Battery system teaching platform based on simulated battery and its implementation method

Abstract

The present invention belongs to the technical field of battery system teaching, and relates to a battery system teaching platform based on simulated batteries and an implementation method thereof, wherein the teaching platform comprises: a simulated battery module, a battery management system, a total positive relay, a total negative relay, a pre-charge relay, a pre-charge resistor, a shunt, a battery current simulation unit, a temperature simulation unit, a battery total voltage simulation unit, a fault setting unit, a maintenance switch, a high-voltage wiring harness, a collection wiring harness, a measurement panel, a power supply unit, an output terminal, a bench and a host computer. The technical solution of the present application can complete the teaching of battery system principles, battery system fault analysis and processing teaching, and battery system operation and maintenance teaching tasks, and the teaching process is safe, comprehensive, economical and reliable.

Description

Technical Field

[0001] The invention belongs to the technical field of battery system teaching, and relates to a battery system teaching platform based on simulated batteries and an implementation method thereof. Background Art

[0002] With the rapid development of new energy vehicles around the world, my country's new energy vehicle production has accounted for a large proportion of the world. With the increase in the number of domestic electric vehicles, the requirements for new energy vehicle operation and maintenance have increased. The battery system is the core component of new energy vehicles. As it is an emerging industry, and the battery system is relatively complex and highly professional, my country's teaching of battery systems is in its infancy, which seriously restricts the development of the electric vehicle operation and maintenance market.

[0003] At present, domestic battery system teaching mainly uses physical batteries as the main body of teaching, but the use of physical batteries has problems such as poor safety, difficulty in transportation, storage and maintenance. Physical batteries have poor anti-abuse ability; if improperly operated, it will cause permanent damage to the battery and personal injury to the test personnel. Physical batteries cannot simulate extreme conditions of batteries such as overcharging, over-discharging and short circuit. The characteristics of physical batteries change with the rate, and the experimental process needs to be equipped with expensive battery charging and discharging equipment, the platform is complex, and the investment is large. Physical batteries age during use, so the experimental process cannot be repeated many times. The electrical characteristics of physical batteries on different time scales also require a lot of resources.

[0004] The battery system teaching platform based on simulated batteries involved in the present invention adopts simulated batteries. While fully simulating the appearance and various characteristics of real batteries, it has great advantages in teaching content, safety and cost compared with real batteries, solves the above-mentioned shortcomings of using real batteries, and has great social and economic benefits. Summary of the invention

[0005] The purpose of the present invention is to provide a battery system teaching platform based on simulated batteries, which can complete the teaching of battery system principles, battery system fault analysis and processing, and battery system operation and maintenance, and the teaching process is safe, comprehensive, economical and reliable. The specific technical scheme is as follows:

[0006] A battery system teaching platform based on simulated batteries, comprising: a plurality of simulated battery modules 1, a battery management system 3, a total positive relay 4, a total negative relay 8, a pre-charge relay 5, a pre-charge resistor 6, a shunt 9, a battery current simulation unit 13, a temperature simulation unit 14, a battery total voltage simulation unit 16, a fault setting unit 15, a maintenance switch 2, a measurement panel 12, a power supply unit 10, an output terminal 7, a stand 19 and a host computer 11;

[0007] The plurality of simulated battery modules 1, the battery management system 3, the total positive relay 4, the total negative relay 8, the pre-charge relay 5, the pre-charge resistor 6, the shunt 9, the battery current simulation unit 13, the temperature simulation unit 14, the battery total voltage simulation unit 16, the fault setting unit 15, the maintenance switch 2, the measurement panel 12, the power supply unit 10, the output terminal 7 and the host computer 11 are all fixed on the stand 19;

[0008] The simulated battery module 1 is connected to one end of the shunt 9, the other end of the shunt 9 is connected to one end of the total negative relay 8, the other end of the total negative relay 8 is connected to one end of the output terminal 7, the other end of the output terminal 7 is connected to one end of the pre-charging resistor 6 and one end of the total positive relay 4, the other end of the pre-charging resistor 6 is connected to one end of the pre-charging relay 5, the other end of the pre-charging relay 5 is connected to the other end of the total positive relay 4, and the other end of the total positive relay 4 is connected to the other end of the simulated battery pack 1;

[0009] The simulated battery module 1, the shunt 9, the total negative relay 8, the output terminal 7, the pre-charging resistor 6, the total positive relay 4, the pre-charging relay 5 and their connection constitute a main circuit;

[0010] The plurality of simulated battery modules 1 are connected to the host computer 11; the host computer 11 is connected to the battery management system 3, and the plurality of simulated battery modules 1 are connected to the battery management system 3;

[0011] The host computer 11 is connected to the battery current simulation unit 13; the host computer 11 is connected to the temperature simulation unit 14; the host computer 11 is connected to the fault setting unit 15; the host computer 11 is connected to the battery total voltage simulation unit 16;

[0012] The battery management system 3 is connected to the battery current simulation unit 13 and the temperature simulation unit 14;

[0013] The battery management system 3 is connected to the total positive relay 4, the total negative relay 8, the pre-charge relay 5, the pre-charge resistor 6, and the shunt 9;

[0014] The plurality of simulated battery modules 1 are connected to the maintenance switch 2;

[0015] The measuring panel 12 is connected to a plurality of simulated battery modules 1, a total positive relay 4, a total negative relay 8, a pre-charge relay 5, and a battery management system 3;

[0016] The power supply unit 10 is connected to a plurality of simulated battery modules 1, a battery management system 3, a battery current simulation unit 13, a temperature simulation unit 14, a battery total voltage simulation unit 16, and a fault setting unit 15;

[0017] The simulated battery module 1 includes: a plurality of simulated batteries;

[0018] The host computer 11 is used for:

[0019] ① Sending a simulated battery cell target voltage instruction to the simulated battery module 1 to simulate various voltage parameters of the battery system, and obtaining actual parameter data of the simulated battery cell from the simulated battery module 1;

[0020] ② Obtain the parameters such as the simulated battery cell voltage, the simulated total voltage of the simulated battery module 1 and the simulated temperature of the simulated battery module 1 collected by the battery management system 3, and send control instructions to each relay through the battery management system 3 to realize the control function of each relay;

[0021] The relays include: a total positive relay 4, a total negative relay 8 and a pre-charge relay 5;

[0022] ③ Sending a simulation current setting instruction to the battery current simulation unit 13;

[0023] ④ Sending a simulation temperature setting instruction to the temperature simulation unit 14;

[0024] ⑤ Sending fault setting instructions and fault recovery instructions to the fault setting unit 15;

[0025] ⑥ Sending a simulated battery total voltage setting instruction to the battery total voltage simulation unit 16;

[0026] ⑦ According to user needs, the measured data of the physical battery under various working conditions is used to establish a mathematical model of the simulated battery monomer, and a data array is generated and transmitted to the simulated battery module 1 to simulate the characteristic parameters of the physical battery under various working conditions;

[0027] The battery management system 3 is used for:

[0028] ① Collect and monitor parameters such as the simulated battery cell voltage of the simulated battery module 1, the total voltage of the simulated battery module 1, the temperature of the simulated battery module 1, and the state of charge of the simulated battery module 1;

[0029] ② Provide communication, safety, cell balancing and management control for the simulated battery module 1;

[0030] ③ Communicate with the host computer 11;

[0031] ④ Collect the current signal in the main circuit through the shunt 9 and simulate the current signal in the main circuit;

[0032] The simulated battery module 1 is used for:

[0033] ① receiving the simulated battery cell target voltage instruction and the simulated battery cell target voltage calibration instruction sent by the host computer 11;

[0034] ② Send the current status data of all simulated battery cells to the upper computer 11;

[0035] ③Simulate the output voltage of the physical battery module;

[0036] The output terminal 7 is used to: connect an external load, capacitor or measure the total voltage;

[0037] The main positive relay 4 is used to control the connection state between the positive terminal of the simulated battery module 1 and the output terminal 7;

[0038] The total negative relay 8 is used to control the connection state between the negative terminal of the simulated battery module 1 and the output terminal 7;

[0039] The pre-charging resistor 6 is used to slowly charge the capacitor at the output terminal 7;

[0040] The pre-charging relay 5 is used to: control the connection state of the pre-charging resistor 6 in the main circuit;

[0041] The shunt 9 is used to collect the current signal in the main circuit and transmit it to the battery management system 3;

[0042] The battery current simulation unit 13 is used to: transmit a simulated current acquisition signal to the battery management system 3 to simulate the working current of the battery system under various working conditions;

[0043] The temperature simulation unit 14 is used to: transmit a simulated temperature signal to the battery management system 3 to simulate the temperature data of the battery system under various working conditions;

[0044] The battery total voltage simulation unit 16 is used to: simulate the high voltage output by the battery system;

[0045] The fault setting unit 15 is used to: set all hardware faults that occur in the actual operation of the battery system;

[0046] The hardware failures include: line failure, insulation failure, relay failure and high voltage interlock failure, etc.;

[0047] The maintenance switch 2 is used to quickly disconnect the main circuit to protect the safety of technicians who are repairing electric vehicles under high voltage or to respond to certain unexpected events, so that maintenance work is in a safer state;

[0048] A plurality of measuring terminals are provided on the measuring panel 12;

[0049] The measuring panel 12 is used to lead the single cell voltage signal of the simulated battery of the simulated battery module 1 and the control voltage signal of each relay to separate measuring terminals, so as to facilitate the measuring operation and debugging;

[0050] The power supply unit 10 is used to provide power for the simulated battery module 1 , the battery management system 3 , the battery current simulation unit 13 , the temperature simulation unit 14 , the battery total voltage simulation unit 16 and the fault setting unit 15 .

[0051] On the basis of the above technical solution, the simulated battery module 1 is connected to one end of the shunt 9 through a high-voltage wiring harness 17, the other end of the shunt 9 is connected to one end of the total negative relay 8 through a high-voltage wiring harness 17, the other end of the total negative relay 8 is connected to one end of the output terminal 7 through a high-voltage wiring harness 17, the other end of the output terminal 7 is connected to one end of the pre-charge resistor 6 and one end of the total positive relay 4 through a high-voltage wiring harness 17, the other end of the pre-charge resistor 6 is connected to one end of the pre-charge relay 5 through a high-voltage wiring harness 17, the other end of the pre-charge relay 5 is connected to the other end of the total positive relay 4 through a high-voltage wiring harness 17, and the other end of the total positive relay 4 is connected to the other end of the simulated battery pack 1 through a high-voltage wiring harness 17;

[0052] The plurality of simulated battery modules 1 are connected to the host computer 11 via a CAN bus; the host computer 11 is connected to the battery management system 3 via a CAN bus; the host computer 11 is connected to the battery current simulation unit 13 via a CAN bus; the host computer 11 is connected to the temperature simulation unit 14 via a CAN bus; the host computer 11 is connected to the fault setting unit 15 via a CAN bus or a 485 bus; the host computer 11 is connected to the battery total voltage simulation unit 16 via a CAN bus;

[0053] A collection interface is provided on each of the plurality of simulated battery modules 1, and the battery management system 3 is connected to the collection interfaces on the plurality of simulated battery modules 1 via a collection harness 18;

[0054] The battery management system 3 is connected to the total positive relay 4, the total negative relay 8, the pre-charge relay 5, the pre-charge resistor 6, and the shunt 9 through a collection harness 18;

[0055] The plurality of simulated battery modules 1 are connected to the maintenance switch 2 via a high-voltage wire harness 17 .

[0056] On the basis of the above technical solution, the simulated battery module 1 is composed of a plurality of simulated batteries connected in series, and the simulated battery module 1 is packaged into the appearance of a physical battery module currently on the market.

[0057] On the basis of the above technical solution, the simulated battery comprises: a high-precision controllable voltage source, a controller and a battery housing;

[0058] The controllable voltage source and the controller are both installed in the battery housing;

[0059] The controllable voltage source is connected to the controller;

[0060] The controllable voltage source is used to: simulate output voltage;

[0061] The controller is used to: control the output voltage of the controllable voltage source and communicate with the host computer 11;

[0062] The simulated battery is packaged into the appearance of a real battery currently on the market.

[0063] On the basis of the above technical solution, the battery management system 3 adopts the product actually used in electric vehicles, and the battery management system 3 adopts the form of master-slave integration or one master and multiple slaves;

[0064] The total positive relay 4, the total negative relay 8, the pre-charging relay 5, the pre-charging resistor 6 and the shunt 9 are all products actually used in electric vehicles;

[0065] The battery total voltage simulation unit 16 is: a high voltage controllable power supply;

[0066] The maintenance switch 2 is a product actually used in electric vehicles.

[0067] On the basis of the above technical solution, the temperature simulation unit 14 is implemented by way one or way two;

[0068] The first mode is: the temperature simulation unit 14 is: a temperature sensor;

[0069] The temperature sensor adopts a high-precision resistor array analog temperature sensor;

[0070] A high-precision resistor array having a resistance value corresponding to the temperature is connected to the temperature detection terminal provided on the battery management system 3;

[0071] The second method is: by simulating the communication protocol of the battery management system 3 , the temperature simulation unit 14 sends corresponding temperature data to the battery management system 3 to inform the battery management system 3 of the corresponding temperature value.

[0072] Based on the above technical solution, the line faults include: setting an on-off fault between the battery management system 3 and the simulated battery module 1, setting an on-off fault between the battery management system 3 and the total positive relay 3, setting an on-off fault between the battery management system 3 and the pre-charging relay 5, and setting an on-off fault between the battery management system 3 and the total negative relay 8.

[0073] On the basis of the above technical solution, the measuring panel 12 leads the single cell voltage signal of the simulated battery of the simulated battery module 1, the internal total positive signal, the external total positive signal, the control voltage signal of the total positive relay 4, the control voltage signal of the total negative relay 8, the control voltage signal of the pre-charge relay 5 and the high-voltage interlock signal to the measuring terminal of the measuring panel 12, which is convenient for measurement operation and debugging;

[0074] The internal total positive signal is drawn from the input end of the total positive relay 4;

[0075] The external total positive signal is drawn from the output end of the total positive relay 4;

[0076] The high-voltage interlock signal is led out from the response terminal of the battery management system 3 .

[0077] A method for implementing a battery system teaching platform comprises the following steps:

[0078] Step S01, according to user needs, a mathematical model of a simulated battery cell is established in the host computer 11 based on the data actually measured under various working conditions of the physical battery, and a data array is generated;

[0079] Step S02: The user sets the operating characteristic parameters and fault status of the battery on the monitoring interface of the host computer 11;

[0080] Step S03, the host computer 11 sends a simulated battery cell target voltage instruction to the simulated battery module 1;

[0081] Step S04: According to user requirements, the host computer 11 sends a simulation current setting instruction to the battery current simulation unit 13;

[0082] Step S05: According to user requirements, the host computer 11 sends a simulation temperature setting instruction to the temperature simulation unit 14;

[0083] Step S06: According to user requirements, the host computer 11 sends a simulated battery total voltage setting instruction to the battery total voltage simulation unit 16;

[0084] Step S07, the host computer 11 obtains the parameters such as the simulated battery cell voltage of the simulated battery module 1, the simulated total voltage of the simulated battery module 1 and the simulated temperature of the simulated battery module 1 collected by the battery management system 3 (i.e., reads the battery system status information from the battery management system 3);

[0085] Step S08: According to user requirements, the host computer 11 establishes a fault model and generates a fault code group;

[0086] Step S09 : The host computer sends a fault setting code to the fault setting unit 15 .

[0087] The beneficial technical effects of the present invention are as follows:

[0088] The present invention provides a battery system teaching platform based on simulated batteries, which can complete the battery system principle teaching, battery system fault analysis and processing teaching, battery system operation and maintenance teaching tasks, and the teaching process is safe, comprehensive, economical and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] The present invention has the following accompanying drawings:

[0090] Figure 1 A schematic structural block diagram of a battery system teaching platform provided by an embodiment of the present invention is shown.

[0091] Figure 2 A schematic flow chart of a method for implementing a battery system teaching platform provided by an embodiment of the present invention is shown.

[0092] Reference numerals:

[0093] 1. Simulated battery module; 2. Maintenance switch; 3. Battery management system; 4. Total positive relay; 5. Pre-charge relay; 6. Pre-charge resistor; 7. Output terminal; 8. Total negative relay; 9. Shunt; 10. Power supply unit; 11. Host computer; 12. Measurement panel; 13. Battery current simulation unit; 14. Temperature simulation unit; 15. Fault setting unit; 16. Battery total voltage simulation unit; 17. High-voltage wiring harness; 18. Collection wiring harness; 19. Test bench. DETAILED DESCRIPTION

[0094] The following disclosure provides many different implementation methods or examples for implementing the technical solution of the present application. The specific embodiments of the components or arrangements described below illustrate the present invention in detail. Of course, these examples are not intended to limit the present invention.

[0095] References throughout this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention. Thus, the phrases "in one embodiment" or "in an embodiment" appearing in various places in the specification do not necessarily all refer to the same embodiment. In addition, based on the disclosure of the present invention, it will be apparent to those skilled in the art that, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0096] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0097] The present invention may be embodied in various forms, some examples of which will be described below.

[0098] Figure 1 FIG. 1 shows a schematic structural block diagram of a battery system teaching platform provided by an embodiment of the present invention, wherein the thick black line represents the main circuit, and the thin black line represents the control and sampling circuit. Figure 1 As shown, the battery system teaching platform based on simulated battery includes: simulated battery module 1, battery management system 3, total positive relay 4, total negative relay 8, pre-charge relay 5, pre-charge resistor 6, shunt 9, battery current simulation unit 13, temperature simulation unit 14, battery total voltage simulation unit 16, fault setting unit 15, maintenance switch 2, high-voltage wire harness 17, acquisition wire harness 18, measurement panel 12, power supply unit 10, output terminal 7, test bench 19 and host computer 11.

[0099] In this embodiment, the host computer 11 is connected to the simulated battery module 1 via the CAN bus, sends the simulated battery cell target voltage setting data to the simulated battery module 1 , and obtains the actual parameter data of the simulated battery cell from the simulated battery module 1 .

[0100] In this embodiment, the host computer 11 is connected to the battery management system 3 via the CAN bus, obtains the data detected by the battery management system 3 (including: parameters such as the simulated battery cell voltage of the simulated battery module 1, the simulated total voltage of the battery module 1 and the simulated temperature of the battery module 1), and sends control instructions for each relay (including: the total positive relay 4, the total negative relay 8 and the pre-charge relay 5) to the battery management system 3 to realize the control function of each relay.

[0101] In this embodiment, the battery management system 3 is connected to the acquisition interface of the simulated battery module 1 through the acquisition harness 18 to detect the voltage data of each simulated battery cell of the simulated battery module 1 and the temperature of the simulated battery module 1 and other data.

[0102] The host computer 11 is connected to the battery current simulation unit 13 via the CAN bus, and sends a simulation current setting instruction to the battery current simulation unit 13 .

[0103] The host computer 11 is connected to the temperature simulation unit 14 via the CAN bus, and sends a simulation temperature setting instruction to the temperature simulation unit 14 .

[0104] The host computer 11 is connected to the battery total voltage simulation unit 16 via the CAN bus, and sends a simulated battery total voltage setting instruction to the battery total voltage simulation unit 16 .

[0105] The host computer 11 is connected to the fault setting unit 15 via the 485 bus, and sends a fault setting instruction to the fault setting unit 15, and the fault setting unit 15 sets the hardware fault of the battery system according to the fault setting instruction or recovers the fault according to the fault recovery instruction.

[0106] Figure 2 FIG. 1 is a flow chart showing a method for implementing a battery system teaching platform according to an embodiment of the present invention. Figure 2 As shown, the battery system teaching platform implementation method includes the following steps:

[0107] Step S01, according to user needs, a mathematical model of a simulated battery cell is established in the host computer 11 based on the data actually measured under various working conditions of the physical battery, and a data array is generated;

[0108] Step S02: The user sets the operating characteristic parameters and fault status of the battery on the monitoring interface of the host computer 11;

[0109] Step S03, the host computer 11 sends a simulated battery cell target voltage instruction to the simulated battery module 1;

[0110] Step S04: According to user requirements, the host computer 11 sends a simulation current setting instruction to the battery current simulation unit 13;

[0111] Step S05: According to user requirements, the host computer 11 sends a simulation temperature setting instruction to the temperature simulation unit 14;

[0112] Step S06: According to user requirements, the host computer 11 sends a simulated battery total voltage setting instruction to the battery total voltage simulation unit 16;

[0113] Step S07, the host computer 11 obtains the parameters such as the simulated battery cell voltage of the simulated battery module 1, the simulated total voltage of the simulated battery module 1 and the simulated temperature of the simulated battery module 1 collected by the battery management system 3 (i.e., reads the battery system status information from the battery management system 3);

[0114] Step S08: According to user requirements, the host computer 11 establishes a fault model and generates a fault code group;

[0115] Step S09 : The host computer sends a fault setting code to the fault setting unit 15 .

[0116] The present invention provides a battery system teaching platform based on simulated batteries, which can complete the battery system principle teaching, battery system fault analysis and processing teaching, battery system operation and maintenance teaching tasks, and the teaching process is safe, comprehensive, economical and reliable.

[0117] The above embodiments are merely examples of the present invention. Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the present invention should not be limited to the contents disclosed in the embodiments and drawings.

[0118] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A battery system teaching platform based on simulated batteries, It is characterized in that include: A plurality of simulated battery modules (1), a battery management system (3), a total positive relay (4), a total negative relay (8), a pre-charge relay (5), a pre-charge resistor (6), a shunt (9), a battery current simulation unit (13), a temperature simulation unit (14), a battery total voltage simulation unit (16), a fault setting unit (15), a maintenance switch (2), a measurement panel (12), a power supply unit (10), an output terminal (7), a test bench (19) and a host computer (11); The plurality of simulated battery modules (1), the battery management system (3), the total positive relay (4), the total negative relay (8), the pre-charging relay (5), the pre-charging resistor (6), the shunt (9), the battery current simulation unit (13), the temperature simulation unit (14), the battery total voltage simulation unit (16), the fault setting unit (15), the maintenance switch (2), the measurement panel (12), the power supply unit (10), the output terminal (7) and the host computer (11) are all fixed on the stand (19); The simulated battery module (1) is connected to one end of the shunt (9), the other end of the shunt (9) is connected to one end of the total negative relay (8), the other end of the total negative relay (8) is connected to one end of the output terminal (7), the other end of the output terminal (7) is connected to one end of the pre-charging resistor (6) and one end of the total positive relay (4), the other end of the pre-charging resistor (6) is connected to one end of the pre-charging relay (5), the other end of the pre-charging relay (5) is connected to the other end of the total positive relay (4), and the other end of the total positive relay (4) is connected to the other end of the simulated battery module (1); The simulated battery module (1), the shunt (9), the total negative relay (8), the output terminal (7), the pre-charging resistor (6), the total positive relay (4), the pre-charging relay (5) and their connection constitute a main circuit; The plurality of simulated battery modules (1) are connected to a host computer (11); the host computer (11) is connected to a battery management system (3); and the plurality of simulated battery modules (1) are connected to a battery management system (3); The host computer (11) is connected to a battery current simulation unit (13); the host computer (11) is connected to a temperature simulation unit (14); the host computer (11) is connected to a fault setting unit (15); the host computer (11) is connected to a battery total voltage simulation unit (16); The battery management system (3) is connected to the battery current simulation unit (13) and the temperature simulation unit (14); The battery management system (3) is connected to the total positive relay (4), the total negative relay (8), the pre-charging relay (5), the pre-charging resistor (6), and the shunt (9); The plurality of simulated battery modules (1) are connected to a maintenance switch (2); The measuring panel (12) is connected to a plurality of simulated battery modules (1), a total positive relay (4), a total negative relay (8), a pre-charging relay (5), and a battery management system (3); The power supply unit (10) is connected to a plurality of simulated battery modules (1), a battery management system (3), a battery current simulation unit (13), a temperature simulation unit (14), a battery total voltage simulation unit (16), and a fault setting unit (15); The simulated battery module (1) comprises: a plurality of simulated batteries; The host computer (11) is used for: ① sending a simulated battery cell target voltage instruction to the simulated battery module (1) to simulate various voltage parameters of the battery system, and obtaining actual parameter data of the simulated battery cell from the simulated battery module (1); ② Obtaining the simulated battery cell voltage of the simulated battery module (1), the total voltage of the simulated battery module (1) and the temperature parameters of the simulated battery module (1) collected by the battery management system (3), and sending control instructions to each relay through the battery management system (3) to realize the control function of each relay; ③ sending a simulation current setting instruction to the battery current simulation unit (13); ④ sending a simulation temperature setting instruction to the temperature simulation unit (14); 5. Sending a fault setting instruction and a fault recovery instruction to the fault setting unit (15); ⑥ Sending a simulated battery total voltage setting instruction to the battery total voltage simulation unit (16); ⑦ According to user needs, the measured data of the physical battery under various working conditions is used to establish a mathematical model of the simulated battery cell, and a data array is generated and transmitted to the simulated battery module (1) to simulate the characteristic parameters of the physical battery under various working conditions; The battery management system (3) is used for: ① collecting and monitoring the simulated battery cell voltage of the simulated battery module (1), the total voltage of the simulated battery module (1), the temperature of the simulated battery module (1) and the state of charge parameters of the simulated battery module (1); ② Provide communication, safety, cell balancing and management control for the analog battery module (1); ③ Communicate with the host computer (11); ④ Collecting the current signal in the main circuit through the shunt (9) and simulating the current signal in the main circuit; The simulated battery module (1) is used for: ① receiving a simulated battery cell target voltage instruction and a simulated battery cell target voltage calibration instruction sent by a host computer (11); ② Sending the current status data of all simulated battery cells to the upper computer (11); ③Simulate the output voltage of the physical battery module; The output terminal (7) is used to: connect an external load, a capacitor or measure the total voltage; The main positive relay (4) is used to control the connection state between the positive terminal of the simulated battery module (1) and the output terminal (7); The total negative relay (8) is used to control the connection state between the negative terminal of the simulated battery module (1) and the output terminal (7); The pre-charging resistor (6) is used to slowly charge the capacitor at the output terminal (7); The pre-charging relay (5) is used to: control the connection state of the pre-charging resistor (6) in the main circuit; The shunt (9) is used to collect the current signal in the main circuit and transmit it to the battery management system (3); The battery current simulation unit (13) is used to: transmit a simulated current acquisition signal to the battery management system (3) to simulate the working current of the battery system under various working conditions; The temperature simulation unit (14) is used to: transmit a simulated temperature signal to the battery management system (3) to simulate the temperature data of the battery system under various working conditions; The battery total voltage simulation unit (16) is used to: simulate the high voltage output by the battery system; The fault setting unit (15) is used to: set all hardware faults that occur in the actual operation of the battery system; The hardware faults include: line fault, insulation fault, relay fault and high voltage interlock fault; The maintenance switch (2) is used to: disconnect the connection of the main circuit; A plurality of measuring terminals are provided on the measuring panel (12); The measuring panel (12) is used to: lead out the single cell voltage signal of the simulated battery of the simulated battery module (1) and the control voltage signal of each relay to separate measuring terminals, so as to facilitate measurement operation and debugging; The power supply unit (10) is used to provide power to the simulated battery module (1), the battery management system (3), the battery current simulation unit (13), the temperature simulation unit (14), the battery total voltage simulation unit (16) and the fault setting unit (15); The simulated battery module (1) is connected to one end of the shunt (9) via a high-voltage wiring harness (17); the other end of the shunt (9) is connected to one end of the total negative relay (8) via a high-voltage wiring harness (17); the other end of the total negative relay (8) is connected to one end of the output terminal (7) via a high-voltage wiring harness (17); the other end of the output terminal (7) is connected to one end of the pre-charging resistor (6) and one end of the total positive relay (4) via a high-voltage wiring harness (17); the other end of the pre-charging resistor (6) is connected to one end of the pre-charging relay (5) via a high-voltage wiring harness (17); the other end of the pre-charging relay (5) is connected to the other end of the total positive relay (4) via a high-voltage wiring harness (17); the other end of the total positive relay (4) is connected to the other end of the simulated battery module (1) via a high-voltage wiring harness (17); The plurality of simulated battery modules (1) are connected to a host computer (11) via a CAN bus; the host computer (11) is connected to a battery management system (3) via a CAN bus; the host computer (11) is connected to a battery current simulation unit (13) via a CAN bus; the host computer (11) is connected to a temperature simulation unit (14) via a CAN bus; the host computer (11) is connected to a fault setting unit (15) via a CAN bus or a 485 bus; the host computer (11) is connected to a battery total voltage simulation unit (16) via a CAN bus; The plurality of simulated battery modules (1) are each provided with a collection interface, and the battery management system (3) is connected to the collection interfaces on the plurality of simulated battery modules (1) via a collection harness (18); The battery management system (3) is connected to the main positive relay (4), the main negative relay (8), the pre-charging relay (5), the pre-charging resistor (6), and the shunt (9) via a collection harness (18); The plurality of simulated battery modules (1) are connected to the maintenance switch (2) via a high-voltage wiring harness (17); The simulated battery module (1) is composed of a plurality of simulated batteries connected in series, and the simulated battery module (1) is packaged into the appearance of a physical battery module.

2. The battery system teaching platform based on simulated battery as claimed in claim 1, Features: The simulated battery comprises: a controllable voltage source, a controller and a battery housing; The controllable voltage source and the controller are both installed in the battery housing; The controllable voltage source is connected to the controller; The controllable voltage source is used to: simulate output voltage; The controller is used to: control the output voltage of the controllable voltage source and communicate with the host computer (11); The simulated battery is packaged in the appearance of a real battery.

3. The battery system teaching platform based on simulated battery as claimed in claim 1, Features: The battery management system (3) is a product used in electric vehicles, and the battery management system (3) is in a master-slave integrated form or a one-master-multiple-slave form; The total positive relay (4), the total negative relay (8), the pre-charging relay (5), the pre-charging resistor (6) and the shunt (9) are all products used in electric vehicles; The battery total voltage simulation unit (16) is: a high-voltage controllable power supply; The maintenance switch (2) is a product used in electric vehicles.

4. The battery system teaching platform based on simulated battery as claimed in claim 1, Features: The temperature simulation unit (14) is implemented in the first or second manner; The first mode is: the temperature simulation unit (14) is: a temperature sensor; The temperature sensor adopts a resistor array analog temperature sensor; A resistor array having a resistance value corresponding to the temperature is connected to the temperature detection terminal provided on the battery management system (3); The second method is: by simulating the communication protocol of the battery management system (3), the temperature simulation unit (14) sends corresponding temperature data to the battery management system (3), and informs the battery management system (3) of the corresponding temperature value.

5. The battery system teaching platform based on simulated battery as claimed in claim 1, Features: The line faults include: setting an on-off fault between the battery management system (3) and the simulated battery module (1), setting an on-off fault between the battery management system (3) and the total positive relay (4), setting an on-off fault between the battery management system (3) and the pre-charging relay (5), and setting an on-off fault between the battery management system (3) and the total negative relay (8).

6. The battery system teaching platform based on simulated battery as claimed in claim 1, Features: The measuring panel (12) leads the single cell voltage signal of the simulated battery of the simulated battery module (1), the internal total positive signal, the external total positive signal, the control voltage signal of the total positive relay (4), the control voltage signal of the total negative relay (8), the control voltage signal of the pre-charge relay (5) and the high-voltage interlock signal to the measuring terminal of the measuring panel (12), so as to facilitate the measuring operation and debugging; The internal total positive signal is led out from the input end of the total positive relay (4); The external total positive signal is led out from the output end of the total positive relay (4); The high-voltage interlock signal is led out from a response terminal of the battery management system (3).

7. A method for implementing a battery system teaching platform based on a simulated battery according to any one of claims 1 to 6, It is characterized in that The following steps are involved: Step S01, according to user requirements, a mathematical model of a simulated battery cell is established in a host computer (11) based on data actually measured under various working conditions of a physical battery, and a data array is generated; Step S02: The user sets the operating characteristic parameters and fault status of the battery on the monitoring interface of the host computer (11); Step S03, the host computer (11) sends a simulated battery cell target voltage instruction to the simulated battery module (1); Step S04: According to user requirements, the host computer (11) sends a simulation current setting instruction to the battery current simulation unit (13); Step S05: According to user requirements, the host computer (11) sends a simulation temperature setting instruction to the temperature simulation unit (14); Step S06: According to user requirements, the host computer (11) sends a simulated battery total voltage setting instruction to the battery total voltage simulation unit (16); Step S07, the host computer (11) obtains the simulated battery cell voltage of the simulated battery module (1), the total voltage of the simulated battery module (1) and the temperature parameters of the simulated battery module (1) collected by the battery management system (3); Step S08: According to user requirements, the host computer (11) establishes a fault model and generates a fault code group; Step S09: The host computer sends a fault setting code to the fault setting unit (15).

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