Large-cavity battery cell vacuum drying furnace

Abstract

The utility model relates to a large-cavity battery cell vacuum drying furnace which comprises a furnace body, a furnace door assembly moving left and right, a vacuumizing assembly, a vacuum breaking assembly, electric heating plates and battery cell clamps, the electric heating plates are fixedly arranged on horizontal partition plates of each layer, and each battery cell clamp comprises a frame, a vertical partition plate and a bottom supporting strip. The vertical partition plates and the bottom supporting strips are fixed on the frame, the vertical partition plates are used for dividing battery cells into a plurality of rows, the bottom supporting strips are used for supporting the two ends of the bottoms of the battery cells, and when the battery cell clamp is placed in the clamp placing position, the electric heating plate is used for performing contact type heating on the bottoms of the battery cells. The battery cell clamp does not have a heating function any more and only has a battery cell bearing function, and the electric heating plate is fixedly arranged on the horizontal partition plate in the furnace body and does not need to go in and out along with the battery cell clamp, so that the self weight of the battery cell clamp is reduced, and the battery cell clamp can be carried only by a six-axis robot or an AGV (Automatic Guided Vehicle) with relatively low power; the equipment cost of the drying line is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery core heating equipment, and in particular to a large-cavity battery core vacuum drying furnace. Background Art

[0002] During the battery manufacturing process, bare cells need to be heated and dried to remove moisture from the cells. The Chinese utility model patent with publication number CN220931518U discloses a high-capacity vacuum chamber mechanism, which adopts a left-right door assembly structure with good sealing performance, and can maintain a high vacuum environment in the chamber. The battery fixture is used to carry multiple cells, and an electric heating plate is provided on the battery fixture. The electric heating plate is in direct contact with the cell for heating, and the drying efficiency is high. A lifting mechanism is provided between the battery fixture and the chamber to achieve quick plug-in and disconnection.

[0003] A Chinese utility model patent with publication number CN217275476U discloses a heating fixture for drying square battery cells and a battery cell drying furnace. The heating fixture needs to be transported by an AGV when entering and exiting the drying furnace. The heating fixture is provided with a bottom heating plate and a side heating plate. It is heavy and needs to be equipped with a high-power AGV, which is costly and needs to be improved. Utility Model Content

[0004] In order to solve the technical problem in the prior art that the heating fixture of the battery cell drying furnace is heavy and needs to be equipped with a high-power AGV, the present application provides a large-cavity battery cell vacuum drying furnace.

[0005] The technical solution provided in the present application is as follows: A large-cavity battery cell vacuum drying furnace, comprising a furnace body, a furnace door assembly that moves left and right, a vacuum extraction assembly and a vacuum breaking assembly, wherein the furnace body is provided with a first cavity and a second cavity arranged in parallel left and right, the first cavity and the second cavity are both provided with a plurality of horizontal partitions, and the first cavity and the second cavity are provided with multiple layers of fixture positions, the furnace door assembly comprises a left furnace door and a right furnace door, which are respectively used to seal the first cavity and the second cavity, the drying furnace also comprises an electric heating plate and a battery cell fixture, the electric heating plate is fixedly arranged on the horizontal partition of each layer, the battery cell fixture comprises a frame, a vertical partition and a bottom support bar, the vertical partition and the bottom support bar are both fixed on the frame, the vertical partition is used to separate the battery cells into multiple rows, the bottom support bar is used to support the two ends of the bottom of the battery cell, and when the battery cell fixture is placed in the fixture position, the electric heating plate performs contact heating on the bottom of the battery cell.

[0006] By adopting the above technical solution: the battery cell clamp of the present application no longer has a heating function, but only has the function of carrying battery cells. The battery cell array is placed in the frame, and the bottom support bar can support the two ends of the bottom of the battery cell, so that most of the bottom surface of the battery cell is exposed, and this exposed area can be directly in contact with the electric heating plate for heating, and also has a higher thermal conductivity efficiency. Since the electric heating plate is fixedly set on the horizontal partition in the furnace body and does not need to follow the battery cell clamp in and out, the weight of the battery cell clamp itself is reduced, and only a small-power six-axis robot or AGV is needed to move in and out, thereby reducing the equipment cost of the drying line. In addition, there is no need to set a probe plate on the battery cell clamp, and only a temperature probe needs to be set on the electric heating plate, which further simplifies the structure of the battery cell clamp.

[0007] Preferably, a plurality of bosses are provided on the electric heating plate, and the bosses are respectively in contact with the bottom of each row of battery cells.

[0008] Preferably, the height of the boss is slightly greater than the height of the bottom support bar.

[0009] Preferably, the electric heating plate comprises an upper heat conducting plate, a lower heat conducting plate and an electric heating pipe, and the electric heating pipe is arranged between the upper heat conducting plate and the lower heat conducting plate.

[0010] Preferably, the electric heating tube is an S-shaped tube.

[0011] Preferably, a partition block is further provided on the vertical partition plate, and the partition block is used to separate the battery cells in each row.

[0012] Preferably, a guiding slope is provided at the top of the partition block.

[0013] Preferably, a plurality of supporting plates are provided on both sides of the battery cell fixture, and a triangular supporting block is provided between the supporting plates and the frame.

[0014] In summary, the present application includes at least one of the following beneficial technical effects:

[0015] 1. The battery cell clamp of the present application no longer has a heating function, but only has the function of carrying the battery cell. Its own weight is reduced, and the battery cell clamp only needs to be equipped with a low-power six-axis robot or AGV for transportation, thereby reducing the equipment cost of the drying line.

[0016] 2. The battery cell array is placed in the frame, and the bottom support bar can support the two ends of the bottom of the battery cell. Most of the bottom surface of the battery cell is exposed and can be directly heated by the electric heating plate, which also has high thermal conductivity efficiency.

[0017] 3. There is no need to set a probe plate on the battery cell fixture. Only a temperature probe needs to be set on the electric heating plate. The structure of the battery cell fixture is further simplified. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional diagram of a large-cavity battery cell vacuum drying furnace according to an embodiment of the present application;

[0019] Figure 2 It is a front view of the large-cavity battery cell vacuum drying furnace described in the embodiment of the present application;

[0020] Figure 3 It is a rear view of the large-cavity battery cell vacuum drying furnace described in the embodiment of the present application;

[0021] Figure 4 It is a side view of the large-cavity battery cell vacuum drying furnace described in the embodiment of the present application;

[0022] Figure 5 It is a schematic diagram of the internal structure of the large-cavity battery cell vacuum drying furnace described in the embodiment of the present application; Figure 6 It is a schematic diagram of the matching state of the electric heating plate and the battery cell clamp described in the embodiment of the present application;

[0023] Figure 7 It is a schematic diagram of the exploded state of the electric heating plate and the battery cell clamp described in the embodiment of the present application;

[0024] Figure 8 yes Figure 7 Enlarged view of point A in the middle;

[0025] Fig. 9 It is a schematic diagram of the exploded structure of the electric heating plate described in the embodiment of the present application.

[0026] Explanation of the accompanying drawings: 1. furnace body; 11. first cavity; 12. second cavity; 13. horizontal partition; 14. clamp position; 2. furnace door assembly; 21. left furnace door; 22. right furnace door; 3. vacuum assembly; 4. vacuum breaking assembly; 5. electric heating plate; 51. boss; 52. upper heat conduction plate; 53. lower heat conduction plate; 54. electric heating tube; 6. battery cell clamp; 61. frame; 611. support plate; 612. triangular support block; 62. vertical partition; 621. partition block; 622. guide ramp; 63. bottom support bar. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-9 This application is described in further detail.

[0028] Reference Figures 1 to 5The embodiment of the present application discloses a large-cavity battery cell vacuum drying furnace, including a furnace body 1, a furnace door assembly 2 that moves left and right, a vacuum assembly 3 and a vacuum breaking assembly 4. The furnace body 1 is provided with a first cavity 11 and a second cavity 12 arranged in parallel left and right. The first cavity 11 and the second cavity 12 are both provided with a plurality of horizontal partitions 13. The first cavity 11 and the second cavity 12 are provided with a multi-layer clamping position 14. The furnace door assembly 2 includes a left furnace door 21 and a right furnace door 22, which are used to seal the first cavity 11 and the second cavity 12 respectively. Since the above structure is the same as that in the CN220931518U patent, it will not be repeated here.

[0029] Reference Figure 5 The drying furnace also includes an electric heating plate 5 and a battery cell fixture 6. The electric heating plate 5 is fixedly arranged on the horizontal partition 13 of each layer. The battery cell fixture 6 includes a frame 61, a vertical partition 62 and a bottom support bar 63. The vertical partition 62 and the bottom support bar 63 are both fixed on the frame 61. The vertical partition 62 is used to separate the battery cells into multiple rows. The bottom support bar 63 is used to support the two ends of the bottom of the battery cell. When the battery cell fixture 6 is placed in the fixture position 14, the electric heating plate 5 performs contact heating on the bottom of the battery cell.

[0030] Reference Figure 7 , the electric heating plate 5 is provided with a plurality of bosses 51, and the bosses 51 are in contact with the bottom of each row of battery cells respectively. Since the bosses 51 have a certain height, they can penetrate into the bottom of the battery cell fixture 6 and directly contact the bottom of the battery cell to achieve contact heating. Preferably, the height of the bosses 51 is slightly greater than the height of the bottom support bar 63, so that the battery cell will be slightly lifted by the bosses 51, so that under the action of the gravity of the battery cell, the battery cell and the bosses 51 are in better contact, and the heat transfer effect is better.

[0031] Reference Fig. 9 The electric heating plate 5 includes an upper heat conducting plate 52, a lower heat conducting plate 53 and an electric heat pipe 54, and the electric heat pipe 54 is arranged between the upper heat conducting plate 52 and the lower heat conducting plate 53. The upper heat conducting plate 52 and the lower heat conducting plate 53 are generally made of aluminum alloy material with good thermal conductivity. Preferably, the electric heat pipe 54 is an S-shaped pipe, which can make the temperature of the upper heat conducting plate 52 and the lower heat conducting plate 53 more uniform in the entire plane.

[0032] Reference Figure 7 and Figure 8 , the vertical partition 62 is also provided with a partition block 621, and the partition block 621 is used to separate each row of battery cells. Adjacent battery cells will not be close to each other, because once the surface of the battery cells is close to each other, it will affect the evaporation of water and the drying effect will be poor. In order to better put the battery cells into the battery cell fixture 6, a guide slope 622 is especially provided at the top of the partition block 621, so that the battery cells can be guided to enter the battery cell fixture 6 smoothly when the robot is used for loading and unloading.

[0033] Reference Figure 7 A plurality of support plates 611 are provided on both sides of the battery clamp 6, and a triangular support block 612 is provided between the support plate 611 and the frame 61. The six-axis robot or AGV can hold the support plate 611 to transport the battery clamp 6, and the triangular support block 612 is used to increase the strength of the support plate 611.

[0034] The working process of this application is: first place the battery cells neatly into the battery cell fixture 6, then open the furnace door to the left and right, use a six-axis robot or AGV to move the battery cell fixture 6 into the drying furnace, and the electric heating plate 5 is provided with a positioning column, which can accurately position the battery cell fixture 6, so that the boss 51 on the electric heating plate 5 can accurately penetrate into the battery fixture without colliding with the frame 61 and the bottom support bar 63; after moving the battery cell fixture 6, open and close the furnace door. Then start to evacuate, the electric heating plate 5 starts to heat, set the appropriate vacuum degree and heating time according to the needs, and the heating process is completed automatically; after drying is completed, break the vacuum first, then open the furnace door, take out the battery cell fixture 6, then take out the battery cell from the battery cell fixture 6, and then repeat the above steps.

[0035] The implementation principle of the present application is as follows: the battery cell fixture 6 of the present application no longer has a heating function, but only has the function of carrying battery cells. The battery cell array is placed in the frame 61, and the bottom support bar 63 can support the two ends of the bottom of the battery cell, so that most of the bottom surface of the battery cell is exposed, and this exposed area can be directly in contact with the electric heating plate 5 for heating, and also has a high thermal conductivity. Since the electric heating plate 5 is fixedly set on the horizontal partition 13 in the furnace body 1, it does not need to follow the battery cell fixture 6 in and out, so the weight of the battery cell fixture 6 itself is reduced, and only a six-axis robot or AGV with lower power is needed to move in and out, which reduces the equipment cost of the drying line. In addition, there is no need to set a probe plate on the battery cell fixture 6, and only a temperature probe needs to be set on the electric heating plate 5, and the structure of the battery cell fixture 6 is further simplified.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A large-cavity battery cell vacuum drying furnace, comprising a furnace body (1), a furnace door assembly (2) movable left and right, a vacuum extraction assembly (3) and a vacuum breaking assembly (4), wherein the furnace body (1) is provided with a first cavity (11) and a second cavity (12) arranged side by side left and right, the first cavity (11) and the second cavity (12) are both provided with a plurality of horizontal partitions (13), the first cavity (11) and the second cavity (12) are provided with multi-layer clamping positions (14), the furnace door assembly (2) comprises a left furnace door (21) and a right furnace door (22), respectively used to seal the first cavity (11) and the second cavity (12), and characterized in that: The drying furnace also includes an electric heating plate (5) and a battery cell clamp (6), wherein the electric heating plate (5) is fixedly arranged on a horizontal partition (13) of each layer, and the battery cell clamp (6) includes a frame (61), a vertical partition (62) and a bottom support bar (63), wherein the vertical partition (62) and the bottom support bar (63) are both fixed on the frame (61), the vertical partition (62) is used to separate the battery cells into multiple rows, and the bottom support bar (63) is used to support the two ends of the bottom of the battery cell, and when the battery cell clamp (6) is placed in the clamp position (14), the electric heating plate (5) performs contact heating on the bottom of the battery cell.

2. The large-cavity battery core vacuum drying furnace according to claim 1, characterized in that: The electric heating plate (5) is provided with a plurality of bosses (51), and the bosses (51) are respectively in contact with the bottom of each row of battery cells.

3. The large cavity battery core vacuum drying furnace according to claim 2, characterized in that: The height of the boss (51) is slightly greater than the height of the bottom support bar (63).

4. The large cavity battery core vacuum drying furnace according to claim 1, characterized in that: The electric heating plate (5) comprises an upper heat conducting plate (52), a lower heat conducting plate (53) and an electric heating pipe (54); the electric heating pipe (54) is arranged between the upper heat conducting plate (52) and the lower heat conducting plate (53).

5. The large-cavity battery core vacuum drying furnace according to claim 4, characterized in that: The electric heating tube (54) is an S-shaped tube.

6. The large-cavity battery core vacuum drying furnace according to claim 5, characterized in that: The vertical partition (62) is also provided with a partition block (621), and the partition block (621) is used to separate the battery cells in each row.

7. The large-cavity battery core vacuum drying furnace according to claim 6, characterized in that: A guiding inclined surface (622) is provided at the top end of the partition block (621).

8. The large-cavity battery core vacuum drying furnace according to claim 6, characterized in that: A plurality of support plates (611) are provided on both sides of the battery cell fixture (6), and a triangular support block (612) is provided between the support plates (611) and the frame (61).

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