Battery management system communication tool

Abstract

The utility model provides a battery management system communication tool which comprises a main control circuit, one end of the main control circuit is in communication connection with an upper computer, the other end of the main control circuit is in communication connection with one end of a communication circuit, and the other end of the communication circuit is connected with a controller through a plug-in; the communication circuit comprises a daisy chain communication circuit, a CAN communication circuit and a CAN-to-daisy chain circuit; the battery management system communication tool can perform data reading and instruction issuing on a battery pack or a certain module independently, can support mutual conversion among CAN / CANFD and daisy chain communication, is provided with a plurality of daisy chain channels, can perform data reading on a plurality of slave plates at the same time, and has the advantages of being simple in structure, convenient to operate and high in reliability. According to the invention, data reading and working state debugging can be carried out on the battery pack more conveniently, excessive charging and discharging of the battery under various working conditions are prevented, the service life of the battery in different environments is prolonged, and function testing can be carried out on the BMS.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery management and relates to a communication tooling for a battery management system. Background Art

[0002] With the rapid development of new energy vehicles, power battery technology has become more mature. The power battery pack used in new energy vehicles is composed of multiple power battery cells connected in series or in parallel, so a battery management system is generally required to manage and control the power battery pack.

[0003] As the battery capacity and density used in electric vehicles are getting higher and higher, there are more and more hazardous incidents such as battery fire or smoke. Therefore, the design and development of battery management system (BMS) for functional safety is becoming more and more necessary. The BMS system needs to have safety functions in application and ensure functional safety when a fault occurs. Functional safety is related to the characteristics of the chip used, the software and hardware architecture and the circuit topology. At the same time, the functional safety level achieved by the design must also be considered. In the existing BMS system design, the battery charge / discharge management shortens the battery life. When the battery is overheated, overcharged or over-discharged, the BMS system needs to send a signal to disconnect the bus relay. However, when the BMS system fails, this safety function will fail. The failure of the safety function may cause the actuator to execute incorrectly, leading to a dangerous situation. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides a battery management system communication tooling, which can more conveniently read the data of the battery pack and debug the working status, prevent the battery from being over-charged and over-discharged under various working conditions, extend the service life of the battery in different environments, and also perform functional testing on the BMS.

[0005] The utility model is realized by the following technical solutions:

[0006] A battery management system communication tool, comprising:

[0007] Power supply circuit, main control circuit and communication circuit;

[0008] The power supply circuit provides power for the entire battery management system communication tooling;

[0009] One end of the main control circuit is connected to the host computer for communication, the other end of the main control circuit is connected to one end of the communication circuit for communication, and the other end of the communication circuit is connected to the controller through a plug-in;

[0010] The communication circuit includes a daisy chain communication circuit, a CAN communication circuit and a CAN to daisy chain circuit;

[0011] One end of the daisy chain communication circuit, the CAN communication circuit and the CAN to daisy chain circuit is respectively connected to the main control circuit; the other end of the daisy chain communication circuit, the CAN communication circuit and the CAN to daisy chain circuit is connected to the controller through a plug-in.

[0012] Preferably, the main control circuit includes a control circuit, a power supply circuit and an MCU minimum system circuit;

[0013] The power supply circuit is connected to the power supply circuit to provide power for the control circuit and the MCU minimum system circuit;

[0014] One end of the MCU minimum system circuit is connected to one end of the control circuit, and the other end of the MCU minimum system circuit is connected to the host computer for communication; the other end of the control circuit is connected to the communication circuit.

[0015] Preferably, the MCU minimum system circuit includes an MCU chip, a reset circuit, a crystal oscillator circuit and a filter circuit; the reset circuit, the crystal oscillator circuit and the filter circuit are all electrically connected to the MCU chip; one end of the MCU chip is connected to the host computer, and the other end of the MCU chip is connected to the control circuit.

[0016] Preferably, the controller includes a master controller and a slave controller; the master controller adopts CAN communication or CANFD communication mode; the slave controller adopts daisy chain communication mode; the master controller is communicatively connected to the CAN communication circuit, and the slave controller is communicatively connected to the daisy chain communication circuit and the CAN to daisy chain circuit.

[0017] Preferably, when the battery management system is connected to the master controller and the slave controller at the same time, the CAN communication or CANFD communication message is converted into a daisy chain communication message and transmitted to the slave controller through the CAN to daisy chain circuit.

[0018] Preferably, the plug-in includes a host computer interface plug-in, a daisy chain interface plug-in and a CAN / CANFD interface plug-in; the host computer is connected to the controller through the host computer interface plug-in; the CAN communication circuit is connected to the main controller through the CAN / CANFD interface plug-in;

[0019] The CAN to daisy chain circuit and the daisy chain communication circuit are both connected to the slave controller via a daisy chain interface plug-in.

[0020] Preferably, the CAN communication circuit includes a CAN transceiver circuit and a CANFD transceiver circuit; the CAN / CANFD interface plug-in includes a CAN interface plug-in and a CANFD interface plug-in; the CAN transceiver circuit and the CANFD transceiver circuit are connected to the controller through the CAN / CANFD interface plug-in including a CAN interface plug-in and a CANFD interface plug-in respectively.

[0021] Preferably, the CAN to daisy chain circuit adopts the NXP 33665 chip; the CAN FD transceiver circuit adopts the TJA1443 chip.

[0022] Preferably, the power supply circuit includes a power supply filter anti-reverse connection circuit and an LDO voltage regulator, and the power supply filter anti-reverse connection circuit and the LDO voltage regulator are connected to the power supply circuit between the power supply and the battery management system communication tooling.

[0023] Preferably, the battery management system communication tooling is powered by an external 12V power supply.

[0024] Compared with the prior art, the utility model has the following beneficial technical effects:

[0025] The utility model provides a battery management system communication tooling, which includes a daisy chain communication circuit, a CAN communication circuit and a CAN to daisy chain circuit through a communication circuit; one end of the daisy chain communication circuit, the CAN communication circuit and the CAN to daisy chain circuit is respectively connected to a main control circuit; the other ends of the daisy chain communication circuit, the CAN communication circuit and the CAN to daisy chain circuit are connected to a controller through a plug-in. The battery management system communication tooling of the utility model can read data and issue instructions to a battery pack or a module thereof separately. By designing the daisy chain communication circuit, the CAN communication circuit and the CAN to daisy chain circuit The circuit can support the mutual conversion between CAN / CANFD communication and daisy chain communication; the utility model can have multiple daisy chain channels in the design of the CAN to daisy chain circuit, and can read data from the controller of multiple battery packs at the same time. In the face of the diversified and diversified development of BMS functions, the safety, functionality, stability and other requirements of new energy vehicles for BMS are also increasing. It can more conveniently read the data of the battery pack and debug the working status, prevent the battery from excessive charging and discharging under various working conditions, extend the service life of the battery in different environments, and also perform functional testing on the BMS. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a battery management system communication tooling. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0028] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0029] A battery management system communication tooling, such as Figure 1 As shown, including

[0030] Power supply circuit, main control circuit and communication circuit;

[0031] The power supply circuit provides power for the entire battery management system communication tooling;

[0032] One end of the main control circuit is connected to the host computer, one end of the communication circuit is connected to the main control circuit, and the other end is connected to the controller through a plug-in; the communication circuit is used to transmit data of the main control circuit to the controller; the main control circuit is used to receive battery monitoring data, analyze data and transmit data through the communication circuit, and is also used to send instructions and / or receive instructions; the controller is installed on the battery assembly;

[0033] The host computer is used to receive data acquired by the main control circuit and execution instructions issued, and issue instructions to the main control circuit;

[0034] The communication circuit includes a daisy chain communication circuit, a CAN communication circuit and a CAN to daisy chain circuit;

[0035] CAN communication circuit is used for communication in CAN or CANFD transmission mode;

[0036] The daisy chain communication circuit is used for communication in daisy chain transmission mode;

[0037] The CAN to daisy chain circuit is used to convert the CAN communication or CANFD communication received from the MCU minimum system circuit data into daisy chain communication and transmit it to the controller;

[0038] The CAN to daisy chain circuit adopts the NXP 33665 chip. The CAN to daisy chain circuit adopts the NXP 33665 chip, which converts the CAN communication or CANFD communication of the daisy chain communication circuit that receives the MCU minimum system circuit data into daisy chain communication;

[0039] The CAN communication circuit includes a CAN transceiver circuit and a CANFD transceiver circuit;

[0040] The CANFD transceiver circuit adopts a TJA1443 chip, and the output ends and input ends of multiple TJA1443 chips are connected to form an external-to-internal CANFD transceiver circuit.

[0041] The CAN transceiver circuit uses the CAN transceiver model TJA1443;

[0042] The controller includes a master controller and a slave controller;

[0043] The master controller adopts CAN communication or CANFD communication; the slave controller adopts daisy chain communication;

[0044] When the battery management system is connected to the master controller and the slave controller at the same time, the CAN communication or CANFD communication needs to be converted to daisy chain communication through the CAN to daisy chain circuit;

[0045] The main control circuit includes a control circuit, a power supply circuit, and an MCU minimum system circuit;

[0046] The power supply circuit is connected to the power supply to provide power to the main control circuit; the control circuit is connected to the communication circuit; the control circuit selects the required mode of CAN communication or daisy chain communication, transmits the instruction to the communication circuit, and switches to the required communication mode;

[0047] The control circuit is used to obtain data from the communication circuit, convert data in communication mode, and control communication; the control circuit transmits the acquired communication circuit data to the MCU minimum system circuit, extracts information and instructions after processing by the MCU minimum system circuit, and transmits them to the host computer; the host computer sends instructions to the controller to manage the battery;

[0048] The plug-in includes a host computer interface plug-in, a daisy chain interface plug-in and a CAN / CANFD interface plug-in; the host computer is connected to the controller through the host computer interface plug-in;

[0049] The CAN communication circuit is connected to the main controller via a CAN / CANFD interface plug-in;

[0050] The CAN to daisy chain circuit and the daisy chain communication circuit are both connected to the slave controller via a daisy chain interface plug-in;

[0051] The CAN / CANFD interface plug-in includes a CAN interface plug-in and a CANFD interface plug-in; the CAN transceiver circuit and the CANFD transceiver circuit are connected to the controller through the CAN / CANFD interface plug-in including the CAN interface plug-in and the CANFD interface plug-in respectively.

[0052] The power supply circuit includes a power supply filter anti-reverse connection circuit and an LDO voltage regulator; the LDO voltage regulator is used to convert the external power supply into an operating voltage, so that the power supply is more stable, neither overvoltage nor undervoltage; the power supply filter anti-reverse connection circuit is used to eliminate interference with the external power supply, so that the power supply is more stable; the power supply circuit is powered by an external 12V power supply.

[0053] LDO regulator is a low dropout linear regulator;

[0054] The MCU minimum system circuit includes an MCU chip, a reset circuit, a crystal oscillator circuit and a filter circuit; the reset circuit, the crystal oscillator circuit and the filter circuit are all electrically connected to the MCU chip; one end of the MCU chip is connected to the host computer, and the other end of the MCU chip is connected to the control circuit.

[0055] The MCU chip is used for program execution, instruction issuance and data collection;

[0056] The crystal oscillator circuit is used to provide a clock signal to the MCU chip;

[0057] The reset circuit is to prevent the program from going astray, including manual reset and automatic reset;

[0058] The filter circuit is to prevent the MCU chip from being disturbed and provide stability;

[0059] MCU chip contains functions such as processor, memory, input / output interface, etc. MCU chip is usually composed of microprocessor circuit (CPU), memory circuit (Memory), input / output (I / O) port, timer / counter, serial communication interface, etc.

[0060] The microprocessor circuit includes a controller, an arithmetic logic circuit (ALU), and registers. The controller is responsible for the execution of instructions and data processing of the microcontroller, the arithmetic logic circuit is responsible for the arithmetic and logical operations of the microcontroller, and the register is used to store temporary data and address information;

[0061] The memory circuit is the data storage part of the microcontroller, including random access memory (RAM) and read-only memory (ROM). RAM is used to store programs and data, while ROM is used to store programs and constant data, etc.

[0062] The input / output port is the interface for the microcontroller to exchange data with external devices, including the general-purpose input / output (GPIO) port, analog input / output port, timer / counter output port, etc.

[0063] Timer / counter is used to generate timing, delay and counting functions, and is an important module commonly used in microcontrollers.

[0064] Serial communication interfaces (such as UART, SPI, I2C, etc.) are used for serial communication between microcontrollers and other devices, and are often used in applications such as data transmission and control.

[0065] The crystal oscillator circuit consists of a crystal oscillator and a voltage regulator circuit, which provides the MCU chip with the clock signal required for operation;

[0066] A crystal resonator is a component that can generate a resonant frequency of a high-precision electrical signal. It is usually composed of a quartz crystal and electrodes. The voltage regulator circuit is used to provide a stable voltage for the crystal oscillator to ensure the accuracy and stability of the clock signal generated by the crystal oscillator.

[0067] The reset circuit is used to ensure that the MCU chip can start normally when powered on or reset. The reset circuit is usually composed of a reset circuit chip and reset circuit components.

[0068] The reset circuit chip is a component that can detect the power supply voltage and reset signal of the MCU chip. It can reset the MCU chip when the power supply voltage of the microcontroller is lower than a certain value or the reset signal appears.

[0069] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or circuits is not necessarily limited to those steps or circuits clearly listed, but may include other steps or circuits that are not clearly listed or are inherent to these processes, methods, products or devices.

[0070] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time.

[0071] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present utility model. The terms used in the specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more related listed items. The above is only a preferred embodiment of the present utility model and does not impose any formal restrictions on the present utility model; any ordinary technician in the industry can smoothly implement the present utility model as shown in the drawings of the specification and described above; however, any technician familiar with the profession, without departing from the scope of the technical solution of the present utility model, makes some changes, modifications and equivalent changes of the technical content disclosed above, which are equivalent embodiments of the present utility model; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present utility model are still within the scope of protection of the technical solution of the present utility model.

Claims

1. A battery management system communication tooling, characterized in that: include, Power supply circuit, main control circuit and communication circuit; The power supply circuit provides power for the entire battery management system communication tooling; One end of the main control circuit is connected to the host computer for communication, the other end of the main control circuit is connected to one end of the communication circuit for communication, and the other end of the communication circuit is connected to the controller through a plug-in; The communication circuit includes a daisy chain communication circuit, a CAN communication circuit and a CAN to daisy chain circuit; One end of the daisy chain communication circuit, the CAN communication circuit and the CAN to daisy chain circuit is respectively connected to the main control circuit; the other end of the daisy chain communication circuit, the CAN communication circuit and the CAN to daisy chain circuit is connected to the controller through a plug-in.

2. A battery management system communication tooling according to claim 1, characterized in that: The main control circuit includes a control circuit, a power supply circuit and an MCU minimum system circuit; The power supply circuit is connected to the power supply circuit to provide power for the control circuit and the MCU minimum system circuit; One end of the MCU minimum system circuit is connected to one end of the control circuit, and the other end of the MCU minimum system circuit is connected to the host computer for communication; the other end of the control circuit is connected to the communication circuit.

3. A battery management system communication tooling according to claim 2, characterized in that: The MCU minimum system circuit includes an MCU chip, a reset circuit, a crystal oscillator circuit and a filter circuit; the reset circuit, the crystal oscillator circuit and the filter circuit are all electrically connected to the MCU chip; one end of the MCU chip is connected to the host computer, and the other end of the MCU chip is connected to the control circuit.

4. A battery management system communication tooling according to claim 1, characterized in that: The controller includes a master controller and a slave controller; the master controller adopts CAN communication or CANFD communication mode; the slave controller adopts daisy chain communication mode; the master controller is communicatively connected to the CAN communication circuit, and the slave controller is communicatively connected to the daisy chain communication circuit and the CAN to daisy chain circuit.

5. A battery management system communication tooling according to claim 4, characterized in that: When the battery management system is connected to the master controller and the slave controller at the same time, the CAN communication or CANFD communication message is converted into a daisy chain communication message through the CAN to daisy chain circuit and transmitted to the slave controller.

6. A battery management system communication tooling according to claim 4, characterized in that: The plug-in includes a host computer interface plug-in, a daisy chain interface plug-in and a CAN / CANFD interface plug-in; the host computer is connected to the controller through the host computer interface plug-in; the CAN communication circuit is connected to the main controller through the CAN / CANFD interface plug-in; The CAN to daisy chain circuit and the daisy chain communication circuit are both connected to the slave controller via a daisy chain interface plug-in.

7. A battery management system communication tooling according to claim 6, characterized in that: The CAN communication circuit includes a CAN transceiver circuit and a CANFD transceiver circuit; the CAN / CANFD interface plug-in includes a CAN interface plug-in and a CANFD interface plug-in; the CAN transceiver circuit and the CANFD transceiver circuit are connected to the controller through the CAN / CANFD interface plug-in including a CAN interface plug-in and a CANFD interface plug-in respectively.

8. The battery management system communication tooling according to claim 1, characterized in that: The CAN to daisy chain circuit adopts the NXP 33665 chip; the CAN FD transceiver circuit adopts the TJA1443 chip.

9. A battery management system communication tooling according to claim 1, characterized in that: The power supply circuit includes a power supply filter anti-reverse connection circuit and an LDO voltage regulator, and the power supply filter anti-reverse connection circuit and the LDO voltage regulator are connected to the power supply circuit between the power supply and the battery management system communication tooling.

10. A battery management system communication tooling according to claim 1, characterized in that: The battery management system communication tooling is powered by an external 12V power supply.

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