Sodium ion battery pole piece sodium supplementing device

Abstract

The utility model relates to the technical field of sodium ion battery production, and discloses a sodium ion battery pole piece sodium supplementing device which comprises an unwinding device for transporting a battery pole piece, a winding device, a plurality of transmission rollers and a chemical sodium supplementing device, the chemical sodium supplementing device comprises a spraying device for spraying sodium liquid on the battery pole piece and a sodium source heating device for providing the sodium liquid for the spraying device. According to the sodium supplementing device for the sodium ion battery pole piece, the sodium supplementing consistency of the pole piece is improved, the sodium supplementing operation is simplified, the energy density of a sodium ion battery is improved, the performance of a product is improved, and meanwhile, the effect of saving cost can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sodium ion battery production technical field, concretely relates to a sodium ion battery pole piece sodium supplement device. BACKGROUND

[0002] At present, lithium resources are limited in global reserves, and the price fluctuates greatly. Compared with lithium ion batteries, sodium ion batteries have abundant reserves and low cost, and have broad application prospects. However, similar to lithium ion batteries, in the first charge and discharge process, the sodium ions released from the positive electrode will react at the negative electrode to form an SEI film, thereby consuming part of the active sodium ions and causing the battery to have a low first coulomb efficiency.

[0003] In order to solve the above problems, sodium supplement technology enters people's field of vision. Through the sodium supplement technology, the active sodium loss in the first week of charge and discharge can be pre-compensated. The sodium supplement method includes positive electrode sodium supplement and negative electrode sodium supplement. The positive electrode sodium supplement is to add a small amount of sodium-rich base transition metal oxide as an additive to the positive electrode material for sodium supplement. The negative electrode sodium supplement includes chemical sodium supplement and electrochemical sodium supplement. At present, there are methods of heating and melting sodium liquid under vacuum conditions to make lithium atoms freely evaporate and deposit on the pole piece, or dissolving metal sodium in an organic solvent, then spraying or dripping the sodium-containing organic solution on the surface of the negative electrode piece, so that the sodium ions in the organic sodium solution are reduced to metal sodium and embedded in the negative electrode piece, completing the sodium supplement of the sodium ion battery.

[0004] However, the above-mentioned technology still has some problems in actual production application, such as high requirement for equipment, high safety risk, high difficulty in batch production, and high cost. At present, there is no mature and operable device to perform chemical pre-sodium treatment on the sodium ion battery pole piece. Therefore, it is urgent to design and develop a sodium supplement device to meet the needs of actual production and life. UTILITY MODEL CONTENTS

[0005] The utility model aims at the deficiencies of the above-mentioned technology, and provides a sodium ion battery pole piece sodium supplement device to improve the sodium supplement consistency of the pole piece, simplify the sodium supplement operation, improve the energy density of the sodium ion battery, improve the performance of the product, and save the cost.

[0006] To achieve the above-mentioned purpose, the sodium ion battery pole piece sodium supplement device designed by the utility model comprises an unwinding device, a winding device and a plurality of transmission rollers for transporting the battery pole piece, and further comprises a chemical sodium supplement device. The chemical sodium supplement device comprises a spraying device for spraying sodium liquid on the battery pole piece, and a sodium source heating device for providing sodium liquid for the spraying device.

[0007] Preferably, the spraying device comprises a spraying chamber for the transportation of the battery pole piece through the transmission roller, a plurality of spraying heads are arranged in the spraying chamber, and the spraying heads are arranged to spray sodium liquid towards the battery pole piece.

[0008] Preferably, the spraying head sprays sodium liquid to the front and back of the battery pole piece respectively.

[0009] Preferably, the spraying head is provided with a plurality of spray holes with different diameters.

[0010] Preferably, the spray holes with the same diameter are distributed in a ring shape on the spraying head, and the diameters of the spray holes decrease from the inside to the outside, and the spray holes with different diameters can be selectively opened and closed to accurately control the sodium supplement amount.

[0011] Preferably, the bottom of the sodium source heating device is provided with an electric heating wire for heating and melting the metallic sodium into sodium liquid.

[0012] Preferably, a sodium liquid transportation pipeline for transporting sodium liquid is arranged between the sodium source heating device and the spraying device.

[0013] Preferably, the bottom of the spraying chamber is provided with a sodium metal recovery device for recovering redundant sodium metal of the spraying head, and the redundant sodium metal not sprayed on the battery pole piece during the spraying process is recovered.

[0014] Preferably, the middle of the sodium metal recovery device is provided with a recovery channel connected with the sodium source heating device, and the redundant sodium metal recovered by the sodium metal recovery device is heated again and returned to the sodium source heating device through the recovery channel, thereby reducing the waste of sodium metal and saving cost.

[0015] Preferably, the spraying device and the sodium source heating device are both communicated with an inert gas storage device through a gas transportation pipeline to provide an inert gas environment.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1. Efficient continuous sodium supplement can be realized.

[0018] 2. The sodium supplement amount on the surface of the battery pole piece can be accurately controlled by controlling the size and opening and closing of the spray hole of the spraying head.

[0019] 3. The sodium metal recovery device can heat and melt the redundant sodium metal during the spraying process and recover the redundant sodium metal, thereby saving cost.

[0020] 4. The sodium supplement consistency of the pole piece is improved, the sodium supplement operation is simplified, the energy density of the sodium ion battery is improved, the performance of the product is improved, and the cost can be saved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 FIG. 1 is a structural schematic view of a sodium ion battery pole piece sodium supplement device according to the present application;

[0022] Figure 2The utility model discloses a spraying head's structural diagram of sodium ion battery pole piece sodium supplement device.

[0023] Mark explanation:

[0024] 1-battery pole piece, 2-unwinding device, 3-winding device, 4-transport roller, 5-chemical sodium supplement device, 6-spraying device, 7-sodium source heating device, 8-spraying chamber, 9-spraying head, 10-spraying hole, 11-sodium liquid transportation pipeline, 12-sodium metal recovery device, 13-gas transportation pipeline, 14-inert gas storage device. Specific embodiments

[0025] The technical scheme of the utility model will be described below in conjunction with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, not all embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of the utility model protection.

[0026] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. The indicated device or element must have a particular orientation, a particular orientation and operation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between two elements. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] Example 1

[0029] As Figure 1 shown, a sodium ion battery pole piece sodium supplement device, comprising unwinding device 2, winding device 3 and a plurality of transport rollers 4 for transporting battery pole piece 1, further comprising chemical sodium supplement device 5, and the chemical sodium supplement device 5 comprises spraying device 6 for spraying sodium liquid on the battery pole piece 1 and sodium source heating device 7 for providing sodium liquid for the spraying device 6.

[0030] In use, the sodium source heating device 7 melts the metal sodium to obtain sodium liquid, and then the sodium liquid reaches the spraying device 6 and is sprayed on the surface of the sodium ion battery pole piece 1.

[0031] Embodiment 2

[0032] As shown in Figure 1 , a sodium ion battery pole piece sodium supplementing device includes an unwinding device 2 for transporting the battery pole piece 1, a winding device 3, and a plurality of transmission rollers 4, and further includes a chemical sodium supplementing device 5, which includes a spraying device 6 for spraying sodium liquid on the battery pole piece 1 and a sodium source heating device 7 for providing the spraying device 6 with sodium liquid.

[0033] In this embodiment, the spraying device 6 includes a spraying chamber 8 for transporting the battery pole piece 1 through the transmission rollers 4, and a plurality of spraying heads 9 are arranged in the spraying chamber 8, and the spraying heads 9 spray sodium liquid towards the battery pole piece 1.

[0034] In use, the sodium source heating device 7 melts the metal sodium to obtain sodium liquid, and then the sodium liquid reaches the spraying device 6 and is sprayed on the surface of the sodium ion battery pole piece 1.

[0035] Embodiment 3

[0036] As shown in Figure 1 , a sodium ion battery pole piece sodium supplementing device includes an unwinding device 2 for transporting the battery pole piece 1, a winding device 3, and a plurality of transmission rollers 4, and further includes a chemical sodium supplementing device 5, which includes a spraying device 6 for spraying sodium liquid on the battery pole piece 1 and a sodium source heating device 7 for providing the spraying device 6 with sodium liquid.

[0037] In this embodiment, the spraying device 6 includes a spraying chamber 8 for transporting the battery pole piece 1 through the transmission rollers 4, and a plurality of spraying heads 9 are arranged in the spraying chamber 8, and the spraying heads 9 spray sodium liquid towards the battery pole piece 1.

[0038] Specifically, as shown in Figure 1 , the spraying heads 9 are distributed on both sides of the battery pole piece 1 and spray sodium liquid towards the front and back surfaces of the battery pole piece 1, respectively.

[0039] In use, the sodium source heating device 7 melts the metal sodium to obtain sodium liquid, and then the sodium liquid reaches the spraying device 6 and is sprayed on the surface of the sodium ion battery pole piece 1 through the spraying heads 9.

[0040] Embodiment 4

[0041] As shown in Figure 1As shown in the figure, a sodium ion battery pole piece sodium supplement device includes a unwinding device 2 for transporting the battery pole piece 1, a winding device 3, and a plurality of transmission rollers 4, and further includes a chemical sodium supplement device 5, which includes a spraying device 6 for spraying sodium liquid on the battery pole piece 1 and a sodium source heating device 7 for providing the spraying device 6 with sodium liquid.

[0042] In this embodiment, the spraying device 6 includes a spraying chamber 8 for the transportation of the battery pole piece 1 through the transmission roller 4, and a plurality of spraying heads 9 are arranged in the spraying chamber 8, and the spraying heads 9 are arranged to spray sodium liquid towards the battery pole piece 1.

[0043] Specifically, as shown in the figure, the spraying heads 9 are distributed on both sides of the battery pole piece 1 and spray sodium liquid towards the front and back of the battery pole piece 1, respectively. Figure 1

[0044] Among them, as shown in the figure, a plurality of spraying holes 10 with different diameters are arranged on the spraying head 9, and the spraying holes 10 with the same diameter are arranged in a ring shape on the spraying head 9, and the diameters of the spraying holes 10 gradually decrease from the inside to the outside, and in this embodiment, the diameters are 0.7mm, 0.4mm, and 0.3mm. Figure 2

[0045] In use, the sodium source heating device 7 melts the metal sodium to obtain sodium liquid, and then the sodium liquid reaches the spraying device 6 and is sprayed on the surface of the sodium ion battery pole piece through the spraying head 9.

[0046] Embodiment 5

[0047] As shown in the figure, a sodium ion battery pole piece sodium supplement device includes a unwinding device 2 for transporting the battery pole piece 1, a winding device 3, and a plurality of transmission rollers 4, and further includes a chemical sodium supplement device 5, which includes a spraying device 6 for spraying sodium liquid on the battery pole piece 1 and a sodium source heating device 7 for providing the spraying device 6 with sodium liquid. Figure 1 In this embodiment, the spraying device 6 includes a spraying chamber 8 for the transportation of the battery pole piece 1 through the transmission roller 4, and a plurality of spraying heads 9 are arranged in the spraying chamber 8, and the spraying heads 9 are arranged to spray sodium liquid towards the battery pole piece 1.

[0048] Specifically, as shown in the figure, the spraying heads 9 are distributed on both sides of the battery pole piece 1 and spray sodium liquid towards the front and back of the battery pole piece 1, respectively.

[0049] Figure 1 Among them, as shown in the figure, a plurality of spraying holes 10 with different diameters are arranged on the spraying head 9, and the spraying holes 10 with the same diameter are arranged in a ring shape on the spraying head 9, and the diameters of the spraying holes 10 gradually decrease from the inside to the outside, and in this embodiment, the diameters are 1.0mm, 0.6mm, and 0.5mm.

[0050] Figure 2

[0051] ​​​​​In this embodiment, the sodium source heating device 7 is provided at the bottom with an electric heating wire for heating and melting the metallic sodium into sodium liquid, and the heating temperature is 110-140 degrees Celsius. In this embodiment, the heating temperature is 110 degrees Celsius. The sodium source heating device 7 is provided between the spraying device 6 with a sodium liquid conveying pipeline 11 for conveying the sodium liquid.

[0052] In use, the sodium source heating device 7 heats and melts the metallic sodium into sodium liquid through the electric heating wire, and then the sodium liquid reaches the spraying device 6 through the sodium liquid conveying pipeline 11, and is sprayed on the surface of the sodium ion battery electrode sheet through the spraying head 9.

[0053] Embodiment 6

[0054] As shown in Figure 1 , a sodium ion battery electrode sheet sodium supplementing device includes an unwinding device 2 for conveying the battery electrode sheet 1, a winding device 3, and a plurality of conveying rollers 4. The device also includes a chemical sodium supplementing device 5, which includes a spraying device 6 for spraying the sodium liquid on the battery electrode sheet 1, and a sodium source heating device 7 for providing the sodium liquid for the spraying device 6.

[0055] In this embodiment, the spraying device 6 includes a spraying chamber 8 for conveying the battery electrode sheet 1 through the conveying rollers 4. The spraying chamber 8 is provided with a plurality of spraying heads 9, which are directed towards the battery electrode sheet 1 for spraying the sodium liquid.

[0056] Specifically, as shown in Figure 1 , the spraying heads 9 are distributed on both sides of the battery electrode sheet 1, and are directed towards the front and back surfaces of the battery electrode sheet 1 for spraying the sodium liquid.

[0057] As shown in Figure 2 , the spraying head 9 is provided with a plurality of spray holes 10 of different diameters. The spray holes 10 of the same diameter are annularly distributed on the spraying head 9. From the inside to the outside, the diameters of the spray holes 10 gradually decrease. In this embodiment, the diameters are 0.8 mm, 0.5 mm, and 0.4 mm.

[0058] In this embodiment, the sodium source heating device 7 is provided at the bottom with an electric heating wire for heating and melting the metallic sodium into sodium liquid, and the heating temperature is 110-140 degrees Celsius. In this embodiment, the heating temperature is 140 degrees Celsius. In other embodiments, the heating temperature can also be 115 degrees Celsius. The sodium source heating device 7 is provided between the spraying device 6 with a sodium liquid conveying pipeline 11 for conveying the sodium liquid.

[0059] In this embodiment, the bottom of the spraying chamber 8 is provided with a sodium metal recovery device 12 for recovering the redundant sodium metal of the spraying head 9. The sodium metal recovery device 12 is provided at the bottom with a heating wire, and at the middle with a recovery channel, which is connected to the sodium source heating device 7.

[0060] In use, the sodium source heating device 7 melts the sodium metal by heating the sodium metal through the heating wire to obtain sodium liquid, and then the sodium liquid reaches the spraying device 6 through the sodium liquid conveying pipeline 11 and is sprayed on the surface of the sodium ion battery pole piece through the spraying head 9, while the sodium metal recovery device 12 melts the redundant sodium metal of the spraying head 9 again and then injects the sodium metal into the sodium source heating device 7 through the recovery pipeline, so as to reduce the waste of sodium metal and save the cost.

[0061] In the above embodiment, the spraying device 6 and the sodium source heating device 7 can also be communicated with the inert gas storage device 14 through the gas conveying pipeline 13 to provide an inert gas environment, and the inert gas storage device 14 is filled with any one or two kinds of inert gas selected from helium, neon, argon and nitrogen.

[0062] In the above embodiment, the winding speed of the winding device 3 is 4.5 m / s.

[0063] The sodium ion battery pole piece sodium supplement device can realize efficient continuous sodium supplement, can accurately control the sodium supplement amount on the surface of the battery pole piece 1 by controlling the aperture size and opening and closing of the spraying hole 10 of the spraying head 9, can melt and recover the redundant sodium metal in the spraying process through the sodium metal recovery device 12, can save the cost, can improve the sodium supplement consistency of the pole piece, can simplify the sodium supplement operation, can improve the energy density of the sodium ion battery, can improve the performance of the product, and can save the cost.

[0064] Here, it should be noted that the description of the above technical solutions is exemplary, and the present specification can be embodied in different forms, and should not be interpreted as being limited to the technical solutions described herein. On the contrary, providing these descriptions will make the present disclosure complete and complete, and will fully convey the scope disclosed in the present specification to those skilled in the art. In addition, the technical solutions of the present application are limited by the scope of the claims.

[0065] The shapes, sizes, ratios, angles and numbers used to describe the aspects disclosed in the specification and claims are merely examples, and therefore the specification and claims are not limited to the shown details. In the following description, when it is determined that a detailed description of a related known function or configuration is unnecessary to obscure the focus of the specification and claims, the detailed description will be omitted.

[0066] In the case of using "including", "having" and "containing" described in the present specification, unless otherwise used, another part or other parts can also be present, and the term used can be singular but can also represent plural.

[0067] It should be noted that although the terms "first", "second", "top", "bottom", "one side", "the other side", "one end", "the other end" and the like can appear and be used in the present description to describe various different components, these components and parts should not be limited by these terms. These terms are only used to distinguish one component and part from another component and part. For example, without departing from the scope of the present description, a first part can be referred to as a second part, and similarly, a second part can be referred to as a first part, and the top and bottom parts can be reversed or converted to each other in certain cases; the parts of one end and the other end can be the same or different from each other.

[0068] When describing positional relationships, for example, when the positional order is described as "on", "above", "below" and "next", unless the words or terms such as "just" or "directly" are used, in addition, it can include the case of no contact or contact between them. If the first element is mentioned to be located "on" the second element, it does not mean that the first element must be located above the second element in the figure. The upper and lower parts of the components will change according to the change of the angle of observation and orientation. Therefore, in the drawings or in the actual structure, if the case where the first element is located "on" the second element is involved, it can include the case where the first element is located "below" the second element and the case where the first element is located "above" the second element. When describing the time relationship, unless "just" or "directly" is used, when "after", "subsequent", "subsequently" and "before" are described, the case of not continuous between steps can be included. The features of various embodiments of the present application can be partially or entirely combined or spliced with each other, and can be executed in various different configurations as can be fully understood by those skilled in the art. Embodiments of the present application can be executed independently of each other, or can be executed together in a mutually dependent relationship.

[0069] Finally, it should be noted that the above embodiments are only representative examples of the present application. Obviously, the present application is not limited to the above embodiments, but can have many variations. Any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments shall be considered to fall within the protection scope of the present application.

Claims

1. A sodium-ion battery electrode replenishment device, comprising an unwinding device (2), a winding device (3), and a plurality of transfer rollers (4) for transporting battery electrodes (1), characterized in that: It also includes a chemical sodium replenishment device (5), which includes a spraying device (6) for spraying sodium solution onto the battery electrode (1) and a sodium source heating device (7) for providing sodium solution to the spraying device (6).

2. The sodium replenishment device for sodium-ion battery electrodes as described in claim 1, characterized in that: The spraying device (6) includes a spraying chamber (8) for transporting the battery electrode (1) by a transfer roller (4). The spraying chamber (8) is provided with a plurality of spraying heads (9), which spray sodium solution onto the battery electrode (1).

3. The sodium replenishment device for sodium-ion battery electrodes as described in claim 2, characterized in that: The spray head (9) sprays sodium liquid onto the front and back sides of the battery electrode (1), respectively.

4. The sodium replenishment device for sodium-ion battery electrodes as described in claim 2, characterized in that: The spray head (9) is provided with several spray holes (10) of different diameters.

5. The sodium replenishment device for sodium-ion battery electrodes as described in claim 4, characterized in that: The nozzles (10) of the same diameter are distributed in a ring on the spray head (9), and the diameter of the nozzles (10) decreases from the inside to the outside.

6. The sodium replenishment device for sodium-ion battery electrodes as described in claim 1, characterized in that: The sodium source heating device (7) is equipped with a heating wire at the bottom to heat and melt metallic sodium into sodium liquid.

7. The sodium replenishment device for sodium-ion battery electrodes as described in claim 1, characterized in that: A sodium liquid transport pipe (11) for transporting sodium liquid is provided between the sodium source heating device (7) and the spraying device (6).

8. The sodium replenishment device for sodium-ion battery electrodes as described in claim 2, characterized in that: The bottom of the spraying chamber (8) is provided with a sodium metal recovery device (12) for recovering the excess sodium metal from the spraying head (9).

9. The sodium replenishment device for sodium-ion battery electrodes as described in claim 8, characterized in that: The sodium metal recovery device (12) has a recovery channel in the middle, which is connected to the sodium source heating device (7).

10. The sodium replenishment device for sodium-ion battery electrodes as described in claim 2, characterized in that: The spraying device (6) and the sodium source heating device (7) are both connected to the inert gas storage device (14) through the gas transport pipeline (13).

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