Battery cell vacuum drying furnace
By using parallel heating pipes and fluid medium heating in a vacuum drying oven, the overheating problem caused by resistance wire heating was solved, achieving battery quality stability and safety, and ensuring the consistency of cell drying effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CALB GROUP CO LTD
- Filing Date
- 2025-04-09
- Publication Date
- 2026-06-26
AI Technical Summary
Existing technologies using resistance wire heating methods are prone to causing overheating risks that can lead to short circuits in the battery, thus affecting battery quality.
Multiple parallel heating pipelines are used, and the fluid medium flows in the pipeline to heat the heating plate. The boiling point of the fluid medium is fixed to avoid overheating and ensure that the heating plate temperature is uniform. Water is used as the fluid medium to control the temperature below 100℃.
This effectively avoids the risk of battery short circuits, ensures the consistency and safety of cell drying, and reduces potential risks in battery production.
Smart Images
Figure CN224415552U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and in particular to a vacuum drying oven for battery cells. Background Technology
[0002] In the battery manufacturing process, the quality of the battery electrodes directly affects the battery's performance. During battery manufacturing, the prepared battery cells need to be dried in a drying oven to improve the quality of the positive and negative electrode plates. Currently, the heating plates in vacuum drying ovens typically use a resistance wire arrangement for heating, where the resistance wires heat the heating plate, which in turn heats the battery cells. However, this resistance wire heating method is prone to overheating, which can lead to a short circuit in the battery. Utility Model Content
[0003] This invention provides a vacuum drying furnace for battery cells, which can solve the overheating problem caused by resistance wire heating in the prior art, and helps to ensure battery quality.
[0004] This utility model provides a battery cell vacuum drying oven, including an oven body, in which multiple heating plates are provided. The multiple heating plates are spaced apart along the height direction of the oven body. Each heating plate is used to place a battery cell and heat the battery cell.
[0005] Each of the heating plates has multiple parallel heating pipes embedded inside, which are arranged along a first direction. A fluid medium flows inside the heating pipes, and the heating plates are heated by the fluid medium.
[0006] The heating pipeline includes an inlet and an outlet, which are located on the same side of the heating plate, and the inlet and outlet of each heating pipeline are arranged adjacent to each other.
[0007] The vacuum drying oven for battery cells in this invention features multiple parallel heating pipes within a heating plate, each carrying a fluid medium. As the fluid medium flows through these pipes, it exchanges heat with the heating plate, thus heating it. When a battery cell is placed on the heating plate, the high temperature of the plate heats it. Because the inlet and outlet of each heating pipe are adjacent, the flow path of the fluid medium is shortened, resulting in a more uniform temperature across the heating pipes. This ensures a consistent temperature across the heating plate and guarantees uniform drying of all battery cells. Furthermore, since the fluid medium has a fixed boiling point, it will not continue to rise after reaching its boiling point, thus limiting the temperature of the heating plate to a certain range. This prevents damage to the battery cells or short circuits caused by overheating of the heating plate. Attached Figure Description
[0008] Figure 1 This is a schematic diagram of a vacuum drying furnace for battery cells in an embodiment of this utility model;
[0009] Figure 2 This is a schematic diagram of a planar structure of the heating plate in an embodiment of this utility model.
[0010] In the picture:
[0011] 100-Furnace body; 101-Furnace door; 102-Back plate; 103-Vacuum port; 200-Heating plate; 300-Heating pipeline; 301-Temperature sensor; 302-Pressure sensor; 303-Flow meter; 310-First branch; 320-Second branch; 330-Third branch; 400-Inlet main pipe; 500-Return main pipe; 600-Power pump; 700-Heating device; 710-Heating chamber. Detailed Implementation
[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0013] refer to Figure 1 The battery cell vacuum drying oven in this embodiment may include a furnace body 100, and a plurality of heating plates 200 are arranged inside the furnace body 100 at intervals along the height direction of the furnace body 100. There is an accommodating space between adjacent heating plates 200 so that each heating plate 200 can utilize this accommodating space to place a battery cell. After the battery cell is placed on the heating plate 200, the heating plate 200 can heat the battery cell to achieve the effect of drying the battery cell.
[0014] Please refer to the above. Figure 1 and Figure 2 Each heating plate 200 may have multiple heating pipes 300 embedded inside, and these heating pipes 300 are connected in parallel. Each heating pipe 300 includes an inlet and an outlet, allowing the heated fluid medium to enter the heating pipe 300 through the inlet and then flow from the inlet to the outlet, thus completing the circulation of the fluid medium within the heating pipe 300. When the fluid medium flows in the heating pipe 300, due to its high temperature, it can exchange heat with the heating plate 200, causing the temperature of the heating plate 200 to rise. When the battery cell is placed on the heating plate 200, the heated plate 200 can heat the battery cell, thereby completing the baking process.
[0015] In this embodiment, multiple heating pipes 300 can be arranged along a first direction, and the inlet and outlet of each heating pipe 300 are located on the same side of the heating plate 200, which facilitates the laying of the heating pipes 300. Furthermore, the inlet and outlet of each heating pipe 300 are arranged adjacent to each other, which shortens the flow path of the fluid medium in the heating pipe 300. When the fluid medium flows in the heating pipe 300, the temperature difference between the inlet and outlet is small, meaning the temperature of the fluid medium in the heating pipe 300 is relatively uniform. After heat exchange between the fluid medium and the heating plate 200, the temperature of all parts of the heating plate 200 is consistent. When the heating plate 200 is used to heat the battery cells, the drying effect of each battery cell is consistent.
[0016] It is worth noting that in this embodiment, the heating plate 200 is heated using a fluid medium. Since the boiling point of the fluid medium is fixed, its temperature will not continue to rise after it boils. Compared to resistance wire heating, the heating plate 200 in this embodiment is heated by a fluid medium, which prevents overheating and thus avoids battery short circuits.
[0017] Continue to refer to Figure 1 The cell vacuum drying furnace in this embodiment may also include an inlet manifold 400, a return manifold 500, and a heating device 700. The heating device 700 is provided with a heating chamber 710, which can be filled with a fluid medium. The heating device 700 can heat the fluid medium in the heating chamber 710 until the fluid medium reaches a preset temperature.
[0018] The inlet manifold 400 is connected to the heating chamber 710, and the return manifold 500 is also connected to the heating chamber 710. Furthermore, the inlet of each heating pipe 300 is connected to the inlet manifold 400, and the outlet is connected to the return manifold 500. A power pump 600 may also be installed on the inlet manifold 400 or the return manifold 500, so that the high-temperature fluid medium in the heating chamber can enter the inlet manifold 400 under the drive of the power pump 600, and then enter each heating pipe 300. After the fluid medium completes heat exchange with the heating plate 200 in the heating pipe 300, it enters the return manifold 500 through the outlet, and then returns to the heating chamber 710 through the return manifold 500.
[0019] As an alternative implementation, the fluid medium can be water. On the one hand, using water as the medium flowing in the heating pipe 300 can reduce costs. On the other hand, water has a boiling point of 100°C at normal pressure, which ensures that the temperature of the heating plate 200 will not exceed 100°C after heat exchange with it. Therefore, it can be ensured that the heating plate 200 will not damage the battery cell due to overheating during the heating process.
[0020] In some embodiments, continue to refer to Figure 1 The furnace body 100 may include a back plate 102 and a furnace door 101 arranged opposite each other. The furnace door 101 can be opened or closed relative to the furnace body 100 to form a closed space inside the furnace body 100, or to remove the dried battery cells from the furnace body 100. Based on this, the liquid inlet manifold 400 and the liquid return manifold 500 can be arranged on the side of the back plate 102 away from the furnace door 101; that is, the liquid inlet manifold 400 and the liquid return manifold 500 are located on the back of the furnace body 100. This arrangement of the pipes will not affect the opening and closing of the furnace door 101.
[0021] Each heating pipe 300 can be installed through the back plate 102 so that the inlet and outlet of the heating pipe 300 can be connected to the main inlet pipe 400 and the main return pipe 500, respectively. In addition, the main inlet pipe 400 and the main return pipe 500 can be installed close to the back plate 102. This not only reduces the heat loss of the fluid medium before entering the heating pipe 300, but also helps to shorten the flow path of the fluid medium between the inlet and outlet of the heating pipe 300, making it easier to reduce the temperature difference of the fluid medium at the inlet and outlet.
[0022] Furthermore, quick-connect couplings can be used to connect each heating pipe 300 to the inlet main pipe 400, and also to the return main pipe 500. These quick-connect couplings not only allow for rapid connection between the heating pipe 300 and either the inlet main pipe 400 or the return main pipe 500, but also allow for the removal and maintenance of the corresponding heating plate 200 if a problem occurs in one of the heating pipes 300, without affecting the normal operation of the other heating plates 200.
[0023] like Figure 1 As shown, the back plate 102 of the furnace body 100 may also be provided with a vacuum port 103, which may be located at the top of the back plate 102. When it is necessary to maintain a vacuum state in the furnace body 100, the vacuum port 103 can be used to evacuate the inside of the furnace body 100, thereby meeting the production requirements of the battery cells.
[0024] In some embodiments, such as Figure 2As shown, in the heating plate 200, the heating pipes 300 are laid in a roughly "U"-shaped structure. Specifically, the heating pipes 300 may include a first branch 310, a second branch 320, and a third branch 330 connected in series. The first branch 310 and the third branch 330 are arranged in parallel, and the second branch 320 connects the first branch 310 and the third branch 330. The liquid inlet may be located at the end of the first branch 310 away from the second branch 320, and the liquid outlet may be located at the end of the third branch 330 away from the second branch 320. Thus, the flow path of the fluid medium in the heating pipes 300 is sequentially: liquid inlet, first branch 310, second branch 320, third branch 330, and liquid outlet.
[0025] The first branch 310 and the third branch 330 can extend from one side of the heating plate 200 along the second direction to the other side of the heating plate 200, respectively. The second branch 320 is located near the edge of the heating plate 200, meaning that the heating pipe 300 can extend from one side of the heating plate 200 to the other side along the second direction. This arrangement increases the area of the heating pipe 300, thereby increasing the heat exchange area between the heating pipe 300 and the heating plate 200, and thus improving the heat exchange effect between the heating pipe 300 and the heating plate 200. Here, the second direction is perpendicular to the first direction, and the plane containing the first and second directions is parallel to the surface of the heating plate 200 used to place the battery cell.
[0026] Further reference Figure 2 Furthermore, multiple heating pipes 300 can extend along the first direction from one side of the heating plate 200 to the other side. That is, among the multiple heating pipes 300, the two outermost heating pipes 300 are respectively located close to the edge of the heating plate 200. This allows the multiple heating pipes 300 on the heating plate 200 to cover the entire heating plate 200. When the fluid medium in the heating pipes 300 exchanges heat with the heating plate 200, it can ensure that the temperature is uniform among all parts of the heating plate 200, thereby ensuring the drying effect of each battery cell.
[0027] In order to ensure that the heating plate 200 can reach the preset temperature, such as Figure 2 As shown, each heating pipe 300 may be equipped with a temperature sensor 301, which may be located at the inlet or outlet of the heating pipe 300 to detect the temperature of the fluid medium in the heating pipe 300. By detecting the temperature value of the fluid medium in the heating pipe 300, the temperature of the heating plate 200 can be determined, thereby confirming whether the temperature of the heating plate 200 has reached the preset temperature value, thus ensuring the drying effect of the battery cells.
[0028] The heating pipe 300 may also be equipped with a pressure sensor 302, which can be used to detect the pressure of the fluid medium in the heating pipe 300. Specifically, the pressure sensor 302 can be installed at the inlet or outlet of the heating pipe 300. After the fluid medium exchanges heat with the heating plate 200, there is still a temperature gap in the heating plate 200. By obtaining the pressure of the fluid medium in the heating pipe 300 and adjusting the power of the power pump 600 according to the actual pressure of the fluid medium, the pressure of the fluid medium in the heating pipe 300 can be increased, thereby increasing the flow velocity of the fluid medium and improving the heat exchange efficiency between the heating pipe 300 and the heating plate 200, thus making up for the temperature gap.
[0029] The heating pipe 300 may also be equipped with a flow meter 303, which can be used to detect the flow rate of the fluid medium in the heating pipe 300. Specifically, the flow meter 303 can be installed at the inlet or outlet of the heating pipe 300. When there is a temperature gap in the heating plate 200, the flow rate of the fluid medium in the heating pipe 300 can be obtained, and the power of the power pump 600 can be adjusted according to the actual flow rate of the fluid medium to increase the flow rate of the fluid medium, thereby improving the heat exchange efficiency between the heating pipe 300 and the heating plate 200, and thus making up for the temperature gap.
[0030] In practical applications, a pressure sensor 302 and a flow meter 303 can be installed on the heating pipeline 300 at the same time. Through dual monitoring, the condition of the fluid medium in the heating pipeline 300 can be obtained more accurately, thereby adjusting the efficiency of the power pump 600 more precisely, so that the fluid medium in the heating pipeline 300 can achieve rapid circulation and then quickly replenish the temperature gap.
[0031] It is worth mentioning that the pressure sensor 302 and the flow meter 303 can also be used to detect whether the fluid medium in the heating pipe 300 is in a normal flow state. When any abnormality is detected in any heating pipe 300 on the heating plate 200, the corresponding heating plate 200 can be removed for maintenance, which is efficient and convenient.
[0032] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this utility model without departing from the spirit and scope of this utility model. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A vacuum drying oven for battery cells, characterized in that, The furnace includes a furnace body, which is provided with a plurality of heating plates. The plurality of heating plates are spaced apart along the height direction of the furnace body. Each heating plate is used to place a battery cell and heat the battery cell. Each of the heating plates has multiple parallel heating pipes embedded inside. The multiple heating pipes are arranged along a first direction and extend from one side of the heating plate to the other side. A fluid medium flows inside the heating pipes, and the heating pipes heat the heating plate through the fluid medium. The heating pipeline includes an inlet and an outlet, which are located on the same side of the heating plate. The inlet and outlet of each heating pipeline are adjacent to each other. The heating pipeline includes a first branch, a second branch, and a third branch connected in series. The first branch and the third branch are arranged in parallel, and the second branch is connected between the first branch and the second branch. The inlet is located at the end of the first branch away from the second branch, and the outlet is located at the end of the third branch away from the second branch. The first branch and the third branch extend from one side of the heating plate along a second direction to the other side of the heating plate. The first direction is perpendicular to the second direction, and the plane containing the first direction and the second direction is parallel to the surface of the heating plate used to place the battery cell.
2. The cell vacuum drying oven according to claim 1, characterized in that, It also includes an inlet manifold and a return manifold, with the inlet of each heating pipe connected to the inlet manifold and the outlet of each heating pipe connected to the return manifold.
3. The cell vacuum drying oven according to claim 2, characterized in that, It also includes a heating device, which has a heating chamber inside, the heating chamber being filled with a fluid medium, and the heating device being used to heat the fluid medium inside the heating chamber; The inlet manifold and the return manifold are respectively connected to the heating chamber.
4. The cell vacuum drying oven according to claim 2, characterized in that, The furnace body includes a back panel and a furnace door arranged opposite to each other; The liquid inlet manifold and the liquid return manifold are located on the side of the back plate away from the furnace door. The heating pipe passes through the back plate so that the liquid inlet and the liquid outlet are respectively connected to the liquid inlet manifold and the liquid return manifold.
5. The cell vacuum drying oven according to claim 4, characterized in that, The top of the back plate is provided with a vacuum port.
6. The cell vacuum drying oven according to claim 2, characterized in that, The inlet of the heating pipeline is connected to the main inlet pipe via a quick-connect coupling, and / or the outlet of the heating pipeline is connected to the main return pipe via a quick-connect coupling.
7. The cell vacuum drying oven according to claim 1, characterized in that, Each of the heating pipes is equipped with a pressure sensor at its inlet or outlet, and the pressure sensor is used to detect the pressure of the fluid medium in the heating pipe.
8. The cell vacuum drying oven according to claim 1, characterized in that, Each of the heating pipelines is equipped with a flow meter at its inlet or outlet, and the flow meter is used to detect the flow rate of the fluid medium in the heating pipeline.
9. The cell vacuum drying oven according to claim 1, characterized in that, Each of the heating pipes is equipped with a temperature sensor at its inlet or outlet, and the temperature sensor is used to detect the temperature of the fluid medium in the heating pipe.