Power battery collecting device, battery pack and battery pack

Abstract

The utility model discloses a kind of acquisition device of power battery, battery pack and battery package, the acquisition device of this power battery includes flexible circuit board, multiple acquisition parts have on flexible circuit board, multiple acquisition parts are used to be electrically connected with each cell in power battery, to collect the data information of each cell, slave control module is set on the surface of flexible circuit board, and electrically connected flexible circuit board, to handle the data information of cell;Wireless communication module, set on the side of slave control module opposite flexible circuit board, to be wirelessly transmitted to outside with the data information of each cell handled by slave control module.Such, by setting slave control module on flexible circuit board, the efficient collection and transmission of cell temperature and voltage information are realized.Meanwhile, wireless communication module is set on the side of slave control module opposite flexible circuit board, using wireless transmission mode, reduce physical connection point, reduce the complexity of wiring and production, maintenance cost, improve the reliability and flexibility of system.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a power battery data collection device, battery pack, and battery stack. Background Technology

[0002] The Battery Management System (BMS) plays a crucial role in monitoring and managing the battery pack in new energy vehicles. By collecting parameters such as battery voltage, temperature, and current in real time, the BMS ensures the safe and stable operation of the battery. Flexible printed circuit boards (FPCs), due to their advantages such as flexible wiring, lightweight design, and ease of installation, are widely used in the slave modules of the BMS for collecting parameters of individual battery cells.

[0003] In relevant technical solutions, the slave control module is typically located separately within the power battery and connects to the battery cells via an FPC to collect and transmit temperature and voltage data from each cell. After collecting the temperature and voltage data from the cells, the slave control module transmits it to the main control module of the power battery via a wiring harness.

[0004] However, this traditional wired connection method has obvious shortcomings: as the capacity of battery packs increases and their structure becomes more complex, more slave control modules need to be arranged in the power battery to manage more cells. More slave control modules require a large number of FPCs and a large number of wiring harnesses, which not only increases the difficulty of wiring in the battery pack, but also increases the manufacturing cost. Utility Model Content

[0005] The main purpose of this invention is to propose a power battery data acquisition device, which aims to solve the problems of excessive FPCs and wiring harnesses in the battery pack, which lead to wiring difficulties and increased manufacturing costs.

[0006] To achieve the above objectives, this utility model proposes a power battery data collection device. The power battery includes multiple cells, and the data collection device includes:

[0007] A flexible circuit board, the flexible circuit board including multiple acquisition units, the acquisition units being used to electrically connect with the battery cell to acquire data information of the battery cell;

[0008] The slave control module is disposed on the surface of the flexible circuit board and electrically connected to the flexible circuit board;

[0009] A wireless communication module is connected to the slave control module to transmit the data information of each battery cell processed by the slave control module to the outside.

[0010] In some embodiments, the slave control module includes a strip-shaped printed circuit board, and the wireless communication module is integrally formed on the printed circuit board.

[0011] In some embodiments, the flexible circuit board has opposing first and second surfaces, and the printed circuit board is fixed to the first or second surface by welding and / or adhesive bonding.

[0012] In some embodiments, the flexible circuit board has opposing first and second sides, and a plurality of the acquisition portions are distributed at intervals along their respective extension directions on the first and second sides;

[0013] The acquisition units distributed on the first side and the acquisition units distributed on the second side are staggered.

[0014] In some embodiments, the power battery acquisition device further includes a first welding part and a second welding part. The first welding part is disposed on the flexible circuit board, and the second welding part is disposed on one side of the printed circuit board. The second welding part and the first welding part are welded together by soldering.

[0015] In some embodiments, the second welding portion is a stamp hole pad, and the second welding portion is strip-shaped.

[0016] In some embodiments, the first solder portion is an etched exposed copper pad.

[0017] In some embodiments, the power battery data acquisition device further includes a reinforcing plate;

[0018] The slave control module is disposed on the first surface, and the reinforcing plate is disposed on the second surface and is directly opposite to the slave control module.

[0019] Alternatively, the slave control module may be disposed on the second surface, and the reinforcing plate may be disposed on the first surface and directly opposite the slave control module.

[0020] This utility model further proposes a battery pack, including multiple cells arranged side by side, such as the power battery collection device in the aforementioned embodiment.

[0021] The present invention further proposes a battery pack, including a housing, wherein a power battery as described in the foregoing embodiment is placed inside the housing.

[0022] The beneficial effects of this utility model are as follows: by directly setting the slave control module on the flexible circuit board, a high degree of integration of acquisition and control functions is achieved. Furthermore, by setting a wireless communication module on the slave control module to achieve wireless data transmission, not only is the integration of the entire power battery acquisition device improved and the number of wiring harnesses in the power battery pack reduced, but the internal space utilization of the power battery is also improved. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the power battery data collection device in one embodiment of the present invention;

[0024] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0025] Figure 3 This is a schematic diagram of the structure of the power battery data collection device in one embodiment of the present invention;

[0026] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0027] Figure 5 This is an exploded view of the data collection device of the power battery in one embodiment of the present invention;

[0028] Figure 6 for Figure 5 A magnified view of a section at point C.

[0029] Explanation of icon numbers:

[0030] 100, Flexible circuit board; 100a, Acquisition unit; 101, First surface; 102, Second surface; 103, First welding part; 104, First side edge; 105, Second side edge; F, Length direction;

[0031] 200. Slave control module; 201. Printed circuit board; 202. Second soldering part;

[0032] 300. Wireless communication module;

[0033] 400. Reinforcing plate.

[0034] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] The solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0036] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0037] It should also be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or may have an intervening component present. When a component is referred to as "connected to" another component, it can be directly connected to the other component or may have an intervening component present.

[0038] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0039] Reference Figure 1 and Figure 2 This utility model embodiment proposes a data collection device for a power battery, the power battery comprising multiple cells, and the data collection device for the power battery comprising:

[0040] The flexible circuit board 100 includes multiple acquisition units 100a, which are used to electrically connect with the battery cells to acquire data information of each battery cell.

[0041] The slave control module 200 is disposed on the surface of the flexible circuit board 100 and electrically connected to the flexible circuit board 100;

[0042] The wireless communication module 300 is connected to the side of the slave module 200 facing away from the flexible circuit board 100, and is used to wirelessly transmit the data information of each cell after being processed by the slave module 200 to the outside.

[0043] In this embodiment, the power battery includes multiple cells, which are the basic units for energy storage and can be, for example, lithium-ion batteries, nickel-metal hydride batteries, or lithium iron phosphate batteries. Multiple cells can be connected in series or parallel to form a battery pack. The key function of each cell is to convert chemical energy into electrical energy, maintaining the overall energy supply and output capacity of the power battery.

[0044] In this embodiment, the flexible circuit board 100 is provided with multiple acquisition units 100a, which can be formed by etching, electroplating, or other methods. These units are used to electrically connect with each cell within the power battery, thereby acquiring data information from each cell, such as voltage and temperature. These acquisition units 100a can be connected to the terminals of the cells by soldering, bonding, or snap-fitting, ensuring stable signal transmission and acquisition. The application of the flexible circuit board 100 not only makes the acquisition system more compact and flexible but also effectively reduces the complexity of wiring harnesses.

[0045] In this embodiment, the slave control module 200 refers to the slave control board of the battery management system in the power battery, which works in conjunction with the master control board of the battery management system to manage the power battery. The slave control module 200 is disposed on the surface of the flexible circuit board 100 and electrically connected to the various lines in the flexible circuit board 100, and collects data information from the battery cells through the circuits in the flexible circuit board. In some embodiments, the slave control module 200 converts the collected data signals from the battery cells into a preset digital format and sends the data signals from the battery cells to the master control module of the battery management system. This data information includes state parameters such as temperature, voltage, and current of the battery cells. The slave control module 200 collects, filters, and converts the format of this data to ensure the accuracy and validity of the data.

[0046] In this embodiment, the wireless communication module 300 is located on the side of the slave control module 200 facing away from the flexible circuit board 100. Its main function is to wirelessly transmit the data information of each battery cell processed by the slave control module 200 (e.g., to the master control module). The wireless communication module 300 can employ various wireless protocols, such as Bluetooth, ZigBee, or LoRa, to transmit the processed data wirelessly. This wireless communication method reduces the complexity of wired connections, making the entire system more flexible in design and installation, and also improving the stability and efficiency of data transmission.

[0047] In this embodiment, the data acquisition process of the battery cell is implemented through multiple acquisition units 100a on the flexible circuit board 100. Each acquisition unit 100a is electrically connected to the battery cell and acquires information such as the battery cell's temperature and voltage in real time. This acquired data is transmitted through the flexible circuit board 100 to a slave control module 200 disposed on its surface. After receiving this data, the slave control module 200 performs signal conditioning, filtering, and format conversion on it, transforming the original analog signal into a digital signal usable for subsequent processing. After completing the data processing, the slave control module 200 wirelessly transmits this processed data to the main control module or central control system via the wireless communication module 300.

[0048] Compared to existing technologies where the slave control module 200 transmits processed data to the main control module via wired transmission, this embodiment uses a wireless communication module 300 for data transmission, avoiding complex wiring issues. For example, in existing technologies, after the slave control module 200 collects and processes data from each battery cell, it needs to transmit the data to the main control module via an additional wiring harness. This method is not only complex and space-consuming, but also increases the number of contact points and the risk of system failure. In this embodiment, however, the slave control module 200 directly transmits the processed data to the main control module via the wireless communication module 300, eliminating the wired connection step, simplifying system design, and improving data transmission efficiency and system reliability.

[0049] The beneficial effects of this utility model are as follows: by directly setting the slave control module 200 on the flexible circuit board 100, a high degree of integration of acquisition and control functions is achieved. Furthermore, by setting a wireless communication module 300 on the slave control module 200 for wireless data transmission, not only is the integration of the entire power battery acquisition device improved and the number of wiring harnesses in the power battery pack reduced, but the internal space utilization of the power battery is also improved.

[0050] Continue reading Figure 1 and Figure 2 In this embodiment, the slave control module 200 includes a strip-shaped printed circuit board 201, and the wireless communication module 300 is integrally formed on the printed circuit board 201.

[0051] In this embodiment, the slave control module 200 includes a strip-shaped printed circuit board 201 (PCB), and the wireless communication module 300 can be integrally formed on the printed circuit board 201. This integration method achieves a high degree of integration between the slave control module 200 and the wireless communication module 300, making the system more compact and efficient in design and manufacturing.

[0052] The integration of the wireless communication module 300 with the printed circuit board 201 can be achieved through various processes, including but not limited to surface mount technology (SMT), direct soldering, embedded packaging, and modular embedding.

[0053] Specifically, the wireless communication module 300 can be directly mounted on the printed circuit board 201 using surface mount technology (SMT). SMT is a commonly used process that achieves a robust connection of modules by mounting components onto the surface of a circuit board and then reflow soldering them. This method offers a high level of automation, is suitable for mass production, and ensures the reliability and compactness of the integration.

[0054] When using direct soldering, the pins of the wireless communication module 300 can be connected to the printed circuit board 201 via soldering. Soldering is commonly used to ensure a stable electrical connection between the module and the PCB, and is suitable for modules with simple structures that do not require frequent replacement.

[0055] The wireless communication module 300 can also be embedded in a protective housing along with the printed circuit board 201. This approach provides better anti-interference performance and physical protection, making it suitable for applications with high environmental requirements.

[0056] The wireless communication module 300 can also be embedded as a separate small module into the slot or interface of the printed circuit board 201. The advantage of this approach is that it is easy to replace and maintain, and it is suitable for scenarios that require flexible module replacement.

[0057] Through the above-mentioned integration processes, the wireless communication module 300 and the slave control module 200 achieve a tight functional integration. Compared with the traditional wired connection method, this integrated design effectively reduces physical connection points, making the entire power battery simpler and more reliable. At the same time, this integration method also improves production efficiency, reduces manufacturing and maintenance costs, and makes the entire system more adaptable and stable in complex environments.

[0058] In addition, the integration of the wireless communication module 300 makes wireless data transmission more stable and reliable, effectively reducing signal loss and failure risks caused by wired connections, and providing an efficient solution for data acquisition and transmission of power batteries.

[0059] Furthermore, the flexible circuit board 100 has a first surface 101 and a second surface 102 opposite to each other, and the printed circuit board 201 is fixed to the first surface 101 or the second surface 102 by soldering and / or adhesive bonding.

[0060] In this embodiment, the flexible circuit board 100 (FPC) has opposing first surfaces 101 and second surfaces 102, i.e., front and back. The printed circuit board 201 (PCB) can be fixed to the first surface 101 or the second surface 102 of the flexible circuit board 100 by soldering and / or adhesive bonding.

[0061] Specifically, the flexible circuit board 100 is flat, possessing excellent flexibility and adaptability, making it suitable for wiring within limited spaces. The design of the first surface 101 and the second surface 102 allows the arrangement of components to be adjusted according to specific installation requirements, thereby achieving optimal space utilization in different application scenarios.

[0062] In this embodiment, the printed circuit board 201 can be connected to the first surface 101 or the second surface 102 of the flexible circuit board 100 via solder joints. These solder joints can be made using reflow soldering to ensure the strength and conductivity of the solder joints. For example, during the reflow soldering process, the solder paste is heated and melted to tightly bond the printed circuit board 201 to the flexible circuit board 100, forming a stable electrical connection. The selection of the soldering location (i.e., the first surface 101 or the second surface 102) can be flexibly chosen according to the spatial structure of the device and wiring requirements. To further increase the strength, adhesive can be added to the soldering contacts to bond the printed circuit board 201 to the flexible circuit board 100.

[0063] This welding method integrates the printed circuit board 201 with the flexible circuit board 100, preserving the flexibility of the flexible circuit board 100 while ensuring the functionality of the printed circuit board 201. It is suitable for use in power batteries with limited space and complex layouts.

[0064] Continue reading Figure 1 and Figure 2 In this embodiment, the flexible circuit board 100 has a first side 104 and a second side 105 with opposite sides, and a plurality of collection parts 100a are distributed at intervals along their extension directions on the first side 104 and the second side 105 respectively.

[0065] The acquisition unit 100a distributed on the first side 104 and the acquisition unit 100a distributed on the second side 105 are staggered.

[0066] In this embodiment, by spaced-apart acquisition units 100a along the sides of the flexible circuit board 100, the edge area of ​​the flexible circuit board 100 is effectively utilized, avoiding the problem of excessively concentrated wiring. That is, regardless of whether the acquisition units 100a are located on the first side 104, the second side 105, or both sides simultaneously, the space utilization of the flexible circuit board can be maximized, reserving more space for the arrangement of other components. It should be noted that the first side 104 and the second side 105 of the flexible circuit board are two parallel sides extending along the first direction F, such as... Figure 1 As shown in the figure.

[0067] Meanwhile, arranging the acquisition units 100a at intervals can reduce signal interference between adjacent acquisition units 100a and improve the accuracy and stability of data acquisition, for example in high-frequency signal acquisition scenarios.

[0068] For example, if the battery cells of the battery pack are arranged relatively compactly, the collection unit 100a can be arranged only along the first side 104 or the second side 105 to adapt to space constraints. If the battery cells are arranged relatively dispersedly, the collection unit 100a can be arranged along both the first side 104 and the second side 105 simultaneously to achieve a more uniform collection distribution.

[0069] This makes the layout of the acquisition unit 100a more orderly, which is conducive to optimizing the signal acquisition path and the space utilization of the circuit board.

[0070] Specifically, the acquisition units 100a are arranged on both sides of the flexible circuit board 100, which can effectively reduce mutual interference between signal lines and improve the quality and accuracy of signal acquisition. The spaced acquisition units 100a along both sides also minimize the data signal acquisition path for each battery cell, thereby reducing resistance and signal loss and improving data accuracy.

[0071] Furthermore, the acquisition units 100a distributed on the first side 104 and the acquisition units 100a distributed on the second side 105 are staggered. This staggered arrangement avoids components in the same horizontal or vertical direction from being "crowded" on a single line, reducing the concentration of circuit wiring and facilitating more flexible and orderly wiring. In addition, on flexible circuit boards, signal traces need to avoid excessively concentrated intersections or overlaps. The staggered arrangement can leave more space for the conductors, reducing wiring difficulty.

[0072] In this embodiment, the acquisition unit 100a can be connected to the cells in the power battery by welding or snap-fitting to acquire key parameters such as temperature and voltage of each cell. This design, arranged along both sides, not only simplifies the internal wiring structure of the power battery, making the overall design more compact, but also helps to achieve efficient electrical connections within a limited space, ensuring the stability and reliability of the acquisition system.

[0073] Continue reading Figure 2 In this embodiment, the power battery data acquisition device further includes a first welding part 103 and a second welding part 202. The first welding part 103 is disposed on the flexible circuit board 100, and the second welding part 202 is disposed on one side of the printed circuit board 201. The second welding part 202 is soldered to the first welding part 103. Specifically, the first welding part 103 penetrates the first surface 101 of the flexible circuit board 100 and extends to the second surface 102, forming a through-hole pad structure. The printed circuit board 201 is at least partially soldered to the first welding part 103, and is electrically connected to the circuitry within the flexible circuit board 100 through the first welding part 103.

[0074] The first soldering part 103 is formed through etching and electroplating processes, ensuring its continuity and conductivity, making both its surfaces suitable for soldering. During actual soldering, the printed circuit board 201 is aligned with the first soldering part 103, and solder paste can be used for soldering. During reflow soldering, the solder paste melts upon heating, firmly soldering the pins of the slave module 200 to the first soldering part 103, thereby achieving a stable electrical connection between the printed circuit board 201 and the wiring within the flexible circuit board 100. This effectively utilizes the double-sided structure of the flexible circuit board 100. The application of through-hole pads allows the printed circuit board 201 to be securely fixed to the flexible circuit board 100, improving soldering strength and reducing the risk of resistance and poor contact. The first soldering part 103, as a through-hole pad, provides a stable soldering position, ensuring the reliability of signal transmission.

[0075] Continue reading Figure 2 In this embodiment, the power battery collection device further includes a second welding part 202, which is constructed on one side of the printed circuit board 201 and is welded to the flexible circuit board 100 by soldering.

[0076] In this embodiment, two different soldering schemes can be used to achieve the electrical connection between the control module 200 and the flexible circuit board 100 (FPC).

[0077] In the first embodiment, a second soldering part 202 may be constructed on the printed circuit board 201. The second soldering part 202 is located on one side of the printed circuit board 201, and can be designed as a raised solder point or a through-hole pad. The second soldering part 202 is soldered to the flexible circuit board 100 by soldering. During the soldering process, the second soldering part 202 is aligned with the solder point on the flexible circuit board 100, and a stable physical and electrical connection is formed by the heating and melting of solder paste.

[0078] The raised design of the second soldering part 202 facilitates better soldering with the flexible circuit board 100, while the through-type solder pad provides a larger soldering area, increasing the strength and conductivity of the solder joint. Through the design of the second soldering part 202, the printed circuit board 201 can not only be securely connected to the flexible circuit board 100, but also achieve efficient electrical connection between the slave control module 200 and the internal circuitry of the flexible circuit board 100.

[0079] In the second embodiment, a first soldering portion 103 is provided on the flexible circuit board 100, and a second soldering portion 202 is also provided on the printed circuit board 201. The first soldering portion 103 penetrates the first surface 101 and the second surface 102 of the flexible circuit board 100 to form a through solder pad structure, while the second soldering portion 202 is located on the side or bottom of the printed circuit board 201.

[0080] In this design, the printed circuit board 201 is soldered to the first soldering part 103 on the flexible circuit board 100 via its second soldering part 202. This dual soldering part design makes the connection between the printed circuit board 201 and the flexible circuit board 100 tighter and more stable. The soldering process can still use soldering, and reflow soldering is used to firmly solder the second soldering part 202 of the printed circuit board 201 to the first soldering part 103 of the flexible circuit board 100 together to form a stable electrical connection.

[0081] By employing these two different soldering methods, this embodiment provides diverse options for the electrical connection between the printed circuit board 201 and the flexible circuit board 100 to meet the needs of different application scenarios. Both the raised pad design with side soldering and the through-type double solder joint structure effectively improve the robustness of the electrical connection and the reliability of the system.

[0082] In some embodiments, the printed circuit board 201 can be bonded to the first surface 101 or the second surface 102 of the flexible circuit board 100 using adhesive. That is, the connection between the printed circuit board 201 and the flexible circuit board 100 includes not only soldering, but also adhesive bonding to further enhance the stability of the connection. While the printed circuit board 201 achieves electrical connection with the circuitry within the flexible circuit board 100 through soldering, a portion of the structure of the printed circuit board 201 can also be bonded to the first surface 101 or the second surface 102 of the flexible circuit board 100 using adhesive.

[0083] The application of adhesive backing provides additional mechanical support, thereby increasing the fixation strength of the printed circuit board 201 on the flexible circuit board 100.

[0084] Specifically, during installation, a suitable amount of adhesive is applied to a portion of the printed circuit board 201, and this portion is precisely aligned with the first surface 101 or the second surface 102 of the flexible circuit board 100. Appropriate pressure is then applied to ensure the adhesive adheres fully. This bonding method, when combined with soldering, ensures the reliability of the electrical connection and improves the stability of the overall mechanical structure. Especially in the application scenario of power batteries, it can effectively cope with vibrations and shocks in the environment.

[0085] In some embodiments, the second welding portion 202 is provided in a block shape. In this embodiment, a protruding metal sheet can be provided on the side of the printed circuit board 201 to form the second welding portion 202, so as to facilitate welding with the first welding portion 103; of course, in some embodiments, the second welding portion 202 can be a stamp hole pad. Specifically, it can be formed by electroplating graphitization treatment on the holes or through holes at the edge of the printed circuit board 201, and cutting the edge of the board to form a series of half holes, which are called stamp hole pads.

[0086] Furthermore, the first welding part 103 is a through-etched exposed copper pad.

[0087] See Figure 3 , Figure 4 , Figure 5 and Figure 6 In this embodiment, the power battery data acquisition device also includes a reinforcing plate 400;

[0088] The slave control module 200 is disposed on the first surface 101, and the reinforcing plate 400 is disposed on the second surface 102 and is directly opposite to the slave control module 200.

[0089] Alternatively, the slave control module 200 is disposed on the second surface 102, and the reinforcing plate 400 is disposed on the first surface 101, and is directly opposite to the slave control module 200.

[0090] In this embodiment, the slave control module 200 is disposed on the first surface 101 of the flexible circuit board 100, while the reinforcing plate 400 is disposed on the second surface 102, directly opposite the slave control module 200. Alternatively, the slave control module 200 may be disposed on the second surface 102 of the flexible circuit board 100, and the reinforcing plate 400 may be disposed on the first surface 101, directly opposite the slave control module 200. The reinforcing plate 400 is designed to enhance the rigidity of the mounting area of ​​the slave control module 200 and reduce the adverse effects on electrical connections and module stability that may result from bending of the flexible circuit board 100 due to external forces.

[0091] The reinforcing plate 400 can be made of metal or high-strength composite materials, such as aluminum alloy, stainless steel, or glass fiber reinforced plastic. These materials possess excellent mechanical properties, effectively enhancing the bending and impact resistance of the flexible circuit board 100. In practical applications, the reinforcing plate 400 is fixed to the corresponding surface of the flexible circuit board 100 using adhesives or backing adhesives, ensuring precise alignment with the corresponding position of the slave control module 200. This aligned design allows the reinforcing plate 400 to directly absorb and disperse external stresses from the slave control module 200 and its surrounding environment, thereby protecting the integrity of the electrical connection.

[0092] In the complex application environment of power batteries, the flexible circuit board 100 often faces significant mechanical stress, such as vibration, impact, and repeated bending operations. Therefore, by adding a reinforcing plate 400 to the back of the slave control module 200, excessive deformation of the flexible circuit board 100 due to external mechanical influences can be effectively prevented. This not only improves the durability and reliability of the entire power battery acquisition device but also ensures the stability of the electrical connection between the slave control module 200 and the flexible circuit board 100.

[0093] Overall, by adding the reinforcing plate 400, this embodiment improves the mechanical strength and stability of the flexible circuit board 100 in power battery applications, providing a reliable guarantee for the long-term stable operation of the power battery in complex working environments.

[0094] The present invention further proposes a power battery including multiple cells arranged side by side and a power battery data collection device. The specific structure of the power battery data collection device is as described in the above embodiments. Since this second subject adopts all the technical solutions of all the above embodiments, it has at least all the technical effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0095] In this embodiment, multiple cells in the power battery acquire data through a power battery data acquisition device. A flexible circuit board 100 is electrically connected to each cell of the power battery, acquiring key parameters of each cell, such as temperature and voltage. The cell data is first transmitted to the slave control module 200 via the acquisition unit 100a on the flexible circuit board 100. The slave control module 200 processes the data from each cell, including signal conditioning and format conversion. The processed data is then wirelessly transmitted to the master control module via the wireless communication module 300.

[0096] By using wireless communication, complex wired connections are eliminated, simplifying system wiring and making the entire power battery structure more compact and reliable. Furthermore, the addition of the reinforcing plate 400 effectively improves the mechanical strength of the flexible circuit board 100, enhances the robustness of the connection between the slave control module 200 and the flexible circuit board 100, and further improves the system's vibration resistance and long-term operational stability.

[0097] The acquisition device used in this embodiment achieves efficient electrical connection with each cell of the power battery and transmits data information wirelessly. It has significant advantages such as convenient installation, reduced wiring complexity, and improved system reliability, and is suitable for various battery system application scenarios that require reliable monitoring and data acquisition.

[0098] This invention further proposes a battery pack, including a housing, in which at least one power battery from the aforementioned embodiment is placed. In this embodiment, multiple power batteries can be integrated into a single housing to form a battery pack, achieving centralized storage and unified management of electrical energy.

[0099] In this embodiment, using the aforementioned power battery as the core component of the battery pack brings many significant advantages. First, the power battery's data acquisition device achieves efficient electrical connection with each cell via the flexible circuit board 100, and performs data acquisition and wireless transmission through the slave control module 200 and the wireless communication module 300, enabling real-time monitoring and management of the status of each cell within the battery pack. In this way, the main control module can promptly obtain information such as the temperature and voltage of each cell, ensuring the overall safety and efficient operation of the battery pack.

[0100] Secondly, each power battery in the battery pack employs a reinforcing plate 400 and a flexible circuit board 100, significantly enhancing the overall structural mechanical strength and enabling it to resist external vibrations and impacts. This design is particularly suitable for applications requiring high stability, such as electric vehicles and energy storage systems, ensuring the reliability and durability of the battery pack under complex operating conditions.

[0101] The above description is only a part or preferred embodiment of this utility model. Neither the text nor the drawings should limit the scope of protection of this utility model. All equivalent structural transformations made using the content of this utility model specification and drawings under the overall concept of this utility model, or direct / indirect applications in other related technical fields, are included within the scope of protection of this utility model.

Claims

1. A data collection device for a power battery, the power battery comprising multiple cells, characterized in that, The data collection device for the power battery includes: A flexible circuit board, the flexible circuit board including multiple acquisition units, the acquisition units being used to electrically connect with the battery cell to acquire data information of the battery cell; The slave control module is disposed on the surface of the flexible circuit board and electrically connected to the flexible circuit board; A wireless communication module, electrically connected to the slave control module, is used to transmit the data information of each of the battery cells processed by the slave control module to the outside.

2. The power battery data collection device according to claim 1, characterized in that, The slave control module includes a strip-shaped printed circuit board, and the wireless communication module and the printed circuit board are integrally formed.

3. The power battery data collection device according to claim 2, characterized in that, The flexible circuit board has a first surface and a second surface opposite to each other, and the printed circuit board is fixed to the first surface or the second surface by welding or adhesive bonding.

4. The power battery data collection device according to claim 1 or 3, characterized in that, The flexible circuit board has a first side and a second side, and a plurality of the acquisition units are distributed at intervals along the extension direction of the first side and the second side, respectively. The acquisition units distributed on the first side and the acquisition units distributed on the second side are staggered.

5. The power battery data collection device according to claim 3, characterized in that, The power battery acquisition device further includes a first welding part and a second welding part. The first welding part is disposed on the flexible circuit board, and the second welding part is disposed on one side of the printed circuit board. The second welding part and the first welding part are welded together by soldering.

6. The power battery data collection device according to claim 5, characterized in that, The second welded part is arranged in a block shape.

7. The power battery data acquisition device according to claim 5, characterized in that, The first welding part is a through-etched exposed copper pad.

8. The power battery data collection device according to claim 3, characterized in that, The power battery data acquisition device also includes a reinforcing plate; Wherein, the slave control module is disposed on the first surface, and the reinforcing plate is disposed on the second surface, directly opposite the slave control module; or, The slave control module is disposed on the second surface, and the reinforcing plate is disposed on the first surface and is directly opposite the slave control module.

9. A battery pack comprising a plurality of cells arranged side by side, characterized in that, It also includes the power battery data collection device as described in any one of claims 1 to 8.

10. A battery pack, characterized in that, It includes a housing, wherein at least one battery pack as described in claim 9 is disposed within the housing.

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