Pole lug shaping and voltage measuring mechanism after formation and capacity grading of polymer soft package battery

Abstract

The utility model discloses a tab shaping and voltage measuring mechanism after formation and capacity grading of a polymer soft package battery, which comprises a supporting bottom plate and a shaping and voltage measuring assembly, and a battery to be shaped and subjected to voltage measurement is supported and positioned on the supporting bottom plate; the shaping and voltage measuring assembly is arranged above the side of the supporting bottom plate and comprises a fixed seat, two pressing blocks and a driving part; the two pressing blocks are mounted on the fixed seat and can be respectively pressed on two tabs of the battery to shape the tabs; the driving part is mounted on the fixed seat and drives the pressing blocks to lift along the vertical direction; and the pressing block is a conductive pressing block and forms conduction when being pressed on the tab. According to the battery tab shaping device, the voltage is measured synchronously when the battery tab at the discharging position is shaped, high-voltage batteries are effectively intercepted from flowing down, high-voltage defective batteries can be picked out in time, and the problem of safety risks caused by outflow of defective products is solved.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, specifically to a mechanism for shaping the tabs and measuring the voltage of a polymer soft-pack battery after its formation and capacity measurement. Background Technology

[0002] Lithium-ion batteries have advantages such as high specific energy, high cycle life, and long storage time. Among them, lithium-ion pouch batteries are increasingly used in portable mobile devices due to their advantages such as large capacity, good safety performance, small size, and flexible size design.

[0003] Polymer soft-pack batteries are batteries that use aluminum-plastic packaging film as packaging material. They mainly include the battery cell, positive and negative electrode tabs that are electrically connected to the battery cell, and aluminum-plastic film used to encapsulate the battery cell (the aluminum-plastic film is a three-layer composite layer, from the outside to the inside, it is ON / AL / CPP (outer nylon layer / middle aluminum foil layer / inner heat-sealing layer)).

[0004] Formation and capacity testing are crucial steps in battery production, involving battery activation, performance testing, and grading, directly impacting battery performance and lifespan. In existing technologies, after the formation and capacity testing of polymer batteries, only the battery tabs are shaped at the unloading station, lacking a voltage testing step. This fails to effectively intercept distorted voltage data collected by the host computer, potentially posing safety risks if high-voltage batteries are released. Therefore, it is essential to test battery voltage simultaneously with tab shaping after formation and capacity testing to screen qualified batteries and prevent high-voltage defective products from proceeding to the next process. This invention addresses this need. Utility Model Content

[0005] In view of at least one of the above-mentioned technical problems, the purpose of this utility model is to provide a mechanism for shaping the tabs and measuring the voltage of polymer soft-pack batteries after formation and capacity testing. The mechanism can effectively prevent high-voltage batteries from flowing out to the next process.

[0006] The technical solution of this utility model is:

[0007] The purpose of this utility model is to provide a mechanism for shaping and measuring the tabs of a polymer soft-pack battery after formation and capacity testing. The mechanism includes a supporting base plate and a shaping and voltage measuring assembly. The battery to be shaped and its voltage measured is supported and positioned on the supporting base plate. The shaping and voltage measuring assembly is located on the upper side of the supporting base plate and includes a fixed seat, two pressing blocks mounted on the fixed seat and respectively pressed onto the two tabs of the battery for tab shaping, and a driving member mounted on the fixed seat and driving the pressing blocks to move vertically up and down. The pressing blocks are voltage-conducting blocks and form a conductive path when pressed onto the tabs.

[0008] Preferably, the upper surface of the support base plate has a first support surface and a second support surface at different heights. The height of the first support surface is lower than that of the second support surface. The first support surface is used to support and fix the battery body, and the second support surface is used to support and fix the battery tabs.

[0009] Preferably, the fixing base includes a horizontally arranged first fixing base and a vertically arranged second fixing base, the driving member is vertically fixed on the second fixing base and its driving end is connected to the first fixing base, and the number of pressure blocks is two and they are installed side by side at intervals on the side of the first fixing base facing the supporting base plate.

[0010] Preferably, each of the pressure blocks has at least one first connecting hole extending through its width direction, and the side of the first fixing seat connected to the pressure block has several second connecting holes arranged at intervals and extending inward. Each of the pressure blocks is fixed to the first fixing seat by fasteners that are sequentially inserted into the first connecting hole and the second connecting hole.

[0011] Preferably, a row of second connecting holes is formed on the side of the first fixing seat that is connected to the pressure block along its length.

[0012] Preferably, any of the pressure blocks is a square pressure block with its bottom surface extending horizontally outward to have an extension portion that overlaps with the bottom surface of the first fixing seat.

[0013] Preferably, a voltage test probe is provided at the top of any of the pressure blocks. The voltage test probe is connected to an analog input module via a transmission line. The analog input module is connected to a coupler module. The coupler module is connected to a host computer and transmits the processed voltage test signal to the host computer.

[0014] Preferably, a vertically oriented linear bearing is fixed on the side of the first fixed base away from the pressure block. The shaping voltage measuring assembly further includes a guide shaft with a vertically oriented axis that passes through the linear bearing. The upper end of any one of the guide shafts is fixed on a first fixed plate on the end face of the second fixed base facing the driving member, and the lower end is fixed on a horizontally arranged second fixed plate. The linear bearing slides relative to the guide shaft under the drive of the driving member.

[0015] Preferably, there are two linear bearings, which are symmetrically arranged about the centerline of the first fixed seat.

[0016] Preferably, a limiting post that protrudes upward is provided at the end of the first fixed seat away from the pressure block, and the limiting post is located between the two linear bearings;

[0017] A limiting block is also provided on the first fixing plate, which is suspended above the limiting post.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] This invention relates to a polymer soft-pack battery tab shaping and voltage measurement mechanism after formation and capacity testing. The mechanism simultaneously measures the voltage during the tab shaping process at the unloading position, effectively preventing high-voltage batteries from flowing down and promptly selecting out defective high-voltage batteries, thus solving the safety risks caused by defective products flowing out. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 The schematic diagram of the polymer soft-pack battery formation, capacity testing, tab shaping, and voltage measurement mechanism in this embodiment of the utility model omits the transmission line, analog input module, coupler module, and host computer.

[0022] Figure 2 This is a schematic diagram of the supporting base plate of the electrode tab shaping and voltage measuring mechanism after the polymer soft-pack battery is formed and sized according to an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the pressure block of the electrode tab shaping and voltage measuring mechanism after the polymer soft-pack battery is formed and sized according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the first fixed seat, bearing, and limiting post of the polymer soft-pack battery electrode tab shaping and voltage measuring mechanism after formation and capacity measurement according to an embodiment of the present invention.

[0025] The components are as follows: 10. Support base plate; 11. First support surface; 12. Second support surface; 20. Shaping voltage measuring assembly; 21. Fixing seat; 211. First fixing seat; 21110. Second connecting hole; 212. Second fixing seat; 22. Pressing block; 221. Extension; 222. First connecting hole; 223. Voltage test probe; 23. Driving component; 24. Linear bearing; 25. Guide shaft; 26. First fixing plate; 27. Second fixing plate; 28. Limiting block; 29. ​​Limiting post; 30. Battery; 31. Battery body; 32. Tab. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0027] See Figures 1 to 4 The polymer soft-pack battery tab shaping and voltage measurement mechanism according to this embodiment includes a supporting base plate 10 and a shaping and voltage measurement assembly 20. The supporting base plate 10 is a square plate used to support and position the battery 30 to be shaped and its voltage measured. The shaping and voltage measurement assembly 20 includes a fixed base 21, two pressure blocks 22, and a driving member 23. The two pressure blocks 22 are fixed side-by-side at intervals on the fixed base 21. The driving member 23 is mounted on the fixed base 21 and drives the two pressure blocks 22 to move vertically up and down to press them against the two tabs 32 of the battery 30 for tab shaping. It should be noted that the two pressure blocks 22 in this embodiment are voltage-conducting blocks 22. When the two pressure blocks 22 are pressed against the two tabs 32 of the battery 30, a circuit is formed, thereby achieving tab shaping while simultaneously performing voltage testing on the battery 30 tabs 32. In this embodiment of the present invention, the two voltage conducting blocks 22 are also connected to an analog input module (not shown). The analog input module is a conventional voltage analog-to-digital converter and data processing module. Its specific structure and working principle are not described or limited, and are not the innovation of this invention. The analog input module is used to convert the voltage data measured by the voltage test probe 223 from analog to digital and process the data to obtain the test voltage value. At the same time, the analog input module is connected to the coupler module (not shown, for example, (Huamao Auto) AU7 523E-1NL22-ECT coupler module). That is, the analog input module transmits the processed voltage signal data, i.e., the test voltage value, to the coupler module. The coupler module is then connected to the host computer (not shown), such as a conventional PLC controller. That is, the coupler module transmits the processed voltage signal data, i.e., the test voltage value, to the host computer. The host computer has built-in normal voltage data of battery 30, i.e., the set voltage value. By comparing the received test voltage value with the set voltage value, it can determine whether the voltage of battery 30 is normal. If it exceeds the set voltage value, it is judged as a defective product and needs to be removed, for example by mechanical gripper or manually, to the voltage NG material box (not shown) to prevent it from flowing to the next process. In other words, the mechanism of this utility model embodiment can perform voltage testing while shaping the tab 32, which solves the safety hazard caused by defective batteries 30 with high voltage flowing into the next process in the prior art. The structure is simple and highly practical.

[0028] Because the bottom surface of the polymer soft-pack battery 30 body (i.e., the battery pack) and the bottom surface of the tab 32 are not at the same height, the upper surface of the supporting base plate 10, i.e., the supporting surface, is not flat. Specifically, as shown... Figure 2 As shown, the upper surface of the support base plate 10 has a first support surface 11 and a second support surface 12 at different heights. The height of the first support surface 11 is lower than that of the second support surface 12 (the specific height is not limited). The first support surface 11 supports and fixes the battery body 30, and the second support surface 12 supports and fixes the electrode tabs 32 of the battery 30. The area of ​​the first support surface 11 is larger than that of the second support surface 12, but the specific area is not limited because the battery body 30 is much larger than the electrode tabs 32.

[0029] In this embodiment of the invention, the fixing base 21 consists of two parts: one part is for fixing the driving component 23, and the other part is connected to the driving end of the driving component 23 and used for fixing the pressure block 22. In this embodiment of the invention, the driving component 23 is a conventional cylinder. Specifically, the fixing base 21 includes a horizontally arranged first fixing base 211 and a vertically arranged second fixing base 212. The driving component 23 is specifically a cylinder body that is vertically fixed on the second fixing base 212, and its driving end, i.e., the piston rod of the cylinder, is connected to the first fixing base 211. The number of pressure blocks 22 is two (corresponding one-to-one with the positive and negative tabs of the battery 30) and they are installed side by side at intervals on one side of the first fixing base 211, specifically on the side facing the support base plate 10. Figure 1 or Figure 4 As shown on the front side. Optionally, the second mounting base 212 is a cross-shaped plate that can be mounted on other fixed structures.

[0030] Preferably, in order to connect the two pressure blocks 22 to the first fixed seat 211, as follows: Figure 1 , Figure 3 and Figure 4 As shown, at least one ( ) is opened on any of the pressing blocks 22. Figure 3 (Example: two) extending through its width direction, i.e. Figure 3 The first connecting hole 222 in the front-rear direction, and the first fixing seat 211 connected to the pressure block 22 have several spaced openings on the side that extend inwards, i.e. Figure 4 The second connecting hole 21110 extends rearward as shown. Any pressure block 22 is fixed to the first fixing seat 211 by fasteners (not shown) sequentially passing through the first connecting hole 222 and the second connecting hole 21110. An exemplary fastener is a bolt; correspondingly, both the first connecting hole 222 and the second connecting hole 21110 are threaded holes. The number of second connecting holes 21110 is not particularly limited, but there are at least two. For example, as shown... Figure 1 or Figure 4The image shows a row of plates spaced apart along the length of the front side of the first fixed base 211 (the exact number is not limited). The installation position of the two pressure blocks 22 can be adjusted at any time according to the width of the two tabs 32 of different soft-pack batteries 30.

[0031] For block 22, its structure is a cube-shaped structure. Specifically, as shown... Figure 3 As shown, any of the pressure blocks 22 is a square pressure block 22 with its bottom surface protruding horizontally outward to form an extension 221 for the bottom surface of the first fixing seat 211 to overlap. That is, the area of ​​the bottom surface of the pressure block 22 is larger than the area of ​​the top surface, which can increase the contact area between the pressure block 22 and the battery 30 tab 32, and at the same time facilitates installation. During installation, it is only necessary to place the extension 221 on the bottom surface of the first fixing seat 211 and then move it so that the first connecting hole 222 on the pressure block 22 corresponds to the second connecting hole 21110 on the first fixing seat 211, which is convenient for installation.

[0032] To enable voltage testing and transmission to the host computer when the clamping block 22 clamps the tab 32, a voltage test probe 223 is provided on the clamping block 22, arranged vertically. The bottom of the voltage test probe 223 is inside the clamping block 22, and the top protrudes above the clamping block 22 to facilitate connection to an analog input module via a transmission line, such as a wire or data line. The specific structure of the voltage test probe 223 is not described or limited.

[0033] Since the first fixed seat 211 and the pressure block 22 move vertically, moving downwards allows the pressure block 22 to press against the tabs 32 of the battery 30 for shaping and voltage measurement, thus shaping the tabs 32 and making the pressure block 22 and the battery 30 conductive for voltage measurement. Moving upwards disconnects the conductive connection between the pressure block 22 and the tabs 32. To ensure the straightness of the movement of the first fixed seat 211 and the pressure block 22, so that the two pressure blocks 22 can correspond one-to-one with the two tabs 32 to achieve shaping and voltage measurement, in this embodiment of the invention, the shaping and voltage measurement assembly 20 also includes a linear bearing 24 and a guide shaft 25. There are two guide shafts 25 and two linear bearings 24, with the two linear bearings 24 respectively installed on the side of the first fixed seat 211 away from the pressure block 22. Figure 1The first fixed base 211 shown is symmetrically arranged with two linear bearings 24 about the centerline of the first fixed base 211 on its rear side. The axis of each linear bearing 24 is vertical, and two guide shafts 25 are correspondingly inserted into the two linear bearings 24, meaning each guide shaft 25 is vertically arranged and movably connected to the first fixed base 211 via the linear bearings 24. The linear bearings 24 are movable relative to the guide shafts 25. That is, when the driving member 23 drives the first fixed base 211 to move, the linear bearings 24 move relative to the guide shafts 25, ensuring the straightness of the movement of the pressure block 22 and effectively protecting the first fixed base 211 and the guide shafts 25, reducing wear at their movable connection. Simultaneously, to fix the guide shafts 25, the upper and lower ends of the guide shafts 25 are fixed by a first fixing plate 26 and a second fixing plate 27, respectively. The first fixing plate 26 is fixed to the side of the second fixed base 212 facing the driving member 23, i.e., as shown... Figure 1 On the front side shown, the second fixing plate 27 is a horizontally arranged plate that can be fixed to the ground or to other horizontal structures. As an alternative embodiment, the number of linear bearing 24 and guide shaft 25 is one.

[0034] In this embodiment of the utility model, for example, such as Figure 1 As shown, the first fixing plate 26 is a U-shaped plate with a square limiting block 28 protruding outward at the recess. Simultaneously, a limiting post 29 protruding upward is provided on the first fixing seat 211 between the two linear bearings 24. The limiting post 29 and the limiting block 28 cooperate to limit the upward reset of the first fixing seat 211. As an alternative embodiment, the limiting post 29 can also be provided on the limiting block 28.

[0035] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A mechanism for shaping the tab of a polymer soft-pack battery after formation and capacity sorting and measuring voltage, characterized in that, The application relates to a battery shaping and voltage measuring device, which comprises a supporting bottom plate and a shaping and voltage measuring assembly, wherein the battery to be shaped and measured in voltage is supported and positioned on the supporting bottom plate; the shaping and voltage measuring assembly is arranged above the side of the supporting bottom plate and comprises a fixed base, two pressing blocks arranged on the fixed base and capable of being pressed on the two polar tabs of the battery respectively to shape the polar tabs, and a driving member arranged on the fixed base and capable of driving the pressing blocks to vertically ascend and descend; the pressing blocks are conductive pressing blocks and are capable of being electrically connected when being pressed on the polar tabs. 2.The mechanism for shaping tab and voltage measurement after formation and capacity distribution of the polymer soft-pack battery according to claim 1, wherein, The upper surface of the supporting bottom plate is formed with a first supporting surface and a second supporting surface at different height positions, the height of the first supporting surface is lower than that of the second supporting surface, the first supporting surface is used for supporting and fixing the body of the battery, and the second supporting surface is used for supporting and fixing the polar tabs of the battery. 3.The mechanism for shaping tab and voltage measurement after polymer pouch cell formation and component distribution according to claim 1, wherein, The fixed base comprises a horizontally arranged first fixed base and a vertically arranged second fixed base, the driving member is vertically fixed on the second fixed base and the driving end of the driving member is connected with the first fixed base, the number of the pressing blocks is two, and the two pressing blocks are arranged on the side of the first fixed base which faces the supporting bottom plate. 4.The mechanism for shaping tab and voltage measurement after polymer pouch cell formation and component distribution according to claim 3, wherein, At least one first connecting hole penetrating through the width direction of any one of the pressing blocks is formed, a plurality of second connecting holes which are arranged at intervals and inwardly recessed and extended are formed on the side of the first fixed base which is connected with the pressing blocks, and any one of the pressing blocks is fixed with the first fixed base by sequentially penetrating the first connecting hole and the second connecting hole with a fastener. 5.The polymer soft-pack battery formation and voltage measurement mechanism after component distribution and tab shaping according to claim 4, characterized in that, A row of the second connecting holes are formed on the side of the first fixed base which is connected with the pressing blocks along the length direction of the side. 6.The mechanism for shaping tab and voltage measurement after polymer pouch cell formation and component distribution according to claim 4, wherein, Any one of the pressing blocks is a square pressing block, and the bottom surface of the square pressing block outwardly horizontally protrudes and extends an extension part which is overlapped with the bottom surface of the first fixed base. 7.The mechanism for shaping tab and voltage measurement after formation and capacity distribution of the polymer soft-pack battery of claim 4, wherein, The top end of any one of the pressing blocks is provided with a voltage test probe, the voltage test probe is connected with an analog input module through a transmission line, the analog input module is connected with a coupler module, the coupler module is connected with an upper computer and transmits the processed voltage test signal to the upper computer. 8.The mechanism for shaping tab and voltage measurement after formation and capacity distribution of the polymer soft-pack battery of claim 4, wherein, The side of the first fixed base which is away from the pressing blocks is fixed with linear bearings with vertical axes, the shaping and voltage measuring assembly further comprises guide shafts with vertical axes which penetrate the linear bearings, the upper end of any one of the guide shafts is fixed on a first fixed plate on the end surface of the second fixed base which faces the driving member, and the lower end of the guide shaft is fixed on a horizontally arranged second fixed plate, and the linear bearings slide relative to the guide shafts under the driving of the driving member. 9.The mechanism for shaping tab and voltage measurement after polymer pouch cell formation and component distribution according to claim 8, wherein, The number of the linear bearings is two, and the two linear bearings are symmetrically arranged about the middle line of the first fixed base. 10.The polymer soft-pack battery formation and voltage measurement mechanism after component distribution and tab shaping according to claim 9, wherein, A limiting column which protrudes and extends upwards is further arranged on the end of the first fixed base which is away from the pressing blocks, and the limiting column is between the two linear bearings. A limiting block which is suspended above the limiting column is further arranged on the first fixed plate.

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