A lithium battery that can be assembled quickly

Abstract

The invention discloses a lithium battery that can be assembled quickly, the invention relates to the technical field of lithium batteries, comprising a lower base plate, the inner side of the lower base plate is provided with a lower plastic; the bottom surface of the lower plastic is arranged into a cross-shaped spoiler structure, the top of the lower base plate is provided with an explosion-proof valve hole, the inner side of the lower base plate is fixedly connected with an explosion-proof valve plate, the inner side of the lower base plate is fixedly connected with a pole base, the top of the pole base is fixedly connected with a sealing ring, and the top of the lower base plate is fixedly connected with an explosion-proof valve sheet. The lithium battery that can be assembled quickly is designed with a spoiler structure at the plastic injection hole under the cover plate, so as to reduce the impact of liquid on the pole sheet during injection, protect the pole sheet, and prevent the pressure from being too high when the aperture of the injection port is small when injecting liquid into the injection port, thereby damaging the pole sheet and affecting the use of the lithium battery. In addition to the notches around the explosion-proof valve sheet, a "Y"-shaped notch is adopted in the middle of the valve sheet. When the battery is abused, the valve sheet can be opened in time, and the heat in the battery can be released in time.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to a lithium battery that can be assembled quickly. Background Art

[0002] Prismatic lithium batteries are a common type of lithium battery. Their outer shell is generally a rectangular parallelepiped or cube. This regular shape allows the batteries to be tightly packed when assembled into a battery pack, resulting in high space utilization and a greater overall energy density. Therefore, they are widely used in devices and scenarios requiring high space, such as electric vehicles and energy storage systems. With the rapid development of the new energy vehicle and energy storage industries, the demand for batteries is growing, and market competition is also intensifying, requiring batteries with higher energy density, longer lifespan, greater safety, and lower cost. Currently, prismatic lithium batteries on the market primarily use connectors to connect the core and top cover, and insulation is achieved by wrapping the core with insulating tape and Mylar.

[0003] Existing square lithium batteries usually need to be filled with liquid through the filling port when in use. Due to the small aperture of the filling port, excessive pressure when filling the filling port will damage the electrode and affect the use of the lithium battery. Therefore, we propose a lithium battery that can be assembled quickly. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a lithium battery that can be quickly assembled, comprising:

[0005] The winding core is provided with a tab on the top of the winding core. The tab is bent and welded to the cover plate at a 60° angle, and the tab is welded to the pole. This can save tab height and material cost.

[0006] Insulating tape (instead of Mylar) is wrapped around the battery cell, leaving a certain amount of tape above and below. Fold it over and secure it to the protective cover and bottom support. This solution simplifies the process, replaces the existing Mylar tape, saves the hot melt process, and reduces costs. A protective plate is placed on top of the insulating tape, replacing the adhesive insulation process. This cover prevents the tab from being inserted upside down, provides insulation protection, and makes the tab flatter, reducing the space occupied by the tab and increasing the energy density of the battery cell.

[0007] An assembly device for quickly assembling and sealing the tabs of the winding core;

[0008] A protective device, which is used to wrap and cover the winding core, and the inner wall of the protective device is provided with a bottom supporting sheet;

[0009] The top of the winding core is fixedly connected to the bottom of the tab, the top of the tab is fixedly connected to one side of the assembly device, the inner side of the insulating tape is fixedly connected to the outer side of the winding core, the top of the insulating tape is fixedly connected to the bottom of the protective plate, the inner side of the insulating tape is fixedly connected to the outer side of the bottom supporting piece, the top of the bottom supporting piece is fixedly connected to the bottom of the winding core, the outer side of the insulating tape is fixedly connected to the inner side of the protective device, the bottom of the inner wall of the protective device is fixedly connected to the bottom of the bottom supporting piece, and the inner wall of the protective device is fixedly connected to the outer side of the assembly device;

[0010] Wherein, the assembling device comprises:

[0011] A lower substrate, wherein a lower plastic is provided on the inner side of the lower substrate;

[0012] The bottom surface of the lower plastic is set as a cross-shaped spoiler structure, and a spoiler structure is designed at the plastic injection hole under the cover plate to reduce the impact of the liquid on the electrode during injection, protect the electrode, and prevent the electrode from being damaged by excessive pressure when the injection port is injected due to the small aperture of the injection port. Affecting the use of the lithium battery;

[0013] The inner side of the lower base plate is fixedly connected to the top of the lower plastic;

[0014] The bottom of the bottom support plate is provided with an infiltration hole, the top of the protective plate is provided with an air release hole, and the top of the protective plate is provided with a rounded square hole;

[0015] The top of the lower base plate is defined by a first explosion-proof valve hole. An explosion-proof valve plate is fixedly connected to the inner side of the lower base plate. A terminal base is fixedly connected to the inner side of the lower base plate. The tabs are welded to the terminal base, eliminating the connector used in existing battery cells and saving costs. The length of the terminal base can be adjusted based on the center-to-center distance between the tabs. A sealing ring is fixedly connected to the top of the terminal base. The top of the lower base plate is also fixedly connected to an explosion-proof valve plate. In addition to notches around the perimeter, the valve plate also features a "Y"-shaped notch in the center. This allows the valve plate to be opened promptly when the battery is abused, releasing heat within the battery. Adjusting the notch depth adjusts the opening value of the explosion-proof valve. The top of the lower base plate is fixedly connected to the upper base plate. A second explosion-proof valve hole is defined at the bottom of the upper base plate, communicating with the first explosion-proof valve hole. A protective patch is fixedly connected to the top of the upper base plate to protect the valve plate from damage by the external environment. The patch is coated with glue all around and attached to the cover plate, but in order to balance the air pressure inside the explosion-proof valve with the outside air pressure, a hole is often opened in the middle, and there is a risk of electrolyte inflow when injecting electrolyte. This solution cuts off a part of the glued part of the patch so that the patch is not completely sealed by glue, thereby realizing the function of the patch; a circular concave hole is opened on the top of the upper substrate, and the protrusions and grooves at the cover plate pole can increase the pole's anti-torsion ability. The inner wall of the sealing ring is fixedly connected to the circular pole, and the outer side of the circular pole is sleeved and fixedly connected with the upper plastic. The top of the upper substrate is opened with an injection hole, which is divided into an upper part and a lower part; the upper opening is large and cooperates with the injection nozzle to inject liquid. It has a certain inclination angle to guide the residual electrolyte. After the liquid is injected, this part is welded and sealed with the sealing aluminum nail. The lower part is a through hole, which is sealed with a sealing nail after the liquid is injected. Since the sealing nail is an interference fit, there is a 0.2-0.5mm chamfer on the upper part of the through hole, which plays a guiding role to prevent the nail from being scraped out of burrs; the inner wall of the injection hole is slidably connected with a sealing nail, and the top of the sealing nail is provided with a sealing aluminum nail, which has a gap with the injection hole, and the peripheral gap is between 0.1-0.3mm, and the gap between the bottom and the injection hole is 0.05-0.1mm. If the sealing nail is an interference fit with the injection hole, the sealing nail is easy to lift up during welding, resulting in explosion points and cracks; if the gap is too large, it affects the welding depth and width. The bottom of the sealing aluminum nail is slotted, which can provide a buffer space for the heated air and the vaporized residual electrolyte during welding, and can also prevent the sealing aluminum nail from contacting the sealing nail during welding, causing the nail to be burned; the sealing nail is divided into three parts: upper, middle and lower. The upper portion has an interference fit with the lower portion of the injection hole, and the middle portion is 0.1-0.3mm larger in diameter than the upper portion. When the pressure inside the battery increases, this portion will engage with the lower surface of the injection hole, preventing the adhesive nail from being pushed by the pressure. Due to the interference fit, the lower portion of the adhesive nail is tapered, which can serve as a guide. The outer side of the sealing aluminum nail is fixedly connected to the inner wall of the injection hole.

[0016] The bottom of the pole base is fixedly connected to the top of the pole ear, and the outer side of the upper base plate is fixedly connected to the inner wall of the protective device;

[0017] The explosion-proof valve plate is configured as an elliptical plate body with multiple strip-shaped air holes on the surface, and the explosion-proof valve piece is configured as an elliptical piece with Y-shaped notches on the surface. The bottom of the circular concave hole passes through the upper substrate and extends to the bottom of the lower substrate. The inner wall of the circular concave hole is fixedly connected to the outer side of the sealing ring, and the bottom of the injection hole passes through the upper substrate and extends to the bottom of the lower substrate.

[0018] Furthermore, the protective device includes a sleeve-type aluminum shell, the outer side of the sleeve-type aluminum shell is fixedly connected to a re-pressure mechanism, large circular holes are opened on both sides of the sleeve-type aluminum shell, the inner wall of the large circular hole is fixedly connected to an annular wave plate, the side of the annular wave plate away from the large circular hole is fixedly connected to a circular plate, a first circular groove is opened on one side of the circular plate, and a built-in circular groove is opened on the inner wall of the first circular groove, and a certain area is left for gas flow by opening the built-in circular groove between the first circular groove and the second circular hole to prevent the gap between the staggered first circular groove and the second circular hole from being too small to cause the air flow to pass through quickly and affect the heat dissipation efficiency, and a second circular hole is opened on the inner wall of the built-in circular groove, and the first circular groove, the built-in circular groove and the second circular hole are opened on the circular plate to facilitate the heat in the sleeve-type aluminum shell to flow outward and dissipate, so as to prevent the gradually increased heat inside the sleeve-type aluminum shell from being difficult to dissipate after the lithium battery is used for a long time and affecting the use efficiency of the lithium battery, and by opening the first circular groove The staggered distribution with the second circular hole on the circular plate facilitates the blocking of debris, preventing the lithium battery from exploding and directly splashing outward through the heat dissipation holes, which is difficult to intercept and causes safety hazards. The outer side of the circular plate is provided with an arc-shaped through hole connected to the built-in circular groove. By opening multiple arc-shaped through holes on the outer side of the circular plate, debris such as electrolyte accumulated in the built-in circular groove can be discharged, preventing more and more debris from gradually accumulating in the built-in circular groove and being difficult to discharge, affecting airflow and causing poor heat dissipation effect. The inner wall of the sleeve-type aluminum shell is fixedly connected to the outer side of the upper substrate, the inner wall of the sleeve-type aluminum shell is fixedly connected to the outer side of the insulating tape, and the bottom of the inner wall of the sleeve-type aluminum shell is fixedly connected to the bottom of the bottom support plate. There are multiple large circular holes, and multiple large circular holes are distributed on the outside of the sleeve-type aluminum shell. There are multiple re-pressing mechanisms, and multiple re-pressing mechanisms are respectively distributed inside the large circular holes. One side of the re-pressing mechanism is fixedly connected to the side of the circular plate close to the first circular groove.

[0019] Furthermore, the re-pressure mechanism includes an arc-shaped connecting rod, one end of the arc-shaped connecting rod is fixedly connected to the first ring plate, and one side of the first ring plate is fixedly connected to a return spring, and a return spring is arranged between the first ring plate and the second ring plate to utilize the elastic connection to cause the circular plate to drive the surrounding air to flow in the region, thereby preventing the heated gas in the sleeve-type aluminum shell from being affected by the staggered distribution of the first circular groove and the second circular hole, resulting in a low flow rate and low heat dissipation efficiency. The end of the return spring away from the first ring plate is fixedly connected to the second ring plate, and the outer side of the second ring plate is fixedly connected to an arc-shaped sliding rod, and three arc-shaped sliding rods are arranged on the outer side of the second ring plate to slide and limit the elastically connected circular plate, thereby preventing the elastically connected circular plate from being unevenly stressed and offset and tilted during intermittent movement, which affects the annular wave plate. The annular scraper is sleeved on the outer side of the arc-shaped slide rod and fixedly connected thereto, and the annular scraper is arranged on the outer side of the arc-shaped slide rod to cover the angle between the circular plate and the annular wave plate, thereby preventing the electrolyte that accidentally leaks from the first circular groove to the annular wave plate from accumulating between the circular plate and the annular wave plate and becoming difficult to handle. The annular scraper that moves with the arc-shaped slide rod scrapes and cleans the inner surface and the concave seam area of ​​the annular wave plate, thereby preventing the electrolyte that leaks from the first circular groove from continuously accumulating on the inner side and the concave seam area of ​​the annular wave plate and affecting the use of the annular wave plate. The end of the arc-shaped connecting rod away from the first circular plate is fixedly connected to the outer side of the sleeve aluminum shell, the side of the second ring plate away from the reset spring is fixedly connected to one side of the circular plate, and the end of the arc-shaped slide rod close to the second ring plate is fixedly connected to one side of the circular plate.

[0020] The present invention has the beneficial effects:

[0021] 1. The present invention designs a turbulent structure at the plastic injection hole under the cover plate to reduce the impact of the liquid on the electrode during injection, protect the electrode, and prevent the electrode from being damaged by excessive pressure when the injection port is injected due to a small aperture, affecting the use of the lithium battery. By providing a first circular groove, a built-in circular groove and a second circular hole on the circular plate, the heat in the sleeve-type aluminum shell can be easily dissipated to the outside, preventing the gradually increased heat inside the sleeve-type aluminum shell from being difficult to dissipate after the lithium battery is used for a long time, which affects the use efficiency of the lithium battery. By providing a reset spring between the first ring plate and the second ring plate, an elastic connection is used to encourage the circular plate to drive the surrounding air to flow in a region, preventing the heated gas in the sleeve-type aluminum shell from being affected by the staggered distribution of the first circular groove and the second circular hole, resulting in a low flow rate and low heat dissipation efficiency.

[0022] 2. The present invention provides an assembly device and a spoiler structure at the plastic injection hole under the cover plate to reduce the impact of the liquid on the electrode during injection, protect the electrode, and prevent the pressure from being too high when injecting liquid into the injection port due to the small aperture of the injection port, which may damage the electrode and affect the use of the lithium battery. In addition to the notches on the four sides of the explosion-proof valve plate, a "Y"-shaped notch is also used in the middle of the valve plate. When the battery is abused, the valve plate can be opened in time to release the heat in the battery in time. The opening value of the explosion-proof valve can be adjusted by adjusting the notch depth; the explosion-proof valve protection patch is to protect the explosion-proof valve plate from being damaged by the external environment. The patch is coated with glue on all sides and affixed to the cover plate, but in order to balance the air pressure inside the explosion-proof valve with the external air pressure, a hole is often opened in the middle, and there is a risk of electrolyte inflow when injecting electrolyte. This solution cuts off a part of the adhesive part of the patch so that the patch is not completely sealed by the adhesive, thereby realizing the function of the patch. The bottom of the sealing aluminum nail is grooved, which can provide a buffer space for the heated air and the vaporized residual electrolyte during welding, and can also prevent the sealing aluminum nail from contacting the sealing glue nail during welding.

[0023] 3. The present invention provides a protective device by providing a first circular groove, a built-in circular groove and a second circular hole on the circular plate to facilitate the heat in the sleeve aluminum shell to flow outward and dissipate, thereby preventing the gradually increased heat inside the sleeve aluminum shell from being difficult to dissipate after the lithium battery is used for a long time and affecting the efficiency of the lithium battery. By staggering the first circular groove and the second circular hole on the circular plate, it is convenient to block debris, thereby preventing the lithium battery from directly splashing outward through the heat dissipation holes when it explodes and causing safety hazards. By providing multiple arc through holes on the outer side of the circular plate, debris such as electrolyte accumulated in the built-in circular groove is discharged, thereby preventing the built-in circular groove from gradually accumulating more and more debris and being difficult to discharge, affecting the airflow and resulting in poor heat dissipation effect. By providing the built-in circular groove between the first circular groove and the second circular hole, a certain area is left free to facilitate gas flow, thereby preventing the gap between the staggered first circular groove and the second circular hole from being too small to cause the airflow to pass quickly and affecting the heat dissipation efficiency.

[0024] 4. The present invention provides a re-pressure mechanism, and provides a return spring between the first ring plate and the second ring plate to utilize the elastic connection to prompt the circular plate to drive the surrounding air to flow in the region, thereby preventing the heated gas in the sleeve-type aluminum shell from being affected by the staggered distribution of the first circular groove and the second circular hole, resulting in a low flow rate and low heat dissipation efficiency. Three arc sliding bars are provided on the outside of the second ring plate to slide and limit the elastically connected circular plate, thereby preventing the elastically connected circular plate from being unevenly stressed and tilted during intermittent movement, thereby causing damage to the annular wave plate. An annular scraper is provided on the outside of the arc sliding bar to cover the angle between the circular plate and the annular wave plate, thereby preventing the electrolyte that accidentally seeps from the first circular groove to the annular wave plate from accumulating between the circular plate and the annular wave plate and being difficult to handle. The annular scraper moves with the arc sliding bar to scrape and clean the inner surface and the concave seam area of ​​the annular wave plate, thereby preventing the electrolyte that seeps from the first circular groove from continuously accumulating on the inner side and the concave seam area of ​​the annular wave plate and affecting the use of the annular wave plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the lithium battery structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the lithium battery of the present invention;

[0027] Figure 3 This is a schematic diagram of the bottom structure of the assembly device of the present invention;

[0028] Figure 4 This is a schematic structural diagram of the assembly device of the present invention;

[0029] Figure 5 This is a schematic diagram of the exploded structure of the assembly device of the present invention;

[0030] Figure 6 This is a schematic diagram of the side cross-section structure of the bottom of the protective device of the present invention;

[0031] Figure 7 It is a schematic diagram of a partial side cross-section structure of the protective device of the present invention;

[0032] Figure 8 This is an enlarged structural diagram of a partial side section A of the protective device of the present invention;

[0033] Figure 9 This is a schematic structural diagram of the protective device of the present invention;

[0034] Figure 10 This is a schematic diagram of the side structure of the protective device of the present invention;

[0035] Figure: 1, winding core; 2, pole ear; 3, insulating tape; 4, protective plate; 5, assembly device; 6, protective device; 7, bottom support plate; 8, infiltration hole; 9, vent hole; 10, rounded square hole; 501, lower base plate; 502, lower plastic; 503, explosion-proof valve hole 1; 504, explosion-proof valve plate; 505, pole base; 506, sealing ring; 507, explosion-proof valve plate; 508, upper base plate; 509, explosion-proof valve hole 2; 510, explosion-proof valve protection patch; 511, circular concave hole; 512, circular pole ; 513, upper plastic; 514, injection hole; 515, sealing glue nail; 516, sealing aluminum nail; 601, sleeve aluminum shell; 602, re-pressing mechanism; 603, large circular hole; 604, annular wave plate; 605, circular plate; 606, first circular groove; 607, built-in circular groove; 608, second circular hole; 609, arc-shaped through hole; 6021, arc-shaped connecting rod; 6022, first ring plate; 6023, reset spring; 6024, second ring plate; 6025, arc-shaped slide rod; 6026, annular scraper. DETAILED DESCRIPTION

[0036] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications.

[0037] For the first example, please refer to Figure 1-Figure 5 The present invention is a lithium battery that can be quickly assembled, comprising:

[0038] A winding core 1, with a tab 2 provided on the top of the winding core 1;

[0039] Insulating tape 3, with a protective plate 4 provided on top of the insulating tape 3;

[0040] An assembly device 5, which is used to quickly assemble and seal the tab 2 of the winding core 1;

[0041] A protective device 6 is used to wrap and cover the winding core 1, and a bottom support sheet 7 is provided on the inner wall of the protective device 6;

[0042] The top of the winding core 1 is fixedly connected to the bottom of the pole lug 2, the top of the pole lug 2 is fixedly connected to one side of the assembly device 5, the inner side of the insulating tape 3 is fixedly connected to the outer side of the winding core 1, the top of the insulating tape 3 is fixedly connected to the bottom of the protective plate 4, the inner side of the insulating tape 3 is fixedly connected to the outer side of the bottom supporting piece 7, the top of the bottom supporting piece 7 is fixedly connected to the bottom of the winding core 1, the outer side of the insulating tape 3 is fixedly connected to the inner side of the protective device 6, the bottom of the inner wall of the protective device 6 is fixedly connected to the bottom of the bottom supporting piece 7, and the inner wall of the protective device 6 is fixedly connected to the outer side of the assembly device 5;

[0043] Wherein, the assembling device 5 comprises:

[0044] A lower substrate 501, with a lower plastic 502 disposed on the inner side of the lower substrate 501;

[0045] The bottom surface of the lower plastic 502 is configured as a cross-shaped spoiler structure;

[0046] The inner side of the lower substrate 501 is fixedly connected to the top of the lower plastic 502;

[0047] The bottom of the bottom support plate 7 is provided with an infiltration hole 8, the top of the protective plate 4 is provided with an air release hole 9, and the top of the protective plate 4 is provided with a rounded square hole 10;

[0048] An explosion-proof valve hole 1 503 is provided on the top of the lower base plate 501, an explosion-proof valve plate 504 is fixedly connected to the inner side of the lower base plate 501, a pole base 505 is fixedly connected to the inner side of the lower base plate 501, a sealing ring 506 is fixedly connected to the top of the pole base 505, an explosion-proof valve plate 507 is fixedly connected to the top of the lower base plate 501, an upper base plate 508 is fixedly connected to the top of the lower base plate 501, an explosion-proof valve hole 2 509 connected to the explosion-proof valve hole 1 503 is provided on the bottom of the upper base plate 508, and the upper base plate 508 is fixedly connected to the explosion-proof valve plate 507. An explosion-proof valve protection patch 510 is fixedly connected to the top. A circular recessed hole 511 is provided on the top of the upper substrate 508. A circular pole 512 is fixedly connected to the inner wall of the sealing ring 506. An upper plastic 513 is sleeved and fixedly connected to the outer side of the circular pole 512. A liquid injection hole 514 is provided on the top of the upper substrate 508. A sealing glue nail 515 is slidably connected to the inner wall of the liquid injection hole 514. A sealing aluminum nail 516 is provided on the top of the sealing glue nail 515. The outer side of the sealing aluminum nail 516 is fixedly connected to the inner wall of the liquid injection hole 514.

[0049] The bottom of the pole base 505 is fixedly connected to the top of the pole lug 2, and the outer side of the upper base plate 508 is fixedly connected to the inner wall of the protective device 6;

[0050] The explosion-proof valve plate 504 is configured as an elliptical plate with multiple strip-shaped air holes on the surface, and the explosion-proof valve plate 507 is configured as an elliptical plate with Y-shaped notches on the surface. The bottom of the circular concave hole 511 passes through the upper base plate 508 and extends to the bottom of the lower base plate 501. The inner wall of the circular concave hole 511 is fixedly connected to the outer side of the sealing ring 506. The bottom of the injection hole 514 passes through the upper base plate 508 and extends to the bottom of the lower base plate 501. When in use, after the two winding cores 1 are combined, the pole ear 2 is fixed by ultrasonic welding; then the protective plate 4 is covered, so that the pole ear 2 is inserted into the reserved rounded square hole 10 to cooperate with the winding core 1; the protective plate 4 is used to replace the glue insulation process. This cover plate prevents the tab 2 from being inserted upside down, providing insulation and protection. It also makes the tab 2 flatter, reduces the space occupied by the tab 2, and improves the energy density of the battery cell. Next, wrap insulating tape 3 (instead of Mylar) around the battery cell, leaving a certain distance between the tape at the top and bottom. After folding, it secures the tab 4 and the bottom support sheet 7. Wrap insulating tape 3 (instead of Mylar) around the battery cell, leaving a certain distance between the tape at the top and bottom. After folding, it secures the tab 4 and the bottom support sheet 7. This solution simplifies the process, replaces existing Mylar tape, saves on the hot-melt process, and reduces costs. Next, bend and weld the tab 2 to the assembly device 5 at a 60° angle, securing the tab 2 to the pole. Bend and weld the tab 2 to the cover plate at a 60° angle, securing the tab 2 to the pole. This reduces the height of the tab 2, saving material costs. Finally, the battery is inserted into the housing and laser welded to the aluminum housing. When the lithium battery is subjected to pressure or shaking during use, the protective device 6 intermittently compresses the air between the inner core 1 and the winding core 1 to dissipate heat and cool the battery. A turbulent structure is designed at the injection hole 514 of the plastic 502 under the cover to reduce the impact of liquid on the electrode during injection, thus protecting the electrode. The protrusions and grooves at the cover's pole post increase the pole's torsional resistance. The tab 2 is welded to the pole post base 505, eliminating the connector used in existing battery cells and saving costs. The pole post base 505 length can be adjusted based on the center-to-center distance between the tabs 2. The explosion-proof valve plate 507, in addition to the notches around the perimeter, also features a "Y"-shaped notch in the center. This allows the valve plate to be opened promptly in the event of battery abuse, releasing heat within the battery. Adjusting the notch depth adjusts the opening value of the explosion-proof valve. The explosion-proof valve protective patch 510 protects the explosion-proof valve plate 507 from environmental damage. The patch is coated with glue all around and attached to the cover. However, to balance the air pressure inside the explosion-proof valve with the outside air pressure, a hole is often opened in the middle, which poses a risk of electrolyte inflow during injection. This solution removes a portion of the adhesive area of ​​the patch, preventing it from being completely sealed with glue, thus achieving its full functionality. The injection hole 514 is divided into an upper and lower portion. The upper portion has a larger opening and cooperates with the injection nozzle for injection. It has a certain inclination angle to guide residual electrolyte. After injection, this portion is welded to the sealing aluminum nail 516 for sealing.The lower part is a through hole, which is sealed with the sealing glue nail 515 after the liquid is filled. Since the sealing glue nail 515 is an interference fit, there is a 0.2-0.5mm chamfer on the upper part of the through hole, which plays a guiding role and prevents the glue nail from being scratched with burrs; the sealing aluminum nail 516 is clearance-fitted with the injection hole 514, the peripheral clearance is between 0.1-0.3mm, and the gap between the bottom and the injection hole 514 is 0.05-0.1mm. If the sealing nail and the injection hole 514 are interference fit, the sealing nail is easy to lift during welding, resulting in explosion points and cracks; if the gap is too large, it affects the welding depth and width. The bottom of the sealing aluminum nail 516 is slotted, which can provide a buffer space for the heated air and the vaporized residual electrolyte during welding, and can also prevent the sealing aluminum nail 516 from contacting the sealing glue nail 515 during welding, causing the glue nail to be burned; the sealing glue nail 515 is divided into three parts: upper, middle and lower parts. The upper portion has an interference fit with the lower portion of the injection hole 514. The middle portion is 0.1-0.3mm larger in diameter than the upper portion. When the pressure inside the battery increases, this portion will engage with the lower surface of the injection hole 514, preventing the adhesive pin from being pushed by the pressure. Due to the interference fit, the lower portion of the adhesive pin has a tapered shape, which can serve as a guide.

[0051] For the second embodiment, please refer to Figures 1-10 The present invention provides a lithium battery that can be quickly assembled: the protective device 6 includes a sleeve-type aluminum shell 601, the outer side of the sleeve-type aluminum shell 601 is fixedly connected to a re-pressing mechanism 602, both sides of the sleeve-type aluminum shell 601 are provided with large circular holes 603, the inner wall of the large circular hole 603 is fixedly connected to an annular wave plate 604, the side of the annular wave plate 604 away from the large circular hole 603 is fixedly connected to a circular plate 605, one side of the circular plate 605 is provided with a first circular groove 606, the inner wall of the first circular groove 606 is provided with an inner circular groove 607, the inner wall of the inner circular groove 607 is provided with a second circular hole 608, the outer side of the circular plate 605 is provided with a An arc-shaped through hole 609 is provided that is connected to the built-in circular groove 607. The inner wall of the sleeve-type aluminum shell 601 is fixedly connected to the outer side of the upper substrate 508. The inner wall of the sleeve-type aluminum shell 601 is fixedly connected to the outer side of the insulating tape 3. The bottom of the inner wall of the sleeve-type aluminum shell 601 is fixedly connected to the bottom of the bottom supporting piece 7. A plurality of large circular holes 603 are provided, and the plurality of large circular holes 603 are distributed on the outer side of the sleeve-type aluminum shell 601. A plurality of re-pressing mechanisms 602 are provided, and the plurality of re-pressing mechanisms 602 are respectively distributed inside the large circular holes 603. One side of the re-pressing mechanism 602 is fixedly connected to the side of the circular plate 605 close to the first circular groove 606.

[0052] The re-pressing mechanism 602 includes an arc-shaped connecting rod 6021, one end of the arc-shaped connecting rod 6021 is fixedly connected to a first ring plate 6022, one side of the first ring plate 6022 is fixedly connected to a return spring 6023, one end of the return spring 6023 away from the first ring plate 6022 is fixedly connected to a second ring plate 6024, the outer side of the second ring plate 6024 is fixedly connected to an arc-shaped sliding rod 6025, the outer side of the arc-shaped sliding rod 6025 is sleeved and fixedly connected to an annular scraper 6026, the end of the arc-shaped connecting rod 6021 away from the first ring plate 6022 is fixedly connected to the outer side of the sleeve aluminum shell 601, the side of the second ring plate 6024 away from the return spring 6023 is fixedly connected to one side of the circular plate 605, and the arc-shaped sliding rod 6025 is close to the first ring plate 6022. One end of the second ring plate 6024 is fixedly connected to one side of the circular plate 605. When in use, the sleeve aluminum shell 601 is sleeved on the outside of the winding core 1 wrapped by the insulating tape 3 to protect the winding core 1. If the lithium battery is subjected to pushing pressure or shaking force during use, the re-pressing mechanism 602 will intermittently push the circular plate 605 to compress the air between the sleeve aluminum shell 601 and the winding core 1, so that the air passes through the second circular hole 608, the built-in circular groove 607 and the first circular groove 606 in turn to dissipate the heat in the sleeve aluminum shell 601. By opening the first circular groove 606, the built-in circular groove 607 and the second circular hole 608 on the circular plate 605, the heat in the sleeve aluminum shell 601 can flow outward and dissipate. By staggering the first circular groove 606 and the second circular hole 608 on the circular plate 605, it is easy to block debris. The intercepted debris will fall into the built-in circular groove 607 and be discharged to the outside through the arc-shaped through hole 609. By opening a plurality of arc-shaped through holes 609 on the outside of the circular plate 605, the electrolyte and other debris accumulated in the built-in circular groove 607 can be discharged. By opening a built-in circular groove 607 between the first circular groove 606 and the second circular hole 608, a certain area is vacated to facilitate gas flow. When the circular plate 605 moves, it drives the annular wave plate 604 on one side to expand or contract together. If the lithium battery is subjected to pushing pressure or shaking force during use, it will drive the elastically connected second ring plate 6024, the arc slide bar 6025 and The circular plate 605 moves intermittently. A return spring 6023 is provided between the first ring plate 6022 and the second ring plate 6024 to utilize an elastic connection to encourage the circular plate 605 to drive the surrounding air to flow in the region. Three arc-shaped slide bars 6025 are provided on the outside of the second ring plate 6024 to slide and limit the elastically connected circular plate 605. An annular scraper 6026 is provided on the outside of the arc-shaped slide bar 6025 to cover the angle between the circular plate 605 and the annular wave plate 604. When the arc-shaped slide bar 6025 moves, the annular scraper 6026 on the outside is driven to move together. The annular scraper 6026 that moves with the arc-shaped slide bar 6025 scrapes and cleans the inner surface and the concave seam area of ​​the annular wave plate 604.

[0053] When the present invention is in operation, after the two winding cores 1 are combined, the tabs 2 are fixed by ultrasonic welding; then the protective plate 4 is covered, and the tabs 2 are inserted into the reserved rounded square holes 10 to match the winding core 1; the protective plate 4 is used to replace the glue insulation process. The use of this cover can prevent the tabs 2 from being inserted upside down, play the role of insulation protection, and can make the tabs 2 more flat, reduce the space occupied by the tabs 2, and improve the energy density of the battery cell; then, the insulating tape 3 (instead of Mylar) is wrapped around the battery cell, and a certain distance of tape is reserved at the top and bottom, and it is folded and fixed to the protective plate 4 and the bottom support sheet 7; the insulating tape 3 (instead of Mylar) is wrapped around the battery cell, and a certain distance of tape is reserved at the top and bottom, and it is folded and fixed to the protective cover and the bottom support sheet 7. This solution simplifies the process, replacing the existing Mylar battery cell, eliminating the need for a hot melt process and reducing costs. The battery cell tab 2 is then bent and welded to the assembly device 5 at a 60° angle, securing the tab 2 to the pole. The tab 2 is then bent and welded to the cover plate at a 60° angle, securing the tab 2 to the pole. This reduces the height of the tab 2 and saves material costs. Finally, the battery is placed into the shell, and the assembly device 5 is laser welded to the aluminum shell. When the lithium battery is subjected to pressure or shaking during use, the protective device 6 intermittently compresses the air between the interior and the winding core 1 to dissipate heat and cool the battery. A turbulent structure is designed at the injection hole 514 of the plastic 502 under the cover plate to reduce the impact of liquid on the pole piece during injection and protect the pole piece. The protrusions and grooves at the pole piece of the cover plate increase the pole piece's torsional resistance. The tab 2 is welded to the pole piece base 505, eliminating the connector used in existing batteries and saving costs. The length of the pole base 505 can be adjusted according to the center distance of the pole ear 2; in addition to the notches on all sides, the explosion-proof valve plate 507 also has a "Y"-shaped notch in the middle of the valve plate. When the battery is abused, the valve plate can be opened in time to release the heat in the battery in time. Adjusting the notch depth can adjust the opening value of the explosion-proof valve; the explosion-proof valve protection patch 510 is to protect the explosion-proof valve plate 507 from being damaged by the external environment. The patch is coated with glue on all sides and attached to the cover plate, but in order to balance the air pressure inside the explosion-proof valve with the external air pressure, a hole is often opened in the middle, and there is a risk of electrolyte inflow when injecting electrolyte. This solution cuts off a part of the glued part of the patch so that the patch is not completely sealed by glue, thereby realizing the function of the patch; the injection hole 514 is divided into an upper part and a lower part; the upper opening is large and cooperates with the injection nozzle to inject liquid. It has a certain angle to guide the residual electrolyte. After the liquid is injected, this part is welded and sealed with the sealing aluminum nail 516. The lower portion is a through-hole, which, after injection, is sealed with a sealing nail 515. Because the sealing nail 515 is an interference fit, the upper portion of the through-hole has a 0.2-0.5mm chamfer to guide it and prevent burrs from being scratched. The aluminum sealing nail 516 has a clearance fit with the injection hole 514, with a clearance of 0.1-0.3mm around the perimeter and 0.05-0.1mm between the bottom and the injection hole 514. If the sealing nail and the injection hole 514 have an interference fit, the nail is prone to warping during welding, resulting in cracks and flaking. If the clearance is too large, the weld penetration depth and width are affected.The bottom of the sealing aluminum nail 516 is slotted to provide a buffer for heated air and vaporized residual electrolyte during welding, while also preventing contact between the sealing aluminum nail 516 and the sealing plastic nail 515 during welding, potentially causing burns. The sealing plastic nail 515 consists of three sections: upper, middle, and lower. The upper section has an interference fit with the lower portion of the injection hole 514, while the middle section is 0.1-0.3mm larger in diameter than the upper section. When the pressure inside the battery increases, this section will lock against the lower surface of the injection hole 514, protecting the plastic nail from the pressure. Due to the interference fit, the lower part of the glue nail is conical, which can play a guiding role. The sleeve aluminum shell 601 is sleeved on the outside of the winding core 1 wrapped by the insulating tape 3 to protect the winding core 1. If the lithium battery is subjected to pushing pressure or shaking force during use, the re-pressing mechanism 602 will intermittently push the circular plate 605 to compress the air between the sleeve aluminum shell 601 and the winding core 1, so that the air passes through the second circular hole 608, the built-in circular groove 607 and the first circular groove 606 in turn to dissipate the heat in the sleeve aluminum shell 601. The circular plate 605 is provided with a first circular groove 606, a built-in circular groove 607 and a second circular hole 608 to facilitate the heat in the sleeve-type aluminum shell 601 to flow outward and dissipate. By staggering the first circular groove 606 and the second circular hole 608 on the circular plate 605, it is easy to block debris. The intercepted debris will fall into the built-in circular groove 607 and be discharged to the outside through the arc-shaped through hole 609. By providing multiple arc-shaped through holes 609 on the outside of the circular plate 605, debris such as electrolyte accumulated in the built-in circular groove 607 can be discharged. A built-in circular groove 607 is provided between the first circular groove 606 and the second circular hole 608 to free up a certain area for gas flow. When the circular plate 605 moves, the annular wave plate 604 on one side is driven to expand or contract together. If the lithium battery is subjected to pushing pressure or shaking force during use, the elastically connected second ring plate 6024, the arc-shaped slide bar 6025 and the circular plate 605 will be driven to move intermittently. A return spring 6023 is provided between the first ring plate 6022 and the second ring plate 6024 to utilize the elastic connection to promote the circular plate 605 to move. To drive the surrounding air to flow in the area, three arc-shaped sliding bars 6025 are provided on the outside of the second ring plate 6024 to limit the sliding of the elastically connected circular plate 605. An annular scraper 6026 is provided on the outside of the arc-shaped sliding bar 6025 to cover the angle between the circular plate 605 and the annular wave plate 604. When the arc-shaped sliding bar 6025 moves, the annular scraper 6026 on the outside moves with it. The annular scraper 6026 that moves with the arc-shaped sliding bar 6025 scrapes and cleans the inner surface and the concave seam area of ​​the annular wave plate 604.

[0054] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A lithium battery that can be assembled quickly, characterized in that: include: A winding core (1), wherein a tab (2) is provided on the top of the winding core (1); An insulating tape (3), wherein a protective plate (4) is provided on the top of the insulating tape (3); An assembly device (5) is used to quickly assemble and seal the tab (2) of the winding core (1); A protective device (6) is used to provide a wrapping and covering protection to the winding core (1), and a bottom support sheet (7) is provided on the inner wall of the protective device (6); The top of the winding core (1) is fixedly connected to the bottom of the pole lug (2), the top of the pole lug (2) is fixedly connected to one side of the assembly device (5), the inner side of the insulating tape (3) is fixedly connected to the outer side of the winding core (1), the top of the insulating tape (3) is fixedly connected to the bottom of the protective plate (4), the inner side of the insulating tape (3) is fixedly connected to the outer side of the bottom support sheet (7), the top of the bottom support sheet (7) is fixedly connected to the bottom of the winding core (1), the outer side of the insulating tape (3) is fixedly connected to the inner side of the protective device (6), the bottom of the inner wall of the protective device (6) is fixedly connected to the bottom of the bottom support sheet (7), and the inner wall of the protective device (6) is fixedly connected to the outer side of the assembly device (5); Wherein, the assembling device (5) comprises: A lower substrate (501), wherein a lower plastic (502) is provided on the inner side of the lower substrate (501); The bottom surface of the lower plastic (502) is configured as a cross-shaped spoiler structure; The inner side of the lower substrate (501) is fixedly connected to the top of the lower plastic (502); The protective device (6) comprises a sleeve-type aluminum shell (601), the outer side of the sleeve-type aluminum shell (601) is fixedly connected to a re-pressing mechanism (602), both sides of the sleeve-type aluminum shell (601) are provided with large circular holes (603), the inner wall of the large circular hole (603) is fixedly connected to an annular wave plate (604), the side of the annular wave plate (604) away from the large circular hole (603) is fixedly connected to a circular plate (605), a first circular groove (606) is provided on one side of the circular plate (605), an inner wall of the first circular groove (606) is provided with an inner circular groove (607), an inner wall of the inner circular groove (607) is provided with a second circular hole (608), and an arc-shaped through hole (609) connected to the inner circular groove (607) is provided on the outer side of the circular plate (605); There are a plurality of large circular holes (603), and the plurality of large circular holes (603) are distributed outside the sleeve-type aluminum shell (601); there are a plurality of re-pressing mechanisms (602), and the plurality of re-pressing mechanisms (602) are respectively distributed inside the large circular holes (603); one side of the re-pressing mechanism (602) is fixedly connected to a side of the circular plate (605) close to the first circular groove (606); The re-pressing mechanism (602) comprises an arc-shaped connecting rod (6021), one end of the arc-shaped connecting rod (6021) is fixedly connected to a first ring plate (6022), one side of the first ring plate (6022) is fixedly connected to a return spring (6023), one end of the return spring (6023) away from the first ring plate (6022) is fixedly connected to a second ring plate (6024), the outer side of the second ring plate (6024) is fixedly connected to an arc-shaped sliding rod (6025), and the outer side of the arc-shaped sliding rod (6025) is sleeved and fixedly connected to an annular scraper (6026).

2. The quickly assembled lithium battery according to claim 1, characterized in that: The bottom of the bottom support plate (7) is provided with an infiltration hole (8), the top of the protective plate (4) is provided with an air release hole (9), and the top of the protective plate (4) is provided with a rounded square hole (10).

3. The quickly assembled lithium battery according to claim 1, characterized in that: The top of the lower base plate (501) is provided with an explosion-proof valve hole 1 (503), the inner side of the lower base plate (501) is fixedly connected with an explosion-proof valve plate (504), the inner side of the lower base plate (501) is fixedly connected with a pole base (505), the top of the pole base (505) is fixedly connected with a sealing ring (506), the top of the lower base plate (501) is fixedly connected with an explosion-proof valve plate (507), the top of the lower base plate (501) is fixedly connected with an upper base plate (508), the bottom of the upper base plate (508) is provided with an explosion-proof valve hole 2 (509) connected to the explosion-proof valve hole 1 (503), the upper base plate (508 ... explosion-proof valve plate (507), the top of the lower base plate (501) is fixedly connected with an explosion-proof valve plate (507), the top of the lower base plate (501) is fixedly connected with an explosion-proof valve plate (507), the top of the lower base plate (50 ) is fixedly connected to the top of an explosion-proof valve protection patch (510), a circular concave hole (511) is provided on the top of the upper substrate (508), a circular pole (512) is fixedly connected to the inner wall of the sealing ring (506), an upper plastic (513) is sleeved and fixedly connected to the outer side of the circular pole (512), a liquid injection hole (514) is provided on the top of the upper substrate (508), a sealing nail (515) is slidably connected to the inner wall of the liquid injection hole (514), a sealing aluminum nail (516) is provided on the top of the sealing nail (515), and the outer side of the sealing aluminum nail (516) is fixedly connected to the inner wall of the liquid injection hole (514).

4. The quickly assembled lithium battery according to claim 3, characterized in that: The bottom of the pole base (505) is fixedly connected to the top of the pole lug (2), and the outer side of the upper base plate (508) is fixedly connected to the inner wall of the protective device (6).

5. The quickly assembled lithium battery according to claim 3, characterized in that: The explosion-proof valve plate (504) is configured as an elliptical plate having a plurality of strip-shaped air holes on its surface; the explosion-proof valve plate (507) is configured as an elliptical plate having a Y-shaped notch on its surface; the bottom of the circular concave hole (511) passes through the upper substrate (508) and extends to the bottom of the lower substrate (501); the inner wall of the circular concave hole (511) is fixedly connected to the outer side of the sealing ring (506); and the bottom of the injection hole (514) passes through the upper substrate (508) and extends to the bottom of the lower substrate (501).

6. The quickly assembled lithium battery according to claim 1, characterized in that: The inner wall of the sleeve-type aluminum shell (601) is fixedly connected to the outer side of the upper base plate (508), the inner wall of the sleeve-type aluminum shell (601) is fixedly connected to the outer side of the insulating tape (3), and the bottom of the inner wall of the sleeve-type aluminum shell (601) is fixedly connected to the bottom of the bottom support plate (7).

7. The quickly assembled lithium battery according to claim 1, characterized in that: The end of the arc-shaped connecting rod (6021) away from the first ring plate (6022) is fixedly connected to the outer side of the sleeve-type aluminum shell (601), the side of the second ring plate (6024) away from the return spring (6023) is fixedly connected to one side of the circular plate (605), and the end of the arc-shaped sliding rod (6025) close to the second ring plate (6024) is fixedly connected to one side of the circular plate (605).

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