A modular lithium battery management system unit

Abstract

The utility model discloses a modularization's lithium cell management system unit, including core control board and power board, the core control board is provided with: microcontroller, and with microcontroller electricity connection's memory, charge detection circuit, bluetooth communication module, AFE rectifier acquisition circuit and starting circuit, the power board includes MOS drive circuit, MOS temperature acquisition circuit and power loop current acquisition circuit, the power board is divided into multiple specifications according to power, including 1 group MOS drive circuit or 2 to n group parallelly connected array distribution's MOS drive circuit respectively, the core control board with the power board carries out board to board stacking connection, the utility model discloses through modularization split and flexible configuration, carries out board to board stacking to core control board and power board, effectively reduces the size of BMS, and realizes the fast configuration to the rated power of lithium cell management system, communication interface etc.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery management systems, and more particularly to a modular lithium battery management system unit. Background Technology

[0002] The main differences in the current requirements for BMS functions are as follows: the amount of power supported; whether heating and heat preservation are required; whether communication functions are required; and whether the battery needs to have series and parallel connection functions.

[0003] Therefore, there is an urgent need to develop modular battery management system units that can be quickly configured to meet the requirements of the BMS, such as rated power and communication interfaces. Utility Model Content

[0004] This utility model aims to provide a modular lithium battery management system unit to solve the above-mentioned problems. The technical solution is as follows:

[0005] A modular lithium battery management system unit, including a core control board and a power board;

[0006] The core control board includes: a microcontroller, and a memory, a charging detection circuit, a Bluetooth communication module, an AFE rectifier acquisition circuit, and a power-on circuit electrically connected to the microcontroller;

[0007] The power board includes a MOS driving circuit, a synchronous MOS rectifier bridge, a MOS temperature acquisition circuit, and a power loop current acquisition circuit. The power board is divided into various specifications according to power, each including one set of synchronous MOS rectifier bridges or two to n sets of synchronous MOS rectifier bridges connected in parallel in an array, wherein 2 < n ≤ 8.

[0008] The core control board is connected to the power board via a first connector and is stacked together, and is fixed by a support component.

[0009] Furthermore, the first connector of the core control board is a pin header connector, and the power board is provided with a female header connector adapted to the first connector.

[0010] Furthermore, the support assembly consists of male and female spacers and their matching screws and nuts.

[0011] Furthermore, the power board is larger than the core control board, and in the stacked state, the core control board falls entirely within the projection range of the power board.

[0012] Furthermore, the number of synchronous MOS rectifier bridges is m×n, where 1≤m≤4.

[0013] Furthermore, it also includes a communication module for communicating with peripherals, the communication module including at least an RS485 isolated communication module and a CAN isolated communication module; the core control board is connected to the communication module through a second connector, providing at least two sets of UART communication interfaces.

[0014] Furthermore, the isolation methods of the RS485 isolation communication module and the CAN isolation communication module are optocouplers or magnetic couplers.

[0015] Furthermore, it also includes a heating module for controlling the heating film to heat and keep the battery module warm. The core control board is connected to the heating module via a third connector.

[0016] Furthermore, the control signal type of the heating module is a PWM signal.

[0017] Furthermore, it also includes a light board module, which includes a power on / off button and several LED indicator lights. The core control board is electrically connected to the light board module via a fourth connector. The power-on circuit is electrically connected to the power on / off button. The microcontroller directly drives the LED indicator lights.

[0018] Compared with the prior art, the significant features of this utility model are:

[0019] The BMS is modularly broken down into core control boards, power boards, and on-demand modules such as heating modules, communication modules, and lighting boards. The size of the BMS can be effectively reduced by stacking the core control boards and power boards board-to-board, and the rated power, communication interface, and other requirements of the BMS can be quickly configured. Attached Figure Description

[0020] Figure 1 This is a system block diagram of the BMS of this utility model;

[0021] Figure 2 This is an assembly diagram of the core control board and the 50W power board of this utility model;

[0022] Figure 3 This is an assembly diagram of the core control board and the 100W power board of this utility model;

[0023] Figure 4 This is an assembly diagram of the core control board and the 150W power board of this utility model;

[0024] Figure 5 This is a circuit diagram of the MCU and interface of the core control board of this utility model;

[0025] Figure 6 This is the circuit diagram of the power board 2c of this utility model;

[0026] Figure 7 This is a circuit diagram of the communication module of this utility model;

[0027] Figure 8 This is a circuit diagram of the heating module and lamp board module of this utility model. Detailed Implementation

[0028] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0029] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0030] Example 1

[0031] like Figure 1 As shown, this utility model provides a modular lithium battery management system unit, including a core control board 1, a power board 2, and communication modules 3, heating modules 4, and lamp board modules 5, which can be configured as needed. Wherein:

[0032] The core control board 1 is equipped with an MCU (microcontroller), and functional units such as a memory, charging detection circuit, Bluetooth communication module, AFE rectifier acquisition circuit and power-on circuit that are electrically connected to the MCU. These units provide the core services of the BMS.

[0033] In this embodiment, the Bluetooth communication module is directly integrated into the core control board 1 as a basic communication unit due to its small size and low cost.

[0034] Power board 2 mainly includes functional units such as MOS drive circuit, synchronous MOS rectifier bridge, MOS temperature acquisition circuit and power loop current acquisition circuit.

[0035] The core control board 1 has connectors 101, 102, 103, and 104 on one side, and positioning holes 105 at its four corners. The power board 2 is connected to the core control board 1 via connectors 101 and the connection is secured by support components mounted on the positioning holes 105.

[0036] In this embodiment, the connector 101 of the core control board 1 is a pin header connector, and the power board 2 is provided with a female header connector 201 that is compatible with the connector 101.

[0037] Specifically, power boards 2 are available in various specifications based on power rating, such as power boards 2a, 2b, and 2c. In this embodiment, power board 2a includes one set of synchronous MOS rectifier bridges 202, while power boards 2b and 2c include two and three sets of parallel synchronous MOS rectifier bridges 202 arranged in an array, respectively. Figures 2-4 As shown.

[0038] The power boards 2a, 2b, and 2c are all larger than the core control board 1, and are equipped with connectors 201 corresponding to connectors 101 on the core control board 1, and positioning holes 203 corresponding to positioning holes 105 on the core control board 1. In the stacked state, the core control board 1 falls entirely within the projection area of ​​the power boards 2a, 2b, and 2c.

[0039] like Figure 5 As shown, the core control board 1 provides interfaces such as active balancing interface J2 (connector 101), serial-parallel board interface J6 (connector 102), heating module interface J9 (connector 103), and button light board interface J8 (connector 104).

[0040] like Figure 6 As shown, in power board 2c, there are two MOS drive circuits, which drive the upper and lower arms of the synchronous MOS rectifier bridge respectively. The number of synchronous MOS rectifier bridges can be configured according to power requirements, typically 1-8 sets, with each set including 1-4 pairs of MOS transistors.

[0041] In this embodiment, a set of synchronous MOS rectifier bridges includes three pairs of MOS transistors to provide a rated drive capability of 50A. In this way, drive capabilities of 50W, 100W, 150W... can be achieved.

[0042] Preferably, the synchronous MOS rectifier bridge is also equipped with an overvoltage protection circuit consisting of several TVS diodes.

[0043] like Figure 6 As shown, a set of configuration resistors TYPE0 and TYPE1 (selected for soldering according to different power) connected to connector 201 (JP2) are also provided on power boards 2a, 2b and 2c. The core control board automatically identifies the specifications of the power board by detecting the level of pins 10 and 11 of connector 101.

[0044] like Figure 7As shown, in this embodiment, the communication module 3 is used for communication between the core control board and peripherals, including an RS485 isolated communication module, a CAN isolated communication module, and a LIN isolated communication module (optional). The core control board 1 is connected to the communication module 3 via connector 102. The core control board 1 provides at least two sets of UART communication interfaces, and the RS485 isolated communication module, CAN isolated communication module, and LIN isolated communication module are connected to the outside. Preferably, the isolation methods of the RS485 isolated communication module, CAN isolated communication module, and LIN isolated communication module are optical coupling, magnetic coupling, etc.

[0045] like Figure 8 As shown, in this embodiment, the heating module 4 is used to control the heating film to provide heating and heat preservation to the battery module, enabling the resistor module to recover to room temperature in a sub-zero temperature environment and operate normally. The core control board 1 is connected to the heating module 4 via connector 103 and connector J1. The lamp board module 5 includes one power button SW1 and five LED indicators. The core control board is electrically connected to the lamp board module 5 via connector 104 and connector JP1. Its power-on circuit is electrically connected to the power button SW1, and the MCU directly drives the LED indicators.

[0046] Compared with existing products, the significant features of this utility model's BMS system module are:

[0047] The BMS is modularly broken down into core control boards, power boards, and on-demand modules such as heating modules, communication modules, and lighting boards. The size of the BMS can be effectively reduced by stacking the core control boards and power boards board-to-board, and the rated power, communication interface, and other requirements of the BMS can be quickly configured.

[0048] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A modular lithium battery management system unit, characterized in that, Including the core control board and power board; The core control board includes: a microcontroller, and a memory, a charging detection circuit, a Bluetooth communication module, an AFE rectifier acquisition circuit, and a power-on circuit electrically connected to the microcontroller; The power board includes a MOS driving circuit, a MOS temperature acquisition circuit, and a power loop current acquisition circuit; the power board is divided into various specifications according to power, each including 1 group of MOS driving circuits or 2 to n groups of parallel MOS driving circuits arranged in an array, wherein 2 < n ≤ 8. The core control board is connected to the power board via a first connector and is stacked together, and is fixed by a support component.

2. The modular lithium battery management system unit as described in claim 1, characterized in that, The first connector of the core control board is a pin header connector, and the power board is provided with a female header connector that is compatible with the first connector.

3. The modular lithium battery management system unit as described in claim 1, characterized in that, The support components are male and female spacers and their matching screws and nuts.

4. The modular lithium battery management system unit as described in claim 1, characterized in that, The power board is larger than the core control board, and in the stacked state, the core control board falls entirely within the projection range of the power board.

5. The modular lithium battery management system unit as described in claim 1, characterized in that, The MOS drive circuit includes several sets of MOS-based synchronous rectifier bridges.

6. The modular lithium battery management system unit as described in claim 1, characterized in that, It also includes a communication module for communicating with peripherals, the communication module including at least an RS485 isolated communication module and a CAN isolated communication module; the core control board is connected to the communication module through a second connector, providing at least two sets of UART communication interfaces.

7. The modular lithium battery management system unit as described in claim 6, characterized in that, The RS485 isolation communication module and the CAN isolation communication module are isolated by optocoupler or magnetic coupling.

8. The modular lithium battery management system unit as described in claim 1, characterized in that, It also includes a heating module for controlling the heating film to heat and keep the battery module warm. The core control board is connected to the heating module via a third connector.

9. The modular lithium battery management system unit as described in claim 8, characterized in that, The control signal type of the heating module is PWM signal.

10. The modular lithium battery management system unit as described in claim 1, characterized in that, It also includes a light board module, which includes a power on / off button and several LED indicator lights. The core control board is electrically connected to the light board module via a fourth connector. The power-on circuit is electrically connected to the power on / off button. The microcontroller directly drives the LED indicator lights.

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