Intermittent coating furnace

Abstract

The utility model belongs to the technical field of cladding furnaces, and particularly relates to an intermittent cladding furnace which comprises a driving mechanism, a first heating shell, a second heating shell and a furnace pipe, and the furnace pipe is provided with an accommodating space for accommodating a battery positive electrode material; the first heating shell and the second heating shell are both installed on the driving mechanism, and the driving mechanism is used for driving the first heating shell and the second heating shell to be closed or separated; when the first heating shell and the second heating shell are closed, the furnace pipe is located in a heating space defined by the first heating shell and the second heating shell. The intermittent coating furnace is simple in structure, small in occupied space and high in cooling efficiency, and the production efficiency of the battery positive electrode material is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of cladding furnace, especially, relate to an intermittent cladding furnace. BACKGROUND

[0002] Lithium ion batteries are widely used in various electronic devices, especially in mobile electronics (notebook computers, digital cameras, mobile phones, etc.). With the increasing power of mobile electronic consumer products, the power consumption of the battery increases significantly, and at the same time, the volume is required to be smaller and smaller to improve its portability, so the energy density of the lithium ion battery matched with it is required to be continuously improved. In order to improve the energy density of the lithium ion battery, the charging cutoff voltage of the lithium ion battery can be improved, which can improve the discharge capacity of the lithium ion battery of the same system. However, under high charging cutoff voltage, the cycle performance of ordinary positive electrode materials (such as lithium cobalt oxide material) deteriorates rapidly, which is mainly due to the strong oxidizing property of the positive electrode material at high voltage, which reacts with the electrolyte and causes the decomposition of the positive electrode material structure. Therefore, improving the cycle performance and other electrochemical properties of the positive electrode material at high charging cutoff voltage is an important direction for the development of lithium ion battery positive electrode material technology.

[0003] However, as a power battery positive electrode material, the cycle performance and safety performance of the ternary positive electrode material have certain gap with the lithium iron phosphate battery, so the current method is to further modify the material by doping and coating to improve its cycle life.

[0004] Generally, a cladding furnace is used to heat and coat the battery positive electrode material. The cladding furnace uses a periodic method to heat the battery positive electrode material. After the battery positive electrode material is heated in the cladding furnace, a mechanical hand is used to take out the battery positive electrode material from the cladding furnace and cool it. However, the existing cladding furnace has the technical problems of large space occupation, long production cycle, low production efficiency, etc. SUMMARY

[0005] The utility model discloses in view of the technical problems such as the large space occupation, long production cycle, low production efficiency of the cladding furnace in the prior art, and provides an intermittent cladding furnace and heating equipment.

[0006] In view of the above technical problems, the utility model embodiment provides an intermittent cladding furnace, which comprises a driving mechanism, a first heating shell, a second heating shell and a furnace.

[0007] The first heating shell and the second heating shell are both installed on the driving mechanism, and the driving mechanism is used to drive the first heating shell and the second heating shell to close or separate.

[0008] When the first heat-generating housing and the second heat-generating housing are closed, the furnace is located in a heating space enclosed by the first heat-generating housing and the second heat-generating housing.

[0009] Optionally, the first heat-generating housing includes a first heat-insulating layer, a first heating layer, and a first outer shell having a first groove, wherein the first heat-insulating layer is attached to an inner wall of the first groove, and the first heating layer is attached to an end of the first heat-insulating layer facing away from the first outer shell;

[0010] The second heat-generating shell includes a second insulation layer, a second heating layer and a second outer shell with a second groove. The second insulation layer is attached to the inner wall of the second groove, and the second heating layer is attached to one end of the second insulation layer away from the second outer shell.

[0011] Optionally, the intermittent coating furnace further includes a support frame, and the furnace core is installed on the support frame.

[0012] Optionally, the support frame includes a first support base, a second support base, and a support platform installed between the first support base and the second support base, and the furnace is installed on the support platform;

[0013] When the first heat-generating housing and the second heat-generating housing are closed, the first support base and the second support base are both located outside the heating space.

[0014] Optionally, the support frame further includes a transmission member installed on the support platform, and the transmission member is used to drive the furnace to move on the support platform.

[0015] Optionally, the driving mechanism includes a driving member, a first nut, a second nut, and a screw having a left-handed external thread section and a right-handed external thread section; the first nut is mounted on the first heating housing and is provided with a left-handed internal thread hole adapted to the left-handed external thread section; the second nut is mounted on the second heating housing and is provided with a right-handed internal thread hole adapted to the right-handed external thread section;

[0016] The driving member is connected to the screw rod, the left-handed external thread section is threadedly connected to the left-handed internal thread hole, and the right-handed external thread section is threadedly connected to the right-handed internal thread hole.

[0017] Optionally, the intermittent coating furnace further includes a guide rail, a first slider and a second slider, the first slider is mounted on the first heating outer shell and is slidably connected to the guide rail, and the second slider is mounted on the second heating outer shell and is slidably connected to the guide rail.

[0018] In the present invention, a storage space for accommodating battery positive electrode materials is provided on the furnace core, and the first heating shell and the second heating shell are both installed on a driving mechanism, and the driving mechanism is used to drive the first heating shell and the second heating shell to close or separate; when the driving mechanism drives the first heating shell and the second heating shell to close, the furnace core is located in the heating space synthesized by the first heating shell and the second heating shell, so that the first heating shell and the second heating shell can heat the furnace core in the heating space, thereby achieving the technical effect of heating and coating the battery positive electrode material in the storage space.

[0019] After the battery positive electrode material in the furnace is heated, the drive mechanism drives the first and second heating shells to separate, exposing the coating furnace to the external environment, thereby accelerating the cooling of the battery positive electrode material in the furnace. In the present invention, the intermittent coating furnace has a simple structure, occupies a small space, has a high cooling efficiency, and accelerates the production efficiency of battery positive electrode materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a radial cross-sectional view of an intermittent coating furnace provided by one embodiment of the present invention in a closed state;

[0022] Figure 2 This is a radial cross-sectional view of an intermittent coating furnace provided by one embodiment of the present invention in a separated state;

[0023] Figure 3 This is an axial cross-sectional view of an intermittent coating furnace provided by one embodiment of the present invention when it is in a closed state.

[0024] The reference numerals in the specification are as follows:

[0025] 1. First heating shell; 11. First insulation layer; 12. First heating layer; 13. First outer shell; 2. Second heating shell; 21. Second insulation layer; 22. Second heating layer; 23. Second outer shell; 3. Furnace core; 31. Accommodation space; 4. Support frame; 41. First support base; 42. Second support base; 43. Support platform; 5. Heating space. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] It should be understood that the terms "upper", "lower", "left", "right", "front", "back", "middle", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 of the present invention.

[0028] like Figures 1 to 3 As shown, an intermittent coating furnace provided by an embodiment of the present invention includes a driving mechanism, a first heating shell 1, a second heating shell 2 and a furnace core 3, and the furnace core 3 is provided with a receiving space 31 for receiving the positive electrode material of the battery; it can be understood that the first heating shell 1 and the second heating shell 2 are both semi-cylindrical shells, and the driving mechanism includes but is not limited to a screw nut mechanism, a belt mechanism and a chain mechanism.

[0029] The first heat-generating housing 1 and the second heat-generating housing 2 are both mounted on the driving mechanism, and the driving mechanism is used to drive the first heat-generating housing 1 and the second heat-generating housing 2 to close or separate; it can be understood that the driving mechanism can drive the first heat-generating housing 1 and the second heat-generating housing 2 to move closer to or away from each other.

[0030] When the first heat-generating housing 1 and the second heat-generating housing 2 are closed, the furnace 3 is located in a heating space 5 enclosed by the first heat-generating housing 1 and the second heat-generating housing 2 .

[0031] In the present invention, a storage space 31 for accommodating battery positive electrode materials is provided on the furnace 3, and the first heating shell 1 and the second heating shell 2 are both installed on a driving mechanism, and the driving mechanism is used to drive the first heating shell 1 and the second heating shell 2 to close or separate; when the driving mechanism drives the first heating shell 1 and the second heating shell 2 to close, the furnace 3 is located in the heating space 5 synthesized by the first heating shell 1 and the second heating shell 2, so that the first heating shell 1 and the second heating shell 2 can heat the furnace 3 in the heating space 5, thereby achieving the technical effect of heating and coating the battery positive electrode material in the storage space 31.

[0032] After the battery positive electrode material in the furnace 3 is heated, the driving mechanism drives the first heating housing 1 and the second heating housing 2 to separate, exposing the coating furnace to the external environment, thereby accelerating the cooling of the battery positive electrode material in the furnace 3. In the present invention, the intermittent coating furnace has a simple structure, occupies a small space, has a high cooling efficiency, and accelerates the production efficiency of battery positive electrode materials.

[0033] In one embodiment, if Figures 1 to 3 As shown, the first heat-generating shell 1 includes a first thermal insulation layer 11, a first heating layer 12 and a first outer shell 13 provided with a first groove. The first thermal insulation layer 11 is attached to the inner wall of the first groove, and the first heating layer 12 is attached to the end of the first thermal insulation layer 11 away from the first outer shell 13; it can be understood that the first thermal insulation layer 11 is located between the first outer shell 13 and the first heating layer 12; the first heating layer 12 includes but is not limited to heating wires, heating plates, etc.; the first thermal insulation layer 11 includes but is not limited to thermal insulation cotton, etc.

[0034] The second heat-generating housing 2 includes a second insulation layer 21, a second heating layer 22, and a second outer shell 23 having a second groove. The second insulation layer 21 is attached to the inner wall of the second groove, and the second heating layer 22 is attached to the end of the second insulation layer 21 facing away from the second outer shell 23. It is understood that the second insulation layer 21 is located between the first outer shell 13 and the first heating layer 12; the first heating layer 12 includes, but is not limited to, heating wires, a heating plate, etc.; the second insulation layer 21 includes, but is not limited to, thermal insulation cotton, etc.; when the first heat-generating housing 1 and the second heat-generating housing 2 are closed, the first groove and the second groove together enclose the heating space 5.

[0035] In this embodiment, after the first outer shell 13 and the second outer shell 23 are closed, the first heating layer 12 and the second heating layer 22 are energized, so that the first heating layer 12 and the second heating layer 22 can heat the furnace 3, and the first thermal insulation layer 11 and the second thermal insulation layer 21 can play a technical effect of thermal insulation, thereby improving the heating efficiency of the intermittent coating furnace.

[0036] In one embodiment, if Figure 2 and Figure 3 As shown, the intermittent coating furnace further includes a support frame 4, on which the furnace 3 is mounted. It is understood that when the first heating housing 1 and the second heating housing 2 are closed, the opposite ends of the support frame 4 extend from the opposite ends of the heating space 5. The support frame 4 can support the furnace 3.

[0037] In one embodiment, if Figure 3 As shown, the support frame 4 includes a first support seat 41, a second support seat 42 and a support platform 43 installed between the first support seat 41 and the second support seat 42, and the furnace 3 is installed on the support platform 43; it can be understood that the support platform 43 is supported on the ground by the first support seat 41 and the second support seat 42.

[0038] When the first heat shell 1 and the second heat shell 2 are closed, the first support seat 41 and the second support seat 42 are both located outside the heating space 5. It can be understood that the opposite ends of the support table 43 extend from the axial ends of the heating space 5. In this embodiment, the intermittent coating furnace has simple structure and low manufacturing cost.

[0039] In an embodiment, the support frame 4 further comprises a transmission member (not shown in the figure) mounted on the support table 43, which is used to drive the furnace tube 3 to move on the support table 43. It can be understood that the transmission member includes but is not limited to a transmission belt mechanism, a transmission roller mechanism, etc.; the transmission member can drive the furnace tube 3 to move from a non-heating station on the support table 43 to a heating station, thereby facilitating the transmission of the furnace tube 3 to the next station.

[0040] In an embodiment, the driving mechanism comprises a driving member, a first nut, a second nut, and a screw rod provided with a left-handed external thread section and a right-handed external thread section; the first nut is mounted on the first heat shell 1 and is provided with a left-handed internal thread hole matched with the left-handed external thread section; the second nut is mounted on the second heat shell 2 and is provided with a right-handed internal thread hole matched with the right-handed external thread section; it can be understood that the left-handed external thread section and the right-handed external thread section are arranged on the screw rod in an interval; the rotating driving member includes but is not limited to a speed reducer motor, etc.

[0041] The driving member is connected to the screw rod, the left-handed external thread section is threadedly connected with the left-handed internal thread hole, and the right-handed external thread section is threadedly connected with the right-handed internal thread hole.

[0042] Specifically, the driving member drives the screw rod to rotate, the screw rod drives the first heat shell 1 to move through the first nut, and the second thread drives the second heat shell 2 to move; the first heat shell 1 and the second heat shell 2 can move close to or away from each other. In this embodiment, the driving mechanism has simple structure and low manufacturing cost.

[0043] In an embodiment, the intermittent coating furnace further comprises a guide rail, a first sliding block, and a second sliding block; the first sliding block is mounted on the first heat shell 1 and is in sliding connection with the guide rail, and the second sliding block is mounted on the second heat shell 2 and is in sliding connection with the guide rail. It can be understood that, during the movement of the first heat shell 1 and the second heat shell 2 driven by the driving mechanism, the first heat shell 1 moves on the guide rail through the first sliding block, and the second heat shell 2 moves on the guide rail through the second sliding block, thereby ensuring the stability of the movement of the first heat shell 1 and the second heat shell 2.

[0044] The above is only an embodiment of the intermittent coating furnace of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An intermittent coating furnace, characterized in that: It includes a driving mechanism, a first heating shell, a second heating shell and a furnace, wherein the furnace is provided with a receiving space for receiving the positive electrode material of the battery; The first heat-generating housing and the second heat-generating housing are both mounted on the driving mechanism, and the driving mechanism is used to drive the first heat-generating housing and the second heat-generating housing to close or separate; When the first heat-generating housing and the second heat-generating housing are closed, the furnace is located in a heating space enclosed by the first heat-generating housing and the second heat-generating housing.

2. The intermittent coating furnace according to claim 1, characterized in that: The first heat-generating housing includes a first heat-insulating layer, a first heating layer, and a first housing body having a first groove, wherein the first heat-insulating layer is attached to an inner wall of the first groove, and the first heating layer is attached to an end of the first heat-insulating layer away from the first housing body; The second heat-generating shell includes a second insulation layer, a second heating layer and a second outer shell with a second groove. The second insulation layer is attached to the inner wall of the second groove, and the second heating layer is attached to one end of the second insulation layer away from the second outer shell.

3. The intermittent coating furnace according to claim 1, characterized in that: The intermittent coating furnace further comprises a support frame, and the furnace core is mounted on the support frame.

4. The intermittent coating furnace according to claim 3, characterized in that: The support frame includes a first support base, a second support base, and a support platform installed between the first support base and the second support base, and the furnace is installed on the support platform; When the first heat-generating housing and the second heat-generating housing are closed, the first support base and the second support base are both located outside the heating space.

5. The intermittent coating furnace according to claim 4, characterized in that: The support frame further includes a transmission member installed on the support platform, and the transmission member is used to drive the furnace to move on the support platform.

6. The intermittent coating furnace according to claim 1, characterized in that: The driving mechanism includes a driving member, a first nut, a second nut, and a screw having a left-handed external thread section and a right-handed external thread section; the first nut is mounted on the first heating housing and is provided with a left-handed internal thread hole adapted to the left-handed external thread section; the second nut is mounted on the second heating housing and is provided with a right-handed internal thread hole adapted to the right-handed external thread section; The driving member is connected to the screw rod, the left-handed external thread section is threadedly connected to the left-handed internal thread hole, and the right-handed external thread section is threadedly connected to the right-handed internal thread hole.

7. The intermittent coating furnace according to claim 1, characterized in that: The intermittent coating furnace further includes a guide rail, a first slider and a second slider, wherein the first slider is mounted on the first heating outer shell and is slidably connected to the guide rail, and the second slider is mounted on the second heating outer shell and is slidably connected to the guide rail.

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