Wireless networking structure of battery cell module, battery pack and networking method

Abstract

The present invention provides a wireless networking structure, battery pack, and networking method for battery modules, wherein the wireless networking structure includes multiple battery modules and a first network; the first network is a ring network formed by wirelessly connecting all battery modules in sequence; the wireless networking structure externally includes multiple wireless communication peripherals, each of which is wirelessly connected to all battery modules; the data transmission mode in the first network is bidirectional transmission between adjacent battery modules; wherein the battery modules in the first network are connected in a hand-in-hand manner. The wireless networking structure of the battery modules of the present invention effectively improves the safety and stability of the battery module structure.

Description

Technical Field

[0001] The present invention belongs to the field of battery technology and relates to a wireless networking structure of a battery cell module, and in particular to a wireless networking structure of a battery cell module, a battery pack and a networking method. Background Art

[0002] With the rapid development of new energy technologies, battery systems play a vital role in electric vehicles, energy storage systems, and unmanned equipment. As a core component of a battery system, the management and networking of battery cell modules are directly related to the system's performance, safety, and reliability.

[0003] Traditional battery management systems (BMS) achieve inter-module connectivity and communication through wired connections, which presents challenges such as complex wiring and a high risk of failure. Specifically, large-scale battery packs (e.g., systems containing hundreds of battery modules) typically use wired connections, which requires extensive wiring, leading to complex installation, large space requirements, and significantly increased system design difficulty and maintenance costs. Problems such as aging cables, poor contact, or loose connection points can easily lead to communication interruptions or data loss. Second, current wireless BMS solutions mostly use a star-shaped networking structure, which lacks system resilience in the event of a single point of failure, potentially leading to the risk of global data failure and poor data synchronization and security. Furthermore, data transmission relies on a single link, making it susceptible to physical failures or signal interference, and lacking redundant paths, resulting in low data transmission reliability. Third, there is a lack of flexibility and scalability. In traditional wired solutions or star-shaped networks, the network structure is fixed and difficult to adapt to dynamically changing application scenarios. Each time a module is added or replaced, the wiring and connection scheme must be redesigned, making expansion difficult. Summary of the Invention

[0004] The purpose of the present invention is to provide a wireless networking structure of a battery module, a battery pack and a networking method, so as to solve the technical problem of insufficient structural safety of the battery module in the prior art.

[0005] In a first aspect, the present invention provides a wireless networking structure of a battery module, comprising a plurality of battery modules and a first network;

[0006] The first network is a ring network formed by wirelessly connecting all the battery modules in sequence;

[0007] The wireless networking structure externally includes a plurality of wireless communication peripherals, each of which is wirelessly connected to all of the battery modules;

[0008] The data transmission mode in the first network is bidirectional transmission between adjacent battery modules;

[0009] Among them, the connection method of the battery modules in the first network is hand-in-hand connection.

[0010] In one embodiment of the present invention, a second network is further included.

[0011] The second network includes the battery modules separated by a first preset number of battery modules, and the data transmission mode in the second network is bidirectional transmission between the battery modules separated by the first preset number of battery modules;

[0012] The total number of the battery modules cannot be divided evenly by the first preset number plus one, and the battery modules in the second network are connected in a hand-in-hand manner.

[0013] In one embodiment of the present invention, a third network is further included.

[0014] The third network includes the battery modules separated by a second preset number of battery modules, and the data transmission mode in the third network is bidirectional transmission between the battery modules separated by the second preset number of battery modules;

[0015] The total number of the battery modules cannot be divided evenly by the second preset number plus one, and the battery modules in the third network are connected in a hand-in-hand manner.

[0016] In one embodiment of the present invention, data between different networks are backed up.

[0017] In one embodiment of the present invention, each of the battery cell modules includes a wireless BMS module and a plurality of battery cells.

[0018] In one embodiment of the present invention, the content of the data transmission is preset common data, the preset common data is stored in each of the battery cell modules, and the preset common data includes data identifiers of multiple attributes of all battery cell modules;

[0019] Each of the battery cell modules can only modify its own corresponding data identifier.

[0020] In one embodiment of the present invention,

[0021] The battery cell module updates the preset common data at a preset period.

[0022] In one embodiment of the present invention, the data transmission is encrypted using an AES algorithm.

[0023] In a second aspect, the present invention further provides a battery pack based on the wireless networking structure of the battery cell modules as described above, characterized in that the hardware structure of the battery cell modules in the battery pack is the wireless networking structure of the battery cell modules as described above.

[0024] In a third aspect, the present invention further provides a method for networking a battery module based on the wireless networking structure of the battery module as described above, comprising:

[0025] Obtain multiple battery cell modules to be networked;

[0026] Based on the wireless networking structure, the multiple battery cell modules to be networked are networked.

[0027] As described above, the wireless networking structure of the battery module, the battery pack, and the networking method of the present invention have the following beneficial effects:

[0028] 1. The present invention constructs the first network of battery modules in a hand-in-hand manner. The battery modules are connected one by one in a fixed order, which occupies fewer resources, significantly reduces the possibility of conflict, and improves security. At the same time, when adding or deleting battery modules, it is only necessary to adjust the order of wireless connections, which has stronger adaptability and scalability.

[0029] 2. The present invention provides a multi-level wireless networking structure by introducing a second network, which can further improve the reliability of data transmission and ensure that in the event of an interruption in the first network, data can still be transmitted through the second network to bypass the fault area, significantly reducing the risk of a single point failure causing the entire network to fail. It helps to solve the signal conflicts, signal blocking and node isolation problems that may occur in large-scale battery cell module networks, and provides connection channel guarantees for the stable operation of large-scale battery cell module networks. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A structural diagram showing the wireless networking structure of the battery module according to an embodiment of the present invention is shown.

[0031] Figure 2 A schematic structural diagram of a battery module in a wireless networking structure of a battery module according to an embodiment of the present invention is shown.

[0032] Figure 3 A schematic diagram showing the roles of multiple networks backing up each other in the wireless networking structure of the battery module according to an embodiment of the present invention is shown.

[0033] Figure 4 A schematic structural diagram of a battery pack according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0034] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless they conflict.

[0035] The following will describe in detail the principles and implementation methods of the wireless networking structure, battery pack, and networking method of the battery cell module of this embodiment, so that those skilled in the art can understand the wireless networking structure, battery pack, and networking method of the battery cell module of this embodiment without creative work.

[0036] In order to solve the above technical problems existing in the prior art, an embodiment of the present invention provides a wireless networking structure of a battery module.

[0037] Figure 1 The schematic diagram of the wireless networking structure of the battery module according to the embodiment of the present invention is shown. Figure 1 As shown, the wireless networking structure of the battery module described in the embodiment of the present invention includes multiple battery modules and a first network; the first network is a ring network formed by wirelessly connecting all battery modules in sequence; the outside of the wireless networking structure includes multiple wireless communication peripherals, and each wireless communication peripheral is wirelessly connected to all battery modules; the data transmission method in the first network is bidirectional transmission between adjacent battery modules; wherein, the connection method of the battery modules in the first network is hand-in-hand connection.

[0038] Specifically, the battery cell module is the basic unit of the wireless networking structure of the embodiment of the present invention, and the battery cell module is hardware for detecting and managing the operating status of the battery cell and transmitting data wirelessly. The first network is a ring network composed of all battery cell modules connected wirelessly and in sequence, and the first network is used to realize data communication between battery cell modules. A plurality of wireless communication peripherals are arranged outside the wireless networking structure, and each wireless communication peripheral is wirelessly connected to all battery cell modules, and is responsible for data communication between battery cell modules, for example, collecting data from the battery cell modules of the first network and uploading it to the cloud server, or receiving instructions from the cloud server and transmitting them to the battery cell module. In the first network, data is transmitted between adjacent battery cell modules, and the data transmission between every two adjacent battery cell modules is bidirectional, so it can be ensured that the data can complete the transmission process through the path on the other side (for example, counterclockwise) when a fault occurs on one side (for example, clockwise), thereby improving the fault resistance of data transmission. It should be noted that in the prior art, the battery modules are wired connections in a star-shaped network, which has poor synchronization, is prone to conflicts, and occupies a lot of resources. In contrast, in the first network of the embodiment of the present invention, the wireless connections between the battery modules in the hand-in-hand manner are connected one by one in a fixed order. Therefore, it occupies fewer resources, puts equal pressure on the operation of each battery module (such as current consumption), and significantly reduces the possibility of conflicts. At the same time, when adding or deleting battery modules, it is only necessary to adjust the order of the wireless connections, which is simple to operate and more scalable.

[0039] Optionally, in a specific embodiment of the present invention, a second network is introduced on the basis of the first network to form a multi-level wireless networking structure. The wireless networking structure of the battery module of the embodiment of the present invention also includes a second network, and the second network includes battery modules separated by a first preset number of battery modules. The data transmission method in the second network is bidirectional transmission between battery modules separated by a first preset number of battery modules; wherein the total number of battery modules cannot be divided by the first preset number plus one, and the connection method of the battery modules in the second network is hand-in-hand connection. Specifically, the second network is composed of battery modules separated by a first preset number of battery modules in the first network, and the construction method of the second network is: arbitrarily select a battery module in the first network as the starting point, and obtain the corresponding battery module as the next battery module every first preset number of battery modules along the preset direction until all battery modules in the first network are traversed and selected, and the preset direction is clockwise or counterclockwise. Figure 2 The schematic diagram of the structure of the battery module in the wireless networking structure of the battery module according to the embodiment of the present invention is shown. Figure 2 As shown, Figure 2The second network is described using an example where the first preset number is 3 and the total number of cell modules is 9. This does not limit the first preset number to 3, and those skilled in the art may select other suitable first preset numbers and total numbers of cell modules. The first network is a ring network formed by sequentially connecting cell module 1, cell module 2, cell module 3, cell module 4, cell module 5, cell module 6, cell module 7, cell module 8, and cell module 9. In the second network, using cell module 1 as an example, every three cell modules are selected as the next cell module. Therefore, the next cell module after cell module 1 is cell module 5, separated by cell modules 2, 3, and 4. In this way, the second network is constructed: cell module 1, cell module 5, cell module 9, cell module 4, cell module 8, cell module 3, cell module 7, cell module 2, and cell module 6. This completes the traversal of all cell modules in the first network and forms the second network. The second network is based on the cell modules in the first network and is connected through a "jumping" method. Since the total number of cell modules is not divisible by the first preset number plus one (in the above example, 9 is not divisible by 3 + 1), the second network can cover all cell modules in the entire first network. After the battery modules in the second network are connected in a "jump-type" manner, the data transmission mode is bidirectional transmission. For example, in the second network, data can be transmitted from battery module 1 to the next battery module 5, and can also be transmitted from battery module 5 to battery module 1. In the second network, the transmission between any battery module and the next battery module is separated by a first preset number of battery modules, that is, its transmission speed is higher than that of the first network. For example, in the second network, the data of battery module 1 is directly transmitted to battery module 4, which is equivalent to battery module 1 and battery module 4 being adjacent, while in the first network, the data transmission from battery module 1 to battery module 4 needs to be transmitted in the order of battery module 1-battery module 2, battery module 2-battery module 3, and battery module 3-battery module 4. Therefore, the data transmission efficiency of adjacent battery modules (adjacent battery modules, i.e., any battery module and the next battery module) in the second network is higher. By introducing a second network, the present invention provides a multi-level wireless networking structure, which can further improve the reliability of data transmission and ensure that in the event of a first network interruption, data can still be transmitted through the second network to bypass the fault area. At the same time, bidirectional transmission and cross-node connection provide a backup path, significantly reducing the risk of single-point failure causing the entire network to fail. It helps to solve the signal conflicts and node isolation problems that may occur in large-scale battery module networks, and provides a solid guarantee for the stable operation of large-scale battery module networks. In addition, in the second network, the battery modules are connected according to a first preset number of intervals to form a new ring network. The connection method is still hand-in-hand connection, which is easy to implement and maintain.

[0040] Optionally, a third network is also included, the third network includes battery modules that are separated by a second preset number of battery modules, and the data transmission method in the third network is bidirectional transmission between battery modules that are separated by a second preset number of battery modules; wherein, the total number of battery modules cannot be divided by the second preset number plus one, the connection method of the battery modules in the third network is hand-in-hand connection, and the second preset number is different from the first preset number. Specifically, the third network is composed of battery modules that are separated by a second preset number of battery modules in the first network, and the construction method of the third network is: arbitrarily select a battery module in the first network as the starting point, and obtain the corresponding battery module as the next battery module every second preset number of battery modules along the preset direction until all battery modules in the first network are traversed and selected, and the preset direction is clockwise or counterclockwise. In this embodiment, the third network is described using an example in which the second preset number is 4 and the total number of cell modules is 9. This does not limit the second preset number to 4, and those skilled in the art may select other appropriate second preset numbers and total number of cell modules. The first network is a ring network formed by sequentially connecting cell module 1, cell module 2, cell module 3, cell module 4, cell module 5, cell module 6, cell module 7, cell module 8, and cell module 9. In the third network, using cell module 1 as an example, every four cell modules are selected as the next cell module. Therefore, the next cell module after cell module 1 is cell module 6, separated by cell modules 2, 3, 4, and 5. In this way, the third network is constructed: cell module 1, cell module 6, cell module 2, cell module 7, cell module 3, cell module 8, cell module 4, cell module 9, and cell module 5. This completes the traversal of all cell modules in the first network and forms the third network. The third network is based on the cell modules in the first network and is connected through a "skip" connection method. Since the total number of cell modules is not divisible by the second preset number plus one (in the above example, 9 is not divisible by 4 + 1), the third network can cover all cell modules in the entire first network. After the cell modules in the third network are connected in a "jump-type" manner, data transmission is bidirectional. For example, in the third network, data can be transmitted from cell module 1 to the next cell module 6, and also from cell module 6 to cell module 1. In the third network, the cell modules are connected according to a second preset number of intervals to form a new ring network. The connection method is still hand-in-hand connection, which is easy to implement and maintain. In the third network, the transmission between any cell module and the next cell module is separated by a second preset number of cell modules, that is, its transmission speed is also higher than that of the first network.The second preset number is different from the first preset number, which ensures the independence of the third networking path from the first networking and the second networking. By introducing the third networking, the present invention realizes a more efficient and reliable multi-level connection method in the wireless networking structure. The cross-node connection of the third networking further optimizes the data transmission efficiency and enhances the robustness and fault tolerance of the network, which is suitable for the high-performance wireless communication requirements of large-scale battery cell modules.

[0041] Alternatively, those skilled in the art can establish more network groups with other preset numbers, for example, establishing a fourth network group with the third preset number as an interval, to achieve a multi-level network structure.

[0042] Optionally, data between different networks is backed up for each other. Figure 3 The wireless networking structure of the battery module according to the embodiment of the present invention is shown in FIG. Figure 3 As shown in the figure, a power meter, a charger, a controller and a mobile phone are used as four wireless communication peripherals for example. Those skilled in the art can set other wireless communication peripherals. Figure 3 Taking the case where the first network and the second network exist at the same time as an example, the first network is used as the primary network and the second network is used as the backup network. At the same time, the first network and the second network back up each other to ensure functional safety. In the first network or the second network, each battery module plays the role of 1 master and 1 slave. When the first network and the second network are used at the same time, each battery module plays the role of 2 masters and 2 slaves. In addition, the battery module needs to be connected to the wireless communication peripherals, and each battery module plays the role of 2 masters and 3 slaves. It should be noted that Figure 3 In the figure, only the connection between the power meter and the battery module 9 is used as an example. According to actual needs, the power meter can also be connected to other battery modules. Similarly, other peripherals can also be connected to multiple battery modules respectively. The master-slave relationship of the connection can be interchangeable, and data transmission is bidirectional.

[0043] Optionally, each battery cell module includes a wireless BMS module and multiple battery cells. Figure 2 The schematic diagram of the structure of the battery module in the wireless networking structure of the battery module according to the embodiment of the present invention is shown. Figure 3As shown in the figure, each battery module consists of a wireless BMS module and multiple battery cells. These battery cells are energy storage units responsible for storing electrical energy and supplying it to the load. The parameters of each battery cell (such as voltage and temperature) are monitored in real time through the wireless BMS module. The wireless BMS module is part of the battery management system (BMS), responsible for monitoring and managing the operating status of the battery module and realizing data transmission through wireless communication, such as data acquisition, data transmission, fault detection, and charge and discharge balancing. Traditional BMS uses wired connections for data transmission, which has problems such as complex wiring, multiple fault points, and difficult maintenance. The wireless BMS module communicates through wireless connections, reducing the risk of failure.

[0044] Optionally, the content of data transmission is preset public data, which is stored in each battery cell module. The preset public data includes data identifiers of multiple attributes of all battery cell modules; each battery cell module can only modify its own corresponding data identifier. In this embodiment, the content of data transmission is set to preset public data, and a distributed data storage and corresponding modification authority mechanism is introduced to improve the efficiency and security of data management. This design not only ensures the consistency of data of each battery cell module in the network, but also standardizes data modification permissions, thereby avoiding erroneous operations or data conflicts. Specifically, the preset public data is stored in each battery cell module, that is, each battery cell module saves a copy of the preset public data, that is, each battery cell module saves a complete copy of the global data, ensuring the consistency of the data in the network. The preset public data includes data identifiers of multiple attributes of all battery cell modules, and the data identifiers are used to mark the attributes of the battery cell modules, such as voltage, current, temperature, SOC (state of charge), etc. Each cell module can only modify its own corresponding data identifier and cannot directly change the data of other cell modules. This avoids global data errors caused by misoperation or malicious operation, while ensuring a clear division of authority in data transmission and reducing the risk of data conflicts. In addition, the preset public data contains the attributes of all cell modules, which can facilitate the rapid location of faulty cell modules. For example, if a cell module has not updated its own data or the data is abnormal, the faulty cell module can be directly found by comparing the identifier in the preset public data.

[0045] Optionally, the attributes include voltage, temperature and fault number. The attributes of the preset public data specifically include voltage, temperature and fault number, which are key indicators of the operating status of the battery cell module. Voltage is the real-time voltage value of each battery cell in the battery cell module or the entire module, temperature is the temperature value of each battery cell in the battery cell module or the module as a whole, and fault number is the number of the fault type detected in the battery cell module. By taking voltage, temperature and fault number as the core attributes of the preset public data, the status of the battery cell module can be monitored comprehensively and in real time, and collaborative management of the entire network can be achieved through data transmission and synchronization. In particular, the addition of the fault number enables the system to quickly respond to abnormal situations and locate faulty battery cell modules, thereby significantly improving the reliability and security of the entire wireless networking structure. Specifically, the preset public data field table is shown in Table 1:

[0046] Table 1 Preset common data field table

[0047]

[0048] Optionally, the battery cell module updates the preset public data at a preset period. The preset period is the time interval for the battery cell module to update its own preset public data. After each battery cell module collects its own operating status data, it writes the operating status data into a preset public data storage area, and then synchronizes it to other battery cell modules through wireless communication. By introducing a periodic update mechanism, the battery cell module can synchronize its operating status in real time at preset time intervals, providing consistent and timely public data for the entire network. This mechanism not only improves the real-time and reliability of the system, but also provides technical support for efficient monitoring in dynamic environments. Optionally, data transmission is encrypted using the AES algorithm. AES (Advanced Encryption Standard) is a symmetric encryption algorithm that uses the same key for encryption and decryption, and is suitable for efficient and fast data transmission scenarios. The AES algorithm can operate efficiently in low-power embedded systems and is suitable for battery cell modules, which are application scenarios with high security and real-time requirements. The embodiment of the present invention greatly improves the security and data protection capabilities of wireless networking of battery cell modules by introducing AES encryption in data transmission.

[0049] The wireless networking structure of the battery modules in the embodiment of the present invention constructs a first network of battery modules in a hand-in-hand manner. The battery modules are connected one by one in a fixed order, occupying fewer resources, significantly reducing the possibility of conflicts, and improving security. At the same time, when adding or removing battery modules, only the order of wireless connections needs to be adjusted, which enhances adaptability and scalability. In addition, by introducing a second network, a multi-level wireless networking structure is provided, significantly reducing the risk of single point failures causing the entire network to fail, and helping to solve the signal conflicts and node isolation problems that may occur in large-scale battery module networks.

[0050] In order to solve the above technical problems existing in the prior art, an embodiment of the present invention further provides a battery pack, Figure 4 The schematic diagram of the structure of the battery pack according to the embodiment of the present invention is shown. Figure 4 As shown, the hardware structure of the battery cell module in the battery pack is the wireless networking structure of the battery cell module as described above.

[0051] In the battery pack of the embodiment of the present invention, a first group of networks of battery modules are constructed in a hand-in-hand manner. The battery modules are connected one by one in a fixed order, which occupies fewer resources, significantly reduces the possibility of conflicts, and improves safety. At the same time, when adding or deleting battery modules, it is only necessary to adjust the order of wireless connections, which has stronger adaptability and scalability.

[0052] In order to solve the above technical problems existing in the prior art, an embodiment of the present invention further provides a networking method of a battery module based on the wireless networking structure of the battery module as described above, comprising:

[0053] Obtain multiple battery cell modules to be networked;

[0054] Based on the wireless networking structure of the battery cell modules as described above, multiple battery cell modules to be networked are networked.

[0055] Among them, the battery cell module to be networked is the battery cell module in the battery pack.

[0056] The networking method of the embodiment of the present invention constructs the first network of battery modules in a hand-in-hand manner. The battery modules are connected one by one in a fixed order, occupying fewer resources, significantly reducing the possibility of conflict, and improving security. At the same time, when adding or deleting battery modules, it is only necessary to adjust the order of wireless connections, which has stronger adaptability and scalability.

[0057] Although the embodiments disclosed herein are as described above, the contents described herein are merely embodiments for facilitating understanding of the present invention and are not intended to limit the present invention. Any person skilled in the art may make any modifications and variations in the form and details of the embodiments without departing from the spirit and scope of the present invention. However, the scope of protection of the present invention shall remain subject to the scope defined by the appended claims.

Claims

1. A wireless networking structure of a battery module, comprising a plurality of battery modules and a first network; The first network is a ring network formed by wirelessly connecting all the battery modules in sequence; The wireless networking structure externally includes a plurality of wireless communication peripherals, each of which is wirelessly connected to all of the battery modules; The data transmission mode in the first network is bidirectional transmission between adjacent battery modules; in, The connection mode of the battery modules in the first network is hand-in-hand connection; the content of the data transmission is preset public data, and the preset public data is stored in each battery module; It also includes a second network, which includes the battery modules that are separated by a first preset number of battery modules, and the data transmission method in the second network is bidirectional transmission between the battery modules that are separated by the first preset number of battery modules; wherein the total number of the battery modules cannot be divided by the first preset number plus one, and the connection method of the battery modules in the second network is hand-in-hand connection.

2. The wireless networking structure according to claim 1, characterized in that: Also includes the third network, The third network includes the battery modules separated by a second preset number of battery modules, and the data transmission mode in the third network is bidirectional transmission between the battery modules separated by the second preset number of battery modules; The total number of the battery modules cannot be divided evenly by the second preset number plus one, and the battery modules in the third network are connected in a hand-in-hand manner.

3. The wireless networking structure according to claim 2 or 1, characterized in that: Data between different networks is backed up.

4. The wireless networking structure according to claim 1, wherein: Each of the battery cell modules includes a wireless BMS module and a plurality of battery cells.

5. The wireless networking structure according to claim 1, wherein: The content of the data transmission is preset common data, which is stored in each of the battery cell modules. The preset common data includes data identifiers of multiple attributes of all battery cell modules. Each of the battery cell modules can only modify its own corresponding data identifier.

6. The wireless networking structure according to claim 5, characterized in that: The battery cell module updates the preset common data at a preset period.

7. The wireless networking structure according to claim 1, wherein: The data transmission is encrypted using the AES algorithm.

8. A battery pack, characterized in that: The hardware structure of the battery cell module in the battery pack is the wireless networking structure of the battery cell module in any one of claims 1-7.

9. A method for networking a wireless networking structure of a battery module based on any one of claims 1 to 7, comprising: Obtain multiple battery cell modules to be networked; Based on the wireless networking structure, the multiple battery cell modules to be networked are networked.

Images