Integrated busbar and battery module

Abstract

The application discloses an integrated busbar and a battery module. The integrated busbar comprises an insulating support, a busbar and a flexible circuit board. The busbar is installed on the insulating support and is used for electrically connecting with a pole of a battery monomer. The flexible circuit board is in abutment with one side of the insulating support. The flexible circuit board comprises a flexible circuit board body and a sampling module which are electrically connected with each other. The sampling module is used for sampling the battery monomer. The integrated busbar can improve the production automation degree, the product consistency and the reliability and reduce the production cost.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to integrated busbars and battery modules. Background Technology

[0002] The application of new energy batteries in daily life and industry is becoming increasingly widespread. For example, new energy vehicles equipped with batteries are already widely used, and battery packs are increasingly being used in energy storage. In new energy vehicles equipped with batteries, the battery pack can provide all or part of the power. In the field of energy storage, battery packs can be installed in energy storage enclosures or directly on the user side.

[0003] Battery packs typically include battery modules, in which multiple battery cells are electrically connected via an integrated busbar. In related technologies, the flexible circuit board of the integrated busbar has a high cost for maintenance or modification. Utility Model Content

[0004] To address the aforementioned technical issues, embodiments of this application provide an integrated busbar and battery module to reduce the maintenance or modification costs of flexible circuit boards.

[0005] The embodiments of this application are implemented through the following technical solutions.

[0006] A first aspect of this application provides an integrated busbar for electrical connection to a battery cell, the integrated busbar comprising:

[0007] Insulating support components;

[0008] A busbar is installed on the insulating support member, and the busbar is used for electrical connection with the terminal of the battery cell;

[0009] A flexible circuit board abuts against one side of the insulating support member. The flexible circuit board includes a flexible circuit board body and a sampling module that are electrically connected to each other. The sampling module is used to sample the battery cell.

[0010] In some embodiments, the insulating support has a positioning protrusion on the side facing the flexible circuit board.

[0011] The manifold has a positioning gap.

[0012] The positioning protrusion engages with the positioning gap.

[0013] In some embodiments, the sampling module includes an analog front end and at least one sampling element that are electrically connected to each other. The analog front end is electrically connected to the flexible circuit board body and is used to convert the analog signals collected by the sampling element into digital signals.

[0014] In some embodiments, each battery cell corresponds to one analog front end.

[0015] In some embodiments, the insulating support member is formed with a pressure relief valve clearance hole.

[0016] At least one of the sampling elements is a pressure relief sampling element, which is formed in the conductive layer of the flexible circuit board body.

[0017] Projecting along the vertical direction, the projection of the pressure relief valve clearance hole and the projection of the pressure relief sampling element at least partially overlap.

[0018] In some embodiments, the flexible circuit board body has a plurality of gas guide grooves and connecting ribs. The plurality of gas guide grooves are arranged at intervals along the circumference of the pressure relief sampling element, and a connecting rib is provided between two adjacent gas guide grooves along the circumference. The connecting rib has a through hole.

[0019] In some embodiments, the flexible circuit board body has temperature sampling clearance holes.

[0020] At least one of the sampling elements is a temperature sampling element.

[0021] Projecting along the vertical direction, at least a portion of the projection of the temperature sampling element and at least a portion of the projection of the manifold are located within the projection area of ​​the temperature sampling clearance hole.

[0022] In some embodiments, the analog front end includes a package and a main circuit located within the package, the temperature sampling element is located within the package and is electrically connected to the main circuit, the main circuit has pins partially exposed outside the package, the flexible circuit board body is electrically connected to the pins, and the main circuit is used to convert the analog signal of the temperature sampling element into a digital signal;

[0023] Thermally conductive adhesive is present between the encapsulation shell and the busbar.

[0024] In some embodiments, at least one of the sampling elements is a voltage sampling element, a portion of which is disposed on one side of the flexible circuit board body, a portion of which protrudes beyond the outer edge of the flexible circuit board body, and the portion of which protrudes beyond the outer edge of the flexible circuit board body contacts the busbar; and / or,

[0025] At least one of the sampling elements is a resistance sampling element, a portion of which is disposed on one side of the flexible circuit board body, a portion of which protrudes from the outer edge of the flexible circuit board body, and the portion of which protrudes from the outer edge of the flexible circuit board body contacts the busbar.

[0026] In some embodiments, each terminal of each battery cell is provided with a voltage sampling device and an internal resistance sampling device.

[0027] A second aspect of this application provides a battery module including any of the above-described integrated busbars.

[0028] In this embodiment, since the busbar is used for electrical connection with the terminals of the battery cells, the battery cells can be connected in series or in parallel. Because the flexible circuit board abuts against one side of the insulating support, the insulating support can achieve insulation between the flexible circuit board body and the battery cells. The flexible circuit board and the insulating support are in direct contact, and there is no longer an adhesive insulating film between them. Without an insulating film providing a bonding location, and with no adhesive insulating film on one side of the flexible circuit board, it is unnecessary to remove the adhesive insulating film when components in the flexible circuit board need to be replaced or modified. This allows for direct maintenance of the flexible circuit board, reducing maintenance difficulty. Furthermore, the absence of an insulating film reduces manufacturing costs. Attached Figure Description

[0029] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0030] Figure 1 A three-dimensional structural schematic diagram of a battery module provided for some embodiments of this application;

[0031] Figure 2 Provided for some embodiments of this application Figure 1 A magnified structural diagram of region A1;

[0032] Figure 3 Partial exploded view of the battery module provided for some embodiments of this application;

[0033] Figure 4 Provided for some embodiments of this application Figure 3 A schematic diagram of the enlarged structure of region B1;

[0034] Figure 5 A three-dimensional structural schematic diagram of a busbar provided for some embodiments of this application;

[0035] Figure 6 A schematic diagram of the structure of a pressure relief sampling device and a flexible circuit board body surrounding the pressure relief sampling device, provided for some embodiments of this application.

[0036] Explanation of reference numerals in the attached figures

[0037] 10. Battery module; 1. Battery cell; 11. Housing; 12. Terminal post; 2. Insulating support; 21. Positioning protrusion; 22. Pressure relief valve clearance hole; 23. Terminal post clearance hole; 24. Recess; 3. Busbar; 31. Positioning gap; 32. First busbar; 33. Second busbar; 4. Flexible circuit board; 41. Flexible circuit board body; 411. Gas guide groove; 412. Through hole; 42. Simulation front end; 421. Pressure relief sampling component; 4221. Voltage sampling component; 4222. Resistance sampling component. Detailed Implementation

[0038] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0040] In the description of the embodiments of this application, the technical terms "first," "second," "third," "fourth," "fifth," "sixth," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0041] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] In the description of the embodiments in this application, the term "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, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0043] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", 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 the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0044] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "linking," "communication," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0045] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" refers to direct contact or indirect contact, which can be contact between two parties without interaction force or contact between two parties with interaction force.

[0046] The following is a detailed description of this application.

[0047] In related technologies, battery packs typically include battery modules. The battery modules usually collect data such as temperature and voltage of the individual battery cells through flexible circuit boards integrated in the busbar. Insulating films are usually pasted on parts of the flexible circuit boards to cover the components mounted on them, which can protect the components on the flexible circuit boards to a certain extent. However, since the components on the flexible circuit boards need to be replaced or modified, and the insulating film is difficult to remove from the flexible circuit boards, the entire flexible circuit board needs to be replaced, which increases the maintenance or modification costs of the flexible circuit boards and the production costs of the battery modules.

[0048] Research has shown that it is possible to eliminate the need for an adhesive insulating film on the flexible circuit board. Instead, an insulating support can be used to support the flexible circuit board, which then contacts and rests against the insulating support. The insulating support provides insulation between parts of the flexible circuit board and the individual battery cells. This eliminates the need for an adhesive insulating film between the flexible circuit board and the insulating support, thereby reducing the maintenance or modification costs of the flexible circuit board and consequently lowering the cost of the battery module.

[0049] Based on this design concept, this application provides an integrated busbar, which includes: an insulating support; a busbar installed on the insulating support, the busbar being used for electrical connection with the terminal post of a battery cell; and a flexible circuit board abutting against one side of the insulating support, the flexible circuit board including a flexible circuit board body and a sampling module electrically connected to each other, the sampling module being used for sampling the battery cell.

[0050] Because the busbars are electrically connected to the terminals of two adjacent battery cells, the battery cells can be connected in series or parallel. Since the flexible circuit board abuts against one side of the insulating support, the insulating support provides insulation between the flexible circuit board and the battery cells. The flexible circuit board and the insulating support are in direct contact, eliminating the need for an adhesive insulating film between them. Without an insulating film providing a bonding point, and with no adhesive insulating film on one side of the flexible circuit board, replacement or modification of components within the flexible circuit board is unnecessary. Maintenance can be performed directly on the flexible circuit board, reducing maintenance difficulty. Furthermore, the elimination of the insulating film reduces manufacturing costs.

[0051] Since the sampling module is used to sample individual battery cells, it can monitor the voltage, current, or temperature of individual battery cells, reducing the probability of overcharging, over-discharging, or large-area thermal runaway of the battery module.

[0052] For example, integrated busbars can also improve production automation, enhance product consistency and reliability, and reduce production costs.

[0053] Some embodiments of this application provide a battery module, which is an intermediate energy storage unit composed of multiple battery cells connected in series and parallel, and integrating thermal management, mechanical fixing, electrical protection and other systems.

[0054] Some embodiments of this application provide a battery pack, which is a complete energy storage system composed of multiple integrated battery modules and equipped with a battery management unit, thermal management system, structural protection, high-voltage electrical components, etc. The battery pack can be applied to electric vehicles, energy storage systems, electric ships, marine equipment, industrial equipment, electronic equipment, etc.

[0055] Some embodiments of this application provide an energy storage device, which is a system that stores energy in the form of electrical energy, chemical energy, mechanical energy, etc., and releases it when needed. It can be applied in various fields such as power systems, transportation, industry, homes, and emerging technologies.

[0056] Below, refer to Figures 1 to 6 Some embodiments of this application will be described in detail.

[0057] The first aspect of this application provides a battery module 10, such as Figures 1 to 3 As shown, the battery module 10 includes a battery cell 1, an insulating support 2, a busbar 3, and a flexible circuit board 4. The battery cell 1 includes a housing 11, a bare cell (not shown) located within the housing 11, and terminals 12 electrically connected to the bare cell (not shown). The terminals 12 are mounted on the housing 11, and there are at least two battery cells 1. The insulating support 2 is located on the side of the housing 11 facing the terminals 12. The busbar 3 is mounted on the insulating support 2 and is electrically connected to the terminals 12 of two adjacent battery cells 1. The flexible circuit board 4 abuts against the side of the insulating support 2 away from the housing 11. The flexible circuit board 4 includes a flexible circuit board body 41 electrically connected to each other and a sampling module, which is used to sample the battery cells 1.

[0058] The flexible circuit board 4 abuts against the side of the insulating support 2 away from the outer shell 11, and the flexible circuit board 4 contacts the side of the insulating support 2 away from the outer shell 11, but they are not bonded together.

[0059] The battery cell 1 is the most basic energy storage unit in the battery system, which can directly store and release electrical energy through electrochemical reactions.

[0060] A bare battery cell consists of a positive electrode, a negative electrode, and a separator.

[0061] The outer casing 11 is used to encapsulate the bare battery cell.

[0062] Terminal 12 is electrically connected to the bare cell and is used to conduct current into or out of the bare cell.

[0063] The insulating support 2 has an insulating function and is used to partially insulate the battery cell 1 from the flexible circuit board 4.

[0064] The busbar 3 is used to electrically connect to the terminals 12 of two adjacent battery cells 1, enabling the battery cells 1 to be connected in parallel, in series, or in a mixed configuration. It should be explained that a mixed configuration means that the battery module 10 contains both battery cells 1 connected in parallel and battery cells 1 connected in series.

[0065] Flexible Printed Circuit 4 is a bendable circuit board made of flexible substrate, used in battery module 10 to realize high-density electrical connections, signal acquisition and transmission, while adapting to the compact space and mechanical deformation requirements inside the module.

[0066] The sampling module is used to sample battery cell 1. The sampling module can collect data such as temperature and voltage of battery cell 1.

[0067] The sampling module is integrated into the flexible circuit board body 41.

[0068] This application does not specifically limit the material, shape and size of the casing 11. The material of the casing 11 can be the common material used for the casing 11 of the battery cell 1 in the battery field.

[0069] For example, the positive electrode, negative electrode, and separator are stacked and wound to form a wound bare cell.

[0070] For example, a positive electrode, a negative electrode, and a separator are stacked to form a laminated bare cell.

[0071] For example, the pole post 12 may be located on the top wall, side wall or bottom wall of the housing 11.

[0072] For example, there can be two poles 12, with opposite electrical polarities, one pole 12 being the positive pole and the other pole 12 being the negative pole.

[0073] For example, the terminal 12 and the bare cell can be directly connected or indirectly connected.

[0074] For example, the terminal 12 and the bare cell can be connected via an adapter.

[0075] For example, the number of battery cells 1 can be two, three, four, or five, etc.

[0076] For example, the insulating support 2 can be made of a material that is resistant to high temperature, has high insulation, high pressure resistance, and meets the U94-V0 flame retardant rating.

[0077] For example, such as Figure 3 As shown, the insulating support 2 can be a plate-shaped structure perpendicular to the arrangement direction of the battery cell 1 and the insulating support 2, thereby reducing the size of the battery module 10 along the arrangement direction of the battery cell 1 and the insulating support 2.

[0078] For example, such as Figure 1 As shown, the battery cell 1 can be arranged in a direction perpendicular to the arrangement direction of the battery cell 1 and the insulating support 2, and the insulating support 2 is a long strip plate.

[0079] For example, such as Figure 1 As shown, the battery cells 1 can be arranged in the left-right direction, and the length of the insulating support 2 in the left-right direction is greater than the length of the insulating support 2 in the front-back direction.

[0080] For example, such as Figure 3 As shown, the busbar 3 is installed on the side of the insulating support 2 away from the battery cell 1. The insulating support 2 has a terminal clearance hole 23, and the busbar 3 is electrically connected to the terminal 12 through the terminal clearance hole 23.

[0081] For example, the busbar 3 can be a pure aluminum sheet.

[0082] For example, the material of the busbar 3 can be the same as that of the pole 12.

[0083] For example, the surface of the busbar 3 can be specially treated to improve the welding reliability between the busbar 3 and the pole 12.

[0084] For example, the busbar 3 and the insulating support 2 can be directly or indirectly connected.

[0085] For example, the busbar 3 and the insulating support 2 can be fixedly connected.

[0086] For example, such as Figure 3 As shown, the insulating support 2 has a pole clearance hole 23 corresponding to each pole post 12, and the pole clearance holes 23 corresponding to each pole post 12 are not interconnected.

[0087] For example, the polarities of the terminals 12 of two adjacent battery cells 1 connected by the busbar 3 can be the same or opposite.

[0088] For example, such as Figure 1 and Figure 3 As shown, the insulating support 2 is connected between the battery cell 1 and the flexible circuit board 4. The insulating support 2 and the flexible circuit board 4 are in direct contact, that is, there are no components between the insulating support 2 and the flexible circuit board 4.

[0089] For example, such as Figure 3 As shown, the sampling module can be set on the side of the flexible circuit board body 41 away from the insulating support 2.

[0090] For example, a single-cluster or multi-cluster battery management system includes a Battery Analysis Unit, a Battery Control Unit, and several Battery Management Units. Part of the circuitry of the Battery Management Unit is integrated onto a flexible printed circuit board within the CellsContact System assembly.

[0091] In this embodiment, since the busbar 3 is electrically connected to the terminals 12 of two adjacent battery cells 1, the battery cells 1 can be connected in series or in parallel. Because the flexible circuit board 4 abuts against one side of the insulating support 2, the insulating support 2 can achieve insulation between the flexible circuit board body 41 and the battery cells 1. The flexible circuit board 4 and the insulating support 2 are in direct contact, and no adhesive insulating film is provided between them. Without the insulating film providing a bonding location, and with no adhesive insulating film on one side of the flexible circuit board 4, it is unnecessary to remove the adhesive insulating film when components in the flexible circuit board 4 need to be replaced or modified. This allows for direct maintenance of the flexible circuit board, reducing maintenance difficulty. Furthermore, the absence of an insulating film reduces manufacturing costs.

[0092] Since the sampling module is used to sample the battery cell 1, it can monitor the voltage, current or temperature of the battery cell 1, thereby reducing the probability of overcharging, over-discharging or large-area thermal runaway of the battery module 10.

[0093] For example, integrated busbars can also improve production automation, enhance product consistency and reliability, and reduce production costs.

[0094] Multiple battery cells in the battery module are electrically connected through an integrated busbar.

[0095] The integrated busbar in the embodiments of this application, such as Figures 1 to 3 As shown, the integrated busbar is used for electrical connection with the battery cell. The integrated busbar includes an insulating support 2, a busbar 3, and a flexible circuit board 4. The busbar 3 is mounted on the insulating support 2 and is used for electrical connection with the terminal post 12 of the battery cell 1. The flexible circuit board 4 abuts against one side of the insulating support 2. The flexible circuit board 4 includes a flexible circuit board body 41 and a sampling module that are electrically connected to each other. The sampling module is used to sample the battery cell 1.

[0096] For example, the flexible circuit board 4 abuts against the upper side of the insulating support 2.

[0097] In this embodiment, since the busbar 3 is used for electrical connection with the terminal post 12 of the battery cell 1, the battery cell 1 can be connected in series or in parallel. Because the flexible circuit board 4 abuts against one side of the insulating support 2, the insulating support 2 can achieve insulation between the flexible circuit board body 41 and the battery cell 1. The flexible circuit board 4 and the insulating support 2 are in direct contact, and no adhesive insulating film is provided between the flexible circuit board 4 and the insulating support 2. Without the insulating film providing an adhesive location, and with no adhesive insulating film on one side of the flexible circuit board 4, it is unnecessary to remove the adhesive insulating film when components in the flexible circuit board 4 need to be replaced or modified. Maintenance operations can be performed directly on the flexible circuit board, reducing the maintenance difficulty. Furthermore, the flexible circuit board does not require an insulating film, which reduces its manufacturing cost.

[0098] For example, integrated busbars can also improve production automation, enhance product consistency and reliability, and reduce production costs.

[0099] In some embodiments, such as Figure 3 and Figure 4 As shown, the insulating support 2 has a positioning protrusion 21 on the side facing the flexible circuit board 4, and the busbar 3 has a positioning gap 31. The positioning protrusion 21 and the positioning gap 31 are engaged and connected.

[0100] For example, the upper side of the insulating support 2 has a positioning protrusion 21.

[0101] For example, the insulating support 2 has a positioning protrusion 21 on the side opposite to the battery cell 1.

[0102] For example, the busbar 3 is installed on the side of the insulating support 2 away from the battery cell 1.

[0103] For example, the insulating support 2 is provided with a flexible circuit board 4 and a busbar 3 on the side facing the positioning protrusion 21.

[0104] For example, the number of pole clearance holes 23 can be one, two, three or four, etc.

[0105] For example, such as Figure 5 As shown, the number of positioning gaps 31 can be one, two, three, or four, etc.

[0106] For example, such as Figure 4 As shown, the outer contour of the positioning gap 31 and the outer contour of the positioning protrusion 21 can be similar.

[0107] For example, such as Figure 1 and Figure 4As shown, along the arrangement direction of the battery cell 1 and the insulating support 2, the cross-sectional area of ​​the positioning protrusion 21 perpendicular to the arrangement direction of the battery cell 1 and the insulating support 2 decreases. For example, the cross-sectional area of ​​the positioning protrusion 21 perpendicular to the arrangement direction of the battery cell 1 and the insulating support 2 gradually decreases, which makes it easier for the positioning protrusion 21 to pass through the positioning gap 31.

[0108] For example, such as Figure 4 and Figure 5 As shown, the busbar 3 includes a first busbar section 32 and a second busbar section 33 connected to each other. The insulating support member 2 has a terminal clearance hole 23. Along the arrangement direction of the battery cell 1 and the insulating support member 2, the terminal clearance hole 23 that overlaps with the first busbar section 32 is the first terminal clearance hole. Along the arrangement direction of the battery cell 1 and the insulating support member 2, the terminal clearance hole 23 that overlaps with the second busbar section 33 is the second terminal clearance hole. There is a terminal clearance hole connecting part between the first terminal clearance hole and the second terminal clearance hole. The terminal clearance hole 23 connecting part has two positioning protrusions 21. The two positioning protrusions 21 are respectively engaged with the positioning gaps 31 on the first busbar section and the second busbar section.

[0109] For example, the pole 12 passes through the pole clearance hole 23 and connects to the bus.

[0110] For example, such as Figure 4 As shown, the insulating support 2 has a recess 24, and the busbar 3 is at least partially located within the recess 24. This reduces the size of the busbar 3 extending beyond the insulating support 2, decreases the height of the battery module 10 along the arrangement direction of the battery cell 1 and the insulating support 2, and the recess can limit the busbar 3, reducing the probability of misalignment between the insulating support 2 and the busbar 3, thereby reducing the probability of misalignment between the busbar 3 and the terminal post 12 and improving the assembly efficiency of the battery module 10.

[0111] For example, a portion of the bottom wall of the recess 24 forms a pole clearance hole 23.

[0112] For example, the outer surface of the pole 12 away from the housing 11 is substantially flush with the bottom of the recess 24, thereby enabling the pole 12 to make contact with the bus 3.

[0113] In this embodiment, since the positioning protrusion 21 engages with the positioning gap 31, the busbar 3 and the insulating support 2 can be fixed, which facilitates the electrical connection between the busbar 3 and the pole 12 during the installation of the insulating support 2, since the position of the busbar 3 relative to the insulating support 2 is fixed.

[0114] It is understood that the specific structure of the insulating support and the busbar is not limited. For example, the busbar may not have positioning holes, and the positioning protrusion 21 abuts against the opposite edge of the busbar to limit the busbar 3.

[0115] In some embodiments, the sampling module includes an analog front end 42 and at least one sampling element that are electrically connected to each other. The analog front end 42 is electrically connected to the flexible circuit board body and is used to convert the analog signals collected by the sampling element into digital signals.

[0116] The sampling device is used to collect data such as temperature and voltage of battery cell 1.

[0117] The analog front end 42 is used to convert the analog signals such as temperature and voltage of the battery cell 1 collected by the sampling device into digital signals, and transmit the digital signals to the flexible circuit board body 41, and then to the battery management unit. The battery management unit adjusts the battery cell 1 according to the received digital signals.

[0118] For example, one analog front end 42 can correspond to one, two, three or four sampling devices.

[0119] In this embodiment, since the analog front end 42 is electrically connected to both the sampling device and the flexible circuit board body, the analog front end 42 can convert the analog signals collected by the sampling device into digital signals, and then transmit the electrical signals to the flexible circuit board body to realize the signal sampling function of the flexible circuit board 4. Moreover, since the analog front end 42 can convert the analog signals collected by the sampling device into digital signals, it is equivalent to integrating part of the circuit in the battery management unit into the flexible circuit board. The battery management unit can obtain the digital signals corresponding to the collected parameters by communicating with the flexible circuit board, which can reduce the number of analog signal lines between the sampling device and the battery management unit, reduce the probability of errors caused by the need for manual intervention in the wiring process, and improve the production yield, integration, consistency and reliability of the battery module 10.

[0120] It is understood that the specific arrangement of the analog front-end 42 is not limited. For example, the analog front-end 42 can be decoupled from the flexible circuit board, or it can be integrated into the battery management unit.

[0121] In some embodiments, each battery cell 1 corresponds to an analog front end 42.

[0122] For example, each battery cell 1 corresponds to at least one sampling device, and the sampling devices used to sample the same battery cell 1 are all electrically connected to an analog front end 42.

[0123] In this embodiment, since each battery cell 1 corresponds to a simulated front-end 42, the flexible circuit board 4 can collect data from each battery cell 1, facilitating better monitoring of the voltage, current, or temperature of each battery cell 1, and further reducing the probability of overcharging, over-discharging, or large-area thermal runaway in the battery module 10. Furthermore, it allows for closer proximity between each battery cell 1 and its corresponding simulated front-end 42, and between the corresponding sampling element and the simulated front-end 42, resulting in lower impedance between the sampling element and the simulated front-end 42, which is beneficial for more accurate measurement.

[0124] It should be explained here that two or three equal battery cells 1 can correspond to one analog front end 42.

[0125] It is understood that the specific arrangement of the analog front-end 42 is not limited. For example, the number of analog front-end 42 in a flexible circuit board can be one.

[0126] In some embodiments, such as Figures 1 to 4 As shown, the insulating support 2 has a pressure relief valve clearance hole 22, and at least one sampling element is a pressure relief sampling element 421. The pressure relief sampling element 421 is formed on the conductive layer of the flexible circuit board body 41. When projected in the vertical direction, the projection of the pressure relief valve clearance hole 22 and the projection of the pressure relief sampling element 421 at least partially overlap.

[0127] For example, the battery cell 1 includes a pressure relief valve (not shown) mounted on the side of the housing 11 facing the terminal post 12.

[0128] The pressure relief valve is used to automatically and directionally release gas or liquid when the internal pressure of battery cell 1 rises abnormally, preventing battery cell 1 from rupturing, exploding or thermal runaway due to overpressure.

[0129] The pressure relief valve clearance hole 22 is a gap formed by the insulating support member 2. During the pressure relief process, the gas or liquid ejected from the pressure relief valve can pass through the pressure relief valve clearance hole 22, so that the ejected gas or liquid can come into contact with the pressure relief sampling member 421.

[0130] The pressure relief sampling device 421 is used to detect whether the pressure relief valve of the battery cell 1 is damaged, and then to detect whether the battery cell 1 is thermally runaway. In the event of thermal runaway of the battery cell 1, the pressure relief sampling device 421 transmits the detected thermal runaway analog signal of the battery cell 1 to the analog front end 42.

[0131] For example, when projected onto the same projection plane along the arrangement direction of the battery cell 1 and the insulating support frame, the projections of the pressure relief valve, the pressure relief valve clearance hole 22, and the pressure relief sampling element 421 at least partially overlap.

[0132] For example, the flexible circuit board body 41 is a flexible printed circuit board, which can be single-sided, double-sided, or multilayer. The substrate used is mainly polyimide copper-clad laminate. This material has high heat resistance and good dimensional stability. It is pressed together with a cover film that has both mechanical protection and good electrical insulation properties to form the final product. The surface and inner conductors of double-sided and multilayer printed circuit boards are electrically connected to the inner and outer circuits through metallization. The flexible circuit board body 41 can be divided into four functions: lead line, printed circuit, connector, and integration of function. Its applications cover computers, computer peripheral systems, consumer electronics, and automobiles.

[0133] For example, after the circuit is completed, a protective film is then applied to a single-sided PI copper-clad board material to form a flexible circuit board with only a single layer of conductor.

[0134] For example, after the double-sided circuit is completed using double-sided PI board copper clad board material, a protective film is added to each side to form a circuit board with double-layer conductors.

[0135] For example, a portion of the copper plate forms a pressure relief sampling element 421.

[0136] The pressure relief sampling component 421 is formed on the conductive layer of the flexible circuit board body 41, and is fabricated on the conductive layer. The pressure relief sampling component 421 transmits the collected analog signal of thermal runaway of battery cell 1 to the circuit located on the conductive layer of the flexible circuit board body 41, and then to the analog front end 42 through the circuit on the conductive layer. The circuit located on the conductive layer of the flexible circuit board body 41 is electrically connected to the analog front end 42. The analog front end 42 converts the analog signal into a digital signal and transmits the digital signal to the flexible circuit board body 41, and then to the Battery Management Unit.

[0137] like Figure 1 As shown, the pressure relief valve and the pole 12 are located on the same outer surface of the housing 11.

[0138] For example, the outer contour of the pressure relief sampling element 421 can be circular, square, or other regular or irregular shapes.

[0139] For example, the outer contour of the pressure relief valve can be circular, square, or other regular or irregular shapes.

[0140] For example, the outer contour of the pressure relief valve clearance hole 22 can be circular, square, or other regular or irregular shapes.

[0141] For example, the shape of the outer contour of the pressure relief sampling member 421, the shape of the outer contour of the pressure relief valve, and the shape of the outer contour of the pressure relief valve clearance hole 22 may be the same or different from each other.

[0142] For example, the outer contours of the pressure relief sampling component 421, the pressure relief valve, and the pressure relief valve clearance hole 22 are similar. For instance, the outer contours of the pressure relief valve and the pressure relief valve clearance hole 22 are both racetrack-shaped.

[0143] For example, each pressure relief valve corresponds to a pressure relief valve clearance hole 22 and a pressure relief sampling element 421.

[0144] For example, multiple pressure relief valves may correspond to one pressure relief valve clearance port 22.

[0145] For example, multiple pressure relief valves may correspond to one pressure relief sampling element 421.

[0146] For example, when projected onto the same projection plane along the arrangement direction of the battery cell 1 and the insulating support frame, the projection of the pressure relief valve, the projection of the pressure relief valve clearance hole 22, and the projection of the pressure relief sampling component 421 partially overlap.

[0147] For example, when projected onto the same projection plane along the arrangement direction of the battery cell 1 and the insulating support frame, the projections of the pressure relief valve, the pressure relief valve clearance hole 22, and the pressure relief sampling component 421 almost completely overlap.

[0148] For example, the projection of the pressure relief valve is located within the projection range of the pressure relief valve clearance hole 22, projected onto the same projection plane along the arrangement direction of the battery cell 1 and the insulating support frame.

[0149] For example, when projected onto the same projection plane along the arrangement direction of the battery cell 1 and the insulating support frame, the projection of the pressure relief valve clearance hole 22 is located within the projection range of the pressure relief sampling component 421.

[0150] In this embodiment, since the pressure relief sampling element 421 is formed on the conductive layer of the flexible circuit board body 41, it can be integrated with the flexible circuit board 4, improving the integration of the flexible circuit board 4. The pressure relief sampling element 421 and the flexible circuit board 4 do not require wiring harness connection, improving the production efficiency, yield, and consistency of the battery module 10. Because the projections of the battery cell 1 and the insulating support frame onto the same projection plane are at least partially overlapping, when the battery cell 1 experiences thermal runaway and the pressure relief valve ruptures, the electrolyte released by the battery cell 1 can flow through the pressure relief valve clearance hole 22 to the pressure relief sampling element 421, thereby enabling the pressure relief sampling element 421 to detect the thermal runaway of the battery cell 1.

[0151] It is understood that the specific arrangement of the pressure relief valve sampling components is not limited. For example, the pressure relief valve sampling components can be manufactured independently and then installed onto the flexible circuit board body.

[0152] In some embodiments, such as Figure 3 and Figure 6 As shown, the flexible circuit board body 41 has multiple gas guide grooves 411 and connecting ribs. The multiple gas guide grooves 411 are arranged at intervals along the circumference of the pressure relief sampling component 421. A connecting rib is provided between two adjacent gas guide grooves along the circumference, and the connecting rib has a through hole 412.

[0153] For example, the number of gas guide channels 411 can be one, two, three, or four, etc.

[0154] For example, the outer contour of the gas guide groove 411 can be circular, square, or other regular or irregular shapes. In a specific embodiment, the outer contour of the gas guide groove 411 is elongated, and the corners of the elongated gas guide groove 411 can be rounded.

[0155] Liquid or gas ejected from the pressure relief valve can flow out from the gas guide groove 411, which can meet the normal venting requirements.

[0156] For example, the number of through holes 412 can be one, two, three, or four, etc.

[0157] For example, the outer contour of the through hole 412 can be circular, square, or other regular or irregular shapes.

[0158] For example, multiple gas guide slots 411 are arranged at intervals along the circumference of the sampling element. Some adjacent gas guide slots 411 may have through holes 412 between them, or all adjacent gas guide slots 411 may have through holes 412 between them.

[0159] In this embodiment, since the through hole 412 is located between adjacent gas guide grooves 411 along the circumferential direction of the pressure relief sampling member 421, the strength of the pressure relief sampling member 421 is low along the circumferential direction. In the event of excessive pressure relief during the pressure relief process of the battery cell 1, the area connecting the through hole 412 and the gas guide groove 411 can be disconnected. This reduces the pressure relief applied to the flexible circuit board body 41 and lowers the probability of damage to the flexible circuit board body 41 due to excessive impact from the pressure relief pressure of the battery cell 1.

[0160] Understandably, the connecting ribs may not have through holes.

[0161] In some embodiments, such as Figure 1 and Figure 2 As shown, the flexible circuit board body 41 has a temperature sampling clearance hole (not shown), and at least one sampling element is a temperature sampling element. The projection of the temperature sampling element and at least a portion of the projection of the busbar 3 are located within the projection area of ​​the temperature sampling clearance hole.

[0162] The temperature sampling clearance hole (not shown) is a gap formed by the insulating support 2.

[0163] The temperature sampling device is used to detect the temperature of battery cell 1, and the temperature sampling device transmits the detected temperature analog signal of battery cell 1 to the analog front end 42.

[0164] For example, the projection of the temperature sampling element and at least a portion of the current collector 3 are located within the projection area of ​​the temperature sampling clearance hole, along the arrangement direction of the battery cell 1 and the insulating support frame.

[0165] For example, the outer contour of the temperature sampling element can be circular, square, or other regular or irregular shapes.

[0166] For example, the outer contour of the temperature sampling clearance hole can be circular, square, or other regular or irregular shapes.

[0167] For example, the shape of the outer contour of the temperature sampling clearance hole and the shape of the outer contour of the temperature sampling element may be the same or different.

[0168] For example, each manifold 3 corresponds to a temperature sampling clearance hole and a temperature sampling element.

[0169] For example, the temperature sampling element is projected onto the same projection plane along the arrangement direction of the battery cell 1 and the insulating support frame, and the portion of the projection of the temperature sampling element is located within the projection area of ​​the temperature sampling clearance hole.

[0170] For example, the projection of the busbar 3 is partially or entirely located within the projection area of ​​the temperature sampling clearance hole, along the arrangement direction of the battery cell 1 and the insulating support frame.

[0171] For example, the projection of the temperature sampling clearance hole is located within the projection range of the busbar 3, projected along the arrangement direction of the battery cell 1 and the insulating support frame onto the same projection plane.

[0172] For example, the projection of the temperature sampling clearance hole is located within the projection range of the temperature sampling element, projected along the arrangement direction of the battery cell 1 and the insulating support frame onto the same projection plane.

[0173] In this embodiment of the disclosure, since at least a portion of the projection of the temperature sampling element and at least a portion of the projection of the busbar 3 are located within the projection area of ​​the temperature sampling clearance hole, the temperature sampling element can collect the temperature of the busbar 3 through the temperature sampling clearance hole, thereby realizing the function of the flexible circuit board 4 to collect the temperature of the busbar 3, and further realizing the function of the flexible circuit board 4 to collect the temperature of the battery cell 1, thus realizing the monitoring of the temperature of the battery cell 1.

[0174] It is understood that the flexible circuit board body 41 may not have clearance holes. The temperature sampling element and the busbar 3 are located on both sides of the flexible circuit board body 41. The heat of the busbar is transferred from one side of the flexible circuit board body through the flexible circuit board to the temperature sampling element on the other side. Thus, the temperature sampling element can collect the temperature of the busbar 3.

[0175] In some embodiments, the analog front end 42 includes a package and a main circuit (not shown) located inside the package. The temperature sampling element is located inside the package and is electrically connected to the main circuit. The main circuit (not shown) has pins (not shown) partially exposed outside the package. The flexible circuit board body is electrically connected to the pins. The main circuit is used to convert the analog signal of the temperature sampling element into a digital signal. Thermally conductive adhesive (not shown) is provided between the package and the bus 3.

[0176] The package is used to encapsulate at least a portion of the main circuit, with the pins of the main circuit exposed in the package and electrically connected to the flexible circuit board body. The pins are capable of transmitting digital signals from the main circuit to the flexible circuit board body.

[0177] The temperature sampling device is electrically connected to the main circuit. The temperature sampling device transmits the analog signal of the temperature of the battery cell 1 to the main circuit, and the main circuit converts the analog signal of the temperature sampling device into a digital signal.

[0178] The temperature sampling element is located inside the package. There is a temperature sampling clearance hole between the package and the busbar 3. The temperature sampling clearance hole contains thermally conductive adhesive. The busbar 3 is in contact with the electrode 12. The busbar 3 can conduct the heat of the electrode 12 to the thermally conductive adhesive. The thermally conductive adhesive conducts the heat to the package. The package conducts the heat to the temperature sampling element. The temperature sampling element collects the temperature.

[0179] For example, the packaging shell can be made of a material with high thermal conductivity.

[0180] For example, the analog front-end 42 includes a main circuit with pins electrically connected to the flexible circuit board body 41. A portion of the sampling components are electrically connected to the main circuit. The sampling components transmit the acquired analog signals to the main circuit. The main circuit converts the analog signals into digital signals and transmits the digital signals to the pins. The pins then transmit the digital signals to the flexible circuit board body 41, and subsequently to the Battery Management Unit. The pins function as both input and output signals.

[0181] Thermally conductive adhesives are insulating and thermally conductive adhesives. For example, epoxy resin thermally conductive adhesives can be used.

[0182] In this embodiment, since the flexible circuit board body is electrically connected to the pins, and the pins are exposed outside the package and connected to the busbar 3 via thermally conductive adhesive, the temperature sampling device can collect the temperature of the busbar 3 through the pins. Furthermore, because there is thermally conductive adhesive between the package and the busbar 3, and the pins are connected to the busbar 3 via the thermally conductive adhesive, the distance between the pins and the busbar 3 is short, reducing the probability of a large temperature difference between the area of ​​the busbar 3 and the area where the pins collect the temperature due to heat exchange with the outside environment, thus improving the temperature collection accuracy of the temperature sampling device. Additionally, the flexible circuit board and the busbar 3 can be bonded together using thermally conductive adhesive, thus fixing the flexible circuit board and the busbar 3 together.

[0183] Understandably, the temperature sampling element can also be located outside the package, connected to the main circuitry inside the package. For example, it can be connected via pins.

[0184] In some embodiments, such as Figures 1 to 3 As shown, at least one sampling element is a voltage sampling element 4221. At least a portion of the voltage sampling element 4221 is disposed on one side of the flexible circuit board body 41, and a portion of the voltage sampling element 4221 protrudes beyond the outer edge of the flexible circuit board body 41. The portion of the voltage sampling element 4221 protruding beyond the outer edge of the flexible circuit board body 41 contacts the busbar 3. And / or, at least one sampling element is a resistance sampling element 4222. A portion of the resistance sampling element 4222 is disposed on one side of the flexible circuit board body 41, and a portion of the resistance sampling element 4222 protrudes beyond the outer edge of the flexible circuit board body. The portion of the resistance sampling element 4222 protruding beyond the outer edge of the flexible circuit board body contacts the busbar 3.

[0185] The voltage sampling unit 4221 transmits the analog signal of the voltage of the battery cell 1 to the analog front end 42, and the analog front end 42 converts the analog signal collected by the voltage sampling unit into a digital signal.

[0186] The resistance sampling device 4222 transmits the analog signal of the resistance of the battery cell 1 to the analog front end 42, and the analog front end 42 converts the analog signal collected by the resistance sampling device into a digital signal.

[0187] At least a portion of the voltage sampling element 4221 is disposed on the upper side of the flexible circuit board body 41.

[0188] A portion of the resistance sampling element 4222 is disposed on the upper side of the flexible circuit board body 41.

[0189] For example, at least a portion of the voltage sampling element 4221 is disposed on the side of the flexible circuit board body 41 opposite to the battery cell 1.

[0190] For example, a portion of the resistance sampling element 4222 is disposed on the side of the flexible circuit board body 41 opposite to the battery cell 1.

[0191] For example, a portion of the voltage sampling element 4221 is located on the side of the flexible circuit board body 41 away from the battery cell 1, and a portion protrudes from the outer edge of the flexible circuit board body 41. The portion of the voltage sampling element 4221 protruding from the flexible circuit board body 41 contacts the busbar 3.

[0192] For example, such as Figure 2 As shown, the voltage sampling device 4221 includes a first part, a second part, and a third part connected together. The first part is located on the side of the flexible circuit board body 41 away from the battery cell 1 and is electrically connected to the flexible circuit board body 41. The third part is located on the side of the busbar 3 away from the battery cell 1 and is electrically connected to the busbar 3. The second part is electrically connected to the first part and the third part. Thus, the third part collects the voltage of the busbar 3 and transmits the collected voltage analog signal to the second part, and then to the first part. The first part transmits the collected voltage analog signal to the analog front end 42.

[0193] For example, the first part, the second part, and the third part may have the same or different shapes.

[0194] For example, the first part, the second part, and the third part are all plate-shaped.

[0195] For example, the first part, the second part, and the third part are configured in a "Z" shape.

[0196] For example, the voltage sampling element can be a nickel sheet.

[0197] For example, a portion of the resistance sampling element 4222 is located on the side of the flexible circuit board body 41 away from the battery cell 1, and a portion protrudes from the outer edge of the flexible circuit board body 41. The portion of the resistance sampling element 4222 protruding from the flexible circuit board body 41 contacts the busbar 3.

[0198] For example, such as Figure 2 As shown, the resistance sampling device 4222 includes a fourth part, a fifth part, and a sixth part connected together. The fourth part is located on the side of the flexible circuit board body 41 away from the battery cell 1 and is electrically connected to the flexible circuit board body 41. The sixth part is located on the side of the busbar 3 away from the battery cell 1 and is electrically connected to the busbar 3. The fifth part is electrically connected to the fourth part and the sixth part. Thus, the sixth part collects the voltage of the busbar 3 and transmits the collected resistance analog signal to the fifth part, and then to the fourth part. The fourth part transmits the collected resistance analog signal to the analog front end 42.

[0199] For example, the shapes of the fourth, fifth, and sixth parts may be the same or different.

[0200] For example, the fourth, fifth and sixth parts are all plate-shaped.

[0201] For example, the fourth, fifth and sixth parts are configured in a "Z" shape.

[0202] For example, the resistance sampling element can be a nickel sheet.

[0203] Because a portion of the voltage sampling element protrudes from the outer edge of the flexible circuit board body, this protruding portion can contact the busbar, thereby enabling the voltage sampling element to acquire the voltage of a single battery cell. Similarly, because a portion of the resistance sampling element protrudes from the outer edge of the flexible circuit board body, this protruding portion can contact the busbar, thereby enabling the resistance sampling element to acquire the resistance of a single battery cell.

[0204] In some embodiments, each terminal post 12 of each battery cell 1 is provided with a voltage sampling device and an internal resistance sampling device.

[0205] For example, at least one terminal of each battery cell is provided with two nickel plates. Both nickel plates are electrically connected to the corresponding electrode plate of the terminal. The two nickel plates lead out two identical electrical signals. One electrical signal is converted into a voltage signal by analog front-end 42, and the other is converted into an internal resistance signal by analog front-end 42. The dual nickel plate design improves the reliability and accuracy of the battery system in the voltage acquisition stage through the synergistic optimization of redundancy, current sharing and anti-interference.

[0206] This allows for monitoring of the voltage and resistance of each individual battery cell.

[0207] It is understandable that each terminal post 12 of each battery cell 1 can be equipped with either a voltage sampling device or an internal resistance sampling device.

[0208] A second aspect of this application provides a battery pack, which includes the battery module 10 described above.

[0209] Since the battery pack includes the aforementioned battery module 10, the maintenance or modification costs of the flexible circuit board can be reduced, thereby reducing the maintenance or modification costs of the battery pack.

[0210] A third aspect of this application provides an energy storage device, which includes the aforementioned battery module 10 or at least one of the aforementioned battery packs, wherein the battery cell 1 or the battery pack is used to store or provide electrical energy.

[0211] Since the energy storage device includes the aforementioned battery module 10 or at least one of the aforementioned battery packs, the maintenance or modification costs of the flexible circuit board can be reduced, thereby reducing the maintenance or modification costs of the energy storage device.

[0212] This application provides a battery module including the integrated busbar of any of the above embodiments.

[0213] For example, the battery module further includes battery cells, each battery cell including a housing, a bare cell located inside the housing, and a terminal electrically connected to the bare cell, the terminal being mounted on the housing, and the number of battery cells being at least two.

[0214] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of this application.

Claims

1. An integrated busbar, characterized in that, For electrical connection with individual battery cells, the integrated busbar includes: Insulating support components; A busbar is installed on the insulating support member, and the busbar is used for electrical connection with the terminal of the battery cell; A flexible circuit board abuts against one side of the insulating support member. The flexible circuit board includes a flexible circuit board body and a sampling module that are electrically connected to each other. The sampling module is used to sample the battery cell.

2. The integrated busbar according to claim 1, characterized in that, The insulating support has a positioning protrusion on the side facing the flexible circuit board. The manifold has a positioning gap. The positioning protrusion engages with the positioning gap.

3. The integrated busbar according to claim 1, characterized in that, The sampling module includes an analog front end and at least one sampling element that are electrically connected to each other. The analog front end is electrically connected to the flexible circuit board body and is used to convert the analog signals collected by the sampling element into digital signals.

4. The integrated busbar according to claim 3, characterized in that, Each battery cell corresponds to one analog front end.

5. The integrated busbar according to claim 4, characterized in that, The insulating support member has a pressure relief valve clearance hole. At least one of the sampling elements is a pressure relief sampling element, which is formed in the conductive layer of the flexible circuit board body. Projecting along the vertical direction, the projection of the pressure relief valve clearance hole and the projection of the pressure relief sampling element at least partially overlap.

6. The integrated busbar according to claim 5, characterized in that, The flexible circuit board body has multiple gas guide grooves and connecting ribs. The multiple gas guide grooves are arranged at intervals along the circumference of the pressure relief sampling component. A connecting rib is provided between two adjacent gas guide grooves along the circumference, and the connecting rib has a through hole.

7. The integrated busbar according to claim 4, characterized in that, The flexible circuit board body has temperature sampling avoidance holes. At least one of the sampling elements is a temperature sampling element. Projecting along the vertical direction, at least a portion of the projection of the temperature sampling element and at least a portion of the projection of the manifold are located within the projection area of ​​the temperature sampling clearance hole.

8. The integrated busbar according to claim 7, characterized in that, The analog front end includes a package and a main circuit located inside the package. The temperature sampling device is located inside the package and is electrically connected to the main circuit. The main circuit has pins partially exposed outside the package. The flexible circuit board body is electrically connected to the pins. The main circuit is used to convert the analog signal of the temperature sampling device into a digital signal. Thermally conductive adhesive is present between the encapsulation shell and the busbar.

9. The integrated busbar according to claim 4, characterized in that, At least one of the sampling elements is a voltage sampling element, a portion of which is disposed on one side of the flexible circuit board body, a portion of which protrudes from the outer edge of the flexible circuit board body, and the portion of which protrudes from the outer edge of the flexible circuit board body contacts the busbar. And / or, At least one of the sampling elements is a resistance sampling element, a portion of which is disposed on one side of the flexible circuit board body, a portion of which protrudes from the outer edge of the flexible circuit board body, and the portion of which protrudes from the outer edge of the flexible circuit board body contacts the busbar.

10. The integrated busbar according to claim 9, characterized in that, Each terminal of each battery cell is provided with a voltage sampling device and an internal resistance sampling device.

11. A battery module, characterized in that, Includes the integrated busbar according to any one of claims 1 to 10.

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