Nitrogen heating device for battery cell preparation drying oven

Abstract

The utility model discloses a battery cell preparation drying oven nitrogen heating device which comprises an external gas inlet assembly and a heating assembly located in the gas inlet assembly, and the gas inlet assembly is connected with a drying oven through a pipeline. The air inlet assembly comprises a semicircular upper air inlet pipeline and a semicircular lower air inlet pipeline, the upper air inlet pipeline and the lower air inlet pipeline are provided with an upper air inlet cavity and a lower air inlet cavity respectively, and the heating assembly is detachably arranged in a cavity formed by the upper air inlet pipeline and the lower air inlet pipeline. Nitrogen enters the drying oven through the gas inlet assembly to be used for breaking vacuum, before the nitrogen is introduced into the drying oven, the nitrogen is heated through the heating assembly so that the temperature of the nitrogen can be matched with the temperature in the drying oven, the problem of cavity temperature loss caused by introduction of low-temperature nitrogen is solved, the cavity does not need to be heated after introduction of the nitrogen, and the heating efficiency is improved. And the effect of shortening the baking time is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen heating, and more specifically, to a nitrogen heating device for a cell preparation oven. Background Art

[0002] In the baking process of lithium batteries, the nitrogen gas filled in the breathing cycle vacuum breaking step will cause the temperature in the cavity to drop, prolong the baking time, and reduce the equipment efficiency. Because the nitrogen gas used for vacuum breaking is about 23°C, while the working temperature requirement of the oven is about 85°C, the filled nitrogen gas will inevitably cause heat loss in the cavity. At this time, the heating plate in the cavity needs to be turned on to heat the cavity to the required working temperature. This process takes about 3 - 5 minutes. The lithium battery baking process currently requires about 10 breathing cycles in the industry, and the entire baking process increases by about 30 - 50 minutes due to heat loss, affecting the equipment usage efficiency. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a nitrogen heating device for a cell preparation oven to solve the technical problems existing in the above background art.

[0004] The technical solution of the utility model provides a nitrogen heating device for a cell preparation oven, which includes an external air inlet component and a heating component located inside the air inlet component, and the air inlet component is connected to the oven through a pipeline.

[0005] The air inlet component includes a semi-circular upper air inlet pipeline and a semi-circular lower air inlet pipeline. An upper air inlet cavity and a lower air inlet cavity are respectively arranged on the upper air inlet pipeline and the lower air inlet pipeline, and the heating component is detachably arranged in the cavity formed by the upper air inlet pipeline and the lower air inlet pipeline.

[0006] In a preferred embodiment, the heating component includes an electric heating tube module, and the electric heating tube module is arranged in a ring shape.

[0007] In a preferred embodiment, a support rod and an arc-shaped support block connected to the support rod are arranged on the electric heating tube module, and an arc-shaped limiting groove is arranged on the inner surface of the lower air inlet pipeline, and the arc-shaped support block is inserted into the arc-shaped limiting groove.

[0008] In a preferred embodiment, a wiring hole is penetrated through the upper air inlet pipeline.

[0009] In a preferred embodiment, temperature sensors are arranged on both the upper air inlet pipeline and the lower air inlet pipeline, and the temperature sensors are close to the air outlet end.

[0010] In a preferred embodiment, circular sealing plates are arranged at both ends of the lower air inlet pipeline.

[0011] In a preferred embodiment, a check valve is provided on the pipeline on the side connected to the oven.

[0012] The beneficial effects of the technical solution of the present utility model are as follows:

[0013] Nitrogen enters the oven through the air inlet assembly for breaking vacuum. Before the nitrogen is introduced into the oven, the nitrogen is heated by the heating assembly so that the temperature of the nitrogen is adapted to the temperature inside the oven, solving the problem of temperature loss of the cavity caused by the introduction of low-temperature nitrogen, and there is no need to heat the cavity after the nitrogen is introduced, which plays a role in shortening the baking time. Description of the Drawings

[0014] Figure 1 It is a connection diagram of the nitrogen heating device of the present utility model and the oven.

[0015] Figure 2 It is an exploded view of the structure of the nitrogen heating device of the present utility model.

[0016] Figure 3 It is another exploded view of the structure of the nitrogen heating device of the present utility model.

[0017] Figure 4 It is a cross-sectional view of the upper air inlet pipeline of the present utility model.

[0018] Description of the reference numerals: 1 upper air inlet pipeline, 2 lower air inlet pipeline, 3 upper air inlet cavity, 4 lower air inlet cavity, 5 electric heating tube module, 6 wiring hole, 7 support rod, 8 arc-shaped support block, 9 arc-shaped limiting groove, 10 temperature sensor, 11 circular sealing plate, 12 check valve, 13 oven. Detailed Description of the Embodiment

[0019] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments. The embodiments of the present utility model are given for the convenience of illustration and description, and are not exhaustive or limited to the disclosed form. Many modifications and variations will be obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present utility model, and enable those of ordinary skill in the art to understand the present utility model and thus design various embodiments with various modifications suitable for specific purposes.

[0020] As Figures 1-4As shown in the figure, the technical solution of the present utility model provides a nitrogen heating device for a lithium battery oven 13, including an external air intake component and a heating component located inside the air intake component. The air intake component is connected to the oven 13 through a pipeline, and a check valve 12 is provided on the pipeline on the side connected to the oven to prevent gas backflow. Nitrogen enters the oven 13 through the air intake component for breaking vacuum. Before the nitrogen is introduced into the oven 13, the heating component heats the nitrogen to make the temperature of the nitrogen match the temperature inside the oven 13, solving the problem of chamber temperature loss caused by the introduction of low-temperature nitrogen, and there is no need to heat the chamber after the nitrogen is introduced, which plays a role in shortening the baking time.

[0021] The air intake component includes a semi-circular upper air intake pipeline 1 and a semi-circular lower air intake pipeline 2. An upper air intake chamber 3 and a lower air intake chamber 4 are respectively provided on the upper air intake pipeline 1 and the lower air intake pipeline 2. The heating component is detachably arranged in the cavity formed by the upper air intake pipeline 1 and the lower air intake pipeline 2. The upper air intake pipeline 1 and the lower air intake pipeline 2 can be spliced into a circular air intake pipeline. The splicing method is convenient for the placement and removal of the heating component. The heating component is placed in the cavity formed by the two. Compared with setting the heating component outside the air intake component, the air intake component plays a certain heat preservation role for the heating component, thereby ensuring the heating effect.

[0022] The heating component includes an electric heating tube module 5. The electric heating tube module 5 is arranged in a ring shape, and a wiring hole 6 is penetrated on the upper air intake pipeline 1. After the electric heating tube module 5 is powered on, it generates heat to realize the heating of the nitrogen in the upper air intake pipeline 1 and the lower air intake pipeline 2. The ring shape makes the heating inside the pipeline more uniform.

[0023] A support rod 7 and an arc-shaped support block 8 connected to the support rod 7 are provided on the electric heating tube module 5. An arc-shaped limit groove 9 is provided on the inner surface of the lower air intake pipeline 2, and the arc-shaped support block 8 is inserted into the arc-shaped limit groove 9. The electric heating tube module 5 is fixed by the cooperation of the arc-shaped support block 8 and the arc-shaped limit groove 9. The plug-in fixing method is convenient for installation and later disassembly and maintenance.

[0024] Temperature sensors 10 are provided on both the upper air intake pipeline 1 and the lower air intake pipeline 2, and the temperature sensors 10 are close to the air outlet end. By monitoring the temperature of the nitrogen in the upper air intake chamber 3 and the lower air intake chamber 4 through the temperature sensors 10, the heating of the heating component is regulated to control the temperature of the nitrogen to match the temperature of the oven 13.

[0025] Circular sealing plates 11 are provided at both ends of the lower air intake pipeline 2. After the upper air intake pipeline 1 and the lower air intake pipeline 2 are assembled, the circular sealing plates 11 block the cavity for placing the heating component. On the one hand, it prevents the introduced nitrogen from entering the cavity, and on the other hand, it avoids heat loss.

[0026] Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art and related fields based on the embodiments in the present utility model without creative efforts shall fall within the scope of protection of the present utility model. Structures, devices, and operation methods not specifically described and explained in the present utility model shall be implemented by conventional means in the art without special instructions and limitations.

Claims

1. A nitrogen heating device for a battery cell preparation oven, characterized in that: It includes an external air intake assembly and a heating assembly located inside the air intake assembly, wherein the air intake assembly is connected to the oven through a pipeline; The air intake assembly includes a semicircular upper air intake duct and a semicircular lower air intake duct, and an upper air intake cavity and a lower air intake cavity are respectively provided on the upper air intake duct and the lower air intake duct. The heating assembly is detachably arranged in the cavity formed by the upper air intake duct and the lower air intake duct.

2. A nitrogen heating device for a battery cell preparation oven according to claim 1, characterized in that: The heating assembly comprises an electric heating tube module, and the electric heating tube module is arranged in a ring shape.

3. A nitrogen heating device for a battery cell preparation oven according to claim 2, characterized in that: The electric heating tube module is provided with a support rod and an arc-shaped support block connected to the support rod, and the inner surface of the lower air inlet pipe is provided with an arc-shaped limiting groove, and the arc-shaped support block is inserted into the arc-shaped limiting groove.

4. The nitrogen heating device for a battery cell preparation oven according to claim 1, characterized in that: The upper air intake pipe is provided with a wiring hole.

5. The nitrogen heating device for a battery cell preparation oven according to claim 1, characterized in that: The upper air inlet pipe and the lower air inlet pipe are both provided with temperature sensors, and the temperature sensors are close to the air outlet end.

6. The nitrogen heating device for a battery cell preparation oven according to claim 1, characterized in that: Circular sealing plates are arranged at both ends of the lower air inlet pipe.

7. The nitrogen heating device for a battery cell preparation oven according to claim 1, characterized in that: A check valve is provided on the pipe connected to the oven.

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