Lead-to-lithium battery management system

Abstract

The utility model discloses a lead-modified lithium battery management system, which relates to the technical field of lithium batteries and comprises an upper computer, a master control battery management module, a transmission module and a plurality of slave control battery management modules. The slave control battery management modules are connected in series or in parallel to form a network, the upper computer is in communication connection with the master control battery management module through the transmission module, and the master control battery management module is in wireless communication connection with the slave control battery management modules through BLE Bluetooth. According to the lead-to-lithium battery management system, through BLE Bluetooth networking of the lead-to-lithium battery management system, firstly, interference is not easy to generate, the management efficiency of the battery pack is improved, the second module is provided with Bluetooth, an additional maintenance module is not needed, the cost is low, and thirdly, complex bus connection is not needed, the use is convenient and fast; and fourthly, the battery pack can be managed without approaching the battery pack, thereby being safe and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a lead-to-lithium battery management system. Background Technique

[0002] The voltages of new energy electric vehicles are 48V, 60V, 72V, etc. Multiple lead-to-lithium battery packs need to be connected in series or parallel to meet the voltage requirements. Due to the battery characteristics of lead-to-lithium batteries themselves, they cannot be overcharged or over-discharged during the charging and discharging processes, otherwise it will cause battery combustion or explosion. In different temperature conditions, the charging and discharging requirements of the batteries are also different. There are also differences in battery voltages between different battery packs. Therefore, a battery management system is required to manage the batteries. In order to charge and discharge the battery packs more safely, it is necessary to manage the charging and discharging of the battery packs on the entire network. Traditional networking methods include CAN network networking, 485 networking, etc.

[0003] In the existing BMS battery management system, the communication combination of the CAN bus is huge. There is a certain voltage difference between different battery pack subsystems. The BMS of each battery pack uses the ground of the battery pack as the reference ground of the system for data sampling of the battery pack, resulting in different ground potentials, and the connection between each other will cause great signal interference.

[0004] Therefore, the utility model uses BLE Bluetooth for networking. BLE (Bluetooth Low Energy) is a personal area network technology, which is designed for emerging applications in the fields of healthcare, sports and health, beacons, security, home entertainment, etc. Compared with classic Bluetooth, low-power Bluetooth aims to significantly reduce power consumption and cost while maintaining the same communication range. Usually, BLE can be used for both point-to-point data transmission and point-to-multipoint data transmission. By networking with low-power Bluetooth, it not only meets the requirements of power consumption and cost, but also improves the convenience of the battery management system.

[0005] When networking through the traditional CAN twisted pair method, bundling electrical connection lines will very likely cause communication failures due to interference, reducing the management efficiency. Second, networking through the CAN network increases additional costs, such as cables, CAN devices, etc. Third, the connected network structure is complex and error-prone, making it inconvenient to use. Fourth, it is difficult to maintain. For example, it involves the disassembly of CAN boxes and the connection of the bus, and it is necessary to be close to the use site, increasing the safety risk. Content of the Utility Model

[0006] The purpose of the present utility model is to provide a lead-to-lithium battery management system. By networking through the BLE Bluetooth of the lead-to-lithium battery management system, firstly, it is not easy to generate interference, improving the management efficiency of the battery pack. Secondly, the second module has built-in Bluetooth and does not require an additional maintenance module, with low cost. Thirdly, it does not require complex bus connections and is convenient to use. Fourthly, it can manage the battery pack without approaching the battery pack, being safe and reliable, and solving the problems raised in the above technical background.

[0007] To achieve the above purpose, the present utility model provides the following technical solutions: A lead-to-lithium battery management system, which includes a host computer, a main control battery management module, a transmission module, and a slave control battery management module. There are multiple slave control battery management modules, and multiple slave control battery management modules are connected in series or in parallel to form a network. The host computer is communicatively connected to the main control battery management module through the transmission module, and the main control battery management module is wirelessly communicatively connected to multiple slave control battery management modules through BLE Bluetooth.

[0008] Preferably, the lead-to-lithium battery management system further includes an external operation device, and the external operation device is communicatively connected to the host computer.

[0009] Preferably, the external operation device is an operable display screen.

[0010] Preferably, the host computer is used to read and analyze the information of the main control battery management module, and send the information to the external operation device. At the same time, it receives the packet information sent by the external operation device and sends the packet information to the main control battery management module. The host computer sends networking information to the external operation device for confirmation by technical personnel.

[0011] Preferably, the transmission module is a 485 bus or a CAN bus.

[0012] Preferably, the main control battery management module is used to monitor the data sent by the slave control battery management module, simultaneously identify the unique information of the slave control battery management module and automatically establish a connection, read the information of each slave control battery management module and send it to the host computer, and receive the packet information from the host computer and send the packet information to the slave control battery management module. The main control battery management module sends networking information to the host computer.

[0013] Preferably, the slave control battery management module is used to send its own data to the main control battery management module, simultaneously receive the packet information sent by the main control battery management module, and start the series or parallel mode. The slave control battery management module sends networking information to the main control battery management module.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] The utility model forms a network by combining wired 485 or CAN bus with wireless BLE Bluetooth; the host computer communicates with the main control through the 485 bus or CAN bus, and the main control battery management module completes communication through the main BLE Bluetooth of the main control and the slave BLE Bluetooth of the slave control battery management module. The slave control battery management module uses 4 slave control battery management modules in parallel as a group, and each group is connected in series;

[0016] For this lead-lithium battery management system, by networking through the BLE Bluetooth of the lead-lithium battery management system, first, it is not easy to generate interference, improving the management efficiency of the battery pack. Second, the module comes with Bluetooth itself, eliminating the need for an additional maintenance module and having a low cost. Third, it does not require complex bus connections, making it convenient to use. Fourth, the battery pack can be managed without getting close to it, ensuring safety and reliability. Brief Description of the Drawings

[0017] Figure 1 It is the overall principle block diagram of the utility model;

[0018] Figure 2 It is the principle block diagram of the slave control battery management module of the utility model.

[0019] The reference numerals and names in the drawings are as follows:

[0020] 1. Host computer; 2. Main control battery management module; 3. Transmission module; 4. Slave control battery management module; 5. BLE Bluetooth; 6. External operation device. Detailed Embodiment

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figure 1, an embodiment provided by the present utility model: a lead-to-lithium battery management system, which includes a host computer 1, a main control battery management module 2, a transmission module 3, and slave control battery management modules 4. A plurality of the slave control battery management modules 4 are provided, and the plurality of slave control battery management modules 4 are connected in series or in parallel to form a network. The host computer 1 is communicatively connected to the main control battery management module 2 through the transmission module 3, and the main control battery management module 2 is wirelessly communicatively connected to the plurality of slave control battery management modules 4 through BLE Bluetooth 5. The lead-to-lithium battery management system further includes an external operation device 6, and the external operation device 6 is communicatively connected to the host computer 1. In this embodiment, the external operation device 6 is an operable display screen. Through the operable display screen, technicians can view the identity information of the slave control battery management module 4 uploaded by the host computer 1 and the working information after grouping of the slave control battery management module 4, and send the grouping information into the host computer 1 according to the operations of the technicians.

[0023] Specifically, the host computer 1 is used to read and analyze the information of the main control battery management module 2, send the information to the external operation device 6, receive the grouping information sent by the external operation device 6 at the same time, and send the grouping information to the main control battery management module 2. The host computer 1 sends the networking information to the external operation device 6 for technicians to confirm.

[0024] Specifically, the transmission module 3 is a 485 bus or a CAN bus, and the communication work between the host computer 1 and the main control battery management module 2 is completed through the 485 bus or the CAN bus.

[0025] Specifically, the main control battery management module 2 is used to monitor the data sent by the slave control battery management module 4, identify the unique information of the slave control battery management module 4 and automatically establish a connection, read the information of each item of the slave control battery management module 4 and send it to the host computer 1, receive the grouping information of the host computer 1, and send the grouping information to the slave control battery management module 4. The main control battery management module 2 sends the networking information to the host computer 1.

[0026] More specifically, the main control battery management module 1 listens to the identity information uploaded by the slave control battery management module 4 via the slave BLE Bluetooth through the main BLE Bluetooth, and automatically identifies and matches according to the information, so that the main control battery management module 2 and the slave control battery management module 4 establish a connection. After the connection is established, the main control battery management module 2 uploads the information of the slave control battery management module 4 it monitors to the host computer 1. After the host computer 1 uploads the information, it receives the packet information subsequently sent by the host computer 1, and sends the packet information to the slave control battery management module 4 with which the connection is established. It uploads the identity information to the main BLE Bluetooth of the main control battery management module 2 through the slave BLE Bluetooth 5, and establishes a connection through the matching of the information. Subsequently, it receives the packet information sent by the main control battery management module 2, and each slave control battery management module 4 separately starts its own series or parallel module, performs parallel connection in groups of four, and performs series connection between different groups, thus completing the networking.

[0027] Specifically, the slave control battery management module 4 is used to send its own data to the main control battery management module 2, and at the same time receive the packet information sent by the main control battery management module 2, start the series or parallel mode, and the slave control battery management module 4 sends the networking information to the main control battery management module 2.

[0028] Please refer to Figure 2 , Figure 2 which is the principle block diagram of the slave control battery management module of the present utility model. There are 16 slave control battery management modules 4 in the figure. The 16 slave control battery management modules 4 are interconnected in series or parallel for networking. By connecting the No. 1 to No. 4 modules in parallel, the No. 5 to No. 8 modules in parallel, the No. 9 to No. 12 modules in parallel, and the No. 13 to No. 16 modules in parallel, four groups of slave control battery management module groups are formed; then the No. 1, No. 5, No. 9, and No. 13 modules with the first numbers of different groups are connected in series, so as to connect the four groups of slave control battery management modules 4 in series.

[0029] Please refer to again Figure 1 and Figure 2 Again, the host computer 1 is communicatively connected to the main control battery management module 2 through the 485 bus or the CAN bus, and the main control battery management module 2 is wirelessly communicatively connected to 16 slave control battery management modules 4 through the BLE Bluetooth 5.

[0030] In specific use, the master battery management module 2 listens and identifies the data sent from the slave BLE Bluetooth of the slave battery management module 4 through the master BLE Bluetooth 5, and identifies the unique information of the slave battery management module 4 belonging to this wireless network according to the MAC address or Bluetooth name of the slave BLE Bluetooth of the slave battery management module 4; after the master battery management module 2 identifies the information of the slave battery management module 4, it automatically establishes a connection, reads the identity, voltage, current, faults, alarms and other information of the slave battery management module 4, and sends it to the host computer 1 through the 485 bus or CAN bus; the host computer 1 reads and analyzes the information of the master battery management module 2 and displays it on the external operation device 6; the technician observes the identity information uploaded by the slave battery management module 2 through the external operation device 6, groups the slave battery management module 4, sets the working mode, etc. For example, modules 1 to 4 are set in parallel, modules 5 to 8 are set in parallel, modules 9 to 12 are set in parallel, and modules 13 to 16 are set in parallel, and then modules 1, 5, 9, and 13 are set in series to form a matrix network; after the host computer 1 finishes grouping, it sends the information to the master battery management module 2, and the master battery management module 2 sends it to each slave battery management module 4 through the master BLE Bluetooth 5; each slave battery management module 4 starts its relevant series or parallel function modules according to its own grouping information; each slave battery management module 4 feeds back the relevant networking information to the master battery management module 2, and the master battery management module 2 uploads the information to the host computer 1. After the technician confirms it through the external operation device 6, the networking is completed.

[0031] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A lead-modified lithium battery management system, characterized in that: It includes a host computer (1), a main control battery management module (2), a transmission module (3) and slave control battery management modules (4). A plurality of the slave control battery management modules (4) are provided, and the plurality of the slave control battery management modules (4) are networked in series or in parallel with each other. The host computer (1) is communicatively connected to the main control battery management module (2) through the transmission module (3), and the main control battery management module (2) is wirelessly communicatively connected to the plurality of slave control battery management modules (4) through BLE Bluetooth (5).

2. The lithium battery management system with lead modification according to claim 1, wherein: It further includes an external operation device (6), and the external operation device (6) is communicatively connected to the host computer (1).

3. The lithium battery management system with lead modification according to claim 2, characterized in that: The external operation device (6) is an operable display screen.

4. The lead-to-lithium battery management system according to claim 1, characterized in that: The host computer (1) is configured to read and analyze the information of the main control battery management module (2), and send the information to the external operation device (6). At the same time, it receives the packet information sent by the external operation device (6), and sends the packet information to the main control battery management module (2). The host computer (1) sends networking information to the external operation device (6) for confirmation by technicians.

5. The lead-to-lithium battery management system according to claim 1, characterized in that: The transmission module (3) is a 485 bus or a CAN bus.

6. The lead-to-lithium battery management system according to claim 1, wherein: The main control battery management module (2) is configured to monitor the data sent by the slave control battery management module (4), identify the unique information of the slave control battery management module (4) and automatically establish a connection, read the information of each slave control battery management module (4) and send it to the host computer (1), and receive the packet information from the host computer (1), and send the packet information to the slave control battery management module (4). The main control battery management module (2) sends networking information to the host computer (1).

7. A lead-converted lithium battery management system according to claim 1, characterized in that: The slave control battery management module (4) is configured to send its own data to the main control battery management module (2), receive the packet information sent by the main control battery management module (2) at the same time, start the series or parallel mode, and the slave control battery management module (4) sends networking information to the main control battery management module (2).

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