A new BMS system

Abstract

The utility model discloses a novel BMS system, including BMS master control and several groups BMS slave control, BMS master control and several groups BMS slave control are connected through wireless signal, BMS master control includes microcontroller unit one, CAN module, RS485 module, digital quantity input and output module and main node Zigbee module, CAN module, RS485 module, digital quantity input and output module, main node Zigbee module are connected through electric signal and microcontroller unit one, main node Zigbee module and several groups BMS slave control are connected through wireless communication mode, through the cooperation wireless transmission of main node Zigbee module and sub - node ZigBee module of improvement, thereby removes the communication wire harness between battery PACK, further ensures transmission weight reduction, saves the space.

Description

Technical Field

[0001] This utility model relates to the field of BMS systems, and in particular to a novel BMS system. Background Technology

[0002] With the explosive growth of the new energy industry (energy storage power stations), the battery management system (BMS), as a core component to ensure battery safety and efficiency, faces higher requirements: The shortcomings of existing BMS systems include: 1. Wiring engineering issues: Weight and space: High-voltage wiring harnesses and signal lines can exceed 200 meters in a 100-cell battery pack, encroaching on battery space; High cost: Wiring harnesses and connectors account for 15%-25% of the BMS hardware cost; Complex assembly: Manual wiring is prone to errors, and automated assembly is difficult. 2. Reliability risks: Connector oxidation and vibration loosening can lead to contact failure; aging or compression of the wiring harness can cause short circuits / open circuits. 3. Insufficient flexibility: Battery pack layout is limited by wiring paths, making it difficult to achieve irregular designs; Module replacement requires physically disconnecting the wiring harness, hindering rapid maintenance. 4. Expansion limitations: Adding sensors requires rewiring, and high-density monitoring (such as individual cell temperature control) cannot be supported.

[0003] Therefore, in order to solve the above problems, how to design a new type of BMS system is a technical problem that the industry urgently needs to solve. Utility Model Content

[0004] The purpose of this invention is to provide a novel BMS system to solve the problems of complex wiring harnesses and maintenance bottlenecks mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A novel BMS system includes a BMS master controller and several groups of BMS slave controllers. The BMS master controller and the groups of BMS slave controllers are connected via wireless signals. The BMS master controller includes a microcontroller unit, a CAN module, an RS485 module, a digital input / output module, and a master node Zigbee module. The CAN module, RS485 module, digital input / output module, and master node Zigbee module are connected to the microcontroller unit via electrical signals. The master node Zigbee module and the groups of BMS slave controllers are connected via wireless communication.

[0006] Preferably, the BMS slave controller includes a microcontroller unit two, a sub-node Zigbee module, and a data acquisition module. The sub-node Zigbee module and the data acquisition module are connected to the microcontroller unit two via electrical signals.

[0007] Preferably, the acquisition module includes a voltage acquisition module and a temperature acquisition module.

[0008] Preferably, the system further includes several groups of battery cells, which are connected to the BMS via a data acquisition module to receive control signals.

[0009] Preferably, the BMS master controller establishes a wireless communication network with the BMS slave controller's child node ZigBee modules through the master node ZigBee module, thereby realizing data interaction between the master station and the slave station.

[0010] The beneficial effects of this utility model are: 1. By switching to wireless transmission using a combination of master node Zigbee modules and child node ZigBee modules, the communication wiring between battery packs is removed, further ensuring weight reduction and space saving in transmission.

[0011] 2. By using the cooperation of the master node Zigbee module and the child node ZigBee module for wireless transmission, the cost of traditional wire harness materials and connectors is reduced, and the manual assembly time is decreased, thereby ensuring a reduction in the overall BMS cost.

[0012] 3. Furthermore, the cooperation between the master node Zigbee module and the child node ZigBee module for wireless transmission eliminates the risk of connector failure. The Zigbee mesh network supports self-healing routing (a single point of failure does not affect the whole network).

[0013] 4. Furthermore, the number of battery cells can be increased or decreased at will, and no additional communication harness processing is required after the increase or decrease. Attached Figure Description

[0014] Figure 1 This is a system diagram of an embodiment of the present utility model; Figure 2 This is an embodiment of the present utility model. Figure 1 Cross-sectional view; Figure 3 This is an embodiment of the present utility model. Figure 1 Cross-sectional view. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] See Figures 1-3This utility model provides a novel BMS system, including a BMS master controller and several groups of BMS slave controllers. The BMS master controller and the several groups of BMS slave controllers are connected via wireless signals. The BMS master controller includes a microcontroller unit, a CAN module, an RS485 module, a digital input and output module, and a master node Zigbee module. The CAN module, RS485 module, digital input and output module, and master node Zigbee module are connected to the microcontroller unit via electrical signals. The master node Zigbee module and the several groups of BMS slave controllers are connected via wireless communication.

[0017] The digital input and output module includes switch inputs and active node outputs, used for linkage control and protection control.

[0018] The CAN module can transmit BMS data to third-party devices (EMS, PCS, etc.) via the CAN protocol.

[0019] Among them, the RS485 module can send BMS data to third-party devices (EMS, PCS, etc.) via the RS485 protocol.

[0020] The master node Zigbee module is used to receive signals.

[0021] Among them, the microcontroller unit 1 is the core of the entire system operation, which sorts and transmits data. The microcontroller unit 1 adopts the domestic chip GD32F303CBT6.

[0022] Specifically, the BMS slave controller includes a microcontroller unit two, a sub-node Zigbee module, and a data acquisition module. The sub-node Zigbee module and the data acquisition module are connected to the microcontroller unit two via electrical signals.

[0023] The data acquisition module collects the temperature and voltage parameters of the battery cells.

[0024] Among them, microcontroller unit 2 is the core of the entire system operation, which sorts and transmits data. Microcontroller unit 2 adopts the domestic chip GD32F303CBT6.

[0025] Among them, the child node Zigbee module transmits the data from the acquisition module to the master node Zigbee module in the BMS main control.

[0026] Specifically, the acquisition module includes a voltage acquisition module and a temperature acquisition module.

[0027] Specifically, the system also includes several groups of battery cells, which are connected to the BMS via a data acquisition module to receive control signals.

[0028] Specifically, the BMS master controller establishes a wireless communication network with the ZigBee modules of the master node and the ZigBee modules of the slave node of the BMS master controller to realize data interaction between the master station and the slave station.

[0029] Working principle of this utility model: (1) Data acquisition: The polling scheme is adopted. The Zigbee module of the master node in the BMS master control polls the parameters (voltage and current of the battery cell) of the BMS slave control device every 10-30 seconds.

[0030] (2) Abnormal reporting: When an abnormal situation occurs in the process of collecting voltage and temperature by the BMS slave device, it will actively report the abnormal situation and set up a separate abnormal reporting channel (to prevent data collision). The data reporting adopts a scheme of three consecutive reports to avoid the abnormal data being unable to be transmitted to the BMS master due to packet loss in wireless communication.

[0031] (3) Protection and control: After detecting abnormal data, the BMS master controller controls the on / off state of the digital output module according to the set control logic, thereby controlling the on / off state of the entire circuit. At the same time, the abnormal situation is transmitted to third-party devices (EMS, PCS, etc.) through the CAN module or RS485 module.

[0032] (4) Other linkage protection: The digital input module DI port of the BMS master can be connected through a dry contact. When the signal of the digital input module changes, the BMS master controls the on / off of the digital output module according to the set control logic, thereby controlling the on / off of the entire circuit.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel BMS system, characterized in that, The system includes a BMS master controller and several BMS slave controllers connected wirelessly. The BMS master controller includes a microcontroller unit, a CAN module, an RS485 module, a digital input / output module, and a master node Zigbee module. The CAN module, RS485 module, digital input / output module, and master node Zigbee module are connected to the microcontroller unit via electrical signals. The master node Zigbee module and the several BMS slave controllers are connected wirelessly.

2. The novel BMS system according to claim 1, characterized in that: The BMS slave controller includes a microcontroller unit two, a sub-node Zigbee module, and a data acquisition module. The sub-node Zigbee module and the data acquisition module are connected to the microcontroller unit two via electrical signals.

3. A novel BMS system according to claim 2, characterized in that: The acquisition module includes a voltage acquisition module and a temperature acquisition module.

4. A novel BMS system according to claim 2, characterized in that: The system also includes several sets of battery cells, which are connected to the BMS via a data acquisition module to receive control signals.

5. A novel BMS system according to claim 2, characterized in that: The BMS master controller establishes a wireless communication network with the ZigBee modules of the master node and the ZigBee modules of the slave nodes of the BMS slave controller to realize data interaction between the master station and the slave station.

Images