A cell connection assembly, a battery pack, a vehicle and a processing method

Abstract

The application belongs to the technical field of battery packs, and particularly relates to a battery cell connecting assembly, a battery pack, a vehicle and a processing method. The battery cell connecting assembly comprises a base film, a pole connecting piece and a sampling piece. The base film comprises a first avoiding hole, a first sticking part and a second sticking part, and the first sticking part is arranged at least partially around the first avoiding hole. The pole connecting piece is arranged at the first avoiding hole and is stuck to the first sticking part. The sampling piece is stuck to the second sticking part and is connected to the pole connecting piece. Compared with a hot-pressing connecting mode, the sticking connecting mode is lower in cost and more convenient in processing. Therefore, the battery cell connecting assembly adopts the sticking mode to connect the sampling piece, the pole connecting piece and the base film, so that the process cost of the battery cell connecting assembly can be reduced, and the processing cycle of the battery cell connecting assembly can be shortened.

Description

Technical Field

[0001] This application belongs to the field of battery pack technology, specifically relating to a cell connection assembly, a battery pack, a vehicle, and a processing method. Background Technology

[0002] CCS (Cells Contact System) is a key component in power batteries that connects multiple independent cells and integrates them into a battery module. CCS mainly consists of terminal connectors for connecting the cell terminals, sampling components for sampling the cells (such as temperature and voltage), and a base film. During assembly, the terminal connectors and sampling components are hot-pressed onto the base film. However, hot-pressing is a relatively expensive process with a long production cycle, which is detrimental to optimizing battery pack production costs and efficiency. Summary of the Invention

[0003] In view of the above problems, the present invention is proposed to provide a cell connection assembly, battery pack, vehicle, and processing method that overcomes or at least partially solves the above problems.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, embodiments of this application provide a battery cell connection assembly, including: The base film includes a first clearance hole, a first adhesive portion and a second adhesive portion, wherein the first adhesive portion is at least partially disposed around the first clearance hole, and the second adhesive portion is disposed adjacent to the first adhesive portion; A pole connector, wherein the pole connector is disposed at the first clearance hole and is attached to the first adhesive part; The sampling component is attached to the second adhesive part and connected to the pole connector.

[0005] Optionally, the first adhesive portion includes an extension portion, and the sampling end of the sampling member is connected to the side of the pole connector facing the extension portion.

[0006] Optionally, the base film includes a cut portion that extends through the base film and is located on the side of the first adhesive portion facing the second adhesive portion.

[0007] Optionally, the base film includes a first positioning hole located at the first adhesive portion, and the first positioning hole is positioned and engaged with the pole connector.

[0008] Optionally, the base film includes a second positioning hole, which is disposed adjacent to the second adhesive portion and is positioned and engaged with the sampling element.

[0009] Optionally, the base film includes a second clearance hole for avoiding structural components of the battery pack, and / or the second clearance hole for avoiding the terminal connector.

[0010] Secondly, embodiments of this application provide a battery pack, the battery pack including any of the cell connection components described in the first aspect.

[0011] Thirdly, embodiments of this application provide a vehicle that includes any of the battery packs described in the second aspect.

[0012] Fourthly, embodiments of this application provide a processing method, comprising the following steps: Prepare the base film to be bonded, the electrode connector and the sampling piece; The base film, the electrode connector, and the sampling component are attached by adhesive.

[0013] Optionally, the preparation of the base film to be pasted, the electrode connector, and the sampling component includes: The base film is formed by die-cutting. A first adhesive portion and a second adhesive portion are prepared on the base film by roller imprinting; wherein, the first adhesive portion is used to adhere to the pole connector, and the second adhesive portion is used to adhere to the sampling component.

[0014] Optionally, the preparation of the base film to be pasted, the electrode connector, and the sampling component includes: After the first adhesive portion and the second adhesive portion are prepared on the base film by roller imprinting, the positioning portion of the base film used to position the roller is cut off.

[0015] Optionally, the preparation of the base film to be pasted, the electrode connector, and the sampling component includes: The pole connector and the sampling component are connected by welding.

[0016] Optionally, the processing method further includes: After attaching the base film, the electrode connector, and the sampling component, attach the auxiliary materials and inspect the final product.

[0017] In the embodiments described in this application, the cell connection assembly includes a base film, an electrode connector, and a sampling component. The base film has a first clearance hole, a first adhesive portion, and a second adhesive portion. The electrode connector is disposed at the first clearance hole and adhered to the first adhesive portion surrounding the first adhesive portion. With the first adhesive portion adhered, the electrode connector can be stably held at the first clearance hole, so as to connect to the electrode of the cell through the first clearance hole. The sampling component is adhered to the second adhesive portion and connected to the electrode connector. With the second adhesive portion adhered, the sampling component can be stably held at a position adjacent to the electrode connector, so as to perform sampling operations such as voltage sampling and temperature sampling on the electrode connector. Compared with the hot-pressing connection method, the adhesive connection method is lower in cost and more convenient to process. Therefore, the cell connection assembly described in this application uses an adhesive method to connect the sampling component, the electrode connector, and the base film, which can reduce the process cost of the cell connection assembly and shorten the processing cycle of the cell connection assembly. By using the cell connection assembly described in the embodiments of this application, the production cost of the battery pack can be reduced and the production efficiency of the battery pack can be improved, thereby optimizing the final vehicle's processing cost and production cycle.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the cell connection assembly described in some embodiments of this application; Figure 2 yes Figure 1 Schematic diagram of the base membrane structure; Figure 3 This is a schematic diagram of the structure of the battery pack described in some embodiments of this application; Figure 4 This is a schematic flowchart of the processing method described in some embodiments of this application; Reference numerals: 1. Cell connection assembly; 11. Base film; 111. First clearance hole; 112. First adhesive part; 1121. Extension part; 113. Second adhesive part; 114. Cutting part; 115. First positioning hole; 116. Second positioning hole; 117. Second clearance hole; 12. Terminal post connector; 13. Sampling component; 2. Top cover; 3. Cell assembly; 4. Housing. Detailed Implementation

[0020] Embodiments of the present invention will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0021] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 invention.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] CCS (Cells Contact System) is a key component in power batteries that connects multiple independent cells and integrates them into a battery module. Typically, a CCS mainly consists of terminal connectors, sampling components, and a base film. Terminal connectors connect to the terminals of the cells to achieve series and parallel connections. Sampling components are usually connected to the terminal connectors and electrically connected to the battery pack's BMS (Battery Management System). The sampling components can sample data such as cell temperature and voltage and feed this data back to the BMS to help it monitor and manage each cell. The base film is the structural component that supports the terminal connectors and sampling components. During assembly, the terminal connectors and sampling components are assembled onto the base film using a hot-pressing method. During assembly, the terminal connectors and sampling components need to be precisely aligned with their mounting positions on the base film before being fed into a hot press for hot pressing. Before hot pressing, the temperature of the hot pressing plate needs to be raised using a heating device. Then, a cylinder or other driving component applies pressure to the hot pressing plate onto the electrode connector and sampling component. After pressing, the electrode connector, sampling component, and base film undergo pressure holding and cooling to ensure that the electrode connector and sampling component are stably fixed to the base film. It is clear that hot pressing has relatively high process costs and a long production cycle. Using hot pressing to assemble the electrode connector, sampling component, and base film is not conducive to reducing the process cost of CCS, nor is it conducive to improving the processing efficiency or shortening the production cycle of CCS.

[0025] refer to Figure 1 To address the aforementioned issues, embodiments of this application provide a cell connection assembly, a battery pack, a vehicle, and a processing method.

[0026] Example 1: refer to Figure 1 The battery cell connection assembly 1 described in Embodiment 1 of this application includes a base film 11, an electrode connector 12, and a sampling component 13. The base film 11 is the basic structural component used to support the electrode connector 12 and the sampling component 13. Specifically, the base film 11 can be a flexible film made of materials such as PET (Polyethylene terephthalate) to give it good deformation capability, insulation performance, and strength. Before assembly, the base film 11 can be cut into the required shape by die-cutting or other methods to facilitate assembly with the electrode connector 12 and the sampling component 13.

[0027] refer to Figure 2The base film 11 includes a first clearance hole 111, which is used to connect the electrode connector 12 to the battery cell electrode. In other words, during use, the base film 11 covers the side of the battery cell with the electrode, and the electrode connector 12 is located on the side of the base film 11 facing away from the battery cell. The electrode connector 12 and the electrode pass through the first clearance hole 111 and are connected by welding or other means to achieve the connection between adjacent battery cells. At least a portion of the first adhesive part 112 is provided around the first clearance hole 111. The first adhesive part 112 is the part of the base film 11 covered with adhesives such as cold-press adhesive, UV-curable adhesive, and low-temperature heat-sensitive adhesive. The electrode connector 12 can be directly bonded to the first adhesive part 112 to achieve a fixed connection between the electrode connector 12 and the base film 11. The first adhesive portion 112 is arranged around the first clearance hole 111, which increases the bonding area between the electrode connector 12 and the base film 11, thus ensuring a stable bond between them and improving the connection strength. The second adhesive portion 113 is arranged adjacent to the first adhesive portion 112. The second adhesive portion 113 is also a portion of the base film 11 covered with adhesives such as cold-press adhesive, UV-curable adhesive, or low-temperature thermosensitive adhesive. The sampling component 13 can be directly bonded to the second adhesive portion 113 to achieve a fixed connection between the sampling component 13 and the base film 11. Since the second adhesive portion 113 is adjacent to the first adhesive portion 112, the sampling component 13 and the electrode connector 12 can also be arranged adjacent to each other to facilitate connection.

[0028] The number of the first adhesive portion 112 and the second adhesive portion 113 can be set according to actual needs. For example, the number of the first adhesive portion 112 can be one, that is, the first adhesive portion 112 on the base film 11 can be bonded to all the terminal connectors 12 at the same time. The number of the first adhesive portion 112 can also be two, three, four or even more. Preferably, the number of the first adhesive portion 112 matches the number of terminal connectors 12. In this case, part of the first adhesive portion 112 can be arranged around two first clearance holes 111, and the two first clearance holes 111 around the same first adhesive portion 112 correspond to the positive terminal and negative terminal of the same battery cell, respectively. Parts of the two terminal connectors 12 can be bonded to the same first adhesive portion 112 and pass through a first clearance hole 111 to connect to the terminal of the battery cell. Similarly, the number of second adhesive portions 113 can be set according to actual needs. For example, there can be one second adhesive portion 113, meaning that the second adhesive portion 113 on the base film 11 can be bonded to all sampling components 13. Alternatively, there can be two, three, four, or even more second adhesive portions 113, in which case any second adhesive portion 113 is connected to a portion of the sampling component 13. When there are more than one first adhesive portion 112 and one second adhesive portion 113, at least one first adhesive portion 112 and at least one second adhesive portion 113 are arranged adjacent to each other.

[0029] refer to Figure 1 The terminal connector 12 is a connection structure used to connect the battery cell terminals. It can be a sheet-like structure made of conductive materials such as copper or aluminum. The terminal connector 12 can connect the terminals of adjacent battery cells, so that the battery cells are connected in series and parallel as a whole. For example, for two adjacent battery cells, the terminal connector 12 can connect the positive terminal of one battery cell to the negative terminal of the other battery cell. In the embodiments described in this application, the specific shape of the terminal connector 12 can be set according to actual needs. For example, the terminal connector 12 may include two flat plate-like structures and an arched structure connected between the two flat plate-like structures. The flat plate-like structures are used for welding to the battery cell terminals, and the arched structure is used to deform after the battery cell expands, so that the terminal connector 12 can adapt to the displacement of the battery cell terminals after the battery cell expands.

[0030] refer to Figure 1 The sampling component 13 is specifically a structure used to perform sampling operations such as cell temperature sampling and cell voltage sampling. In some embodiments of this application, the sampling component 13 can be an FPC (Flexible Printed Circuit), which is a flexible circuit board made by etching copper foil circuits onto a flexible substrate (such as a polyimide substrate or polyester film). FPCs are flexible and thin, and can realize complex circuit designs and multi-layer structures, which can fully meet the needs of sampling operations such as voltage sampling and temperature sampling. The sampling component 13 can also be an FDC (Flexible Die-cutting Circuit), which is a flexible circuit board with PI or PET film and copper foil as substrates, and the circuit is formed by die-cutting. The sampling component 13 can also be an FFC (Flexible Flat Cable), which is a new type of data cable made by pressing PET insulation material and extremely thin tin-plated flat copper wire together. Sampling component 13 can also be an FCC (Flexible flat cable connect flexible die-cut circuit), which is a new type of signal acquisition component that uses FCC to graft FPC or FDC. Sampling component 13 can also be a common sampling harness or a common printed circuit board, which will not be listed in detail here.

[0031] With the first adhesive part 112 attached, the terminal connector 12 can be stably held at the first clearance hole 111, so as to connect with the terminal of the battery cell through the first clearance hole 111. The sampling member 13 is attached to the second adhesive part 113 and connected to the terminal connector 12. With the second adhesive part 113 attached, the sampling member 13 can be stably held at a position adjacent to the terminal connector 12, so as to complete sampling operations such as voltage sampling and temperature sampling of the terminal connector 12. Compared with the hot-pressing connection method, the adhesive connection method is lower in cost and more convenient to process. Therefore, the battery cell connection assembly 1 described in this application uses the adhesive method to connect the sampling member 13, the terminal connector 12 and the base film 11, which can reduce the process cost of the battery cell connection assembly 1 and shorten the processing cycle of the battery cell connection assembly 1. Using the battery cell connection assembly 1 described in the embodiments of this application can reduce the production cost of the battery pack and improve the production efficiency of the battery pack, thereby optimizing the final vehicle processing cost and production cycle.

[0032] Example 2: Embodiment 2 of this application is a further improvement based on Embodiment 1. Compared to Embodiment 1, the cell connection assembly 1 in Embodiment 2 of this application also includes a base film 11, an electrode connector 12, and a sampling component 13. Embodiment 2 of this application further improves the base film 11.

[0033] refer to Figure 2 Optionally, in Embodiment 2 of this application, the first adhesive portion 112 includes an extension portion 1121. The extension portion 1121 is a part of the first adhesive portion 112, and its shape and size can be set according to actual needs. For example, the main body of the first adhesive portion 112 can be an annular portion surrounding the first clearance hole 111, and the extension portion 1121 is a rectangular area extending from the main body of the first adhesive portion 112 toward the second adhesive portion 113. The sampling end of the sampling member 13 is connected to the side of the pole connector 12 facing the extension portion 1121 by welding or other means. In this way, after the sampling member 13 is pasted at the first adhesive portion 112, the sampling end of the sampling member 13 can be sandwiched between the pole connector 12 and the extension portion 1121. The mutual adhesive portion between the pole connector 12 and the extension portion 1121 can ensure that the sampling end of the sampling member 13 is not exposed, that is, to protect the sampling end of the sampling member 13.

[0034] Example 3: Embodiment 3 of this application is a further improvement based on any one of the embodiments in Embodiments 1-2. Compared with Embodiment 2, the cell connection assembly 1 in Embodiment 3 of this application also includes a base film 11, an electrode connector 12, and a sampling member 13, and the first adhesive portion 112 of the base film 11 also has an extension portion 1121. Embodiment 3 of this application further improves the base film 11.

[0035] refer to Figure 2 Optionally, in Embodiment 3 of this application, the base film 11 includes a cut portion 114. Specifically, the cut portion 114 is a slit on the base film 11 that penetrates the base film 11 and is disposed on the side of the first adhesive portion 112 facing the second adhesive portion 113. With long-term cycling of the battery cell, the battery cell itself will expand. The expansion of the battery cell will cause a change in the relative position between the battery cell terminal and the sampling member 13. At this time, the base film 11 can deform at the cut point to adapt to the effects of the battery cell expansion. This helps to avoid damage to the battery cell connection assembly 1 due to the battery cell expansion, thus helping to ensure the normal operation of the battery pack during long-term cycling, that is, helping to ensure the long-term cycle life of the battery pack.

[0036] Example 4: Embodiment 4 of this application is a further improvement based on any of the embodiments in Embodiments 1-3. Compared with Embodiments 1-3, the cell connection assembly 1 in Embodiment 4 of this application also includes a base film 11, an electrode connector 12, and a sampling component 13. Embodiment 4 of this application further improves the base film 11.

[0037] refer to Figure 2 Optionally, in Embodiment 4 of this application, the base film 11 includes a first positioning hole 115. The first positioning hole 115 is a positioning structure that can be positioned and engaged with the electrode connector 12. It is located at the first adhesive portion 112, and its size and shape can be specifically designed according to actual needs. The electrode connector 12 can be provided with a positioning protrusion that engages with the first positioning hole 115. When the electrode connector 12 is bonded to the first adhesive portion 112, the positioning protrusion on the electrode connector 12 can engage with the first positioning hole 115 to prevent the electrode connector 12 from being misaligned. In other words, providing the first positioning hole 115 at the first adhesive portion 112 helps to ensure the positional accuracy of the electrode connector 12 during bonding, thereby ensuring the yield of the cell connection assembly 1.

[0038] Example 5: Embodiment 5 of this application is a further improvement based on any of the embodiments in Embodiments 1-4. Compared with Embodiments 1-4, the cell connection assembly 1 in Embodiment 5 of this application also includes a base film 11, an electrode connector 12, and a sampling component 13. Embodiment 5 of this application further improves the base film 11.

[0039] refer to Figure 2Optionally, in embodiment 5 of this application, the base film 11 includes a second positioning hole 116. The second positioning hole 116 is a positioning structure that can be positioned and engaged with the sampling member 13. It is located adjacent to the second adhesive portion 113, and its size and shape can be specifically designed according to actual needs. The sampling member 13 can be provided with a positioning protrusion that is positioned and engaged with the second positioning hole 116. When the sampling member 13 is bonded to the second adhesive portion 113, the positioning protrusion on the sampling member 13 can be engaged with the second positioning hole 116 through insertion to achieve positioning and engagement, thereby preventing the electrode connector 12 from being misaligned. In other words, providing the second positioning hole 116 adjacent to the second adhesive portion 113 is beneficial to ensuring the positional accuracy of the sampling member 13 during bonding, thereby ensuring the yield of the cell connection assembly 1. It should be noted that in other embodiments of this application, the sampling member 13 and the base film 11 can also achieve positioning and engagement in other ways. For example, positioning protrusions can be provided on the base film 11, and the positioning protrusions are arranged around the sampling member 13. When installing the sampling component 13, the edge of the sampling component 13 can contact the surface of the positioning protrusion so that the sampling component 13 can be snapped into the positioning space formed by the positioning protrusion. In other words, in other embodiments of this application, there are multiple options for the positioning and engagement method between the sampling component 13 and the base film 11, and it is not limited to the positioning method described in this embodiment, which involves the positioning protrusion and the second positioning hole 116 engaging and snapping together.

[0040] Example 6: Embodiment 6 of this application is a further improvement based on any of the embodiments 1-5. Compared with embodiments 1-5, the cell connection assembly 1 in embodiment 6 of this application also includes a base film 11, an electrode connector 12, and a sampling component 13. Embodiment 6 of this application further improves the base film 11.

[0041] refer to Figure 2 Optionally, in Embodiment 6 of this application, the base film 11 includes a second clearance hole 117. The second clearance hole 117 is used to avoid structural components of the battery pack, or the second clearance hole 117 is used to avoid the terminal connector 12. Two, three, four or even more second clearance holes 117 may be provided, with some of the second clearance holes 117 used to avoid structural components of the battery pack and the remaining second clearance holes 117 used to avoid the terminal connector 12.

[0042] Specifically, for example, in Embodiment 6 of this application, the first clearance holes 111 can be arranged in rows at intervals along a first direction, and four rows of first clearance holes 111 are arranged at intervals along a second direction. The first direction and the second direction are specifically two directions orthogonal to the surface of the base film 11, which can be specifically selected according to actual needs, and will not be elaborated here. Among the four rows of first clearance holes 111, two adjacent rows of first clearance holes 111 correspond to one column of battery cells, and the other two adjacent rows of first clearance holes 111 correspond to another column of battery cells. A plurality of second clearance holes 117 arranged along the first direction are provided between the two adjacent rows of first clearance holes 111 and the other two adjacent rows of first clearance holes 111. Correspondingly, the battery pack adapted to the battery cell connecting assembly 1 has a pressure strip, and a partition is provided between two columns of battery cells in the battery pack. After the battery cell connecting assembly 1 is connected to the battery cells, the pressure strip and the partition can be connected through the second clearance holes 117.

[0043] Along the aforementioned first direction, there may be a large gap between cells in the same row to accommodate structural components such as sleeves. Correspondingly, the base film 11 can be provided with a second clearance hole 117 at the corresponding gap to avoid structural components such as sleeves. In order to ensure the connection of cells in the same row, the terminal connector 12 spanning this gap will be designed to be relatively large. In order to prevent the arched part of the terminal connector 12 from interfering with the base film 11, a second clearance hole 117 can be provided on the base film 11 to avoid the arched part of the terminal connector 12.

[0044] Example 7: refer to Figure 3 Embodiment 7 of this application provides a battery pack. The battery pack of Embodiment 7 includes any of the cell connection components 1 described in Embodiments 1-6. Specifically, the battery pack may include a top cover 2, a housing 4, a cell assembly 3, and the cell connection component 1. The top cover 2 and the housing 4 form a receiving cavity for accommodating the cell assembly 3 and the cell connection component 1, and the cell connection component 1 is disposed on the side of the cell assembly 3 facing the top cover 2.

[0045] refer to Figure 1 The cell connection assembly 1 includes a base film 11, an electrode connector 12, and a sampling component 13. The base film 11 is the basic structural component that supports the electrode connector 12 and the sampling component 13. Specifically, the base film 11 can be a flexible film made of materials such as PET (Polyethylene terephthalate) to give it good deformation capability, insulation performance, and strength. Before assembly, the base film 11 can be cut into the required shape by die-cutting or other methods to facilitate assembly with the electrode connector 12 and the sampling component 13.

[0046] refer to Figure 2The base film 11 includes a first clearance hole 111, which is used to connect the electrode connector 12 to the battery cell electrode. In other words, during use, the base film 11 covers the side of the battery cell with the electrode, and the electrode connector 12 is located on the side of the base film 11 facing away from the battery cell. The electrode connector 12 and the electrode pass through the first clearance hole 111 and are connected by welding or other means to achieve the connection between adjacent battery cells. At least a portion of the first adhesive part 112 is provided around the first clearance hole 111. The first adhesive part 112 is the part of the base film 11 covered with adhesives such as cold-press adhesive, UV-curable adhesive, and low-temperature heat-sensitive adhesive. The electrode connector 12 can be directly bonded to the first adhesive part 112 to achieve a fixed connection between the electrode connector 12 and the base film 11. The first adhesive portion 112 is arranged around the first clearance hole 111, which increases the bonding area between the electrode connector 12 and the base film 11, thus ensuring a stable bond between them and improving the connection strength. The second adhesive portion 113 is arranged adjacent to the first adhesive portion 112. The second adhesive portion 113 is also a portion of the base film 11 covered with adhesives such as cold-press adhesive, UV-curable adhesive, or low-temperature thermosensitive adhesive. The sampling component 13 can be directly bonded to the second adhesive portion 113 to achieve a fixed connection between the sampling component 13 and the base film 11. Since the second adhesive portion 113 is adjacent to the first adhesive portion 112, the sampling component 13 and the electrode connector 12 can also be arranged adjacent to each other to facilitate connection.

[0047] refer to Figure 1 The terminal connector 12 is a connection structure used to connect the battery cell terminals. It can be a sheet-like structure made of conductive materials such as copper or aluminum. The terminal connector 12 can connect the terminals of adjacent battery cells, so that the battery cells are connected in series and parallel as a whole. For example, for two adjacent battery cells, the terminal connector 12 can connect the positive terminal of one battery cell to the negative terminal of the other battery cell. In the embodiments described in this application, the specific shape of the terminal connector 12 can be set according to actual needs. For example, the terminal connector 12 may include two flat plate-like structures and an arched structure connected between the two flat plate-like structures. The flat plate-like structures are used for welding to the battery cell terminals, and the arched structure is used to deform after the battery cell expands, so that the terminal connector 12 can adapt to the displacement of the battery cell terminals after the battery cell expands.

[0048] refer to Figure 1The sampling component 13 is specifically a structure used to perform sampling operations such as cell temperature sampling and cell voltage sampling. In some embodiments of this application, the sampling component 13 can be an FPC (Flexible Printed Circuit), which is a flexible circuit board made by etching copper foil circuits onto a flexible substrate (such as a polyimide substrate or polyester film). FPCs are flexible and thin, and can realize complex circuit designs and multi-layer structures, which can fully meet the needs of sampling operations such as voltage sampling and temperature sampling. The sampling component 13 can also be an FDC (Flexible Die-cutting Circuit), which is a flexible circuit board with PI or PET film and copper foil as substrates, and the circuit is formed by die-cutting. The sampling component 13 can also be an FFC (Flexible Flat Cable), which is a new type of data cable made by pressing PET insulation material and extremely thin tin-plated flat copper wire together. Sampling component 13 can also be an FCC (Flexible flat cable connect flexible die-cut circuit), which is a new type of signal acquisition component that uses FCC to graft FPC or FDC. Sampling component 13 can also be a common sampling harness or a common printed circuit board, which will not be listed in detail here.

[0049] With the first adhesive part 112 attached, the terminal connector 12 can be stably held at the first clearance hole 111, so as to connect with the terminal of the battery cell through the first clearance hole 111. The sampling member 13 is attached to the second adhesive part 113 and connected to the terminal connector 12. With the second adhesive part 113 attached, the sampling member 13 can be stably held at a position adjacent to the terminal connector 12, so as to complete sampling operations such as voltage sampling and temperature sampling of the terminal connector 12. Compared with the hot-pressing connection method, the adhesive connection method is lower in cost and more convenient to process. Therefore, the battery cell connection assembly 1 described in this application uses the adhesive method to connect the sampling member 13, the terminal connector 12 and the base film 11, which can reduce the process cost of the battery cell connection assembly 1 and shorten the processing cycle of the battery cell connection assembly 1. Using the battery cell connection assembly 1 described in the embodiment of this application can reduce the production cost of the battery pack and improve the production efficiency of the battery pack.

[0050] Example 8: Embodiment 8 of this application provides a battery pack. The vehicle described in Embodiment 8 includes the battery pack described in Embodiment 7. The battery pack can serve as a power source for the vehicle to ensure its normal operation.

[0051] For example, in Embodiment 8 of this application, the vehicle may include a small car, a medium-sized car, a sedan, a truck, a trailer, a CDV (Car Derived Van), an MPV (multi-Purpose Vehicle), an SUV (Sport Utility Vehicle), etc. The specific type of vehicle is not limited in this embodiment.

[0052] Using the aforementioned battery pack, with the first adhesive part 112 attached, the terminal connector 12 can be stably held at the first clearance hole 111, so as to connect to the terminal of the cell through the first clearance hole 111. The sampling member 13 is attached to the second adhesive part 113 and connected to the terminal connector 12. With the second adhesive part 113 attached, the sampling member 13 can be stably held at a position adjacent to the terminal connector 12, so as to complete sampling operations such as voltage sampling and temperature sampling of the terminal connector 12. Compared with the hot-pressing connection method, the adhesive connection method is lower in cost and more convenient to process. Therefore, the cell connection assembly 1 described in this application uses the adhesive method to connect the sampling member 13, the terminal connector 12 and the base film 11, which can reduce the process cost of the cell connection assembly 1 and shorten the processing cycle of the cell connection assembly 1. Using the cell connection assembly 1 described in the embodiments of this application can reduce the production cost of the battery pack and improve the production efficiency of the battery pack, thereby optimizing the final vehicle processing cost and production cycle.

[0053] Example 9: refer to Figure 4 Embodiment 9 of this application provides a processing method for processing the aforementioned cell connection assembly 1, and includes the following steps: S100: Prepare the base film 11 to be pasted, the pole connector 12 and the sampling piece 13; Specifically, in this process, the base film 11, the electrode connector 12, and the sampling component 13 can be finished products. At this point, the base film 11, the electrode connector 12, and the sampling component 13 can be transferred to the bonding station for further bonding and assembly. Alternatively, the base film 11, the electrode connector 12, and the sampling component 13 can be processed products obtained by further processing the raw materials or semi-finished products. That is, technicians prepare the required base film 11, electrode connector 12, and sampling component 13 based on the raw materials or semi-finished products through cutting, gluing, and other related processing techniques.

[0054] S200: The base film 11, the pole connector 12, and the sampling component 13 are attached by adhesive.

[0055] Specifically, in this process, adhesives such as cold-press adhesive, UV-curable adhesive, and low-temperature thermosensitive adhesive can be used to bond the electrode connector 12, sampling component 13, etc., to the base film 11. Compared with the hot-pressing connection method, the adhesive connection method is lower in cost and more convenient to process. Therefore, the processing method described in this application, which uses adhesive to connect the sampling component 13, electrode connector 12, and base film 11, can reduce the process cost of the cell connection assembly 1 and shorten the processing cycle of the cell connection assembly 1. By using the processing method described in the embodiments of this application, the production cost of the battery pack can be reduced and the production efficiency of the battery pack can be improved.

[0056] Example 10: Embodiment 10 of this application is a further improvement on Embodiment 9. Compared with Embodiment 9, Embodiment 10 of this application further improves step S100.

[0057] Optionally, in Embodiment 10 of this application, step S100: preparing the base film 11 to be pasted, the electrode connector 12, and the sampling component 13 includes: S101: The base film 11 is formed by die-cutting.

[0058] Specifically, a die-cutting process can be used to process the base film 11 of materials such as PET into the required size and shape. A first clearance hole 111 can be formed on the base film 11 using a die-cutting process so that the electrode connector 12 can be connected to the battery cell electrode.

[0059] S102: A first adhesive part 112 and a second adhesive part 113 are prepared on the base film 11 by roller imprinting; wherein, the first adhesive part 112 is used to be bonded to the pole connector 12, and the second adhesive part 113 is used to be bonded to the sampling piece 13.

[0060] Specifically, protrusions can be provided on corresponding areas of the roller, and cold-press adhesive, UV-curable adhesive, low-temperature heat-sensitive adhesive, or other adhesives can be applied to the protrusions. During adhesive application, simply rolling the roller on the surface of the base film 11 transfers the adhesive from the protrusions to the base film 11, forming the first adhesive portion 112 and the second adhesive portion 113 on the base film 11. The first adhesive portion 112 can be bonded and fixed to the electrode connector 12, and the second adhesive portion 113 can be bonded and fixed to the sampling component 13.

[0061] Using die-cutting to form the base film 11 helps ensure the shape and dimensional accuracy of the base film 11, thus helping to ensure the product yield. Using roller coating to form the first adhesive portion 112 and the second adhesive portion 113 of the base film 11 can improve the positional and dimensional accuracy of the first adhesive portion 112 and the second adhesive portion 113, and also improve the convenience of processing.

[0062] Example 11: Embodiment 11 of this application is a further improvement on Embodiment 10. Compared with Embodiment 10, Embodiment 11 of this application further improves step S100. In Embodiment 11 of this application, step S100: preparing the base film 11 to be pasted, the electrode connector 12, and the sampling member 13, includes: S103: After preparing the first adhesive portion 112 and the second adhesive portion 113 on the base film 11 by roller imprinting, the positioning portion of the base film 11 used for positioning rollers is cut off.

[0063] Specifically, during the forming of the base film 11, a portion of redundant area can be retained on the base film 11, and positioning structures such as positioning holes are formed in this area. Correspondingly, positioning protrusions that engage with the positioning holes can be provided on the adhesive application roller. Before adhesive application begins, the roller can be positioned and engaged with the base film 11 to ensure the positional and dimensional accuracy of the adhesive application. After adhesive application is completed, the redundant portion can be removed again through a die-cutting process to ensure the final shape and size of the base film 11.

[0064] Example 12: Embodiment 12 of this application is a further improvement based on any of the embodiments in Embodiments 9-11. Compared with Embodiments 9-11, Embodiment 11 of this application further improves step S100. In Embodiment 11 of this application, step S100: preparing the base film 11 to be pasted, the electrode connector 12, and the sampling member 13, includes: S104: Connect the pole connector 12 and the sampling component 13 by welding.

[0065] Specifically, the electrode connector 12 and sampling component 13 can be loaded into the welding station, and then the sampling end of the sampling component 13 can be welded to the electrode connector 12 using ultrasonic welding, laser welding, or other methods to ensure that the sampling component 13 can reliably collect voltage and temperature information from the battery cell. Before bonding the electrode connector 12 and sampling component 13, they can be connected by welding, allowing them to be integrally bonded to the base film 11. This saves the steps of adjusting and connecting the electrode connector 12 and sampling component 13 after bonding, thus improving the convenience of the processing technology.

[0066] Example 13: Embodiment 13 of this application is a further improvement based on any of the embodiments 9-12. Compared with embodiments 9-12, embodiment 13 of this application further includes: S300: After attaching the base film 11, electrode connector 12 and sampling component 13, attach the auxiliary materials and inspect the final product.

[0067] Specifically, after completing the base film 11, electrode connector 12, and sampling component 13, related auxiliary materials outside the base film 11, electrode connector 12, and sampling component 13 can be bonded to the base film 11 using an adhesive method. Using an adhesive method facilitates the assembly of auxiliary materials, thereby improving the processing convenience of the cell connection assembly 1 and reducing its processing cost. Inspecting the final product after assembly ensures the yield rate of the cell connection assembly 1 and prevents defective cell connection assemblies 1 from flowing to subsequent processes.

[0068] It should be noted that the cell connection assembly involved in the above embodiments can be implemented based on at least one of Embodiments 1 to 6. Specifically, for example, Embodiment 1 can be implemented as an independent embodiment, Embodiment 1+2 can be implemented as an independent embodiment, Embodiment 1+3 can be implemented as an independent embodiment, Embodiment 1+2+3 can be implemented as an independent embodiment, Embodiment 1+4 can be implemented as an independent embodiment, Embodiment 1+2+4 can be implemented as an independent embodiment, Embodiment 1+3+4 can be implemented as an independent embodiment, Embodiment 1+2+3+4 can be implemented as an independent embodiment. Embodiment 1+5 can be implemented as an independent embodiment, Embodiment 1+2+5 can be implemented as an independent embodiment, Embodiment 1+3+5 can be implemented as an independent embodiment, Embodiment 1+2+3+5 can be implemented as an independent embodiment, Embodiment 1+4+5 can be implemented as an independent embodiment, Embodiment 1+2+4+5 can be implemented as an independent embodiment, Embodiment 1+3+4+5 can be implemented as an independent embodiment, Embodiment 1+2+3+4+5 can be implemented as an independent embodiment. Examples 1 and 6 can be implemented as independent embodiments; Examples 1, 2, and 6 can be implemented as independent embodiments; Examples 1, 3, and 6 can be implemented as independent embodiments; Examples 1, 2, 3, and 6 can be implemented as independent embodiments; Examples 1, 4, and 6 can be implemented as independent embodiments; Examples 1, 2, 4, and 6 can be implemented as independent embodiments; Examples 1, 3, 4, and 6 can be implemented as independent embodiments; Examples 1, 2 ...

[0069] For embodiments of the battery pack and vehicle, they may include at least one combination of the above embodiments. That is, embodiments 7 and 8 can be developed based on any of the aforementioned combinations of embodiments. For embodiments of the processing method, embodiment 9 can be implemented independently, embodiments 9+10 can be implemented as independent embodiments, embodiments 9+10+11 can be implemented as independent embodiments, embodiments 9+12 can be implemented independently, embodiments 9+10+12 can be implemented as independent embodiments, embodiments 9+10+11+12 can be implemented as independent embodiments, embodiments 9+13 can be implemented independently, embodiments 9+10+13 can be implemented as independent embodiments, embodiments 9+10+11+13 can be implemented as independent embodiments, embodiments 9+12+13 can be implemented independently, embodiments 9+10+12+13 can be implemented as independent embodiments, embodiments 9+10+11+12+13 can be implemented as independent embodiments, and so on. The description in this application is not limited to this, and further examples will not be given here.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0071] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cell connection assembly, characterized in that, include: The base film (11) includes a first clearance hole (111), a first adhesive portion (112) and a second adhesive portion (113). The first adhesive portion (112) is at least partially disposed around the first clearance hole (111), and the second adhesive portion (113) is disposed adjacent to the first adhesive portion (112). A pole connector (12) is disposed at the first clearance hole (111) and is attached to the first adhesive part (112); The sampling component (13) is attached to the second adhesive part (113) and connected to the pole connector (12).

2. The cell connection assembly according to claim 1, characterized in that, The first adhesive part (112) includes an extension part (1121), and the sampling end of the sampling member (13) is connected to the side of the pole connector (12) facing the extension part (1121).

3. The cell connection assembly according to any one of claims 1-2, characterized in that, The base film (11) includes a cut portion (114) that extends through the base film (11) and is located on the side of the first adhesive portion (112) facing the second adhesive portion (113).

4. The cell connection assembly according to any one of claims 1-3, characterized in that, The base film (11) includes a first positioning hole (115), which is located at the first adhesive part (112) and is positioned and engaged with the pole connector (12).

5. The cell connection assembly according to any one of claims 1-4, characterized in that, The base film (11) includes a second positioning hole (116), which is disposed adjacent to the second adhesive part (113), and the second positioning hole (116) is positioned and engaged with the sampling member (13).

6. The cell connection assembly according to any one of claims 1-5, characterized in that, The base film (11) includes a second clearance hole (117) for avoiding structural components of the battery pack, and / or the second clearance hole (117) for avoiding the terminal connector (12).

7. A battery pack, characterized in that, Includes the cell connection assembly (1) as described in any one of claims 1-6.

8. A vehicle, characterized in that, The vehicle includes the battery pack as described in claim 7.

9. A processing method, characterized in that, Includes the following steps: Prepare the base film to be bonded, the electrode connector and the sampling piece; The base film, the electrode connector, and the sampling component are attached by adhesive.

10. The processing method according to claim 9, characterized in that, The preparation of the base film to be pasted, the electrode connector, and the sampling component includes: The base film is formed by die-cutting. A first adhesive portion and a second adhesive portion are prepared on the base film by roller imprinting; wherein, the first adhesive portion is used to adhere to the pole connector, and the second adhesive portion is used to adhere to the sampling component.

11. The processing method according to claim 10, characterized in that, The preparation of the base film to be pasted, the electrode connector, and the sampling component includes: After the first adhesive portion and the second adhesive portion are prepared on the base film by roller imprinting, the positioning portion of the base film used to position the roller is cut off.

12. The processing method according to any one of claims 9-11, characterized in that, The preparation of the base film to be pasted, the electrode connector, and the sampling component includes: The pole connector and the sampling component are connected by welding.

13. The processing method according to any one of claims 9-12, characterized in that, The processing method further includes: After attaching the base film, the electrode connector, and the sampling component, attach the auxiliary materials and inspect the final product.

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