Battery piece material box

Abstract

The utility model discloses a battery piece material box, and belongs to the technical field of solar battery production. The material box comprises a material box body, at least one buffering piece and a fixing piece. The material box body is provided with a containing groove with a slope bottom plate, and the battery pieces slide to the low point to be stacked regularly by means of gravity. The buffering piece is installed on the fence vertical plate through the fixing piece and partially extends into the containing groove. When the carrying manipulator releases the battery piece to freely fall, the buffering piece can apply flexible buffering to the battery piece, and the impact kinetic energy generated when the battery piece impacts the groove bottom is remarkably reduced. According to the utility model, the problems of fragments and back bonding pad falling caused by rigid collision in the falling process of the ultrathin battery piece are effectively solved, the production yield and the operation reliability of an automation line are improved, the structure is simple, and the transformation is convenient.

Description

Technical Field

[0001] This application belongs to the field of battery cell cassette structure design technology, and in particular relates to a battery cell cassette. Background Technology

[0002] During the production of solar cells, specially designed boxes with sloping bottoms are typically used for collection and stacking. This design relies on the cells' own gravity to slide to the lowest point at the bottom of the storage slot, thus achieving automatic alignment and facilitating subsequent automated cell retrieval and packaging. For example, prior art patents CN223789014U disclose a highly compatible cell sorting and selection box, and patent CN223527145U discloses a cell box, which includes a base plate and four surrounding barriers. The base plate and the surrounding barriers together form a storage slot for storing the cell stacks. The base plate is an sloping support surface to support the stacked cells and allows the cells to slide to the same side for alignment.

[0003] However, as the industry moves towards higher efficiency and lower costs, the thickness of solar cells continues to decrease (e.g., from 180μm to 130μm or even thinner), significantly increasing their brittleness. In existing processes, after a robotic arm picks up the solar cells and releases them from the vacuum, the cells fall into the container in free fall. Their ends or corners first experience a rigid impact with the highest point at the bottom of the container's storage slot. This instantaneous impact can easily cause ultra-thin solar cells to shatter, resulting in direct economic losses. Especially for BC (back contact) type solar cells with pads on the entire back of the grid, the impact vibration can also cause the precision pads to detach, severely affecting the electrical connection reliability of subsequent stringing processes, becoming a technical bottleneck restricting production line yield and automation efficiency.

[0004] Therefore, there is an urgent need for a battery box solution that can provide effective cushioning during the falling of battery cells, reduce their impact kinetic energy, and thus reduce the risk of damage to fragments and solder pads. Utility Model Content

[0005] The main purpose of this application is to provide a battery cell material box. By adding a buffer to the baffle plate of the battery cell material box, the technical problem that ultra-thin battery cells are easily broken or have their solder pads detached due to rigid impact when falling and being collected is effectively solved.

[0006] This application achieves the above-mentioned objective through the following technical solution: a battery cell cassette, comprising a cassette body and a buffer member; the cassette body has a storage groove formed around it; one end of the buffer member is fixed to the cassette body and the other end extends into the storage groove; the bottom of the storage groove is a sloping structure with a highest point and a lowest point, and the buffer member is disposed above the highest point of the storage groove or above a vertex adjacent to the highest point.

[0007] Preferably, the material box body includes a base plate and a surrounding upright plate, the base plate and the surrounding upright plate together forming the storage groove.

[0008] Preferably, the buffer includes at least one buffer strip.

[0009] Preferably, the number of buffer strips is 2 to 100.

[0010] Preferably, the buffer strip is made of brush bristles.

[0011] Preferably, the buffer strip is made of anti-static bristles.

[0012] Preferably, the buffer is fixed to the material box body by a fastener; the fastener is an adhesive tape with bonding function.

[0013] Preferably, multiple buffer components are provided and arranged around the periphery of the storage slot.

[0014] Preferably, the buffer is fixedly disposed on the fence upright plate extending along a first direction, and / or disposed on the fence upright plate extending along a second direction, wherein the first direction is perpendicular to the second direction.

[0015] Preferably, the number of buffer strips is multiple, and the multiple buffer strips are arranged in any of the following ways: close together, spaced apart, horizontally arranged, vertically arranged, or in a multi-row, multi-column array.

[0016] Compared with existing technologies, the beneficial effect of the battery cell cassette provided in this application is that by adding a buffer to the baffle plate of the battery cell cassette, the technical problem of ultra-thin battery cells easily breaking or having their solder pads detached due to rigid impact during collection is effectively solved. Specifically:

[0017] (1) The buffer component applies a buffering force during the free fall of the battery cell, which greatly reduces the kinetic energy when it hits the bottom of the tank (especially the high point area), and prevents the breakage caused by impact overload from the source.

[0018] (2) For structures such as BC battery cells with fine solder pads on the back, the flexible buffer strip effectively reduces impact vibration, greatly reduces the risk of solder pad detachment, and ensures the reliability of subsequent welding processes. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of an embodiment of this application;

[0020] Figure 2 This is a top view of an embodiment of the present application.

[0021] Figure 3This is a partially enlarged structural diagram of the buffer component being fixed to the fence upright by the fastener in an embodiment of this application;

[0022] Figure 4 This is a schematic diagram of the structure with two buffers in an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the structure with four buffers in an embodiment of this application;

[0024] The numbers in the diagram represent:

[0025] 100-Battery Cell Material Box;

[0026] 200-cell battery;

[0027] 1-Material box body, 11-Base plate, 12-Enclosure upright plate, 13-Storage slot;

[0028] 2-Buffer element, 21-Buffer strip;

[0029] 3-Factors. Detailed Implementation

[0030] Example 1:

[0031] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0032] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0033] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0034] This application provides a battery cell cassette 100. Figure 1 This is a schematic diagram of the structure of a battery cell cassette in some embodiments. For example... Figure 1 As shown, the battery cell cassette 100 includes a cassette body 1 and a buffer member 2. The cassette body 1 includes a base plate 11 and a retaining upright plate 12, which together form a storage slot 13 for holding the battery cells 200.

[0035] In this embodiment, the base plate 11 and the fence upright plate 12 are an integral structure. In other embodiments, the base plate 11 and the fence upright plate 12 can also be two independent structures connected together, and the connection method is not limited.

[0036] Figure 2 This is a top view schematic diagram of the structure of the battery cell cassette in some embodiments. For example... Figure 2 As shown, viewed from above, the cell storage box 100 has a rectangular storage slot 13 with four vertices A, B, C, and D at its bottom. To ensure the cells stacked neatly within the storage slot 13, the industry standard generally employs a sloping design for the bottom of the storage slot 13; that is, the upper surface of the base plate 11 is sloping. Specifically, among the four vertices of the storage slot 13, one vertex has the lowest height (referred to as the low point) and the other vertex has the highest height (referred to as the high point), and the high point and low point are on the same diagonal. For example, point A is the high point, and point C is the low point.

[0037] Continue to refer to Figure 2 Through the sloping structure design of the bottom of the storage slot 13, when the battery cell 200 is placed in the storage slot 13 of the material box, the battery cell 200 will slide towards the lowest point (e.g., point C) of the bottom of the storage slot 13 under the action of gravity, so that the battery cell 200 is neatly stacked at the corner where the lowest point of the bottom surface is located; the two side baffles 12 forming this corner respectively contact the two adjacent sides of each battery cell, thereby tidying up each battery cell and further improving the neatness of the battery cells. Since the battery cells are neatly stacked in the material box, it is beneficial for the subsequent packaging of the battery cells, and a robotic arm can also be used to remove the battery cells from the material box, improving the automation level and production efficiency of the production line.

[0038] When collecting battery cells, a robotic arm picks up the cells and moves them to a predetermined height above the cassette. Then, a vacuum is broken to release the cells, which fall into the cassette under their own weight. However, as the cells become thinner, they also become more fragile. When a cell falls freely into the receiving slot 13, one end of the cell will first contact the highest point of the slot's bottom (e.g., point A). Because the cell is thin and brittle, it is prone to breakage upon contact with this point due to an impact exceeding its capacity. Furthermore, for BC cells, where all grid lines are located on the back side, the pads on the grid lines on the back side are easily dislodged when the BC cell falls into the receiving slot 13 and contacts the highest point. This dislodging prevents effective electrical connection during subsequent stringing.

[0039] Continue to refer to Figure 2 The battery cell cassette 100 includes a first direction X and a second direction Y. Both the first direction X and the second direction Y are perpendicular to the height direction of the battery cell cassette 100. For example, the first direction X is the length direction of the battery cell cassette, and the second direction Y is the width direction of the battery cell cassette.

[0040] Therefore, in order to solve the above-mentioned technical problems, a buffer element 2 is added to the material box in this embodiment. Figure 3 This is a partially enlarged view of the structure of the material box where the buffer is located in some embodiments. For example... Figure 3 As shown, one end of the buffer 2 is fixed to the material box body 1 by the fixing member 3, and the other end extends into the storage groove 13. Specifically, the buffer 2 is fixed to the enclosure plate 12 of the material box body 1, and fixed to the top of the enclosure plate 12. The buffer 2 is mainly used to apply a buffering force to the battery cell 200 during the process of the battery cell 200 being released and falling into the storage groove 13, reducing the descent kinetic energy of the battery cell 200 when it falls to the bottom of the storage groove 13, thereby reducing the risk of the battery cell 200 breaking and the risk of the back pad of the battery cell 200 falling off.

[0041] In some other embodiments, the buffer 2 is secured by the fastener 3 to the height range of the enclosure panel 12, excluding the top.

[0042] To effectively cushion the battery cell 200, the buffer member 2 is preferably positioned above the highest point of the receiving groove 13. Since the bottom of the receiving groove 13 is an inclined slope, the battery cell's descent in the sloping bottom of the container is not a simple vertical drop, but a complex "impact-slide" motion. The core function of the buffer member 2 is to intervene and cushion the battery cell at the moment of its first and most intense impact with the bottom of the receiving groove 13. Therefore, the effectiveness of the cushioning directly depends on whether the buffer member can catch and cushion the battery cell at the most critical moment and in the most effective position. In this embodiment, the battery cell 200 will first contact the highest point A of the bottom of the receiving groove 13; therefore, positioning the buffer member 2 near the highest point A allows for the most effective cushioning of the battery cell.

[0043] In other embodiments, the buffer 2 can also be positioned near or above vertex D, vertex C, or vertex B of the receiving slot 13. Comparatively, the effect of placing the buffer 2 above the four vertices of the receiving slot 13 is as follows: Vertex A > Vertex D > Vertex B > Vertex C. A detailed analysis of the buffering effect of the buffer 2 when installed near each vertex is as follows:

[0044] (1) Vertex A (highest point): Point A is the highest point of the slope. When the battery cell 200 falls freely, the corner or side closest to point A will be the first to collide with the area of ​​point A at a higher vertical speed. This is the "first contact" with the highest speed, the most violent collision and the most concentrated energy in the entire falling process. It is usually a point contact (corner) or short side contact. Stress concentration is very likely to cause corner breakage, microcracks or detachment of the backplate pad of the BC battery cell. Setting up a buffer 2 here is like setting up a guardrail on the edge of a cliff. It can directly intervene at the peak of the impact and transform the sharp rigid impact into a gradual contact with the flexible bristles, absorbing or dispersing most of the impact kinetic energy. At this time, the marginal benefit of the buffer is the highest, so the effect is the most significant.

[0045] (2) Vertex D (Second Highest Point): Point D and point A are both located on the "high-end side" of the material box, but point D is lower in height than point A. When the solar cell falls, it may not directly and vertically impact point D, but two situations may occur: a) The solar cell does not fall completely horizontally and tilts, scraping the side against the barrier in the area of ​​point D; b) After impacting the area of ​​point A, the solar cell rotates and bounces, and a second collision may occur in the area of ​​point D. In most cases, the collision posture between the solar cell and vertex D is a side scrape or a secondary impact, and the impact force is less than the first impact on point A. The buffer here mainly plays the role of "preventing secondary damage" and "correcting deviation". It can gently catch the bouncing or misaligned solar cell and guide it to slide down smoothly, preventing the fragile side from rigidly colliding with the hard barrier and causing the cell to crack. The effect is important, but not as critical as preventing the first impact on point A.

[0046] (3) Vertex B (Second Lowest Point): Point B is located on the "lower end" of the slope, but higher than the lowest point C. After the impact / buffering at point A (or point D), the solar cell has lost most of its vertical kinetic energy and mainly slides along the slope towards point C under the influence of gravity. When the solar cell reaches the area of ​​point B, it is closer to a state of "sliding along the slope," and may have very slight contact with point B or no contact at all. Even if there is contact, it is mainly a "slide-in" with a low speed and a small angle. The buffer is set here mainly as an "insurance strategy" to deal with extremely rare abnormal bounces or deviations from the sliding trajectory. Under most normal circumstances, its buffering effect is not obvious, so its effect ranks third.

[0047] (4) Vertex C (Lowest Point): Point C is the final convergence point and resting point of all sliding solar cells. According to the design, the solar cells will neatly stack at the corner of point C under the influence of gravity. The solar cells "arrive" or "touch" point C with a near-zero vertical velocity, resulting in more static stacking pressure than dynamic impact. Setting a buffer at point C has almost no effect on cushioning the falling impact. Its function might be to prevent minor friction between the bottom layer of solar cells and the bottom corner of the material box during stacking, or to prevent hard contact between the robotic arm and the material box during cell retrieval. In terms of its core function of "cushioning falling impact," the effect is minimal.

[0048] In this embodiment, the buffer 2 is disposed on the enclosure upright plate 12 extending along the first direction X. In some other embodiments, the buffer 2 may also be disposed on the enclosure upright plate 12 extending along the second direction Y.

[0049] In this embodiment, one buffer 2 is provided. In some other embodiments, multiple buffers 2 may also be provided. For example, Figure 4 As shown, there are two buffers 2, one near vertex A and the other near vertex D. Figure 5 As shown, there are four buffers 2, which are located near vertices A, B, C, and D respectively.

[0050] Continue to refer to Figure 3 The buffer element 2 includes at least one buffer strip 21. The number of buffer strips 21 can be from 1 to 100. On the one hand, it must provide sufficient cushioning force for the falling of the battery cell 200; on the other hand, the buffer element 2 must not interfere with the normal falling of the battery cell 200, ensuring that the battery cell 200 can fall normally into the storage slot 13 for stacking and storage. The number of buffer strips 21 cannot be too few, as too few will not provide effective cushioning, while too many will affect the free fall of the battery cell. For example, the number of buffer strips 21 can be 1, 2, 3, 4, 8, 15, 25, 50, 80, 90, 100, etc.

[0051] If multiple buffer strips 21 are used, they can be arranged close together or spaced apart. The multiple buffer strips 21 can be arranged horizontally, vertically, or in a multi-row, multi-column array.

[0052] The buffer strip 21 is made of natural or synthetic bristles. Natural bristles include, but are not limited to, bristle cushioning components made from animal hair or plant fibers. Animal hair includes, but is not limited to, pig bristles, wool, horsehair, wolf tail hair, and mink hair. Plant fibers include, but are not limited to, sisal and coconut fiber. Synthetic bristles include, but are not limited to, nylon, polyester fiber, PP (polypropylene), PBT (polybutylene terephthalate), and carbon fiber bristles.

[0053] In some embodiments, the buffer strip 21 is made of antistatic bristles (such as carbon fiber bristles).

[0054] In this embodiment, the fastener 3 uses an adhesive sheet with adhesive properties to bond and fix the buffer 2. For example, the fastener 3 can be nylon tape, PET tape, polyimide tape, PVC electrical tape, etc.

[0055] In this embodiment, the buffer 2 can be made of anti-static bristles (such as carbon fiber bristles) to avoid static electricity from attracting dust or damaging the battery cells. Its setting position (especially near high points), quantity and fixing method (such as using nylon tape) can be flexibly adjusted according to specific needs, making it highly adaptable and easy to modify and upgrade based on the existing material box.

[0056] The above descriptions are merely some embodiments of this application. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this application, and all such modifications and improvements fall within the scope of protection of this application.

Claims

1. A battery tab magazine, characterized by: It includes a cartridge body and a buffer; the cartridge body is surrounded by a receiving groove; one end of the buffer is fixed on the cartridge body and the other end extends into the receiving groove; the groove bottom of the receiving groove is a slope structure and has a highest point and a lowest point, and the buffer is arranged above the highest point of the receiving groove or above the adjacent vertex of the highest point.

2. The battery sheet magazine of claim 1, wherein: The cartridge body includes a bottom plate and a surrounding vertical plate, and the bottom plate and the surrounding vertical plate jointly form the receiving groove.

3. The battery sheet magazine of claim 1, wherein: The buffer includes at least one buffer strip.

4. The cell sheet magazine of claim 3, wherein: The number of buffer strips is 2-100.

5. The cell sheet magazine of claim 3, wherein: The buffer strip is a brush.

6. The cell sheet magazine of claim 3, wherein: The buffer strip is an anti-static brush.

7. The cell sheet magazine of claim 1, wherein: The buffer is fixed on the cartridge body by a fixing member; the fixing member is an adhesive tape with adhesive function.

8. The cell sheet magazine of claim 1, wherein: The buffer is provided with multiple buffers, which are arranged around the periphery of the receiving groove.

9. The cell sheet magazine of claim 1, wherein: The buffer is fixedly arranged on the surrounding vertical plate extending in a first direction and / or on the surrounding vertical plate extending in a second direction; the first direction is perpendicular to the second direction.

10. The cell sheet magazine of claim 3, wherein: The number of buffer strips is multiple, and the multiple buffer strips are arranged in any one of the following ways: close, interval, horizontal arrangement, vertical arrangement or multi-row and multi-column array.

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