Battery piece sintering device

Abstract

The utility model provides a kind of battery piece sintering device, including heating pipe moving device and shell;Heating pipe moving device includes multiple fixed blocks distributed along the direction of battery piece transmission and chain conveying unit being set in the bottom of each fixed block;Shell includes upper cover, lower cover, front heat insulation plate and rear heat insulation plate, and the sintering cavity is surrounded between upper cover, lower cover, front heat insulation plate and rear heat insulation plate, multiple spiral heating pipes distributed along the direction of battery piece transmission are equipped in sintering cavity, and the bottom of each spiral heating pipe is connected with corresponding fixed block.The device can solve the problem of uneven sintering temperature, without occupying too much heating pipe cost, saving the sintering cost of battery piece, and increasing production efficiency.

Description

Technical Field

[0001] This utility model mainly relates to the field of sintering equipment technology, and in particular to a battery cell sintering equipment. Background Technology

[0002] Sintering is a critical step in the manufacturing process of solar cells. In existing methods, several straight heating tubes are usually arranged along the path of the solar cell to heat it. However, due to the gaps between the multiple heating tubes, uneven temperature may occur inside the sintering device. For example, the temperature in the middle of the sintering device may be higher than that on both sides, resulting in poor sintering of the solar cell. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a battery cell sintering device to solve the problem of uneven internal temperature in existing sintering devices and avoid poor sintering of battery cells.

[0004] This utility model provides a battery cell sintering device, including a heating tube moving device and a housing; the heating tube moving device includes multiple fixed blocks distributed along the battery cell transport direction and a chain conveying unit disposed at the bottom of each fixed block; the housing includes an upper cover, a lower cover, a front heat insulation plate and a rear heat insulation plate, the upper cover, the lower cover, the front heat insulation plate and the rear heat insulation plate are arranged to form a sintering cavity, the sintering cavity is provided with multiple spiral heating tubes distributed along the battery cell transport direction, and the bottom of each spiral heating tube is connected to a corresponding fixed block.

[0005] In some embodiments, the sintering cavity is cylindrical.

[0006] In some embodiments, both the front heat insulation plate and the rear heat insulation plate have an opening in the middle, with one heat insulation plate having an opening that forms a feed inlet and the other heat insulation plate having an opening that forms a discharge outlet.

[0007] In some embodiments, the top of the cover is provided with a vent.

[0008] In some embodiments, the bottom of the lower cover is provided with a limiting groove extending along the transport direction of the battery cell.

[0009] In some embodiments, the upper cover and the lower cover are fixedly connected by bolts.

[0010] In some embodiments, the chain conveying unit includes a driving sprocket, a driven sprocket, a chain, and a fixing plate;

[0011] The middle parts of both the driving sprocket and the driven sprocket are connected to the fixed plate via a crossbeam, and the driving sprocket and the driven sprocket are connected by the chain.

[0012] In some embodiments, the chain conveying unit further includes a motor, which is disposed on a crossbeam between the middle of the drive sprocket and the fixed plate to drive the drive sprocket to rotate.

[0013] In some embodiments, the cell sintering apparatus further includes a temperature sensor disposed on the side wall of the lower cover.

[0014] In some embodiments, the spiral heating tube is a resistance wire.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] This utility model provides a battery cell sintering device. By setting a spiral heating tube, the heating space is increased. The front and rear heat insulation plates can reduce heat loss. When the battery cell enters the sintering chamber, the heating tube moving device can drive the spiral heating tube to move with the battery cell, thereby solving the problem of uneven internal temperature and not occupying too much heating tube cost. Therefore, it can also save the sintering cost of battery cells and increase production efficiency. Attached Figure Description

[0017] The accompanying drawings are included to provide a further understanding of this application; they are incorporated into and constitute a part of this application. The drawings illustrate embodiments of this application and, together with this specification, serve to explain the principles of this application. In the drawings:

[0018] Figure 1 This is a front view of a battery cell sintering apparatus provided by this utility model;

[0019] Figure 2 This is an internal schematic diagram of a battery cell sintering device provided by this utility model;

[0020] Figure 3 This is a top view of a battery cell sintering apparatus provided by this utility model;

[0021] Figure 4 This is a schematic diagram of the chain conveyor unit provided by this utility model;

[0022] Figure 5 This is a schematic diagram of the temperature change curve at the center of the battery cell provided by this utility model. Detailed Implementation

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0024] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0025] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0026] Please refer to Figures 1-4 This embodiment provides a solar cell sintering apparatus, including a heating tube moving device 1 and a housing 2. The heating tube moving device 1 includes a moving device along the solar cell transport direction x (e.g., ...). Figure 1 The housing 2 comprises multiple fixed blocks 11 (in the direction indicated by the middle arrow) and a chain conveyor unit 12 disposed at the bottom of each fixed block 11. The housing 2 includes an upper cover 21, a lower cover 22, a front heat insulation plate 23, and a rear heat insulation plate 24. The upper cover 21, lower cover 22, front heat insulation plate 23, and rear heat insulation plate 24 form a sintering cavity. Please refer to... Figure 2 , Figure 3 The sintering chamber contains multiple spiral heating tubes 25 distributed along the x-direction of the solar cell transport. Please refer to [reference needed]. Figure 4 Each spiral heating tube 25 has a corresponding fixing block 11 connected to its bottom. In this embodiment, there are three spiral heating tubes 25, and the specific temperature of each of the three spiral heating tubes 25 is adjustable.

[0027] Still referencing Figure 1 Both the front heat insulation plate 23 and the rear heat insulation plate 24 have openings in their middle sections. In this embodiment, the opening in the middle of the front heat insulation plate 23 constitutes the feed inlet 261, and the opening in the middle of the rear heat insulation plate 24 constitutes the discharge outlet 262. The top of the upper cover 21 has a vent hole 211 for introducing nitrogen gas to remove oxygen. With this structure, during the sintering process, the battery cells can enter the sintering chamber through the feed inlet 261 and the discharge outlet 262, passing through the middle of each spiral heating tube 25 in the sintering chamber, thus ensuring uniform heating and preventing poor sintering. In this embodiment, the sintering chamber is cylindrical, thereby increasing heat reflection and allowing heat to concentrate on the battery cells entering the sintering chamber. The upper cover 21 and the lower cover 22 are fixedly connected by bolts to increase the sealing performance of the sintering chamber.

[0028] Still referencing Figure 3 The bottom of the lower cover 22 is provided with a limiting groove 221 extending along the cell transport direction x. Multiple fixing blocks 11 are engaged in the limiting groove 221 and are respectively connected to the bottom of multiple spiral heating tubes 25 inside the sintering chamber. It will be understood that the limiting groove 221 can be continuously arranged or arranged in multiple segments along the cell transport direction x; there is no limitation on this. This embodiment uses a three-segment limiting groove 221 design as an example for explanation. With this structure, during the sintering process, after the cell enters the sintering chamber, the multiple spiral heating tubes 25 can move along with the cell inside the sintering chamber. This maintains a constant internal temperature without requiring excessive heating tube costs, thus saving on cell sintering costs and increasing production efficiency.

[0029] Still referencing Figure 4The chain conveying unit 12 includes a driving sprocket 121, a driven sprocket 122, a chain 123, and a fixed plate 124. The middle portions of both the driving sprocket 121 and the driven sprocket 122 are connected to the fixed plate 124 via a crossbeam, and the driving sprocket 121 and the driven sprocket 122 are connected by the chain 123. In this embodiment, the chain conveying unit 12 also includes a motor 125, which is mounted on the crossbeam between the middle portion of the driving sprocket 121 and the fixed plate 124 to drive the driving sprocket 121 to rotate. With this structure, during the sintering step, after the battery cell enters the sintering chamber, the motor 125 drives the driving sprocket 121 to rotate, causing the driven sprocket 122 connected to the driving sprocket 121 to rotate accordingly. This causes the chain 123 to move the fixed block 11, which in turn moves the spiral heating tube within the sintering chamber. In this embodiment, due to the adoption of the above-mentioned three-segment limiting groove 221 design, each chain conveying unit 12 will have a certain movement limit distance. Taking the chain conveying unit 12 closest to the feed port 261 as an example, when the fixed block 11 connected to it drives the corresponding spiral heating tube 25 to follow the battery cell to the movement limit distance, the motor 125 in the chain conveying unit 12 will drive the fixed block back to the position closest to the feed port 261. Subsequently, the remaining chain conveying units 12 distributed along the battery cell transmission direction x will repeat the above steps to follow the battery cell to continue moving, thereby ensuring that the heating temperature field of the battery cell will not change too much, that is, keeping the temperature of the battery cell constant.

[0030] In some embodiments, the cell sintering apparatus further includes a temperature sensor (not shown in the figure), which can be disposed on the side wall of the lower cover 22 to monitor the temperature changes inside the sintering chamber in real time. For example, when the temperature is low at a certain point, the corresponding chain conveyor unit 12 can be used to drive the spiral heating tube 25 to heat it. In some embodiments, the spiral heating tube 25 is a resistance wire to reduce sintering costs.

[0031] Please refer to Figure 5 The diagram shows a schematic of the temperature change curve at the center of the solar cell in this embodiment. Figure 5The horizontal axis represents the sintering time of the solar cell (in seconds), and the vertical axis represents the temperature at the center of the solar cell (in degrees Celsius). Specifically, the curve segment with a time interval of approximately [1-13] indicates that the solar cell has just entered the feed inlet 261; the curve segment with a time interval of approximately [13-115] indicates that the solar cell is sintered following the first chain conveyor unit 12; the curve segment with a time interval of approximately [130-240] indicates that the solar cell is sintered continuing following the second chain conveyor unit 12; and the curve segment with a time interval of approximately [247-313] indicates that the solar cell is sintered continuing following the third chain conveyor unit 12. As can be seen from the above curve segments, after the solar cell enters the feed inlet 261, the corresponding sintering processes performed by the first, second, and third chain conveyor units 12 all achieve the requirement of maintaining a constant temperature at the center of the solar cell. Therefore, this solves the problem of uneven internal temperature in existing sintering devices and avoids poor sintering of the solar cells.

[0032] The basic concepts have been described above. Obviously, for those skilled in the art, the above disclosure of the utility model is merely an example and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore, such modifications, improvements, and corrections still fall within the spirit and scope of the exemplary embodiments of this application.

[0033] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0034] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of scope in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0035] Although this application has been described with reference to specific embodiments, those skilled in the art should recognize that the above embodiments are only used to illustrate this application, and various equivalent changes or substitutions can be made without departing from the spirit of this application. Therefore, any changes or modifications to the above embodiments within the essential spirit of this application will fall within the scope of the claims of this application.

Claims

1. A solar cell sintering apparatus, characterized in that, Includes a heating element moving device and a housing; The heating tube moving device includes multiple fixed blocks distributed along the battery cell transmission direction and a chain conveying unit disposed at the bottom of each fixed block; The housing includes an upper cover, a lower cover, a front heat insulation plate, and a rear heat insulation plate. The upper cover, the lower cover, the front heat insulation plate, and the rear heat insulation plate are arranged to form a sintering cavity. The sintering cavity is provided with a plurality of spiral heating tubes distributed along the transport direction of the battery cells. The bottom of each spiral heating tube is connected to a corresponding fixing block.

2. The battery cell sintering apparatus as described in claim 1, characterized in that, The sintering cavity is cylindrical.

3. The battery cell sintering apparatus as described in claim 1, characterized in that, Both the front and rear heat insulation plates have openings in the middle, with one opening forming a feed inlet and the other forming a discharge outlet.

4. The battery cell sintering apparatus as described in claim 1, characterized in that, The top of the cover is provided with a vent.

5. The battery cell sintering apparatus as described in claim 1, characterized in that, The bottom of the lower cover is provided with a limiting groove extending along the transport direction of the battery cell.

6. The solar cell sintering apparatus as described in claim 1, characterized in that, The upper cover and the lower cover are fixedly connected by bolts.

7. The solar cell sintering apparatus according to any one of claims 1-6, characterized in that, The chain transmission unit includes a driving sprocket, a driven sprocket, a chain, and a fixed plate; The middle parts of both the driving sprocket and the driven sprocket are connected to the fixed plate via a crossbeam, and the driving sprocket and the driven sprocket are connected by the chain.

8. The battery cell sintering apparatus as described in claim 7, characterized in that, The chain conveying unit also includes a motor, which is mounted on a crossbeam between the middle of the drive sprocket and the fixed plate to drive the drive sprocket to rotate.

9. The solar cell sintering apparatus as described in claim 1, characterized in that, The cell sintering apparatus also includes a temperature sensor, which is disposed on the side wall of the lower cover.

10. The solar cell sintering apparatus as described in claim 1, characterized in that, The spiral heating tube is a resistance wire.

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