Modularized practical training set for power battery management system

Abstract

The utility model relates to the technical field of power battery management system teaching equipment, and discloses a power battery management system modularized practical training set which comprises a power battery pack, a BMS battery management main control board, a high-voltage distribution box, a charging module, a discharging module and a parameter display module. A battery module in the power battery pack is electrically connected with the BMS battery management main control board, contactors in the high-voltage distribution box are connected with the BMS battery management main control board, the charging module and the discharging module are connected with the corresponding contactors respectively, and the parameter display module receives signals of the BMS battery management main control board. According to the practical training set, through modular design, the modules cooperate with one another, and the working states of a power battery and a management system can be comprehensively simulated. All the modules can be flexibly combined, and diversified teaching requirements are met. The integrated and modular design not only reduces the overall cost of the practical training set equipment, but also can provide a wider and more convenient practical training operation space for students, and remarkably improves the practical training efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery management system teaching equipment technical field, concretely is a kind of power battery management system modularized practical training set. BACKGROUND

[0002] Under the background of the rapid development of new energy vehicle industry, the market demand for talents related to new energy vehicles shows a sustained growth trend.Power battery, as the core component of modern new energy vehicles, plays a vital role in the talent training system of new energy electric vehicle development, production and service field.Among them, the knowledge training of power battery and power management system is one of the key links of talent training in this field.

[0003] However, the existing practical training teaching equipment has many shortcomings.On the one hand, many practical training equipment has single function, and cannot fully show the complex working principle and various operating conditions of power battery and management system.On the other hand, the structure of the equipment is not flexible, the connection and replacement between components are difficult, and it is difficult to meet the needs of different teaching contents and levels.In addition, some practical training equipment adopts the form of bench, which is high in cost and not conducive to large-scale popularization and use.Therefore, it is urgent to develop a power battery and management system modularized practical training set with reasonable structure, various functions, convenient operation and controllable cost. UTILITY MODEL CONTENT

[0004] In order to overcome the problems in the related art, the utility model provides a power battery management system modularized practical training set, which realizes flexible combination and replacement of components through modular design, to meet the diversified teaching and training needs, reduce cost, and improve the practicability and universality of the equipment.

[0005] The utility model adopts the technical scheme of: a power battery management system modularized practical training set, comprising a power battery pack, a BMS battery management main control board, a high-voltage distribution box, a charging module, a discharging module and a parameter display module.

[0006] The power battery pack comprises a shell and a plurality of battery modules arranged in the shell, and the BMS battery management main control board is arranged in the shell and electrically connected with the battery modules.

[0007] The high-voltage distribution box is provided with a charging contactor, a pre-charging relay, a total positive contactor and a total negative contactor, and the BMS battery management main control board is electrically connected with the charging contactor, the pre-charging relay, the total positive contactor and the total negative contactor respectively.

[0008] The charging module is electrically connected with the charging contactor and the total negative contactor respectively, the discharging module is electrically connected with the pre-charging relay, the total positive contactor and the total negative contactor respectively, and the parameter display module is signal connected with the BMS battery management main control board.

[0009] Further, the BMS battery management main control board is provided with a communication interface, a contactor control interface, a power battery power input interface, a power battery power output interface and a main control board working power supply interface.

[0010] The parameter display module is signal connected with the BMS battery management main control board through the communication interface, the contactor control interface is control connected with the charging contactor, the pre-charging relay, the total positive contactor and the total negative contactor respectively, and the power battery power input interface is electrically connected with the battery module.

[0011] The power battery power output interface includes a power battery power output positive pole and a power battery power output negative pole, the power battery power output positive pole is electrically connected with the charging contactor, the pre-charging relay and the total positive contactor respectively, and the power battery power output negative pole is electrically connected with the total negative contactor.

[0012] Further, it further includes a first power supply, the charging contactor, the pre-charging relay, the total positive contactor and the total negative contactor all include a coil and a normally open main contact, the contactor control interface includes a charging contactor control interface, a pre-charging relay control interface, a total positive contactor control interface and a total negative contactor control interface, the charging module includes a first charging positive pole and a first charging negative pole, and the discharging module includes a first discharging positive pole and a first discharging negative pole.

[0013] One end of the coil of the charging contactor is connected with the negative pole of the first power supply, the other end is connected with the charging contactor control interface, one end of the main contact of the charging contactor is electrically connected with the power battery power output positive pole, and the other end is electrically connected with the first charging positive pole.

[0014] Further, one end of the coil of the pre-charging relay is connected with the negative pole of the first power supply, the other end is connected with the pre-charging relay control interface, one end of the main contact of the pre-charging relay is electrically connected with the power battery power output positive pole, and the other end is electrically connected with the first discharging positive pole after being connected with a pre-charging resistor in series.

[0015] Further, one end of the coil of the total positive contactor is connected with the negative pole of the first power supply, the other end is connected with the total positive contactor control interface, one end of the main contact of the total positive contactor is electrically connected with the power battery power output positive pole, and the other end is electrically connected with the first discharging positive pole.

[0016] Further, one end of the coil of the total negative contactor is connected with the negative pole of the first power supply, and the other end is connected with the total negative contactor control interface, one end of the main contact of the total negative contactor is connected with the negative pole of the power battery power supply output, and the other end is respectively connected with the first charging negative pole and the first discharging negative pole.

[0017] Further, the battery module includes a plurality of battery monomers, the battery module is provided with a first output port, the battery monomers in the battery module are connected in series through a PCB board, and then connected with the first output port, the first output port is connected with the power battery power input interface.

[0018] Further, the BMS battery management main control board is provided with an information acquisition interface, the information acquisition interface includes a temperature sensor signal pin, a current sensor signal interface and a voltage acquisition interface, the voltage acquisition interface includes a P2+ pin and a P2- pin.

[0019] A plurality of temperature sensors are arranged in the battery module, the temperature sensors are connected with the temperature sensor signal pin on the BMS battery management main control board, a current sensor is connected in series in the loop between the power battery power supply output negative pole and the total negative contactor, the current sensor is connected with the current sensor signal interface, the P2+ pin is connected in the loop between the main contact of the total positive contactor and the first discharging positive pole, and the P2- pin is connected in the loop between the main contact of the total negative contactor and the first discharging negative pole.

[0020] Further, the charging module includes a vehicle-mounted charger and a vehicle-mounted charging gun, the vehicle-mounted charger is provided with a direct current output interface, an alternating current input interface, a CAN2H interface and a CAN2L interface, and the vehicle-mounted charging gun is provided with a CP interface and a CC interface.

[0021] The direct current output interface includes a direct current output positive pole and a direct current output negative pole, the direct current output positive pole is connected with the main contact of the charging contactor, and the direct current output negative pole is connected with the main contact of the total negative contactor; the alternating current input interface is connected with the vehicle-mounted charging gun.

[0022] The communication interface includes a CAN2H charging interface, a CAN2L charging interface, a CP charging interface and a CC charging interface, the CAN2H charging interface is connected with the CAN2H interface in signal connection, the CAN2L charging interface is connected with the CAN2L interface in signal connection, the CP charging interface is connected with the CP interface in signal connection, and the CC charging interface is connected with the CC interface in signal connection.

[0023] Further, the communication interface further includes a CAN1H debugging interface, a CAN1L debugging interface and a touch screen interface, the parameter display module includes a touch screen, a CAN box and an upper computer system, the touch screen is in signal connection with the touch screen interface, the CAN1H debugging interface and the CAN1L debugging interface are in signal connection with the CAN box, and the CAN is in signal connection with the upper computer system.

[0024] The utility model discloses power battery management system modularization practical training set has following technical effect: (1) by integrating power battery package, BMS battery management main control board, high voltage distribution box, charging module, discharging module and parameter display module, a complete set of battery management system is built to simulate all kinds of conditions of power battery and management system in actual operation in all directions.Power battery package simulates real power supply, BMS battery management main control board gathers and handles power battery information, high voltage distribution box controls voltage and current distribution, charging module simulates charging process, discharging module simulates discharging process, and parameter display module displays feedback data in real time.In this way, teachers can more completely and clearly teach the operation process and operation state of power battery and management system with the aid of the practical training set, students can more deeply understand the complex principle of power battery and management system and recognize various working conditions.

[0025] (2) each module is relatively independent and is connected through a specific interface, and the connection mode is convenient and standard.In the teaching process, each module can be freely combined according to different teaching needs.A variety of contactors are integrated in the high voltage distribution box, and are independently led out to the BMS battery management main control board through the control interfaces of the contactors.Teachers can control the on-off of different contactors in the high voltage distribution box through the BMS battery management main control board, thereby simulating different circuit states, monitoring data changes in real time in combination with the parameter display module, directly showing students the charging and discharging of power battery and various fault phenomena, and meeting the needs of different teaching contents and levels.

[0026] (3) the battery module and the BMS battery management main control board are integrated inside the power battery package shell, and a variety of contactors are integrated into the high voltage distribution box, the integration degree is improved, the external wire harness connection of the modules is reduced, and the assembly complexity is reduced.Through the modular design concept, each module can be placed flexibly according to the operation site condition, the connection and layout of each module are reasonably optimized, the shackles of the bench are broken, the overall cost of the practical training set equipment is reduced, more spacious and convenient practical operation space is provided for students, and the practical training efficiency is significantly improved.

[0027] Other features and advantages of the utility model will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is a simplified diagram of the overall structure of a modular training kit for a power battery management system, according to an exemplary embodiment.

[0030] Figure 2 This is a simplified diagram of the overall structure of a power battery pack in a modular training kit for a power battery management system, according to an exemplary embodiment.

[0031] Reference numerals: 10, Battery module; 11, First output port; 20, BMS battery management main control board; 211, Charging contactor control interface; 212, Pre-charge relay control interface; 213, Main positive contactor control interface; 214, Main negative contactor control interface; 22, Power battery power input interface; 221, Temperature sensor signal pin; 231, Power battery power output positive terminal; 232, Power battery power output negative terminal; 24, Current sensor signal interface; 251, P2+ pin; 252 1. P2 pin; 26. Main control board power supply interface; 27. Touch screen interface; 30. High voltage distribution box; 31. Charging contactor; 32. Pre-charge relay; 321. Pre-charge resistor; 33. Main positive contactor; 34. Main negative contactor; 40. Charging module; 41. On-board charger; 411. DC output interface; 412. AC input interface; 42. On-board charging gun; 50. Discharge module; 61. Touch screen; 62. CAN box; 70. First power supply; 81. Temperature sensor; 82. Current sensor. Detailed Implementation

[0032] The specific embodiments disclosed herein will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this disclosure.

[0033] like Figure 1 , Figure 2As shown, it is one disclosed exemplary embodiment of the utility model. The utility model power battery management system modularization practical training set, including power battery package, BMS battery management main control board 20, high voltage distribution box 30, charging module 40, discharge module 50 and parameter display module. Power battery package includes shell and several groups of battery module 10 arranged in the shell, and BMS battery management main control board 20 is arranged in the shell and is electrically connected with battery module 10. High voltage distribution box 30 is provided with charging contactor 31, pre-charging relay 32, total positive contactor 33 and total negative contactor 34, and BMS battery management main control board 20 is electrically connected with charging contactor 31, pre-charging relay 32, total positive contactor 33 and total negative contactor 34 respectively. Charging module 40 is electrically connected with charging contactor 31 and total negative contactor 34 respectively, discharge module 50 is electrically connected with pre-charging relay 32, total positive contactor 33 and total negative contactor 34 respectively, and parameter display module is signal connected with BMS battery management main control board 20.

[0034] The utility model power battery management system modularization practical training set adopts modularization design, and the whole power battery management system is split into power battery package, BMS battery management main control board, high voltage distribution box 30, charging module 40, discharge module 50 and parameter display module. Power battery package simulates the power source of real new energy vehicle, and several groups of battery module 10 in its inside cooperate BMS battery management main control board, can simulate the performance change of power battery under different working conditions, provide real battery operation data for teaching. Various contactors in high voltage distribution box 30 simulate the on-off and distribution of vehicle high voltage circuit under the control of BMS battery management main control board, and let students intuitively understand the management mechanism of high voltage.

[0035] Modularization design makes practical training set can be flexibly combined according to different teaching needs. In basic teaching stage, the various modules can be simply connected, so that students are familiar with the basic composition and working process of the system. In advanced teaching, the module parameters or simulated faults are adjusted, such as changing the load of discharge module 50 to simulate the performance of the battery in different use scenarios, and the performance change and management strategy of the battery are explained in depth. In advanced teaching, students are guided to design experiments independently, such as adjusting the control logic of BMS battery management main control board, exploring the influence of different control strategies on the system, and meeting the learning needs of students at different levels. The modules are connected through specific interfaces, and the installation and disassembly are convenient. Students can quickly build and adjust the practical training system, and improve the teaching efficiency. At the same time, the control of BMS battery management main control board on each contactor, combined with the real-time monitoring of parameter display module, can effectively prevent dangerous situations such as overcharging, overdischarging and short circuit, and ensure the safety of the teaching process.

[0036] For example, such as Figure 1 , Figure 2 As shown in the exemplary embodiment disclosed in this utility model, the BMS battery management main control board 20 is provided with a communication interface, a contactor control interface, a power battery power input interface 22, a power battery power output interface, and a main control board working power interface 26. The parameter display module is connected to the BMS battery management main control board 20 via the communication interface. The contactor control interface is connected to the charging contactor 31, the pre-charge relay 32, the main positive contactor 33, and the main negative contactor 34 respectively. The power battery power input interface 22 is electrically connected to the battery module 10. The power battery power output interface includes a power battery power output positive terminal 231 and a power battery power output negative terminal 232. The power battery power output positive terminal 231 is electrically connected to the charging contactor 31, the pre-charge relay 32, and the main positive contactor 33 respectively, and the power battery power output negative terminal 232 is electrically connected to the main negative contactor 34.

[0037] Specifically, in the exemplary embodiment disclosed in this utility model, the modular training kit for the power battery management system also includes a first power supply 70, which outputs a voltage of 12V and is connected to the main control board's working power interface 26 to provide working voltage for the BMS battery management main control board 20.

[0038] The charging contactor 31, pre-charge relay 32, main positive contactor 33, and main negative contactor 34 all include a coil and normally open main contacts. The contactor control interface includes a charging contactor control interface 211, a pre-charge relay control interface 212, a main positive contactor control interface 213, and a main negative contactor control interface 214. The charging module 40 includes a first charging positive terminal and a first charging negative terminal, and the discharging module 50 includes a first discharging positive terminal and a first discharging negative terminal. One end of the coil of the charging contactor 31 is connected to the negative terminal of the first power supply 70, and the other end is connected to the charging contactor control interface 211. One end of the main contact of the charging contactor 31 is electrically connected to the positive terminal 231 of the power battery power output, and the other end is electrically connected to the first charging positive terminal. One end of the coil of the main negative contactor 34 is connected to the negative terminal of the first power supply 70, and the other end is connected to the main negative contactor control interface 214. One end of the main contact of the main negative contactor 34 is electrically connected to the negative terminal 232 of the power battery power output, and the other end is electrically connected to the first charging negative terminal and the first discharging negative terminal respectively.

[0039] In the utility model discloses the exemplary embodiment, the coil of charging contactor control interface 211, charging contactor 31 and the negative pole of first power supply 70 constitute positive charging control loop. Total negative contactor control interface 214, the coil of total negative contactor 34 and the negative pole of first power supply 70 constitute negative control loop. When needing to carry out power battery charging demonstration, BMS battery management main control board 20 can control charging contactor control interface 211 and total negative contactor control interface 214 and send high level, and positive charging control loop and negative control loop are turned on. When positive charging control loop is electrified, the main contact of charging contactor 31 that opens normally is closed. At this time, the loop between power battery power output positive terminal 231 and the first charging positive terminal is turned on. Similarly, when negative control loop is electrified, the main contact of total negative contactor 34 that opens normally is closed, and at this time, the loop between power battery power output negative terminal 232 and the first charging negative terminal is turned on. In this way, charging module 40 can charge the battery module 10 of power battery pack.

[0040] Specifically, in the utility model discloses the exemplary embodiment, the coil one end of precharge relay 32 is connected with the negative pole of first power supply 70, and the other end is connected with precharge relay control interface 212, and the main contact one end of precharge relay 32 is connected with power battery power output positive terminal 231, and the other end is connected with the first discharge positive terminal after being connected with precharge resistance 321. Precharge relay control interface 212, the coil of precharge relay 32 and the negative pole of first power supply 70 constitute pre-discharge control loop. Power battery power output positive terminal 231, the main contact of precharge relay 32, precharge resistance 321 and the first discharge positive terminal constitute pre-discharge loop.

[0041] The coil one end of total positive contactor 33 is connected with the negative pole of first power supply 70, and the other end is connected with total positive contactor control interface 213, and the main contact one end of total positive contactor 33 is connected with power battery power output positive terminal 231, and the other end is connected with the first discharge positive terminal. Total positive contactor control interface 213, the coil of total positive contactor 33 and the negative pole of first power supply 70 constitute discharge control loop. Power battery power output positive terminal 231, the main contact of total positive contactor 33 and the first discharge positive terminal constitute discharge loop.

[0042] When the discharge demonstration is needed, the BMS battery management master control board 20 first controls the pre-charging relay control interface 212 and the total negative contactor control interface 214 to send high level, and the pre-discharge control loop and the negative control loop are powered on. The normally open main contact of the pre-charging relay 32 and the normally open main contact of the total negative contactor 34 are closed. At this time, the pre-discharge loop is turned on, and the loop between the power battery power supply output negative terminal 232 and the first charging negative terminal is also turned on. The power battery is pre-discharged. Subsequently, the total positive contactor 33 sends high level, and the discharge control loop is powered on. The normally open main contact of the total positive contactor 33 is closed, and the discharge loop is turned on. Then, the pre-charging relay control interface 212 stops sending high level, and the pre-discharge control loop is disconnected. The main contact of the pre-charging relay 32 is disconnected, and the pre-discharge loop is disconnected. The pre-charging relay 32 plays a role in sharing the load of the total positive contactor 33, preventing the total positive contactor 33 from generating arc when attracted, and prolonging its service life.

[0043] For example, in the exemplary embodiments disclosed in the utility model, the power battery pack is provided with two groups of battery modules 10, each battery module 10 includes a plurality of battery monomers, and each battery module 10 is provided with a first output port 11. The battery monomers in each battery module 10 are connected in series through a PCB board, and then connected to the first output port 11. The first output port 11 is connected to the power battery power input interface 22. Specifically, in the embodiment, each battery module 10 includes eight square lithium iron phosphate battery monomers with the same capacity. The battery monomers are connected in series through a standardized PCB board which can be easily disassembled, and then connected to the first output port 11. The standardized PCB board and the unified first output port 11 are designed to facilitate the replacement of battery monomers or battery modules 10 of different specifications, meeting the needs of different teaching contents and levels. The battery module 10 composed of multiple battery monomers can simulate the battery performance under different working conditions. During the practical training, the battery charge-discharge characteristics test and the battery equalization management experiment can be carried out. Students can observe the charge-discharge curves of different numbers of battery monomers connected in series, analyze the performance differences of the battery module 10 under different loads, and deepen the understanding of the working principle of the power battery.

[0044] For example, as Figure 1 , Figure 2As shown, the BMS battery management main control board 20 is provided with an information acquisition interface, which includes a temperature sensor signal pin 221, a current sensor signal interface 24, and a voltage acquisition interface including a P2+ pin 251 and a P2- pin 252. The battery module 10 is provided with a plurality of temperature sensors 81, which are signal connected to the temperature sensor signal pin 221 on the BMS battery management main control board 20. A current sensor 82 is connected in series in the loop between the negative output end 232 of the power battery power supply and the general negative contactor 34, and the current sensor 82 is signal connected to the current sensor signal interface 24. The P2+ pin 251 is connected to the loop between the main contact of the general positive contactor 33 and the first discharge positive end, and the P2- pin 252 is connected to the loop between the main contact of the general negative contactor 34 and the first discharge negative end.

[0045] In the exemplary embodiment disclosed in the utility model, the signal line of the temperature sensor 81 is connected to the first output port 11. On the BMS battery management main control board 20, the temperature sensor signal pin 221 is integrated on the power battery power supply input interface 22. The temperature sensor signal pin 221 of the BMS battery management main control board is connected to the temperature sensor 81 in the battery module 10. During the practical training process, students can intuitively understand the temperature change of the battery module 10 during operation. By observing the real-time feedback of temperature data, students can learn the heating characteristics of the battery under different charging and discharging states, and understand the influence of temperature on the performance and service life of the battery. The current sensor 82 is connected in series in the loop between the negative output end 232 of the power battery power supply and the general negative contactor 34, and is connected to the current sensor signal interface 24. This allows students to clearly observe the current change during the charging and discharging process of the battery. Students can analyze the current data to understand important concepts such as the charging and discharging rate, state of charge (SOC) estimation, etc. of the battery. The P2+ pin and the P2- pin are respectively connected to the loop between the main contact of the general positive contactor 33 and the corresponding discharge end, and the loop between the main contact of the general negative contactor 34 and the corresponding discharge end. In this embodiment, the P2+ pin 251 is connected to the general positive relay output end in the high-voltage distribution box 30 through a wire, and the P2- pin 252 is connected to the general negative relay output end in the high-voltage distribution box 30 through a wire, realizing real-time monitoring of the voltage of the battery module 10. Students can observe the voltage data to understand the voltage characteristics of the battery, such as open-circuit voltage, working voltage, etc. At the same time, students can also learn the voltage threshold of battery overcharging and overdischarging, and how the BMS battery management main control board protects the battery according to the voltage condition.

[0046] For example, in the exemplary embodiments disclosed in the utility model, the charging module 40 includes the on-board charger 41 and the on-board charging gun 42, the on-board charger 41 is provided with the DC output interface 411, the AC input interface 412, the CAN2H interface and the CAN2L interface, the on-board charging gun 42 is provided with the CP interface and the CC interface. The DC output interface 411 includes the DC output positive terminal and the DC output negative terminal, the DC output positive terminal is electrically connected with the main contact of the charging contactor 31, and the DC output negative terminal is electrically connected with the main contact of the total negative contactor 34;The AC input interface 412 is electrically connected with the on-board charging gun 42. The communication interface includes the CAN2H charging interface, the CAN2L charging interface, the CP charging interface and the CC charging interface, the CAN2H charging interface is signal connected with the CAN2H interface, the CAN2L charging interface is signal connected with the CAN2L interface, the CP charging interface is signal connected with the CP interface, and the CC charging interface is signal connected with the CC interface.

[0047] The DC output interface 411 of the on-board charger 41 is connected with the charging contactor 31 and the total negative contactor 34, the AC input interface 412 is connected with the on-board charging gun 42, and the real charging connection mode of the new energy vehicle is simulated. In the practical training process, students can intuitively feel and master the connection specification and operation process of the charging gun and the vehicle charging interface by actually operating the charging gun to connect the power supply. The on-board charger 41 and the on-board charging gun 42 are signal connected with the corresponding communication interface of the BMS battery management main control board through the CAN2H interface, the CAN2L interface, the CP interface and the CC interface. By observing the signal change of the CP interface and the CC interface, students can explore the handshake signal interaction process between the charging gun and the vehicle, understand how the vehicle recognizes the connection state of the charging gun, the charging power and other information, and master the principle and mechanism of intelligent charging control.

[0048] For example, in the exemplary embodiments disclosed in the utility model, the communication interface further includes the CAN1H debugging interface, the CAN1L debugging interface and the touch screen interface 27, the parameter display module includes the touch screen 61, the CAN box 62 and the upper computer system, the touch screen 61 is signal connected with the touch screen interface 27, the CAN1H debugging interface and the CAN1L debugging interface are signal connected with the CAN box 62, and the CAN is signal connected with the upper computer system.

[0049] The CAN1H debugging interface and the CAN1L debugging interface of the communication interface, the CAN box in the parameter display module, the upper computer system and the touch screen 61 build an efficient data interaction and display system. The CAN1H debugging interface and the CAN1L debugging interface are connected with the CAN box, so that the running data of the BMS battery management main control board and other modules can be transmitted to the CAN box through the CAN bus. The upper computer system is connected with the CAN box, can receive and process a large amount of data, and can perform deep analysis and processing. The touch screen 61 is connected with the touch screen interface 27, and provides an intuitive and convenient operation interface for students. The students can view the voltage, current, temperature, SOC and other parameters of the battery in real time through the touch screen 61, and can also monitor the charging and discharging process, the state of each contactor and other information. This multi-terminal data interaction and visual display enables students to quickly obtain the system running state and deepen the understanding of the power battery management system.

[0050] For example, in the exemplary embodiments disclosed in the utility model, the discharge module 50 includes an adjustable discharge load with a power of 400W. During the discharging process, students can observe how the electrical energy released by the battery is converted into other forms of energy through the discharge load, and at the same time understand how the BMS adjusts the output power of the battery according to the change of the discharge load to realize the reasonable distribution and utilization of energy, so as to deeply understand the energy management mechanism of new energy vehicles.

[0051] The preferred embodiments of the present disclosure are described in detail above in combination with the drawings, but the present disclosure is not limited to the specific details in the above embodiments, and various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0052] In addition, it should be noted that various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present disclosure will not further describe various possible combination manners.

[0053] In addition, various different embodiments of the present disclosure can also be combined in any manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed by the present disclosure.

Claims

1. A modular training kit for a power battery management system, characterized in that, It includes a power battery pack, a BMS battery management main control board, a high-voltage power distribution box, a charging module, a discharging module, and a parameter display module; The power battery pack includes a housing and several battery modules disposed within the housing. The BMS battery management main control board is disposed within the housing and is electrically connected to the battery modules. The high-voltage distribution box is equipped with a charging contactor, a pre-charge relay, a main positive contactor, and a main negative contactor. The BMS battery management main control board is electrically connected to the charging contactor, the pre-charge relay, the main positive contactor, and the main negative contactor, respectively. The charging module is electrically connected to the charging contactor and the main negative contactor respectively, the discharging module is electrically connected to the pre-charge relay, the main positive contactor and the main negative contactor respectively, and the parameter display module is signal-connected to the BMS battery management main control board.

2. The modular training kit for the power battery management system according to claim 1, characterized in that, The BMS battery management main control board is equipped with a communication interface, a contactor control interface, a power battery power input interface, a power battery power output interface, and a main control board working power interface. The parameter display module is connected to the BMS battery management main control board via the communication interface. The contactor control interface is connected to the charging contactor, pre-charge relay, main positive contactor and main negative contactor respectively. The power battery power input interface is electrically connected to the battery module. The power battery power output interface includes a positive power output terminal and a negative power output terminal. The positive power output terminal is electrically connected to the charging contactor, the pre-charge relay, and the main positive contactor, respectively, and the negative power output terminal is electrically connected to the main negative contactor.

3. The modular training kit for the power battery management system according to claim 2, characterized in that, It also includes a first power supply. The charging contactor, pre-charge relay, main positive contactor and main negative contactor all include a coil and normally open main contacts. The contactor control interface includes a charging contactor control interface, a pre-charge relay control interface, a main positive contactor control interface and a main negative contactor control interface. The charging module includes a first charging positive terminal and a first charging negative terminal. The discharging module includes a first discharging positive terminal and a first discharging negative terminal. One end of the coil of the charging contactor is connected to the negative terminal of the first power supply, and the other end is connected to the control interface of the charging contactor. One end of the main contact of the charging contactor is electrically connected to the positive terminal of the power battery output, and the other end is electrically connected to the positive terminal of the first charging contactor.

4. The modular training kit for the power battery management system according to claim 3, characterized in that, One end of the coil of the precharge relay is connected to the negative terminal of the first power supply, and the other end is connected to the control interface of the precharge relay. One end of the main contact of the precharge relay is electrically connected to the positive terminal of the power battery output, and the other end is connected to the first discharge positive terminal after being connected in series with a precharge resistor.

5. The modular training kit for the power battery management system according to claim 3, characterized in that, One end of the coil of the main positive contactor is connected to the negative terminal of the first power supply, and the other end is connected to the control interface of the main positive contactor. One end of the main contact of the main positive contactor is electrically connected to the positive terminal of the power battery output, and the other end is electrically connected to the first discharge positive terminal.

6. The modular training kit for the power battery management system according to claim 3, characterized in that, One end of the coil of the main negative contactor is connected to the negative terminal of the first power supply, and the other end is connected to the control interface of the main negative contactor. One end of the main contact of the main negative contactor is electrically connected to the negative terminal of the power battery output, and the other end is electrically connected to the first charging negative terminal and the first discharging negative terminal respectively.

7. The modular training kit for the power battery management system according to claim 2, characterized in that, The battery module includes several battery cells. The battery module is provided with a first output port. The battery cells in the battery module are connected in series through a PCB board and then electrically connected to the first output port. The first output port is electrically connected to the power battery power input interface.

8. The modular training kit for the power battery management system according to claim 3, characterized in that, The BMS battery management main control board is equipped with an information acquisition interface, which includes a temperature sensor signal pin, a current sensor signal interface, and a voltage acquisition interface. The voltage acquisition interface includes a P2+ pin and a P2- pin. The battery module is equipped with several temperature sensors, which are connected to the temperature sensor signal pins on the BMS battery management main control board. A current sensor is connected in series in the circuit between the negative terminal of the power battery output and the main negative contactor. The current sensor is connected to the current sensor signal interface. The P2+ pin is connected to the circuit between the main contact of the main positive contactor and the first discharge positive terminal, and the P2- pin is connected to the circuit between the main contact of the main negative contactor and the first discharge negative terminal.

9. The modular training kit for the power battery management system according to claim 8, characterized in that, The charging module includes an on-board charger and an on-board charging gun. The on-board charger is equipped with a DC output interface, an AC input interface, a CAN2H interface, and a CAN2L interface. The on-board charging gun is equipped with a CP interface and a CC interface. The DC output interface includes a positive DC output terminal and a negative DC output terminal. The positive DC output terminal is electrically connected to the main contact of the charging contactor, and the negative DC output terminal is electrically connected to the main contact of the main negative contactor. The AC input interface is electrically connected to the vehicle-mounted charging gun. The communication interface includes a CAN2H charging interface, a CAN2L charging interface, a CP charging interface, and a CC charging interface. The CAN2H charging interface is connected to the CAN2H interface, the CAN2L charging interface is connected to the CAN2L interface, the CP charging interface is connected to the CP interface, and the CC charging interface is connected to the CC interface.

10. The modular training kit for the power battery management system according to claim 2, characterized in that, The communication interface also includes a CAN1H debugging interface, a CAN1L debugging interface, and a touch screen interface. The parameter display module includes a touch screen, a CAN box, and a host computer system. The touch screen is signal-connected to the touch screen interface. The CAN1H debugging interface and the CAN1L debugging interface are signal-connected to the CAN box. The CAN box is signal-connected to the host computer system.

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