Drying furnace for battery production

Abstract

The utility model discloses a drying furnace for battery production relates to the field of battery production, including equipment main part, a plurality of vacuum drying chamber is installed on equipment main part, is provided with the heating tray in the vacuum drying chamber, and the vacuum drying chamber includes heating platform, and the heating tray includes tray frame, and the tray frame is fixed with the temperature -rising oil tank, and the temperature -rising oil tank is filled with heat -conducting oil, and the temperature -rising oil tank top is fixed with the grid limit support, and a plurality of batteries to be handled are placed in the grid limit support, and the grid limit support is provided with the empty cavity, and a plurality of heating oil sacs are fixed on the grid limit support, and the grid limit support and temperature -rising oil tank are connected through the oil inlet pipe and the oil outlet pipe. Advantageous effects lie in: through the heating wire heating changes for heat -conducting oil heating, temperature -rising oil tank, grid limit support, oil inlet pipe and oil outlet pipe form the circulation loop, can make the heat -conducting oil after heating constantly fills into the grid limit support like this, keeps the stable of heating temperature, improves dry effect and quality.

Description

Technical Field

[0001] This utility model relates to the field of battery production, and in particular to a drying oven for battery production. Background Technology

[0002] In the manufacturing process of lithium-ion batteries, moisture control is particularly important because excessive moisture content can easily lead to increased internal resistance, low capacity, and poor cycle life, directly affecting battery performance. Therefore, the drying process to remove moisture before electrolyte injection into lithium-ion battery cells is a key process for controlling battery moisture content.

[0003] The current conventional drying method is vacuum furnace contact heating drying, which involves evacuating the space inside the drying chamber and then heating the tray holding the battery to directly heat and dry the battery. This method has beneficial effects such as energy saving, protection of electrode plate materials, and reduction of oxidation reaction.

[0004] For example, patent document CN218210335U discloses a battery drying oven, including a housing; an oven body disposed within the housing, the oven body having a vacuum chamber, a base for placing a battery clamp disposed within the vacuum chamber, a first probe assembly for electrical connection with a power source disposed on the base, a heating element and a second probe assembly disposed on the battery clamp, the battery clamp being detachably disposed in the base, when the battery clamp is mounted on the base, the second probe assembly contacts and is electrically connected to the first probe assembly to supply power to the heating element, a reflective component is disposed around the periphery of the vacuum chamber, an opening communicating with the vacuum chamber is opened on one side of the oven body; and a sealing door disposed on the housing for sealing the opening. The battery drying oven provided in this application can effectively reduce heat loss, improve the heat utilization rate within the vacuum chamber, and effectively improve heating efficiency.

[0005] In existing technologies, contact heating typically uses an electric heating wire hidden inside a separator to generate heat and heat the battery. However, using an electric heating wire has several drawbacks. First, resistance wire heating requires electrical contacts, and high-temperature steam is generated during the drying process, which can easily cause short circuits. Second, the uniformity and temperature stability of the resistance wire heating are both unreliable, resulting in the battery drying effect not meeting expectations. Utility Model Content

[0006] The purpose of this invention is to provide a drying oven for battery production in order to solve the above-mentioned problems.

[0007] This utility model achieves the above objectives through the following technical solutions:

[0008] A drying oven for battery production includes a main body with several vacuum drying chambers. Each vacuum drying chamber contains a heating tray, which includes a drying chamber and a heating platform. The heating tray includes a tray frame with a heating oil tank fixedly connected to it. The bottom of the heating oil tank contacts the heating platform, and the tank is filled with heat-conducting oil. A grid limiting frame is fixedly connected to the top of the heating oil tank, and several batteries to be processed are placed within it. The grid limiting frame has a cavity, and several heating oil bladders are fixedly connected to its surface. The heating oil bladders are made of a heat-resistant and elastic material. The front of the grid limiting frame is connected to the front of the heating oil tank via an oil inlet pipe, and the rear of the grid limiting frame is connected to the rear of the heating oil tank via an oil outlet pipe. A pump assembly is installed on the oil outlet pipe.

[0009] Preferably, the main body of the equipment includes a main support frame, with several closed chamber doors hinged to the front side of the main support frame via connecting rods, and several exhaust pipes fixedly connected to the rear side of the main support frame. The front end of the exhaust pipes extends into the drying chamber, and the other end of the exhaust pipes is connected to a vacuum pump. Several inlet pipes are fixedly connected to the rear side of the main support frame, with the front end of the inlet pipes extending into the drying chamber, and the rear end of the inlet pipes being connected to a nitrogen source.

[0010] Preferably, the vacuum drying chamber also includes several annular reinforcing ribs fixedly connected to the drying chamber, the drying chamber is fixedly connected to the main support, and a front guard plate is fixedly connected to the front end of the drying chamber, and the front guard plate is fixedly connected to the front side of the main support.

[0011] Preferably, the bottom of the tray frame is fixedly connected with several evenly arranged positioning pins, and the drying chamber is fixedly connected with several positioning tubes, with the positioning pins and positioning tubes cooperating to form a limit.

[0012] Preferably, several motors are fixedly connected to the rear side of the main support, a drive gear is fixedly connected to the output end of the motor, and a driven gear is fixedly connected to the input end of the pump assembly. The driven gear can mesh with the drive gear.

[0013] Preferably, two lifting frames are fixedly connected to the pallet frame, and the lifting frames are set as square tubes. An upper protective plate is fixedly connected to the grid limit frame.

[0014] The beneficial effects are as follows: To solve the problems of uneven heating and unstable heating temperature of the heating wire, the heating wire heating is replaced with heat transfer oil heating. The heating oil tank, the grid limiting frame, the oil inlet pipe and the oil outlet pipe form a circulation loop. This allows the heated heat transfer oil to continuously fill the grid limiting frame. When the heating oil bladder comes into contact with the surface of the battery under vacuum pressure, the heating oil bladder transfers the heat of the internal heat transfer oil to the battery, thereby maintaining a stable heating temperature and improving the drying effect and quality.

[0015] The additional technical features and advantages of this utility model will become more apparent from the following description, or may be learned through specific practice of this utility model. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a perspective view of a drying oven for battery production according to the present invention;

[0018] Figure 2 This is a perspective view of the relative positions of the exhaust pipe and the intake pipe of a drying furnace for battery production according to the present invention.

[0019] Figure 3 This is a left sectional view of a drying oven for battery production according to the present invention;

[0020] Figure 4 This is a three-dimensional structural view of the vacuum drying chamber of a drying furnace for battery production as described in this utility model;

[0021] Figure 5 This is a front view of the vacuum drying chamber of a drying furnace for battery production according to the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of the heating tray of a drying oven for battery production according to the present invention;

[0023] Figure 7 This is a perspective view of the relative positions of the oil drain pipe and the pump assembly of a drying furnace for battery production according to the present invention.

[0024] Figure 8 This is a left-side sectional view of the heating tray of a drying oven for battery production according to the present invention;

[0025] Figure 9 yes Figure 3 Enlarged view of point A in the middle.

[0026] The annotations in the attached figures are explained as follows:

[0027] 101. Main support frame; 102. Sealed door; 103. Suction pipe; 104. Inlet pipe; 201. Drying chamber; 202. Annular reinforcing rib; 203. Front guard plate; 204. Heating platform; 205. Positioning pipe; 301. Tray frame; 302. Positioning pin; 303. Heating oil tank; 304. Grid limit frame; 305. Heating oil bladder; 306. Upper protective plate; 307. Oil inlet pipe; 308. Oil outlet pipe; 309. Pump assembly; 310. Driven gear; 311. Motor; 312. Drive gear; 313. Lifting frame; 4. Battery to be processed. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] The present invention will be further described below with reference to the accompanying drawings:

[0031] like Figures 1-9As shown, a drying oven for battery production includes a main body with several vacuum drying chambers. Each vacuum drying chamber contains a heating tray. Each vacuum drying chamber includes a drying chamber 201, and a heating platform 204 is installed within the drying chamber 201. Heating wires (not shown) are installed within the heating platform 204. The heating tray includes a tray frame 301, and a heating oil tank 303 is welded and fixedly connected to the tray frame 301. The bottom of the heating oil tank 303 is in contact with the heating platform 204. The bottom material of the heating oil tank 303 is an alloy material with high thermal conductivity. The heating oil tank 303 is filled with heat-conducting oil. A grid limiting frame 304 is bolted to the top of the heating oil tank 303. Several batteries 4 to be processed are placed in the grid of the grid limiting frame 304. The grid limiting frame 304 is hollow. Several heating oil bladders 305 are glued and fixed to the surface of the grid limiting frame 304. The heating oil bladders 305 are made of heat-resistant and elastic synthetic rubber material. The front side of the grid limiting frame 304 is connected to the front side of the heating oil tank 303 through an oil inlet pipe 307. The rear side of the grid limiting frame 304 is connected to the rear side of the heating oil tank 303 through an oil outlet pipe 307. Connected to pipe 08, a pump assembly 309 is installed on the oil drain pipe 308. The pump assembly 309 is an impeller pump, the structure of which is existing technology and will not be described in detail. To solve the problems of uneven heating and unstable heating temperature of the heating wire, the heating wire heating is changed to heat transfer oil heating. The robot arm places the tray frame 301 into the drying chamber 201, so that the bottom of the heating oil tank 303 contacts the heating platform 204. Then, the drying chamber 201 is evacuated. Since the pressure inside the heating oil tank 303 is greater than the pressure inside the drying chamber 201, the heating oil bladder 305 should contact the surface of the battery 4 to be treated under the action of pressure. The heating platform 204 heats the heat transfer oil in the heating oil tank 303. The pump assembly 309 is started to pump the heated heat transfer oil in the heating oil tank 303 into the internal cavity of the grid limiting frame 304. Then, the heating oil bladder 305 transfers the heat of the heat transfer oil inside to the battery 4 to be treated. In this way, the heating and drying work of the battery 4 to be treated is realized. The heating oil tank 303, the grid limiting frame 304, the oil inlet pipe 307 and the oil outlet pipe 308 form a circulation loop, which allows the heated heat transfer oil to continuously fill the grid limiting frame 304, maintain the stability of the heating temperature, and improve the drying effect and quality.

[0032] The main body of the equipment includes a main support frame 101. Several closed chamber doors 102 are hinged to the front of the main support frame 101 via connecting rods. The connection method between the closed chamber doors 102 and the main support frame 101 is described in the prior art and will not be repeated here. Several exhaust pipes 103 are fixedly connected to the rear of the main support frame 101. The front end of the exhaust pipes 103 extends into the drying chamber 201, and the other end of the exhaust pipes 103 is connected to a vacuum pump. Several inlet pipes 104 are fixedly connected to the rear of the main support frame 101. The front end of the inlet pipes 104 extends into the drying chamber 201, and the rear end of the inlet pipes 104 is connected to a nitrogen source. The vacuum pump outside the exhaust pipes 103 evacuates the environment inside the drying chamber 201 for vacuum drying. The nitrogen source outside the inlet pipes 104 is used to break the vacuum after drying is completed.

[0033] The vacuum drying chamber also includes several annular reinforcing ribs 202 fixedly connected to the drying chamber 201. The drying chamber 201 is fixedly connected to the main support 101. A front guard plate 203 is fixedly connected to the front end of the drying chamber 201. The front guard plate 203 is fixedly connected to the front side of the main support 101. The annular reinforcing ribs 202 enhance the structural strength of the drying chamber 201 and prevent deformation due to external pressure caused by the internal vacuum environment.

[0034] The bottom of the pallet rack 301 is fixedly connected with several evenly arranged positioning pins 302, and the drying chamber 201 is fixedly connected with several positioning tubes 205. The positioning pins 302 and the positioning tubes 205 cooperate to form a limit, and the positioning tubes 205 and the positioning pins 302 achieve precise positioning during the placement of the pallet rack 301.

[0035] Several motors 311 are fixedly connected to the rear side of the main support 101. The output end of the motor 311 is fixedly connected to the drive gear 312. The input end of the pump assembly 309 is fixedly connected to the driven gear 310. The driven gear 310 can mesh with the drive gear 312. After the heating bracket is placed in the drying chamber 201, under the positioning effect of the positioning tube 205 and the positioning pin 302, the driven gear 310 can mesh with the drive gear 312. Thus, the motor 311 can drive the pump assembly 309 to work. The pump assembly 309 can pump the heat transfer oil in the heating oil tank 303 into the grid limit frame 304.

[0036] Two lifting frames 313 are fixedly connected to the pallet frame 301. The lifting frames 313 are set in square tube shape. An upper protective plate 306 is fixedly connected to the grid limit frame 304. The lifting frames 313 can not only support the grid limit frame 304, but also cooperate with the fork on the robot arm to facilitate the robot arm to move the heating tray.

[0037] Working principle: The robotic arm places the tray frame 301 into the drying chamber 201. During this process, the positioning tube 205 and the positioning pin 302 achieve precise positioning of the tray frame 301. This ensures that the bottom of the heating oil tank 303 contacts the heating platform 204, allowing the driven gear 310 to mesh with the driving gear 312. Then, the sealing door 102 closes, and the vacuum pipe 103 evacuates the drying chamber 201. Because the pressure inside the heating oil tank 303 is greater than the pressure inside the drying chamber 201, the heating oil bladder 305 should contact the surface of the battery 4 to be treated under pressure. The heating platform 204 heats the heat transfer oil in the heating oil tank 303. The motor 3... 11 drives the active gear 312 to rotate, which in turn drives the driven gear 310 to rotate. The driven gear 310 drives the pump assembly 309 to work. The pump assembly 309 starts to pump the heated heat transfer oil in the heating oil tank 303 into the internal cavity of the grid limiting frame 304. Then, the heating oil bladder 305 transfers the heat of the heat transfer oil inside to the battery 4 to be treated. In this way, the heating and drying work of the battery 4 to be treated is realized. The heating oil tank 303, the grid limiting frame 304, the oil inlet pipe 307 and the oil outlet pipe 308 form a circulation loop, which allows the heated heat transfer oil to continuously fill the grid limiting frame 304, maintain the stability of the heating temperature, and improve the drying effect and quality.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A drying oven for battery production, comprising a main body of equipment, wherein a plurality of vacuum drying chambers are installed on the main body of equipment, characterized in that: A heating tray is provided inside the vacuum drying chamber. The vacuum drying chamber includes a drying chamber (201), and a heating platform (204) is provided inside the drying chamber (201). The heating tray includes a tray frame (301), and a heating oil tank (303) is fixedly connected to the tray frame (301). The bottom of the heating oil tank (303) can contact the heating platform (204). The heating oil tank (303) is filled with heat transfer oil, and a grid limiting frame (304) is fixedly connected to the top of the heating oil tank (303). A grid limiting frame (304) is placed inside the grid limiting frame (304). Several batteries to be processed (4) are provided. The grid limiting frame (304) is set with a cavity. Several heating oil bladders (305) are fixedly connected to the surface of the grid limiting frame (304). The heating oil bladders (305) are made of heat-resistant and elastic material. The front side of the grid limiting frame (304) is connected to the front side of the heating oil tank (303) through an oil inlet pipe (307). The rear side of the grid limiting frame (304) is connected to the rear side of the heating oil tank (303) through an oil drain pipe (308). A pump assembly (309) is installed on the oil drain pipe (308).

2. The drying oven for battery production according to claim 1, characterized in that: The main body of the equipment includes a main support frame (101). Several closed chamber doors (102) are hinged to the front side of the main support frame (101) via connecting rods. Several exhaust pipes (103) are fixedly connected to the rear side of the main support frame (101). The front end of the exhaust pipe (103) extends into the drying chamber (201), and the other end of the exhaust pipe (103) is connected to a vacuum pump. Several air inlet pipes (104) are fixedly connected to the rear side of the main support frame (101). The front end of the air inlet pipe (104) extends into the drying chamber (201), and the rear end of the air inlet pipe (104) is connected to a nitrogen source.

3. A drying oven for battery production according to claim 2, characterized in that: The vacuum drying chamber also includes several annular reinforcing ribs (202) fixedly connected to the drying chamber (201). The drying chamber (201) is fixedly connected to the main support (101). A front guard plate (203) is fixedly connected to the front end of the drying chamber (201). The front guard plate (203) is fixedly connected to the front side of the main support (101).

4. A drying oven for battery production according to claim 3, characterized in that: The bottom of the tray frame (301) is fixedly connected with several evenly arranged positioning pins (302), and the drying chamber (201) is fixedly connected with several positioning tubes (205). The positioning pins (302) and the positioning tubes (205) cooperate to form a limit.

5. A drying oven for battery production according to claim 2, characterized in that: A number of motors (311) are fixedly connected to the rear side of the main support (101). A drive gear (312) is fixedly connected to the output end of the motor (311). A driven gear (310) is fixedly connected to the input end of the pump assembly (309). The driven gear (310) can mesh with the drive gear (312).

6. A drying oven for battery production according to claim 1, characterized in that: Two lifting frames (313) are fixedly connected to the pallet frame (301). The lifting frames (313) are configured as square tubes. An upper protective plate (306) is fixedly connected to the grid limiting frame (304).

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