Contact type vacuum oven

Abstract

The utility model discloses a contact type vacuum oven which comprises an outer-layer oven body and a vacuum oven body installed in the outer-layer oven body, a sealing door plate used for sealing the vacuum oven body is installed on the outer-layer oven body, and a vacuum valve set and a cooling pipeline which are communicated with the vacuum oven body are installed in the outer-layer oven body. A layered support is installed in the vacuum box body and comprises a plurality of vertical rods arranged at intervals, a plurality of layers of hollow supports are arranged on the vertical rods in the longitudinal direction, a first support is installed on each layer of hollow support, and a cover plate, a heating film and a heating plate are sequentially installed on each first support. A plurality of material boxes are arranged on the heating plate in an array mode and used for containing lithium batteries. The vacuum box body is provided with threading pipes corresponding to the heating films respectively, and wires of the heating films are arranged along the threading pipes. Contact type heating of the lithium battery is achieved, the heating uniformity is improved, and the baking efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery baking technology, and in particular to a contact vacuum oven. Background Technology

[0002] Because the moisture content inside lithium batteries must be strictly controlled, as moisture significantly impacts battery performance, including voltage, internal resistance, and self-discharge, excessive moisture content can lead to product failure, quality degradation, and even explosion. Therefore, in multiple production processes of lithium batteries, the positive and negative electrode sheets, the battery cell, and the main battery itself undergo multiple vacuum baking processes to remove as much moisture as possible.

[0003] A battery-specific vacuum oven is a vacuum oven specifically designed for the baking process of lithium-ion batteries. Due to the special nature of the oven materials, a lithium battery-specific vacuum oven needs to have characteristics such as resistance to strong acid and alkali corrosion, precise temperature control, high efficiency of program control, and stability and safety.

[0004] Existing vacuum ovens primarily heat and bake lithium batteries by placing them inside the cavity. This non-contact baking method results in poor temperature uniformity around the lithium batteries and limited baking efficiency. Utility Model Content

[0005] (I) Technical Issues

[0006] The purpose of this invention is to provide a contact vacuum oven that solves the problem of uneven heating and reduced baking efficiency of lithium batteries when they are placed directly in the existing vacuum oven and then baked using a non-contact heating method.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A contact vacuum oven includes an outer casing and a vacuum chamber installed inside the outer casing. The outer casing has a sealing door for sealing the vacuum chamber. The outer casing contains a vacuum valve assembly and cooling pipes connecting to the vacuum chamber. The vacuum chamber contains a layered support structure, including multiple spaced uprights with multiple hollow supports arranged longitudinally on each upright. Each hollow support layer has a first support, on which a cover plate, a heating film, and a heating plate are sequentially mounted. Multiple material boxes are arranged in an array on the heating plate for holding lithium batteries. The vacuum chamber has conduits corresponding to each heating film layer, with the heating film's wires running along the conduits.

[0010] Preferably, the vacuum chamber includes a first inner layer and a second inner layer, with a plurality of rectangular tubes spaced apart between the first inner layer and the second inner layer.

[0011] Preferably, the bottom of the outer casing is provided with rollers and height-adjustable feet.

[0012] Preferably, the top of the outer casing is provided with spaced-apart brackets for fixing.

[0013] Preferably, temperature probes are installed at intervals on the bottom of the cover plate.

[0014] Preferably, the material box includes a box body, the bottom of the box body has an array of through holes for exposing a portion of the lithium battery, and the bottom of the box body has four limiting posts located around each of the through holes.

[0015] Preferably, a wire trough is installed on the hollow support, and a wiring board is provided on one of the uprights. The wire trough and the wiring board are used to lay the wires of the heating film and the temperature probe.

[0016] Preferably, the heating plate is equipped with a partition located between two adjacent material boxes.

[0017] Preferably, the material box is made of a thermally conductive material.

[0018] Preferably, the hollow support has 6 layers.

[0019] (III) Beneficial Effects

[0020] The vacuum chamber is evacuated by a vacuum valve assembly. The first support is installed on the multi-layer hollow support on the layered support. Each layer of the first support is equipped with a cover plate, a heating film and a heating plate, so that each layer can be independently temperature controlled. After the material box containing the lithium battery is placed directly on the heating plate, the heat is transferred directly to the lithium battery through the heating plate and the material box, so that the temperature around the lithium battery is uniform. At the same time, the multi-layer cover plate arranged in layers also conducts heat to the layer below, further improving the temperature uniformity of the lithium battery on the top and bottom sides.

[0021] The control electrical components are installed inside the outer casing of the vacuum chamber, and the internal wires are routed through conduit to avoid damage.

[0022] Meanwhile, the integrated cooling pipes can circulate heat when the internal temperature needs to be lowered. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0024] Figure 2 This is a cross-sectional view of the box body in an embodiment of the present utility model;

[0025] Figure 3This is a schematic diagram of the layered lithium battery structure in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the layered support in an embodiment of this utility model;

[0027] Figure 5 This is a schematic diagram of the heating plate assembly in an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the material box structure in an embodiment of the present utility model;

[0029] exist Figures 1 to 6 In the diagram, the correspondence between component names or lines and the drawing numbers is as follows:

[0030] Outer casing 1, vacuum casing 2, first inner layer 21, second inner layer 22, rectangular tube 23, sealing door panel 3, vacuum valve assembly 4, cooling pipe 5, layered support 6, upright 61, hollow support 62, first support 7, cover plate 8, heating film 9, heating plate 10, conduit 11, support leg 12, roller 13, fixed support 14, temperature probe 15, material box 16, box body 161, through hole 162, limiting post 163, wire trough 17, wiring board 18. Detailed Implementation

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] See Figures 1-6 As shown, this utility model proposes a contact vacuum oven, including an outer casing 1 and a vacuum chamber 2 installed inside the outer casing 1. The vacuum chamber 2 has heat insulation and heat preservation functions, so pipelines and electrical system components can be arranged inside the outer casing 1 outside the vacuum chamber 2. Simultaneously, a sealing door 3 for sealing the vacuum chamber 2 is installed on the outer casing 1. A vacuum valve assembly 4 and a cooling pipeline 5 communicating with the vacuum chamber 2 are installed inside the outer casing 1. The sealing door 3 is used to seal the vacuum chamber 2 to ensure the internal temperature. The vacuum valve assembly 4 is connected to an external vacuum pump to adjust the vacuum level inside the vacuum chamber 2, while the cooling pipeline 5 mainly achieves temperature regulation inside the vacuum chamber 2 through external cooling circulation heat exchange. Specifically, the vacuum system, cooling system, and control system have all been described in previous applications and are mature technologies, and will not be described in detail in this embodiment. This embodiment mainly improves the optimized structure related to contact heating inside the vacuum chamber 2 to improve the temperature uniformity and efficiency during the lithium battery baking process.

[0033] Specifically, a layered support structure 6 is installed inside the vacuum chamber 2. The layered support structure 6 includes multiple spaced uprights 61, with multiple layers of hollow supports 62 arranged longitudinally on the uprights 61. Each layer of hollow supports 62 has a first support 7 installed on it. A cover plate 8, a heating film 9, and a heating plate 10 are sequentially installed on the first support 7. Multiple material boxes 16 are arranged in an array on the heating plate 10, and these material boxes 16 are used to hold lithium batteries. The hollow supports 62 are used to install the unit structure formed by the first support 7, the cover plate 8, the heating film 9, and the heating plate 10. After the heating film 9 generates heat, it conducts heat outward through the cover plate 8 and the heating plate 10. The material boxes 16 then conduct heat from the heating plate 10 to bake the internal lithium batteries, thus creating a uniform baking process around the lithium batteries and improving baking efficiency. Direct heat conduction from the heat source to the lithium batteries forms a contact heating method, resulting in more uniform heating of the lithium batteries and higher baking efficiency.

[0034] Specifically, the vacuum chamber 2 is provided with conduits 11 corresponding to each heating film 9. The wires of the heating film 9 are laid along the conduits 11. The wires are passed through the conduits 11 to facilitate heat insulation and sealing inside the conduits 11, thus protecting the devices inside the outer chamber 1 and also protecting the wires.

[0035] Specifically, the vacuum chamber 2 includes a first inner layer 21 and a second inner layer 22. Multiple rectangular tubes 23 are spaced apart between the first inner layer 21 and the second inner layer 22. The double-layer structure ensures internal heat insulation and heat preservation effects, and heat insulation material is also filled between adjacent rectangular tubes 23.

[0036] Meanwhile, at the bottom of the outer casing 1, there are rollers 13 and adjustable feet 12. The feet 12 provide support after the oven is positioned, and when it needs to be moved, the height of the feet 12 is adjusted so that the rollers 13 are subjected to force and guided to move.

[0037] A fixing bracket 14 is installed at intervals on the top of the outer casing 1. The fixing bracket 14 is used to install other equipment and devices that need to be installed on the top of the outer casing 1. The fixing bracket 14 can prevent damage to the outer casing 1.

[0038] Specifically, temperature probes 15 are installed at intervals at the bottom of the cover plate 8, typically two in number. One temperature probe 15 is used for temperature adjustment and detection, while the other temperature probe 15 is used for temperature limit detection.

[0039] To ensure the lithium batteries are properly placed and to improve the heat conduction of the box 161, the material box 16 specifically includes a box body 161. The bottom of the box body 161 has through holes 162 arranged in an array to expose part of the lithium batteries. The bottom of the box body 161 has four limiting posts 163 located around each of the through holes 162. The through holes 162 position the lithium batteries and facilitate contact with the heat-conducting parts at the bottom. The limiting posts 163 can separate and limit the lithium batteries. At the same time, the limiting posts 163 can also improve the temperature uniformity around the lithium batteries and further improve the baking efficiency.

[0040] The material box 16 is made of a heat-conducting material, such as metal or high-temperature resistant plastic, which can absorb heat and conduct it to the interior.

[0041] To ensure that adjacent material boxes 16 are placed neatly and spaced apart, a partition is installed on the heating plate 10 between two adjacent material boxes 16.

[0042] Meanwhile, the internal wiring needs to be protected to prevent damage to the wires caused by high temperature. Specifically, a wire trough 17 is installed on the hollow bracket 62, and a wiring board 18 is provided on one of the uprights 61. The wire trough 17 and the wiring board 18 are used to lay the wires of the heating film 9 and the temperature probe 15. The wires can be protected after being laid by the wire trough 17 and the wiring board 18.

[0043] Adapted to the internal height of the vacuum chamber 2, a hollow support 62 is set up when the layered support 6 can be placed, and each layer can hold 15 material boxes 16, each material box 16 can hold 240 lithium batteries, which is equivalent to 100,800 lithium batteries in a batch baking process, and ensures that each lithium battery can be heated evenly, thus improving baking efficiency.

[0044] 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 mechanical connection or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A contact vacuum oven, characterized in that: It includes an outer casing and a vacuum chamber installed inside the outer casing. The outer casing is equipped with a sealing door panel for sealing the vacuum chamber. The outer casing is equipped with a vacuum valve assembly and a cooling pipe that connects to the vacuum chamber. The vacuum chamber is equipped with a layered support, which includes multiple uprights spaced apart. Multiple hollow supports are arranged longitudinally on the uprights. Each hollow support is equipped with a first support. A cover plate, a heating film and a heating plate are sequentially installed on the first support. Multiple material boxes are arranged in an array on the heating plate. The material boxes are used to hold lithium batteries. The vacuum chamber is equipped with conduits corresponding to each heating film layer, and the wires of the heating film are laid along the conduits.

2. A contact vacuum oven according to claim 1, characterized in that: The vacuum chamber includes a first inner layer and a second inner layer, with multiple rectangular tubes spaced apart between the first inner layer and the second inner layer.

3. A contact vacuum oven according to claim 2, characterized in that: The bottom of the outer casing is equipped with casters and height-adjustable feet.

4. A contact vacuum oven according to claim 2, characterized in that: The top of the outer casing is fitted with spaced brackets for fixing.

5. A contact vacuum oven according to any one of claims 1-4, characterized in that: Temperature probes are installed at intervals on the bottom of the cover plate.

6. A contact vacuum oven according to claim 5, characterized in that: The material box includes a box body, the bottom of which is provided with an array of through holes for exposing a portion of the lithium battery, and the bottom of the box body is provided with four limiting posts located around each of the through holes.

7. A contact vacuum oven according to claim 6, characterized in that: The hollow support is equipped with a wire trough, and one of the uprights is equipped with a wiring board. The wire trough and the wiring board are used to lay the wires of the heating film and the temperature probe.

8. A contact vacuum oven according to claim 5, characterized in that: The heating plate is equipped with a partition located between two adjacent material boxes.

9. A contact vacuum oven according to claim 8, characterized in that: The material box is made of thermally conductive material.

10. A contact vacuum oven according to claim 5, characterized in that: The hollow support has 6 layers.

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