Battery cell sampling assembly, integrated busbar and battery pack

Abstract

The utility model discloses a cell sampling assembly, an integrated busbar and a battery pack, the cell sampling assembly comprises a flexible circuit board, and a temperature acquisition module and a voltage acquisition module which are integrated on the flexible circuit board, the flexible circuit board comprises a series circuit and an antenna module, and the series circuit is electrically connected with the temperature acquisition module and the voltage acquisition module; the antenna module and the serial connection line are arranged at intervals, and the antenna module is in communication connection with the temperature acquisition module and the voltage acquisition module and is used for transmitting sampling signals. Namely, the temperature acquisition module, the voltage acquisition module and the antenna module are integrally installed on the flexible circuit board, integration is realized, the number of components and the complexity of circuits can be reduced, the material cost and the assembly cost are reduced, the occupied space is reduced, and the overall cost is further reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field, especially a kind of electric core sampling subassembly, integrated busbar and battery pack. BACKGROUND

[0002] Power battery generally includes box and the multiple battery monomer of being set in box. In order to realize the monitoring (for example temperature sampling, voltage sampling, overcurrent fuse etc.) of battery, technical personnel designs BMS (Battery Management System, battery management system).

[0003] In relevant BMS technology, temperature acquisition module and voltage acquisition module are through the wire harness inside FPC (Flexible Printed Circuit, flexible circuit board) transmission information, it is through the method of wired connection transmission, lead to the wiring quantity numerous and complex, limit the installation space of other components. This not only increases the assembly difficulty and man-hour in production process, also prone to line misconnection, miss connection and other problems, influence production efficiency and product quality. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to propose a kind of electric core sampling subassembly, integrated busbar and battery pack, to solve the technical problem of higher manufacturing and installation cost of existing electric core sampling subassembly.

[0005] To achieve the above object, the utility model provides a kind of electric core sampling subassembly, including flexible circuit board and integrated on the temperature acquisition module and voltage acquisition module of the flexible circuit board, the flexible circuit board includes:

[0006] Serial connection line, with the temperature acquisition module and the voltage acquisition module electric connection;

[0007] Antenna module, with the serial connection line interval setting, and with the temperature acquisition module and the voltage acquisition module communication connection, for transmission sampling signal.

[0008] In some embodiments, the flexible circuit board includes body part and outer convex part, the outer convex part is located on both sides of the body part along the length direction of the body part, and the temperature acquisition module and the voltage acquisition module are located on the central axis in the width direction of the body part.

[0009] In some embodiments, the flexible circuit board includes substrate layer, and glue layer, circuit layer and circuit cover film layer are sequentially stacked and arranged on both sides of the substrate layer along the thickness direction of the substrate layer.

[0010] In some embodiments, the battery cell sampling assembly further comprises a temperature sensor, which is arranged on a surface of the flexible circuit board and electrically connected to the temperature acquisition module.

[0011] In some embodiments, the flexible circuit board further comprises a bending portion, which is connected to at least one side edge of the body portion, and a partition groove is formed between the bending portion and the body portion, and the temperature sensor is mounted on the bending portion.

[0012] In some embodiments, the battery cell sampling assembly further comprises a reinforcing plate, which is mounted on a side of the bending portion opposite to the temperature sensor.

[0013] In some embodiments, the flexible circuit board further comprises an enclosing portion and a filling layer, the enclosing portion encloses the temperature sensor, and the filling layer fills in the enclosing portion to seal the temperature sensor.

[0014] The utility model also provides a kind of integrated busbar of battery, including the battery cell sampling assembly and busbar as described above, and the voltage acquisition module is connected with the busbar.

[0015] In some embodiments, the battery cell sampling assembly is as described above, and the busbar is connected with the outer convex portion.

[0016] The utility model also provides a kind of battery pack, including the integrated busbar as described above.

[0017] The flexible circuit board provided in the application comprises a serial connection circuit and an antenna module, the serial connection circuit is electrically connected to the temperature acquisition module and the voltage acquisition module, the antenna module is arranged at intervals from the serial connection circuit and is communicatively connected to the temperature acquisition module and the voltage acquisition module, and is used to transmit a sampling signal. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure schematic view of one embodiment of the battery cell sampling assembly of the utility model;

[0019] Figure 2 It is a cross-sectional schematic view of one embodiment of the flexible circuit board of the utility model;

[0020] Figure 3 It is a structure schematic view of one embodiment of the battery cell sampling assembly of the utility model;

[0021] Figure 4It is a structure schematic view of the battery cell sampling assembly one embodiment of the utility model.

[0022] Figure 5 It is a structure schematic view of the integrated busbar one embodiment of the utility model.

[0023] Explanation of reference signs:

[0024] Reference Name Reference Name 100 Battery cell sampling assembly 10 Flexible circuit board 11 Temperature acquisition module 12 Voltage acquisition module 13 Serial connection circuit 14 Antenna module 101 Outer convex part 102 Base material layer 103 Adhesive layer 104 Circuit layer 105 Circuit cover film layer 15 Temperature sensor 16 Bending part 17 Partition groove 18 Reinforcing plate 19 Enclosure part 200 Integrated busbar 201 Busbar 106 Body part

[0025] The realization, functional features and advantages of the utility model will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0026] The scheme in the embodiments of the utility model will be clearly and completely described below in combination with the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only some of the embodiments in the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0028] It should also be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or can have a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or can have a middle element.

[0029] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of those skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0030] Please refer to Figure 1The utility model provides a kind of battery cell sampling assembly 100, including flexible circuit board 10 and integrated on flexible circuit board 10 temperature acquisition module 11 and voltage acquisition module 12, flexible circuit board 10 includes serial connection circuit 13 and antenna module 14, serial connection circuit 13 is electrically connected with temperature acquisition module 11 and voltage acquisition module 12;Antenna module 14 is spaced apart from serial connection circuit 13, and is connected with temperature acquisition module 11 and voltage acquisition module 12 communication, for transmission sampling signal.

[0031] Wherein, serial connection circuit 13 is used for transmission voltage acquisition module 12 and the electric signal that temperature acquisition module 11 is collected to.Meanwhile, serial connection circuit 13 provides stable power supply for voltage acquisition module 12.By serial connection circuit 13, power supply can be transmitted from the power supply end of system to each voltage acquisition module 12, provides necessary working voltage for its internal electronic component, so that it can stably operate, avoids the measurement error or module failure caused by unstable power supply.Serial connection circuit 13 can also be used as the transmission channel of voltage signal, and the voltage signal of battery cell is accurately transmitted from voltage acquisition point to voltage acquisition module 12.

[0032] In the embodiment, through serial connection circuit 13, voltage acquisition of different positions of battery cell can be conveniently realized.Multiple voltage acquisition modules 12 can be connected in turn along serial connection circuit 13, and voltage measurement is carried out on different parts of battery cell, so that voltage distribution of each battery cell in battery pack is comprehensively understood.

[0033] Antenna module 14 is spaced apart from serial connection circuit 13, guarantees the independence and stability of signal transmission.When voltage acquisition module 12 and temperature acquisition module 11 obtain voltage and temperature signal respectively, these signals are converted into format suitable for wireless transmission, and then sent out through antenna module 14, and receiving end can receive these sampling signals and carry out corresponding processing.Wireless communication connection of antenna module 14 avoids the problems such as poor contact, line aging that may occur in traditional wired connection, further improves the reliability and stability of signal transmission, so as to improve the precision of sampling.

[0034] Wherein, antenna module 14 can be printed antenna or microstrip antenna, for example, printed antenna is directly formed by printing technology such as screen printing, inkjet printing on the dielectric substrate of flexible circuit board 10 with conductive material (such as copper, silver, etc.).This is only exemplary, and the present application is not limited here.

[0035] In the embodiment, multiple temperature acquisition modules 11 and voltage acquisition modules 12 are installed on the outer surface of flexible circuit board 10, and multiple point sampling can be carried out on battery cell at different positions, so that temperature and voltage distribution of battery cell can be more comprehensively and accurately reflected, and error and inaccuracy caused by single point sampling are avoided.

[0036] The application integrates the temperature acquisition module 11, the voltage acquisition module 12 and the antenna module 14 on the flexible circuit board 10, realizes integration, reduces the number of components and the complexity of the circuit, thereby reducing the material cost and the assembly cost, and helps to reduce the space occupation, and further reduces the overall cost.

[0037] Please continue to refer to Figure 1 In some embodiments, the flexible circuit board 10 includes a body part 106 and an outer protruding part 101, the outer protruding part 101 is arranged on both sides of the body part 106 along the length direction of the body part 106, and the temperature acquisition module 11 and the voltage acquisition module 12 are arranged on the central axis in the width direction of the body part 106.

[0038] The temperature acquisition module 11 and the voltage acquisition module 12 are arranged on the central axis in the width direction of the body part 106, which is conducive to more stable acquisition of the temperature and voltage signals of the battery cell, because the central axis in the width direction of the body part 106 is less affected by external interference factors (such as edge electromagnetic interference, mechanical vibration, etc.), a relatively stable signal acquisition environment can be provided, thereby improving the accuracy of the acquired signal.

[0039] It should be noted that the temperature acquisition module 11 and the voltage acquisition module 12 are arranged on the central axis in the width direction of the body part 106, which can be arranged near the central axis in the width direction of the body part 106.

[0040] In the embodiment, the outer protruding part 101 serves as a connection point, which is convenient for physical connection with the electrical connection sheet (such as busbar) in the battery pack, for example, by welding, crimping or the like, the flexible circuit board 10 is connected with the external electrical connection sheet. When the outer protruding part 101 is successfully connected with the electrical connection sheet, the voltage acquisition module 12 can obtain the voltage signal on the electrical connection sheet through the electrical path between the outer protruding part 101 and the electrical connection sheet.

[0041] The outer protruding part 101 is arranged on both sides of the body part 106 in the embodiment, which avoids mutual interference with the temperature acquisition module 11 and the voltage acquisition module 12 arranged on the central axis in the width direction of the body part 106, so that the functional division of the flexible circuit board 10 is more reasonable, and it is also convenient for layout and installation in the limited space of the battery pack and the like.

[0042] In this embodiment, the presence of the outward protrusion 101 makes the flexible circuit board 10 more flexible and efficient when connecting external components, and can increase the number of connection points without increasing the overall area of the flexible circuit board 10. This helps to improve the integration of the entire battery system, allowing more functions to be integrated in a relatively compact space. For example, in the battery pack of an electric vehicle, this design can allow various sensors, controllers, and other components of the battery management system to be more closely integrated with the cell sampling assembly 100, saving space and facilitating wiring and maintenance.

[0043] Please refer to Figure 2 The flexible circuit board 10 includes a substrate layer 102, and a glue layer 103, a circuit layer 104, and a circuit cover film layer 105 sequentially stacked on both sides of the substrate layer 102 in the thickness direction of the substrate layer 102.

[0044] The substrate layer 102 is the core support part of the flexible circuit board 10, which is usually made of materials with good flexibility, such as polyimide (PI) film. Polyimide has high insulation, high temperature resistance, chemical corrosion resistance and other excellent properties, which enables the flexible circuit board 10 to maintain stable performance in different environmental conditions, such as temperature changes, electrolyte leakage, etc. during battery operation. The polyimide substrate layer 102 can effectively resist these adverse factors and prevent short circuits and other problems.

[0045] The glue layer 103 is located on both sides of the substrate layer 102 and plays a bonding role. It tightly bonds the circuit layer 104 and the substrate layer 102 together. The material of the glue layer 103 is usually glue with good bonding and electrical insulation properties, such as adipic acid dihydrazide adhesive. Its good adhesion ensures that the circuit layer 104 will not easily fall off under conditions such as bending, folding, etc. of the flexible circuit board 10, ensuring the integrity of the circuit. At the same time, the insulation property can prevent short circuits between circuits and ensure normal signal transmission.

[0046] The circuit layer 104 is the key part of electrical connection. It contains the series connection circuit 13 mentioned above, and the circuit connected to the temperature acquisition module 11 and the voltage acquisition module 12. The circuit layer 104 is usually made by etching, printing, etc. on a copper foil or other conductive material.

[0047] The circuitry cover film layer 105 is located at the outermost layer, mainly to protect the circuit layer 104. It can prevent the circuit layer 104 from being physically damaged, such as scratching, wear and tear, etc. At the same time, the circuitry cover film layer 105 also has certain insulation performance, further enhancing the safety of the circuit. The material of the cover film layer can be polyimide or other insulating materials, and its flexibility also matches the characteristics of the entire flexible circuit board 10, ensuring the protection function while not affecting the bendability of the circuit board.

[0048] In this embodiment, the design of this multi-layer structure enables the flexible circuit board 10 to have both flexibility and durability. The material selection of the substrate layer 102 and the circuitry cover film layer 105, as well as their cooperation with the intermediate adhesive layer 103 and the circuit layer 104, enables the circuit board to be bent and folded to a certain extent without damaging the circuit. For example, during the assembly of the battery pack, the flexible circuit board 10 can be appropriately bent according to the shape and layout of the battery cell to better fit the battery cell surface for sampling, and in the long-term use process, it can withstand the mechanical stress and environmental changes inside the battery to ensure the service life.

[0049] In some embodiments, the battery cell sampling assembly 100 also includes a temperature sensor 15, which is arranged on the surface of the flexible circuit board 10 and electrically connected to the temperature acquisition module 11.

[0050] Among them, the temperature sensor 15 is a key element for sensing the temperature of the battery cell. It detects temperature changes based on specific physical principles. For example, the commonly used thermistor temperature sensor 15, whose resistance value will change significantly with temperature. When the temperature of the battery cell rises or falls, the resistance of the thermistor decreases or increases accordingly.

[0051] The temperature sensor 15 is electrically connected to the temperature acquisition module 11, which enables the temperature sensor 15 to transmit the sensed temperature signal (in the form of resistance change, etc.) to the temperature acquisition module 11. The internal circuit of the temperature acquisition module 11 will amplify, filter and process the signal transmitted by the sensor. For example, for weak resistance change signals, a suitable amplification circuit is used to amplify them to a level that can be recognized and processed by the subsequent circuit. Then, after filtering to remove interference signals, it ensures that the collected temperature signal is true and accurate.

[0052] In this embodiment, by arranging the temperature sensor 15 directly on the surface of the flexible circuit board 10, accurate monitoring of the temperature of the battery cell can be achieved. This close combination reduces signal transmission loss and delay, enabling the temperature acquisition module 11 to quickly and accurately obtain the real-time temperature of the battery cell.

[0053] In addition, the temperature sensor 15 is arranged on the surface of the flexible circuit board 10, and the temperature sensor 15 and the temperature acquisition module 11 jointly constitute a relatively compact temperature monitoring system. The integrated design improves the space utilization of the whole battery cell sampling assembly 100, and also makes the temperature monitoring function more stable and reliable. Compared with the traditional distributed temperature monitoring mode, the signal error caused by the long connection line or unreliable connection is reduced, and efficient temperature monitoring can be realized in the limited battery space.

[0054] Please refer to Figure 3 In some embodiments, the flexible circuit board 10 further comprises a bending portion 16 connected to at least one side edge of the body portion 106, and a partition groove 17 is arranged between the bending portion 16 and the body portion 106, and the temperature sensor 15 is arranged on the bending portion 16.

[0055] The partition groove 17 separates the bending portion 16 from the body portion 106, and the main purpose is to reduce the influence on the body portion 106 during the bending process. When the bending portion 16 is bent, due to the existence of the partition groove 17, the stress is mainly concentrated in the bending portion 16 region, and will not easily transmit to other parts of the flexible circuit board 10, such as the area where the circuit layer 104 is dense or the position where the temperature acquisition module 11 is located, so that different parts can move relatively independently and avoid mutual interference.

[0056] The temperature sensor 15 is arranged on the bending portion 16, which is conducive to better sensing temperature changes. The bending portion 16 is usually closer to the battery cell or other heat sources because it is structurally located at the edge. For example, in a battery pack, the heat generated by the battery cell will spread around, and the bending portion 16 can contact these heat more quickly and directly due to its advantageous position, so that the temperature sensor 15 can more sensitively detect temperature changes. At the same time, placing the temperature sensor 15 on the bending portion 16 also avoids occupying too much space on the body portion 106, which is conducive to the layout of other components (such as the voltage acquisition module 12, the series connection circuit 13, etc.) on the circuit board.

[0057] In this embodiment, the bending portion 16 is isolated from the body portion 106 by the partition groove 17, which can effectively protect the integrity of the flexible circuit board 10. Under the action of frequent bending operation or external mechanical stress, the bending portion 16 may be deformed to some extent, but due to the buffering effect of the partition groove 17, this deformation will not cause serious damage to the electrical performance and physical structure of the main body of the flexible circuit board 10. For example, even if the circuit of the bending portion 16 is slightly broken after multiple bending, it will not affect the signal transmission and temperature and voltage acquisition functions of the body portion 106.

[0058] In addition, the temperature sensor 15 is located at the bending portion 16, which can improve the accuracy of temperature detection. As mentioned above, the bending portion 16 is closer to the heat source, and can capture the temperature change more timely. This layout enables the temperature sensor 15 to be independent of other electrical activities of the body portion 106, reducing the influence of electromagnetic interference and other factors on temperature detection.

[0059] Please refer to Figure 4 In some embodiments, the battery cell sampling assembly 100 further comprises a reinforcing plate 18, which is installed on the side of the bending portion 16 facing away from the temperature sensor 15.

[0060] During the bending process, the bending portion 16 will be subjected to tensile or compressive forces. Without the reinforcing plate 18, these forces are likely to concentrate at the connection site of the temperature sensor 15 and the flexible circuit board 10. However, the presence of the reinforcing plate 18 enables the stress to be dispersed from the connection site to the entire area of the reinforcing plate 18. For example, assuming that the bending portion 16 is subjected to a pressure perpendicular to the plane of the circuit board, the reinforcing plate 18 will act like a support structure to evenly distribute this pressure over the area it covers, thereby reducing the local pressure at the connection point of the temperature sensor 15. This can effectively prevent problems such as loose solder joints, component damage, or delamination from the flexible circuit board 10 due to excessive stress on the temperature sensor 15.

[0061] In this embodiment, the presence of the reinforcing plate 18 greatly improves the reliability of the temperature sensor 15 during the bending process. In the long-term use, especially in the case of frequent bending of the flexible circuit board 10, the temperature sensor 15 can maintain a stable working state. Moreover, the reinforcing plate 18 helps to prolong the service life of the entire flexible circuit board 10 and temperature sensor 15 assembly. It reduces the frequency of repairing or replacing the flexible circuit board 10 due to the failure of the temperature sensor 15, and reduces the use cost.

[0062] Please continue to refer to Figure 3 In some embodiments, the flexible circuit board 10 further comprises a surrounding portion 19 and a filling layer, the surrounding portion 19 surrounds the temperature sensor 15, and the filling layer fills the surrounding portion 19 for sealing the temperature sensor 15.

[0063] The enclosure part 19 encloses the temperature sensor 15 and mainly plays a positioning and isolation role. The enclosure part 19 can accurately determine the position of the temperature sensor 15 and prevent displacement of the temperature sensor 15 when the flexible circuit board 10 is subjected to external forces (such as vibration and slight collision). For example, during transportation or daily use of the battery pack, the jolting of the vehicle or the shaking of the equipment can cause displacement of the components, and the enclosure part 19 can firmly fix the temperature sensor 15 at the preset position. Moreover, the enclosure part 19 can isolate the temperature sensor 15 from other elements around or the external environment, avoid interference (such as electromagnetic interference) of other elements, and also prevent impurities such as dust and moisture in the external environment from contacting the temperature sensor 15.

[0064] The filling layer can fill the small gap between the temperature sensor 15 and the enclosure part 19 and form a relatively closed environment. On the one hand, it can further enhance the isolation effect and prevent harmful factors such as moisture and corrosive gas in the external environment from invading the inside of the temperature sensor 15, thereby protecting the electrical performance and physical structure of the temperature sensor 15. For example, in some environments with high humidity, the sealed filling layer can prevent water vapor from condensing on the surface of the temperature sensor 15, thereby avoiding damage to the sensor due to short circuit or corrosion. On the other hand, the filling layer can also play a buffering role and absorb external impact to a certain extent, thereby reducing damage to the temperature sensor 15.

[0065] In the embodiment, the combination of the enclosure part 19 and the filling layer significantly improves the stability of the temperature sensor 15, so that the temperature sensor 15 can work in a relatively stable physical and chemical environment, reduces interference of external factors on the performance of the temperature sensor 15, and thus makes the data collected by the temperature sensor 15 more accurate and reliable. Moreover, the service life of the temperature sensor 15 can be effectively prolonged, and the maintenance cost and replacement frequency are reduced.

[0066] In some embodiments, the filling layer can be glue, and the glue is filled in the enclosure part 19 to form the filling layer, thereby sealing the temperature sensor 15. Of course, this is only an example, and other forms can also be used, which are not limited in the embodiment of the application.

[0067] Please refer to Figure 5 The utility model discloses still provide a kind of integrated busbar 200 of battery, including battery cell sampling assembly 100 and busbar 201, voltage acquisition module 12 is connected with busbar 201.

[0068] The battery sampling assembly 100 is responsible for collecting the temperature, voltage and other key parameters of the battery cell, and the busbar 201 plays a role in collecting the current, and the currents of multiple battery cells are collected to facilitate subsequent power transmission or utilization. The voltage collection module 12 is connected with the busbar 201, which makes it possible to directly obtain the voltage information output by the battery cell from the busbar 201, so that the voltage condition of each battery cell in the entire battery system can be monitored more conveniently and accurately.

[0069] The busbar 201 is generally made of metal materials (such as copper) with good electrical conductivity, and the positive and negative electrodes of multiple battery cells are connected with the corresponding connection parts of the busbar 201. When the battery cell discharges or charges, the current flows out of or into the battery cell, and is collected on the busbar 201 through the respective connection points, realizing the centralized transmission of the current.

[0070] In some embodiments, the busbar 201 is connected with the outer protrusion 101.

[0071] The busbar 201 is connected with the outer protrusion 101 formed on both sides of the flexible circuit board 10 along the length direction, forming an electrical connection path. This connection mode enables the busbar 201 to realize close electrical interaction with the battery sampling assembly 100 through the outer protrusion 101.

[0072] When the busbar 201 is connected with the outer protrusion 101, the current flows between the battery cell, the battery sampling assembly 100 and the busbar 201 during the charging and discharging process of the battery. Specifically, during discharging, the current output by the battery cell first passes through the battery sampling assembly 100, and then flows to the busbar 201 through the outer protrusion 101, and the busbar 201 transmits the collected current to the external load; during charging, the input current from the outside first enters the busbar 201, and then flows into the battery sampling assembly 100 through the outer protrusion 101, and is then distributed to each battery cell, thereby realizing the charging and discharging cycle of the entire battery system.

[0073] In this embodiment, the connection mode of the busbar 201 and the outer protrusion 101 makes the structure of the entire battery system more compact. Compared with other possible connection modes, using the outer protrusion 101 as a connection point reduces the additional connection lines and complex wiring structure, making the connection between the battery sampling assembly 100 and the busbar 201 more simple and direct, facilitating the layout and installation in the limited battery space, and also reducing the difficulty and complexity of assembly.

[0074] The utility model also provides a kind of battery pack, including integrated busbar. Since the above integrated busbar all technical solutions of all embodiments are used, the battery pack of the present application also at least has all beneficial effects brought by the technical solutions of the above integrated busbar embodiments, which will not be repeated here.

[0075] The above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or variations can be made. Here, all the embodiments cannot be exhausted. Any obvious changes or variations derived from the technical scheme of the utility model still fall within the protection scope of the utility model.

Claims

1. A cell sampling assembly, characterized in that, The circuit board includes a flexible circuit board and a temperature acquisition module and a voltage acquisition module integrated on the flexible circuit board. The flexible circuit board includes: A series connection is provided, which is electrically connected to the temperature acquisition module and the voltage acquisition module. An antenna module is spaced apart from the serial line and is communicatively connected to the temperature acquisition module and the voltage acquisition module for transmitting sampling signals.

2. The cell sampling assembly according to claim 1, characterized in that, The flexible circuit board includes a main body and an outward protrusion. The outward protrusion is located on both sides of the main body along its length. The temperature acquisition module and the voltage acquisition module are located on the central axis of the main body in its width direction.

3. The cell sampling assembly according to claim 1, characterized in that, The flexible circuit board includes a substrate layer, and an adhesive layer, a circuit layer, and a circuit cover film layer that are sequentially stacked on both sides of the substrate layer along the thickness direction of the substrate layer.

4. The cell sampling assembly according to claim 2, characterized in that, The cell sampling assembly also includes a temperature sensor, which is disposed on the surface of the flexible circuit board and electrically connected to the temperature acquisition module.

5. The cell sampling assembly according to claim 4, characterized in that, The flexible circuit board further includes a bending portion, which is connected to at least one edge of the main body, and a partition groove is formed between the bending portion and the main body, and the temperature sensor is installed in the bending portion.

6. The cell sampling assembly according to claim 5, characterized in that, The cell sampling assembly also includes a reinforcing plate, which is installed on the side of the bent portion that faces away from the temperature sensor.

7. The cell sampling assembly according to claim 6, characterized in that, The flexible circuit board also includes a barrier portion and a filling layer, the barrier portion surrounding the temperature sensor; the filling layer filling the barrier portion to seal the temperature sensor.

8. An integrated busbar for a battery, characterized in that, Includes the cell sampling assembly and bus as described in any one of claims 1 to 7, wherein the voltage acquisition module is connected to the bus.

9. An integrated busbar for a battery, characterized in that, Includes the cell sampling assembly and bus as described in claim 2, wherein the voltage acquisition module is connected to the bus, and the bus is connected to the external protrusion.

10. A battery pack, characterized in that, Includes the integrated busbar as described in claim 8 or 9.

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