Cylindrical battery baking device
The cylindrical battery baking device, which uses multi-part heating and negative pressure air replacement, solves the problem of uneven heating in existing technologies, achieves rapid and uniform heating of the battery cells, and improves battery performance and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-03-06
AI Technical Summary
In existing cylindrical battery manufacturing processes, hot air circulation heating results in uneven temperatures and high energy consumption, while contact baking heating is slow, leading to poor consistency in cell internal resistance and affecting cell performance.
The cylindrical battery baking device employs multi-part heating, simultaneously heating the bottom, sides, and center of the battery through heating elements and heating rods. Combined with air displacement under negative pressure, it ensures high heat conduction efficiency and uniform heating.
The baking time was shortened, the heating rate and heat uniformity of the cells were improved, the performance of the cells was enhanced, and the quality consistency of the batteries was ensured.
Smart Images
Figure CN223976328U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cylindrical battery production technology, and specifically to a cylindrical battery baking device. Background Technology
[0002] The moisture content inside cylindrical lithium batteries must be strictly controlled, as moisture has a significant impact on the initial capacity, cycle performance, internal resistance, and thickness of lithium batteries.
[0003] Currently, existing cylindrical battery manufacturing processes generally employ two methods to remove moisture from the batteries: hot air circulation heating and contact baking. Hot air circulation heating has been gradually phased out by the market due to its poor temperature uniformity, long baking time, and high energy consumption. Contact baking heating, on the other hand, relies solely on heat conduction from the bottom heating plate, resulting in slow cell heating, uneven cell heating, poor internal resistance consistency, and hindering the effective performance of the cells. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a cylindrical battery baking device that heats the cylindrical battery from multiple locations, resulting in high heat conduction efficiency, good baking effect, and ensuring uniform heating of the battery cell, thus effectively maximizing the battery cell's performance.
[0005] To achieve the above objectives, the present invention provides the following technical solution:
[0006] A cylindrical battery baking device, comprising:
[0007] The tray contains several sets of positioning elements arranged in a matrix.
[0008] A heating kit, which plugs into each of the aforementioned positioning elements, has a cylindrical heating zone for inserting a cylindrical battery to bake its bottom and sides; and
[0009] The heating rod assembly has multiple linearly arranged heating rods that can extend axially from top to bottom into the cylindrical battery cells in the heating zone to bake the middle of the latter.
[0010] In one embodiment disclosed in this application, each set of positioning elements contains four circumferentially distributed positioning pins;
[0011] The heating kit includes a heating base and a heating sleeve;
[0012] The bottom surface of the heating base is provided with four pin holes, and the pin holes are inserted and connected to the positioning pins one by one.
[0013] The heating sleeve is snapped onto the heating base to form a heating zone with the heating base as its base.
[0014] In one embodiment disclosed in this application, the depth of the heating zone is greater than the length of the cylindrical battery so as to surround the cylindrical battery in all directions.
[0015] In one embodiment disclosed in this application, the top surface of the heating base is provided with an annular step, and the area enclosed by the annular step is used to restrict the lower current collector of the cylindrical battery;
[0016] The lower edge of the heating sleeve is provided with an annular boss, which is engaged with the annular step.
[0017] In one embodiment disclosed in this application, a heating plate is provided at the top of the heating rod;
[0018] The heating plate is in contact with the upper current collector of the cylindrical battery in a fitted manner.
[0019] In one embodiment disclosed in this application, the outer diameter of the heating plate is smaller than the inner diameter of the heating sleeve, so as to form an annular gap between the heating sleeve and the heating plate for the escape of moisture during the baking process of the cylindrical battery.
[0020] In one embodiment disclosed in this application, the heating rod assembly includes a bracket with a handle;
[0021] The bracket is connected to the heating plate at the top of each of the heating rods.
[0022] In one embodiment disclosed in this application, the heating base, heating sleeve, heating rod, and heating plate are used to bake the cylindrical battery using a heating method that first changes the temperature and then keeps it constant.
[0023] In one embodiment disclosed in this application, eight heating rods are arranged linearly.
[0024] The heating kit matrix is arranged in 64 groups.
[0025] In one embodiment disclosed in this application, a lid is provided over the tray to form a sealed cavity;
[0026] The sealed cavity is in a negative pressure environment and is equipped with a blower ventilation system to replace the air inside.
[0027] Compared with the prior art, the beneficial effects of this utility model are:
[0028] 1. The heating kit and heating rod simultaneously heat the bottom, sides and center of the cylindrical battery cell. The high heat conduction efficiency can shorten the baking time and improve the baking effect, ensuring that the cell heats up quickly and evenly, effectively maximizing the cell's performance.
[0029] 2. The heating base and heating plate in the heating zone can heat and bake the bottom and top of the cylindrical battery, while generating heat convection inside the cylindrical battery cell to further improve the baking effect.
[0030] 3. Through a sealed cavity in a negative pressure environment that allows for air exchange, the water vapor produced by baking in the cylindrical battery can be removed in a timely manner, thus improving the baking effect of the cylindrical battery. Attached Figure Description
[0031] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0032] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0033] Figure 2 This is a schematic diagram of the three-dimensional structure of the tray;
[0034] Figure 3 This is a schematic diagram of the main cross-sectional structure of the heating kit and heating rod;
[0035] Figure 4 Schematic diagram of the three-dimensional structure of the heating base Figure 1 ;
[0036] Figure 5 Schematic diagram of the three-dimensional structure of the heating base Figure 2 ;
[0037] Figure 6 This is a three-dimensional structural diagram of the heating sleeve;
[0038] Figure 7 This is a schematic diagram of the three-dimensional structure of the heating rod assembly. Detailed Implementation
[0039] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.
[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0044] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.
[0045] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.
[0046] See Figures 1 to 7 As shown, this utility model provides a cylindrical battery baking device, comprising:
[0047] The tray 100 has several sets of positioning elements 110 arranged in a matrix inside;
[0048] A heating kit 200, which plugs into each positioning element 110, has a cylindrical heating zone for inserting a cylindrical battery to bake its bottom and sides; and
[0049] The heating rod assembly 300 has multiple linearly arranged heating rods 310 that can extend axially from top to bottom into the cylindrical battery cells in the heating zone to bake the middle of the latter.
[0050] During operation, the cylindrical battery is placed in the heating zone, and then the heating rod 310 is inserted from top to bottom to penetrate the cylindrical battery cell. Power is then applied, causing the heating kit 200 and heating rod 310 to activate and generate heat, thus baking the bottom, sides, and center of the cylindrical battery. Moisture escapes from the cylindrical battery cell and evaporates along the top of the heating zone. In other words, the heating kit 200 and heating rod 310 simultaneously heat the bottom, sides, and center of the cylindrical battery cell, resulting in high heat conduction efficiency, shortening baking time, improving baking effect, ensuring rapid and uniform heating of the cell, and effectively maximizing cell performance.
[0051] Each set of positioning components 110 contains four circumferentially distributed positioning pins; the heating kit 200 includes a heating base 210 and a heating sleeve 220; the bottom surface of the heating base 210 is provided with four pin holes 211, and the pin holes 211 are inserted and connected to the positioning pins one by one; the heating sleeve 220 is snapped onto the heating base 210 to form a heating area with the heating base 210 as the bottom.
[0052] In this embodiment, the depth of the heating zone is greater than the length of the cylindrical battery to completely surround the cylindrical battery.
[0053] The top surface of the heating base 210 is provided with an annular step 212, and the area enclosed by the annular step 212 is used to restrict the lower current collector of the cylindrical battery; the lower edge of the heating sleeve 220 is provided with an annular boss 221, and the annular boss 221 is snapped into the annular step 212.
[0054] The heating rod 310 has a heating plate 311 at its top, which is in close contact with the upper current collector of the cylindrical battery. Through the heating base 210 and the heating plate 311 in the heating zone, the bottom and top of the cylindrical battery can be heated and baked, and heat convection is generated inside the cylindrical battery cell to further improve the baking effect.
[0055] The outer diameter of the heating plate 311 is smaller than the inner diameter of the heating sleeve 220, so as to form an annular gap between the heating sleeve 220 and the heating plate 311 for the escape of moisture during the baking process of the cylindrical battery.
[0056] The heating rod assembly 300 includes a bracket 320 with a handle 321, which is connected to the heating plate 311 at the top of each heating rod 310. The bracket 320 with the handle 321 allows for the quick placement and removal of multiple linearly arranged heating rods 310.
[0057] The heating base 210, heating sleeve 220, heating rod 310, and heating plate 311 bake the cylindrical battery using a heating method that first changes the temperature and then maintains a constant temperature. Specifically, in the initial temperature-changing stage (within 0 to 1 hour), the heating base 210, heating sleeve 220, heating rod 310, and heating plate 311 simultaneously and slowly increase the temperature from 0°C to 95°C, and then maintain a constant temperature of 95°C to enter the constant temperature stage and continuously bake the cylindrical battery for 12 hours.
[0058] In this embodiment, there are eight linearly arranged heating rods 310 and 64 matrix-arranged heating kits 200. This allows for the simultaneous baking of 64 cylindrical batteries, shortening the overall baking time of the production line and improving production line efficiency.
[0059] To improve the baking effect of the cylindrical batteries, a lid (not shown in the figure) is provided on the tray 100 to form a sealed cavity. This sealed cavity is in a negative pressure environment and is equipped with a blower to replace the air inside. Specifically, during the baking process, a vacuum pump or similar negative pressure device is used to evacuate the sealed cavity, while a blower or similar ventilation device blows air into the sealed cavity to promptly remove the water vapor formed by the baking process from the cylindrical batteries.
[0060] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.
Claims
1. A cylindrical battery baking apparatus characterized by comprising: The invention relates to a cylindrical battery baking device, comprising: a tray, inside which are arranged a plurality of groups of positioning members arranged in a matrix; a heating sleeve assembly, which is connected to each group of the positioning members by means of a plug-in connection, and which is provided with a cylindrical heating zone for placing a cylindrical battery so as to bake the bottom and the periphery of the latter; and a heating rod group, which has a plurality of linearly arranged heating rods that can axially extend into the cylindrical battery cell in the heating zone from top to bottom so as to bake the middle part of the latter.
2. The cylindrical battery baking device according to claim 1, wherein: each group of the positioning members comprises four circumferentially distributed positioning pins; the heating sleeve assembly comprises a heating base and a heating sleeve; the heating base is provided on the bottom surface thereof with four pin holes, which are connected to the positioning pins by means of a plug-in connection in a one-to-one correspondence; the heating sleeve is connected to the heating base by means of a clamping connection to form a heating zone with the heating base as the bottom.
3. The cylindrical battery baking apparatus according to claim 1 or 2, characterized by, The depth of the heating zone is greater than the length of the cylindrical battery so as to fully surround the cylindrical battery.
4. The cylindrical battery baking device according to claim 2, wherein: the heating base is provided on the top surface thereof with an annular step, and the area surrounded by the annular step is used to limit the lower current collecting plate of the cylindrical battery; the heating sleeve is provided on the lower edge thereof with an annular boss, which is connected to the annular step by means of a clamping connection.
5. The cylindrical battery baking device according to claim 4, wherein: the heating rod is provided on the top end thereof with a heating disc; the heating disc is in contact with the upper current collecting plate of the cylindrical battery in a manner of close fit.
6. The cylindrical battery baking apparatus according to claim 5, wherein The outer diameter of the heating disc is smaller than the inner diameter of the heating sleeve, so as to form an annular gap between the heating sleeve and the heating disc for the escape of moisture during the baking process of the cylindrical battery.
7. The cylindrical battery baking device according to claim 5 or 6, wherein: the heating rod group comprises a bracket with a handle; the bracket is connected to the heating disc on the top end of each heating rod.
8. The cylindrical battery baking apparatus according to claim 7, wherein The heating base, the heating sleeve, the heating rod and the heating disc are used to bake the cylindrical battery in a heating mode of first temperature variation and then constant temperature.
9. The cylindrical battery baking device according to claim 1 or 8, wherein: the heating rods are linearly arranged in 8 numbers; the heating sleeve assembly is arranged in a matrix in 64 groups.
10. The cylindrical battery baking device according to claim 1, wherein: a box cover is arranged above the tray to form a closed cavity; the closed cavity is in a negative pressure environment and is provided with a blowing and ventilation device to replace the air inside.