Low-string-number BMS (Battery Management System) protection board capable of automatically addressing

Abstract

The utility model discloses an automatic addressing low string number BMS protection board, which comprises a BMS protection board, the BMS protection board is provided with communication interfaces, and the communication interfaces comprise a CAN1 communication interoperability port H1, a CAN1 communication interoperability port L1, an RS485 communication interoperability port A and an S485 communication interoperability port B; the CAN1 communication interoperation port H1 is used for automatic addressing communication, and the RS485 communication interoperation port A is used for upper computer communication; the BMS protection board is further provided with a sampling interface, an NTC interface, a Bluetooth communication interface and a switch interface. The BMS protection board is provided with a P + interface and a P-interface. According to the utility model, the self address is automatically calibrated through CAN communication bus data, if a battery pack needs to be newly added or some parallel operation battery packs need to be omitted, the battery packs are connected to the CAN bus in parallel after shutdown and then are started one by one, the first starting is a host, the operation is flexible and convenient, the dynamic address editing does not need DIDO to output an input signal, wiring is reduced, and wiring is simple.

Description

Technical Field

[0001] The utility model relates to the technical field related to battery management, in particular to a low-string-number BMS protection board with automatic addressing. Background Art

[0002] BMS stands for Battery Management System. Currently, there are numerous BMS protection boards on the market, but most are designed for 8-16 battery packs. Low-string-count boards like the 4S120A are also available, but these boards generally offer simpler functionality and are suitable for 12V battery packs in applications such as AGVs, forklifts, and golf carts. Automatic addressing BMS protection boards are also available, but these are generally limited to boards with around 16 battery packs for home energy storage. Few boards with automatic addressing capabilities, such as the low-string-count 4S120A, are suitable for energy storage systems. These automatic addressing boards on the market primarily rely on DIDO input and output detection, making wiring complex. Utility Model Content

[0003] In order to solve the defects of the existing technology on the market that the automatic addressing is mainly based on DIDO input and output detection and the wiring is relatively cumbersome, the utility model provides a low-string number BMS protection board with automatic addressing.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] The utility model discloses a low-string-number BMS protection board with automatic addressing, comprising a BMS protection board. A communication interface is provided on the BMS protection board, and the communication interface comprises a CAN1 communication interoperability port H1, a CAN1 communication interoperability port L1, an RS485 communication interoperability port A, and an S485 communication interoperability port B; the CAN1 communication interoperability port H1 is used for automatic addressing communication, and the RS485 communication interoperability port A is used for upper computer communication; the BMS protection board is further provided with a sampling interface, an NTC interface, a Bluetooth communication interface, and a switch interface; and a P+ interface and a P- interface are provided on the BMS protection board.

[0006] As a preferred technical solution of the present invention, the BMS protection board is further provided with a heating interface for connecting a heating lamp.

[0007] As a preferred technical solution of the present invention, a heating plate interface for connecting a heating plate is provided on the BMS protection board.

[0008] As a preferred technical solution of the present invention, the BMS protection boards between the battery packs realize parallel communication through the CAN1 communication mutual port L1.

[0009] As a preferred technical solution of the present invention, the BMS protection boards between the battery packs realize parallel connection on the battery pack power lines through the P+ interface and the P- interface.

[0010] As an optimal technical solution of the present invention, the BMS protection board is further provided with a CAN2 communication interoperable port L2 and a CAN2 communication interoperable port H2.

[0011] The beneficial effects of the utility model are:

[0012] In this type of automatically addressed low-string BMS protection board, the BMS protection board automatically calibrates its own address through the CAN communication bus data via the CAN1 communication interoperability port H1. If you need to add a new battery pack or reduce some parallel battery packs, shut down and connect them in parallel to the CAN bus and then start them one by one. The first one to start is the host. It is flexible and convenient to operate, supports Bluetooth module, and can be connected to the mobile phone Bluetooth APP to view BMS data and control in time; supports heating function, can identify charger heating and parallel Bluetooth APP can control BMS self-heating function; the utility model does not require DIDO output and input signals for automatic addressing, reduces wiring, and is simple to connect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0014] Figure 1 This is a structural diagram of a low-string-number BMS protection board with automatic addressing in the utility model;

[0015] Figure 2 This is a schematic diagram of the parallel structure of a low-string-number BMS protection board with automatic addressing in the utility model;

[0016] Figure 3 This is a structural diagram of the communication interface of a low-string-number BMS protection board with automatic addressing in the utility model;

[0017] Figure 4 This is a schematic diagram of the working process of a low-string-number BMS protection board with automatic addressing in the utility model;

[0018] Figure 5 The utility model is a partial circuit diagram of a low-string-number BMS protection board with automatic addressing.

[0019] In the figure: 1. BMS protection board; 2. Communication interface; 201. CAN1 communication interoperability port H1; 202. CAN1 communication interoperability port L1; 203. RS485 communication interoperability port A; 204. S485 communication interoperability port B; 3. Sampling interface; 4. NTC interface; 5. Bluetooth communication interface; 6. Switch interface; 7. Heating interface; 8. Heating plate interface; 9. P+ interface; 10. P- interface. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0021] Example: Figure 1-5 As shown, the present invention provides an automatically addressable, low-string-count BMS protection board, comprising a BMS protection board 1. The BMS protection board 1 is provided with a communication interface 2, comprising a CAN1 communication interoperability port H1201, a CAN1 communication interoperability port L1202, an RS485 communication interoperability port A203, and an S485 communication interoperability port B204. The CAN1 communication interoperability port H1201 is used for automatic addressing communication, while the RS485 communication interoperability port A203 is used for host computer communication. The BMS protection board 1 is also provided with a sampling interface 3, an NTC interface 4, a Bluetooth communication interface 5, and a switch interface 6. The BMS protection board 1 is also provided with a P+ interface 9 and a P- interface 10. The BMS protection board 1 automatically calibrates its own address using CAN communication bus data via the CAN1 communication interoperability port H1201. If additional battery packs are needed or some parallel battery packs are removed, the board can be shut down, connected in parallel to the CAN bus, and then restarted one by one. The first unit to be powered on is the main unit, offering flexible and convenient operation. It supports Bluetooth, allowing users to connect to a mobile phone Bluetooth app for real-time BMS data and control. It also supports heating, identifying charger heating and allowing users to control the BMS self-heating function through the Bluetooth app. This automatic addressing method eliminates the need for DIDO input and output signals, reducing wiring and simplifying connections. Switch port 6 is used to turn the warning light on and off. NTC port 4 is used to connect a temperature sensor for battery temperature monitoring.

[0022] Among them, the BMS protection board 1 is also provided with a heating interface 7 for connecting a heating lamp, which is connected to the heating lamp through the heating interface and controls the heating lamp, so that the battery pack is heated and the heating status is displayed by turning the heating lamp on and off.

[0023] The BMS protection board 1 is provided with a heating plate interface 8 for connecting a heating plate, which can heat the battery pack in cold seasons to ensure that the battery pack is at a suitable temperature.

[0024] The BMS protection boards 1 between battery packs achieve parallel communication via the CAN1 communication interoperability port L1202. The BMS protection boards 1 between battery packs achieve parallel connection on the battery pack power lines via the P+ interface 9 and the P- interface 10. In the actual preparation process, the battery PACK package only needs to include a heating film, Bluetooth, a BMS protection board, battery cells and other connection materials. After the battery pack is assembled, parallel connection on the power line is achieved via P+ and P-, and communication parallelization is achieved via CAN communication, automatic addressing is achieved, and data from all slaves is obtained.

[0025] The BMS protection board 1 is also provided with a CAN2 communication interoperability port L2 and a CAN2 communication interoperability port H2, which are reserved for backup.

[0026] When working, this type of automatically addressed low-string BMS protection board, BMS protection board 1 automatically calibrates its own address through the CAN communication bus data via the CAN1 communication interoperability port H1201. If you need to add a new battery pack or reduce some parallel battery packs, shut down the machine and connect them in parallel to the CAN bus and then start them one by one. The first one to start is the host, which is flexible and convenient to operate. It supports the Bluetooth module and can be connected to the mobile phone Bluetooth APP to view the BMS data and control it in time; it supports the heating function, can identify the charger heating and the parallel Bluetooth APP can control the BMS self-heating function; the automatic addressing of this utility model does not require DIDO output and input signals, reduces wiring, and is simple to wire. After the BMSBMS protection board 1 is powered on, it will judge and write its own address, and will also continuously judge and write addresses for CAN messages during operation. The normal operation of the BMS protection board is the same as the general function of a general protection board. When a protection state appears, protection is executed, and recovery is executed after the state is restored. The specific work flow is as follows Figure 4 shown.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A low string number BMS protection board with automatic addressing, characterized in that: The invention comprises a BMS protection board (1), wherein the BMS protection board (1) is provided with a communication interface (2), wherein the communication interface (2) comprises a CAN1 communication interoperability port H1 (201), a CAN1 communication interoperability port L1 (202), an RS485 communication interoperability port A (203), and an RS485 communication interoperability port B (204); the CAN1 communication interoperability port H1 (201) is used for automatic addressing communication, and the RS485 communication interoperability port A (203) is used for upper computer communication; The BMS protection board (1) is further provided with a sampling interface (3), an NTC interface (4), a Bluetooth communication interface (5) and a switch interface (6); The BMS protection board (1) is provided with a P+ interface (9) and a P- interface (10).

2. The low-string-number BMS protection board with automatic addressing according to claim 1, characterized in that: The BMS protection plate (1) is also provided with a heating interface (7) for connecting to a heating lamp.

3. The low string number BMS protection board with automatic addressing according to claim 1 is characterized in that: The BMS protection plate (1) is provided with a heating plate interface (8) for connecting a heating plate.

4. The low-string-number BMS protection board with automatic addressing according to claim 2, characterized in that: The BMS protection boards (1) between the battery packs are connected in parallel for communication via the CAN1 communication interoperability port L1 (202).

5. The low-string-number BMS protection board with automatic addressing according to claim 1, characterized in that: The BMS protection boards (1) between the battery packs realize parallel connection on the battery pack power lines via the P+ interface (9) and the P- interface (10).

6. The low-string-number BMS protection board with automatic addressing according to claim 5, characterized in that: The BMS protection board (1) is also provided with a CAN2 communication interoperability port L2 and a CAN2 communication interoperability port H2.

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