Drying equipment for lithium battery production

Abstract

The utility model discloses drying equipment for lithium battery production. The drying equipment comprises a first heat exchange unit, a second heat exchange unit and a third heat exchange unit, and the second heat exchange unit is used for exchanging heat with the first heat exchange unit. According to the drying device, heat generated in the drying process can be effectively recycled, heat waste is reduced, and meanwhile scalding accidents of workers are effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to drying equipment technical field, concretely relates to a drying equipment for lithium battery production. BACKGROUND

[0002] The diaphragm is a very important part in the lithium battery, is arranged between the positive and negative pole of lithium battery to avoid the short circuit and other safety accidents of battery. The performance of diaphragm directly influences the heating and safety performance of battery, therefore, the drying temperature of diaphragm must be strictly controlled in the production and manufacturing process.

[0003] In the production process of lithium battery diaphragm, drying treatment is needed, and the air flow drying mode is generally adopted, and the equipment and procedure of different manufacturers are slightly different, but the drying temperature is generally between 120-140 degrees. The drying time also needs to be paid attention to during the drying process, and generally needs to be controlled according to the specific equipment and process.

[0004] However, after the drying of lithium battery diaphragm is finished, there is still a high heat in the drying box, and if the drying box is opened to take out the lithium battery diaphragm at this time, the heat will be spilled, causing waste, and the lithium battery diaphragm is taken out, which is easy to cause the scalding of workers. UTILITY MODEL CONTENTS

[0005] In order to solve the problems in the prior art, the utility model provides a drying equipment for lithium battery production, which can effectively recover the heat generated in the drying process, reduce the waste of heat, and effectively reduce the scalding accidents of workers.

[0006] In order to achieve the above purpose, the utility model adopts the technical scheme of a drying equipment for lithium battery production, which comprises: a first heat exchange unit for heat exchange with a to-be-dried part in the drying equipment; and a second heat exchange unit for heat exchange with the first heat exchange unit.

[0007] The above technical scheme can effectively recover the heat generated in the drying process, reduce the waste of heat, and effectively reduce the scalding accidents of workers through the heat exchange between the first heat exchange unit and the to-be-dried part and the heat exchange between the second heat exchange unit and the first heat exchange unit.

[0008] Optionally, the drying equipment comprises: a box body and a containing cavity for containing the to-be-dried part; a side heat insulation bin and a lower heat insulation bin arranged between the box body and the containing cavity, the side heat insulation bin and the lower heat insulation bin being communicated; and the first heat exchange unit for driving the air in the drying equipment to circulate and flow between the containing cavity, the side heat insulation bin and the lower heat insulation bin is installed in the exhaust pipe, and the exhaust pipe is communicated with the lower heat insulation bin.

[0009] The technical scheme has the advantages that the side heat insulation bin, the lower heat insulation bin and the exhaust pipe are arranged to establish a wind circulation path of the first heat exchange unit, so that the circulating wind for heat exchange can effectively pass through the drying pieces, the stable flow of the circulating wind is ensured, and the heat exchange efficiency and the drying efficiency are improved.

[0010] Optionally, the exhaust pipe is provided with a motor, and a fan blade is arranged at an output end of the motor.

[0011] The technical scheme has the advantages that the motor and the fan blade driven by the motor are arranged to provide a power source for the circulating wind, the effective and stable flow of the circulating wind is ensured, and the heat exchange efficiency and the drying efficiency are improved.

[0012] Optionally, the exhaust pipe is provided with a one-way air outlet mechanism for connecting the exhaust pipe and the accommodating cavity, the one-way air outlet mechanism comprises a blocking plate, an exhaust port arranged on the blocking plate, a first baffle plate hinged to one side of the exhaust port through a second rotating shaft, and a first counterweight rod arranged on the other side of the first baffle plate and overlapping the other side of the exhaust port.

[0013] The technical scheme has the advantages that when the wind pressure is greater than the sum of the gravity of the first baffle plate and the first counterweight rod, the circulating wind flows normally, and when the wind pressure is less than the sum of the gravity of the first baffle plate and the first counterweight rod, the first baffle plate covers the exhaust port under the joint action of the gravity of the first baffle plate and the first counterweight rod, so that the circulating wind is prevented from flowing backward, the efficient and stable flow of the circulating wind is effectively ensured, and the heat exchange efficiency and the drying efficiency are improved.

[0014] Optionally, the blocking plate is provided with a limiting rod for limiting the opening angle of the first baffle plate.

[0015] The technical scheme has the advantages that the limiting rod can prevent the first baffle plate from being turned too much due to excessive wind pressure, so that the first baffle plate cannot be smoothly closed, the one-way air outlet mechanism is prevented from failing, the circulating wind is prevented from flowing backward, the efficient and stable flow of the circulating wind is effectively ensured, and the heat exchange efficiency and the drying efficiency are improved.

[0016] Optionally, the side heat insulation bin is provided with a one-way air inlet mechanism for connecting the accommodating cavity and the side heat insulation bin, the one-way air inlet mechanism comprises an air inlet arranged on the side heat insulation bin, and a second baffle plate hinged to one side of the air inlet through a third rotating shaft and provided with a second counterweight rod on the other side of the second baffle plate and overlapping the other side of the air inlet.

[0017] The technical scheme has the following beneficial effects: when the wind pressure is greater than the sum of the gravity of the second baffle and the second counterweight rod, the circulating wind flows normally; when the wind pressure is less than the sum of the gravity of the second baffle and the second counterweight rod, the second baffle covers the air inlet under the joint action of its own gravity and the gravity of the second counterweight rod, preventing the circulating wind from flowing backward, effectively ensuring the efficient and stable flow of the circulating wind, and helping to improve the heat exchange efficiency and the drying efficiency.

[0018] Optionally, the second heat exchange unit comprises a pressurizing cylinder for extracting the heat exchange medium from a header arranged at the top of the cabinet and delivering the heat exchange medium to the header through heat exchange pipes arranged in the lower heat insulation bin and the side heat insulation bin; the inlet of the pressurizing cylinder is connected to the header through a delivery pipe.

[0019] The technical scheme has the following beneficial effects: the circulating path of the heat exchange medium is formed by the header, the heat exchange pipes and the delivery pipe, the heat exchange between the second heat exchange unit and the first heat exchange unit is effectively performed, the heat generated during the drying process is effectively recovered, the heat waste is reduced, and the scalding accidents of the workers are effectively reduced.

[0020] Optionally, the pressurizing cylinder is provided with turbine blades, and the turbine blades are drivingly connected to the motor through a first rotating shaft.

[0021] The technical scheme has the following beneficial effects: the turbine blades are arranged in the pressurizing cylinder, the turbine blades are drivingly connected to the motor through the first rotating shaft, the power source for the flow of the heat exchange medium in the second heat exchange unit is formed, the turbine blades and the fan blades are driven by the same motor, the design of the power mechanism is simplified, the overall size of the first heat exchange unit and the second heat exchange unit is reduced, more space is reserved for placing the drying pieces, the drying equipment can dry more products at a time, and the drying efficiency is improved.

[0022] Optionally, the heat exchange pipes are arranged at equal intervals in the lower heat insulation bin and the side heat insulation bin.

[0023] The technical scheme has the following beneficial effects: the heat exchange pipes are arranged at equal intervals in the lower heat insulation bin and the side heat insulation bin, the heat exchange area of the first heat exchange unit and the second heat exchange unit can be effectively increased, and the heat exchange efficiency is improved.

[0024] Optionally, a plurality of flanges for supporting brackets are arranged on the side of the side heat insulation bin facing the containing cavity, and the brackets are used for placing the drying pieces.

[0025] The technical scheme has the following beneficial effects: the first heat exchange unit and the second heat exchange unit are used for heat exchange with the to-be-dried piece in the drying equipment, heat generated in the drying process can be effectively recovered, heat waste is reduced, and the scalding accidents of the workers are effectively reduced.

[0026] Compared with the prior art, the drying equipment has the following beneficial effects: the first heat exchange unit and the second heat exchange unit are used for heat exchange with the to-be-dried piece in the drying equipment, heat generated in the drying process can be effectively recovered, heat waste is reduced, and the scalding accidents of the workers are effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a front left perspective view of a drying equipment for lithium battery production according to an embodiment of the present application;

[0028] Figure 2 is a cross-sectional view of the drying equipment for lithium battery production according to an embodiment of the present application;

[0029] Figure 3 is an enlarged view of A in FIG. Figure 2

[0030] Figure 4 is a cross-sectional view of the exhaust pipe according to an embodiment of the present application;

[0031] Figure 5 is a cross-sectional view of the pressurizing cylinder according to an embodiment of the present application;

[0032] Figure 6 is an enlarged view of B in FIG. Figure 5

[0033] Figure 7 is a schematic view of the overall structure of the second heat exchange unit according to an embodiment of the present application;

[0034] In the drawing: 1, box body; 2, lower heat insulation bin; 3, exhaust pipe; 4, motor; 5, fan blade; 6, side heat insulation bin; 7, pressurizing cylinder; 8, heat exchange pipe; 9, header; 10, conveying pipe; 11, first rotating shaft; 12, turbine blade; 13, blocking plate; 14, exhaust port; 15, second rotating shaft; 16, first baffle; 17, first counterweight rod; 18, limiting rod; 19, air inlet; 20, third rotating shaft; 21, second baffle; 22, second counterweight rod; 23, box door; 24, bracket; 25, supporting leg. DETAILED DESCRIPTION

[0035] ​​The utility model will be described further below with reference to the drawings. The following examples are only used to make the technical scheme of the utility model more clear, and cannot be used to limit the protection scope of the utility model.

[0036] In the description of the utility model, it needs to be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only used for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0037] In the description of the utility model, it needs to be understood that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] As Figures 1-7 shown, a drying equipment for lithium battery production, comprising: a first heat exchange unit for heat exchange with the to-be-dried piece in the drying equipment;The second heat exchange unit for heat exchange with the first heat exchange unit.

[0039] The utility model takes the diaphragm used in lithium battery production as an example to dry, and further describes the drying equipment described in the utility model, that is, the to-be-dried piece described in the utility model is the diaphragm used in lithium battery production;Among them, the heat exchange medium used by the second heat exchange unit in the utility model is water (according to the specific heat exchange requirement, other suitable heat exchange medium can be selected).

[0040] The drying equipment comprises a box body 1, a containing cavity for containing a diaphragm (a piece to be dried), a side heat insulation bin 6 and a lower heat insulation bin 2 arranged between the box body 1 and the containing cavity, the side heat insulation bin 6 being communicated with the lower heat insulation bin 2, and a first heat exchange unit for driving air in the drying equipment to circulate between the containing cavity, the side heat insulation bin 6 and the lower heat insulation bin 2 being arranged in an exhaust pipe 3 communicated with the lower heat insulation bin 2.

[0041] The lower heat insulation bin 2 is arranged at the bottom of the box body 1, a one-way air outlet mechanism is arranged at the upper end of the exhaust pipe 3, a motor 4 is arranged in the exhaust pipe 3, a fan blade 5 is fixedly connected to the output shaft of the motor 4, the side heat insulation bins 6 are arranged at the left and right sides of the box body 1, one-way air inlet mechanisms are arranged at the upper ends of the side heat insulation bins 6, and heat exchange pipes 8 are arranged between the lower heat insulation bin 2 and the two side heat insulation bins 6.

[0042] The one-way air outlet mechanism for communicating the exhaust pipe 3 with the containing cavity comprises a blocking plate 13, exhaust ports 14 arranged on the blocking plate 13, the exhaust ports 14 being evenly arranged on the blocking plate 13, a first baffle 16 being hingedly connected to one side of the exhaust ports 14 through a second rotating shaft 15, and a first counterweight rod 17 being arranged on the other side of the first baffle 16 and being overlapped with the other side of the exhaust ports 14. A limiting rod 18 is arranged on the blocking plate 13 for limiting the opening angle of the first baffle 16.

[0043] The side heat insulation bin 6 is provided with a one-way air inlet mechanism for communicating the containing cavity with the side heat insulation bin 6, the one-way air inlet mechanism comprising an air suction port 19 arranged on the inclined wall of the upper end of the side heat insulation bin 6, a second baffle 21 being hingedly connected to one side of the air suction port 19 through a third rotating shaft 20, and a second counterweight rod 22 being arranged on the other side of the second baffle 21 and being overlapped with the other side of the air suction port 19.

[0044] The second heat exchange unit comprises a pressurizing cylinder 7 for extracting a heat exchange medium (water) from a header 9 arranged at the top of the box body 1 and delivering the heat exchange medium to the header 9 through the heat exchange pipes 8 arranged in the lower heat insulation bin 2 and the side heat insulation bins 6. The inlet of the pressurizing cylinder 7 is connected to the header 9 through a delivery pipe 10. Turbine blades 12 are arranged in the pressurizing cylinder 7, and the turbine blades 12 are drivingly connected to the motor 4 through a first rotating shaft 11. The plurality of heat exchange pipes 8 are arranged at equal intervals in the lower heat insulation bin 2 and the side heat insulation bins 6.

[0045] The pressurizing cylinder 7 is arranged in the lower heat insulation bin 2 and is fixedly arranged below the fan blade 5. The pressurizing cylinder 7 is fixedly communicated with a plurality of heat exchange pipes 8 arranged at the left and right sides of the pressurizing cylinder 7. The heat exchange pipes 8 arranged at the left and right sides are fixedly arranged in the side heat insulation bins 6 arranged at the left and right sides. The header 9 is fixedly arranged at the middle of the upper end of the box body 1. The inlet of the pressurizing cylinder 7 is arranged at the middle of the lower side of the pressurizing cylinder 7. The first rotating shaft 11 is arranged at the middle of the pressurizing cylinder 7.

[0046] The front end of the box body 1 is hinged with a box door 23; through the setting of the box door 23, the diaphragm to be dried can be conveniently taken out.

[0047] A plurality of flanges arranged at equal intervals in the up-down direction are arranged between the left and right side heat insulation compartments 6 in the box body 1, and the flanges are used to support the bracket 24; through the setting of the bracket 24, the diaphragm to be dried can be conveniently placed.

[0048] The lower side of the box body 1 is fixedly connected with four supporting legs 25; through the setting of the supporting legs 25, the box body 1 can be supported.

[0049] Working principle: when the motor 4 is started, the motor 4 drives the fan blade 5 to rotate, and with the rapid rotation of the fan blade 5, the exhaust pipe 3 blows upward to the first baffle 16, which is turned upward and leaves the upper end of the exhaust port 14, so that the exhaust pipe 3 blows air to the bottom of the containing cavity, and at the same time, under the action of air pressure, the second baffle 21 is turned upward to leave the upper end of the air inlet 19, so that the air in the top of the containing cavity is sequentially sucked into the lower heat insulation compartment 2 through the air inlet 19 and the side heat insulation compartment 6, thereby forming a circulating air flow; at the same time, the output shaft of the motor 4 drives the turbine blade 12 to rotate through the first rotating shaft 11, so that the water in the header 9 is pumped into the pressurizing cylinder 7 through the conveying pipe 10, and then the water in the pressurizing cylinder 7 is conveyed back to the header 9 through the plurality of heat exchange pipes 8, thereby forming a circulating water flow, so that the circulating water flow and the circulating air flow can be heat exchanged through the heat exchange pipes 8 in the side heat insulation compartment 6.

[0050] When the equipment is used, the lithium battery diaphragm to be dried is evenly placed on the bracket 24 in the containing cavity, then the box door 23 is closed and the drying function of the drying equipment is started to dry the lithium battery diaphragm, after the lithium battery diaphragm is dried, the drying function of the drying equipment is closed, and the motor 4 is started, so that the circulating air flow and the circulating water flow are synchronously operated, at this time, the circulating water flow cools the circulating air flow, and the circulating air flow cools the lithium battery diaphragm, after the lithium battery diaphragm is cooled, the motor 4 is closed and the box door 23 is opened, and the dried lithium battery diaphragm is taken out; then the new lithium battery diaphragm to be dried is evenly placed on the bracket 24 in the containing cavity of the drying equipment, the box door 23 is closed, and the motor 4 is started, so that the previously heat-absorbed circulating water flow heats the circulating air flow, and the circulating air flow preheats the lithium battery material to be dried, thereby realizing the recycling of heat.

[0051] After the motor 4 is closed, the fan blade 5 stops rotating, the circulating air flow stops, and the first baffle 16 is automatically turned downward to block the exhaust port 14 under the gravity of the first counterweight rod 17, at the same time, the second baffle 21 is automatically turned downward to block the air inlet 19 under the gravity of the second counterweight rod 22, thereby stopping heat exchange.

[0052] In summary, the device can cool the circulating air flow by the circulating water flow, and cool the lithium battery diaphragm just finished drying by the circulating air flow, so as to accelerate the cooling speed of the lithium battery diaphragm which has been dried, avoid the accident of the staff being scalded, and improve the drying efficiency of the lithium battery diaphragm; meanwhile, the circulating water flow stores a certain amount of heat in the process of cooling the lithium battery diaphragm which has been dried, and the heat stored by the circulating water flow can heat the circulating air flow before the new lithium battery diaphragm to be dried is dried, so that the circulating air flow preheats the new lithium battery diaphragm to be dried, thereby realizing the recycling of the heat, and reducing the production cost of the lithium battery.

[0053] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. A drying apparatus for lithium battery production, characterized by, The utility model relates to a heat exchange unit for heat exchange with the article to be dried in the drying equipment, and a heat exchange unit for heat exchange with the first heat exchange unit. The drying equipment comprises a box body (1) and a containing cavity for containing the article to be dried. The side heat insulation bin (6) and the lower heat insulation bin (2) are arranged between the box body (1) and the containing cavity and are communicated.

2. The drying apparatus for lithium battery production according to claim 1, wherein, The first heat exchange unit for driving the air in the drying equipment to circulate between the containing cavity, the side heat insulation bin (6) and the lower heat insulation bin (2) is arranged in the exhaust pipe (3) which is communicated with the lower heat insulation bin (2). The motor (4) is arranged in the exhaust pipe (3), and the output end of the motor (4) is provided with a fan blade (5). The exhaust pipe (3) is provided with a one-way air outlet mechanism for communicating the exhaust pipe (3) with the containing cavity.

3. The drying apparatus for lithium battery production according to claim 2, characterized in that, The exhaust port (14) is arranged on the blocking plate (13).

4. The drying apparatus for lithium battery production according to claim 2, wherein One side of the first baffle (16) is hinged to one side of the exhaust port (14) through a second rotating shaft (15), and the other side of the first baffle (16) is provided with a first counterweight rod (17) and is overlapped with the other side of the exhaust port (14). The blocking plate (13) is provided with a limiting rod (18) for limiting the opening angle of the first baffle (16). The side heat insulation bin (6) is provided with a one-way air inlet mechanism for communicating the containing cavity with the side heat insulation bin (6). The suction port (19) is arranged on the side heat insulation bin (6).

5. The drying apparatus for lithium battery production according to claim 4, wherein One side of the second baffle (21) is hinged to one side of the suction port (19) through a third rotating shaft (20), and the other side of the second baffle (21) is provided with a second counterweight rod (22) and is overlapped with the other side of the suction port (19).

6. The drying apparatus for lithium battery production according to claim 2, wherein The second heat exchange unit comprises a pressurizing cylinder (7) for extracting the heat exchange medium from the header (9) arranged at the top of the box body (1) and conveying the heat exchange medium to the header (9) through the heat exchange pipes (8) arranged in the lower heat insulation bin (2) and the side heat insulation bin (6); the inlet of the pressurizing cylinder (7) is connected with the header (9) through a conveying pipe (10). The pressurizing cylinder (7) is provided with turbine blades (12) which are drivingly connected with the motor (4) through a first rotating shaft (11). A plurality of heat exchange pipes (8) are arranged at equal intervals in the lower heat insulation bin (2) and the side heat insulation bin (6).

7. The drying apparatus for lithium battery production according to claim 3, wherein A plurality of flanges for supporting brackets (24) are arranged on one side of the side heat insulation bin (6) facing the containing cavity, and the brackets (24) are used for placing the article to be dried.

8. The drying apparatus for lithium battery production according to claim 7, characterized in that, ​ 9. The drying apparatus for lithium battery production according to claim 7, wherein ​ 10. The drying apparatus for lithium battery production according to claim 2, wherein ​

Images