Tank solution circulation structure for battery piece production

Abstract

The utility model discloses a groove body solution circulation structure for battery piece production, which comprises a groove body and a hot water tank, and the bottom of the groove body is provided with a liquid outlet and a liquid inlet; the top of the hot water tank is open, and the top end of the hot water tank clings to the bottom of the tank body; a conduit is coiled in the hot water tank, one end of the conduit penetrates out of the hot water tank to be communicated with the liquid outlet, and the other end of the conduit is communicated with the liquid inlet; a water inlet is formed in the side wall of the hot water tank, and a water outlet is formed in the bottom of the hot water tank. The circulating structure can adjust the temperature of the solution in the tank body.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell manufacturing, and more specifically to a tank solution circulation structure for producing solar cells. Background Art

[0002] In the existing manufacturing process of polycrystalline silicon solar cells, the texturing process is a key step, which uses acidic corrosive liquid to form a honeycomb texture structure on the surface of the silicon wafer, thereby improving the photoelectric conversion efficiency of the solar cell.

[0003] The quality of texturing is directly related to the performance of the battery cell, among which the temperature of the acidic etching solution plays a key role in the texturing effect. In industrial production, the reaction rate of acid etching texturing gradually increases with the increase of the solution temperature. The way in which temperature affects the reaction rate is mainly to change the activation energy of the reactants in the solution and the transmission properties of the solution. The viscosity and diffusion rate of the solution are related to the temperature. The viscosity and density of the liquid decrease with the increase of temperature. At the same time, the transmission rate of the substance will increase with the increase of temperature. Therefore, the fluidity of the solution is better when the temperature is high than when the temperature is low. Therefore, when the temperature is high, it will increase the rate at which the silicon wafer product leaves the silicon wafer surface, thereby increasing the reaction rate of the silicon wafer. In the current texturing process, the initial temperature of the solution in the texturing tank is between 35℃-36℃. However, the reaction effect is best when the solution temperature is maintained at 38℃-40℃. The existing texturing tank is large, and the temperature of the solution in the texturing tank is not easy to adjust and maintain within the optimal temperature range.

[0004] Therefore, it is an urgent problem for those skilled in the art to develop a tank solution circulation structure for producing battery cells that can adjust the temperature of the solution in the texturing tank. Utility Model Content

[0005] In view of this, the utility model provides a tank solution circulation structure for battery cell production, which can adjust the temperature of the solution in the texturing tank.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A cell solution circulation structure for producing battery cells, comprising:

[0008] A tank body, wherein a liquid outlet and a liquid inlet are arranged at the bottom of the tank body;

[0009] A hot water tank, wherein the top of the hot water tank is open, and the top of the hot water tank is in close contact with the bottom of the tank body; a conduit is coiled inside the hot water tank, one end of the conduit passes through the hot water tank and is connected to the liquid outlet, and the other end is connected to the liquid inlet; the interior of the hot water tank is filled with hot water, and a water inlet is provided on the side wall of the hot water tank, and a water outlet is provided at the bottom.

[0010] The beneficial effect of adopting the above technical solution is that the solution in the tank body of the utility model can be heated by the hot water in the hot water tank through the circulation of the conduit. At the same time, the hot water in the hot water tank contacts the bottom of the tank body and can also heat the solution in the tank body, thereby realizing the regulation of the temperature of the solution in the tank body.

[0011] Preferably, a first temperature sensor is disposed on the inner wall of the tank body, and the first temperature sensor can detect the temperature of the solution in the tank body.

[0012] Preferably, the conduit outside the hot water tank is connected to a filter, which can filter the solution in the tank while circulating the solution.

[0013] Preferably, a valve is provided at the connection between the conduit and the liquid outlet, and the valve can control the circulation process of the solution.

[0014] Preferably, a circulation pump is provided at a position of the conduit between the filter and the hot water tank, and the circulation pump provides power for the circulation of the solution in the conduit.

[0015] Preferably, a first flange extends outward from the top edge of the hot water tank, a second flange is fixed to the bottom of the tank body, the first flange and the second flange are buckled and fixed with bolts. The arrangement of the first flange and the second flange can make the hot water tank firmly fixed to the tank body and closely attached to the tank body, and the hot water in the hot water tank heats the solution in the tank body.

[0016] Preferably, a sealing gasket is provided at the connection between the first flange and the second flange, which can seal the connection between the hot water tank and the tank body.

[0017] Preferably, one end of the conduit passing through the liquid inlet is connected to a multi-way pipe joint, the multi-way pipe joint is placed in the tank body, and the water outlet direction of the multi-way pipe joint is parallel to the bottom surface of the tank body. The multi-way pipe joint can make the solution flow in all directions, which can improve the uniformity of the solution temperature.

[0018] Preferably, a heat-insulating layer is provided outside the hot water tank.

[0019] Preferably, a second temperature sensor is provided on the side wall of the hot water tank. The second temperature sensor can detect the water temperature in the hot water tank, and when the water temperature is low, the water in the hot water tank can be replaced.

[0020] It can be seen from the above technical solutions that, compared with the prior art, the utility model discloses a tank solution circulation structure for battery cell production, which has the following beneficial effects:

[0021] (1) In the utility model, the hot water tank is attached to the bottom surface of the tank body, and the solution in the tank body can be heated. At the same time, the solution can also circulate in the conduit, thereby adjusting the temperature of the solution in the tank body;

[0022] (2) The hot water tank and the tank body are connected by a first flange and a second flange, which facilitates the disassembly and assembly of the hot water tank;

[0023] (3) The hot water in the hot water tank comes from the hot water supplied in the workshop, which can reduce the cost of regulating the solution temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0025] Figure 1 The accompanying drawing is a schematic diagram of the structure of the circulation structure provided by the utility model;

[0026] Figure 2 The accompanying drawing is a side view of the circulation structure provided by the utility model;

[0027] Figure 3 The accompanying drawing is an internal cross-sectional view of the circulation structure provided by the utility model;

[0028] Figure 4 The accompanying drawings are provided by the utility model Figure 3 Cross-sectional view at AA in the middle.

[0029] Among them, in the figure,

[0030] 1-tank body;

[0031] 11-liquid outlet; 12-liquid inlet; 13-second flange;

[0032] 2-Hot water tank;

[0033] 21-water inlet; 22-water outlet; 23-first flange;

[0034] 3-catheter; 4-first temperature sensor; 5-filter; 6-valve; 7-circulation pump; 8-sealing gasket; 9-multi-way pipe joint; 10-second temperature sensor. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] The utility model embodiment discloses a tank solution circulation structure for producing battery cells, comprising:

[0037] A tank body 1, the bottom of which is provided with a liquid outlet 11 and a liquid inlet 12;

[0038] The hot water tank 2 has an open top, and the top of the hot water tank 2 is in close contact with the bottom of the tank body 1; a conduit 3 is coiled inside the hot water tank 2, one end of the conduit 3 passes through the hot water tank 2 and is connected to the liquid outlet 11, and the other end is connected to the liquid inlet 12; the inside of the hot water tank 2 is filled with hot water, and the side wall of the hot water tank 2 is provided with a water inlet 21, and the bottom is provided with a water outlet 22. The conduit 3 is spirally coiled on the bottom surface of the hot water tank 2, which prolongs the time that the solution stays in the hot water tank 2, and the solution in the conduit 3 can be heated.

[0039] In order to further optimize the above technical solution, a stirring device may be added in the tank body 1 to make the temperature of the solution in the tank body 1 more uniform.

[0040] In order to further optimize the above technical solution, a first temperature sensor 4 is provided on the inner wall of the tank body 1. According to the temperature change of the first sensor 4, the valve 6 is opened or closed to realize the control of the circulating heating of the solution.

[0041] In order to further optimize the above technical solution, the conduit 3 located outside the hot water tank 2 is connected to a filter 5 .

[0042] In order to further optimize the above technical solution, a valve 6 is provided at the connection between the conduit 3 and the liquid outlet 11 .

[0043] In order to further optimize the above technical solution, a circulation pump 7 is provided at a position of the conduit 3 between the filter 5 and the hot water tank 2 .

[0044] In order to further optimize the above technical solution, a first flange 23 extends outward from the top edge of the hot water tank 2, a second flange 13 is fixed to the bottom of the tank body 1, and the first flange 23 and the second flange 13 are buckled and fixed with bolts.

[0045] In order to further optimize the above technical solution, a support seat may be provided at the bottom of the hot water tank 2, and the hot water tank 2 and the tank body 1 may be fixed more firmly by connecting the support seat and the flange.

[0046] In order to further optimize the above technical solution, a sealing gasket 8 is provided at the connection between the first flange 23 and the second flange 13 .

[0047] In order to further optimize the above technical solution, one end of the conduit 3 passing through the liquid inlet 12 is connected to a multi-way pipe joint 9, which is placed in the tank body 1, and the water outlet direction of the multi-way pipe joint 9 is parallel to the bottom surface of the tank body 1. The multi-way pipe joint 9 can be a three-way, four-way or five-way pipe joint.

[0048] In order to further optimize the above technical solution, a heat preservation layer is arranged outside the hot water tank 2. The heat preservation layer can keep the hot water in the hot water tank 2 warm.

[0049] In order to further optimize the above technical solution, a second temperature sensor 10 is provided at the side wall of the hot water tank 2. The second sensor 10 can measure the water temperature in the hot water tank 2, and then determine whether the water in the hot water tank 2 needs to be replaced according to the water temperature.

[0050] Tank solution circulation process:

[0051] When the solution is introduced into the tank 1, the temperature is between 35°C and 36°C, and the temperature of the hot water introduced into the hot water tank 2 is between 75°C and 85°C. When the temperature of the solution in the tank 1 is between 38°C and 40°C, the reaction effect is the best.

[0052] In the initial state, valve 6 is closed, and the temperature of the solution in the tank body 1 is slightly different from the optimal temperature. The solution in the tank body can be slowly heated up only by the hot water in the hot water tank 2 contacting the tank body 1. When it is detected that the water temperature in the hot water tank 2 is lower than 70°C, the heating by the hot water contacting the tank body 1 is not ideal. Then, valve 6 is opened to circulate the solution in the tank body 1 to heat it up. When it is detected that the temperature of the solution in the tank body 1 is higher than 38°C, valve 6 is closed to stop the circulation of the solution. The solution is slowly heated up only by the direct contact of hot water. If it is detected that the water temperature in the hot water tank 2 is lower than 50°C, the hot water in the hot water tank 2 needs to be replaced.

[0053] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0054] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cell solution circulation structure for producing battery cells, characterized in that: include: A tank body (1), wherein a liquid outlet (11) and a liquid inlet (12) are provided at the bottom of the tank body (1); A hot water tank (2), wherein the top of the hot water tank (2) is open, and the top of the hot water tank (2) is in close contact with the bottom of the tank body (1); a conduit (3) is coiled inside the hot water tank (2), one end of the conduit (3) passes through the hot water tank (2) and is connected to the liquid outlet (11), and the other end is connected to the liquid inlet (12); the interior of the hot water tank (2) is filled with hot water, and a water inlet (21) is provided on the side wall of the hot water tank (2), and a water outlet (22) is provided at the bottom.

2. The cell solution circulation structure for producing a battery cell according to claim 1, characterized in that: A first temperature sensor (4) is arranged on the inner wall of the tank body (1).

3. The cell solution circulation structure for producing a battery cell according to claim 2, characterized in that: The conduit (3) located outside the hot water tank (2) is connected to a filter (5).

4. The cell solution circulation structure for producing a battery cell according to claim 3, characterized in that: A valve (6) is provided at the connection between the conduit (3) and the liquid outlet (11).

5. The cell solution circulation structure for producing battery cells according to claim 4, characterized in that: The conduit (3) is provided with a circulation pump (7) at a position between the filter (5) and the hot water tank (2).

6. The cell solution circulation structure for producing a battery cell according to claim 1, characterized in that: A first flange (23) extends outward from the top edge of the hot water tank (2), and a second flange (13) is fixed to the bottom of the tank body (1). The first flange (23) and the second flange (13) are buckled together and fixed with bolts.

7. The cell solution circulation structure for producing battery cells according to claim 6, characterized in that: A sealing gasket (8) is provided at the connection between the first flange (23) and the second flange (13).

8. The cell solution circulation structure for producing battery cells according to claim 1, characterized in that: One end of the conduit (3) passing through the liquid inlet (12) is connected to a multi-way pipe joint (9), the multi-way pipe joint (9) is placed in the tank body (1), and the water outlet direction of the multi-way pipe joint (9) is parallel to the bottom surface of the tank body (1).

9. The cell solution circulation structure for producing battery cells according to claim 8, characterized in that: A heat-insulating layer is arranged outside the hot water tank (2).

10. The cell solution circulation structure for producing battery cells according to claim 1, characterized in that: A second temperature sensor (10) is arranged on the side wall of the hot water tank (2).

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