Ventilation structure of energy storage cell baking equipment

Abstract

The utility model belongs to the technical field of baking equipment, and particularly relates to a ventilation structure of energy storage battery cell baking equipment. Wherein a gas outlet of the gas heater is connected with the top of the baking equipment; wherein the gas heater is suitable for introducing heated gas from the top of the baking equipment, and the gas heating device and the gas-gas heat exchanger are arranged, so that an up-feeding and down-pumping convection mode is formed in the baking chamber, the temperature of the gas for baking is increased before the gas enters the baking chamber, and the baking requirement is met; and after baking is finished, the temperature is reduced, and gas containing steam is guided into the gas-gas heat exchanger for heat exchange and then is guided into the gas heater again, so that breathing circulation is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of baking equipment, and particularly relates to a ventilation structure for an energy storage battery cell baking equipment. Background Art

[0002] In the manufacturing process of energy storage battery cells, strict control of moisture is required because moisture will react with the components in the electrolyte to generate HF, and HF will damage the SEI film formed during formation, thereby affecting the performance of the battery cells. At the same time, the consumption of the electrolyte will also affect the cycle performance of the battery cells. Currently, in addition to monitoring the environmental moisture conditions during the manufacturing process, the energy storage battery cells mainly rely on the baking process to remove the moisture of the non-injected battery cells (under high temperature and vacuum conditions, the moisture inside the battery cells can be vaporized and overflowed).

[0003] Currently, most of the energy storage battery cell baking is designed to heat inside the chamber, remove the moisture inside the battery cells, and at the same time, the nitrogen is circulated through breathing to take away the baked-out moisture. However, when breathing and circulating, the temperature difference between the nitrogen before entering and the temperature inside the baking chamber is too large, and it takes time to heat up.

[0004] Therefore, a ventilation structure for an energy storage battery cell baking equipment is provided to solve the technical problem that the temperature of the nitrogen before entering the baking chamber is lower than the temperature inside the baking chamber during breathing and circulating. Content of the Utility Model

[0005] The purpose of the utility model is to provide a ventilation structure for an energy storage battery cell baking equipment to solve the above technical problems.

[0006] To solve the above technical problems, the utility model provides a ventilation structure for an energy storage battery cell baking equipment, including: a gas heater; wherein the outlet of the gas heater is connected to the top of the baking equipment; and wherein the gas heater is adapted to introduce the heated gas from the top of the baking equipment.

[0007] Further, the inlet of the gas heater is connected to the bottom of the baking equipment; and

[0008] The low-temperature gas after baking is discharged from the bottom of the baking equipment, re-enters the gas heater to be heated, and then is introduced into the baking equipment again.

[0009] Further, the bottom of the baking equipment is connected to the inlet of the gas heater through a recovery pipe; and

[0010] An air-air heat exchanger is arranged on the recovery pipe to exchange heat for the gas discharged from the baking equipment.

[0011] Further, an air outlet pipe is arranged on the lower end surface of the baking equipment; and

[0012] The exhaust pipe penetrates through the bottom of the baking equipment.

[0013] Furthermore, one end of the exhaust pipe located inside the baking equipment is connected with a collecting pipe; wherein

[0014] A plurality of suction pipes are uniformly arranged on the collecting pipe.

[0015] Furthermore, one end of the exhaust pipe located outside the baking equipment is connected with the intake end of the gas-gas heat exchanger; and

[0016] The outlet end of the gas-gas heat exchanger is connected with the intake port of the gas heater.

[0017] Furthermore, an intake pipe is arranged on the upper end surface of the baking equipment; and

[0018] The intake pipe penetrates through the top of the baking equipment.

[0019] Furthermore, one end of the intake pipe located inside the baking equipment is connected with a shunt pipe; wherein

[0020] A plurality of shunt openings are uniformly arranged on the shunt pipe.

[0021] Furthermore, one end of the intake pipe located outside the baking equipment is connected with the outlet of the gas heater through a heat-resistant pipe.

[0022] Furthermore, a regulating valve is arranged on the heat-resistant pipe to control the gas flow rate flowing through the heat-resistant pipe and entering the baking equipment.

[0023] The beneficial effect of the present utility model is that by arranging a gas heating device and a gas-gas heat exchanger, a convection mode of upward supply and downward extraction is formed in the baking chamber, so that the gas for baking is heated before entering the baking chamber to meet the baking requirements, and after baking is completed, the gas with reduced temperature and containing water vapor is introduced into the gas-gas heat exchanger for heat exchange and then re-introduced into the gas heater to realize the breathing cycle.

[0024] Other features and advantages of the present utility model will be described in the subsequent description, and part of them will become obvious from the description, or will be understood by implementing the present utility model. The purpose and other advantages of the present utility model are achieved and obtained by the structures specifically pointed out in the description and the drawings.

[0025] In order to make the above-mentioned purposes, features and advantages of the present utility model more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. Description of the Drawings

[0026] To more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 is the overall three-dimensional structure schematic diagram of the present utility model;

[0028] Figure 2 is the internal structure schematic diagram of the baking equipment of the present utility model.

[0029] In the figure:

[0030] 1. Baking equipment; 2. Air inlet pipe; 21. Shunt pipe; 22. Shunt port; 3. Air outlet pipe; 31. Summarizing pipe; 32. Suction pipe; 4. Air-air heat exchanger; 41. Air inlet end; 42. Air outlet end; 5. Gas heater; 51. Air outlet; 52. Air inlet; 6. Recovery pipe; 7. Heat-resistant pipe. Specific embodiments

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions of the present utility model in conjunction with the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0032] Currently, most of the baking of energy storage battery cells is designed to heat inside the chamber to remove the moisture in the battery cells, and at the same time, the moisture baked out is carried away through the breathing cycle of nitrogen. However, when nitrogen enters during the breathing cycle, the temperature difference between the temperature before entering and the temperature inside the baking chamber is too large, and it takes time to heat up.

[0033] To solve the above technical problems, a gas exchange structure for an energy storage battery cell baking equipment is provided, which includes: a gas heater 5; wherein the air outlet 51 of the gas heater 5 is connected to the top of the baking equipment 1; wherein the gas heater 5 is adapted to introduce the heated gas from the top of the baking equipment 1; the air inlet 52 of the gas heater 5 is connected to the bottom of the baking equipment 1; wherein the low-temperature gas after baking is discharged from the bottom of the baking equipment 1 and re-enters the gas heater 5 to be heated and then introduced into the baking equipment 1 again.

[0034] In this embodiment, by providing a gas heater 5 and connecting the gas outlet 51 of the gas heater 5 to the top of the baking device 1, the gas heated in the gas heater 5 can be introduced into the baking device 1 from the top through a pipeline to bake the energy storage battery cells inside the baking device 1. After the gas bakes the energy storage battery cells, the moisture in the energy storage battery cells is evaporated, the gas temperature decreases, and it sinks to the bottom of the baking device 1, and then re-enters the baking device through the pipeline to be heated up to achieve circulation. The gas introduced into the baking device 1 is preferably nitrogen.

[0035] In some embodiments, the bottom of the baking device 1 is connected to the gas inlet 52 of the gas heater 5 through a recovery pipe 6; a gas-gas heat exchanger 4 is provided on the recovery pipe 6 to exchange heat for the gas discharged from the baking device 1; an air outlet pipe 3 is provided on the lower end surface of the baking device 1; and the air outlet pipe 3 penetrates through the bottom of the baking device 1; one end of the air outlet pipe 3 located inside the baking device 1 is connected to a collecting pipe 31; a plurality of air suction pipes 32 are uniformly provided on the collecting pipe 31; one end of the air outlet pipe 3 located outside the baking device 1 is connected to the gas inlet end 41 of the gas-gas heat exchanger 4; and the gas outlet end 42 of the gas-gas heat exchanger 4 is connected to the gas inlet 52 of the gas heater 5.

[0036] In this embodiment, after the gas bakes the energy storage battery cells, the moisture in the energy storage battery cells is evaporated, the gas temperature decreases, and it sinks to the bottom of the baking device 1, enters the collecting pipe 31 through the air suction pipes 32, enters the gas-gas heat exchanger 4 through the recovery pipe 6 for heat exchange, and the gas processed by the gas-gas heat exchanger 4 is discharged from the gas outlet end 42 of the gas-gas heat exchanger 4 and enters the gas heater 5 through the recovery pipe 6 to be reheated.

[0037] In some embodiments, an air inlet pipe 2 is provided on the upper end surface of the baking device 1; and the air inlet pipe 2 penetrates through the top of the baking device 1; one end of the air inlet pipe 2 located inside the baking device 1 is connected to a shunt pipe 21; a plurality of shunt openings 22 are uniformly provided on the shunt pipe 21; one end of the air inlet pipe 2 located outside the baking device is connected to the gas outlet 51 of the gas heater 5 through a heat-resistant pipe 7; a regulating valve is provided on the heat-resistant pipe 7 to control the gas flow rate flowing through the heat-resistant pipe 7 into the baking device.

[0038] In this embodiment, the gas heated by the gas heater 5 is introduced into the air inlet pipe 2 at the top of the baking device 1 through the heat-resistant pipe 7, and is discharged into the interior of the baking device 1 through the shunt openings 22 provided on the shunt pipe 21 to bake the energy storage battery cells evenly, and the regulating valve provided on the heat-resistant pipe 7 is used to adjust the gas flow rate into the baking device.

[0039] In summary, by providing a gas heating device and a gas-gas heat exchanger, a convection mode of upward supply and downward extraction is formed in the baking chamber, so that the gas for baking is heated before entering the baking chamber to reach the baking requirement, and after baking, the gas with reduced temperature and containing water vapor is introduced into the gas-gas heat exchanger for heat exchange and then re-introduced into the gas heater to achieve a breathing cycle.

[0040] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] Based on the above inspiration from the ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A ventilation structure for energy storage battery cell baking equipment, characterized in that: include: Gas heater; The gas outlet of the gas heater is connected to the top of the baking equipment; The gas heater is suitable for introducing the heated gas from the top of the baking equipment; The air inlet of the gas heater is connected to the bottom of the baking equipment; in The low-temperature gas after baking is discharged from the bottom of the baking equipment, re-enters the gas heater for heating, and then is introduced into the baking equipment again; The bottom of the baking device is connected to the air inlet of the gas heater through a recovery pipe; The recovery pipe is provided with an air-to-air heat exchanger to perform heat exchange on the gas exhausted from the baking equipment.

2. The ventilation structure of the energy storage battery cell baking equipment according to claim 1, characterized in that: The lower end surface of the baking device is provided with an air outlet pipe; and The air outlet pipe passes through the bottom of the baking equipment.

3. The ventilation structure of the energy storage battery cell baking equipment according to claim 2, characterized in that: One end of the air outlet pipe located inside the baking device is connected to a collecting pipe; A plurality of air intake pipes are evenly arranged on the collecting pipe.

4. The ventilation structure of the energy storage battery cell baking equipment according to claim 3, characterized in that: One end of the air outlet pipe located outside the baking device is connected to the air inlet end of the air-to-air heat exchanger; and The gas outlet end of the gas-to-gas heat exchanger is connected to the gas inlet of the gas heater.

5. The ventilation structure of the energy storage battery cell baking equipment according to claim 4, characterized in that: The upper end surface of the baking device is provided with an air inlet pipe; and The air inlet pipe passes through the top of the baking device.

6. The ventilation structure of the energy storage battery cell baking equipment according to claim 5, characterized in that: One end of the air inlet pipe located inside the baking device is connected to a diverter pipe; A plurality of diversion ports are evenly arranged on the diversion pipe.

7. The ventilation structure of the energy storage battery cell baking equipment according to claim 6, characterized in that: One end of the air inlet pipe located outside the baking equipment is connected to the air outlet of the gas heater through a heat-resistant pipe.

8. The ventilation structure of the energy storage battery cell baking equipment according to claim 7, characterized in that: The heat-resistant pipe is provided with a regulating valve to control the flow rate of the gas flowing through the heat-resistant pipe and entering the baking equipment.

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