High-magnification aluminum shell cylindrical battery and assembly method

Abstract

The invention discloses a high-magnification aluminum shell cylindrical battery and an assembly method, and relates to the technical field of new energy cylindrical batteries, the high-magnification aluminum shell cylindrical battery comprises a shell, and the aluminum shell cylindrical battery also comprises a cathode end cover plate, an integrated sealing cover plate, a cathode current collecting disc, a cathode conductive handle, a central liquid injection hole, an anti-explosion valve, an anode current collecting disc and a roll core; preferably, the bottom of the shell is a thinned area with the center phi of 6-10 mm, and the middle of the positive collector plate is a solid circular area with the diameter phi of 6 mm. The battery is a cylindrical battery. Due to the design of the through hole of the negative pole column, liquid can be injected from the center in the manufacturing process, the manufacturing yield and efficiency are improved, and the electrolyte permeation effect can be effectively improved; the integrated design of the conductive handle, the negative collector plate and the cover plate effectively reduces the manufacturing procedures and improves the yield, and the hole design of the conductive handle can effectively reduce the liquid injection infiltration time; and the penetration welding yield of the positive electrode end can be greatly improved by thinning the bottom of the positive electrode end shell.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy cylindrical batteries, and in particular to a high-rate aluminum shell cylindrical battery and an assembly method thereof. Background Art

[0002] In the prior art, large cylindrical batteries are used to improve rate performance, process efficiency and reduce costs. Currently, eccentric injection holes are mostly used in the market, so the process needs to be positioned and rotated, the battery manufacturing efficiency is low and it is easy to produce defects, and the subsequent battery injection will have poor penetration effect and other defects; some solutions have central pole through holes for injection, but the collector plate and the injection hole need to be welded and connected, and an extra welding process will also bring a higher defect rate; therefore, the existing large cylindrical battery structure design has the problems of high cost, poor injection penetration effect, low process efficiency and low yield; for this reason, this application proposes a high-rate aluminum shell cylindrical battery and assembly method to solve the above problems. Summary of the invention

[0003] The purpose of the present application is to provide a high-rate aluminum shell cylindrical battery and an assembly method to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solution: a high-rate aluminum shell cylindrical battery, comprising a shell, the aluminum shell cylindrical battery also comprising: Negative terminal cover, integrated sealing cover, negative current collecting plate, negative conductive handle, central liquid injection hole, explosion-proof valve, positive current collecting plate and winding core; Preferably, the bottom of the shell is a thinned area with a center of φ6-10mm, and the middle of the positive electrode collector is a solid circular area of ​​φ6mm.

[0005] Preferably, the battery is a cylindrical battery.

[0006] Preferably, the center of the negative terminal cover is set as a φ6mm through hole.

[0007] Preferably, the negative electrode conductive handle is provided with an opening.

[0008] The present invention also proposes a method for assembling a high-rate aluminum shell cylindrical battery, comprising the following steps: S1: Laser welding of positive electrode collector and winding core; S2: Laser welding of the negative electrode current collector and the negative electrode ear end face of the winding core; S3: The welded coil core is put into the shell, and laser penetration welding is performed on the thinned area at the bottom of the positive electrode shell; S4: After the negative electrode conductive handle is folded twice, the cover plate is closed and connected to the shell; S5: perform laser peripheral welding to seal the gap between the cover plate and the shell; S6: When injecting liquid, the negative electrode pole through-hole is used as the injection hole for central injection. There is an opening design in the middle of the conductive handle connected to the cover. After folding, the negative electrode conductive handle opening, the center hole of the winding core, and the pole through-hole are concentric. The electrolyte can enter the battery cell smoothly and quickly, with better penetration effect.

[0009] The beneficial effects of the present invention are: 1. The negative electrode through-hole design can achieve center injection during the process, improve the process yield and efficiency, and can effectively improve the electrolyte penetration effect; 2. The integrated design of the conductive handle, negative electrode current collector and cover effectively reduces the manufacturing process and improves the yield. The conductive handle opening design can effectively reduce the injection and infiltration time. 3. Thinning the bottom of the positive terminal shell can greatly improve the positive terminal penetration welding yield; BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a structural front view of an embodiment of the present application; Figure 2 This is a schematic diagram of the positive terminal structure of an embodiment of the present application; Figure 3 This is a schematic diagram of the negative terminal structure of an embodiment of the present application; Figure 4 It is a structural cross-sectional view of an embodiment of the present application. DETAILED DESCRIPTION

[0011] The present invention will be further explained below in conjunction with specific embodiments.

[0012] refer to Figure 1-Figure 4 In this embodiment, a high-rate aluminum shell cylindrical battery is proposed, including a shell, and the aluminum shell cylindrical battery also includes: Negative terminal cover, integrated sealing cover, negative current collecting plate, negative conductive handle, central liquid injection hole, explosion-proof valve, positive current collecting plate and winding core; In this embodiment, the bottom of the shell is a thinned area with a center of φ6-10mm, and the middle of the positive electrode current collecting disk is a solid circular area of ​​φ6mm.

[0013] In this embodiment, the battery is a cylindrical battery.

[0014] In this embodiment, a φ6 mm through hole is set at the center of the negative terminal cover.

[0015] In this embodiment, an opening is provided on the negative electrode conductive handle.

[0016] The present invention also proposes a method for assembling a high-rate aluminum shell cylindrical battery, comprising the following steps: S1: Laser welding of positive electrode collector and winding core; S2: Laser welding of the negative electrode current collector and the negative electrode ear end face of the winding core; S3: The welded coil core is put into the shell, and laser penetration welding is performed on the thinned area at the bottom of the positive electrode shell; S4: After the negative electrode conductive handle is folded twice, the cover plate is closed and connected to the shell; S5: Perform laser peripheral welding to seal the gap between the cover plate and the shell; S6: When injecting liquid, the negative electrode pole through-hole is used as the injection hole for central injection. There is an opening design in the middle of the conductive handle connected to the cover. After folding, the negative electrode conductive handle opening, the center hole of the winding core, and the pole through-hole are concentric. The electrolyte can enter the battery cell smoothly and quickly, with better penetration effect.

[0017] Working principle: The shell is a single-pass aluminum shell structure; negative terminal cover, integrated sealing cover, negative current collector, negative conductive handle, central injection hole, explosion-proof valve; the middle of the positive current collector is a solid circular area of ​​φ6mm, and the bottom of the shell is a thinned area of ​​φ6-10mm in the center for penetration welding. The positive current collector is laser welded to the core and then penetrated and welded to the bottom of the shell for electrical connection. The current collector integrated in the negative terminal cover is laser welded to the core for electrical connection, and the negative terminal cover is sealed by circumferential welding and sealing nail welding.

[0018] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-rate aluminum shell cylindrical battery, comprising a shell, characterized in that: The aluminum shell cylindrical battery also includes: Negative terminal cover, integrated sealing cover, negative current collecting plate, negative conductive handle, central liquid injection hole, explosion-proof valve, positive current collecting plate and winding core.

2. A high-rate aluminum shell cylindrical battery according to claim 1, characterized in that: The bottom of the shell is a thinned area with a center of φ6-10mm, and the middle of the positive electrode collector is a solid circular area of ​​φ6mm.

3. A high-rate aluminum shell cylindrical battery according to claim 1, characterized in that: The battery is a cylindrical battery.

4. A high-rate aluminum shell cylindrical battery according to claim 1, characterized in that: The center of the negative terminal cover is set as a φ6mm through hole.

5. A high-rate aluminum shell cylindrical battery according to claim 1, characterized in that: The negative electrode conductive handle is provided with an opening.

6. A method for assembling a high-rate aluminum shell cylindrical battery, characterized in that: The following steps are involved: S1: Laser welding of positive electrode collector and winding core; S2: Laser welding of the negative electrode current collector and the negative electrode ear end face of the winding core; S3: The welded coil core is put into the shell, and laser penetration welding is performed on the thinned area at the bottom of the positive electrode shell; S4: After the negative electrode conductive handle is folded twice, the cover plate is closed and connected to the shell; S5: Perform laser peripheral welding to seal the gap between the cover plate and the shell; S6: When injecting liquid, the negative electrode pole through-hole is used as the injection hole for central injection. There is an opening design in the middle of the conductive handle connected to the cover. After folding, the negative electrode conductive handle opening, the center hole of the winding core, and the pole through-hole are concentric. The electrolyte can enter the battery cell smoothly and quickly, with better penetration effect.

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