Baking and heating device for large cylindrical battery cell

Abstract

The utility model discloses a baking and heating device for a large cylindrical battery cell, which is characterized by comprising a lifting mechanism arranged above a fixed tray of a baking and heating furnace, a heating rod is vertically hung at the lifting end of the lifting mechanism, and the diameter of the heating rod is smaller than that of a central hole of the battery cell to be heated. And the length is greater than that of the to-be-heated battery cell. The device has the advantages that the internal temperature of the whole battery cell can be uniformly distributed, the heating time is favorably shortened, the production efficiency is improved and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a baking and heating device for a large cylindrical battery core. Background Art

[0002] The rapid development of the new energy industry has led to the development of battery cell structures of different sizes and shapes. Currently, large cylindrical battery cells are gradually becoming the mainstream products of the new energy industry, and high quality and high production capacity will gradually develop rapidly. At present, large cylindrical battery cells generally use the bottom heating method in the baking and heating production process. This baking and heating method has uneven heat distribution, and the bottom temperature is significantly higher than the middle and top of the battery cell. In addition, the heating time is also longer, and the production efficiency is low. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide a baking and heating device that can make the temperature inside the entire battery core evenly distributed, thereby shortening the heating time and improving production efficiency.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A baking and heating device for large cylindrical battery cells, characterized in that it comprises a lifting mechanism arranged above a fixed tray of a baking and heating furnace, a heating rod being vertically suspended at the lifting end of the lifting mechanism, the diameter of the heating rod being smaller than the diameter of the center hole of the battery cell to be heated, and the length of the heating rod being greater than the length of the battery cell to be heated.

[0006] By adopting the above structure, the battery cell to be heated is placed on the fixed tray of the baking heating furnace, the heating rod is aligned with the center hole of the battery cell, and the heating rod is driven downward by the lifting mechanism until the lower end of the heating rod reaches the bottom of the battery cell. While the baking heating furnace heats the bottom of the battery cell, the heating rod generates heat to heat the middle of the battery cell, so that the temperature inside the battery cell is evenly distributed, thereby shortening the heating time and improving production efficiency.

[0007] Furthermore, a temperature sensor is provided at the lower end of the heating rod.

[0008] In this way, the temperature at the bottom of the battery cell can be detected by the temperature sensor, so that the control system can adjust the heating temperature of the heating rod according to the temperature detected by the temperature sensor.

[0009] Furthermore, the temperature sensor is a thermistor sensor.

[0010] Furthermore, at least two lifting mechanisms are arranged side by side in a transverse direction, and the lifting ends of two adjacent lifting mechanisms are connected to a horizontally arranged beam. The heating rod is suspended at the lower end of the beam, and at least two heating rods are equidistantly arranged along the length direction of the beam.

[0011] In this way, multiple heating rods can be set through the crossbeam to meet the needs of heating multiple battery cells at the same time, which is conducive to improving production efficiency.

[0012] Furthermore, the lifting end of the lifting mechanism has an in-position sensor arranged downward, and the in-position sensor is close to the heating rod.

[0013] Furthermore, the heating rod is an induction resistance heating rod.

[0014] Furthermore, the lifting mechanism is a vertically arranged servo electric cylinder.

[0015] The servo electric cylinder is a modular product that integrates the servo motor and the lead screw. Its speed is 0.1~2m / s. Because of the closed-loop servo control, the control accuracy is high, and it has the characteristics of low cost and flexible configuration.

[0016] In summary, the utility model has the advantages of being able to make the temperature inside the entire battery core evenly distributed, which is beneficial to shortening the heating time and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the state of the heating device of this embodiment before heating.

[0018] Figure 2 It is a schematic diagram of the heating state of the heating device of this embodiment. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the embodiments.

[0020] When implementing: Figure 1 As shown, a baking and heating device for a large cylindrical battery cell comprises a lifting mechanism 1 arranged above a fixed tray of a baking and heating furnace, a heating rod 2 is vertically suspended at the lifting end of the lifting mechanism 1, the diameter of the heating rod 2 is smaller than the diameter of the central hole of the battery cell to be heated, and the length is greater than the length of the battery cell to be heated. In this embodiment, the lifting mechanism 1 is a servo electric cylinder, and the heating rod 2 is an induction resistor heating rod. A temperature sensor 3 is arranged at the lower end of the heating rod 2, and the temperature sensor 3 is a thermistor sensor. In this way, the temperature at the bottom of the battery cell can be detected by the temperature sensor, so that the control system can adjust the heating temperature of the heating rod according to the temperature detected by the temperature sensor.

[0021] At least two lifting mechanisms 1 are arranged side by side in a lateral direction, and the lifting ends of two adjacent lifting mechanisms 1 are connected to a horizontally arranged crossbeam 4. The heating rod 2 is suspended at the lower end of the crossbeam 4, and at least two heating rods 2 are arranged equidistantly along the length direction of the crossbeam 4. The crossbeam 4 has an in-position sensor 5 arranged downward, and the in-position sensor 5 is arranged one by one with the heating rod 2 and is close to the heating rod 2.

[0022] By adopting the above structure, the battery cell to be heated is placed on the fixed tray of the baking heating furnace, the heating rod is aligned with the center hole of the battery cell, and the heating rod is driven downward by the lifting mechanism until the lower end of the heating rod reaches the bottom of the battery cell. While the baking heating furnace heats the bottom of the battery cell, the heating rod generates heat to heat the middle of the battery cell, so that the temperature inside the battery cell is evenly distributed, thereby shortening the heating time and improving production efficiency.

[0023] In specific implementation, in order to prevent the heating rod from contacting the center hole of the battery cell and damaging the battery cell, a convex ridge made of heat-resistant rubber can be provided on the surface of the heating rod along the length direction, and 3 to 4 convex ridges are evenly distributed along the circumference. This can reduce the damage of the heating rod to the center hole of the battery cell. The heat-resistant rubber can be borosilicate rubber, which can work for a long time at 350°C.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A baking and heating device for a large cylindrical battery cell, characterized in that: The invention comprises a lifting mechanism (1) arranged above a fixed tray of a baking heating furnace, a heating rod (2) being vertically suspended at the lifting end of the lifting mechanism (1), the diameter of the heating rod (2) being smaller than the diameter of the central hole of the electric core to be heated, and the length being larger than the length of the electric core to be heated; a temperature sensor (3) being arranged at the lower end of the heating rod (2); a downwardly arranged in-position sensor (5) being provided at the lifting end of the lifting mechanism (1), the in-position sensor (5) being close to the heating rod (2); and the lifting mechanism (1) being a vertically arranged servo electric cylinder.

2. The baking and heating device according to claim 1, characterized in that: The temperature sensor (3) is a thermistor sensor.

3. The baking and heating device according to claim 1, characterized in that: At least two lifting mechanisms (1) are arranged in parallel and spaced apart in the transverse direction, and the lifting ends of two adjacent lifting mechanisms (1) are connected to a horizontally arranged crossbeam (4), and at least two heating rods (2) are suspended at the lower end of the crossbeam (4), and are equidistantly arranged along the length direction of the crossbeam (4).

4. The baking and heating device according to claim 1, characterized in that: The heating rod (2) is an induction resistance heating rod.

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