism 220, the second driving mechanism 220 is connected to the lower mounting plate 210, the second driving mechanism 220 can drive the lower mounting plate 210 to move up and down, that is, the first driving mechanism 150 drives the upper mounting plate 110 and the punch 120 to move down, and the second driving mechanism 220 drives the lower mounting plate 210 to move up, so that the punch 120 is matched with the punched hole 211 on the lower mounting plate 210, and then a sample with the same size as the punched hole 211 is punched.

On the basis of the above embodiment, further, the battery-coated pole piece sampling and weighing device further includes a controller, and the first driving mechanism 150 and the second driving mechanism 220 are respectively connected to the controller.

Specifically, a sampling position is determined according to the position of the thickness gauge 600, after the sampling position is determined, the controller controls the first driving mechanism 150 to drive the upper die assembly 100 to move downwards, and controls the second driving mechanism 220 to drive the lower die assembly 200 to move upwards, namely, the upper die assembly 100 and the lower die assembly 200 move relatively, so that the punch 120 and the punched hole 211 are matched, and a sample with the same size as the punched hole 211 is punched; after the sampling is completed, the controller controls the first driving mechanism 150 to drive the upper mold assembly 100 to move upward, and the controller controls the second driving mechanism 220 to drive the lower mold assembly to move downward, so as to prepare for the next sampling.

In one embodiment, the first driving mechanism 150 and the second driving mechanism 220 are driven by a screw rod through a servo motor, so as to drive the upper mold assembly 100 and the lower mold assembly 200 to move towards or away from each other.

On the basis of the above embodiment, further, the battery coating pole piece sampling and weighing device further includes a torque detection assembly, and the torque detection assembly is used for acquiring the torque of the upper die assembly 100 and/or the lower die assembly 200.

In order to avoid twisting the upper die assembly 100 and/or the lower die assembly 200 during sampling, which affects the sampling precision, the embodiment is provided with a torque detection assembly, which can obtain the torque of the upper die assembly 100, or the torque of the lower die assembly 200, or the torque of the upper die assembly 100 and the torque of the lower die assembly 200, and further determine whether the sampling position deviates, so as to improve the sampling position precision and the calibration precision of the thickness gauge 600.

On the basis of the above-mentioned embodiment, further, battery coating pole piece sampling weighing device still includes the pressure detection subassembly, and the pressure detection subassembly is used for the pressure of lower die assembly 200, compares through initial pressure, judges the position of going up die assembly 100 and lower die assembly 200, ensures the central axis of drift 120 and the central axis collineation of 211 that punches a hole, avoids taking place the skew, influences the precision of sample.

On the basis of the above embodiments, the battery coating pole piece sampling and weighing apparatus provided in this embodiment further includes a fixing frame 500, the fixing frame 500 can move along a direction perpendicular to the moving direction of the battery coating pole piece, the upper mold assembly 100 is connected to the top of the fixing frame 500, and the lower mold assembly 200 is connected to the bottom of the fixing frame 500.

Referring to fig. 1, the fixing frame 500 is a movable support, for example, a pulley is disposed at the bottom of the fixing frame 500, and the fixing frame 500 can move in a direction perpendicular to a battery coating pole piece to change a sampling position; further, the fixing frame 500 includes a top portion, a bottom portion and a connecting portion, and one side of the top portion and one side of the bottom portion of the fixing frame 500 are connected by the connecting portion; wherein the upper mold assembly 100 is connected to the top of the fixing frame 500, i.e., the first driving mechanism 150 is connected to the top of the fixing frame 500, and the lower mold assembly 200 is connected to the bottom of the fixing frame 500, i.e., the second driving mechanism 220 is connected to the bottom of the fixing frame 500, thereby driving the upper mold assembly 100 and the lower mold assembly 200 to move up and down between the top and the bottom of the fixing frame 500.

Further, thickness gauge 600 includes probe and lower probe, wherein go up the probe and connect in the top of mount 500, lower probe is connected in the bottom of mount 500, the battery coating pole piece is located between probe and the lower probe, and be located between mould assembly 100 and lower mould assembly 200, thickness gauge 600 and battery coating pole piece sample weighing device can move along the direction that perpendicular to coating pole piece removed, and battery coating pole piece sample weighing device is located thickness gauge 600 radiation range, detection range promptly, realize calibration data and battery coating pole piece sample position one-to-one.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a battery coating pole piece sample weighing device which characterized in that includes: the lower die assembly is arranged below the upper die assembly;

the upper die assembly comprises an upper mounting plate, a punch and a fixing piece, the punch is vertically arranged on the bottom surface of the upper mounting plate, the fixing piece is sleeved on the punch and can move up and down along the inner wall surface of the fixing piece, and the fixing piece is used for matching with the top surface of the lower die assembly to fix a battery coating pole piece;

the lower die assembly comprises a lower mounting plate, a punched hole is formed in the lower mounting plate, and the punched hole is matched with the punch so as to take down the battery coating pole piece covered by the punch;

the weighing assembly is close to the lower die assembly and used for obtaining the weight of the battery coating pole piece taken down.

2. The device as claimed in claim 1, wherein the bottom surface of the punch is provided with a plurality of bosses extending toward the center of the punch, and the plurality of bosses are arranged along the circumferential direction of the punch.

3. The coated pole piece sampling and weighing device of claim 2, wherein the boss has a thickness that gradually increases from the center to the circumference of the punch.

4. The device of claim 1, further comprising a buffer member disposed between the fixing member and the upper mounting plate.

5. The device for sampling and weighing battery-coated pole pieces according to claim 1, further comprising a limiting member, wherein the upper mounting plate is provided with at least one first limiting hole, the lower mounting plate is correspondingly provided with at least one second limiting hole, the first limiting hole corresponds to the second limiting hole in a one-to-one manner, the limiting member penetrates through the first limiting hole and the second limiting hole, wherein the top end of the limiting member is disposed above the first limiting hole, and the bottom end of the limiting member is disposed below the second limiting hole, so that the upper die assembly and the lower die assembly can move relatively or back to back along the limiting member.

6. The device for sampling and weighing battery-coated pole pieces as claimed in claim 1, further comprising a collection assembly having an opening disposed directly under the punched hole, wherein the weighing assembly is disposed under the collection assembly.

7. The battery-coated pole piece sampling and weighing device of claim 1, wherein the upper die assembly further comprises a first driving mechanism, the lower die assembly further comprises a second driving mechanism, and the first driving mechanism is connected to the upper mounting plate and used for driving the upper die assembly to move up and down; the second driving mechanism is connected to the lower mounting plate and used for driving the lower die assembly to move up and down.

8. The device of claim 7, further comprising a controller, wherein the first and second driving mechanisms are respectively connected to the controller.

9. The device of claim 1, further comprising a torque detection assembly for obtaining torque of the upper die assembly and/or the lower die assembly.

10. The device of claim 1, further comprising a fixing frame, wherein the fixing frame can move along a direction perpendicular to the moving direction of the battery coating pole piece, the upper mold assembly is connected to the top of the fixing frame, and the lower mold assembly is connected to the bottom of the fixing frame.