Battery cell code scanning and weighing device and method thereof

Abstract

The invention relates to the technical field of battery cell code scanning and weighing, in particular to a battery cell code scanning and weighing device which comprises a first conveying mechanism, a first weighing mechanism, a second conveying mechanism, a second weighing mechanism and a third conveying mechanism which are connected in sequence, and the first weighing mechanism and the second weighing mechanism are the same in structure; a first code scanning instrument and a second code scanning instrument are respectively arranged above the first weighing mechanism and the second weighing mechanism, the first code scanning instrument is in an open state, the second code scanning instrument is in a closed state, and a first infrared sensor and a second infrared sensor are respectively arranged on one side of the upper part of the first weighing mechanism and one side of the upper part of the second weighing mechanism; the first weighing mechanism comprises a conveying belt, the second code scanning instrument is arranged, the second code scanning instrument does not work when the first code scanning instrument works normally, and electric energy is saved; and after the first code scanning instrument fails to scan the code, the second code scanning instrument is started to work and can continue to scan the code, so that the whole code scanning and weighing system is prevented from stopping working, and the working efficiency of the device is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery cell code scanning and weighing, and in particular to a battery cell code scanning and weighing device and a method thereof. Background Art

[0002] During the production process, battery cells generally need to be scanned and weighed to facilitate the screening of battery cells that do not meet quality requirements. The battery cell scanning and weighing devices currently used generally have a scanner and a weighing device on the conveyor line, which are used for scanning and weighing the battery cells respectively. When the scanner has a system failure and cannot scan the code normally, the entire conveyor line needs to be stopped for maintenance of the scanner. Stopping the entire conveyor line will greatly affect work efficiency, so it needs to be improved. Summary of the invention

[0003] The object of the present invention is to provide a battery cell scanning weighing device and method thereof to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A battery cell scanning and weighing device comprises a first conveying mechanism, a first weighing mechanism, a second conveying mechanism, a second weighing mechanism and a third conveying mechanism connected in sequence, wherein the first weighing mechanism and the second weighing mechanism have the same structure; a first barcode scanner and a second barcode scanner are respectively arranged above the first weighing mechanism and the second weighing mechanism, wherein the first barcode scanner is in an on state and the second barcode scanner is in a off state, and a first infrared sensor and a second infrared sensor are respectively arranged at one side above the first weighing mechanism and the second weighing mechanism; the first weighing mechanism comprises a conveyor belt; It also includes a first timer, a second timer and a screening mechanism arranged on one side of the third conveying mechanism; when the first infrared sensor detects the battery cell, the first timer works, the conveyor belt of the first weighing mechanism stops driving, the first barcode scanner scans the battery cell, and when the first timer reaches the set value, the first timer is reset and the conveyor belt of the first weighing mechanism continues to drive; When the first barcode scanner scans the barcode successfully, the conveyor belt of the second weighing mechanism does not stop driving. If the difference between the weighing values ​​of the second weighing mechanism and the first weighing mechanism is within the error value, the battery cell is conveyed out from the end of the third conveying mechanism. Otherwise, the screening mechanism conveys the battery cell out. When the first barcode scanner fails to scan the code, the second barcode scanner is turned on. When the second infrared sensor detects the battery cell, the second timer starts working, the conveyor belt of the second weighing mechanism stops transmitting, and the second barcode scanner scans the battery cell. When the second timer reaches the set value, the second timer is reset and the conveyor belt of the second weighing mechanism continues to transmit. If the difference between the weighing values ​​of the second weighing mechanism and the first weighing mechanism is within the error value and the second barcode scanner scans the code successfully, the battery cell is conveyed out from the end of the third conveying mechanism, otherwise, the screening mechanism conveys the battery cell out.

[0005] Preferably, the first weighing mechanism or the second weighing mechanism comprises a base, two parallel strip plates arranged above the base, two rollers are rotatably connected between the two strip plates, and the conveyor belt is sleeved on the two rollers, one of which is driven to rotate by a motor; a cavity is provided in the base, and weighing sensors are installed at the four corners of the bottom of the inner wall of the cavity, and presser feet are fixedly connected to the bottom of the strip plates at both ends, and the bottom end of the presser foot extends into the cavity and abuts against the weighing sensor.

[0006] Preferably, it also includes a first door frame, the two ends of which are respectively fixedly connected to the two strip plates of the first weighing mechanism, the first barcode scanner is installed on the inner side of the top of the first door frame, and the first infrared sensor is installed on the inner wall of one side of the first door frame.

[0007] Preferably, it also includes a second door frame, the two ends of which are respectively fixedly connected to the two strip plates of the second weighing mechanism, the second barcode scanner is installed on the inner side of the top of the second door frame, and the second infrared sensor is installed on the inner wall of one side of the second door frame.

[0008] Preferably, the first conveying mechanism or the second conveying mechanism or the third conveying mechanism comprises two side plates, a plurality of conveying rollers are rotatably connected between the two side plates, two adjacent conveying rollers are connected by a chain drive, and one of the conveying rollers is driven to rotate by a motor.

[0009] Preferably, a fixing seat is fixedly connected to a side of the side plate away from the conveying roller, an insert block is installed on the base, and a slot matching the insert block is provided on a side of the fixing seat close to the insert block, and the insert block is plugged into the slot.

[0010] Preferably, a threaded hole is provided on the plug block, and a through hole connected to the slot is provided on the fixing seat. When the plug block is inserted into the slot, the threaded hole and the through hole correspond to each other in position. A locking bolt is also included, which passes through the through hole and is threadedly connected to the threaded hole.

[0011] Preferably, the screening mechanism includes a fixed plate, which is fixedly connected to a side plate of the third conveying mechanism, three cylinders are installed on the side of the fixed plate away from the conveying roller, and three push plates are provided on the side of the fixed plate close to the conveying roller, and the extended ends of the three cylinders all pass through the fixed plate and are fixedly connected to the three push plates respectively.

[0012] A method for weighing a battery cell by scanning a barcode, using the battery cell scanning a barcode weighing device described above, specifically comprises the following steps: S1. Place the battery cell to be weighed and scanned on the first conveying mechanism, with the side with the barcode facing upwards. The battery cell is conveyed to the first weighing mechanism for weighing and recording the weighing value. The battery cell continues to be conveyed and is detected by the first infrared sensor. The conveyor belt of the first weighing mechanism stops driving and the first timer starts working. At this time, the battery cell is located below the first barcode scanner, and the first barcode scanner scans the barcode on the battery cell. When the first timer reaches the set value, the first timer is reset and the conveyor belt of the first weighing mechanism continues to transmit; S2, when the first barcode scanner successfully scans the barcode, the battery cell continues to be transported, and the battery cell is transported to the second weighing mechanism for weighing and recording the weighing value 2, and then the battery cell continues to be transported to the third conveying mechanism. If the difference between the weighing value 2 and the weighing value 1 is within the error value, the battery cell is transported out from the output end of the third conveying mechanism; if the difference between the weighing value 2 and the weighing value 1 is outside the error value, the battery cell is pushed out by one of the cylinders on the third conveying mechanism; S3, when the first barcode scanner fails to scan the code, the second barcode scanner is turned on, the battery cell continues to be transported, and the battery cell is transported to the second weighing mechanism for weighing and recording the weighing value 2. When the second infrared sensor detects the battery cell, the second timer starts, the conveyor belt of the second weighing mechanism stops driving, and the second barcode scanner scans the battery cell; When the second timer reaches the set value, the second timer is reset and the conveyor belt of the second weighing mechanism continues to transmit; S4. When the second barcode scanner successfully scans the code and the difference between the second weighing value and the first weighing value is within the error value, the battery cell is transported out from the output end of the third conveying mechanism; if the second barcode scanner successfully scans the code and the difference between the second weighing value and the first weighing value is outside the error value, the battery cell is pushed out by one of the cylinders on the third conveying mechanism; if the second barcode scanner fails to scan the code and the difference between the second weighing value and the first weighing value is within the error value, the battery cell is pushed out by another cylinder on the third conveying mechanism; if the second barcode scanner fails to scan the code and the difference between the second weighing value and the first weighing value is outside the error value, the battery cell is pushed out by the last cylinder on the third conveying mechanism.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The battery cell code scanning and weighing device and method thereof saves electric energy by setting a second code scanner so that the second code scanner does not work when the first code scanner works normally. The second code scanner is started to work only after the first code scanner fails to scan the code (when a fault or system error occurs), and can continue to scan the code, thus avoiding the entire code scanning and weighing system from stopping working, and greatly improving the working efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2It is a schematic diagram of the structure when the base and the side panels are separated in the present invention.

[0016] Figure 3 It is a schematic diagram of the internal structure of the base in the present invention.

[0017] The meanings of the numbers in the figure are as follows: 10, first conveying mechanism; 11, second conveying mechanism; 12, third conveying mechanism; 13, side plate; 14, conveying roller; 20, first weighing mechanism; 21, second weighing mechanism; 22, strip plate; 23, conveyor belt; 24, presser foot; 25, base; 250, cavity; 26, weighing sensor; 30, fixing seat; 31, plug block; 32, locking bolt; 40, first door rack; 41, first barcode scanner; 42, first infrared sensor; 50, second door rack; 51, second barcode scanner; 52, second infrared sensor; 60, screening mechanism. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The present invention provides a technical solution: A battery cell scanning and weighing device, please refer to Figure 1-Figure 3 , including a first conveying mechanism 10, a first weighing mechanism 20, a second conveying mechanism 11, a second weighing mechanism 21 and a third conveying mechanism 12 which are connected in sequence.

[0020] Specifically, the output end of the first conveying mechanism 10 is connected to the input end of the first weighing mechanism 20, the output end of the first weighing mechanism 20 is connected to the input end of the second conveying mechanism 11, the output end of the second conveying mechanism 11 is connected to the input end of the third conveying mechanism 12, and the conveying direction of the battery cell is from the first conveying mechanism 10 to the third conveying mechanism 12.

[0021] In the present invention, the first conveying mechanism 10 or the second conveying mechanism 11 or the third conveying mechanism 12 includes two parallel side plates 13, and a plurality of conveying rollers 14 are rotatably connected between the two side plates 13. Two adjacent conveying rollers 14 are connected by a chain drive, and one of the conveying rollers 14 is driven to rotate by a motor.

[0022] It is worth noting that the length of the first conveying mechanism 10 is greater than that of the second conveying mechanism 11, and the motor speed on the first conveying mechanism 10 is slower than the motor speed of the second conveying mechanism 11, which can ensure that the first conveying mechanism 10 can only convey one battery cell after the second conveying mechanism 11 has conveyed more than three battery cells.

[0023] The bottom of each side plate 13 is fixedly connected with supporting legs near both ends.

[0024] The first weighing mechanism 20 and the second weighing mechanism 21 have the same structure; the first weighing mechanism 20 or the second weighing mechanism 21 comprises a base 25, two parallel strip plates 22 arranged above the base 25, two rollers are rotatably connected between the two strip plates 22, and the conveyor belt 23 is sleeved on the two rollers, one of which is driven to rotate by a motor; A cavity 250 is provided in the base 25, and weighing sensors 26 are installed at the four corners of the bottom of the inner wall of the cavity 250. The bottom of the strip plate 22 is fixedly connected with presser feet 24 at both ends. The bottom end of the presser foot 24 extends into the cavity 250 and abuts against the weighing sensor 26. The battery cell can be weighed by the weighing sensor 26.

[0025] A first barcode scanner 41 and a second barcode scanner 51 are respectively disposed above the first weighing mechanism 20 and the second weighing mechanism 21. In an initial state, the first barcode scanner 41 is in an on state and the second barcode scanner 51 is in a off state. A first infrared sensor 42 and a second infrared sensor 52 are respectively disposed on one side above the first weighing mechanism 20 and the second weighing mechanism 21. The first weighing mechanism 20 or the second weighing mechanism 21 includes a conveyor belt 23. Specifically, it also includes a first door frame 40, the two ends of which are respectively fixedly connected to the two strip plates 22 of the first weighing mechanism 20, the first barcode scanner 41 is installed on the top inner side of the first door frame 40, and the first infrared sensor 42 is installed on the inner wall of one side of the first door frame 40.

[0026] It also includes a second door frame 50, both ends of which are fixedly connected to the two strip plates 22 of the second weighing mechanism 21, a second barcode scanner 51 is installed on the top inner side of the second door frame 50, and a second infrared sensor 52 is installed on the inner wall of one side of the second door frame 50.

[0027] It also includes a first timer, a second timer and a screening mechanism arranged on one side of the third conveying mechanism 12; when the first infrared sensor 42 detects the battery cell, the signal is transmitted to the controller, and the controller controls the first timer to work. At the same time, the controller controls the motor that drives the roller to rotate on the first weighing mechanism 20 to stop working, so that the conveyor belt 23 of the first weighing mechanism 20 can stop transmitting. In this way, when the first infrared sensor 42 detects the battery cell, the battery cell can be just transported to the lower position of the first barcode scanner 41, which is convenient for the first barcode scanner 41 to scan the code, and the conveyor belt 23 of the first weighing mechanism 20 is controlled to stop transmitting, so that the first barcode scanner 41 can scan the code better.

[0028] The first barcode scanner 41 scans the battery cell. When the first timer reaches the set value (the set value is long enough for the first barcode scanner 41 to scan the barcode), a signal is transmitted to the controller. The controller controls the first timer to reset the time. At the same time, the controller controls the motor driving the roller on the first weighing mechanism 20 to continue to work, so that the conveyor belt 23 of the first weighing mechanism 20 continues to drive. Furthermore, the first timer, the second timer, the first barcode scanner 41, the second barcode scanner 51, the first infrared sensor 42, the second infrared sensor 52 and the motor driving the rotating roller to rotate are all electrically connected to the controller.

[0029] When the first barcode scanner 41 scans the barcode successfully, and the battery cell is transported to the second weighing mechanism 21 and detected by the second infrared sensor 52, the conveyor belt 23 of the second weighing mechanism 21 does not stop driving. If the difference between the weighing values ​​of the second weighing mechanism 21 and the first weighing mechanism 20 is within the error value, the weighing value of the first weighing mechanism 20 is taken as the final weighing value, and the battery cell is transported out from the end of the third conveying mechanism 12. Otherwise, the screening mechanism transports the battery cell out. When the first barcode scanner 41 fails to scan the code, the first barcode scanner 41 transmits a signal to the controller, and the controller controls the second barcode scanner 51 to turn on. When the second infrared sensor 52 detects the battery cell, the signal is transmitted to the controller, and the controller controls the second timer to work. At the same time, the controller controls the motor that drives the roller to rotate on the second weighing mechanism 21 to stop working, so that the conveyor belt 23 of the second weighing mechanism 21 stops transmitting. The second barcode scanner 51 scans the battery cell. When the second timer times to the set value, the signal is transmitted to the controller, and the controller controls the second timer to stop working and reset the second timer. At the same time, the controller controls the motor that drives the roller to rotate on the second weighing mechanism 21 to continue working, and the conveyor belt 23 of the second weighing mechanism 21 continues to transmit. If the difference in weighing values ​​between the second weighing mechanism 21 and the first weighing mechanism 20 is within the error value, and the second barcode scanner 51 scans the code successfully, the battery cell is conveyed out from the end of the third conveying mechanism 12, otherwise, the screening mechanism conveys the battery cell out.

[0030] The screening mechanism 60 includes a fixed plate, which is fixedly connected to a side plate 13 of the third conveying mechanism 12. Three cylinders are installed on the side of the fixed plate away from the conveying roller 14, and three push plates are provided on the side of the fixed plate close to the conveying roller 14. The extended ends of the three cylinders all pass through the fixed plate and are fixedly connected to the three push plates respectively; the three push plates and the three cylinders are all arranged along the length direction of the fixed plate; a cylinder close to the second door frame 50 is now defined as the first cylinder, and then the second cylinder and the third cylinder are arranged in sequence along the length direction of the fixed plate; the three push plates with the first cylinder, the second cylinder and the third cylinder are respectively the first push plate, the second push plate and the third push plate; the first cylinder, the second cylinder and the third cylinder are all electrically connected to the controller.

[0031] A fixing seat 30 is fixedly connected to the side of the side plate 13 away from the conveying roller 14, an insert block 31 is installed on the base 25, and a slot matching the insert block 31 is provided on the side of the fixing seat 30 close to the insert block 31, and the insert block 31 is plugged into the slot.

[0032] A threaded hole is provided on the plug block 31, and a through hole connected to the slot is provided on the fixing seat 30. When the plug block 31 is inserted into the slot, the threaded hole corresponds to the position of the through hole. A locking bolt 32 is also included, and the locking bolt 32 passes through the through hole and is threadedly connected to the threaded hole; it is convenient to connect the base 25 with the side plate 13, thereby facilitating the mutual connection between the first conveying mechanism 10, the first weighing mechanism 20, the second conveying mechanism 11, the second weighing mechanism 21 and the third conveying mechanism 12.

[0033] The present invention also provides a method for weighing a battery cell by scanning a barcode, which uses a battery cell scanning a barcode weighing device as described above, and specifically includes the following steps: S1. First, place the battery cell that needs to be scanned and weighed on the first conveying mechanism 10, with the side with the barcode facing upwards. The battery cell is conveyed to the first weighing mechanism 20 for weighing and recording the weighing value of one. The battery cell continues to be conveyed and is detected by the first infrared sensor 42. The conveyor belt 23 of the first weighing mechanism 20 stops driving, and the first timer starts working. At this time, the battery cell is located below the first barcode scanner 41, and the first barcode scanner 41 scans the barcode on the battery cell. When the first timer reaches the set value, the first timer is reset and the conveyor belt 23 of the first weighing mechanism 20 continues to transmit; S2, when the first barcode scanner 41 successfully scans the barcode, the battery cell continues to be transported, and the battery cell is transported to the second weighing mechanism 21 for weighing and recording the weighing value 2, and then the battery cell continues to be transported to the third conveying mechanism 12, if the difference between the weighing value 2 and the weighing value 1 is within the error value, the battery cell is transported out from the output end of the third conveying mechanism 12; if the difference between the weighing value 2 and the weighing value 1 is outside the error value, when the battery cell is transported to the position of the first cylinder on the third conveying mechanism 12, the controller controls the first cylinder to push the battery cell out, so that the battery cell is pushed out by one of the cylinders (the first cylinder) on the third conveying mechanism 12; S3, when the first barcode scanner 41 fails to scan the barcode, the second barcode scanner 51 is turned on, the battery cell continues to be transported, and the battery cell is transported to the second weighing mechanism 21 for weighing and recording the weighing value 2. When the second infrared sensor 52 detects the battery cell, the second timer starts, the conveyor belt 23 of the second weighing mechanism 21 stops driving, and the second barcode scanner 51 scans the battery cell; When the second timer reaches the set value, the second timer is reset and the conveyor belt 23 of the second weighing mechanism 21 continues to transmit; S4. When the second barcode scanner 51 scans the code successfully and the difference between the weighing value 2 and the weighing value 1 is within the error value, the battery cell is transported out from the output end of the third conveying mechanism 12; if the second barcode scanner 51 scans the code successfully and the difference between the weighing value 2 and the weighing value 1 is outside the error value, when the battery cell is transported to the position of the first cylinder on the third conveying mechanism 12, the controller controls the first cylinder to push the battery cell out, so that the battery cell is pushed out by one of the cylinders (the first cylinder) on the third conveying mechanism 12; if the second barcode scanner 51 fails to scan the code and the difference between the weighing value 2 and the weighing value 1 is outside the error value, when the battery cell is transported to the position of the first cylinder on the third conveying mechanism 12, the controller controls the first cylinder to push the battery cell out, so that the battery cell is pushed out by one of the cylinders (the first cylinder) on the third conveying mechanism 12 When the difference is within the error value, when the battery cell is transported to the position of the second cylinder on the third conveying mechanism 12, the controller controls the second cylinder to push the battery cell out, so that the battery cell is pushed out by another cylinder (the second cylinder) on the third conveying mechanism 12; if the second barcode scanner 51 fails to scan the barcode and the difference between the weighing value 2 and the weighing value 1 is outside the error value, when the battery cell is transported to the position of the third cylinder on the third conveying mechanism 12, the controller controls the third cylinder to push the battery cell out, so that the battery cell is pushed out by the last cylinder (the third cylinder) on the third conveying mechanism 12.

[0034] The battery cells can be screened and classified according to the errors in battery cell weighing or code scanning, so as to facilitate the inspection of the staff; for the battery cells that have correct code scanning but incorrect weighing, the first cylinder will screen and push out the battery cells; for the battery cells that have incorrect code scanning but correct weighing, the second cylinder will screen and push out the battery cells; for the battery cells that have incorrect code scanning but incorrect weighing, the third cylinder will screen and push out the battery cells.

[0035] The present invention is provided with a second barcode scanner 51, and the second barcode scanner 51 does not work when the first barcode scanner 41 works normally, thereby saving electric energy; after the first barcode scanner 41 fails to scan the code (when a fault or system error occurs), the second barcode scanner 51 is turned on and can continue to scan the code, thereby avoiding the entire barcode scanning and weighing system from stopping working, thereby greatly improving the practicality of the device.

[0036] The present invention is provided with a first weighing mechanism 20 and a second weighing mechanism 21. The first weighing mechanism 20 is used for normal weighing of the battery cells, and the second weighing mechanism 21 is used for test weighing to ensure the accuracy of the weighing value of the first weighing mechanism 20. By comparing the difference between the two weighing values, if it is within the error value range, it indicates that the weighing value of the first weighing mechanism 20 is accurate.

Claims

1. A battery cell scanning and weighing device, comprising a first conveying mechanism (10), a first weighing mechanism (20), a second conveying mechanism (11), a second weighing mechanism (21) and a third conveying mechanism (12) connected in sequence, characterized in that: The first weighing mechanism (20) and the second weighing mechanism (21) have the same structure; a first barcode scanner (41) and a second barcode scanner (51) are respectively provided above the first weighing mechanism (20) and the second weighing mechanism (21); the first barcode scanner (41) is in an on state and the second barcode scanner (51) is in a off state; a first infrared sensor (42) and a second infrared sensor (52) are respectively provided at one side above the first weighing mechanism (20) and the second weighing mechanism (21); the first weighing mechanism (20) comprises a conveyor belt (23); It also includes a first timer, a second timer, and a screening mechanism disposed on one side of the third conveying mechanism (12); when the first infrared sensor (42) detects the battery cell, the first timer starts working, the conveyor belt (23) of the first weighing mechanism (20) stops transmitting, and the first barcode scanner (41) scans the battery cell; when the first timer reaches a set value, the first timer is reset and the conveyor belt (23) of the first weighing mechanism (20) continues transmitting; When the first barcode scanner (41) scans the barcode successfully, the conveyor belt (23) of the second weighing mechanism (21) does not stop driving. If the difference between the weighing values ​​of the second weighing mechanism (21) and the first weighing mechanism (20) is within the error value, the battery cell is conveyed out from the end of the third conveying mechanism (12); otherwise, the screening mechanism conveys the battery cell out. When the first barcode scanner (41) fails to scan the barcode, the second barcode scanner (51) is turned on. When the second infrared sensor (52) detects the battery cell, the second timer starts working, the conveyor belt (23) of the second weighing mechanism (21) stops driving, and the second barcode scanner (51) scans the battery cell. When the second timer reaches a set value, the second timer is reset and the conveyor belt (23) of the second weighing mechanism (21) continues to drive. If the difference between the weighing values ​​of the second weighing mechanism (21) and the first weighing mechanism (20) is within the error value and the second barcode scanner (51) scans the barcode successfully, the battery cell is transported out from the end of the third transport mechanism (12). Otherwise, the screening mechanism transports the battery cell out.

2. A battery cell code scanning weighing device according to claim 1, characterized in that: The first weighing mechanism (20) or the second weighing mechanism (21) comprises a base (25), two parallel strip plates (22) arranged above the base (25), two rollers rotatably connected between the two strip plates (22), a conveyor belt (23) sleeved on the two rollers, one of the rollers being driven to rotate by a motor; a cavity (250) is provided in the base (25), weighing sensors (26) are installed at the bottom of the inner wall of the cavity (250) at four corners, and presser feet (24) are fixedly connected at both ends of the bottom of the strip plates (22), and the bottom end of the presser foot (24) extends into the cavity (250) and abuts against the weighing sensor (26).

3. A battery cell code scanning weighing device according to claim 2, characterized in that: It also includes a first door frame (40), the two ends of which are respectively fixedly connected to the two strip plates (22) of the first weighing mechanism (20), a first barcode scanner (41) is installed on the inner side of the top of the first door frame (40), and a first infrared sensor (42) is installed on the inner wall of one side of the first door frame (40).

4. A battery cell code scanning weighing device according to claim 2, characterized in that: It also includes a second door frame (50), the two ends of the second door frame (50) are respectively fixedly connected to the two strip plates (22) of the second weighing mechanism (21), the second barcode scanner (51) is installed on the inner side of the top of the second door frame (50), and the second infrared sensor (52) is installed on the inner wall of one side of the second door frame (50).

5. The battery cell code scanning weighing device according to claim 2, characterized in that: The first conveying mechanism (10) or the second conveying mechanism (11) or the third conveying mechanism (12) comprises two side plates (13), a plurality of conveying rollers (14) are rotatably connected between the two side plates (13), two adjacent conveying rollers (14) are connected by a chain drive, and one of the conveying rollers (14) is driven to rotate by a motor.

6. A battery cell code scanning weighing device according to claim 5, characterized in that: A fixed seat (30) is fixedly connected to a side of the side plate (13) away from the conveying roller (14); an insert block (31) is mounted on the base (25); a slot matching the insert block (31) is provided on a side of the fixed seat (30) close to the insert block (31); the insert block (31) is plugged into the slot.

7. A battery cell code scanning weighing device according to claim 6, characterized in that: The insert block (31) is provided with a threaded hole, and the fixing seat (30) is provided with a through hole connected to the slot. When the insert block (31) is inserted into the slot, the threaded hole and the through hole correspond to each other. The fixing seat (30) also includes a locking bolt (32) which passes through the through hole and is threadedly connected to the threaded hole.

8. The battery cell code scanning weighing device according to claim 5, characterized in that: The screening mechanism (60) comprises a fixed plate, the fixed plate being fixedly connected to a side plate (13) of the third conveying mechanism (12), three cylinders being installed on a side of the fixed plate away from the conveying roller (14), and three push plates being provided on a side of the fixed plate close to the conveying roller (14), and the extended ends of the three cylinders all pass through the fixed plate and are fixedly connected to the three push plates respectively.

9. A method for weighing a battery cell by scanning a barcode, characterized in that: The battery cell code scanning and weighing device according to any one of claims 1 to 8 is used, and specifically comprises the following steps: S1, placing the battery cell to be weighed by barcode scanning on the first conveying mechanism (10), with the side with the barcode facing upwards, and conveying the battery cell to the first weighing mechanism (20) for weighing and recording the weighing value of one. The battery cell continues to be conveyed and is detected by the first infrared sensor (42), the conveyor belt (23) of the first weighing mechanism (20) stops driving, and the first timer starts working. At this time, the battery cell is located below the first barcode scanner (41), and the first barcode scanner (41) scans the barcode on the battery cell; When the first timer reaches a set value, the first timer is reset to zero and the conveyor belt (23) of the first weighing mechanism (20) continues to transmit; S2, when the first barcode scanner (41) successfully scans the barcode, the battery cell continues to be transported, and the battery cell is transported to the second weighing mechanism (21) for weighing and recording the weighing value 2, and then the battery cell continues to be transported to the third conveying mechanism (12), and if the difference between the weighing value 2 and the weighing value 1 is within the error value, the battery cell is transported out from the output end of the third conveying mechanism (12); if the difference between the weighing value 2 and the weighing value 1 is outside the error value, the battery cell is pushed out by one of the cylinders on the third conveying mechanism (12); S3, when the first barcode scanner (41) fails to scan the barcode, the second barcode scanner (51) is turned on, the battery cell continues to be transported, and the battery cell is transported to the second weighing mechanism (21) for weighing and recording the weighing value 2. When the second infrared sensor (52) detects the battery cell, the second timer starts, the conveyor belt (23) of the second weighing mechanism (21) stops driving, and the second barcode scanner (51) scans the battery cell; When the second timer reaches a set value, the second timer is reset to zero and the conveyor belt (23) of the second weighing mechanism (21) continues to transmit; S4. When the second barcode scanner (51) scans the barcode successfully and the difference between the second weighing value and the first weighing value is within the error value, the battery cell is transported out from the output end of the third conveying mechanism (12); if the second barcode scanner (51) scans the barcode successfully and the difference between the second weighing value and the first weighing value is outside the error value, the battery cell is pushed out by one of the cylinders on the third conveying mechanism (12); if the second barcode scanner (51) scans the barcode unsuccessfully and the difference between the second weighing value and the first weighing value is within the error value, the battery cell is pushed out by another cylinder on the third conveying mechanism (12); if the second barcode scanner (51) scans the barcode unsuccessfully and the difference between the second weighing value and the first weighing value is outside the error value, the battery cell is pushed out by the last cylinder on the third conveying mechanism (12).

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