High-rate, high-capacity, minimalist battery sealing cover, cylindrical battery, and assembly process

Abstract

The present invention relates to a high-rate, large-capacity, minimalist battery sealing cover, a cylindrical battery, and an assembly process, comprising a cover plate, a safety valve hole provided on one side of the cover plate, the safety valve hole being sealed by a safety valve sheet, an electrode hole provided in the center of the cover plate, a pole inserted into the electrode hole, an insulating seal provided between the pole and the cover plate, the pole connected to a first electrode via a first pole tab, an insulating bracket provided below the cover plate, a relief hole provided on the insulating bracket matching the safety valve hole and the center hole, and the cover plate being fixedly connected to a second electrode through the insulating bracket. The present invention integrates the positive and negative electrodes at one end, saving structural components and simplifying the structure. The cover plate is used as an electrode, thereby increasing the overcurrent and achieving high-rate charge and discharge.

Description

Technical Field

[0001] The present invention relates to the technical field of cylindrical batteries, and in particular to a high-rate, large-capacity, minimalist battery sealing cover, a cylindrical battery, and an assembly process. Background Art

[0002] A battery is a device that converts and stores energy, converting chemical or physical energy into electrical energy through reactions. A battery is a chemical power source consisting of two electrochemically active electrodes of different compositions, one positive and one negative. These electrodes are immersed in an electrolyte that provides a conductive medium. When connected to an external carrier, they provide energy by converting the chemical energy within.

[0003] Currently, batteries of the same model have a similar structure, typically featuring tabs on both sides, with the positive and negative electrode covers being separate components. This not only requires a large number of components, but also requires complex processes and numerous molding steps. Furthermore, due to the fixed structure and volume of the battery, the battery capacity is inversely proportional to its internal structure. Therefore, when powering some high-power electrical devices, multiple batteries of the same model are required, resulting in an increased number of batteries and increased costs. To address this issue, the prior art utilizes large-capacity batteries with tabs, welded using a spot welding method for energy storage. However, this structure is only suitable for low-current discharge. High-current discharge results in a high temperature rise, which cannot guarantee the lifespan and safety of existing batteries.

[0004] Therefore, there is an urgent need to design a high-rate discharge battery with a simple structure. Summary of the Invention

[0005] To this end, the technical problem to be solved by the present invention is to overcome the defects of small battery capacity and small discharge current in the prior art, and to provide a high-rate, large-capacity, minimalist battery sealing cover, cylindrical battery and assembly process with a simple structure that can achieve high-rate charging and discharging.

[0006] To solve the above technical problems, the present invention provides a high-rate, large-capacity minimalist battery sealing cover, comprising a cover plate, a safety valve hole being provided on one side of the cover plate, the safety valve hole being sealed by a safety valve sheet, an electrode hole being provided in the center of the cover plate, a pole being passed through the electrode hole, an insulating seal being provided between the pole and the cover plate, the pole being connected to a first electrode through a first pole ear, an insulating bracket being provided under the cover plate, an avoidance hole being provided on the insulating bracket matching the safety valve hole and the center hole, and the cover plate being fixedly connected to a second electrode through the insulating bracket.

[0007] As a preferred embodiment of the present invention, the cover plate and the second electrode are fixed by laser welding.

[0008] As a preferred embodiment of the present invention, the cover plate is provided with a downwardly concave groove, the insulating bracket is provided with a connection hole matching the groove, and the bottom surface of the groove passes through the connection hole and is fixedly connected to the second electrode.

[0009] As a preferred embodiment of the present invention, the cover plate is connected to the second electrode through a second tab, the second tab is a circular ring structure, a tab step extends upward from the inner circle of the second tab, and the cover plate is fixed to the tab step.

[0010] As a preferred embodiment of the present invention, a positioning groove is provided below the cover plate around the electrode hole, and the insulating bracket is provided with a positioning protrusion corresponding to the positioning groove.

[0011] As a preferred embodiment of the present invention, the grooves are symmetrically arranged on both sides of the electrode hole.

[0012] As a preferred embodiment of the present invention, the cover plate is connected to the second electrode through a second pole ear, the side projection of the second pole ear is a Z-shaped structure, one end of the second pole ear passes through the insulating bracket and is fixedly connected to the cover plate, and the other end of the second pole ear is located below the insulating bracket.

[0013] As a preferred embodiment of the present invention, the first pole tab is an S-shaped structure, one end of the first pole tab is connected to the pole column, and the other end of the first pole tab is provided with a through hole connected to the central tube of the cylindrical battery.

[0014] A high-rate, large-capacity minimalist cylindrical battery comprises the above-mentioned battery sealing cover, as well as an outer shell and a winding core assembly, wherein an insulating gasket is provided between the winding core assembly and the bottom of the outer shell.

[0015] As a preferred embodiment of the present invention, the outer edge of the cover plate is provided with a mounting step matching the outer shell, the mounting step is placed on the upper edge of the outer shell, and the cover plate is fixed to the outer shell by welding.

[0016] The assembly process of a high-rate, large-capacity minimalist cylindrical battery includes the following steps:

[0017] After installing the insulating gasket in the housing, assemble the core assembly into the housing;

[0018] Assemble and fix the pole and insulating seal with the cover;

[0019] Installing the first tab at a corresponding position of the winding core assembly;

[0020] An insulating bracket is provided between the second electrode and the cover plate;

[0021] fixing the cover plate and the second electrode;

[0022] Fix the cover and housing and install the safety valve.

[0023] As a preferred embodiment of the present invention, the cover plate is connected to the second electrode through the second pole ear, and the second pole ear is a circular ring structure. During assembly, the second pole ear and the insulating bracket are first assembled at the corresponding positions of the core assembly and then the cover plate and the second pole ear are welded and fixed.

[0024] As a preferred embodiment of the present invention, the cover plate is connected to the second electrode through the second pole ear, and the side projection of the second pole ear is a Z-shaped structure. During assembly, the second pole ear and the cover plate are first welded and fixed, and then the insulating bracket is assembled, and then the assembled cover plate is fixed to the shell.

[0025] The above technical solution of the present invention has the following advantages over the prior art:

[0026] The battery sealing cover of the present invention integrates the positive and negative electrodes at one end, saving structural parts and simplifying the structure. The cover plate is used as an electrode, which increases the overcurrent and realizes high-rate charge and discharge.

[0027] The high-rate, large-capacity, minimalist cylindrical battery of the present invention integrates the positive and negative electrodes at one end, using the cover plate as an electrode, thereby improving the battery life and safety.

[0028] The assembly process of the high-rate, large-capacity minimalist cylindrical battery described in the present invention is simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings, wherein

[0030] Figure 1 is a schematic diagram of a sealing cover according to an embodiment of the present invention;

[0031] Figure 2 This is an explosion diagram of Example 1 of the present invention;

[0032] Figure 3 is a cross-sectional view of an embodiment of the present invention;

[0033] Figure 4 This is an explosion diagram of the second embodiment of the present invention;

[0034] Figure 5 is a cross-sectional view of a second embodiment of the present invention;

[0035] Figure 6 Schematic diagram of the first tab of the present invention;

[0036] Figure 7 is a cross-sectional view of a cylindrical battery embodiment of the present invention;

[0037] Figure 8 This is a cross-sectional view of a second embodiment of a cylindrical battery according to the present invention.

[0038] Explanation of the reference numerals in the specification: 100, sealing cover; 110, cover plate; 111, safety valve hole; 112, safety valve plate; 113, electrode hole; 114, groove; 115, positioning groove; 116, mounting step; 120, pole; 130, insulating seal; 140, insulating bracket; 141, avoidance hole; 142, connecting hole; 143, positioning protrusion; 150, first pole ear; 151, through hole; 160, second pole ear; 161, pole ear step; 200, shell; 300, core assembly; 400, insulating gasket. DETAILED DESCRIPTION

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0040] Reference Figure 1 and Figure 2The figure shows a schematic diagram of an embodiment of a high-rate, large-capacity, minimalist battery sealing cover 100 of the present invention. The battery sealing cover 100 of the present invention includes a cover plate 110, which seals a cylindrical battery. To ensure the safety of the battery during charging and discharging, a safety valve hole 111 is provided on one side of the cover plate 110, and the safety valve hole 111 is sealed by a safety valve sheet 112. In this embodiment, an electrode hole 113 is provided at the center of the cover plate 110, and a pole 120 is passed through the electrode hole 113. An insulating seal 130 is provided between the pole 120 and the cover plate 110. The pole 120 is connected to the first electrode through a first pole ear 150. Since the pole 120 is a slender structure, it is not convenient to directly fix the pole 120 and the first electrode. Therefore, in this embodiment, a first pole ear 150 is provided to lead out the first electrode. An insulating bracket 140 is provided below the cover plate 110. The insulating bracket 140 is provided with an avoidance hole 141 that matches the safety valve hole 111 and the center hole. The cover plate 110 is fixedly connected to the second electrode through the insulating bracket 140. That is, the positive and negative poles of the cylindrical battery are arranged at the same end of the cylindrical battery. The insulating seal 130 separates the pole 120 from the cover plate 110 and the first pole tab 150 from the second pole tab 160 to prevent short circuit. The cover plate 110 leads out the other electrode of the cylindrical battery and acts as an electrode of the cylindrical battery. The cover plate 110 can have a larger contact area with the second electrode, so that the overcurrent value for large-capacity cylindrical batteries can be designed to be larger, preventing overcurrent and taking into account the capacity and safety of the battery. Similarly, since the positive and negative electrodes of the cylindrical battery are changed from being arranged at both ends to being concentrated at one end, the structural components originally arranged at both ends of the cylindrical battery should also be concentrated at one end. In this embodiment, the cover plate 110 serves as an electrode of the cylindrical battery, that is, there is no need to increase the number of structural components on the basis of the original cylindrical battery sealing cover 100 structure. The number of structural components is greatly reduced, which greatly simplifies the structure of the cylindrical battery sealing cover 100.

[0041] Specifically, because the cover plate 110 has a larger contact area with the second electrode, the cover plate 110 and the second electrode are fixed together by welding. To avoid excessive welding heat input that could affect the quality of the cylindrical battery, in this embodiment, the cover plate 110 and the second electrode are fixed together by laser welding. Laser welding is more robust and has a lower resistance after welding, ensuring that the connection between the cover plate 110 and the second electrode can withstand higher current values and achieve high-rate charge and discharge.

[0042] Reference Figure 2 and Figure 3The figure shows the first embodiment of the present invention. In this embodiment, since the distance between the cover plate 110 and the second electrode is relatively large, the cover plate 110 is connected to the second electrode via a second electrode tab 160. The second electrode tab 160 is an annular structure, so that the contact area between the second electrode tab 160, the cover plate 110 and the core assembly 300 is sufficiently large. Since the projection of the annular second electrode tab 160 covers the entire insulating support 140, the cover plate 110 is provided with a downwardly recessed groove 114 to connect the cover plate 110 and the second electrode tab 160. The insulating support 140 is provided with a connecting hole 142 that matches the groove 114. The bottom surface of the groove 114 passes through the connecting hole 142 and is fixedly connected to the second electrode tab 160. Because the distance between the cover plate 110 and the second tab 160 is relatively large, and the cover plate 110 is relatively thin, to prevent the groove 114 on the cover plate 110 from sinking too far downward, thereby weakening the groove 114, a tab step 161 extends upward from the inner periphery of the second tab 160. The groove 114 is secured to the tab step 161. Because the tab step 161 extends upward to a certain height, the depth of the depression of the groove 114 can be reduced, thus ensuring the strength of the cover plate 110. To facilitate assembly and ensure that the groove 114 and the insulating support 140 align, positioning grooves are provided on the underside of the cover plate 110, corresponding to the electrode holes 113. The insulating support 140 is provided with positioning protrusions 143 corresponding to the positioning grooves. In this embodiment, the positioning grooves are square grooves, and the positioning protrusions 143 are matching square protrusions. This prevents relative rotation between the cover plate 110 and the insulating support 140, ensuring that the groove 114 aligns with the connection hole 142 on the insulating support 140. Furthermore, in order to increase the contact area between the second electrode tab 160 and the cover plate 110 without affecting the strength of the cover plate 110 , the grooves 114 are symmetrically arranged on both sides of the electrode hole 113 .

[0043] Reference Figure 4 and Figure 5 The figure shows a second embodiment of the present invention. In this embodiment, the cover plate 110 is flat. Since there is a certain distance between the cover plate and the second electrode, the cover plate 110 is connected to the second electrode via a second electrode tab 160. The second electrode tab 160 has a Z-shaped structure when projected from the side and a fan-shaped structure when projected from above. Therefore, one end of the second electrode tab 160 is higher than the other end, which facilitates the fixed connection between one end of the second electrode tab 160 and the cover plate 110 through the insulating bracket 140. The other end of the second electrode tab 160 is located below the insulating bracket 140. The insulating bracket 140 supports the two ends of the second electrode tab 160, ensuring that the second electrode tab 160 contacts the cover plate 110 and the core assembly 300 respectively.

[0044] Reference Figure 6As shown, to ensure the connection between the first tab 150, the electrode 120, and the winding core assembly 300, the first tab 150 has an S-shaped structure, so that the first tab 150 has elasticity along the axial direction of the cylindrical battery. When one end of the first tab 150 is connected to the electrode 120, the other end of the first tab 150 abuts the winding core assembly 300 of the cylindrical battery, and the first tab 150 can be tightly connected to the electrode 120 and the winding core assembly 300. To prevent the first tab 150 from blocking the central tube of the cylindrical battery, the first tab 150 is provided with a through hole 151 that communicates with the central tube of the cylindrical battery.

[0045] Reference Figure 7 and Figure 8 The figure shows schematic diagrams of the first and second embodiments of the high-rate, large-capacity minimalist cylindrical battery of the present invention. The cylindrical battery of the present invention includes the above-mentioned battery sealing cover 100, as well as the outer shell 200 and the core assembly 300. An insulating gasket 400 is provided between the core assembly 300 and the bottom of the outer shell 200 to prevent short circuit. Furthermore, in order to facilitate the connection between the cover plate 110 and the outer shell 200, the outer edge of the cover plate 110 is provided with a mounting step 115 positioning groove matching the outer shell 200; 116, the mounting step 115 positioning groove; 116 is placed on the upper edge of the outer shell 200, and the cover plate 110 is welded and fixed to the outer shell 200. In the first and second embodiments of the present invention, the second pole ear 160 is annular and Z-shaped, respectively.

[0046] The present invention also discloses an assembly process for a high-rate, large-capacity, minimalist cylindrical battery. The assembly of the cylindrical battery comprises the following steps:

[0047] After the insulating gasket 400 is installed in the housing 200 , the core assembly 300 is assembled into the housing 200 , so that the insulating gasket 400 is located between the core assembly 300 and the housing 200 .

[0048] The pole 120 and the insulating seal 130 are assembled and fixed to the cover 110 ; the insulating seal 130 seals the electrode hole 113 while ensuring the stability of the connection between the pole 120 and the cover 110 .

[0049] The first electrode tab 150 is installed at the corresponding position of the winding core assembly 300 ; the electrode of the winding core assembly 300 is led out to facilitate connection with the electrode column 120 .

[0050] The cover plate 110 is assembled, and the insulating bracket 140 is disposed between the second electrode and the cover plate 110 .

[0051] The cover plate 110 and the second electrode are fixed; specifically, the cover plate 110 and the second electrode are fixed by laser welding.

[0052] The connection between the cover plate 110 and the electrode is completed, and then the cover plate 110 and the housing 200 are fixed, and finally the safety valve is installed.

[0053] In embodiment 1 of the present invention, since there is a certain distance between the cover plate 110 and the second electrode, the cover plate 110 is connected to the second electrode through the second pole ear 160. The second pole ear 160 is a circular ring structure. Although the relative positions of the insulating bracket and the cover plate 110 are determined, the position between the cover plate 110 and the second pole ear 160 is limited by the outer shell 200. Therefore, the second pole ear 160 and the insulating bracket 140 are first assembled at the corresponding positions of the core assembly 300 and then the cover plate 110 and the second pole ear 160 are welded and fixed.

[0054] In the second embodiment of the present invention, since there is a certain distance between the cover plate 110 and the second electrode, the cover plate 110 is connected to the second electrode through the second pole ear 160. The side projection of the second pole ear 160 is a Z-shaped structure. The connection position between the second pole ear 160 and the cover plate 110 is not particularly limited, and the second pole ear 160 is open, which is convenient for installation between the insulation. Therefore, in this embodiment, the second pole ear 160 is first welded and fixed to the cover plate 110, and then the insulation is assembled, and then the assembled cover plate 110 is fixed to the shell 200.

[0055] In the present invention, the positive and negative electrodes of the cylindrical battery are on the same side, and the cover plate 110 is designed as one of the external conductive electrodes, which increases the contact area between the tab and other structural parts and improves the flow rate, thereby avoiding temperature rise-related problems during high-rate charging and discharging of the battery and improving the battery life and safety.

[0056] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. High rate and large capacity minimalist battery sealing cover, characterized by: The battery comprises a cover plate, a safety valve hole is provided on one side of the cover plate, the safety valve hole is sealed by a safety valve sheet, an electrode hole is provided in the center of the cover plate, a pole is passed through the electrode hole, an insulating seal is provided between the pole and the cover plate, the pole is connected to the first electrode through a first pole tab, an insulating bracket is provided below the cover plate, the insulating bracket is provided with an avoidance hole matching the safety valve hole and the center hole, the cover plate is fixedly connected to the second electrode through the insulating bracket, the first electrode and the second electrode are provided at the same end of the cylindrical battery, the cover plate is connected to the second electrode through the second pole tab, and the first pole tab is separated from the second pole tab; The cover plate is provided with a downwardly concave groove, the insulating bracket is provided with a connection hole matching the groove, the bottom surface of the groove passes through the connection hole and is fixedly connected to the second electrode, the second tab is a circular ring structure, the inner ring of the second tab extends upward with a tab step, and the cover plate is fixed to the tab step; The first pole tab is an S-shaped structure, one end of the first pole tab is connected to the pole column, and the other end of the first pole tab is provided with a through hole connected to the central tube of the cylindrical battery.

2. The high-rate, large-capacity, minimalist battery sealing cover according to claim 1, characterized in that: The cover plate and the second electrode are fixed by laser welding.

3. The high-rate, large-capacity, minimalist battery sealing cover according to claim 1, characterized in that: A positioning groove is provided below the cover plate and around the electrode hole, and the insulating bracket is provided with a positioning protrusion corresponding to the positioning groove.

4. The high-rate, large-capacity, minimalist battery sealing cover according to claim 1, characterized in that: The grooves are symmetrically arranged on both sides of the electrode hole.

5. High rate, large capacity, minimalist cylindrical battery, characterized by: The battery comprises a battery sealing cover as claimed in any one of claims 1 to 4, and an outer shell and a winding core assembly, wherein an insulating gasket is provided between the winding core assembly and the bottom of the outer shell.

6. The high-rate, high-capacity, minimalist cylindrical battery according to claim 5, characterized in that: The outer edge of the cover plate is provided with a mounting step matching the shell, the mounting step is placed on the upper edge of the shell, and the cover plate is fixed to the shell by welding.

7. The assembly process of high-rate, large-capacity minimalist cylindrical batteries is characterized by: Assembling the cylindrical battery according to any one of claims 5-6 comprises the following steps: After installing the insulating gasket in the housing, assemble the core assembly into the housing; Assemble and fix the pole and insulating seal with the cover; Installing the first tab at a corresponding position of the winding core assembly; An insulating bracket is provided between the second electrode and the cover plate; fixing the cover plate and the second electrode; Fix the cover and housing and install the safety valve.

8. The assembly process of the high-rate, large-capacity minimalist cylindrical battery according to claim 7, characterized in that: The cover plate is connected to the second electrode through the second pole ear. The second pole ear is a circular ring structure. During assembly, the second pole ear and the insulating bracket are first assembled at the corresponding positions of the core assembly, and then the cover plate and the second pole ear are welded and fixed.

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