Arc-shaped battery contact type drying device

Abstract

The utility model belongs to lithium ion battery technical field, concretely relates to an arc -shaped battery contact type drying device, including drying box body, drying oven door and vacuum air outlet still includes battery heating plate subassembly, the battery heating plate subassembly can place in the cavity of drying box body, the cavity of drying box body is equipped with heating probe and elastic column pin, the battery heating plate subassembly includes battery heating plate and the battery carrier that places on it, be equipped with the heating contact point of corresponding electric connection of heating probe with on the battery heating plate, and the lock hole that corresponds with the elastic column pin is inserted and is matched, be equipped with the carrier recess for accommodating arc -shaped battery on the battery carrier. Compared with traditional non -contact type hot -blast circulation, this device passes through the direct heat conduction of battery carrier and heating plate, and the heat transfer efficiency is greatly improved, can shorten about 4 hours drying time, and the overall efficiency is improved by 50%.

Description

Technical Field

[0001] This utility model belongs to the field of lithium-ion battery technology, specifically relating to an arc-shaped battery contact drying device. Background Technology

[0002] In the manufacturing process of lithium batteries, strict control of moisture is one of the key aspects to ensure battery safety, reliability, and lifespan. Excessive residual moisture inside the battery not only accelerates electrolyte decomposition and causes electrode material corrosion, but can also lead to battery swelling, performance degradation, and even safety hazards. Therefore, the drying process has become an indispensable and crucial step in the lithium battery production process.

[0003] Currently, most battery drying equipment on the market is non-contact hot air circulation drying equipment. This type of equipment typically heats air to create hot air, which circulates within the drying oven, heating the battery surface through convection heat transfer to evaporate and remove moisture. For example, existing technologies (such as CN218565922U) achieve hot air circulation by setting up air inlet and outlet channels; patents such as CN218722883U and CN222069132U also use hot air blowing for battery drying. These non-contact solutions, to a certain extent, meet the drying needs of conventional square or cylindrical batteries.

[0004] However, for battery products with special curvature structures, such as curved batteries (e.g., curved lithium-ion batteries), non-contact hot air drying methods have significant limitations: hot air struggles to achieve uniform and efficient heat exchange on the curved surface, resulting in low heat transfer efficiency and significantly prolonged drying time. Simultaneously, maintaining prolonged, high-flow-rate hot air circulation leads to high energy consumption and operating costs, hindering energy conservation and efficiency improvements in large-scale production. Furthermore, existing equipment often lacks rapid and precise positioning and changeover mechanisms when dealing with different models of curved batteries, further impacting the flexibility and overall efficiency of the production line. Utility Model Content

[0005] The purpose of this invention is to provide an arc-shaped battery contact drying device to solve the technical problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an arc-shaped battery contact drying device, including a drying chamber, a drying chamber door and a vacuum extraction port, and also including a battery heating plate assembly, wherein the battery heating plate assembly can be placed inside the cavity of the drying chamber; The drying chamber is equipped with a heating probe and a flexible pin. The battery heating plate assembly includes a battery heating plate and a battery carrier placed thereon. The battery heating plate is provided with heating contacts that are electrically connected to the heating probe, and a locking hole that is inserted into the elastic pin. The battery carrier is provided with a carrier groove for accommodating the arc-shaped battery.

[0007] Preferably, the battery heating plate is provided with a battery carrier positioning pin, and the battery carrier is provided with a battery carrier positioning hole that corresponds to and engages with the battery carrier positioning pin.

[0008] Preferably, the battery heating plate assembly further includes a handle disposed on the battery heating plate.

[0009] Preferably, the shape of the carrier groove matches the outer contour of the arc-shaped battery.

[0010] Preferably, both the battery heating plate and the battery carrier are made of a metal thermally conductive material.

[0011] Preferably, the vacuum extraction port is used to connect to an external vacuum pipe.

[0012] Preferably, the vacuum extraction port is also used to introduce dry gas or nitrogen to break the vacuum.

[0013] The beneficial effects of this invention are as follows: This patent combines contact heating with a vacuum environment to achieve efficient and uniform drying of curved batteries. Compared to traditional non-contact hot air circulation, this device significantly improves heat transfer efficiency through direct heat conduction between the battery carrier and the heating plate, reducing drying time by approximately 4 hours and increasing overall efficiency by 50%. Simultaneously, the battery carrier serves as a replaceable tooling, and quick positioning and locking are achieved through locating pins / holes, eliminating the need for bolts and reducing changeover time by 30%. This lowers tooling costs, enhances equipment production flexibility and operational convenience, and the overall structure is simple and reliable, making it suitable for large-scale production applications. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 yes Figure 1 Schematic diagram of the internal structure of the medium-sized drying oven cavity; Figure 3 This is an exploded structural diagram of the battery heating plate assembly; Figure 4 This is a perspective view of the battery heating plate in this utility model; Figure 5 This is a perspective view of the battery carrier in this utility model; Figure 6 This is a schematic diagram of an arc-shaped battery. Detailed Implementation

[0015] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0016] like Figures 1 to 4 As shown, the present invention provides an arc-shaped battery contact drying device, which mainly includes a drying chamber 1, a drying chamber door 2, a battery heating plate assembly 3, and a vacuum extraction port 4.

[0017] The drying chamber 1 forms a sealed drying cavity, inside which a heating probe 1-1 and an elastic pin 1-2 are provided. The heating probe 1-1 is electrically connected to an external power supply and temperature control system (not shown in the figure) for conducting electrical energy. The elastic pin 1-2 is preferably a spring plunger, which can retract when pressed and pop out when the pressure is released, serving a positioning and locking function.

[0018] The battery heating plate assembly 3, as a core component, can be placed entirely into the cavity of the drying chamber 1. It mainly consists of a battery heating plate 3-1, a battery carrier 3-2, a handle 3-3, and heating contacts 3-4. The battery heating plate 3-1 integrates heating elements (such as heating wires), and its surface is provided with heating contacts 3-4. When the battery heating plate assembly 3 is pushed into the drying chamber 1, the heating contacts 3-4 must maintain stable contact with the heating probe 1-1 inside the chamber to achieve power transmission. Simultaneously, the battery heating plate 3-1 also has a locking hole 3-1-2. When the assembly is in place, the elastic pin 1-2 inside the chamber springs into the locking hole, thereby restricting the movement of the assembly within the cavity and ensuring reliable electrical connection and fixed position.

[0019] The battery carrier 3-2 is placed on the battery heating plate 3-1, and the two are precisely and quickly assembled through a positioning structure. Specifically, the battery heating plate 3-1 is provided with a battery carrier positioning pin 3-1-1, and the corresponding position of the battery carrier 3-2 is provided with a battery carrier positioning hole 3-2-1. During assembly, simply align the positioning hole with the positioning pin and place the battery down; no bolts are required, achieving millisecond-level replacement. The upper surface of the battery carrier 3-2 is machined with at least one carrier groove 3-2-2. The shape of this groove matches the outer contour of the arc-shaped battery to be dried, ensuring that the battery can be stably placed flat within it, achieving maximum contact area. Both the battery heating plate 3-1 and the battery carrier 3-2 are preferably made of metal materials with good thermal conductivity, such as aluminum alloy, to ensure that heat can be efficiently transferred from the heating plate to the battery.

[0020] The vacuum extraction port 4 is located on the drying chamber 1 and is used to connect to the vacuum pipeline of the production workshop during the drying stage to evacuate the chamber to the negative pressure state required by the process, so as to lower the boiling point of water and accelerate the evaporation of moisture. After drying, dry air or nitrogen can also be introduced into the chamber through this port to break the vacuum and facilitate the opening of the drying chamber door 2.

[0021] The handle 3-3 is installed on the side of the battery heating plate 3-1, making it convenient for operators to move the entire battery heating plate assembly 3.

[0022] The working process of this utility model is as follows: The battery carrier 3-2, suitable for the current product model, is installed onto the battery heating plate 3-1 through the engagement of the positioning pin 3-1-1 and the positioning hole 3-2-1. Then, the arc-shaped batteries are placed one by one into the respective carrier grooves 3-2-2 of the battery carrier 3-2.

[0023] The operator pushes the entire battery heating plate assembly 3, with the battery loaded, into the cavity of the drying chamber 1 using handle 3-3, ensuring that the heating contact 3-4 is in full contact with the heating probe 1-1. During this process, the elastic pin 1-2 is compressed and automatically springs into the locking hole 3-1-2, completing the locking. The oven door 2 is then closed.

[0024] The battery heating plate 3-1 is heated by an external temperature control system, and the heat is directly conducted to the arc-shaped battery casing via the battery carrier 3-2 for contact heating. Simultaneously, a vacuum is created in the cavity through the vacuum extraction port 4 to maintain a negative pressure environment. Under these conditions, the moisture inside the battery is rapidly heated and evaporated.

[0025] After the preset drying time is reached, heating is stopped. Drying gas is then introduced into the chamber through the vacuum port 4 to restore the internal pressure to normal. The oven door 2 is opened, releasing the locking mechanism of the elastic pins 1-2, allowing the operator to pull out the battery heating plate assembly 3 and remove the dried batteries.

[0026] The above embodiments illustrate that this utility model significantly improves the drying efficiency of arc-shaped batteries by combining contact heat conduction with vacuum assistance; the design of the positioning pin / hole and the elastic pin locking hole enables rapid, precise tooling change and reliable fixation. Those skilled in the art will understand that various modifications can be made to the above specific embodiments without departing from the core concept of this utility model, such as using different internal heating methods of the heating plate, changing the number and layout of the positioning pins, or adjusting the arrangement of the carrier grooves, etc., and these modifications should all be considered to fall within the protection scope of this utility model.

Claims

1. An arc-shaped battery contact drying device, comprising a drying chamber (1), a drying door (2), and a vacuum extraction port (4), characterized in that, It also includes a battery heating plate assembly (3), which can be placed inside the cavity of the drying chamber (1); The drying chamber (1) is equipped with a heating probe (1-1) and an elastic pin (1-2). The battery heating plate assembly (3) includes a battery heating plate (3-1) and a battery carrier (3-2) placed thereon. The battery heating plate (3-1) is provided with heating contacts (3-4) that are electrically connected to the heating probe (1-1) and locking holes (3-1-2) that are inserted into the elastic pin (1-2). The battery carrier (3-2) is provided with a carrier groove (3-2-2) for accommodating the arc-shaped battery.

2. The arc-shaped battery contact drying device according to claim 1, characterized in that, The battery heating plate (3-1) is provided with a battery carrier positioning pin (3-1-1), and the battery carrier (3-2) is provided with a battery carrier positioning hole (3-2-1) that is inserted and engaged with the battery carrier positioning pin (3-1-1).

3. The arc-shaped battery contact drying device according to claim 1, characterized in that, The battery heating plate assembly (3) also includes a handle (3-3) disposed on the battery heating plate (3-1).

4. The arc-shaped battery contact drying device according to claim 1, characterized in that, The shape of the carrier groove (3-2-2) matches the outer contour of the arc-shaped battery.

5. The arc-shaped battery contact drying device according to claim 1, characterized in that, Both the battery heating plate (3-1) and the battery carrier (3-2) are made of thermally conductive metal materials.

6. The arc-shaped battery contact drying device according to claim 1, characterized in that, The vacuum extraction port (4) is used to connect to an external vacuum pipe.

7. The arc-shaped battery contact drying device according to claim 1, characterized in that, The vacuum extraction port (4) is also used to introduce dry gas or nitrogen to break the vacuum.

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