Coated termination adhesive of cylindrical battery

Abstract

The utility model discloses a coating termination adhesive for a cylindrical battery, which comprises spacing adhesive paper and two-dimensional code adhesive paper, the two-dimensional code adhesive paper is coated on the surface of a roll core, and the spacing adhesive paper is coated on the top and the bottom of the roll core. According to the utility model, the coating termination adhesive is coated on the cylindrical battery by adopting a full-adhesive-coating structure, so that the stability of the cylindrical battery structure is ensured, and the coating termination adhesive can play a binding role in the later detection and use process of the cylindrical battery; the shell is well prevented from being broken due to excessive expansion of the roll core, and the safety problem caused by the fact that the pole pieces are in contact with the shell wall of the shell due to excessive expansion is prevented; in addition, the two-dimensional code can facilitate later abnormity query of the cylindrical battery and interception of defective battery cells, and control over error prevention and correction and data acquisition in the production of the cylindrical battery is improved; in addition, the gummed paper can be rapidly positioned and cut through the positioning holes, the two-dimensional code cut on the two-dimensional code gummed paper is prevented, the consistency of the gummed paper in the length aspect is improved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cylindrical batteries, in particular to a coating termination glue for cylindrical batteries. Background Art

[0002] Cylindrical batteries (cylindrical power cells) are used in many fields, such as: two-wheeled vehicle / low-speed vehicle power supply, portable energy storage, starting power supply, etc., which are very different from conventional 3C digital applications. Cylindrical batteries often require cells to have a long cycle life. Cylindrical batteries are in a winding form. Cylindrical batteries usually include a winding core, a positive electrode tab and a negative electrode tab. The positive electrode tab is arranged at the top of the winding core, and the negative electrode tab is arranged at the bottom of the winding core. In addition, a shell is arranged around the cylindrical battery.

[0003] Existing cylindrical batteries have the following technical problems: during the later inspection and use of cylindrical batteries, the winding core and the pole pieces of the positive and negative ears are prone to expansion, and the original spare space in the shell may be occupied, that is, the shell may be broken due to excessive expansion of the winding core, or the pole pieces may contact the shell wall due to excessive expansion and cause safety problems, which leads to safety problems in cylindrical batteries. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a coating termination glue for a cylindrical battery, which can solve the above technical problems.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a coating termination glue for a cylindrical battery, the cylindrical battery includes a winding core, a positive electrode tab and a negative electrode tab, the positive electrode tab is arranged at the top of the winding core, and the negative electrode tab is arranged at the bottom of the winding core, the coating termination glue includes spacer tape and QR code tape, the QR code tape is coated on the surface of the winding core, and the spacer tape is coated on the top and bottom of the winding core.

[0008] Preferably, a QR code is provided on the QR code adhesive tape.

[0009] Preferably, a positioning hole is provided on the QR code adhesive tape, and the QR code and the positioning hole are spaced apart.

[0010] Preferably, the positioning hole is a square hole of 10 mm*5 mm.

[0011] Preferably, the spacer adhesive paper includes an adhesive-backed area and a non-adhesive-backed area.

[0012] Preferably, the width of the overlapping portion of the spacer tape is 10 mm.

[0013] Preferably, the width of the overlapping portion of the two-dimensional code adhesive tape is 5 mm.

[0014] Preferably, the base material of the spacer tape is PET.

[0015] Preferably, the base material of the two-dimensional code adhesive tape is PET.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the present invention provides a coating termination glue for cylindrical batteries, which has the following beneficial effects: (1) by setting a two-dimensional code adhesive tape to coat the surface of the winding core, and setting a spacer adhesive tape to coat the top and bottom of the winding core, that is, the coating termination glue of the present invention adopts a fully coated structure to coat the cylindrical battery, so that the winding core will not become loose in the subsequent process, thereby ensuring the stability of the cylindrical battery structure. The coating termination glue can play a binding role in the later inspection and use of the cylindrical battery. First, it can better avoid the shell from being broken due to excessive expansion of the winding core, and second, it can better prevent the safety problem caused by the contact of the shell wall due to excessive expansion of the pole piece, thereby improving the space utilization rate inside the shell; (2) In the production process of cylindrical power batteries, abnormalities are inevitable. How to isolate and distinguish abnormal batteries in the previous process is of vital importance to the subsequent processes. In this regard, the present invention has two A QR code is provided on the QR code tape, which is the identification code of the cylindrical battery. The QR code stores relevant information of the cylindrical battery (such as batch information, positive and negative electrode film coating information, etc.). Before the core is put into the shell, the QR code on the QR code tape can be detected by a CCD or other scanning device to correct the position of the core, and then the above QR code is associated with the QR code of the shell cover and entered into the database, that is, the information of each process of the cylindrical battery is associated with the QR code of the QR code tape and the QR code of the shell cover, which is convenient for intercepting abnormalities and searching for information data in the later stage. That is, by setting the above QR code, it is convenient to query abnormalities of cylindrical batteries in the later stage and intercept problematic cells, thereby improving the control of error prevention, error correction and data collection in the production of cylindrical batteries; (3) In addition, by setting the positioning hole, the cutting tape can be quickly positioned to prevent the QR code on the QR code tape from being cut, thereby improving the consistency of the tape length and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the first structure of a cylindrical battery coating termination glue of the utility model;

[0019] Figure 2 This is a second structural schematic diagram of a cylindrical battery coating termination glue of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the two-dimensional code adhesive tape of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the spacer tape of the utility model.

[0022] The numbers in the figure are: 1 roll core, 2 positive electrode ear, 3 negative electrode ear, 4 spacer tape, 5 QR code tape, 6 QR code, 7 positioning hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model provides a coating termination glue for a cylindrical battery. The cylindrical battery comprises a winding core 1, a positive pole tab 2 and a negative pole tab 3. The positive pole tab 2 is arranged on the top of the winding core 1, and the negative pole tab 3 is arranged on the bottom of the winding core 1. The coating termination glue of the utility model comprises a spacer adhesive paper 4 and a two-dimensional code adhesive paper 5. The two-dimensional code adhesive paper 5 is coated on the surface of the winding core 1 to form a protection for the winding core 1. The spacer adhesive paper 4 is coated on the top of the winding core 1 and the bottom of the winding core 1, that is, the spacer adhesive paper 4 is coated on the positive pole tab 2 and the negative pole tab 3 to form a protection for both the positive pole tab 2 and the negative pole tab 3. The utility model forms a fully coated structure on the cylindrical battery through the spacer adhesive paper 4 and the two-dimensional code adhesive paper 5.

[0025] Preferably, a two-dimensional code 6 is provided on the two-dimensional code adhesive tape 5 . In the production and manufacturing process of cylindrical power batteries, abnormalities are inevitable. How to isolate and distinguish abnormal batteries in the previous process is of vital importance to the subsequent processes. For this reason, a two-dimensional code 6 is provided on the two-dimensional code tape 5 of the utility model. The two-dimensional code 6 is the identification code of the cylindrical battery. The two-dimensional code 6 stores relevant information of the cylindrical battery (such as batch information of the winding core and the electrode, positive and negative electrode diaphragm coating information, winding coating data, etc.). Before the winding core is put into the shell, the two-dimensional code 6 on the two-dimensional code tape 5 can be detected by a scanning device such as a CCD to correct the position of the winding core, and then the above-mentioned two-dimensional code 6 is associated with the two-dimensional code of the shell cover and entered into the database, that is, the information of each process of the cylindrical battery is associated with the two-dimensional code 6 of the two-dimensional code tape 5 and the two-dimensional code of the shell cover, which is convenient for intercepting abnormalities and searching for information data in the later stage. That is, the two-dimensional code 6 on the two-dimensional code tape 5 plays a bridging role, which is convenient for abnormal query and interception of problematic batteries in the later stage of cylindrical batteries, and improves the control of error prevention, error correction and data collection in the production of cylindrical batteries.

[0026] Preferably, the two-dimensional code adhesive tape 5 is provided with a positioning hole 7 (Mark hole), the two-dimensional code 6 and the positioning hole 7 are arranged at intervals, and the positioning hole 7 is arranged near the cutting position of the two-dimensional code adhesive tape 5. In the process of cutting the two-dimensional code adhesive tape 5, if there is no positioning hole 7, the following problems are likely to occur: (1) poor consistency: without the positioning hole, the equipment can only cut according to the set fixed length, and the consistency of the length of the adhesive tape is poor; (2) the equipment cannot identify the position of the two-dimensional code 6 of the adhesive tape, and there is a situation that the two-dimensional code 6 is cut during cutting: the position of the two-dimensional code 6 of the adhesive tape needs to be adjusted when changing the roll (the equipment needs to avoid the position of the two-dimensional code 6 when cutting to prevent the two-dimensional code 6 from being recognized incorrectly in the subsequent process), and the overall operability is difficult; therefore, by setting one-to-one corresponding positioning holes 7 on the adhesive tape to quickly sense and locate, it is convenient for the winding equipment to recognize and cut the adhesive tape, and avoid the situation that the equipment cuts the two-dimensional code, resulting in the inability of the adhesive tape code (i.e. the above-mentioned two-dimensional code 6) in the subsequent process, thereby improving production efficiency and also raising the qualified rate of production. The positioning hole 7 may be a square hole of 10 mm*5 mm.

[0027] Specifically, the spacer adhesive tape 4 may include an adhesive backing area and a non-adhesive backing area. The spacer adhesive tape 4 may be partially attached to the two-dimensional code adhesive tape 5.

[0028] Specifically, the width of the overlapping portion of the spacer tape 4 can be 10 mm. It should be understood that the overlapping portion of the spacer tape 4 is the overlapping position of both ends of the spacer tape 4. In addition, the width of the overlapping portion of the two-dimensional code tape 5 can be 5 mm.

[0029] Preferably, the base materials of both the spacer tape 4 and the two-dimensional code tape 5 are PET, that is, polyester film is used as the base material.

[0030] Compared with the prior art, the present invention provides a coating termination adhesive for cylindrical batteries, which has the following beneficial effects: (1) by setting a two-dimensional code adhesive tape to coat the surface of the winding core, and setting a spacer adhesive tape to coat the top and bottom of the winding core, that is, the coating termination adhesive of the present invention adopts a full-coating adhesive structure to coat the cylindrical battery, so that the winding core will not become loose in the subsequent process, thereby ensuring the stability of the cylindrical battery structure. The coating termination adhesive can play a restraining role during the later inspection and use of the cylindrical battery, which can better avoid the winding core from being loosened. (1) It can prevent the pole piece from expanding too much and bursting the shell, and (2) it can better prevent the pole piece from expanding too much and contacting the shell wall, thereby improving the space utilization rate inside the shell; (3) by setting the QR code of the QR code tape, it is convenient to query abnormalities of cylindrical batteries in the later stage and intercept problematic cells, thereby improving the control of error prevention and correction and data collection in the production of cylindrical batteries; (4) in addition, by setting the positioning hole, it is possible to quickly locate the cutting tape, preventing the QR code on the QR code tape from being cut, improving the consistency of the tape length, and improving production efficiency.

[0031] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coating termination glue for a cylindrical battery, the cylindrical battery comprising a winding core, a positive electrode tab and a negative electrode tab, the positive electrode tab is arranged on the top of the winding core, and the negative electrode tab is arranged on the bottom of the winding core, characterized in that: The coated termination adhesive includes spacer adhesive tape and two-dimensional code adhesive tape. The two-dimensional code adhesive tape is coated on the surface of the core, and the spacer adhesive tape is coated on the top and the bottom of the core.

2. The coating termination glue for cylindrical batteries according to claim 1, characterized in that: The two-dimensional code adhesive tape is provided with a two-dimensional code.

3. The coating termination glue for cylindrical batteries according to claim 2, characterized in that: The two-dimensional code adhesive tape is provided with a positioning hole, and the two-dimensional code is spaced apart from the positioning hole.

4. The coating termination glue for cylindrical batteries according to claim 3, characterized in that: The positioning hole is a square hole of 10mm*5mm.

5. The coating termination glue for cylindrical batteries according to claim 1, characterized in that: The spacer adhesive paper includes an adhesive backing area and a non-adhesive backing area.

6. The coating termination glue for cylindrical batteries according to claim 1, characterized in that: The width of the overlapping portion of the spacer tape is 10 mm.

7. The coating termination glue for cylindrical batteries according to claim 1, characterized in that: The width of the overlapping part of the two-dimensional code adhesive tape is 5mm.

8. The coating termination glue for cylindrical batteries according to claim 1, characterized in that: The base material of the spacer tape is PET.

9. The coating termination glue for cylindrical batteries according to claim 1, characterized in that: The substrate of the two-dimensional code adhesive tape is PET.

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