A battery piece flattening device

Abstract

The application relates to the technical field of photovoltaic module manufacturing, and provides a cell piece flattening device, which comprises a lower cushion base, an upper cushion base and a flexible layer. The lower cushion base comprises a lower rubber cushion, the upper cushion base is arranged opposite to the lower cushion base and comprises an upper rubber cushion; the flexible layer is arranged on a side surface of the lower rubber cushion facing the upper rubber cushion and on a side surface of the upper rubber cushion facing the lower rubber cushion; a temperature control flow channel is arranged in the lower rubber cushion and / or the upper rubber cushion, and the temperature control flow channel is used for containing circulating medium to adjust the temperature of the lower rubber cushion and the upper rubber cushion. The application can perform flexible flattening on the cell piece, and through the integration of the temperature control flow channel in the upper rubber cushion and the lower rubber cushion, the cell piece can be actively cooled on both sides simultaneously by using the circulating medium, the heat dissipation efficiency and the temperature uniformity are improved, the mechanical damage risk and the thermal damage risk of the cell piece are effectively reduced, and therefore the flatness of the cell piece and the yield of finished products are ensured.

Description

Technical Field

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

[0002] With the rapid development of the photovoltaic industry, the market has placed higher demands on the conversion efficiency and product quality of photovoltaic modules, which has continuously driven the improvement and innovation of photovoltaic module manufacturing processes. Back contact (BC) cells, due to their advantage of having no grid lines blocking the front side and effectively improving photoelectric conversion efficiency, have become one of the core technology directions for the next generation of high-efficiency photovoltaic modules.

[0003] In the production of BC modules, multiple BC cells need to be connected in series using solder ribbons to form a cell string. However, because the electrodes of the BC cells are all located on the back side, the distribution of their welding points and the welding stress are unique, making the cells prone to significant bending deformation after welding. This bending problem not only seriously affects the normal progress of subsequent processes such as stacking and lamination, but also adversely affects the appearance quality and long-term reliability of the final photovoltaic module. If the bending of the cells is too large, it may even render the entire cell string unusable, directly causing a decrease in product yield.

[0004] Currently, the industry commonly uses a reverse bending shaping method to solve the bending problem of BC battery strings. First, the bent battery cell is fixed using suction cups. Then, a mechanical mechanism is used to lift the bending point from below, applying a force opposite to the bending direction to achieve physical reverse bending. Simultaneously, to prevent residual welding heat from continuously affecting the battery cell during the shaping process, this process is usually supplemented with airflow for cooling.

[0005] However, due to the thinness and brittleness of BC solar cells, direct contact and lifting of the cells through mechanical mechanisms can easily cause irreversible damage such as microcracks and fragmentation, increasing production losses. Furthermore, due to the low thermal conductivity of air and its limited heat dissipation efficiency, it is difficult to achieve rapid and uniform temperature control of the solar cells by using air cooling methods. This can easily create temperature differences inside the solar cells, causing additional thermal stress, and may even lead to new deformations or stress concentrations in the solar cells due to uneven temperature distribution, thereby exacerbating product quality risks.

[0006] Therefore, how to avoid mechanical and thermal damage to the solar cells during efficient leveling and thermal stress relief, thereby ensuring the flatness of the solar cells and the yield of finished products, is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] In view of this, this application provides a battery cell leveling device that can solve the problem of how to avoid mechanical and thermal damage to battery cells when performing efficient leveling and thermal stress relief, thereby ensuring the flatness of the battery cells and the yield of finished products.

[0008] This application provides a battery cell leveling device, including a lower pad, an upper pad, and a flexible layer.

[0009] Specifically, the lower pad includes a lower adhesive pad; the upper pad is disposed opposite to the lower pad and includes an upper adhesive pad; a flexible layer is disposed on the side surface of the lower adhesive pad facing the upper adhesive pad, and on the side surface of the upper adhesive pad facing the lower adhesive pad.

[0010] The lower and / or upper rubber pads are provided with temperature-controlled flow channels, which are used to contain circulating media.

[0011] According to the embodiments of this application, the above-described technical solution of this application has at least the following beneficial effects:

[0012] By using upper and lower adhesive pads with flexible layers, point / line pressure is transformed into uniformly distributed surface pressure during the extrusion shaping process, achieving continuous and gentle flattening of the large-area solar cells. This effectively overcomes the problem of localized stress concentration caused by traditional mechanical lifting methods, preventing microcracks or breakage of the solar cells. By integrating temperature-controlled flow channels within the upper and lower adhesive pads, a circulating medium is used to simultaneously and actively cool the solar cells on both sides. Compared to traditional air-blowing cooling methods, this method has higher heat conduction efficiency and temperature uniformity, quickly eliminating residual heat from welding and preventing thermal damage caused by temperature gradients. Therefore, while flexibly flattening the solar cells, it improves heat dissipation efficiency and temperature uniformity, effectively reducing the risk of mechanical and thermal damage to the solar cells, thereby ensuring the flatness of the solar cells and the yield of the finished product.

[0013] In some embodiments of this application, the side of the lower rubber pad facing the upper rubber pad is a concave structure, and the side of the upper rubber pad facing the lower rubber pad is a convex structure, with the convex structure and the concave structure being adapted to each other.

[0014] According to the embodiments of this application, by setting the side surface of the lower adhesive pad used for pressing and bonding the battery cell to a concave surface and setting the side surface of the upper adhesive pad used for pressing and bonding the battery cell to a convex surface, the shape of the battery cell after being pressed is opposite to its initial bending shape. That is, by bending in the opposite direction, the battery cell can be quickly leveled and corrected, effectively improving the leveling efficiency.

[0015] In some embodiments of this application, the lower pad also includes a lower water inlet and a lower water outlet.

[0016] Specifically, the lower water inlet is located on the lower rubber pad and is connected to the temperature control channel inside the lower rubber pad, for connecting to the circulating water outlet of the external cooling circulation unit; the lower water outlet is located on the lower rubber pad and is connected to the temperature control channel inside the lower rubber pad, for connecting to the circulating water inlet of the external cooling circulation unit.

[0017] According to the embodiments of this application, a cooling circulation water path is formed for the lower rubber pad based on the flow process of the coolant from "external cooling circulation unit - lower inlet - temperature control channel - lower outlet - external cooling circulation unit", thereby achieving temperature control of the lower rubber pad and actively cooling one side surface of the battery cell that is in contact with the lower rubber pad.

[0018] In some embodiments of this application, the upper pad also includes an upper water inlet and an upper water outlet.

[0019] Specifically, the upper water inlet is located on the upper rubber pad and is connected to the temperature control channel inside the upper rubber pad, for connecting to the circulating water outlet of the external cooling circulation unit; the upper water outlet is located on the upper rubber pad and is connected to the temperature control channel inside the upper rubber pad, for connecting to the circulating water inlet of the external cooling circulation unit.

[0020] According to the embodiments of this application, a cooling circulation water path is formed for the upper rubber pad based on the flow process of the coolant from "external cooling circulation unit - upper inlet - temperature control channel - upper outlet - external cooling circulation unit", thereby realizing temperature control of the upper rubber pad and actively cooling one side surface of the battery cell that is in contact with the upper rubber pad.

[0021] In some embodiments of this application, the lower pad platform further includes a lower base extending along a first direction and a plurality of lower rubber pads, the plurality of lower rubber pads being fixedly installed on the lower base along the first direction; the upper pad platform further includes an upper base extending along the first direction and a plurality of upper rubber pads, the plurality of upper rubber pads being fixedly installed on the upper base along the first direction, the plurality of upper rubber pads and the plurality of lower rubber pads being arranged in a one-to-one correspondence.

[0022] According to the embodiments of this application, based on the multiple upper and lower adhesive pads provided by the battery cell leveling device, multiple battery cells can be placed on the lower pad at the same time, thereby enabling multiple battery cells to be slowly squeezed and leveled at the same time, improving the efficiency of the battery cell leveling process.

[0023] In some embodiments of this application, the temperature of the circulating medium in the temperature-controlled channels of the multiple upper rubber pads is the same as that in the temperature-controlled channels of the multiple lower rubber pads.

[0024] According to the embodiments of this application, the temperature consistency of the circulating medium in the upper and lower adhesive pads can be effectively ensured, avoiding thermal damage caused by uneven heating on both sides of the battery cell.

[0025] In some embodiments of this application, both the lower and upper rubber pads are integrally molded parts.

[0026] According to the embodiments of this application, the integrally molded upper and lower rubber gaskets have more reliable sealing performance and are easier to process.

[0027] In some embodiments of this application, the battery cell leveling device further includes an adsorption component, which is fixedly installed on the lower base and respectively disposed on opposite sides of the lower rubber pad, for connecting to an external vacuum system and adsorbing and fixing the battery cells.

[0028] According to the embodiments of this application, the battery cells are adsorbed and fixed by the cooperation of the external vacuum system and the adsorption component. Before the battery cells are leveled, they can be stably and securely fixed on the buffer pad without slippage. This ensures that the battery cells will not move as the upper adhesive pad moves downward and gradually increases the contact area with the battery cells, thus ensuring that the leveling work can be carried out smoothly.

[0029] In some embodiments of this application, the adsorption component includes a buffer pad for flexible contact with the battery cell.

[0030] According to the embodiments of this application, the buffer pad is used to prevent the edge of the battery cell from making hard contact with the nozzle, thereby avoiding damage to the battery cell structure caused by hard contact, especially avoiding damage to the electrode structure of the battery cell.

[0031] In some embodiments of this application, the adsorption assembly further includes a suction nozzle and a connector.

[0032] Specifically, one end of the suction nozzle is fixedly installed on the lower base, and the other end is the suction surface. The suction nozzle extends along the second direction and is located on one side of the lower rubber pad. The second direction is perpendicular to the first direction, and the suction nozzle has a cavity inside.

[0033] Specifically, the buffer pad is fixedly installed on the adsorption surface, and the buffer pad is provided with a suction nozzle that communicates with the cavity.

[0034] Specifically, the connector is directly or indirectly connected to the cavity for connection to an external vacuum system.

[0035] In some embodiments of this application, the adsorption assembly further includes a gas delivery pipe disposed within the lower base and extending along a second direction. One end of the gas delivery pipe is connected to a connector, and the interior of the gas delivery pipe communicates with a cavity. The diameter of the gas delivery pipe is adapted to the diameter of the cavity.

[0036] According to the embodiments of this application, because the diameter of the gas supply pipe is small, that is, the internal space of the gas supply pipe is small, the inside of the gas supply pipe can be quickly filled with compressed air, and the compressed air can be delivered to the external vacuum system more quickly, thereby achieving rapid adsorption of the battery cell. Correspondingly, when the external vacuum system stops pumping air and begins to deliver air into the cavity, the battery cell can be quickly released. Attached Figure Description

[0037] Figure 1 This is a three-dimensional structural diagram of the battery cell leveling device in the embodiment of this application when it extrudes the battery cell;

[0038] Figure 2 This is a front view of the battery cell shape when the battery cell leveling device in this embodiment of the application does not apply force to the battery cell;

[0039] Figure 3 This is a partial structural cross-sectional view of the lower pad platform in an embodiment of this application;

[0040] Figure 4 This is a partial structural cross-sectional view of the upper pad in an embodiment of this application;

[0041] Figure 5 This is a front view of the battery cell shape after the adsorption component in the embodiment of this application has been activated;

[0042] Figure 6 This is a three-dimensional structural cross-sectional view of the adsorption component in the embodiments of this application;

[0043] Figure 7 This is another structural schematic diagram of the adsorption component in the embodiments of this application.

[0044] Figure label:

[0045] 1. Lower platform; 101. Lower rubber pad; 102. Lower water inlet; 103. Lower water outlet; 104. Lower base; 105. Adsorption assembly; 1051. Buffer pad; 1052. Suction nozzle; 1053. Connector; 1054. Adsorption surface; 1055. Cavity; 1056. Suction nozzle opening; 1057. Air supply pipe;

[0046] 2. Install the upper support platform; 201. Install the upper rubber pad; 202. Install the upper water inlet; 203. Install the upper water outlet; 204. Install the upper base;

[0047] 3. Battery cell; 4. Flexible layer; 5. Temperature control flow channel. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] The technical problems to be solved by the embodiments of this application will be described below.

[0050] As described in the background technology section above, the commonly used method in the industry to solve the bending problem of BC battery strings is the reverse bending shaping method: First, the bent battery cell is fixed by a suction cup. Then, a mechanical mechanism is used to lift the bending point of the battery cell from below, applying a force opposite to the bending direction to achieve physical reverse bending. At the same time, to prevent residual heat from welding from continuously affecting the battery cell during the shaping process, this process is usually supplemented with air blowing for cooling.

[0051] However, due to the thinness and brittleness of BC solar cells, direct contact and lifting of the cells through mechanical mechanisms can easily cause irreversible damage such as microcracks and fragmentation, increasing production losses. Furthermore, due to the low thermal conductivity of air and its limited heat dissipation efficiency, it is difficult to achieve rapid and uniform temperature control of the solar cells by using air cooling methods. This can easily create temperature differences inside the solar cells, causing additional thermal stress, and may even lead to new deformations or stress concentrations in the solar cells due to uneven temperature distribution, thereby exacerbating product quality risks.

[0052] Therefore, how to avoid mechanical and thermal damage to the solar cells during efficient leveling and thermal stress relief, thereby ensuring the flatness of the solar cells and the yield of finished products, is a technical problem that urgently needs to be solved by those skilled in the art.

[0053] Therefore, to solve the above problems, this application provides a battery cell leveling device. Through upper and lower adhesive pads with flexible layers, point / line pressure is converted into uniformly distributed surface pressure during the extrusion forming process, achieving continuous and gentle flattening of the battery cell over a large area. This effectively overcomes the problem of localized stress concentration caused by traditional mechanical lifting methods, preventing microcracks or breakage of the battery cell. By integrating temperature-controlled flow channels within the upper and lower adhesive pads, and using a circulating medium for simultaneous active cooling of both sides of the battery cell, this method has higher heat conduction efficiency and temperature uniformity compared to traditional air-blowing cooling. It can quickly eliminate residual heat from welding and prevent thermal damage caused by temperature gradients. Therefore, while flexibly leveling the battery cell, it improves heat dissipation efficiency and temperature uniformity, effectively reducing the risk of mechanical and thermal damage to the battery cell, thereby ensuring the flatness of the battery cell and the yield of the finished product.

[0054] The following is combined with Figures 1 to 4 The solution corresponding to the battery cell leveling device in the embodiments of this application will be described in detail.

[0055] refer to Figure 1 and Figure 2 , Figure 1 This is a three-dimensional structural diagram of the battery cell leveling device in this application when it extrudes the battery cell. Figure 2 This is a front view of the structure of the battery cell leveling device in the embodiments of this application when no force is applied to the battery cell.

[0056] like Figure 1 As shown in the embodiments of this application, the battery cell leveling device may include a lower pad 1 and an upper pad 2.

[0057] The lower pad 1 may include a lower adhesive pad 101.

[0058] The upper pad 2 is disposed opposite to the lower pad 1, and includes an upper adhesive pad 201 disposed opposite to the lower adhesive pad 101.

[0059] For the curved battery cell 3, it has two curved sides extending along direction A (corresponding to the first direction) and two flat sides extending along direction B (corresponding to the second direction). Direction B is perpendicular to direction A.

[0060] like Figure 1 and Figure 2 As shown, after the battery cell 3 is stably placed, the upper pad 2 is brought close to the lower pad 1, so that the upper adhesive pad 201 slowly contacts and squeezes the battery cell 3, and finally the battery cell 3 is made to adhere to the opposite surfaces of the upper adhesive pad 201 and the lower adhesive pad 101, thus completing the compression and shaping of the battery cell 3.

[0061] Preferably, in this embodiment of the application, the side of the lower adhesive pad 101 facing the upper adhesive pad 201 is a concave structure, and the side of the upper adhesive pad 201 facing the lower adhesive pad 101 is a convex structure, with the convex structure and the concave structure being compatible.

[0062] For the battery cell 3 that needs to be leveled, when it is placed on the lower pad 1, the two curved sides bend towards the upper adhesive pad 201. In order to achieve leveling of the battery cell 3, the opposing surfaces of the upper adhesive pad 201 and the lower adhesive pad 101 can be flat, but using a flat surface for leveling requires maintaining a compression state for a long time, resulting in low leveling efficiency.

[0063] In this embodiment, the lower adhesive pad 101 is set as a concave surface for pressing and bonding the battery cell 3, and the upper adhesive pad 201 is set as a convex surface for pressing and bonding the battery cell 3. This makes the shape of the battery cell 3 after being pressed opposite to its initial bending shape. In other words, by bending in the opposite direction, the battery cell 3 can be quickly leveled and corrected, which effectively improves the leveling efficiency.

[0064] like Figure 2 As shown in the embodiment of this application, the battery cell leveling device may further include a flexible layer 4. The flexible layer 4 is disposed on the side surface of the lower adhesive pad 101 facing the upper adhesive pad 201, and on the side surface of the upper adhesive pad 201 facing the lower adhesive pad 101. The flexible layer 4 is used to flexibly compress and adhere to the surface of the battery cell 3. Therefore, during the process of the upper adhesive pad 201 and the lower adhesive pad 101 slowly approaching and compressing the battery cell 3, the opposing surfaces of the upper adhesive pad 201 and the lower adhesive pad 101, as well as the battery cell 3, will undergo uniform elastic deformation at the micrometer level under pressure. This transforms point / line pressure into uniform surface pressure acting on the entire battery cell 3, and then continuously applies a pre-set pressure intensity to the battery cell 3, gradually correcting the bending deformation of the battery cell 3. Based on this uniform surface pressure, continuous and gentle flattening of the battery cell 3 is achieved, overcoming the mechanical stress inside the battery cell 3, allowing the battery cell 3 to return to an ideal planar state without causing local overload and breakage due to uneven pressure.

[0065] Once the preset leveling and extrusion time is reached, the upper pad 2 moves upward, releasing the extrusion and shaping of the battery cell 3, thus completing the leveling process of the battery cell 3.

[0066] When picking up and placing the battery cell 3, there is an operating space between the upper pad 2 and the lower pad 1, that is, the upper pad 2 is far away from the lower pad 1, so as to pick up and place the battery cell 3.

[0067] In this application, the method of placing the battery cell 3 is not limited. For example, the battery cell 3 can be held by a robotic arm and placed on the lower pad 1, or the battery cell 3 can be manually picked up and placed on the lower pad 1.

[0068] This application does not limit the method of driving the upper pad 2 to move downward. For example, the upper pad 2 can be driven to move downward by a precision guide rail or by a hydraulic device.

[0069] refer to Figure 3 and Figure 4 ,in, Figure 3 This is a partial structural cross-sectional view of the lower support platform 1 in an embodiment of this application. Figure 4 This is a partial structural cross-sectional view of the upper pad 2 in the embodiments of this application.

[0070] like Figure 3 and Figure 4 As shown in the embodiment of this application, a temperature control channel 5 is provided in the lower rubber pad 101 and / or the upper rubber pad 201. The temperature control channel 5 is used to contain the circulating medium to regulate the temperature of the lower rubber pad 101 and the upper rubber pad 201.

[0071] The temperature of the circulating medium in the temperature-controlled flow channel 5 is controllable. By adjusting the temperature of the circulating medium, the temperatures of the circulating medium in the upper adhesive pad 201 and the lower adhesive pad 101 can be made the same, thereby allowing the battery cells to be bonded to the surfaces of the upper adhesive pad 201 and the lower adhesive pad 101 respectively (see reference). Figure 2 When the surface of the solar cell 3) is cooled, both sides of the solar cell can be cooled simultaneously and uniformly, resulting in more efficient cooling. Furthermore, the uniform active cooling on both sides effectively avoids thermal damage to the solar cell caused by uneven temperature distribution. It can be understood that the temperature-controlled flow channel 5 is a channel used to contain and ensure the flow of a circulating medium with a controllable temperature.

[0072] In this embodiment, the circulating medium in the temperature control channel 5 of the upper rubber pad 201 and the lower rubber pad 101 can be coolant, and the temperature control channel 5 is connected to an external cooling circulation unit.

[0073] like Figures 1 to 4 As shown, compared with the prior art, the battery cell leveling device provided in this application, through the upper adhesive pad 301 and lower adhesive pad 101 with flexible layer 4, transforms the point / line pressure into a uniformly distributed surface pressure during the extrusion shaping process, thereby achieving continuous and gentle flattening of the battery cell 3 over a large area. This effectively overcomes the problem of local stress concentration caused by traditional mechanical lifting methods and avoids microcracks or breakage of the battery cell 3. By integrating a temperature control channel 5 within the upper adhesive pad 201 and lower adhesive pad 101, heat is carried away by the flow of circulating medium within the temperature control channel, thereby achieving simultaneous active cooling of both sides of the battery cell 3. Compared with the traditional air-blowing cooling method, this has higher heat conduction efficiency and temperature uniformity, which can quickly eliminate residual welding heat and prevent thermal damage caused by temperature gradients. Therefore, while flexibly leveling the battery cell 3, it can improve heat dissipation efficiency and temperature uniformity, effectively reducing the risk of mechanical and thermal damage to the battery cell 3, thereby ensuring the flatness of the battery cell 3 and the yield of the finished product.

[0074] In some other embodiments of this application, the circulating medium may also be cryogenic air. Cryogenic air also has the effect of absorbing heat and cooling down, which can cool down the battery cell 3. Cooling based on cryogenic air that is uniformly distributed and rapidly circulated in the temperature control channel 5 has better temperature uniformity than air blowing, which can avoid uneven stress distribution caused by uneven cooling and thus reduce the probability of thermal damage.

[0075] like Figure 2As shown in the embodiments of this application, the lower pad 1 may further include a lower water inlet 102 and a lower water outlet 103.

[0076] like Figure 2 and Figure 3 As shown, the lower water inlet 102 is disposed on the lower rubber pad 101 and is connected to the temperature control channel 5 inside the lower rubber pad 101, for connecting to the circulating water outlet of the external cooling circulation unit; the lower water outlet 103 is disposed on the lower rubber pad 101 and is connected to the temperature control channel 5 inside the lower rubber pad 101, for connecting to the circulating water inlet of the external cooling circulation unit.

[0077] Based on the flow process of the coolant from "external cooling circulation unit - lower inlet 102 - temperature control channel 5 - lower outlet 103 - external cooling circulation unit", a cooling circulation water path is formed for the lower rubber pad 101, thereby achieving temperature control of the lower rubber pad 101 and continuously and actively cooling one side surface of the battery cell that is in contact with the lower rubber pad 101.

[0078] like Figure 2 As shown in the embodiment of this application, the upper pad 2 may further include an upper water inlet 202 and an upper water outlet 203.

[0079] like Figure 2 and Figure 4 As shown, the upper water inlet 202 is disposed on the upper rubber pad 201 and communicates with the temperature control channel 5 inside the upper rubber pad 201, for connection to the circulating water outlet of the external cooling circulation unit. The upper water outlet 203 is disposed on the upper rubber pad 201 and communicates with the temperature control channel 5 inside the upper rubber pad 201, for connection to the circulating water inlet of the external cooling circulation unit.

[0080] Based on the flow process of the coolant from "external cooling circulation unit - upper inlet 202 - temperature control channel 5 - upper outlet 203 - external cooling circulation unit", a cooling circulation water path is formed for the upper rubber pad 201, thereby achieving temperature control of the upper rubber pad 201 and continuously and actively cooling one side surface of the battery cell that is in contact with the upper rubber pad 201.

[0081] like Figures 1 to 4 As shown, when leveling the battery cell 3, the cooling circulation unit needs to be started first, so that the coolant is pumped into the temperature control channel 5 in the upper pad 201 and the lower pad 101 through the upper water inlet 202 and the lower water inlet 102 respectively, so that the surface of the upper pad 201 and the lower pad 101 used to press and bond the battery cell 3 reaches and stabilizes at the set process temperature in advance.

[0082] During the process of the high-temperature battery cell 3 being squeezed by the upper adhesive pad 201 and the lower adhesive pad 101 and finally completely adhering to the surfaces of the upper adhesive pad 201 and the lower adhesive pad 101, the coolant in the temperature control channel 5 will absorb the heat of the battery cell 3.

[0083] To ensure that the temperature of the coolant in the temperature-controlled flow channel 5 is maintained at the set process temperature, the cooling circulation unit extracts the coolant from the flow channel 5 through the lower outlet 103 and the upper outlet 203 for cooling, and simultaneously injects the previously cooled coolant, which is maintained at the set process temperature, into the temperature-controlled flow channel 5 through the lower inlet 102 and the upper inlet 202. This achieves stable temperature control of the coolant in the temperature-controlled flow channel 5, allowing the heat from the battery cell 3 to be continuously, efficiently, and stably absorbed by the coolant, effectively avoiding thermal damage to the battery cell 3 caused by uneven heat absorption.

[0084] like Figure 3 and Figure 4 As shown, preferably, in this embodiment of the application, both the lower adhesive pad 101 and the upper adhesive pad 201 are integrally molded parts.

[0085] It is understood that the integrally molded upper gasket 201 and lower gasket 101 have more reliable sealing performance and are easier to process. In the embodiments of this application, in order to flexibly extrude the battery cell (refer to...) on the upper gasket 201 and lower gasket 101... Figure 3 While maintaining the inverted shape of the battery cell 3 (as shown), the upper adhesive pad 201 and the lower adhesive pad 101 are not only flexible but also have a certain degree of support. That is, in this embodiment, when the upper adhesive pad 201 and the lower adhesive pad 101 are integrally molded parts, the silicone material used for both has both elasticity and a certain degree of hardness, so that when the battery cell is clamped and shaped, it can keep the battery cell in an inverted shaped state to a certain extent.

[0086] The hardness of silicone is usually expressed in Shore A. In this application, there is no restriction on the Shore A value of the silicone used in the upper adhesive pad 201 and the lower adhesive pad 101. It is only required that the hardness of the silicone meets the aforementioned requirement of having a certain degree of hardness and elasticity and being able to meet the corresponding requirements for extrusion and leveling of the battery cells.

[0087] Return to reference Figure 1 As shown in the embodiment of this application, the lower pad 1 may further include a lower base 104 and a plurality of lower rubber pads 101. The lower base 104 extends along direction A, and the plurality of lower rubber pads 101 are fixedly mounted on the lower base 104 along direction A.

[0088] Correspondingly, in this embodiment of the application, the upper pad 2 may further include an upper base 204 and a plurality of upper adhesive pads 201. The upper base 204 extends along direction A, and the plurality of upper adhesive pads 201 are fixedly mounted on the upper base 204 along direction A.

[0089] Furthermore, multiple upper adhesive pads 201 and multiple lower adhesive pads 101 are set one-to-one.

[0090] It is understandable that, based on the multiple upper adhesive pads 201 and lower adhesive pads 101 provided by the battery cell leveling device, multiple battery cells 3 can be placed on the lower pad 1 at the same time, thereby enabling multiple battery cells 3 to be slowly squeezed and leveled at the same time, improving the efficiency of leveling the battery cells 3.

[0091] like Figures 1 to 4 As shown, preferably, in this embodiment of the application, the temperature of the circulating medium in the temperature control channels 5 of the plurality of upper adhesive pads 201 and the temperature control channels 5 of the plurality of lower adhesive pads 101 is the same.

[0092] Specifically, the temperature control channels 5 of the upper rubber pad 201 and the lower rubber pad 101 are connected to the same cooling circulation unit, so that the temperature of the circulating medium in the temperature control channel 5 of the upper pad 2 is the same as that in the temperature control channels 5 of the multiple lower pads 1.

[0093] By using the same cooling circulation unit to control the temperature of the circulating medium in the upper rubber pad 201 and the lower rubber pad 101, on the one hand, it can effectively ensure the temperature consistency of the circulating medium in the upper rubber pad 201 and the lower rubber pad 101, avoiding thermal damage caused by uneven heating on both sides of the battery cell. On the other hand, it is easier to achieve synchronous injection and discharge control of the circulating medium in the temperature control channel 5 in the upper rubber pad 201 and the lower rubber pad 101, that is, to achieve consistent control of cooling start and stop.

[0094] refer to Figure 2 , Figure 5 and Figure 6 ,in, Figure 5 This is a schematic diagram showing the shape of the battery cell 3 after the adsorption component is activated in an embodiment of this application. Figure 6 This is a three-dimensional structural cross-sectional view of the adsorption component in the embodiments of this application.

[0095] like Figure 2 As shown in the embodiment of this application, the battery cell leveling device may further include an adsorption component 105. The adsorption component 105 is fixedly installed on the lower base 104 and is respectively disposed on opposite sides of the lower rubber pad 101, for connecting to an external vacuum system and adsorbing and fixing the battery cells 3.

[0096] When the adsorption component 105 is not activated, when the bent and hot battery cell 3 to be leveled is placed on the lower pad 1, the first step is to place the two flat sides of the battery cell 3 on the adsorption components 105 on both sides of the lower pad 101.

[0097] like Figure 5As shown, since the battery cell 3 itself has a certain degree of flexibility, when the adsorption component 105 adsorbs and fixes the flat side of the battery cell 3, the battery cell 3 will undergo slight deformation, thereby enabling the battery cell 3 to be reliably adsorbed and fixed by the adsorption component 105, so as to ensure that the battery cell 3 can be accurately positioned in the subsequent leveling process.

[0098] In this embodiment, the adsorption assembly 105 may include a buffer pad 1051. The buffer pad 1051 is used for flexible contact with the battery cell 3. When the two flat sides of the battery cell 3 are placed on the adsorption assembly 105 on both sides of the lower adhesive pad 101, the flat sides of the battery cell 3 contact the buffer pad 1051.

[0099] This application does not limit the material of the cushioning pad 1051. For example, the cushioning pad 1051 may be made of silicone or polyurethane material.

[0100] like Figure 5 and Figure 6 As shown in the embodiments of this application, the adsorption component 105 may further include a suction nozzle 1052 and a connector 1053.

[0101] One end of the suction nozzle 1052 is fixedly installed on the lower base 104, and the other end is the adsorption surface 1054. The suction nozzle 1052 extends along the B direction and is disposed on one side of the lower rubber pad 101. The suction nozzle 1052 has a cavity 1055 inside.

[0102] The buffer pad 1051 is fixedly installed on the adsorption surface 1054, and the buffer pad 1051 is provided with a suction nozzle 1056, which is connected to the cavity 1055.

[0103] The connector 1053 is directly or indirectly connected to the cavity 1055 for connection to an external vacuum system.

[0104] When the external vacuum system evacuates the air in the cavity 1055, the air enters the cavity 1055 from the outside through the suction port 1056, and then is discharged to the external vacuum system through the connector 1053. Under the action of airflow and air pressure, the edge part corresponding to the flat side of the battery cell 3 is adsorbed onto the buffer pad 1051. The buffer pad 1051 is squeezed and slightly deformed. The buffering effect of the buffer pad 1051 is used to avoid the edge part of the battery cell 3 from making hard contact with the suction port 1052, thereby avoiding damage to the structure of the battery cell 3 caused by hard contact, especially avoiding damage to the electrode structure of the battery cell 3.

[0105] At the same time, the edge corresponding to the flat side of the battery cell 3 will also undergo slight deformation under the suction effect of the nozzle 1056, from Figure 2 The suspended state shown becomes Figure 5 The state of the attached cushioning pad 1051 is shown.

[0106] In this embodiment, the battery cell 3 is fixed by adsorption through the cooperation of an external vacuum system and an adsorption component 105. Before leveling the battery cell 3, it can be stably and securely fixed above the lower adhesive pad 101 without slippage. This ensures that the battery cell 3 will not move as the upper adhesive pad 201 moves downward and gradually increases its contact area with the battery cell 3, thus ensuring that the leveling work can be carried out smoothly.

[0107] In this embodiment of the application, the adsorption component 105 may further include a gas supply pipe 1057. The gas supply pipe 1057 is disposed in the lower base 104 and extends along the B direction. One end of the gas supply pipe 1057 is connected to the connector 1053. The interior of the gas supply pipe 1057 is in communication with the cavity 1055. The diameter of the gas supply pipe 1057 is adapted to the diameter of the cavity 1055.

[0108] At this time, the cavity 1055 is indirectly connected to the external vacuum system through the gas supply pipe 1057. Specifically, each suction port 1056 corresponds to a cavity 1055. The cavity 1055 is connected to the gas supply pipe 1057, and the gas supply pipe 1057 is connected to the external vacuum system, so that the suction port 1056 can adsorb, fix and release the battery cell 3.

[0109] In this embodiment, the diameter of the gas supply pipe 1057 can be equal to or slightly larger than the diameter of the cavity 1055. Because the diameter of the gas supply pipe 1057 is small, meaning the internal space of the gas supply pipe 1057 is small, the interior of the gas supply pipe 1057 can be quickly filled with compressed air. This compressed air is then delivered to the external vacuum system more rapidly, thereby achieving rapid adsorption of the battery cell 3. Correspondingly, when the external vacuum system stops pumping air and begins supplying air to the cavity 1055, rapid release of the battery cell 3 can be achieved.

[0110] In this embodiment, the external vacuum system can be a vacuum system with bidirectional gas transmission or pressure relief function. When the external vacuum system has bidirectional gas transmission function, when releasing the battery cell 3, air can be actively introduced into the cavity 1055 to release the adsorption and fixation of the edge part of the battery cell 3. When the external vacuum system has pressure relief function, external air is usually automatically injected into the cavity 1055 through a structure such as a venting valve, thereby removing the adsorption and fixation of the edge part of the battery cell 3.

[0111] In the embodiments of this application, the gas supply pipes 1057 of different adsorption components 105 may or may not be connected to each other, and this application does not impose any restrictions on this.

[0112] refer to Figure 7 , Figure 7 This is a schematic diagram of the structure of the adsorption component 105 in an embodiment of this application.

[0113] like Figure 7 As shown, in some other embodiments of this application, the connector 1053 is mounted on the nozzle 1052 and communicates with the cavity inside the nozzle 1052.

[0114] At this time, the number of cavities inside the suction nozzle 1052 can be one, and one cavity can simultaneously connect with multiple suction nozzle openings (see reference). Figure 6 The suction nozzle 1052 is connected to the suction nozzle 1056; the number of cavities inside the suction nozzle 1052 can also be multiple, each cavity is connected to a suction nozzle, and different cavities are interconnected.

[0115] Since the cavity is directly connected to the external vacuum system, when the adsorption capacity of the adsorption component 105 is malfunctioning, after ruling out problems with the external vacuum system, only the nozzle 1052 and the connector 1053 need to be inspected and repaired. For example, the airtightness of the nozzle 1052 can be checked, and whether there are any leaks at the connection between the connector 1053 and the nozzle 1052 can be checked. This has the advantages of simple structure and easy maintenance and replacement.

[0116] Preferably, in this embodiment of the application, the external vacuum system connected to the different adsorption components 105 is the same, which can realize the adsorption of the battery cell (reference) Figure 5 The batch synchronous adsorption and fixation of the battery cells (3) and the batch synchronous release, combined with the robotic arm for batch placement and gripping, can effectively improve the leveling efficiency of the battery cells.

[0117] like Figures 1 to 7 As shown in the summary, the battery cell leveling device provided in this application, through the upper adhesive pad 201 and lower adhesive pad 101 with flexible layer 4, transforms point / line pressure into uniformly distributed surface pressure during the extrusion shaping process, achieving continuous and gentle flattening of the battery cell 3 over a large area. This effectively overcomes the problem of local stress concentration caused by traditional mechanical lifting methods, preventing the battery cell 3 from developing hidden cracks or breaking. By integrating temperature control channels 5 within the upper adhesive pad 201 and lower adhesive pad 101, and using circulating media to perform simultaneous active cooling of the battery cell 3 on both sides, this method has higher heat conduction efficiency and temperature uniformity compared to traditional air-blowing cooling methods. It can quickly eliminate residual heat from welding and prevent thermal damage caused by temperature gradients. Therefore, while flexibly leveling the battery cell 3, it can improve heat dissipation efficiency and temperature uniformity, effectively reducing the risk of mechanical and thermal damage to the battery cell 3, thereby ensuring the flatness of the battery cell 3 and the yield of the finished product.

[0118] The specific embodiments described above illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details have been omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0119] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0120] In the embodiments of this application, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0121] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0122] In the description of this application, it should be noted that the terms "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and 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. Therefore, they should not be construed as limitations on this application.

[0123] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "fit" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0124] 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 leveling device, characterized in that, include: The lower pad (1) includes a lower rubber pad (101). The upper pad (2) is disposed opposite to the lower pad (1) and includes an upper adhesive pad (201). A flexible layer (4) is disposed on the side surface of the lower adhesive pad (101) facing the upper adhesive pad (201) and on the side surface of the upper adhesive pad (201) facing the lower adhesive pad (101); The lower rubber pad (101) and / or the upper rubber pad (201) are provided with a temperature control channel (5), which is used to contain the circulating medium.

2. The battery cell leveling device according to claim 1, characterized in that, The side of the lower rubber pad (101) facing the upper rubber pad (201) has a concave structure, and the side of the upper rubber pad (201) facing the lower rubber pad (101) has a convex structure, and the convex structure is adapted to the concave structure.

3. The battery cell leveling device according to claim 2, characterized in that, The lower pad (1) also includes: The lower water inlet (102) is set on the lower rubber pad (101) and communicates with the temperature control flow channel (5) in the lower rubber pad (101), and is used to connect to the circulating water outlet of the external cooling circulation unit. The lower outlet (103) is located on the lower rubber pad (101) and communicates with the temperature control channel (5) inside the lower rubber pad (101), and is used to connect to the circulating water inlet of the external cooling circulation unit.

4. The battery cell leveling device according to claim 3, characterized in that, The upper platform (2) also includes: The upper water inlet (202) is set on the upper rubber pad (201) and communicates with the temperature control channel (5) in the upper rubber pad (201) for connecting to the circulating water outlet of the external cooling circulation unit; The upper water outlet (203) is set on the upper rubber pad (201) and communicates with the temperature control flow channel (5) in the upper rubber pad (201), and is used to connect to the circulating water inlet of the external cooling circulation unit.

5. The battery cell leveling device according to claim 4, characterized in that, The lower pad (1) also includes: The lower base (104) extends along the first direction; A plurality of the lower rubber pads (101) are fixedly mounted on the lower base (104) along the first direction; The upper platform (2) also includes: Upper base (204) extending along the first direction; Multiple upper adhesive pads (201) are fixedly installed on the upper base (204) along the first direction, and the multiple upper adhesive pads (201) and the multiple lower adhesive pads (101) are arranged in a one-to-one correspondence; Preferably, the temperature of the circulating medium in the temperature control channels (5) of the plurality of upper rubber pads (201) is the same as that in the temperature control channels (5) of the plurality of lower rubber pads (101).

6. The battery cell leveling device according to any one of claims 1-5, characterized in that, Both the lower rubber pad (101) and the upper rubber pad (201) are integrally molded parts.

7. The battery cell leveling device according to claim 5, characterized in that, Also includes: Adsorption component (105) is fixedly installed on the lower base (104) and is respectively located on the opposite sides of the lower rubber pad (101) for connecting with the external vacuum system and adsorbing and fixing the battery cell (3).

8. The battery cell leveling device according to claim 7, characterized in that, The adsorption assembly (105) includes a buffer pad (1051) for flexible contact with the battery cell (3).

9. The battery cell leveling device according to claim 8, characterized in that, The adsorption component (105) further includes: The suction nozzle (1052) is fixedly mounted on the lower base (104) at one end and is an adsorption surface (1054) at the other end. The suction nozzle (1052) extends along the second direction and is disposed on one side of the lower rubber pad (101). The second direction is perpendicular to the first direction. The suction nozzle (1052) has a cavity (1055) inside. The buffer pad (1051) is fixedly installed on the adsorption surface (1054), and the buffer pad (1051) is provided with a suction nozzle (1056), which is connected to the cavity (1055). The connector (1053) is directly or indirectly connected to the cavity (1055) for connection to an external vacuum system.

10. The battery cell leveling device according to claim 9, characterized in that, The adsorption component (105) further includes: An air supply pipe (1057) is disposed inside the lower base (104) and extends along the second direction. One end of the air supply pipe (1057) is connected to the connector (1053). The interior of the air supply pipe (1057) communicates with the cavity (1055). The diameter of the air supply pipe (1057) is adapted to the diameter of the cavity (1055).

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