Battery cell pole roll baking equipment

Abstract

The utility model provides battery cell pole roll baking equipment which comprises a baking chamber, a sealing door and a gas circulation assembly, and the sealing door is used for sealing a battery cell pole roll inlet and outlet of the baking chamber when a battery cell pole roll is baked; the gas circulation assembly is used for continuously inputting clean nitrogen into the baking chamber through the first gas inlet and continuously discharging the nitrogen through the first gas outlet so that the nitrogen can circulate in the baking chamber, and the first gas inlet and the first gas outlet are located in the left side and the right side, opposite to each other, of the interior of the baking chamber correspondingly. The gas circulation assembly is further used for maintaining the pressure in the baking cavity to be preset pressure which is slightly larger than the external atmospheric pressure. A heating pipe is arranged on the rear side wall of the baking cavity and used for heating nitrogen entering the baking cavity. According to the equipment, the problems of high energy consumption and long baking time of traditional baking equipment are solved, and the problems of material loosening and even base material falling risks caused by the baking process of traditional negative pressure baking equipment are solved.

Description

Technical Field

[0001] The utility model generally relates to the technical field of lithium batteries, and more specifically, relates to a battery cell pole coil baking device. Background Art

[0002] With the rapid development of the new energy industry, lithium batteries, as core energy storage components, have a performance and technical level that is directly related to the competitiveness and market position of products. The traditional battery cell pole coil baking process has problems such as high energy consumption and long baking time. In addition, the traditional battery cell pole coil baking process uses vacuum baking (i.e. negative pressure baking) to remove water. The main principle is to apply negative pressure to the battery cell pole piece to forcibly extract the water in the pole piece to achieve the effect of water removal. In this process, the negative pressure will cause the material to loosen and even the risk of the substrate falling off.

[0003] In view of this, there is an urgent need to provide a baking device that is different from the traditional negative pressure baking method to solve the problem. Utility Model Content

[0004] In order to at least solve one or more technical problems in the above-mentioned background technology, the utility model proposes a battery cell pole coil baking device.

[0005] To this end, the utility model provides the following technical solutions.

[0006] The utility model discloses a battery cell pole roll baking device, comprising: a baking chamber, a sealing door and a gas circulation component, wherein the sealing door is used to seal the battery cell pole roll inlet and outlet of the baking chamber when baking the battery cell pole roll; the gas circulation component is used to continuously input clean nitrogen into the baking chamber through a first air inlet, and continuously discharge nitrogen through a first exhaust port to allow the nitrogen to circulate in the baking chamber, the first air inlet and the first exhaust port are respectively located on opposite left and right sides of the baking chamber, the gas circulation component is also used to maintain the pressure in the baking chamber at a preset pressure, and the preset pressure is slightly greater than the external atmospheric pressure; a heating tube is provided on the rear side wall of the baking chamber, and the heating tube is used to heat the nitrogen entering the baking chamber.

[0007] Preferably, levers and auxiliary arms are hinged on both sides of the sealing door, the other end of each lever is hinged to the telescopic end of the driving cylinder, the fixed end of the driving cylinder is hinged to the frame of the equipment, and the other end of each auxiliary arm is hinged to the frame.

[0008] Preferably, a lock buckle is further included, and when the sealing door seals the baking chamber, the lock buckle is used to lock the sealing door.

[0009] Preferably, a first proportional flow valve is provided on the nitrogen pipeline connected to the first air inlet, and a second proportional flow valve is provided on the nitrogen pipeline connected to the first exhaust port; when the pressure in the baking chamber is a preset pressure, the amount of nitrogen passing through the first proportional flow valve and the amount of nitrogen passing through the second proportional flow valve are the same to maintain the pressure in the baking chamber at the preset pressure.

[0010] Preferably, a hot air gun is further provided on the nitrogen pipeline connected to the first air inlet, and the hot air gun is used to preheat the nitrogen that is about to enter the baking chamber.

[0011] Preferably, it also includes a pressure relief valve connected to the baking chamber, and the pressure relief valve is used to timely relieve the pressure until the pressure in the baking chamber is lower than the preset pressure, so that the amount of nitrogen passing through the first proportional flow valve is greater than the amount of nitrogen passing through the second proportional flow valve, and the pressure in the baking chamber gradually reaches the preset pressure; when the pressure in the baking chamber is greater than the preset pressure, the pressure relief valve is also used to relieve the pressure in the baking chamber.

[0012] Preferably, porous air outlet plates are provided on the left and right sides of the baking chamber.

[0013] Preferably, a cooling assembly is further included, and the cooling assembly is used to cool the baked battery cell pole coil before opening the sealing door.

[0014] Preferably, the cooling assembly is disposed below the baking chamber.

[0015] Preferably, the cooling component includes a second air inlet and a second exhaust port for connecting to the baking chamber, the second air inlet and the second exhaust port are respectively located on the upper and lower sides of the baking chamber, and further includes a blower, the air outlet of the blower is connected to the second air inlet, and the impeller inlet of the blower is connected to the second exhaust port, so that the nitrogen used to cool the battery cell pole rolls circulates in the baking chamber; a condenser is provided between the impeller inlet of the blower and the second exhaust port, and the condenser is used to cool the nitrogen discharged from the second exhaust port.

[0016] The technical solution provided by this application may have the following beneficial effects:

[0017] This equipment continuously inputs clean nitrogen into the baking chamber while continuously exhausting nitrogen to allow the nitrogen to circulate in the baking chamber, and maintains the pressure in the baking chamber slightly greater than the external atmospheric pressure, so that the pressure in the baking chamber remains in a positive pressure state, thereby changing the problems of high energy consumption and long baking time in traditional baking equipment, and also solving the problems of material relaxation and even the risk of substrate falling off caused by traditional negative pressure baking equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, among which:

[0019] Figure 1 It is a stereogram showing an embodiment of the utility model;

[0020] Figure 2 It is a left view showing an embodiment of the utility model;

[0021] Figure 3 1. It is a diagram showing the internal structure of a baking chamber of an embodiment of the utility model;

[0022] Explanation of the reference numerals: 11, baking chamber; 12, sealing door; 21, lever; 22, auxiliary arm; 23, driving cylinder; 24, frame; 31, lock; 71, multi-hole air outlet plate; 101, blower; 102, condenser. DETAILED DESCRIPTION

[0023] Embodiments will now be described with reference to the accompanying drawings. It should be understood that for simplicity and clarity of explanation, reference numerals may be repeated in the accompanying drawings to indicate corresponding or similar elements where deemed appropriate. In addition, the utility model sets forth many specific details in order to provide a thorough understanding of the embodiments described herein. However, it will be appreciated by those of ordinary skill in the art that the embodiments described herein may be practiced without these specific details. In other cases, well-known methods, processes, and components are not described in detail to avoid obscuring the embodiments described herein. Moreover, the description should not be construed as limiting the scope of the embodiments described herein.

[0024] refer to Figures 1 to 3 According to an embodiment of the utility model, a battery cell pole roll baking device is provided, comprising: a baking chamber 11, a sealing door 12 and a gas circulation component, wherein the sealing door 12 is used to seal the battery cell pole roll inlet and outlet of the baking chamber 11 when baking the battery cell pole roll; the gas circulation component is used to continuously input clean nitrogen into the baking chamber 11 through a first air inlet, and continuously discharge nitrogen through a first exhaust port to allow the nitrogen to circulate in the baking chamber 11, the first air inlet and the first exhaust port are respectively located on opposite left and right sides of the baking chamber 11, the gas circulation component is also used to maintain the pressure in the baking chamber 11 at a preset pressure, which is slightly greater than the external atmospheric pressure; a heating tube is provided on the rear side wall of the baking chamber 11, and the heating tube is used to heat the nitrogen entering the baking chamber 11.

[0025] The specific method of sealing the baking chamber 11 by the sealing door 12 mentioned above is that a lever 21 and an auxiliary arm 22 can be hinged on both sides of the sealing door 12, the other end of each lever 21 is hinged to the telescopic end of the driving cylinder 23, the fixed end of the driving cylinder 23 is hinged to the frame 24 of the equipment, and the other end of each auxiliary arm 22 is hinged to the frame 24.

[0026] In the above embodiment, a lock catch 31 is further included. When the sealing door 12 seals the baking chamber 11, the lock catch 31 is used to lock the sealing door 12. The lock catch 31 is provided, that is, after the lever 21 and the auxiliary arm 22 controlled by the driving cylinder 23 control the sealing of the sealing door 12, the lock catch 31 is provided to further fix the sealing door 12, thereby improving the sealing effect and providing safety protection to prevent the baking chamber 11 from leaking due to a gap between the baking chamber 11 and the sealing door 12 caused by the positive pressure in the baking chamber 11.

[0027] In one embodiment, a first proportional flow valve is provided on the nitrogen pipeline connected to the first air inlet, and a second proportional flow valve is provided on the nitrogen pipeline connected to the first exhaust port; when the pressure in the baking chamber 11 is a preset pressure, the amount of nitrogen passing through the first proportional flow valve is the same as the amount of nitrogen passing through the second proportional flow valve to maintain the pressure in the baking chamber 11 at the preset pressure.

[0028] It can be understood that, in the initial state, the pressure in the baking chamber 11 is normal pressure, and the gas therein is replaced by introducing nitrogen at the first air inlet. During the replacement process, it is necessary to keep the first exhaust port to discharge nitrogen normally, and the amount of nitrogen introduced is the same as the amount of nitrogen discharged; after the gas in the baking chamber 11 is replaced, the amount of nitrogen passing through the first proportional flow valve is greater than the amount of nitrogen passing through the second proportional flow valve, so that the pressure in the baking chamber 11 gradually increases to a preset pressure. At this time, to maintain the preset pressure value, it is only necessary to make the amount of nitrogen passing through the first proportional flow valve and the amount of nitrogen passing through the second proportional flow valve the same, thereby maintaining the baking chamber 11 in a positive pressure state.

[0029] In the above embodiment, a heat gun is also provided on the nitrogen pipeline connected to the first air inlet, and the heat gun is used to preheat the nitrogen that is about to enter the baking chamber 11. Preheating the nitrogen entering the baking chamber 11 reduces the heating time of the nitrogen after entering the baking chamber 11, which helps to improve the baking efficiency of the battery cell pole coil.

[0030] In one embodiment, a pressure relief valve connected to the baking chamber 11 is further included, and the pressure relief valve is used to timely release pressure until the pressure in the baking chamber 11 is lower than the preset pressure, so that the amount of nitrogen passing through the first proportional flow valve is greater than the amount of nitrogen passing through the second proportional flow valve, and the pressure in the baking chamber 11 gradually reaches the preset pressure. Here, after timely pressure release, the pressure value in the baking chamber 11 is lower than the external air pressure, and then the pressure in the baking chamber 11 gradually reaches the preset pressure by controlling the amount of nitrogen entering to be greater than the amount of nitrogen discharged. In this process, it is helpful to take the moisture baked out of the baking chamber 11 by means of nitrogen discharge.

[0031] In addition, when the pressure in the baking chamber 11 is greater than a preset pressure, the pressure relief valve is also used to relieve the pressure in the baking chamber 11 to improve the safety of the equipment.

[0032] In another embodiment, porous air outlet plates 71 are provided on the left and right sides of the baking chamber 11. The purpose of the porous air outlet plates 71 is to allow nitrogen to enter the baking chamber 11 and spread throughout the baking chamber 11, thereby improving the uniformity of nitrogen passing through the battery cell pole coil and improving the baking effect.

[0033] In yet another embodiment, a cooling assembly is further included, and the cooling assembly is used to cool the baked battery cell pole coil before opening the sealing door 12.

[0034] In the above embodiment, the cooling assembly is arranged below the baking chamber 11. Since the air duct used for cooling is prone to produce condensed water during the cooling process of the battery cell pole coil after baking, the cooling assembly is arranged below the baking chamber 11 to prevent the condensed water from flowing into the baking chamber 11, thereby avoiding affecting the baking of the battery cell pole coil.

[0035] Specifically, in one embodiment, the cooling assembly may include a second air inlet and a second exhaust port for communicating with the baking chamber 11, the second air inlet and the second exhaust port are respectively located at the upper and lower sides of the baking chamber 11, and further includes a blower 101, the air outlet of the blower 101 is communicated with the second air inlet, and the impeller inlet of the blower 101 is communicated with the second exhaust port, so that the nitrogen used to cool the battery cell pole roll circulates in the baking chamber 11; a condenser 102 is provided between the impeller inlet of the blower 101 and the second exhaust port, and the condenser 102 is used to cool the nitrogen exhausted from the second exhaust port. Since cold air is heavy and hot air is light, the second air inlet is arranged on the upper side of the baking chamber 11, and the second exhaust port is arranged on the lower side of the baking chamber 11.

[0036] The cooling air duct mentioned above is used to connect the air outlet of the blower 101 and the second air inlet. The air duct is also used to connect the second exhaust port and the impeller inlet of the blower 101. The condenser 102 is arranged on the loop of the air duct.

[0037] It should be understood that the possible terms "first" or "second" etc. in the claims, specifications and drawings disclosed in the utility model are used to distinguish different objects, rather than to describe a specific order. The terms "include" and "comprise" used in the specifications and claims disclosed in the utility model indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections.

[0038] It should also be understood that the terms used in this utility model disclosure specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model disclosure. As used in the utility model disclosure specification and claims, the singular forms of "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise. It should also be further understood that the term "and / or" used in the utility model disclosure specification and claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0039] Although the implementation methods of the utility model are as above, the above contents are only examples adopted to facilitate the understanding of the utility model, and are not intended to limit the scope and application scenarios of the utility model. Any technician in the technical field described in the utility model can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed by the utility model, but the scope of patent protection of the utility model shall still be based on the scope defined by the attached claims.

Claims

1. A battery cell coil baking device, characterized in that: include: A baking chamber (11), a sealing door (12) and a gas circulation component, wherein the sealing door (12) is used to seal the cell pole roll inlet and outlet of the baking chamber (11) when baking the cell pole roll; the gas circulation component is used to continuously input clean nitrogen into the baking chamber (11) through a first air inlet, and continuously discharge nitrogen through a first exhaust port so that the nitrogen circulates in the baking chamber (11), the first air inlet and the first exhaust port are respectively located on opposite left and right sides of the baking chamber (11), and the gas circulation component is also used to maintain the pressure in the baking chamber (11) at a preset pressure, wherein the preset pressure is greater than the external atmospheric pressure; a heating pipe is provided on the rear side wall of the baking chamber (11), and the heating pipe is used to heat the nitrogen entering the baking chamber (11).

2. The battery cell coil baking device according to claim 1, characterized in that: The sealing door (12) is hingedly provided with a lever (21) and an auxiliary arm (22) on both sides thereof, the other end of each lever (21) is hingedly connected to the telescopic end of a driving cylinder (23), the fixed end of the driving cylinder (23) is hingedly connected to a frame (24) of the equipment, and the other end of each auxiliary arm (22) is hingedly connected to the frame (24).

3. The battery cell coil baking device according to claim 2, characterized in that: It also comprises a lock buckle (31), and when the sealing door (12) seals the baking chamber (11), the lock buckle (31) is used to lock the sealing door (12).

4. The battery cell coil baking device according to claim 1, characterized in that: A first proportional flow valve is provided on the nitrogen pipeline connected to the first air inlet, and a second proportional flow valve is provided on the nitrogen pipeline connected to the first exhaust port; when the pressure in the baking chamber (11) is a preset pressure, the amount of nitrogen passing through the first proportional flow valve and the amount of nitrogen passing through the second proportional flow valve are the same, so as to maintain the pressure in the baking chamber (11) at the preset pressure.

5. The battery cell coil baking device according to claim 4, characterized in that: A hot air gun is also provided on the nitrogen pipeline connected to the first air inlet, and the hot air gun is used to preheat the nitrogen that is about to enter the baking chamber (11).

6. The battery cell coil baking device according to claim 4, characterized in that: It also includes a pressure relief valve connected to the baking chamber (11), and the pressure relief valve is used to timely relieve the pressure until the pressure in the baking chamber (11) is lower than the preset pressure, so that the amount of nitrogen passing through the first proportional flow valve is greater than the amount of nitrogen passing through the second proportional flow valve, and the pressure in the baking chamber (11) gradually reaches the preset pressure; when the pressure of the baking chamber (11) is greater than the preset pressure, the pressure relief valve is also used to relieve the pressure of the baking chamber (11).

7. The battery cell coil baking device according to claim 1, characterized in that: Multi-hole air outlet plates (71) are provided on the left and right sides opposite to each other inside the baking chamber (11).

8. The battery cell coil baking device according to claim 1, characterized in that: It also comprises a cooling assembly, which is used to cool the baked battery cell pole coil before opening the sealing door (12).

9. The battery cell coil baking device according to claim 8, characterized in that: The cooling component is arranged below the baking chamber (11).

10. The battery cell coil baking device according to claim 9, characterized in that: The cooling component comprises a second air inlet and a second air outlet for communicating with the baking chamber (11), the second air inlet and the second air outlet being located at the upper side and the lower side of the baking chamber (11) respectively, and further comprises a blower (101), the air outlet of the blower (101) being communicated with the second air inlet, and the impeller inlet of the blower (101) being communicated with the second air outlet, so that nitrogen for cooling the battery cell pole rolls circulates in the baking chamber (11); a condenser (102) is provided between the impeller inlet of the blower (101) and the second air outlet, and the condenser (102) is used to cool the nitrogen exhausted from the second air outlet.

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