Electrolyte infrared heating device and electrolyte injection system
The electrolyte infrared heating device, which uses a heating assembly consisting of a heat-conducting plate and an infrared lamp, solves the problem of poor electrolyte flow during transportation, improves the wetting effect and transportation efficiency of the inner electrode plates and diaphragm of the battery cell, and achieves uniform heating and precise temperature control.
Patent Information
- Application Number
- CN202520045353.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-08
AI Technical Summary
The electrolyte is affected by the external ambient temperature during transportation, resulting in poor fluidity and poor wetting effect on the inner electrode plates and separator of the battery cell.
An electrolyte infrared heating device is used, which uses a heating assembly consisting of a heat-conducting plate and an infrared lamp to heat the infusion tube. Heat energy is transferred through infrared radiation to ensure that the electrolyte is maintained at a preset temperature, thereby improving fluidity and wetting effect.
It improves the electrolyte delivery efficiency and the wetting effect on the inner electrode and diaphragm of the battery cell, avoids possible corrosion or contamination from liquid medium heat transfer, and enhances heating uniformity and temperature control accuracy.
Smart Images
Figure CN223858413U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery manufacturing technology, and in particular to an electrolyte infrared heating device and an electrolyte injection system. Background Technology
[0002] In the manufacturing process of secondary batteries, especially lithium-ion and sodium-ion batteries, wetting is a crucial step in cell manufacturing. The wetting effect directly determines the performance of the cell. When the wetting effect of the electrolyte is poor, white streaks will appear on the separator inside the cell, and the electrodes that are not in contact with the electrolyte cannot participate in the electrochemical reaction, resulting in problems such as black spots and lithium plating, thereby reducing the electrochemical performance of the battery.
[0003] In current battery production processes, electrolytes are typically stored in storage tanks at the same temperature as the ambient environment. During the filling stage, the electrolyte in the storage tanks is transported through pipelines to the filling machine. The electrolyte temperature is significantly affected by the ambient temperature; when the ambient temperature is low, the electrolyte transport efficiency is low, resulting in poor wetting of the inner electrodes and separator of the battery cell after filling. Existing technologies also utilize heat transfer oil to heat the electrolyte, but heat transfer oil contains many impurities, which can easily pollute the workshop environment. Summary of the Invention
[0004] To address the shortcomings or deficiencies mentioned in the background art, this application provides an electrolyte infrared heating device and an electrolyte injection system, which can solve the problem that the electrolyte has poor fluidity and poor wetting effect on the electrodes and diaphragms inside the battery cell due to the influence of external ambient temperature during transportation.
[0005] In a first aspect, embodiments of this application provide an electrolyte infrared heating device, comprising:
[0006] An infusion tube, one end of which is connected to an injection machine and the other end of which is connected to a storage tank, the storage tank being used to store electrolyte, the infusion tube being used to deliver electrolyte, and the injection machine being used to inject electrolyte into the battery cell;
[0007] A heating assembly, comprising a heat-conducting plate and an infrared lamp, wherein the infusion tube is at least partially embedded in the heat-conducting plate, and the infrared lamp is used to heat the infusion tube and / or the heat-conducting plate.
[0008] In some embodiments, the system further includes an insulated housing, the heating assembly being disposed within the insulated housing, and the two ends of the infusion tube being connected to pipe fittings located outside the insulated housing.
[0009] In the first aspect, in some embodiments, the heat insulation box comprises an inner box and an outer box, the inner box is arranged in the outer box, and a vacuum heat insulation layer is arranged between the inner box and the outer box.
[0010] In the first aspect, in some embodiments, a heat preservation pad is arranged on the side surface of the heat conduction plate away from the infrared lamp.
[0011] In the first aspect, in some embodiments, the infusion tube is bent in an S shape in two directions perpendicular to each other, and the planes in which the two directions are located are parallel to the heat conduction plate.
[0012] In the first aspect, in some embodiments, the number of infusion tubes is multiple, and the multiple infusion tubes are distributed equidistantly on the heat conduction plate.
[0013] In the first aspect, in some embodiments, the infusion tube is made of a plastic hose, and a black coating for absorbing infrared light is arranged on the outer surface of the infusion tube.
[0014] In the first aspect, in some embodiments, the number of infrared lamps is multiple, and the multiple infrared lamps are arranged equidistantly along the extension direction of the infusion tube.
[0015] In the first aspect, in some embodiments, a temperature sensor embedded in the heat conduction plate is further included, and the temperature sensor is used to detect the temperature of the electrolyte in the infusion tube.
[0016] In the second aspect, the application provides an electrolyte injection system, comprising:
[0017] The electrolyte injection machine and the electrolyte storage tank are connected by the electrolyte infrared heating device.
[0018] The technical scheme provided by the application has the following beneficial effects:
[0019] The application provides an electrolyte infrared heating device and an electrolyte injection system, which comprise an infusion tube, one end of the infusion tube is used to communicate with an electrolyte injection machine, the other end of the infusion tube is used to communicate with an electrolyte storage tank, the electrolyte storage tank is used to store electrolyte, the infusion tube is used to transport electrolyte, the electrolyte injection machine is used to inject electrolyte into an electric core, a heating assembly, the heating assembly comprises a heat conduction plate and an infrared lamp, the infusion tube is at least partially embedded in the heat conduction plate, and the infrared lamp is used to heat the infusion tube and / or the heat conduction plate.
[0020] The heating assembly is provided with the heat-conducting plate and the infrared lamp, the infusion tube is embedded on the heat-conducting plate, the infrared lamp can emit infrared rays to irradiate the heat-conducting plate and the infusion tube, heat energy is transmitted to the heat-conducting plate and the infusion tube through infrared radiation, the electrolyte in the infusion tube can be heated, the electrolyte can be maintained at a preset temperature, the electrolyte has good fluidity, the electrolyte conveying efficiency is improved, and the electrolyte infiltration effect on the pole piece and the diaphragm in the battery cell is improved. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0022] Figure 1 A cross-sectional view of the heat-conducting plate provided in the embodiments of the present application is shown.
[0023] Figure 2 A structural schematic view of the infusion tube provided in the embodiments of the present application is shown.
[0024] Figure 3 A distribution schematic view of the infrared lamp provided in the embodiments of the present application is shown.
[0025] In the drawings, the components represented by each reference numeral are listed as follows:
[0026] 1, infusion tube; 2, heating assembly; 21, heat-conducting plate; 22, infrared lamp; 3, heat-insulating box; 31, inner box; 32, outer box; 33, vacuum heat-insulating layer; 4, pipe joint; 5, heat-insulating pad; 6, temperature sensor. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0028] In view of the deficiencies of the above background art or one of the deficiencies, the electrolyte infrared heating device and the liquid injection system provided in the embodiments of the present application can solve the problems that the electrolyte is affected by the external environment temperature during conveying, has poor fluidity, and has poor infiltration effect on the pole piece and the diaphragm in the battery cell.
[0029] Referring to Figures 1 to 3As shown, the first aspect of the embodiment of the present application provides an electrolyte infrared heating device, comprising:
[0030] The infusion pipe 1 is used for communicating with the liquid injection machine at one end and communicating with the liquid storage tank at the other end. The liquid storage tank is used for storing electrolyte. The infusion pipe 1 is used for conveying electrolyte. The liquid injection machine is used for injecting electrolyte into the battery cell.
[0031] The heating assembly 2 comprises a heat-conducting plate 21 and an infrared lamp 22. The infusion pipe 1 is at least partially embedded on the heat-conducting plate 21. The infrared lamp 22 is used for heating the infusion pipe 1 and / or the heat-conducting plate 21.
[0032] The heating assembly 2 of the electrolyte infrared heating device of the embodiment of the present application is provided with the heat-conducting plate 21 and the infrared lamp 22. The infusion pipe 1 is embedded and installed on the heat-conducting plate 21. The infrared lamp 22 can emit infrared rays to irradiate the heat-conducting plate 21 and the infusion pipe 1. Heat energy is transmitted to the heat-conducting plate 21 and the infusion pipe 1 through infrared radiation, so as to heat the electrolyte in the infusion pipe 1. The temperature of the electrolyte in the infusion pipe 1 is maintained at a preset temperature. The electrolyte has good fluidity. The conveying efficiency of the electrolyte is improved. At the same time, the infiltration effect of the electrolyte on the pole piece and the diaphragm in the battery cell is improved.
[0033] The electrolyte infrared heating device of the embodiment of the present application can heat the liquid without direct contact. The corrosion or pollution of the heating element that may exist in the heat transfer of the liquid medium is avoided. The heat-conducting plate 21 facilitates the embedded installation of the infusion pipe 1. The heat-conducting plate 21 can also uniformly transmit the heat energy transmitted by the infrared lamp 22 to the infusion pipe 1. The utilization rate of energy is improved. The heating efficiency and the heating uniformity of the electrolyte in the infusion pipe 1 are improved.
[0034] For example, the heat-conducting plate 21 is provided with a groove. The groove facilitates the embedded installation of the infusion pipe 1. The infusion pipe 1 can be fixed in the groove by self-clamping or adding fasteners. The infusion pipe 1 can be prevented from falling off. The infrared lamp 22 can emit infrared rays to directly irradiate the heat-conducting plate 21 and the infusion pipe 1. The temperature of the infusion pipe 1 rises, so as to heat the flowing electrolyte in the infusion pipe 1.
[0035] It should be noted that the heat-conducting plate 21 in the present application is heated by the infrared light emitted by the infrared lamp 22 and is transmitted to the infusion pipe 1 by contact. Therefore, it can be understood that other heat-conducting plates 21 that can realize such a function can be used in the present application. The size, shape and material of the heat-conducting plate 21 can be adaptively adjusted by the person skilled in the art according to the use scene and test conditions.
[0036] In addition, the infusion tube 1 can be installed in a manner of being entirely embedded in the heat conduction plate 21 or being partially exposed from the heat conduction plate 21. When the infusion tube 1 is entirely embedded in the heat conduction plate 21, the infrared lamp 22 heats the heat conduction plate 21 through infrared light irradiation, and then heats the electrolyte in the infusion tube 1 through the heat conduction plate 21; when the infusion tube 1 is partially exposed from the heat conduction plate 21, the infrared lamp 22 simultaneously heats the heat conduction plate 21 and the infusion tube 1 through infrared light irradiation, so as to heat the electrolyte in the infusion tube 1.
[0037] In some optional embodiments, referring to Figures 1 to 3 The electrolyte infrared heating device provided by the embodiment of the present application also includes a heat insulation box 3, the heating assembly 2 is arranged in the heat insulation box 3, and the two ends of the infusion tube 1 are respectively communicated with the pipe joints 4 located outside the heat insulation box 3.
[0038] The heating assembly 2 of the embodiment of the present application is installed in the heat insulation box 3, the heat insulation box 3 is a closed structure, heat loss can be reduced, and the heating efficiency of the electrolyte is indirectly improved. Meanwhile, in order to facilitate the connection of the infusion tube 1 conveying the electrolyte with a liquid storage tank and a liquid injection machine, the outer surface of the heat insulation box 3 is provided with the pipe joints 4 communicated with the end portions of the infusion tube 1.
[0039] In some optional embodiments, referring to Figures 1 to 3 The electrolyte infrared heating device provided by the embodiment of the present application includes a heat insulation box 3, the heat insulation box 3 includes an inner box 31 and an outer box 32, the inner box 31 is arranged in the outer box 32, and a vacuum heat insulation layer 33 is arranged between the inner box 31 and the outer box 32.
[0040] The heat insulation box 3 of the embodiment of the present application includes the inner box 31 and the outer box 32, the inner box 31 is installed in the outer box 32, the heating assembly 2 is installed in the inner box 31, the vacuum heat insulation layer 33 is formed between the inner box 31 and the outer box 32 by being vacuumized, the vacuum heat insulation layer 33 can play a role of heat insulation and heat preservation, and heat loss of the inner box 31 to the outer box 32 is effectively prevented. For example, the heat insulation material can be fixed between the inner box 31 and the outer box 32 to support the inner box 31 and the outer box 32, so that a space is formed between the inner box 31 and the outer box 32, and the vacuum heat insulation layer 33 is formed by being vacuumized.
[0041] In the first aspect, in some optional embodiments, referring to Figures 1 to 3 The electrolyte infrared heating device provided by the embodiment of the present application includes a heat conduction plate 21, and a heat insulation pad 5 is attached to the side surface of the heat conduction plate 21 away from the infrared lamp 22.
[0042] The heat conduction plate 21 of the embodiment of the present application is fixedly connected with a heat preservation pad 5 away from the side of the infrared lamp 22, and the heat preservation pad 5 can isolate heat loss. For example, the heat preservation pad 5 can be made of polyurethane, glass fiber, XPE, etc., which can effectively block the loss of heat and achieve good heat preservation effect.
[0043] In the first aspect, in some optional embodiments, referring to Figures 1 to 3 The electrolyte infrared heating device provided by the embodiment of the present application is shown in the figure. The infusion tube 1 of the electrolyte infrared heating device is S-shaped and is bent in two directions perpendicular to each other, and the planes in which the two directions are located are parallel to the heat conduction plate 21.
[0044] The infusion tube 1 of the embodiment of the present application is continuously and circuitously bent on the heat conduction plate 21, and the bending directions are two directions perpendicular to each other, which are the length and width directions of the heat conduction plate 21. The flow path of the electrolyte and the contact area between the infusion tube 1 and the heat conduction plate 21 are increased, and the heat exchange efficiency can be improved.
[0045] In some optional embodiments, referring to Figures 1 to 3 The electrolyte infrared heating device provided by the embodiment of the present application is shown in the figure. The electrolyte infrared heating device has a plurality of infusion tubes 1, and the plurality of infusion tubes 1 are distributed at equal intervals on the heat conduction plate 21.
[0046] The electrolyte infrared heating device provided by the embodiment of the present application is shown in the figure. The electrolyte infrared heating device has a plurality of infusion tubes 1, and the plurality of infusion tubes 1 are distributed at equal intervals on the heat conduction plate 21.
[0047] In some optional embodiments, referring to Figures 1 to 3 The electrolyte infrared heating device provided by the embodiment of the present application is shown in the figure. The infusion tube 1 of the electrolyte infrared heating device is made of a plastic hose, and the outer surface of the infusion tube 1 is provided with a black coating for absorbing infrared light.
[0048] The electrolyte infrared heating device provided by the embodiment of the present application is shown in the figure. The infusion tube 1 of the electrolyte infrared heating device is made of a plastic hose, and the outer surface of the infusion tube 1 is provided with a black coating for absorbing infrared light.
[0049] In some optional embodiments, referring to Figures 1 to 3 The electrolyte infrared heating device provided by the embodiment of the present application is shown in the figure. The electrolyte infrared heating device has a plurality of infrared lamps 22, and the plurality of infrared lamps 22 are arranged at equal intervals along the extension direction of the infusion tube 1.
[0050] The number of the infrared lamps 22 in the embodiment of the present application is multiple, the multiple infrared lamps 22 are equidistantly arranged along the extension direction of the infusion pipe 1, the power of the infrared lamp 22 located in the inlet area of the infusion pipe 1 is the largest, and the power of the infrared lamp 22 gradually decreases towards the outlet direction of the infusion pipe 1, so that the zoned heating of the infusion pipe 1 can be realized, the energy utilization rate can be improved, and the temperature uniformity can be enhanced, and the independent power adjustment of each heating zone can also ensure that the liquid temperature is always uniformly close to the target value.
[0051] For example, the number of the infrared lamps 22 in the embodiment is three and is fixedly installed in the heat insulation box 3. The infusion pipe 1 is respectively communicated with a liquid storage tank and a liquid injection machine at two ends, and the electrolyte enters the infusion pipe 1 after leaving the liquid storage tank. By adjusting the heating power of the infrared lamp 22, gradient heating is realized. The infrared lamp 22 located near the inlet area of the infusion pipe 1 is provided with the highest heating power, and the heating power of the other infrared lamps 22 gradually decreases along the outlet area of the infusion pipe 1. The temperature of the electrolyte is usually about 20℃ when leaving the liquid storage tank, and needs to be increased to about 45℃ when passing through the infusion pipe 1.
[0052] It should be noted that when heating the flowing liquid, if a single heat source is used for concentrated heating, the non-uniform liquid flow rate can cause the outlet temperature to be too high or the inlet temperature to be too low. The zoned heating combined with the curved pipeline can improve the energy utilization rate and enhance the temperature uniformity. The heating power of each heating zone is independently adjusted to ensure that the liquid temperature is always uniformly close to the target value. The target value is to increase the temperature of the electrolyte to the interval of 40℃ to 50℃ before leaving the device. When the electrolyte is at 40℃ to 50℃, the relative viscosity is reduced, the flowability is stronger, and the infiltration speed in the battery cell is faster, thereby the high-temperature standing time required for complete infiltration of the battery cell after liquid injection can be shortened.
[0053] In some optional embodiments, referring to Figures 1 to 3 It should be noted that, in the embodiment of the present application, the electrolyte infrared heating device further comprises a temperature sensor 6 embedded in the heat conduction plate 21, and the temperature sensor 6 is used for detecting the temperature of the electrolyte in the infusion pipe 1.
[0054] The temperature sensor 6 in the embodiment of the present application is embedded in the heat conduction plate 21 and in contact with the outer surface of the infusion pipe 1. The number of the temperature sensor 6 is three, which are respectively arranged at the inlet and outlet of the infusion pipe 1, and at the middle position between the inlet and the outlet.
[0055] It should be noted that, Figures 1 to 3This is merely an exemplary description of a temperature sensor 6 being installed on one of the infusion tubes 1. In other possible implementations, one or more temperature sensors 6 may be installed on each infusion tube 1, or only on some of the infusion tubes 1, such as installing a temperature sensor 6 every other infusion tube 1. In addition, the number of temperature sensors 6 installed on each infusion tube 1 is not limited to 3, and this application does not impose any specific limitations on this.
[0056] Meanwhile, to avoid the infrared lamp 22 directly irradiating the temperature sensor 6, the temperature sensor 6 is positioned close to the side where the insulation pad 5 is located. This allows for monitoring of the electrolyte temperature in three areas: the inlet, the middle, and the outlet. By adjusting the heating power of the infrared lamp 22 at each location, localized overheating can be avoided, and the heating effect of the electrolyte can be ensured.
[0057] That is, the electrolyte infrared heating device of this application optimizes the heating efficiency of the electrolyte and improves the heating uniformity by setting up a heat-conducting plate 21 and an infrared lamp 22, in conjunction with the specific structural design of the infusion pipe 1, and has higher precision and stability in energy efficiency and temperature control.
[0058] See Figure 2 Figures 1 to 3 As shown, a second aspect of this application provides a liquid injection system, comprising:
[0059] An electrolyte injection machine and a storage tank are connected together, with an electrolyte infrared heating device according to any of the above embodiments connected between the injection machine and the storage tank.
[0060] The electrolyte injection system of this application uses the electrolyte infrared heating device of any of the above embodiments to heat the electrolyte, which can maintain the electrolyte temperature at a preset temperature, ensure that the electrolyte has good fluidity, improve the electrolyte delivery efficiency, and improve the electrolyte wetting effect on the inner electrode and separator of the battery cell, thereby improving the production quality and efficiency of the production line.
[0061] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.
[0062] It has to be noted that, in the present application, the terms "first", "second", etc. are used only to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.
[0063] The foregoing is considered as illustrative only of the principles of the application. Numerous modifications and changes will readily occur to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Accordingly, the scope of the application is intended to be defined only as set forth in the claims.
Claims
1. An electrolyte infrared heating device, characterized by, The electrolyte infrared heating device comprises: a liquid delivery pipe (1), one end of which is used for communication with a liquid injection machine, and the other end of which is used for communication with a liquid storage tank, the liquid storage tank being used for storing electrolyte, and the liquid delivery pipe (1) being used for delivering electrolyte, and the liquid injection machine being used for injecting electrolyte into an electric core; a heating assembly (2), which comprises a heat-conducting plate (21) and an infrared lamp (22), and the liquid delivery pipe (1) is at least partially embedded in the heat-conducting plate (21), and the infrared lamp (22) is used for heating the liquid delivery pipe (1) and / or the heat-conducting plate (21).
2. The electrolyte infrared heating device according to claim 1, further comprising: a heat-insulating box (3), wherein the heating assembly (2) is arranged in the heat-insulating box (3), and the two ends of the liquid delivery pipe (1) are respectively communicated with pipe joints (4) located outside the heat-insulating box (3).
3. The electrolyte infrared heating device according to claim 2, wherein: the heat-insulating box (3) comprises an inner box (31) and an outer box (32), the inner box (31) is arranged in the outer box (32), and a vacuum heat-insulating layer (33) is arranged between the inner box (31) and the outer box (32).
4. The electrolyte infrared heating device according to claim 1, wherein: a heat-insulating pad (5) is arranged on the surface of the heat-conducting plate (21) away from the infrared lamp (22).
5. The electrolyte infrared heating device according to claim 1, wherein: the liquid delivery pipe (1) is S-shaped and is bent in two directions perpendicular to each other, and the planes of the two directions are parallel to the heat-conducting plate (21).
6. The electrolyte infrared heating device according to claim 1, wherein: the number of the liquid delivery pipes (1) is multiple, and the multiple liquid delivery pipes (1) are equidistantly distributed on the heat-conducting plate (21).
7. The electrolyte infrared heating device according to claim 1, wherein: the liquid delivery pipe (1) is made of a plastic hose, and a black coating for absorbing infrared light is arranged on the outer surface of the liquid delivery pipe (1).
8. The electrolyte infrared heating device according to claim 1, wherein: the number of the infrared lamps (22) is multiple, and the multiple infrared lamps (22) are equidistantly arranged along the extension direction of the liquid delivery pipe (1).
9. The electrolyte infrared heating device according to claim 1, further comprising: a temperature sensor (6) embedded in the heat-conducting plate (21), and the temperature sensor (6) is used for detecting the temperature of electrolyte in the liquid delivery pipe (1).
10. A liquid injection system characterized by comprising: The electrolyte infrared heating device according to any one of claims 1 to 9 is connected between a liquid injection machine and a liquid storage tank.