Battery cell sampling assembly, battery module, battery device and vehicle

Abstract

The utility model discloses a battery cell sampling assembly, a battery module, a battery device and a vehicle. The battery cell sampling assembly comprises an acquisition element, a flexible circuit board, a reinforcing circuit board and an electric connector, the acquisition element is correspondingly connected with the plurality of battery cells, and the acquisition element is used for acquiring battery data of each battery cell; the flexible circuit board is electrically connected with the acquisition element, and the flexible circuit board is used for receiving and transmitting battery data acquired by the acquisition element; the reinforcing circuit board is fixed to the side, away from the battery cell, of the flexible circuit board and electrically connected with the flexible circuit board, the reinforcing circuit board is used for receiving battery data collected by the collecting element through the flexible circuit board, and the structural strength of the reinforcing circuit board is larger than that of the flexible circuit board; and the electric connector is electrically connected with the reinforcing circuit board and is used for being electrically connected with a battery management system. Therefore, support and protection can be provided for the flexible circuit board through the reinforcing circuit board, the flexible circuit board can transmit battery data to a battery management system conveniently, and the risk of damage to the flexible circuit board is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a cell sampling assembly, a battery module, a battery device, and a vehicle. Background Technology

[0002] Energy conservation and emission reduction are key to sustainable development, which in turn promotes the adjustment of the energy structure and drives the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology. Due to its advantages such as high energy density, good cycle capability, high operating voltage, environmental friendliness, and low self-discharge, it has been widely used in portable electronics, electric vehicles, and energy storage systems.

[0003] During battery use, the working status of the battery cells needs to be collected and monitored through a cell sampling component. Existing cell sampling components often collect battery data through the transmission of a single-layer flexible circuit board. The structural strength of a single-layer flexible circuit board is poor, and the risk of damage is high. Utility Model Content

[0004] The main objective of this application is to provide a cell sampling assembly, a battery module, a battery device, and a vehicle, aiming to solve the aforementioned technical problems existing in the prior art.

[0005] To address the aforementioned issues, this application provides a battery cell sampling assembly, comprising a sampling element, a flexible circuit board, a reinforcing circuit board, and an electrical connector. The sampling element is connected to multiple battery cells and is used to collect battery data from each cell. The flexible circuit board is electrically connected to the sampling element and is used to transmit and receive the battery data collected by the sampling element. The reinforcing circuit board is fixed to the side of the flexible circuit board away from the battery cells and is electrically connected to the flexible circuit board. The reinforcing circuit board is used to receive the battery data collected by the sampling element through the flexible circuit board, and the structural strength of the reinforcing circuit board is greater than that of the flexible circuit board. The electrical connector is electrically connected to the reinforcing circuit board and is used to connect to a battery management system.

[0006] In some embodiments, the reinforcing circuit board is a multilayer printed circuit board.

[0007] In some embodiments, the data acquisition element includes multiple data acquisition interfaces, one data acquisition interface is connected to a corresponding battery cell, and each data acquisition interface is electrically connected to a flexible circuit board.

[0008] In some embodiments, the flexible circuit board includes a main body and a plurality of electrical connection lines disposed on the main body. One end of each electrical connection line is connected to a data acquisition interface, and the other end is connected to a reinforcing circuit board. The plurality of electrical connection lines are spaced apart from each other.

[0009] In some embodiments, the flexible circuit board extends in a first direction; a plurality of the battery cells are arranged sequentially in the first direction to form a battery cell group, the battery cell group having a first end and a second end in the first direction, the plurality of electrical connection lines including a plurality of first connection lines and two second connection lines, each of the acquisition interfaces being electrically connected to one of the first connection lines, the acquisition interface connected to the battery cell at the first end being a first interface, the acquisition interface connected to the battery cell at the second end being a second interface, one of the second connection lines being electrically connected to the first interface, and the other of the second connection lines being electrically connected to the second interface.

[0010] In some embodiments, the reinforcing circuit board is located at either the first end or the second end.

[0011] In some embodiments, multiple acquisition interfaces are divided into a first column and a second column. The first column and the second column are located on both sides of the flexible circuit board in a second direction perpendicular to the first direction. Multiple acquisition interfaces in the first column are arranged sequentially in the first direction, and multiple acquisition interfaces in the second column are arranged sequentially in the first direction.

[0012] To address the aforementioned issues, this application provides a battery module comprising multiple battery cells and the aforementioned battery cell sampling assembly, wherein the battery cell sampling assembly is electrically connected to the multiple battery cells respectively.

[0013] To address the aforementioned issues, this application provides a battery device comprising a housing, a battery management system, and the aforementioned battery module. The housing has an accommodating space, and the battery module and battery management system are disposed within the accommodating space. The battery management system is electrically connected to the cell sampling component of the battery module.

[0014] To address the aforementioned problems, this application provides a vehicle that includes the aforementioned battery device.

[0015] Compared with existing technologies, the battery cell sampling assembly provided in this application includes a sampling element, a flexible circuit board, a reinforcing circuit board, and an electrical connector. The sampling element is connected to multiple battery cells and is used to collect battery data from each cell. The flexible circuit board is electrically connected to the sampling element and is used to transmit and receive the battery data collected by the sampling element. The reinforcing circuit board is fixed to the side of the flexible circuit board away from the battery cells and is electrically connected to the flexible circuit board. The reinforcing circuit board is used to receive the battery data collected by the sampling element through the flexible circuit board, and the structural strength of the reinforcing circuit board is greater than that of the flexible circuit board. The electrical connector is electrically connected to the reinforcing circuit board and is used to connect to the battery management system. Through the above implementation, the reinforcing circuit board is fixedly connected to the flexible circuit board, providing support and protection for the flexible circuit board. The flexible circuit board is electrically connected to the electrical connector through the reinforcing circuit board, thereby facilitating the transmission of battery data from the flexible circuit board to the battery management system through the reinforcing board and the electrical connector, reducing the risk of damage to the flexible circuit board. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a vehicle according to one or more embodiments of this application;

[0018] Figure 2 This is a first structural schematic diagram of a battery device according to one or more embodiments of this application;

[0019] Figure 3 This is a second structural schematic diagram of a battery device according to one or more embodiments of this application;

[0020] Figure 4 This is a schematic diagram of the structure of a battery module according to one or more embodiments of this application;

[0021] Figure 5 This is a schematic diagram of the structure of a cell sampling assembly according to one or more embodiments of this application.

[0022] Reference numerals: Vehicle 1; Battery unit 2; Housing 200; First part 210; Second part 220; Accommodation space 230; Controller 3; Motor 4; Battery module 5; Cell 51; First end 52; Second end 53; Battery management system 6; Cell sampling assembly 10; Acquisition element 11; Acquisition interface 111; First interface 1111; Second interface 1112; First column 112; Second column 113; Flexible circuit board 12; Main body 121; Electrical connection line 122; First connection line 1221; Second connection line 1222; Reinforcing circuit board 13; Electrical connector 14; First direction x1; Second direction x2. Detailed Implementation

[0023] 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.

[0024] 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 pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0025] In the description of the embodiments of this application, technical terms such as "first" and "second" 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.

[0026] 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.

[0027] 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 have an "or" relationship.

[0028] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0029] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0030] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0031] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0032] Batteries, as discussed in this field, can be categorized into primary batteries and rechargeable batteries based on whether they are rechargeable. Primary batteries, also known as "use-and-discard" batteries or galvanic cells, cannot be recharged after their charge is depleted and must be discarded. Rechargeable batteries, also called secondary batteries or rechargeable batteries, differ from primary batteries in their manufacturing materials and processes. Their advantage lies in their ability to be cycled multiple times after charging, and their output current capacity is higher than most primary batteries. Common types of rechargeable batteries include lead-acid batteries, nickel-metal hydride batteries, and lithium-ion batteries. Lithium-ion batteries are lightweight, have a large capacity (1.5 to 2 times that of a nickel-metal hydride battery of the same weight), no memory effect, and a very low self-discharge rate, thus enjoying widespread use despite their relatively high price. Lithium-ion batteries are also widely used in pure electric vehicles and hybrid vehicles. While the capacity of lithium-ion batteries used in these applications is relatively lower, they offer a larger output and charging current, and a longer lifespan, but at a higher cost.

[0033] The batteries described in the embodiments of this application refer to rechargeable batteries or disposable batteries. The embodiments disclosed in this application will be described below primarily using lithium-ion batteries as an example. It should be understood that the embodiments disclosed in this application are applicable to any other suitable type of rechargeable battery. The batteries mentioned in the embodiments disclosed in this application can be directly or indirectly used in suitable devices to power those devices.

[0034] Please refer to Figure 1 , Figure 1 This is a structural schematic diagram of a vehicle according to one or more embodiments of this application.

[0035] This application provides a vehicle 1, which includes a battery device 2. The vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. The battery device 2 is installed inside the vehicle 1, and can be located at the bottom, front, or rear of the vehicle 1. The battery device 2 can be used to power the vehicle 1; for example, the battery device 2 can serve as the operating power source for the vehicle 1. The vehicle 1 may also include a controller 3 and a motor 4. The controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, to meet the power needs of the vehicle 1 during starting, navigation, and driving.

[0036] In some embodiments of this application, the battery device 2 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0037] To improve vehicle performance, this application also provides a battery device, see [link to relevant documentation]. Figures 2-3 , Figure 2 This is a first structural schematic diagram of a battery device according to one or more embodiments of this application; Figure 3 This is a second structural schematic diagram of a battery device according to one or more embodiments of this application.

[0038] The shape of the battery device 2 may include, but is not limited to, a square, cylindrical or other arbitrary shapes.

[0039] In some embodiments, the battery device 2 may include a housing 200 and a battery module 5, the battery module 5 being housed within the housing 200. The housing 200 provides a accommodating space 230 for the battery module 5, and the housing 200 may employ various structures. In some embodiments, the housing 200 may include a first portion 210 and a second portion 220, the first portion 210 and the second portion 220 overlapping each other, the first portion 210 and the second portion 220 together defining the accommodating space 230 for accommodating the battery module 5. The second portion 220 may be a hollow structure with one end open, and the first portion 210 may be a plate-like structure, the first portion 210 overlapping the open side of the second portion 220 so that the first portion 210 and the second portion 220 together define the accommodating space 230; the first portion 210 and the second portion 220 may also both be hollow structures with one side open, the open side of the first portion 210 overlapping the open side of the second portion 220.

[0040] In the battery device 2, there can be multiple battery modules 5, which can be connected in series, parallel, or in a hybrid configuration. A hybrid configuration means that multiple battery modules 5 are connected in both series and parallel configurations. Multiple battery modules 5 can be directly connected in series, parallel, or in a hybrid configuration together, and then the entire assembly of the multiple battery modules 5 is housed within the housing 200. The battery device 2 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery modules 5.

[0041] In some embodiments, the battery device 2 further includes a battery management system 6, which is electrically connected to the battery module 5. The battery management system 6 (BMS) significantly impacts the safe operation of the electric vehicle 1, the selection of vehicle control strategies, the selection of charging modes, and operating costs. Whether the vehicle 1 is running or charging, the battery management system 6 performs real-time monitoring and fault diagnosis of the battery system's status, and informs the vehicle controller 3 or charger via a bus to adopt appropriate control strategies for effective and efficient use of the battery system. In this embodiment, the battery management system 6 can be electrically connected to one battery module 5 or multiple battery modules 5 simultaneously. This allows the battery management system 6 to simultaneously monitor the temperature, voltage, and module current of multiple battery modules 5, and perform battery balancing control and fault diagnosis, etc. Thus, the battery management system 6 can provide control signals to the battery modules 5, enabling targeted management of the battery module 5's operating status based on its detection information.

[0042] Combination Figure 4 , Figure 4 This is a schematic diagram of the structure of a battery module according to one or more embodiments of this application.

[0043] This application also provides a battery module 5, which includes a plurality of battery cells 51 and a battery cell sampling component 10. The battery cell sampling component 10 is electrically connected to the plurality of battery cells 51 respectively, and is used to collect battery data of the plurality of battery cells 51.

[0044] Combination Figures 4-5 , Figure 5 This is a schematic diagram of the structure of a cell sampling assembly according to one or more embodiments of this application.

[0045] To address the aforementioned issues, this application provides a battery cell sampling assembly 10. The battery cell sampling assembly 10 includes a sampling element 11, a flexible circuit board 12, a reinforcing circuit board 13, and an electrical connector 14. The sampling element 11 is connected to multiple battery cells 51 and is used to collect battery data from each battery cell 51. The flexible circuit board 12 is electrically connected to the sampling element 11 and is used to transmit and receive the battery data collected by the sampling element 11. The reinforcing circuit board 13 is fixed to the side of the flexible circuit board 12 away from the battery cells 51 and is electrically connected to the flexible circuit board 12. The reinforcing circuit board 13 is used to receive the battery data collected by the sampling element 11 through the flexible circuit board 12. The structural strength of the reinforcing circuit board 13 is greater than that of the flexible circuit board 12. The electrical connector 14 is electrically connected to the reinforcing circuit board 13 and is used to electrically connect to the battery management system 6.

[0046] The data acquisition element 11 is connected to multiple battery cells 51. It can be understood that the data acquisition element 11 can be connected to each battery cell 51 individually. For example, taking seventeen battery cells 51 as an example, the data acquisition element 11 can be individually connected to each of the seventeen battery cells 51, thereby facilitating the acquisition of battery data from each battery cell 51 connected to the data acquisition element 11. Battery data may include status signals, where status signals refer to the state information exhibited on the battery cell, such as temperature signals, voltage signals, and pressure signals. The flexible circuit board 12 can be a single-layer flexible circuit board (FPC), which has lower cost. The flexible circuit board 12 has better flexibility, thus better adapting to the dimensional changes of the battery cells 51 caused by temperature variations. The flexible circuit board 12 is electrically connected to the data acquisition element 11 and receives the battery data acquired by the data acquisition element 11. The flexible circuit board 12 is fixedly connected to the reinforcing circuit board 13, thereby enabling the flexible circuit board 12 to transmit the battery data received from the data acquisition element 11 to the reinforcing circuit board 13. The reinforcing circuit board 13 is fixed to the side of the flexible circuit board 12 facing away from the battery cell 51 and is electrically connected to the flexible circuit board 12. The reinforcing circuit board 13 can be a printed circuit board (PCB), and its material can be, but is not limited to, resin. The reinforcing circuit board 13 has stronger structural strength than the flexible circuit board 12, thereby providing support and protection for the flexible circuit board 12 and reducing the risk of damage to the flexible circuit board 12. The connection method between the reinforcing circuit board 13 and the flexible circuit board 12 can include, but is not limited to, soldering. For example, the reinforcing circuit board 13 can be soldered to the flexible circuit board 12 using a reflow soldering process. Specifically, a fixing pad can be set between the reinforcing circuit board 13 and the flexible circuit board 12 to improve the connection stability between the reinforcing circuit board 13 and the flexible circuit board 12. In some application scenarios, a short-circuit fuse is also provided on the reinforcing circuit board 13. It is understood that when a short circuit or other fault occurs in the flexible circuit board 12, the short-circuit fuse on the reinforcing circuit board 13 will blow, thereby protecting the flexible circuit board 12. Only the short-circuit fuse needs to be replaced for repair, further mitigating the risk of damage to the flexible circuit board 12 and reducing maintenance costs. Electrical connector 14 can be, but is not limited to, board-to-board connectors. Electrical connector 14 is electrically connected to reinforcing circuit board 13 and is also used for electrical connection to battery management system 6. Electrical connector 14 can receive battery data from reinforcing circuit board 13 and transmit it to battery management system 6, enabling battery management system 6 to manage and monitor multiple battery cells 51. In some applications, electrical connector 14 can be electrically connected to the battery subordination unit (BSU) of battery management system 6.It should be noted that by connecting the reinforcing circuit board 13 to the electrical connector 14, the flexible circuit board 12 does not need to be directly connected to the electrical connector 14, thus mitigating the risk of damage to the flexible circuit board 12 due to poor connection between the flexible circuit board 12 and the electrical connector 14.

[0047] Through the above implementation, the reinforcing circuit board 13 is fixedly connected to the flexible circuit board 12, and the reinforcing circuit board 13 can provide support and protection for the flexible circuit board 12. The flexible circuit board 12 is electrically connected to the electrical connector 14 through the reinforcing circuit board 13, which facilitates the flexible circuit board 12 to transmit battery data to the battery management system 6 through the reinforcing board and the electrical connector 14, and reduces the risk of damage to the flexible circuit board 12.

[0048] In some embodiments, the reinforcing circuit board 13 is a multilayer printed circuit board. It should be noted that a multilayer printed circuit board has multiple alternating conductive and insulating layers, giving it strong layer-switching capability. Layer-switching capability refers to the ability of a multilayer printed circuit board to maintain signal integrity and reliability when switching from one conductive layer to another during signal transmission. It is understood that single-layer flexible circuit boards have poor layer-switching capability. By electrically connecting a multilayer printed circuit board to a single-layer flexible circuit board, battery data transmitted on the flexible circuit board 12 can be transmitted to the electrical connector 14 through different conductive layers of the multilayer printed circuit board. This allows battery data from different cells 51 collected by the acquisition element 11 to be transmitted to different pins of the electrical connector 14, improving the flexibility of battery data transmission by the cell 51 sampling element.

[0049] In some embodiments, the acquisition element 11 includes multiple acquisition interfaces 111, each acquisition interface 111 being connected to a corresponding battery cell 51, and each acquisition interface 111 being electrically connected to the flexible circuit board 12. The acquisition interface 111 can be a nickel plate, on which a sensor, such as a negative temperature coefficient thermistor (NTC), can be mounted. It is understood that since one acquisition interface 111 is connected to one battery cell 51, battery data from multiple battery cells 51 can be acquired independently through multiple acquisition interfaces 111. This independent acquisition of battery data by different acquisition interfaces 111 reduces the risk of crosstalk during acquisition, improves the reliability of the battery cell sampling assembly 10, and increases acquisition efficiency. Each acquisition interface 111 is electrically connected to the flexible circuit board 12, facilitating the flexible circuit board 12 to receive the battery data acquired by each acquisition interface 111.

[0050] In some embodiments, the flexible circuit board 12 includes a main body 121 and a plurality of electrical connection lines 122 disposed on the main body 121. One end of each electrical connection line 122 is connected to a data acquisition interface 111, and the other end is connected to a reinforcing circuit board 13. The plurality of electrical connection lines 122 are spaced apart from each other. It is understood that the data acquisition element 11 can transmit battery data acquired by each data acquisition interface 111 to the flexible circuit board 12 via the electrical connection lines 122, and the flexible circuit board 12 can transmit battery data to the reinforcing circuit board 13 via the plurality of electrical connection lines 122. In some application scenarios, the electrical connection lines 122 can also provide power to the data acquisition element 11 to drive the data acquisition element 11 to acquire battery data.

[0051] In some embodiments, the flexible circuit board 12 extends in a first direction x1; a plurality of battery cells 51 are arranged sequentially in the first direction x1 to form a battery cell 51 group, the battery cell 51 group having a first end 52 and a second end 53 in the first direction x1; a plurality of electrical connection lines 122 include a plurality of first connection lines 1221 and two second connection lines 1222; each acquisition interface 111 is electrically connected to one of the first connection lines 1221; the acquisition interface 111 connected to the battery cell 51 located at the first end 52 is a first interface 1111; the acquisition interface 111 connected to the battery cell 51 located at the second end 53 is a second interface 1112; one second connection line 1222 is electrically connected to the first interface 1111; and the other second connection line 1222 is electrically connected to the second interface 1112. For example, taking seventeen battery cells 51 as an example, the seventeen battery cells 51 are arranged sequentially in the first direction x1. The seventeen battery cells 51 are numbered sequentially from the first battery cell 51 to the seventeenth battery cell 51. The position of the first battery cell 51 is designated as the first end 52, and the position of the seventeenth battery cell 51 is designated as the second end 53. The seventeen battery cells 51 are respectively set with seventeen acquisition interfaces 111. Each of the seventeen acquisition interfaces 111 is connected to the reinforcement circuit board 13 through a first connecting line 1221. The acquisition interface 111 connected to the first battery cell 51 is the first interface 1111, and the acquisition interface 111 connected to the seventeenth battery cell 51 is the second acquisition interface 111. The first interface 1111 is connected to the reinforcement circuit board 13 through a second connecting line 1222, and the second interface 1112 is connected to the reinforcement circuit board 13 through another second connecting line 1222. It should be noted that each acquisition interface 111 can transmit the acquired battery data to the reinforcement circuit board 13 via the first connecting line 1221. The two second connecting lines 1222 can serve as power supply lines, thereby facilitating the power supply of the acquisition element 11 through the battery cell 51 located at the first end 52 and the battery cell 51 located at the second end 53.

[0052] In some embodiments, the reinforcing circuit board 13 is located at either the first end 52 or the second end 53. The reinforcing circuit board 13 can be disposed on the flexible circuit board 12 near the first end 52 of the battery cell group, or near the second end 53 of the battery cell group. For example, taking a group of seventeen battery cells 51 as an example, the reinforcing circuit board 13 can be disposed on the end of the flexible circuit board 12 near the first battery cell 51, or near the seventeenth battery cell 51. Correspondingly, when the reinforcing circuit board 13 is located at the first end 52, the electrical connector 14 can be connected to the reinforcing circuit board 13 along the direction from the first end 52 to the second end 53; when the reinforcing circuit board 13 is located at the second end 53, the electrical connector 14 can be connected to the reinforcing circuit board 13 along the direction from the second end 53 to the first end 52.

[0053] It should be noted that, due to the poor layer-changing capability of a single-layer flexible circuit board, each first connection line 1221 cannot transmit battery data across adjacent first connection lines 1221 in a second direction x2 perpendicular to the first direction x1. Therefore, the method of transmitting battery data by multiple first connection lines 1221 is relatively simple. If the flexible circuit board 12 is directly connected to the electrical connector 14, when the arrangement of multiple cells 51 in the cell group changes, it is difficult for multiple first connection lines 1221 to transmit battery data of multiple cells 51 to the corresponding pins of the electrical connector 14. This results in the need to set up different battery management systems 6 for different cell 51 arrangements, which is costly. However, the flexible circuit board 12 is connected to the electrical connector 14 through a multi-layer printed circuit board. When the arrangement of multiple cells 51 in the cell group changes, the layer-changing capability of the multi-layer printed circuit board can be used to adjust the transmission method of battery data according to actual needs. This facilitates the transmission of battery data of multiple cells 51 to the corresponding pins of the electrical connector 14, thereby improving the flexibility and adaptability of the cell sampling component 10 and reducing the application cost.

[0054] In some embodiments, the plurality of acquisition interfaces 111 are divided into a first column 112 and a second column 113. The first column 112 and the second column 113 are located on both sides of the flexible circuit board 12 in a second direction x2 perpendicular to the first direction x1. The plurality of acquisition interfaces 111 in the first column 112 are arranged sequentially in the first direction x1, and the plurality of acquisition interfaces 111 in the second column 113 are arranged sequentially in the first direction x1. By dividing the plurality of acquisition interfaces 111 into the first column 112 and the second column 113, it is helpful for the acquisition interfaces 111 to be better electrically connected to the battery cells 51. For example, each battery cell 51 has a positive terminal and a negative terminal spaced apart. When the plurality of battery cells 51 are arranged along the first direction x1, the positive terminal and the negative terminal of each battery cell 51 can be spaced apart in the second direction x2. In two adjacent battery cells 51, the positive terminal of one battery cell 51 and the negative terminal of the other battery cell 51 are directly opposite each other in the first direction x1. Specifically, the battery cells in the group of battery cells 51 Taking a cell with seventeen cells as an example, the direction from the positive terminal to the negative terminal of the first cell 51 is the same as the positive direction of the second direction x2. The direction from the negative terminal to the positive terminal of the second cell 51 is the same as the positive direction of the second direction x2, and so on. The direction from the positive terminal to the negative terminal of the seventeenth cell 51 is the same as the positive direction of the second direction x2. Similarly, if the direction from the negative terminal to the positive terminal of the first cell 51 is the same as the positive direction of the second direction x2, the direction from the negative terminal to the positive terminal of the seventeenth cell 51 is the same as the positive direction of the second direction x2. Therefore, when each acquisition interface 111 in the first column 112 is closer to the positive terminal of its corresponding battery cell 51, each acquisition interface 111 in the second column 113 is also closer to the positive terminal of its corresponding battery cell 51; when each acquisition interface 111 in the first column 112 is closer to the negative terminal of its corresponding battery cell 51, each acquisition interface 111 in the second column 113 is also closer to the negative terminal of its corresponding battery cell 51. It can be understood that by dividing the first column 112 and the second column 113 by multiple acquisition interfaces 111, the first column 112 and the second column 113 are located on both sides of the flexible circuit board 12 in the second direction x2 perpendicular to the first direction x1. The multiple acquisition interfaces 111 in the first column 112 are arranged sequentially in the first direction x1, and the multiple acquisition interfaces 111 in the second column 113 are arranged sequentially in the first direction x1. This facilitates the consistency of the relative position between each acquisition interface 111 and its corresponding connected battery cell 51, and facilitates better connection between the acquisition element 11 and the battery cell 51.

[0055] In summary, the battery cell sampling assembly 10 provided in this application includes a sampling element 11, a flexible circuit board 12, a reinforcing circuit board 13, and an electrical connector 14. The sampling element 11 is connected to multiple battery cells 51 and is used to collect battery data from each battery cell 51. The flexible circuit board 12 is electrically connected to the sampling element 11 and is used to transmit and receive the battery data collected by the sampling element 11. The reinforcing circuit board 13 is fixed to the side of the flexible circuit board 12 away from the battery cell 51 and is electrically connected to the flexible circuit board 12. The reinforcing circuit board 13 is used to receive the battery data collected by the sampling element 11 through the flexible circuit board 12. The structural strength of the reinforcing circuit board 13 is greater than that of the flexible circuit board 12. The electrical connector 14 is electrically connected to the reinforcing circuit board 13 and is used to connect to the battery management system 6. Through the above implementation, the reinforcing circuit board 13 is fixedly connected to the flexible circuit board 12, and the reinforcing circuit board 13 can provide support and protection for the flexible circuit board 12. The flexible circuit board 12 is electrically connected to the electrical connector 14 through the reinforcing circuit board 13, which facilitates the flexible circuit board 12 to transmit battery data to the battery management system 6 through the reinforcing board and the electrical connector 14, and reduces the risk of damage to the flexible circuit board 12.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. 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 they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the 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 the claims.

Claims

1. A cell sampling assembly, characterized in that, The cell sampling assembly includes: A data acquisition element is connected to multiple battery cells, and the data acquisition element is used to acquire battery data of each of the battery cells; A flexible circuit board is electrically connected to the acquisition element, and the flexible circuit board is used to transmit and receive battery data acquired by the acquisition element; A reinforcing circuit board is fixed to the side of the flexible circuit board away from the battery cell and is electrically connected to the flexible circuit board. The reinforcing circuit board is used to receive battery data collected by the acquisition element through the flexible circuit board. The structural strength of the reinforcing circuit board is greater than that of the flexible circuit board. An electrical connector is provided for electrical connection to the reinforcing circuit board and for electrical connection to the battery management system.

2. The cell sampling assembly according to claim 1, characterized in that, The reinforcing circuit board is a multilayer printed circuit board.

3. The cell sampling assembly according to claim 2, characterized in that, The data acquisition element includes multiple data acquisition interfaces, one of which is connected to one of the battery cells, and each of the data acquisition interfaces is electrically connected to the flexible circuit board.

4. The cell sampling assembly according to claim 3, characterized in that, The flexible circuit board includes a main body and a plurality of electrical connection lines disposed on the main body. One end of each electrical connection line is connected to the acquisition interface and the other end is connected to the reinforcing circuit board. The plurality of electrical connection lines are arranged at intervals between each other.

5. The cell sampling assembly according to claim 4, characterized in that, The flexible circuit board extends in a first direction; a plurality of the battery cells are arranged sequentially in the first direction to form a battery cell group, the battery cell group having a first end and a second end in the first direction; the plurality of electrical connection lines include a plurality of first connection lines and two second connection lines; each of the acquisition interfaces is electrically connected to one of the first connection lines; the acquisition interface connected to the battery cell at the first end is a first interface; the acquisition interface connected to the battery cell at the second end is a second interface; one of the second connection lines is electrically connected to the first interface; and the other of the second connection lines is electrically connected to the second interface.

6. The cell sampling assembly according to claim 5, characterized in that, The reinforcing circuit board is located at either the first end or the second end.

7. The cell sampling assembly according to claim 5, characterized in that, The multiple acquisition interfaces are divided into a first column and a second column. The first column and the second column are located on both sides of the flexible circuit board in a second direction perpendicular to the first direction. The multiple acquisition interfaces in the first column are arranged sequentially in the first direction, and the multiple acquisition interfaces in the second column are arranged sequentially in the first direction.

8. A battery module, characterized in that, The battery module includes a plurality of battery cells and a battery cell sampling component as described in any one of claims 1-7, wherein the battery cell sampling component is electrically connected to the plurality of battery cells respectively.

9. A battery device, characterized in that, The battery device includes a housing, a battery management system, and a battery module as described in claim 8. The housing forms an accommodating space, and the battery module and the battery management system are disposed within the accommodating space. The battery management system is electrically connected to the cell sampling component of the battery module.

10. A vehicle, characterized in that, The vehicle includes the battery device as described in claim 9.

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