A battery piece straightening device

Abstract

The application relates to the field of photovoltaic cell processing and manufacturing, in particular to a cell straightening device for cell straightening, one side of the cell being provided with a solder strip, the cell being placed on a bearing base, and the solder strip being defined as the first state with the back facing the bearing base; the straightening device comprises a carrier, the carrier being provided with a straightening surface, the straightening surface being provided with an adsorption function, and the straightening surface being provided in a convex arc shape so that the cell is adsorbed on the straightening surface in the first state, and the cell is straightened. Through the reverse bending cooperation of the cell on the straightening surface, the possibility of damage to the cell in the straightening process is reduced.

Description

Technical Field

[0001] This application relates to the field of photovoltaic cell processing and manufacturing, and in particular to a cell straightening device. Background Technology

[0002] With the continued growth of global demand for new energy, photovoltaic (PV) cells, as a core component of renewable energy, have entered a stage of technological development characterized by high efficiency, large size, and intelligence. Currently, mainstream PV cells, such as PERC, HJT, TOPCon, and BC, have achieved photoelectric conversion efficiencies exceeding 25% through process optimization and material innovation. Simultaneously, the size of monocrystalline silicon wafers has broken through to the 210mm level to meet power density requirements. At the module level, advanced packaging technologies such as shingled and multi-busbar (MBB) have further driven the reduction of the LCOE (Levelized Cost of Electricity) of PV systems. However, in the pursuit of high efficiency and low cost, the mechanical stability issues in the back-end processes of cell manufacturing have become increasingly prominent, becoming a key factor restricting module reliability and production yield.

[0003] In existing technologies, after solar cells are welded with solder strips, they may warp due to thermal and mechanical stresses during the welding process. Warped solar cells require straightening and flattening. However, traditional straightening methods often employ rigid straightening, such as applying pressure directly through upper and lower pressure plates. This method results in uneven stress distribution within the solar cell, easily leading to microcracks and other risks, severely impacting the quality and reliability of the solar cells.

[0004] Therefore, the technical problem with the existing technology is that the risk of damage during cell straightening is relatively high. Utility Model Content

[0005] This application provides a battery cell straightening device, which reduces the possibility of damage to the battery cells during the straightening process by having the battery cells bend in opposite directions on the straightening surface.

[0006] This application provides a battery cell straightening device, which adopts the following technical solution:

[0007] A battery cell straightening device is characterized in that it is used for straightening battery cells, wherein one side of the battery cell has a solder strip, and when the battery cell is placed on a support base, the solder strip of the battery cell facing away from the support base is defined as a first state; the straightening device includes: a carrier, the carrier having a straightening surface, the straightening surface having an adsorption function, the straightening surface being arranged in an outwardly convex arc shape, so that the battery cell is adsorbed onto the straightening surface in the first state, thereby straightening the battery cell.

[0008] Preferably, the carrier is cylindrical, has a rotational degree of freedom to rotate about an axis, and the straightening surface is disposed on the peripheral surface of the carrier.

[0009] Preferably, the system further includes a conveying component, which includes: a first region disposed at the front end of the straightening surface, the first region being used to drive the battery cell into the straightening surface in a first state and to drive the battery cell to the straightening surface in the first state; and a second region disposed at the rear end of the straightening surface, the second region being used to drive the battery cell out of the straightening surface.

[0010] Preferably, the first region and / or the second region have an adsorption function to allow the battery cell to be adsorbed onto the first region and / or the second region.

[0011] Preferably, the second state is defined as the surface of the battery cell solder strip facing the support base; the straightening device further includes a conveying component, the conveying component including: a first region, the first region being disposed at the transmission front end of the straightening surface, the first region being used to transmit the battery cell in the second state and to transmit the battery cell to the straightening surface in the first state; and a second region, the second region being disposed at the transmission rear end of the straightening surface, the second region being used for the transmission output of the battery cell from the straightening surface.

[0012] Preferably, the first area includes: a first feeding area, which is used for feeding battery cells; the first feeding area is used to drive the carrier so that the battery cells are driven from the first feeding area to the straightening surface; wherein the battery cells are in a second state on the first feeding area and in a first state on the straightening surface.

[0013] Preferably, the first area includes: a first feeding area for feeding battery cells and conveying them in a second state; and a second feeding area located on one side of the first feeding area for receiving battery cells from the first feeding area and conveying them to the straightening surface; wherein the battery cells are in the second state on the first feeding area and in the first state on the second feeding area.

[0014] Preferably, the first feeding area and the second feeding area are arranged opposite to each other so that the first feeding area and the second feeding area form a first interaction section; the second feeding area has an adsorption function so that the battery cells located on the first feeding area are transferred to the second feeding area within the first interaction section.

[0015] Preferably, within the first interaction segment, the first feeding area and the second feeding area are parallel or substantially parallel, and a gap H is formed between the first feeding area and the second feeding area, where H≤h, and h is the height of the solar cell warping and arching.

[0016] Preferably, the first feeding area has an adsorption function so that the battery cells are adsorbed onto the first feeding area.

[0017] Preferably, the conveying component further includes: a third zone, the third zone being used to receive and transmit battery cells from the second feeding zone; the third zone being disposed opposite to the second feeding zone so that the third zone and the second feeding zone form a second interaction segment; so that the battery cells located on the second feeding zone are transferred to the third zone within the second interaction segment; wherein the battery cells are in a first state on the second feeding zone and in a second state on the third zone.

[0018] Preferably, the first feeding area and the third area are located below the second feeding area, with the transmission surfaces of the first feeding area and the third area facing downwards, and the transmission surface of the second feeding area facing upwards.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] The convex arc-shaped structure of the straightening surface works in conjunction with the solar cell. Under the action of adsorption, the solar cell tightly adheres to the straightening surface in the opposite direction, achieving straightening. This effectively solves the problem of microcracks and other damage that easily occur during the straightening process of solar cells in existing technologies, improving the straightening quality and reliability of the solar cells. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the first state of the battery cell described in this application;

[0022] Figure 2 This is a schematic diagram of the second state of the battery cell described in this application;

[0023] Figure 3 This is a schematic diagram of the first working state of the carrier described in this application;

[0024] Figure 4 This is a schematic diagram of the second working state of the carrier described in this application;

[0025] Figure 5 This is a first schematic diagram of the transmission component described in this application;

[0026] Figure 6 This is a second schematic diagram of the transmission component described in this application;

[0027] Figure 7This is a third schematic diagram of the transmission component described in this application;

[0028] Figure 8 This is a fourth schematic diagram of the transmission component described in this application;

[0029] Figure 9 This is a fifth schematic diagram of the transmission component described in this application;

[0030] Figure 10 This is a sixth schematic diagram of the transmission component described in this application;

[0031] Figure 11 This is the seventh schematic diagram of the transmission component described in this application;

[0032] Figure 12 yes Figure 11 Enlarged view of A in the middle;

[0033] Figure 13 This is the eighth schematic diagram of the transmission component described in this application;

[0034] Figure 14 This is the ninth schematic diagram of the transmission component described in this application;

[0035] Figure 15 This is the tenth schematic diagram of the transmission component described in this application.

[0036] Explanation of reference numerals in the attached drawings: 110, battery cell; 120, welding strip; 130, supporting base; 200, carrier; 210, straightening surface; 300, conveying assembly; 310, first zone; 311, first loading zone; 312, second loading zone; 313, first interaction section; 320, second zone; 330, third zone; 331, second interaction section. Detailed Implementation

[0037] The serial numbers assigned to components in this document, such as "first" and "second," are used solely to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used solely for the convenience of describing this application and simplifying the description. They 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.

[0038] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] This application provides a battery cell 110 straightening device, which reduces the possibility of damage to the battery cell 110 during the straightening process by having the battery cell 110 bend in opposite directions on the straightening surface 210.

[0040] To better understand the above technical solutions, a detailed description of the technical solutions will be provided below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit the scope of this application.

[0041] In the welding process of the solar cell 110 with the solder ribbon 120, there is a significant difference in the coefficient of thermal expansion between the solder ribbon 120 and the solar cell 110. When the solar cell 110 is subjected to high temperatures, the area covered by the solder ribbon 120 and the surface of the bare solar cell 110 experience asymmetric expansion due to uneven heating. Specifically, the high expansion of the solder ribbon 120 metal material on the solder ribbon 120 side creates local tensile stress, while the surface of the solar cell 110 experiences compressive stress due to the low expansion of silicon. The superposition of these two factors causes the solar cell 110 to exhibit a saddle-shaped warping. This deformation is anisotropic, with a maximum displacement exceeding 30% of the thickness of the solar cell 110, and it exhibits a nonlinear increasing trend as the silicon wafer size increases. In other words, during the welding process, the contact area between the solder ribbon 120 and the solar cell 110 instantly reaches a high temperature, causing non-uniform thermal expansion of local materials (such as the tin alloy layer of the solder ribbon 120, the aluminum grid lines of the solar cell 110, and the silicon substrate); due to the silicon material (coefficient of thermal expansion ~2.6×10⁻⁶), the thermal expansion is further exacerbated. -6 / ℃) and metal solder strip 120 (such as Sn63Pb37, coefficient of thermal expansion 20×10) -6 The significant difference in the coefficients of thermal expansion (°C) leads to asynchronous shrinkage rates during cooling, resulting in residual tensile stress at the interface and forcing the solar cell 110 to bend in the direction of stress release. After the solder ribbon 120 solidifies, it forms a rigid constraint on the surface of the solar cell 110, applying a tensile load to the solar cell 110 during cooling and shrinkage. This causes the side of the solar cell 110 with the solder ribbon 120 to shrink more, while the side without the solder ribbon 120 shrinks less, causing the solar cell 110 to warp towards the side with the solder ribbon 120, i.e., the solar cell 110 arches towards the side without the solder ribbon 120.

[0042] like Figure 1 , 2 As shown, this application addresses the straightening of warped battery cells 110. Generally, after the battery cell 110 warps during welding, its orientation is required to prevent further warping. Specifically, the side of the battery cell 110 with the solder ribbon 120 should face downwards, and the side without the solder ribbon 120 should face upwards, meaning the battery cell 110 is arched upwards. This way, the battery cell 110's own weight provides some resistance to warping on both sides, preventing further warping. Conversely, if the side of the battery cell 110 with the solder ribbon 120 faces upwards and the side without the solder ribbon 120 faces downwards, the warped sides cannot withstand the pressure of its own weight, causing further warping on both sides.

[0043] In this application, the placement state of the battery cell 110 is defined as a first state and a second state. Specifically, when the battery cell 110 is placed on the support base 130, the first state is defined as the solder ribbon 120 facing away from the support base 130, and the direction of the arch of the battery cell 110 facing the support base 130, that is, the non-solder ribbon side of the battery cell faces the support base 130. When the battery cell 110 is placed on the support base 130, the second state is defined as the solder ribbon 120 facing the support base 130, and the direction of the arch of the battery cell 110 away from the support base 130, that is, the solder ribbon side of the battery cell faces the support base 130. It should be noted that the aforementioned support base 130 refers to any object that can place the battery cell 110, and is only used to define the state of the battery cell 110, that is, the orientation of the solder ribbon 120. In this application, the support base 130 can be a first zone 310, a second zone 320, and a third zone 330, etc.

[0044] This application provides a straightening device for a battery cell 110, such as... Figures 3-15 As shown, it includes a carrier 200, a conveying assembly 300, and a second conveying assembly 300. The carrier 200 is used to bend and engage with the battery cell 110 so that the battery cell 110 is positioned on the carrier 200 in a first state for straightening; the conveying assembly 300 is used to input or output the battery cell 110 to the carrier 200.

[0045] like Figure 2 , 3As shown, the carrier 200 is used to engage with the solar cell 110 in a curved manner, so that the solar cell 110 is positioned on the carrier 200 in a first state for straightening. The carrier 200 has a straightening surface 210, which has an adsorption function. The straightening surface 210 is arranged in an outwardly convex arc shape, so that the solar cell 110 is adsorbed on the straightening surface 210 in the first state, thereby straightening the solar cell 110. Specifically, the carrier 200 has a vacuum adsorption structure inside, and the straightening surface 210 has multiple array adsorption holes. When a negative pressure is formed inside the carrier 200, the battery cell 110 is adsorbed onto the straightening surface 210. The battery cell 110 is tightly attached to the straightening surface 210 in a first state. In other words, the non-solder strip 120 side of the battery cell 110 faces the straightening surface 210, and the solder strip 120 side of the battery cell 110 faces away from the straightening surface 210. In this way, the battery cell 110 is adsorbed onto the straightening surface 210 in the opposite direction of warping. The straightening surface 210 straightens the battery cell 110 by resisting warping.

[0046] Preferably, the carrier 200 is cylindrical and has rotational freedom to rotate around an axis. A straightening surface 210 is disposed on the peripheral surface of the carrier 200. This allows for the simultaneous straightening of battery strings or multiple battery cells 110, improving the straightening efficiency of the battery cells 110. When a battery cell 110 is placed on the straightening surface 210 in its first state (i.e., the welding strip 120 faces away from the supporting base 130), the adsorption function of the straightening surface 210 stably adsorbs the battery cell 110 onto it. Since the straightening surface 210 is a convex arc shape, the battery cell 110 will naturally extend along the arc surface under the action of the adsorption force, thereby straightening any warped battery cell 110. In other words, the carrier 200 is cylindrical and has rotational freedom to rotate around an axis; the straightening surface 210 is disposed on the peripheral surface of the carrier 200, and the straightening surface 210 is a convex arc shape with an adsorption function. When the battery cell 110 is adsorbed onto the straightening surface 210 in the first state, the convex arc-shaped straightening surface 210 can generate a uniform supporting force on the battery cell 110, so that the battery cell 110 is subjected to uniform force during the straightening process, avoiding microcracks caused by stress concentration.

[0047] Thus, through the combination of the convex arc-shaped straightening surface 210 and the adsorption function, the stress distribution on the battery cell 110 during the straightening process is uniform, avoiding the problem of microcracks caused by excessive local stress in traditional rigid straightening methods. For example, when the battery cell 110 warps, it is adsorbed onto the straightening surface 210. The curvature of the arc surface allows each part of the battery cell 110 to gradually stretch, and the stress is gradually released, thereby achieving gentle straightening and reducing the risk of damage.

[0048] Understandably, the curvature of the straightening surface 210 can be selected by the size of the battery cell 110.

[0049] like Figures 5-15As shown, the transfer assembly 300 is used to input or output the battery cell 110 to the carrier 200. For example... Figure 5 , 6 As shown, the conveying assembly 300 includes a first region 310 and a second region 320. The first region 310 is disposed at the transmission front end of the straightening surface 210. The first region 310 is used to convey the battery cell 110 in a first state and to transmit the battery cell 110 to the straightening surface 210 in the first state. The second region 320 is disposed at the transmission rear end of the straightening surface 210 and is used for the transmission output of the battery cell 110 from the straightening surface 210. The first region 310 is used to carry and transmit the battery cell 110. The battery cell 110 is located on the first region 310 in the first state. The battery cell 110 is transmitted and input to the straightening surface 210 in the first state from the first region 310. The straightening surface 210 straightens the battery cell 110 by adsorption. Then, the second region 320 receives the battery cell 110 that has been straightened by the straightening surface 210 and transmits the battery cell 110.

[0050] like Figures 5-8 As shown, the first zone 310 and the second zone 320 are located on both sides of the carrier 200. The first zone 310 inputs the battery cell 110 into the carrier 200, and the second zone 320 outputs the battery cell 110 after it has been straightened by the carrier 200. The conveying direction of the first zone 310 is matched with the rotation direction of the carrier 200. When the battery cell 110 is conveyed to the straightening surface 210, it comes into contact with the straightening surface 210 and is attracted. As the carrier 200 rotates, the battery cell 110 completes the straightening process on the straightening surface 210 and is then conveyed to the second zone 320, which conveys the straightened battery cell 110 to the subsequent process.

[0051] In one embodiment, such as Figure 5 , 7 As shown, the first zone 310 and the second zone 320 can be the same conveyor belt. The conveyor belt and the roller-shaped carrier 200 are connected by a transmission. The transmission belt can be driven by a separate drive wheel, or the carrier 200 can be used as the drive wheel to drive the transmission belt. In this way, the battery cell 110 is input through the first zone 310, straightened by the straightening surface 210, and output through the second zone 320. The transmission belt needs to be provided with holes so that the battery cell 110 can be attracted by the straightening surface 210 when it passes through the straightening surface 210.

[0052] In another embodiment, such as Figure 6 , 8As shown, the first zone 310 and the second zone 320 can be conveying units disposed on the input front end and output rear end of the carrier 200, detached from the carrier 200. The conveying unit can be composed of one or more conveyor belts. The conveying unit is not connected to the carrier 200, but only cooperates with the carrier 200. Thus, the carrier 200 needs to be actively rotated to cooperate with the first zone 310 and the second zone 320, so that the carrier 200 can receive the battery cell 110 input from the first zone 310 and output from the second zone 320.

[0053] The first region 310 and / or the second region 320 have an adsorption function; preferably, both the first region 310 and the second region 320 have an adsorption function, which stably adsorbs the battery cell 110 onto the conveying surface, ensuring that the battery cell 110 does not slide or shift during the conveying process. An adsorption structure can be provided on the first region 310 and / or the second region 320, wherein the adsorption structure is a conventional setting and will not be described in detail here; correspondingly, the first region 310 and / or the second region 320 are provided with cavities so that the battery cell 110 can be adsorbed onto the first region 310 and / or the second region 320.

[0054] As one implementation method, such as Figure 5 , 6 As shown, the first region 310 and the second region 320 are respectively disposed on both sides of the carrier 200, and the first region 310 and the second region 320 can be disposed at an angle; as another embodiment, such as Figure 7 , 8 As shown, the first zone 310 and the second zone 320 are arranged horizontally, and the first zone 310 and the second zone 320 are respectively located on the upper and lower sides of the carrier 200. The first zone 310 (or the second zone 320) located on the lower side of the carrier 200 has an adsorption function to prevent the battery cell 110 from falling off.

[0055] Based on the above, the structure of the transmission component 300 has been further optimized. The transmission component 300 may also be implemented in the following ways:

[0056] The conveying assembly 300 includes a first region 310 and a second region 320. The first region 310 is disposed at the front end of the straightening surface 210 and is used to convey the battery cell 110 in a second state and to input the battery cell 110 into the straightening surface 210 in a first state. The second region 320 is disposed at the rear end of the straightening surface 210 and is used to output the battery cell 110 from the straightening surface 210. In other words, the conveying assembly 300 includes a first region 310, which is used to convey the battery cell 110 in a second state (with the solder strip 120 facing the support base 130) and to input the battery cell 110 into the straightening surface 210 in a first state.

[0057] Define the second state as the weld strip 120 facing the bearing foundation 130; such as Figure 9 , 10 As shown, the first area 310 includes a first feeding area 311, which is used for feeding the battery cell 110. The first feeding area 311 is used to drive the carrier 200 so that the battery cell 110 is driven from the first feeding area 311 to the straightening surface 210. The battery cell 110 is in a second state on the first feeding area 311 and in a first state on the straightening surface 210.

[0058] Specifically, such as Figure 9 , 10 As shown, the first area 310 includes a first loading area 311, which is used for loading the battery cells 110 and is in a driving engagement with the carrier 200. When the battery cells 110 are located on the first loading area 311, they are in a second state, i.e., the solder ribbon 120 faces the support base 130. When the battery cells 110 are conveyed to the engagement position between the first loading area 311 and the carrier 200, the straightening surface 210 of the carrier 200 receives and adsorbs the battery cells 110 from the first loading area 311. At this time, the state of the battery cells 110 changes to the first state (the solder ribbon 120 faces away from the support base 130), and they are straightened on the straightening surface 210 as the carrier 200 rotates.

[0059] Optionally, the first feeding area 311 has an adsorption function, which can stably adsorb the battery cell 110 onto the conveying surface of the first feeding area 311, ensuring the accuracy and stability of the battery cell 110 when it is conveyed to the feeding position.

[0060] As one implementation method, such as Figure 9 As shown, the second zone 320 can be a conveyor belt connected to the carrier 200, which can drive the carrier 200 to rotate by setting a separate drive wheel; or the carrier 200 can be used as the drive wheel to drive the conveyor belt.

[0061] As another implementation method, such as Figure 10 As shown, the second zone 320 can be a transmission unit that is detached from the carrier 200 and located at the output rear end of the carrier 200. The transmission unit can be composed of one or more conveyor belts. The transmission unit is not connected to the carrier 200, but only cooperates with the carrier 200 to make the carrier 200 rotate to cooperate with the output of the battery cell 110 of the second zone 320.

[0062] Furthermore, the conveyor assembly 300 is equipped with a dual-feeding zone structure. Specifically, as shown... Figure 11 , 12As shown in Figure 13, the first area 310 includes a first feeding area 311 and a second feeding area 312: the first feeding area 311 is used for feeding the battery cells 110 and conveying the battery cells 110 in a second state; the second feeding area 312 is located on one side of the first feeding area 311 and is used to receive the battery cells 110 from the first feeding area 311 and transmit them to the straightening surface 210; wherein, the battery cells 110 are in the second state on the first feeding area 311 and in the first state on the second feeding area 312. Specifically, the first feeding area 311 is used for feeding the battery cells 110 and conveying the battery cells 110 in a second state; the second feeding area 312 is located on one side of the first feeding area 311 and is used to receive the battery cells 110 from the first feeding area 311 and transmit them to the straightening surface 210. The battery cells 110 are in a second state on the first feeding area 311 and in a first state on the second feeding area 312.

[0063] Furthermore, such as Figure 11 , 12 As shown, the first feeding area 311 and the second feeding area 312 are arranged opposite to each other, so that the first feeding area 311 and the second feeding area 312 form a first interaction section 313; the second feeding area 312 has an adsorption function, so that the battery cell 110 located on the first feeding area 311 is transferred to the second feeding area 312 within the first interaction section 313. Within the first interaction section 313, the first feeding area 311 and the second feeding area 312 are parallel or substantially parallel, and a gap H is formed between the first feeding area 311 and the second feeding area 312, and H≤h, where h is the height of the warped and arched battery cell 110.

[0064] like Figure 11 , 12As shown, the first feeding area 311 and the second feeding area 312 are arranged opposite to each other to form a first interaction section 313. The second feeding area 312 has an adsorption function. Within the first interaction section 313, the first feeding area 311 and the second feeding area 312 are parallel or substantially parallel, with a gap H between them, where H ≤ h (h is the height of the warped and arched solar cell 110). Specifically, when the solar cell 110 is conveyed to the first interaction section 313 along with the first feeding area 311, the second feeding area 312 adsorbs the solar cell 110 from the first feeding area 311 through its adsorption function. Since the gap H is small, less than or equal to the height h of the warped and arched solar cell 110, the warped part of the solar cell 110 can pass smoothly through the gap H, realizing the transition from the second state to the first state, and is stably adsorbed on the second feeding area 312. In other words, when the battery cell 110 enters the first interaction section 313, the second feeding area 312 activates the adsorption function, allowing the battery cell 110 to be transferred from the first feeding area 311 to the second feeding area 312. It should be noted that when the battery cell 110 is transferred from the first feeding area 311 to the second feeding area 312, the first feeding area 311 does not have the adsorption function.

[0065] Furthermore, by controlling the gap H to be less than or equal to the height h of the warped arch of the battery cell 110, the arched battery cell 110 can be pre-flattened by the clamping action of the first feeding zone 311 and the second feeding zone 312, further improving the straightening effect of the battery cell 110. The second feeding zone 312 conveys the battery cell 110 in the first state to the straightening surface 210, where the straightening surface 210 adsorbs the battery cell 110 and performs straightening treatment. The straightened battery cell 110 is then conveyed to the second zone 320, which conveys the battery cell 110 to subsequent processes.

[0066] Optionally, the first feeding area 311 has an adsorption function, which can stably adsorb the battery cell 110 on the conveying surface of the first feeding area 311, ensuring the accuracy and stability of the battery cell 110 when it is conveyed to the feeding position. The switching of the battery cell 110 between the first feeding area 311 and the second feeding area 312 can be achieved by controlling the adsorption function on the first feeding area 311 and the second feeding area 312. For example, by canceling the adsorption function on the first feeding area 311 and activating the adsorption function on the second feeding area 312, the battery cell 110 can be transferred from the first feeding area 311 to the second feeding area 312, and the state can be switched from the second state to the first state.

[0067] In one embodiment, such as Figure 11As shown, the second feeding zone 312 and the second zone 320 can be the same conveyor belt. The conveyor belt and the roller-shaped carrier 200 are connected by a drive. The conveyor belt can be driven by a separate drive wheel, or the carrier 200 can be used as the drive wheel to drive the conveyor belt. In this way, the battery cell 110 is input through the second feeding zone 312, straightened by the straightening surface 210, and output through the second zone 320. The drive belt needs to be provided with holes so that the battery cell 110 can be attracted by the straightening surface 210 when it passes over the straightening surface 210.

[0068] In another embodiment, such as Figure 13 As shown, the second feeding zone 312 and the second zone 320 can be conveying units disposed on the input front end and output rear end of the carrier 200, detached from the carrier 200. The conveying unit can be composed of one or more conveyor belts. The conveying unit is not connected to the carrier 200, but only cooperates with the carrier 200. Thus, the carrier 200 needs to be actively rotated to cooperate with the second feeding zone 312 and the second zone 320, so that the carrier 200 can receive the battery cell 110 input from the second feeding zone 312 and output from the second zone 320.

[0069] The battery cell 110 needs to be straightened in the first state. However, in order to prevent the battery cell 110 from warping again, it is necessary to keep the battery cell 110 in the second state after straightening. Therefore, in order to keep the output battery cell 110 in the second state to prevent warping, this application sets a third zone 330 so that the straightened battery cell 110 switches from the first state to the second state.

[0070] Furthermore, such as Figure 14 , 15 As shown, the conveying assembly 300 further includes a third zone 330, which is used to receive and transmit the battery cell 110 from the second loading zone 312. The third zone 330 is arranged opposite to the second loading zone 312 so that the third zone 330 and the second loading zone 312 form a second interaction section 331. The battery cell 110 located on the second loading zone 312 is transferred to the third zone 330 within the second interaction section 331. The battery cell 110 is in a first state on the second loading zone 312 and in a second state on the third zone 330.

[0071] In one embodiment, such as Figure 14 , 15As shown, the first feeding area 311 and the third feeding area 330 are located below the second feeding area 312, with the transmission surfaces of the first feeding area 311 and the third feeding area 330 facing downwards, and the transmission surface of the second feeding area 312 facing upwards. Specifically, the first feeding area 311 and the third feeding area 330 are located below the second feeding area 312, with the transmission surfaces of the first feeding area 311 and the third feeding area 330 facing downwards, and the transmission surface of the second feeding area 312 facing upwards. This vertical arrangement allows the battery cell 110 to be conveyed in the first loading area 311 in the second state (supporting base 130 with the welding ribbon 120 facing downwards), and then transferred to the second loading area 312 via the first interaction section 313. At this point, the state of the battery cell 110 changes to the first state (transmission surface of the second loading area 312 with the welding ribbon 120 facing upwards). After being conveyed in the second loading area 312 and straightened by the straightening surface 210, it is transferred to the third area 330 via the second interaction section 331. The state changes back to the second state (transmission surface of the third area 330 with the welding ribbon 120 facing downwards), and is then conveyed from the third area 330 to the subsequent process. It should be noted that the battery cell 110, after being straightened by the straightening surface 210, is in its first state. Therefore, it needs to circulate once on the conveying assembly 300 before returning to the second loading area 312, and then be transferred from the second loading area 312 to the third area 330 on the second interaction section 331. This transfer of the battery cell 110 can be achieved by canceling the adsorption function on the second loading area 312. It is understood that the positions of the first loading area 311 and the third area 330 can be interchanged. More preferably, on the second loading area 312, the adsorption functions on the first interaction section 313 and the second interaction section 331 can be controlled independently.

[0072] Throughout the entire transfer process, the adsorption functions of each zone work together to ensure the stable transfer and shifting of the battery cell 110 in different states, thus avoiding damage to the battery cell 110 caused by improper state transitions during the transfer process.

[0073] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0074] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A battery cell straightening device, characterized in that, For straightening a battery cell (110), the battery cell (110) has a solder strip (120) on one side, and when the battery cell (110) is placed on a support base (130), the first state is defined as the solder strip (120) of the battery cell (110) facing away from the support base (130); the straightening device includes: The carrier (200) has a straightening surface (210) on it. The straightening surface (210) has an adsorption function. The straightening surface (210) is arranged in an outwardly convex arc shape, so that the battery cell (110) is adsorbed on the straightening surface (210) in a first state, so as to straighten the battery cell (110).

2. The battery cell straightening device according to claim 1, characterized in that, The carrier (200) is cylindrical and has a rotational degree of freedom to rotate about an axis. The straightening surface (210) is disposed on the peripheral surface of the carrier (200).

3. The battery cell straightening device according to claim 2, characterized in that, It also includes a transmission component (300), the transmission component (300) comprising: The first region (310) is disposed at the transmission front end of the straightening surface (210). The first region (310) is used to transmit the battery cell (110) in a first state to the battery cell (110) and to transmit the battery cell (110) to the straightening surface (210) in a first state. The second region (320) is located at the transmission rear end of the straightening surface (210) and is used for the transmission output of the battery cell (110) of the straightening surface (210).

4. A battery cell straightening device according to claim 3, characterized in that, The first region (310) and / or the second region (320) have an adsorption function so that the battery cell (110) is adsorbed in the first region (310) and / or the second region (320).

5. A battery cell straightening device according to claim 2, characterized in that, The second state is defined as the surface of the solar cell (110) solder strip (120) facing the support base (130); the straightening device further includes a conveying assembly (300), the conveying assembly (300) comprising: The first region (310) is disposed at the transmission front end of the straightening surface (210). The first region (310) is used to transmit the battery cell (110) in the second state to the battery cell (110) and transmit the battery cell (110) to the straightening surface (210) in the first state. The second region (320) is located at the transmission rear end of the straightening surface (210) and is used for the transmission output of the battery cell (110) of the straightening surface (210).

6. A battery cell straightening device according to claim 5, characterized in that, The first region (310) includes: The first feeding area (311) is used for feeding the battery cell (110); the first feeding area (311) is used to drive the carrier (200) so that the battery cell (110) is driven from the first feeding area (311) to the straightening surface (210). Among them, the battery cell (110) is located on the first feeding area (311) in a second state, and the battery cell (110) is located on the straightening surface (210) in a first state.

7. A battery cell straightening device according to claim 5, characterized in that, The first region (310) includes: The first feeding area (311) is used for feeding the battery cells (110) and conveying the battery cells (110) in a second state; The second feeding area (312) is located on one side of the first feeding area (311). The second feeding area (312) is used to receive the battery cells (110) from the first feeding area (311) and transport them to the straightening surface (210). Among them, the battery cell (110) is in the second state on the first feeding area (311), and the battery cell (110) is in the first state on the second feeding area (312).

8. A battery cell straightening device according to claim 7, characterized in that, The first feeding area (311) and the second feeding area (312) are arranged opposite to each other so that the first feeding area (311) and the second feeding area (312) form a first interaction section (313); the second feeding area (312) has an adsorption function so that the battery cell (110) located on the first feeding area (311) is transferred to the second feeding area (312) within the first interaction section (313).

9. A battery cell straightening device according to claim 8, characterized in that, Within the first interactive section (313), the first feeding area (311) and the second feeding area (312) are parallel or substantially parallel, and a gap H is formed between the first feeding area (311) and the second feeding area (312), and H≤h, where h is the height of the warped and arched battery cell (110).

10. A battery cell straightening device according to claim 6 or 7, characterized in that, The first feeding area (311) has an adsorption function so that the battery cell (110) is adsorbed onto the first feeding area (311).

11. The battery cell straightening device according to claim 8, characterized in that, The transmission component (300) further includes: A third zone (330) is configured to receive and transmit battery cells (110) from the second loading zone (312); the third zone (330) is disposed opposite to the second loading zone (312) to form a second interaction section (331); so that the battery cells (110) located on the second loading zone (312) are transferred to the third zone (330) within the second interaction section (331); Among them, the battery cell (110) is located in the second feeding area (312) in a first state, and the battery cell (110) is located in the third area (330) in a second state.

12. The battery cell straightening device according to claim 11, characterized in that, The first feeding area (311) and the third area (330) are located below the second feeding area (312), with the transmission surfaces of the first feeding area (311) and the third area (330) facing downwards, and the transmission surface of the second feeding area (312) facing upwards.

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