Heat dissipation device for cooling section of positive electrode material

Abstract

The utility model discloses a positive electrode material cooling section heat dissipation device which comprises a conveying device, a cover plate cooling cavity, a hearth pipeline cooling system and a hearth direct discharge cooling system, and the conveying device is arranged in the cover plate cooling cavity, the hearth pipeline cooling system and the hearth direct discharge cooling system. And the conveying device is used for conveying the saggar. According to the cooling section heat dissipation device for the positive electrode material, the positive electrode material on the conveying device is cooled at the same time through three different cooling modes including the cover plate cooling cavity, the hearth pipeline cooling system and the hearth direct discharge cooling system, the cooling speed is high, and different temperatures can be controlled and adjusted according to different positions; the positive electrode material is stably and uniformly cooled.

Description

TECHNICAL FIELD

[0001] The utility model belongs to lithium battery positive pole material production equipment technical field, concretely relates to a positive pole material cooling section heat abstractor. BACKGROUND

[0002] In the production process of lithium ion battery positive pole material, calcination is a key link. After high temperature calcination, the positive pole material needs to be handled reasonably to ensure that the crystal structure, physical performance and chemical performance of the material reach the best state, and poor cooling will also affect the processing of subsequent processes and the service life of equipment.

[0003] In the prior art, the traditional positive pole material calcination cooling mode generally adopts natural cooling mode, the cooling speed is slow, the production efficiency is low, and the cooling rate cannot be accurately controlled, resulting in poor performance consistency of the positive pole material. In addition, forced air cooling or water cooling cooling mode is also used, but this mode can speed up the cooling speed, but it is easy to cause uneven local temperature of the material, which may cause stress concentration in the material, and thus affect the quality and stability of the material. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a positive pole material cooling section heat abstractor to solve the problems of slow cooling rate and uneven cooling temperature in the prior art.

[0005] Therefore, the utility model provides a positive pole material cooling section heat abstractor, which comprises a conveying device, a cover plate cooling cavity, a hearth pipeline cooling system and a hearth direct discharge cooling system, the conveying device is arranged in the cover plate cooling cavity, the hearth pipeline cooling system and the hearth direct discharge cooling system, and the conveying device is used for conveying a sagger.

[0006] Preferably, the cover plate cooling cavity comprises an upper heat dissipation cover plate and a lower heat dissipation cover plate, the upper heat dissipation cover plate is arranged above the conveying device, the lower heat dissipation cover plate is arranged below the conveying device, and the upper heat dissipation cover plate and the lower heat dissipation cover plate are internally provided with a gas flow channel.

[0007] Preferably, one end of the upper heat dissipation cover plate is provided with an upper heat dissipation air inlet, and the other end is provided with an upper heat dissipation air outlet, one end of the lower heat dissipation cover plate is provided with a lower heat dissipation air inlet, and the other end is provided with a lower heat dissipation air outlet.

[0008] Preferably, a first rotor flowmeter is arranged at the upper heat dissipation air inlet and the lower heat dissipation air inlet.

[0009] Preferably, the hearth direct discharge cooling system comprises a hearth air inlet pipeline and a hearth air outlet general pipeline, the hearth air inlet pipeline is arranged below the conveying device, and the hearth air outlet general pipeline is arranged above the conveying device.

[0010] Preferably, the furnace inlet pipeline is provided with a second rotor flowmeter.

[0011] Preferably, the furnace exhaust manifold is provided with a furnace exhaust plug plate at the outlet thereof.

[0012] Preferably, the furnace pipeline cooling system comprises a plurality of groups of furnace convection cooling pipelines which are uniformly distributed along the conveying direction of the conveying device, the furnace convection cooling pipelines being above the conveying device and being communicated with the furnace exhaust manifold.

[0013] Preferably, the inlet directions of any two adjacent furnace convection cooling pipelines in each group of furnace convection cooling pipelines are opposite.

[0014] Preferably, the temperature sensor is uniformly arranged along the conveying direction of the conveying device.

[0015] Advantages:

[0016] The positive electrode material cooling section heat dissipation device provided by the utility model has the advantages that the positive electrode material on the conveying device is cooled through three different cooling modes of the cover plate cooling cavity, the furnace pipeline cooling system and the furnace direct discharge cooling system, the cooling speed is fast, different temperatures can be controlled and adjusted according to different positions, and the positive electrode material cooling is stable and uniform. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0018] Fig. 1 It is the front view of embodiment 1 of the positive electrode material cooling section heat dissipation device provided by the utility model.

[0019] Fig. 2 It is the left view of embodiment 1 of the positive electrode material cooling section heat dissipation device provided by the utility model.

[0020] 100 - conveying device, 200 - cover plate cooling cavity, 201 - upper heat dissipation cover plate, 202 - lower heat dissipation cover plate, 203 - upper heat dissipation air inlet, 204 - upper heat dissipation air outlet, 205 - lower heat dissipation air inlet, 206 - lower heat dissipation air outlet, 207 - first rotor flow meter, 300 - hearth pipeline cooling system, 301 - hearth convection heat dissipation pipeline, 400 - hearth direct discharge cooling system, 401 - hearth air inlet pipeline, 402 - hearth exhaust main pipeline, 403 - second rotor flow meter, 404 - hearth exhaust plug, 500 - temperature sensor. DETAILED DESCRIPTION

[0021] The content of the present application can be more easily understood by the following detailed description of the preferred embodiments of the present application and the examples included. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. When there is a conflict between the definitions in the specification and the definitions in the specification, the definitions in the specification shall prevail.

[0022] Example 1

[0023] Provided is a positive electrode material cooling section heat dissipation device as shown in Figs. 1-2 The positive electrode material cooling section heat dissipation device includes a conveying device 100, a cover plate cooling cavity 200, a hearth pipeline cooling system 300, and a hearth direct discharge cooling system 400. The conveying device 100 is inside the cover plate cooling cavity 200, the hearth pipeline cooling system 300, and the hearth direct discharge cooling system 400, and is used to transport the sagger.

[0024] The cover plate cooling cavity 200 includes an upper heat dissipation cover plate 201 and a lower heat dissipation cover plate 202. The upper heat dissipation cover plate 201 is above the conveying device 100, and the lower heat dissipation cover plate 202 is below the conveying device 100. The upper heat dissipation cover plate 201 and the lower heat dissipation cover plate 202 are internally provided with a gas flow channel. One end of the upper heat dissipation cover plate 201 is provided with an upper heat dissipation air inlet 203, and the other end is provided with an upper heat dissipation air outlet 204. One end of the lower heat dissipation cover plate 202 is provided with a lower heat dissipation air inlet 205, and the other end is provided with a lower heat dissipation air outlet 206. A first rotor flow meter 207 is arranged at the upper heat dissipation air inlet 203 and the lower heat dissipation air inlet 205. The upper heat dissipation cover plate 201 and the lower heat dissipation cover plate 202 are made of double-layer stainless steel material, and are internally provided with a back-shaped flow channel. Cold air is introduced into the upper heat dissipation cover plate 201 and the lower heat dissipation cover plate 202 through the upper heat dissipation air inlet 203 and the lower heat dissipation air inlet 205, and the air inlet amount of the cold air is controlled by the first rotor flow meter 207 to cool the upper and lower layers of the hearth at the same time.

[0025] The furnace direct discharge cooling system 400 comprises a furnace air inlet pipeline 401 and a furnace exhaust main pipeline 402. The furnace air inlet pipeline 401 is below the conveying device 100, and the furnace exhaust main pipeline 402 is above the conveying device 100. The furnace air inlet pipeline 401 is provided with a second rotor flowmeter 403. The furnace exhaust main pipeline 402 is provided with a furnace exhaust plugboard 404 at the outlet thereof. The furnace air inlet pipeline 401 and the furnace exhaust main pipeline 402 are made of stainless steel. Cold air is introduced into the furnace air inlet pipeline 401 and directly into the conveying device 100 to cool the saggar on the conveying device 100. Although the cooling speed of the saggar is fast, a large amount of lithium is precipitated from the material surface during the high-temperature process in the furnace due to the introduction of a large amount of gas, especially for lithium-rich manganese-based materials, which affects the quality of the material. Therefore, the air inlet flow and the exhaust valve need to be controlled according to the characteristics of different positive electrode materials to control the temperature of the furnace direct discharge cooling system 400.

[0026] The furnace pipeline cooling system 300 comprises a plurality of groups of furnace convection heat dissipation pipelines 301 which are uniformly distributed along the conveying direction of the conveying device 100. The furnace convection heat dissipation pipelines 301 are above the conveying device 100, and the furnace convection heat dissipation pipelines 301 are in communication with the furnace exhaust main pipeline 402. The air inlet directions of adjacent two furnace convection heat dissipation pipelines 301 in each group of furnace convection heat dissipation pipelines 301 are opposite. The furnace convection heat dissipation pipelines 301 are made of stainless steel and are cooled by the convective cold air. The cold air is discharged through the furnace exhaust main pipeline 402.

[0027] The temperature sensor 500 is also provided, which is uniformly arranged along the conveying direction of the conveying device 100. The temperature sensor 500 is optionally a thermocouple. The PID control algorithm is used to monitor the temperature change around the saggar in different cooling sections at any time. The air inlet flow of the cover plate cooling cavity 200, the furnace pipeline cooling system 300 and the furnace direct discharge cooling system 400 is accurately controlled through the cooling curve and the data fed back by the temperature sensor 500, so that the temperature in the cooling process is controllable, and the best discharge temperature effect is achieved.

[0028] The conveying device 100 is optionally a conveying roller. The conveying roller is arranged at multiple levels to drive the saggar to move.

[0029] The working principle is that the conveying device 100 drives the positive material in the sagger to move, and cooling is performed in three cold zones. In the first cooling mode, cold air is accurately controlled by the first rotor flow meter 207 to enter the upper and lower heat dissipation cover plates 201 and 202, is connected to the kiln exhaust main pipeline through a gas outlet pipeline, and simultaneously cools the upper and lower layers of the furnace through convection. In the second cooling mode, cold air is alternately introduced into the furnace through the left and right sides of the furnace convection heat dissipation pipeline 301, the air intake amount is controlled by the plug valve at the inlet of the furnace convection heat dissipation pipeline 301, exhaust air is connected to the kiln exhaust main pipeline after passing out of the furnace, and the pipeline cools the inside of the furnace. In the third cooling mode, cold air is sent to the bottom of the sagger by the second rotor flow meter 403 through the furnace air inlet pipeline 401, the air moves upward through the gap between the sagger, flows to the furnace exhaust main pipeline 402, the opening degree is controlled by the furnace exhaust plug valve 404, and is then connected to the kiln exhaust main pipeline to be discharged to the outside.

[0030] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features. The modification or replacement does not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A positive electrode material cooling section heat dissipation device, characterized by, The utility model relates to a heat dissipation system of a continuous tunnel kiln, which comprises a conveying device, a cover plate cooling cavity, a hearth pipeline cooling system and a hearth direct discharge cooling system. The conveying device is arranged inside the cover plate cooling cavity, the hearth pipeline cooling system and the hearth direct discharge cooling system and is used for conveying the sagger.

2. The positive electrode material cooling section heat sink of claim 1, wherein, The cover plate cooling cavity comprises an upper heat dissipation cover plate and a lower heat dissipation cover plate.

3. The positive electrode material cooling section heat sink of claim 2, wherein, The upper heat dissipation cover plate is arranged above the conveying device, and the lower heat dissipation cover plate is arranged below the conveying device.

4. The positive electrode material cooling section heat sink of claim 3, wherein, The upper heat dissipation cover plate is provided with an upper heat dissipation air inlet at one end and an upper heat dissipation air outlet at the other end.

5. The positive electrode material cooling section heat sink of claim 1, wherein, The lower heat dissipation cover plate is provided with a lower heat dissipation air inlet at one end and a lower heat dissipation air outlet at the other end.

6. The positive electrode material cooling section heat sink of claim 5, wherein, The upper heat dissipation air inlet and the lower heat dissipation air inlet are provided with a first rotor flowmeter.

7. The positive electrode material cooling section heat sink of claim 5, wherein, The hearth direct discharge cooling system comprises a hearth air inlet pipeline and a hearth air outlet pipeline.

8. The positive electrode material cooling section heat sink of claim 5, wherein, The hearth air inlet pipeline is arranged below the conveying device, and the hearth air outlet pipeline is arranged above the conveying device.

9. The positive electrode material cooling section heat sink of claim 8, wherein, The hearth air inlet pipeline is provided with a second rotor flowmeter.

10. The positive electrode material cooling section heat sink of claim 1, wherein, The hearth air outlet pipeline is provided with a hearth air outlet plug-in board at the outlet. The hearth pipeline cooling system comprises a plurality of groups of hearth convection heat dissipation pipelines which are uniformly distributed along the conveying direction of the conveying device. The hearth convection heat dissipation pipelines are arranged above the conveying device and are in communication with the hearth air outlet pipeline. The air inlet direction of every two adjacent hearth convection heat dissipation pipelines in each group of hearth convection heat dissipation pipelines is opposite. The utility model further comprises a temperature sensor which is uniformly arranged along the conveying direction of the conveying device.

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