Cylindrical lithium battery processing and packaging equipment

Abstract

The application relates to the technical field of battery packaging equipment, and discloses a cylindrical lithium battery processing and packaging equipment, which comprises a support, the top of the inner cavity of the support is provided with a sleeve structure, an elastic colloid is arranged on the inner wall of the sleeve structure, an aluminum alloy shell is clamped on the inner wall of the elastic colloid, a heating assembly is arranged in the inner cavity of the aluminum alloy shell, a gas inlet pipeline is arranged in the middle of the outer surface of the support, a gas outlet pipeline is arranged on the top of the outer surface of the support, and the gas inlet pipeline and the gas outlet pipeline form a circulation loop with a cooling pump group system. The cylindrical lithium battery processing and packaging equipment is provided with the heating assembly, when the cylindrical winding core is sleeved and packaged, the aluminum alloy shell can be heated and expanded by using the electric heating member first, and a certain degree of thermal expansion is caused, so that the inner cross-sectional area is increased, and in the process of sleeving the cylindrical winding core, the electrode coating on the outer surface of the cylindrical winding core is not easy to be scratched or extruded and damaged.

Description

A cylindrical lithium battery processing and packaging equipment Technical Field

[0001] This application relates to the field of battery packaging equipment technology, and in particular to a cylindrical lithium battery processing and packaging equipment. Background Technology

[0002] With the development of new energy technologies, batteries, as core power and energy storage units, are of paramount importance. Among them, lithium batteries have become the mainstream battery technology due to their high energy density, long cycle life, lightweight and environmentally friendly characteristics, and are widely used in various portable devices and electric vehicles.

[0003] Cylindrical lithium batteries, as one of the current mainstream packaging forms, have standardized structural dimensions, making them easy to mass-produce and interchange. The heat dissipation path inside the battery is relatively uniform, resulting in good heat dissipation during charging and discharging, and high safety and stability. However, when the core of the existing cylindrical lithium battery is inserted into the alloy shell for packaging, the strict requirements for the insertion rate result in a small gap between the cross-sectional area of ​​the core and the inner cross-sectional area of ​​the alloy shell. As a result, during the process of inserting the core into the alloy shell, the upper electrode sheet is prone to scratching or squeezing damage to the electrode coating on its surface, and may even cause wrinkles in the electrode coating, posing a significant safety hazard and poor stability and reliability.

[0004] Therefore, there is an urgent need for a packaging device for cylindrical lithium batteries to solve the defects of existing cylindrical lithium batteries in the packaging of the core. Summary of the Invention

[0005] This application proposes a cylindrical lithium battery processing and packaging equipment, which has the advantage of effectively avoiding scratching or squeezing damage to the electrode coating on the surface of the core during the process of inserting the core into the alloy shell. This solves the problem that in the existing cylindrical lithium battery packaging process, due to the strict requirements of the core insertion rate, the gap between the cross-sectional area of ​​the core and the inner cross-sectional area of ​​the alloy shell is small. As a result, during the process of inserting the core into the alloy shell, the upper electrode sheet is prone to scratching or squeezing damage to the electrode coating on its surface, and may even cause wrinkles in the electrode coating.

[0006] To achieve the above objectives, this application adopts the following technical solution: a cylindrical lithium battery processing and packaging equipment, including a bracket that can be fixedly installed on an operating table by bolts, the top of the inner cavity of the bracket is provided as a sleeve structure, and an elastic colloid is provided on the inner wall of the sleeve structure. An aluminum alloy shell is snapped onto the inner wall of the elastic colloid. The aluminum alloy shell is transported to the top of the bracket by a material conveying system and squeezed into the interior of the elastic colloid. A heating component with its bottom end set on the bracket is provided in the inner cavity of the aluminum alloy shell, and the heating component can move downwards during the process of the cylindrical core being sleeved onto the aluminum alloy shell.

[0007] Furthermore, the aluminum alloy shell can be heated by the heating component to cause a certain degree of thermal expansion. Under the action of the elastic colloid, the aluminum alloy shell can be forced to expand outward evenly to increase its inner cross-sectional area. During the process of inserting the cylindrical core, the electrode coating on the outer surface of the cylindrical core is not easily scratched or squeezed and damaged.

[0008] The electrode coating on the lithium battery can withstand a temperature range of approximately 120-150 degrees Celsius. The coefficient of thermal expansion of aluminum alloy is approximately 23.2, meaning that for every 1 degree Celsius increase in temperature, the dimensions of the aluminum alloy casing will expand by approximately 0.00023%. Based on a safe and reliable design, the maximum heating temperature of the heating component is controlled at 100 degrees Celsius, which further increases the thermal expansion of the inner cross-section of the aluminum alloy casing by 0.0184%.

[0009] An air inlet pipe is provided in the middle of the outer surface of the bracket, which connects to the bottom of the sleeve structure. An air outlet pipe is provided at the top of the outer surface of the bracket, which connects to the top of the sleeve structure. The air inlet pipe and the air outlet pipe form a flow loop with the cooling pump system. After the cylindrical core is completely inserted into the aluminum alloy shell, the pump system can be triggered to cool the aluminum alloy shell through the air inlet pipe and the air outlet pipe, so that it returns to the initial inner cross-sectional area and securely wraps the cylindrical core inside to complete the encapsulation operation.

[0010] Furthermore, a transmission rod extending to the bottom of the support is fixedly installed at the bottom of the heating component, and the outer surface of the transmission rod is connected to a second linear drive mechanism fixedly installed at the bottom of the support. Thus, under the action of the second linear drive mechanism, the transmission rod and the heating component on it can be driven to move upward or downward.

[0011] In the initial stage, under the transmission action of the second linear drive mechanism and the transmission rod, the heating component can be moved to the upper position to heat the aluminum alloy shell on the elastic colloid and cause it to undergo a certain degree of thermal expansion.

[0012] As the cylindrical core is inserted, the heating assembly, driven by the second linear drive mechanism and the transmission rod, moves downwards at the same speed as the cylindrical core is inserted.

[0013] Furthermore, the heating assembly includes an electric heating component whose bottom end is fixedly connected to the transmission rod, and a top cover is provided at the top of the electric heating component. An elastic airbag is fixedly installed on the outer surface of the top cover, and the elastic airbag is connected to an inner cavity opened inside the top cover.

[0014] Furthermore, the top cover and the inner cavity are filled with gas. When the heating element is energized and triggered, the gas in the top cover and the inner cavity expands to compress the inner wall of the aluminum alloy shell, thereby making the thermal expansion of the aluminum alloy shell more uniform and preventing irregular deformation of its inner cross-section due to thermal expansion.

[0015] Furthermore, a first linear drive mechanism is fixedly installed in the middle of the inner cavity of the bracket, and a discharge sleeve with its top end in contact with the bottom end of the aluminum alloy shell is connected to the first linear drive mechanism. After the cylindrical core is packaged, the first linear drive mechanism can be triggered to drive the discharge sleeve to move upward, squeezing the aluminum alloy shell and the cylindrical core fitted on it upward and discharging them.

[0016] Furthermore, the heating element is divided into upper and lower parts, and the energization state of the upper and lower parts is controlled independently according to the relative position of the heating element. When the heating element is completely aligned with the inner cavity of the aluminum alloy shell, both the upper and lower parts of the heating element are triggered simultaneously. As the heating element gradually moves downward with the insertion of the cylindrical core, the lower part of the heating element is turned off, while the upper part remains energized and triggered, thereby effectively reducing the energy consumption of the heating component during operation.

[0017] Furthermore, the elastic colloid has several sets of through holes arranged in a circular array along its radial direction, which can effectively increase the contact area between the gas flowing in the air inlet and outlet pipes and the outer surface of the aluminum alloy shell, improve the heat transfer efficiency between them, and allow the aluminum alloy shell to cool down in a shorter time.

[0018] The beneficial effects of this invention are as follows:

[0019] This application provides a cylindrical lithium battery processing and packaging equipment. Regarding the setting of the heating component, when performing the packaging operation of the cylindrical core, the aluminum alloy shell can be heated and expanded using an electric heating component to increase its internal cross-sectional area. This makes it less likely for the electrode coating on the outer surface to be scratched or squeezed during the process of inserting the cylindrical core, or even to cause wrinkles. Then, the aluminum alloy shell is cooled using an air inlet pipe and an air outlet pipe, so that the inserted cylindrical core can be securely wrapped inside to complete the packaging operation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0021] Figure 1 is a schematic diagram of the structure of the present invention;

[0022] Figure 2 is a front view of the structure of the present invention;

[0023] Figure 3 is an enlarged schematic diagram of point A in the structural diagram 1 of the present invention;

[0024] Figure 4 is a schematic diagram of the installation structure of the aluminum alloy shell of the present invention;

[0025] Figure 5 is a schematic diagram of the heating component of the present invention.

[0026] In the diagram: 1-bracket, 2-elastic colloid, 3-inlet pipe, 4-outlet pipe, 5-aluminum alloy shell, 6-heating component, 7-cylindrical core, 8-unloading sleeve, 9-first linear drive mechanism, 10-transmission rod, 11-second linear drive mechanism, 12-electric heating component, 13-top cover, 14-elastic airbag, 15-inner chamber. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] As shown in Figures 1 and 2, a cylindrical lithium battery processing and packaging equipment includes a bracket 1 that can be fixedly installed on an operating table by bolts. The top of the inner cavity of the bracket 1 is set as a sleeve structure, and an elastic colloid 2 is provided on the inner wall of the sleeve structure. An aluminum alloy shell 5 is snapped onto the inner wall of the elastic colloid 2. The aluminum alloy shell 5 is transported to the top of the bracket 1 by a material conveying system and squeezed into the interior of the elastic colloid 2. A heating component 6 with its bottom end set on the bracket 1 is provided in the inner cavity of the aluminum alloy shell 5. During the process of the cylindrical core 7 being sleeved into the aluminum alloy shell 5, the heating component 6 can move downward accordingly.

[0029] Furthermore, the aluminum alloy shell 5 can be heated by the heating component 6 to cause a certain degree of thermal expansion. Under the action of the elastic colloid 2, the aluminum alloy shell 5 can be forced to expand outward evenly to increase its inner cross-sectional area. During the process of inserting the cylindrical core 7, the electrode coating on the outer surface of the cylindrical core 7 is not easily scratched or squeezed and damaged.

[0030] The electrode coating on the lithium battery can withstand a temperature range of approximately 120-150 degrees Celsius. The coefficient of thermal expansion of aluminum alloy is approximately 23.2, meaning that for every 1 degree Celsius increase in temperature, the dimensions of the aluminum alloy shell will expand by approximately 0.00023%. Based on a safe and reliable design, the maximum heating temperature of the heating component 6 is controlled at 100 degrees Celsius, which can increase the thermal expansion of the inner cross-section of the aluminum alloy shell 5 by 0.0184%.

[0031] An air inlet pipe 3 is provided in the middle of the outer surface of the bracket 1, which connects to the bottom of the sleeve structure. An air outlet pipe 4 is provided at the top of the outer surface of the bracket 1, which connects to the top of the sleeve structure. The air inlet pipe 3 and the air outlet pipe 4 form a flow loop with the cooling pump system. After the cylindrical core 7 is completely inserted into the aluminum alloy shell 5, the pump system can be triggered to cool the aluminum alloy shell 5 through the air inlet pipe 3 and the air outlet pipe 4, so that it returns to the initial inner cross-sectional area and securely wraps the cylindrical core 7 inside to complete the encapsulation operation.

[0032] As shown in Figure 1, in this technical solution, a transmission rod 10 extending to the bottom of the bracket 1 is fixedly installed at the bottom end of the heating component 6, and the outer surface of the transmission rod 10 is connected to the second linear drive mechanism 11 fixedly installed at the bottom end of the bracket 1. Thus, under the action of the second linear drive mechanism 11, the transmission rod 10 and the heating component 6 on it can be driven to move upward or downward.

[0033] In the initial stage, under the transmission action of the second linear drive mechanism 11 and the transmission rod 10, the heating component 6 can be moved to the upper position to heat the aluminum alloy shell 5 on the elastic colloid 2 so that it undergoes a certain degree of thermal expansion.

[0034] As the cylindrical core 7 is inserted, the heating assembly 6, driven by the second linear drive mechanism 11 and the transmission rod 10, moves downwards at the same speed as the cylindrical core 7 is inserted.

[0035] As shown in Figure 5, in this technical solution, the heating component 6 includes an electric heating component 12 whose bottom end is fixedly connected to the transmission rod 10. The top end of the electric heating component 12 is provided with a top cover 13, and an elastic airbag 14 is fixedly installed on the outer surface of the top cover 13. The elastic airbag 14 is connected to the inner cavity 15 opened inside the top cover 13.

[0036] As shown in Figures 1 and 5, in this technical solution, the top cover 13 and the inner cavity 15 are filled with gas. When the electric heating component 12 is energized and triggered, the gas filled in the top cover 13 and the inner cavity 15 expands to compress the inner wall of the aluminum alloy shell 5, thereby making the thermal expansion of the aluminum alloy shell 5 more uniform and preventing irregular deformation of its inner cross-section due to thermal expansion.

[0037] As shown in Figures 1, 3 and 4, in this technical solution, a first linear drive mechanism 9 is fixedly installed in the middle of the inner cavity of the bracket 1, and a discharge sleeve 8 with its top end in contact with the bottom end of the aluminum alloy shell 5 is connected to the first linear drive mechanism 9. After the cylindrical core 7 is packaged, the first linear drive mechanism 9 can be triggered to drive the discharge sleeve 8 to move upward, thereby squeezing the aluminum alloy shell 5 and the cylindrical core 7 fitted on it upward and discharging them.

[0038] As shown in Figures 1 and 5, in this technical solution, the heating element 12 is divided into upper and lower parts, and the energization state of the upper and lower parts is controlled independently according to the relative position of the heating element 12. When the heating element 12 is completely overlapped with the inner cavity of the aluminum alloy shell 5, the upper and lower parts of the heating element 12 are triggered simultaneously. When the heating element 12 gradually moves down as the cylindrical core 7 is inserted, the lower part of the heating element 12 is turned off, while the upper part remains energized and triggered, so as to effectively reduce the energy consumption of the heating component 6 during operation.

[0039] As shown in Figures 1 and 4, in this technical solution, several sets of through holes are opened on the elastic colloid 2 in a circular array along its radial direction, which can effectively increase the contact area between the gas flowing in the air inlet pipe 3 and the air outlet pipe 4 and the outer surface of the aluminum alloy shell 5, improve the heat transfer efficiency between them, and allow the aluminum alloy shell 5 to cool down in a shorter time.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cylindrical lithium battery processing and packaging equipment, comprising a support (1), characterized in that: The top of the inner cavity of the bracket (1) is provided as a sleeve structure, and an elastic colloid (2) is provided on the inner wall of the sleeve structure. An aluminum alloy shell (5) is snapped onto the inner wall of the elastic colloid (2). A heating component (6) with its bottom end set on the bracket (1) is provided in the inner cavity of the aluminum alloy shell (5). An air inlet pipe (3) is provided in the middle of the outer surface of the bracket (1) and connected to the bottom end of the sleeve structure. An air outlet pipe (4) is provided at the top of the outer surface of the bracket (1) and connected to the top end of the sleeve structure. A flow loop is formed with the cooling pump system through the air inlet pipe (3) and the air outlet pipe (4).

2. The cylindrical lithium battery processing and packaging equipment according to claim 1, characterized in that, The heating assembly (6) is fixedly mounted with a transmission rod (10) extending to the bottom of the bracket (1), and the outer surface of the transmission rod (10) is connected to the second linear drive mechanism (11) fixedly mounted at the bottom of the bracket (1).

3. The cylindrical lithium battery processing and packaging equipment according to claim 2, characterized in that, The heating component (6) includes an electric heating element (12) whose bottom end is fixedly connected to the transmission rod (10). The top end of the electric heating element (12) is provided with a top cover (13), and an elastic airbag (14) is fixedly installed on the outer surface of the top cover (13). The elastic airbag (14) is connected to the inner cavity (15) opened inside the top cover (13).

4. The cylindrical lithium battery processing and packaging equipment according to claim 3, characterized in that, The top cover (13) and the inner chamber (15) are filled with gas, and when the heating element (12) is energized and triggered, the gas filled in the top cover (13) and the inner chamber (15) expands to compress the inner wall of the aluminum alloy shell (5).

5. The cylindrical lithium battery processing and packaging equipment according to claim 1, characterized in that, The first linear drive mechanism (9) is fixedly installed in the middle of the inner cavity of the bracket (1), and the unloading sleeve (8) whose top end contacts the bottom end of the aluminum alloy shell (5) is connected to the first linear drive mechanism (9).

6. The cylindrical lithium battery processing and packaging equipment according to claim 3, characterized in that, The electric heating component (12) is divided into upper and lower parts, and the energization state of the upper and lower parts is controlled separately according to the relative position of the electric heating component (12).

7. The cylindrical lithium battery processing and packaging equipment according to claim 1, characterized in that, The elastic colloid (2) has several sets of through holes arranged in a ring array along its radial direction.

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