CN204085081U - A kind of lithium battery pole slice baking baking oven - Google Patents

Abstract

The utility model discloses a kind of lithium battery pole slice baking baking oven, comprise casing, shown cabinet wall is vacuum inwall, vacuum inwall is provided with two gas expansion shafts be oppositely arranged, described gas expansion shaft is used for fixing, transmission lithium battery pole slice, and described vacuum inwall top is provided with trace moisture sensor.The utility model adopts the mode of circulation unwinding and rewinding in the process of baking to lithium battery pole slice, pole piece internal moisture is fully discharged, and the flatulence risk after effective reduction lithium battery is shaping, improves product percent of pass; Simultaneously trace moisture sensor can pole piece moisture in real time on-line monitoring baking oven, and information is transmitted convenient and swift, can reach the object of efficent use of resources, raise labour productivity.

Description

An oven for baking lithium battery pole pieces

technical field

The utility model belongs to the field of battery manufacturing equipment and relates to an oven for baking pole pieces of lithium batteries.

Background technique

In the lithium battery production process, baking is one of the important links. The process usually involves powder baking, pole piece baking, and battery cell baking before liquid injection. The baking effect directly affects the later performance of the battery.

At present, the conventional method of baking the pole pieces of lithium batteries is to put the pole pieces directly into the oven after the winding is completed, and vacuumize and bake according to the pre-set time and temperature. When the baking time is up, it is over. After the temperature drops to room temperature, open the oven and take the surface pole pieces for moisture testing. This method not only takes a long time, but the moisture test has errors, and the whole roll of pole pieces is tightly wound, and internal pole pieces will inevitably appear during the baking process. The poor baking effect brings great hidden dangers to the performance of the final battery.

Utility model content

The technical problem to be solved by the utility model is to provide an oven for baking lithium battery pole pieces.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

An oven for baking lithium battery pole pieces, including a box body, the inner wall of the shown box is a vacuum inner wall, and two oppositely arranged inflatable shafts are installed on the vacuum inner wall, and the inflatable shafts are used to fix and transport lithium batteries A pole piece, a trace moisture sensor is installed on the top of the vacuum inner wall.

The winding length of the lithium battery pole piece is determined according to the height of the vacuum inner wall, and the total winding length of the lithium battery pole piece = the theoretical total length + 1-1.5m, and the diameter of the lithium battery pole piece after winding is 5-10cm smaller than the height of the vacuum inner wall.

The time required for 1/2 cycle of rewinding and unwinding of the lithium battery pole piece=theoretical total length/rotational speed of the inflatable shaft.

After the lithium battery pole piece completes the 1/2 cycle time, the inflatable axis automatically starts the reverse procedure.

After the moisture value detected by the trace moisture sensor reaches the set value, the air-expanding shaft will automatically stop after completing the winding and unwinding action.

The beneficial effects of the utility model are: the utility model adopts a cyclic winding and unwinding method for the lithium battery pole piece during the baking process, so that the moisture inside the pole piece can be fully discharged, effectively reducing the risk of flatulence after the lithium battery is formed, and improving Product qualification rate; at the same time, the trace moisture sensor can monitor the moisture of the pole piece in the oven in real time online, and the information transmission is convenient and fast, which can achieve the purpose of effectively utilizing resources and improving labor productivity.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Fig. 1 is the structural representation of the utility model.

In the figure, 1-cabinet, 2-vacuum inner wall, 3-inflatable shaft, 4-lithium battery pole piece, 5-trace moisture sensor.

Detailed ways

As shown in Figure 1, an oven for baking lithium battery pole pieces includes a box body 1, a vacuum inner wall 2 inside the box body 1, and two air expansion shafts 3 are installed on the vacuum inner wall 2, and the air expansion shafts 3 is used for fixedly conveying the pole piece 4 of the lithium battery, and a trace moisture sensor 5 is installed on the top of the vacuum inner wall 2 .

When working, put the whole roll of lithium battery pole piece 4 into the vacuum box 1 and fix it on one of the inflatable shafts 3. One end of the lithium battery pole piece 4 is connected to the other inflatable shaft 3. After confirming that the preparation work is completed, Start the oven according to the pre-set program, and the inflatable shaft 3 starts to rotate with the lithium battery pole piece 4. After reaching 1/2 cycle time, the inflatable shaft 3 automatically starts to reverse, and the lithium battery pole piece 4 is continuously rotated during the process. It is rewound and unwound to achieve the purpose of being cycled and baked. During the process, the trace moisture sensor 5 will monitor the moisture content of the lithium battery pole piece 4 in the box 1 in real time.

When the moisture value reaches the standard set by the process, the oven will automatically recognize it, and the inflatable shaft 3 will carry the lithium battery pole piece 4 to complete the winding and unwinding action and stop automatically. After the temperature in the box 1 drops to room temperature Finally, the lithium battery pole piece 4 is taken out and transferred to the next procedure. The winding length of the lithium battery pole piece 4 is determined according to the height of the vacuum inner wall 2, and the total winding length of the lithium battery pole piece 4 = theoretical total length + 1-1.5m, and the diameter of the pole piece after winding is 5-10cm smaller than the height of the vacuum inner wall. The time required for 1/2 cycle of rewinding and unwinding of the lithium battery pole piece 4 = theoretical total length / 3 speeds of the inflatable shaft. After the lithium battery pole piece 4 completes the 1/2 cycle time, the inflatable shaft 3 automatically starts the reversing procedure. After the moisture value detected by the trace moisture sensor 5 reaches the set value, the inflatable shaft 3 will automatically stop after completing the winding and unwinding action.

Claims (2)

1. An oven for baking lithium battery pole pieces, characterized in that it includes a box (1), the inner wall of the box (1) shown is a vacuum inner wall (2), and the vacuum inner wall (2) is equipped with a relatively set Two inflatable shafts (3), the inflatable shafts (3) are used to fix and transport the lithium battery pole piece (4), and a trace moisture sensor (5) is installed on the top of the vacuum inner wall (2). 2. The oven for lithium battery pole piece baking according to claim 1, characterized in that the winding length of the lithium battery pole piece (4) is determined according to the height of the vacuum inner wall (2), and the lithium battery pole piece The total length of the sheet (4) after winding = the theoretical total length + 1-1.5m, and the diameter of the lithium battery pole piece (4) after winding is 5-10cm smaller than the height of the vacuum inner wall.