A method and device for shortening the exposed size of battery cell tab glue

Abstract

The present invention belongs to the technical field of batteries, and specifically relates to a method for shortening the exposed size of the tab glue of a battery cell, comprising the following steps: one, fixing the position of the battery cell and the tab of the battery cell; two, placing the heating clamp close to the edge of the tab glue of the tab and clamping the tab; three, moving the heating clamp to the top sealing edge of the battery cell; four, opening the heating clamp and rotating the heating clamp so that the heating clamp forms a preset angle with the top sealing edge, and then moving the heating clamp to the edge of the battery cell along the length direction of the top sealing edge. The present invention can shorten the exposed height of the tab glue of the battery cell, which helps to reduce the overall size of the battery cell. In addition, the present invention also discloses a device for shortening the exposed size of the tab glue of the battery cell.

Description

Technical Field

[0001] The present invention belongs to the technical field of batteries, and in particular relates to a method and device for shortening the exposed size of a battery cell tab glue. Background Art

[0002] As a new type of secondary battery, lithium-ion batteries have the advantages of high energy density and power density, high operating voltage, light weight, small size, long cycle life, good safety, and green environmental protection. They have broad application prospects in portable appliances, power tools, large-scale energy storage, electric transportation power supply, etc.

[0003] In the existing structure, after the soft-pack battery cell is top-sealed, the exposed size of the tab glue is inconsistent, and the main body size of the battery cell is large after assembly, resulting in poor consistency of battery cell assembly and low space utilization. Summary of the Invention

[0004] One of the purposes of the present invention is to address the deficiencies of the prior art and provide a method for shortening the exposed size of the battery cell tab glue, which can shorten the exposed height of the battery cell tab glue and help reduce the overall size of the battery cell.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for shortening the exposed size of a battery cell tab glue, comprising:

[0007] Step 1: Fix the position of the battery cell and the battery cell tabs;

[0008] Step 2: Place the heating clamp close to the edge of the tab glue of the tab and clamp the tab;

[0009] Step 3: Move the heating clamp to the top sealing edge of the battery cell;

[0010] Step 4: Open the heating clamp and rotate it so that it forms a preset angle with the top sealing edge. Then move the heating clamp to the edge of the battery cell along the length direction of the top sealing edge.

[0011] Preferably, in the step 2, a heating module is provided in the heating clamp, and the heating temperature of the heating module is greater than the melting temperature of the tab glue.

[0012] Preferably, in the step 2, the heating clamp is placed perpendicular to the tab so that the heating module of the heating clamp covers part of the tab glue.

[0013] Preferably, in step three, the width of the top sealing edge is 1 mm to 3 mm.

[0014] Preferably, in step 4, the distance the heating clamps are opened is greater than the thickness of the top sealing edge.

[0015] Preferably, in step four, the preset angle is less than 90°.

[0016] The second object of the present invention is to provide a device for shortening the exposed size of the battery cell tab glue, which adopts the above-mentioned method of shortening the exposed size of the battery cell tab glue, and is characterized in that it includes a carrier for accommodating the battery cell; a tab frame, which is relatively arranged on one side of the carrier and is used to clamp the tab of the battery cell; a heating clamp, which is installed on the side of the carrier corresponding to the tab; wherein the heating clamp at least partially covers the tab glue of the tab.

[0017] Preferably, the top surface of the carrier has a groove for accommodating the battery cell, and a notch for leading out the tab of the battery cell is provided on one side of the groove, and the tab holder faces the notch to clamp the tab.

[0018] Preferably, the tab frame includes a support plate and a plurality of tab clips, and the plurality of tab clips are vertically mounted on the support plate.

[0019] Preferably, it further comprises a mounting platform, and the support plate and the carrier are both mounted on the mounting platform.

[0020] The beneficial effects of the present invention are that, in step 1 of the present invention, the battery cell and the tabs of the battery cell are fixed to ensure that the tabs are not bent or tilted; in step 2, a heating clamp is used to clamp the edge of the exposed tab glue; in step 3, the heating module of the heating clamp is slowly moved, and the exposed tab glue is melted into molten glue under heating, and the molten glue is pushed by the heating clamp to accumulate to the edge of the top sealing edge; in step 4, the heating clamp is opened, and the heating module of the heating clamp is moved to form a preset angle with the top sealing edge, and the heating clamp is quickly moved along the length direction of the top sealing edge. The heating module is heated to the edge of the battery cell so that the molten glue formed by the ear glue is spread flat on the top edge, which simplifies the process of removing the ear glue, helps to increase the space utilization of the battery content, increases the volume of the battery cell, and thus improves the capacity of the battery cell. The present invention shortens the exposed size of the ear glue by heating and melting, that is, by heating and melting the ear glue of the battery cell after packaging, so that the melted ear glue is spread flat on the top edge under the action of physical pushing, which helps to reduce the exposed size of the ear glue of the battery cell, controls the consistency of the battery cell assembly PCB board process, and helps to reduce the size of the battery cell body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0022] Figure 1 Schematic diagram of step 1 of the present invention.

[0023] Figure 2 This is a schematic diagram of step 2 of the present invention.

[0024] Figure 3 Schematic diagram of step three of the present invention.

[0025] Figure 4 Schematic diagram of step four of the present invention.

[0026] Figure 5 Schematic diagram of the tab glue of the present invention before and after the size is shortened.

[0027] Figure 6 It is a structural schematic diagram of the device for shortening the exposed size of the battery tab glue of the present invention.

[0028] The description of the accompanying drawings is as follows:

[0029] 1-battery cell;

[0030] 2-Pole ear;

[0031] 3- Heating clamp;

[0032] 4-ear glue; 40-molten glue;

[0033] 5-Top edge sealing;

[0034] 6- Vehicle;

[0035] 7-pole ear rack;

[0036] 8-Installation platform;

[0037] X-length direction. DETAILED DESCRIPTION

[0038] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of the components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0039] Furthermore, the terms “first,” “second,” etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

[0040] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0041] The following is combined with Figures 1 to 6 The present invention is described in further detail, but is not intended to limit the present invention.

[0042] Methods for shortening the exposed size of the battery tab glue include:

[0043] Step 1: Fix the position of the battery cell 1 and the tab 2 of the battery cell 1;

[0044] Step 2: Place the heating clamp 3 close to the edge of the tab glue 4 of the tab 2 and clamp the tab 2;

[0045] Step 3: Move the heating clamp 3 to the top sealing edge 5 of the battery cell 1;

[0046] Step 4: Open the heating clamp 3 and rotate it so that the heating clamp 3 forms a preset angle with the top sealing edge 5 , and then move the heating clamp 3 to the edge of the battery cell 1 along the length direction X of the top sealing edge 5 .

[0047] It should be noted that: in step one, the battery cell 1 and the tab 2 of the battery cell 1 are fixed to ensure that the tab 2 is not bent or tilted; in step two, a heating clamp 3 is used to clamp the edge of the exposed tab glue 4; in step three, the heating module of the heating clamp 3 is slowly moved, and the exposed tab glue 4 is melted into molten glue 40 under the heating state, and the molten glue 40 is pushed by the heating clamp 3 to accumulate to the edge of the top sealing edge 5; in step four, the heating clamp 3 is opened, and the heating module of the heating clamp 3 is moved so that it forms a preset angle with the top sealing edge 5, and the heating module of the heating clamp 3 is quickly moved along the length direction X of the top sealing edge 5. The heat module is extended to the edge of the battery cell 1, so that the molten glue 40 formed by the ear glue 4 is spread flat on the top sealing edge 5, which simplifies the process of removing the ear glue 4, helps to increase the space utilization rate of the battery content, increases the volume of the battery cell, and thus improves the battery cell capacity. The present invention shortens the exposed size of the ear glue 4 by heating and melting, that is, by heating and melting the ear glue 4 of the battery cell 1 after packaging, the melted ear glue 4 is spread flat on the top sealing edge 5 under the action of physical pushing, which helps to reduce the exposed size of the ear glue 4 of the battery cell 1, controls the consistency of the battery cell assembly PCB board process, and helps to reduce the main body size of the battery cell 1.

[0048] In this embodiment, during the top sealing packaging process, it is necessary to ensure that there is no unsealed area on the top sealing edge 5 of the battery cell 1, and the tab 2 includes the tab metal strip and the part surrounded by the tab glue 4. The tab metal strip is exposed outside and can be clamped by the heating clamp 3 in step two.

[0049] In the method for shortening the exposed size of the tab glue of the battery cell according to the present invention, in step 2, a heating module is provided in the heating clamp 3, and the heating temperature of the heating module is greater than the melting temperature of the tab glue 4. It should be noted that the heating module ensures that the molten glue 40 formed by the tab glue 4 will not solidify and remain in a melted state, making it easy to spread the molten glue 40 on the top sealing edge 5, and there is no need to remove the molten glue 40, thereby reducing the size of the exposed tab glue and helping to simplify the process.

[0050] In the method for shortening the exposed size of the battery cell tab glue according to the present invention, in step two, the heating clamp 3 is perpendicular to the tab 2, so that the heating module of the heating clamp 3 covers part of the tab glue 4, so that the covered part of the tab glue 4 melts under heating to form a molten glue 40.

[0051] In the method for shortening the exposed size of the battery cell tab glue according to the present invention, in step 3, the width of the top seal 5 is 1 mm to 3 mm. In some embodiments, the width of the top seal 5 is 1 mm, 2 mm, or 3 mm, but the present invention is not limited thereto and the width of the top seal 5 can be adjusted according to the actual size of the battery.

[0052] In the method for shortening the exposed size of the battery cell tab glue according to the present invention, in step four, the distance that the heating clamp 3 is opened is greater than the thickness of the top sealing edge 5, so that the heating clamp 3 can be clamped on the top sealing edge 5 and can be moved on the top sealing edge 5, so that the molten glue 40 after the tab glue 4 is melted is spread flat on the top sealing edge 5.

[0053] In the method for shortening the exposed dimension of the battery cell tab glue according to the present invention, in step 4, the preset angle is less than 90°. Since the heating clamp 3 is perpendicular to the tab metal strip and parallel to the top sealing edge 5, and the tab metal strip is perpendicular to the top sealing edge 5, limiting the preset angle to less than 90° helps to prevent the tab 2 from interfering with the process of the heating clamp 3 moving and spreading the glue.

[0054] Device for shortening the exposed size of battery cell tab glue

[0055] The device of the present invention adopts the above method to shorten the exposed size of the battery cell tab glue, including a carrier 6 for accommodating the battery cell 1; a tab frame 7, which is relatively arranged on one side of the carrier 6 and is used to clamp the tab 2 of the battery cell 1; a heating clamp 3, which is installed on the side of the carrier 6 corresponding to the tab 2; wherein the heating clamp 3 at least partially covers the tab glue 4 of the tab 2.

[0056] Among them, the battery cell is placed on the carrier 6, and the position of the pole ear 2 is fixed by the pole ear frame 7, which plays the role of fixing the position of the battery cell 1 and the pole ear 2, and then the heating clamp 3 is installed on the side of the carrier 6 corresponding to the pole ear 2, and the exposed size of the pole ear glue 4 is shortened by heating and melting. That is, the pole ear glue 4 of the battery cell 1 after encapsulation is heated and melted, so that the melted pole ear glue 4 is flattened on the top sealing edge 5 under the pushing action, which helps to reduce the exposed size of the pole ear glue 4 of the battery cell 1.

[0057] In the device for shortening the exposed size of the battery cell tab glue according to the present invention, the top surface of the carrier 6 has a groove for accommodating the battery cell 1. A notch is provided on one side of the groove for leading the tab 2 of the battery cell 1. The tab frame 7 faces the notch to clamp the tab 2. Specifically, the groove serves to fix the battery cell 1, reducing the probability of displacement or shaking of the battery cell 1. The notch is increased so that the tab 2 of the battery cell 1 is exposed outside the carrier 6. The tab 2 faces the tab frame 7, making it easier to clamp the tab 2 by the tab frame 7.

[0058] In the device for shortening the exposed size of the battery cell tab glue according to the present invention, the tab frame 7 includes a support plate and a plurality of tab clips, the plurality of tab clips are vertically mounted on the support plate, and also includes a mounting platform 8, the support plate and the carrier 6 are both mounted on the mounting platform 8. The tab frame 7 includes a support plate and a plurality of tab clips, the plurality of tab clips are vertically mounted on the support plate, and can clamp each tab 2 of the battery cell 1 to ensure that the tab 2 is not bent or tilted. The mounting platform 8 serves to fix the support plate and the carrier 6, reducing the probability of displacement or shaking of the carrier 6 and the tab frame 7.

[0059] Based on the disclosure and teachings of the above description, those skilled in the art will be able to make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the above specific embodiments. Any obvious improvements, substitutions, or modifications made by those skilled in the art based on the present invention fall within the scope of protection of the present invention. In addition, although certain specific terms are used in this description, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A method for shortening the exposed size of the battery tab glue, characterized in that: include: Step 1: Fix the position of the battery cell and the battery cell tabs; Step 2: Place the heating clamp close to the edge of the tab glue of the tab, clamp the tab, and turn on the heating module in the heating clamp; Step 3: Move the heating clamp to the top sealing edge of the battery cell, heat the exposed tab glue, and melt the exposed tab glue into molten glue under the heating state. The molten glue is pushed by the heating clamp and accumulates to the edge of the top sealing edge; Step 4: Open the heating clamp and rotate it so that it forms a preset angle with the top sealing edge. Then move the heating clamp to the edge of the battery cell along the length direction of the top sealing edge.

2. The method for shortening the exposed size of the battery tab glue according to claim 1, characterized in that: In the step 2, a heating module is provided in the heating clamp, and the heating temperature of the heating module is greater than the melting temperature of the tab glue.

3. The method for shortening the exposed size of the battery tab glue as claimed in claim 2, characterized in that: In the step 2, the heating clamp is placed perpendicular to the tab so that the heating module of the heating clamp covers a portion of the tab glue.

4. The method for shortening the exposed size of the battery tab glue according to claim 1, characterized in that: In the step three, the width of the top sealing edge is 1mm-3mm.

5. The method for shortening the exposed size of the battery tab glue according to claim 1, characterized in that: In the step 4, the distance the heating clamps are opened is greater than the thickness of the top sealing edge.

6. The method for shortening the exposed size of the battery tab glue according to claim 1, characterized in that: In the step 4, the preset angle is less than 90°.

7. A device for shortening the exposed size of the battery tab glue, using the method for shortening the exposed size of the battery tab glue according to any one of claims 1 to 6, characterized in that: include: A carrier for accommodating battery cells; A tab frame, arranged on one side of the carrier, and used for clamping the tab of the battery cell; A heating clamp is installed on a side of the carrier corresponding to the tab; Wherein, the heating clamp at least partially covers the tab glue of the tab.

8. The device for shortening the exposed size of the battery tab glue as claimed in claim 7, characterized in that: The top surface of the carrier has a groove for accommodating the battery cell, and a notch for leading out the tab of the battery cell is provided on one side of the groove, and the tab frame faces the notch to clamp the tab.

9. The device for shortening the exposed size of the battery tab glue as claimed in claim 8, characterized in that: The tab frame includes a support plate and a plurality of tab clips, and the plurality of tab clips are vertically mounted on the support plate.

10. The device for shortening the exposed size of the battery tab glue as claimed in claim 9, characterized in that: It also includes a mounting platform, on which the support plate and the carrier are both mounted.

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