Vacuum baking system

Abstract

The utility model relates to the technical field of baking equipment, and discloses a vacuum baking system which comprises a plurality of baking boxes, a first pipe assembly, a second pipe assembly, a first vacuum pump and a second vacuum pump. Each baking box is provided with a containing cavity; the first vacuum pump is connected with each containing cavity through a first pipe assembly, and the first vacuum pump is used for vacuumizing each containing cavity for the first time; the second vacuum pump is connected with each containing cavity through a second pipe assembly, and the second vacuum pump is used for performing second vacuum pumping on each containing cavity; wherein the vacuum degree of the second vacuum is smaller than that of the first vacuum. When the vacuum baking system is adopted to dry the battery cell, when the first vacuum pump vacuumizes the containing cavity of one baking box for the first time, the second vacuum pump can vacuumize the containing cavity of the other baking box for the second time, the vacuumizing work of the first vacuum pump and the vacuumizing work of the second vacuum pump are not interfered, and the problem of blow-by of all the containing cavities is avoided, so that the vacuum degree abnormity of all the containing cavities can be avoided; and the drying effect of the battery cell is good.

Description

Technical Field

[0001] The utility model relates to the technical field of baking equipment, in particular to a vacuum baking system. Background Art

[0002] The production of battery cells needs to go through a vacuum baking process. The vacuum baking process uses a vacuum pump to evacuate the baking box, and the battery cells are dried by vacuum heating. In the prior art, there are multiple baking boxes, and there is one vacuum pump. The vacuum pump is used to evacuate the baking box to a low vacuum and a high vacuum. During vacuum baking, the baking box is first evacuated to a low vacuum, and then to a high vacuum, so that the baking box can quickly reach a high vacuum environment. The battery cells are sent to different baking boxes in batches, and the battery cells need to be ventilated during the baking process. Therefore, the vacuum pump needs to work intermittently to maintain a high vacuum environment in the baking box. However, the vacuum degree of multiple baking boxes is controlled by one vacuum pump. When the next baking box is evacuated to a low vacuum, the previous baking box cannot be evacuated to a high vacuum, otherwise the vacuum degree is prone to abnormal problems, and the battery cell drying effect is not good. Utility Model Content

[0003] The primary purpose of the utility model is to provide a vacuum baking system, which is used to dry the battery core and has a good battery core drying effect.

[0004] In order to achieve the above-mentioned object, the utility model provides a vacuum baking system, including a plurality of baking boxes, a first pipe assembly, a second pipe assembly, a first vacuum pump and a second vacuum pump;

[0005] Each of the baking ovens has a cavity;

[0006] The first vacuum pump is connected to each of the cavities through the first pipe assembly, and the first vacuum pump is used to draw a first vacuum on each of the cavities;

[0007] The second vacuum pump is connected to each of the cavities through the second pipe assembly, and the second vacuum pump is used to draw a second vacuum on each of the cavities;

[0008] The vacuum degree of the second vacuum is higher than the vacuum degree of the first vacuum.

[0009] In a specific embodiment of the utility model, the first pipe assembly includes a first pipeline, a plurality of first branch pipes and a plurality of first control valves;

[0010] The first pipeline is connected to the first vacuum pump;

[0011] One end of each of the first branch pipes is connected to the first pipeline, and the other end is connected to one of the cavities, and each of the first branch pipes is connected to different cavities. Each of the first branch pipes is provided with the first control valve.

[0012] In a specific embodiment of the utility model, the first branch pipe includes a first pipe section and a second pipe section that are connected to each other, the first pipe section is connected to the cavity, the second pipe section is connected to the first pipeline, the first pipe section is arranged horizontally, and the second pipe section is arranged vertically;

[0013] The first control valve is arranged on the first pipe section.

[0014] In a specific embodiment of the present invention, each of the second pipe sections is arranged in parallel.

[0015] In a specific embodiment of the utility model, the second pipe assembly includes a second pipeline, a plurality of second branch pipes and a plurality of second control valves;

[0016] The second pipeline is connected to the second vacuum pump;

[0017] One end of each second branch pipe is connected to the second pipeline, and the other end is connected to one of the cavities, and each second branch pipe is connected to different cavities. Each second branch pipe is provided with the second control valve.

[0018] In a specific embodiment of the utility model, the second branch pipe includes a third pipe section and a fourth pipe section that are connected to each other, the third pipe section is connected to the cavity, the fourth pipe section is connected to the second pipeline, the third pipe section is arranged horizontally, and the fourth pipe section is arranged vertically;

[0019] The second control valve is arranged on the third pipe section.

[0020] In a specific embodiment of the present invention, each of the fourth pipe sections is arranged in parallel.

[0021] In a specific embodiment of the present invention, both the first control valve and the second control valve are baffle valves.

[0022] In a specific embodiment of the utility model, the vacuum baking system further comprises a vacuum gauge and a control module;

[0023] Each of the cavities is provided with a vacuum gauge, and the vacuum gauge is used to measure the vacuum degree of the cavity;

[0024] The first vacuum pump, the second vacuum pump, the first control valve, the second control valve and the vacuum gauge are all electrically connected to the control module;

[0025] The control module is configured to control the operation of the first vacuum pump and the first control valve according to the measurement result of the vacuum gauge, and / or control the operation of the second vacuum pump and the second control valve.

[0026] In a specific embodiment of the utility model, the baking oven comprises a box body and a box door, the box body and the box door are detachably connected, and the box body and the box door define the containing cavity;

[0027] The first pipe assembly and the second pipe assembly both pass through a side of the box body facing away from the box door and communicate with the cavity.

[0028] The vacuum baking system of the present invention has the following advantages compared with the prior art:

[0029] The vacuum baking system of the utility model comprises a first vacuum pump for drawing a first vacuum into a cavity, and a second vacuum pump for drawing a second vacuum into the cavity. When the vacuum baking system is used to dry a battery cell, since the first vacuum pump is connected to each cavity through a first tube assembly, and the second vacuum pump is connected to each cavity through a second tube assembly, the operations of the first vacuum pump and the second vacuum pump do not interfere with each other. Therefore, when the first vacuum pump draws a first vacuum into a cavity of a baking box, the second vacuum pump can draw a second vacuum into a cavity of another baking box. The vacuum drawing operations of the two do not interfere with each other, and the problem of cross-gassing will not occur in each cavity. Therefore, abnormal vacuum degree of each cavity can be avoided, and the drying effect of the battery cell is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural diagram of a vacuum baking system according to an embodiment of the utility model;

[0031] Figure 2 This is a structural diagram of the cooperation between the baking oven and the vacuum gauge in the embodiment of the utility model;

[0032] Figure 3 It is a schematic diagram of the coordination of a control module, a vacuum gauge, a first vacuum pump, a second vacuum pump, a first control valve and a second control valve according to an embodiment of the utility model.

[0033] In the figure, 1, baking oven; 101, cavity; 11, box body; 12, box door; 2, first pipe assembly; 21, first pipeline; 22, first branch pipe; 221, first pipe section; 222, second pipe section; 23, first control valve; 3, second pipe assembly; 31, second pipeline; 32, second branch pipe; 321, third pipe section; 322, fourth pipe section; 33, second control valve; 4, first vacuum pump; 5, second vacuum pump; 6, vacuum gauge; 7, control module; X, first direction. DETAILED DESCRIPTION

[0034] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0036] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] like Figure 1 to Figure 2As shown, a vacuum baking system of a preferred embodiment of the utility model includes multiple baking ovens 1, a first tube assembly 2, a second tube assembly 3, a first vacuum pump 4 and a second vacuum pump 5; each baking oven 1 has a cavity 101; the first vacuum pump 4 is connected to each cavity 101 through the first tube assembly 2, and the first vacuum pump 4 is used to draw a first vacuum to each cavity 101; the second vacuum pump 5 is connected to each cavity 101 through the second tube assembly 3, and the second vacuum pump 5 is used to draw a second vacuum to each cavity 101; wherein the vacuum degree of the second vacuum is higher than the vacuum degree of the first vacuum.

[0039] When the above-mentioned vacuum baking system of the present application is used to dry the battery cells, since the first vacuum pump 4 is connected to each cavity 101 through the first tube assembly 2, and the second vacuum pump 5 is connected to each cavity 101 through the second tube assembly 3, the operations of the first vacuum pump 4 and the second vacuum pump 5 do not interfere with each other. Therefore, when the first vacuum pump 4 draws a first vacuum on the cavity 101 of one baking box 1, the second vacuum pump 5 can draw a second vacuum on the cavity 101 of another baking box 1. The vacuum extraction operations of the two will not interfere with each other, and there will be no cross-gas problem in each cavity 101. Therefore, abnormal vacuum degree of each cavity 101 can be avoided, and the drying effect of the battery cells is good.

[0040] Here, vacuum refers to the pressure in the chamber 101 being less than a standard atmospheric pressure, and vacuum degree refers to the rarefaction of the gas in a vacuum state, and the rarefaction of the gas is usually expressed by the pressure value of the gas.

[0041] Exemplarily, the vacuum baking system performs the following vacuum pumping operation when drying the battery cell: after one of the cavities 101 is filled (battery cells are placed), the first tube assembly 2 connected to the cavity 101 is turned on, and the first vacuum pump 4 is used to pump the first vacuum into the cavity 101, so that the air pressure of the cavity 101 is pumped from the atmospheric pressure of 100,000 Pa to about 2,000 Pa. At this time, the first vacuum pump 4 is stopped and the first tube assembly 2 connected to the cavity 101 is closed. Thereafter, the second tube assembly 3 connected to the cavity 101 is turned on, and the second vacuum pump 5 is used to pump the second vacuum into the cavity 101, so that the air pressure of the cavity 101 is pumped from 2,000 Pa to below 100 Pa. Similarly, when another cavity 101 is filled, the above process is repeated to first pump the first vacuum into the cavity 101, and then the second vacuum is pumped. Through such control, the baking oven 1 in the vacuum process always uses the second vacuum pump 5 to provide a stable high vacuum. Meanwhile, other cavities 101 will not affect the second vacuum pump 5 during the process of drawing the first vacuum, thereby preventing the second vacuum pump 5 from having a momentary pressure failure and improving the overall stability of the equipment.

[0042] During the process of evacuating the cavity 101, the oven 1 starts to heat the cavity 101 to dry the battery cells. When the cavity 101 reaches the second vacuum, the second vacuum is maintained for a preset time, and then the heating is stopped. The cavity 101 is then depressurized, and finally the battery cells are taken out, thereby completing the drying of the battery cells.

[0043] like Figure 1 As shown, the first pipe assembly 2 includes a first pipe 21, a plurality of first branch pipes 22 and a plurality of first control valves 23; the first pipe 21 is connected to the first vacuum pump 4; one end of each first branch pipe 22 is connected to the first pipe 21, and the other end is connected to a cavity 101, and each first branch pipe 22 is connected to a different cavity 101, and each first branch pipe 22 is provided with a first control valve 23, and each first branch pipe 22 can be opened and closed by the first control valve 23. Specifically, when the first vacuum pump 4 evacuates one of the cavities 101, the first branch pipe 22 connected to the remaining cavities 101, the first control valve 23 thereon is in a closed state, thereby, under the action of the first vacuum pump 4, each cavity 101 can be individually evacuated to the first vacuum to avoid mutual influence.

[0044] Furthermore, the first branch pipe 22 includes a first pipe section 221 and a second pipe section 222 which are connected to each other, the first pipe section 221 is connected to the cavity 101, the second pipe section 222 is connected to the first pipeline 21, the first pipe section 221 is arranged horizontally, the second pipe section 222 is arranged vertically, and the first control valve 23 is arranged on the first pipe section 221. Since the first pipe section 221 is arranged horizontally, the operation of assembling the first control valve 23 on the first pipe section 221 is relatively simple.

[0045] Among them, each second pipe section 222 is arranged in parallel, so that the first pipe assembly 2 is arranged more neatly, which is beneficial to improving space utilization and facilitating repair and maintenance.

[0046] The second pipe assembly 3 includes a second pipe 31, multiple second branches 32 and multiple second control valves 33; the second pipe 31 is connected to the second vacuum pump 5; one end of each second branch pipe 32 is connected to the second pipe 31, and the other end is connected to a cavity 101, and each second branch pipe 32 is connected to a different cavity 101, and each second branch pipe 32 is provided with a second control valve 33, and each second branch pipe 32 can be opened and closed by the second control valve 33. Specifically, when the second vacuum pump 5 evacuates one of the cavities 101, the second branch pipe 32 connected to the remaining cavities 101, the second control valve 33 thereon is in a closed state. Therefore, under the action of the second vacuum pump 5, each cavity 101 can be individually evacuated for the second vacuum to avoid mutual influence.

[0047] In a single chamber 101, when the first vacuum is drawn, the first control valve 23 is in an open state and the second control valve 33 is in a closed state, and when the second vacuum is drawn, the first control valve 23 is in a closed state and the second control valve 33 is in an open state, that is, the first vacuum drawing and the second vacuum drawing are carried out separately, and the two will not interfere with each other.

[0048] Furthermore, the second branch pipe 32 includes a third pipe segment 321 and a fourth pipe segment 322 which are connected to each other. The third pipe segment 321 is connected to the cavity 101, and the fourth pipe segment 322 is connected to the second pipeline 31. The third pipe segment 321 is arranged horizontally, and the fourth pipe segment 322 is arranged vertically. The second control valve 33 is arranged on the third pipe segment 321. Since the fourth pipe segment 322 is arranged horizontally, the operation of assembling the second control valve 33 on the fourth pipe segment 322 is relatively simple.

[0049] The fourth pipe sections 322 are arranged in parallel, so that the second pipe assembly 3 is arranged more neatly, which is beneficial to improving space utilization and facilitating repair and maintenance.

[0050] In the present application, the first control valve 23 and the second control valve 33 are both baffle valves, which have the characteristics of good sealing and fast response speed and can meet the vacuum degree requirement of the chamber 101.

[0051] like Figures 1 to 3 As shown, the vacuum baking system also includes a vacuum gauge 6 and a control module 7; each cavity 101 is provided with a vacuum gauge 6, and the vacuum gauge 6 is used to measure the vacuum degree of the cavity 101; the first vacuum pump 4, the second vacuum pump 5, the first control valve 23, the second control valve 33 and the vacuum gauge 6 are all electrically connected to the control module 7; the control module 7 is configured to control the first vacuum pump 4 and the first control valve 23 to work according to the measurement result of the vacuum gauge 6, and / or control the second vacuum pump 5 and the second control valve 33 to work; specifically, the vacuum pumping work of a single cavity 101 is described. When the cavity 101 is vacuumed, the control module 7 controls the first control valve 23 to open, and controls the second control valve 33 to open. A vacuum pump 4 is started to draw a first vacuum to the cavity 101. When the vacuum gauge 6 detects that the first vacuum degree is reached in the cavity 101, the vacuum gauge 6 generates a first signal and transmits it to the control module 7. The control module 7 controls the first vacuum pump 4 to stop working and controls the first control valve 23 to close. Thereafter, the control module 7 controls the second control valve 33 to open and controls the second vacuum pump 5 to start working to draw a second vacuum to the cavity 101. When the vacuum gauge 6 detects that the second vacuum degree is reached in the cavity 101, the vacuum gauge 6 generates a second signal and transmits it to the control module 7. The control module 7 controls the second vacuum pump 5 to stop working and controls the second control valve 33 to close.

[0052] As one of the implementations of the present application, the control module 7 includes a host computer and a slave computer, the slave computer is electrically connected to the host computer, the vacuum gauge 6 is electrically connected to the host computer, the slave computer is electrically connected to the first vacuum pump 4, the second vacuum pump 5, the first control valve 23 and the second control valve 33, the host computer sends a control instruction to the slave computer based on the signal of the vacuum gauge 6, and the slave computer controls the operation of the first vacuum pump 4 and the first control valve 23 based on the control instruction, and / or controls the operation of the second vacuum pump 5 and the second control valve 33.

[0053] The above-mentioned control module 7 and vacuum gauge 6 are both existing technologies, and this application will not elaborate on them in detail.

[0054] like Figure 1 and Figure 2 As shown, the baking oven 1 includes a box body 11 and a box door 12, and the box body 11 and the box door 12 are detachably connected. The box body 11 and the box door 12 define a cavity 101. In practical applications, in order to facilitate the placement of materials into the cavity 101, the baking ovens 1 are arranged at intervals along the first direction X, and the sides of the baking ovens 1 where the box doors 12 are located are oriented in the same direction; and the first tube assembly 2 and the second tube assembly 3 both pass through a side of the box body 11 facing away from the box door 12 and communicate with the cavity 101, that is, the second tube segment 222 and the fourth tube segment 322 are connected to a side of the box body 11 facing away from the box door 12, and the first tube assembly 2 and the second tube assembly 3 are located on a side of the box body 11 away from the box door 12, thereby, the first tube assembly 2 and the second tube assembly 3 do not extend between two adjacent baking ovens 1, and the distance between the two adjacent baking ovens 1 can be designed to be smaller, thereby, the vacuum baking system can be more compact.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A vacuum baking system, characterized in that: It comprises a plurality of baking ovens (1), a first tube assembly (2), a second tube assembly (3), a first vacuum pump (4) and a second vacuum pump (5); Each of the baking ovens (1) has a cavity (101); The first vacuum pump (4) is connected to each of the cavities (101) via the first tube assembly (2), and the first vacuum pump (4) is used to draw a first vacuum on each of the cavities (101); The second vacuum pump (5) is connected to each of the cavities (101) via the second pipe assembly (3), and the second vacuum pump (5) is used to draw a second vacuum on each of the cavities (101); The vacuum degree of the second vacuum is higher than the vacuum degree of the first vacuum.

2. The vacuum baking system according to claim 1, characterized in that: The first pipe assembly (2) comprises a first pipeline (21), a plurality of first branch pipes (22) and a plurality of first control valves (23); The first pipeline (21) is connected to the first vacuum pump (4); One end of each first branch pipe (22) is connected to the first pipeline (21), and the other end is connected to one of the cavities (101), and each first branch pipe (22) is connected to a different cavities (101), and each first branch pipe (22) is provided with the first control valve (23).

3. The vacuum baking system according to claim 2, characterized in that: The first branch pipe (22) comprises a first pipe section (221) and a second pipe section (222) which are connected to each other, the first pipe section (221) is connected to the cavity (101), the second pipe section (222) is connected to the first pipeline (21), the first pipe section (221) is arranged horizontally, and the second pipe section (222) is arranged vertically; The first control valve (23) is arranged on the first pipe section (221).

4. The vacuum baking system according to claim 3, characterized in that: The second pipe sections (222) are arranged in parallel.

5. The vacuum baking system according to claim 2, characterized in that: The second pipe assembly (3) comprises a second pipeline (31), a plurality of second branch pipes (32) and a plurality of second control valves (33); The second pipeline (31) is connected to the second vacuum pump (5); One end of each second branch pipe (32) is connected to the second pipeline (31), and the other end is connected to one of the cavities (101), and each second branch pipe (32) is connected to a different cavities (101), and each second branch pipe (32) is provided with a second control valve (33).

6. The vacuum baking system according to claim 5, characterized in that: The second branch pipe (32) comprises a third pipe section (321) and a fourth pipe section (322) which are connected to each other, the third pipe section (321) is connected to the cavity (101), and the fourth pipe section (322) is connected to the second pipe (31), the third pipe section (321) is arranged horizontally, and the fourth pipe section (322) is arranged vertically; The second control valve (33) is arranged on the third pipe section (321).

7. The vacuum baking system according to claim 6, characterized in that: The fourth pipe sections (322) are arranged in parallel.

8. The vacuum baking system according to claim 5, characterized in that: The first control valve (23) and the second control valve (33) are both flapper valves.

9. The vacuum baking system according to claim 5, characterized in that: The vacuum baking system further comprises a vacuum gauge (6) and a control module (7); Each of the containing cavities (101) is provided with the vacuum gauge (6), and the vacuum gauge (6) is used to measure the vacuum degree of the containing cavity (101); The first vacuum pump (4), the second vacuum pump (5), the first control valve (23), the second control valve (33) and the vacuum gauge (6) are all electrically connected to the control module (7); The control module (7) is configured to control the operation of the first vacuum pump (4) and the first control valve (23) according to the measurement results of the vacuum gauge (6), and / or control the operation of the second vacuum pump (5) and the second control valve (33).

10. The vacuum baking system according to claim 1, characterized in that: The baking oven (1) comprises a box body (11) and a box door (12), wherein the box body (11) and the box door (12) are detachably connected, and the box body (11) and the box door (12) define the containing cavity (101); The first pipe assembly (2) and the second pipe assembly (3) both pass through a side of the box body (11) facing away from the box door (12) and are in communication with the containing cavity (101).

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