Battery management system testing method, testing system, battery management system and vehicle

Abstract

The embodiment of the present invention discloses a battery management system test method, a test system, a battery management system and a vehicle. The test method of the battery management system runs on a simulation test system, and the test method of the battery management system includes: disconnecting the charging relay simulation switch and the main negative relay simulation switch of the simulation test system; the first simulation power supply of the simulation test system outputs a simulated battery pack voltage; the second simulation power supply of the simulation test system outputs a floating voltage; the simulation test system receives instructions from the battery management system under test, and acts according to the instructions of the battery management system under test, so as to verify the working state of the battery management system under test. The embodiment of the present invention enables the simulation test system to execute the instructions of the battery management system under test, thereby simulating the actual vehicle test environment. Therefore, the automatic test method is used on a low-cost test device with only two high-voltage power supply circuits, so that the simulation test system can be automatically operated, thereby reducing labor costs.

Description

Technical Field

[0001] Embodiments of the present invention relate to battery management system testing technologies, and in particular, to a battery management system testing method, a testing system, a battery management system, and a vehicle. Background Art

[0002] With the increasing prominence of issues such as climate change, environmental pollution, and energy crises, electric vehicles with high efficiency and zero emissions have been developed on a large scale. For electric vehicles, the battery management system is the core part to ensure the safety of the whole vehicle and its functional performance. Therefore, during the verification stage, a hardware-in-the-loop simulation test system (HIL) is often used to fully test the battery management system (BMS).

[0003] For existing hardware-in-the-loop simulation test platforms, a high-voltage power supply circuit is separately set for each analog sampling terminal, and a high-voltage analog power supply is required to provide voltage in each high-voltage power supply circuit. However, high-voltage analog power supplies are expensive, which leads to a relatively high simulation cost. And there is no method for controlling a simulation test platform with only two high-voltage power supply circuits to conduct BMS tests. Summary of the Invention

[0004] The present invention provides a battery management system testing method, a testing system, a battery management system, and a vehicle, which can automatically test the battery management system at low cost, while reducing the cost of testing equipment and labor cost.

[0005] In a first aspect, an embodiment of the present invention provides a testing method for a battery management system, which runs on a simulation test system. The testing method for the battery management system includes:

[0006] Disconnect the charging relay analog switch and the main negative relay analog switch of the simulation test system;

[0007] A first analog power supply of the simulation test system outputs an analog battery pack voltage;

[0008] A second analog power supply of the simulation test system outputs a floating voltage;

[0009] The simulation test system receives instructions from the battery management system under test and performs actions according to the instructions of the battery management system under test to verify the working state of the battery management system under test.

[0010] Optionally, before disconnecting the charging relay analog switch and the main negative relay analog switch of the simulation test system, it further includes:

[0011] Perform relay adhesion detection on the simulation test system. If the relay is not adhered, perform subsequent steps.

[0012] Optionally, it further includes:

[0013] If the relay is stuck, interrupt the subsequent steps and give an alarm.

[0014] Optionally, the value range of the floating voltage is 2V - 5V.

[0015] Optionally, the simulation test system receives instructions from the battery management system under test and performs actions according to the instructions of the battery management system under test, including:

[0016] The battery management system under test issues a main negative relay closing instruction;

[0017] The simulation test system closes the main negative relay analog switch of the simulation test system;

[0018] The battery management system under test collects the voltage at the voltage analog terminal near the battery side of the main negative relay and judges the working state of the main negative relay;

[0019] The battery management system under test issues a pre-charge relay closing instruction;

[0020] The second analog power supply of the simulation test system outputs a first preset voltage;

[0021] The battery management system under test collects the voltage at the voltage analog terminal far from the battery side of the main positive relay and judges the working state of the pre-charge relay;

[0022] The battery management system under test issues a main positive relay closing instruction;

[0023] The output voltage value of the second analog power supply of the simulation test system is adjusted to the output voltage value of the first analog power supply;

[0024] The battery management system under test collects the voltage at the voltage analog terminal far from the battery side of the main positive relay and judges the working state of the main positive relay.

[0025] Optionally, the simulation test system receives instructions from the battery management system under test and performs actions according to the instructions of the battery management system under test, including:

[0026] The battery management system under test issues a main positive relay opening instruction;

[0027] The second analog power supply of the simulation test system outputs the floating voltage;

[0028] The battery management system under test collects the voltage at the voltage analog terminal far from the battery side of the main positive relay and judges the working state of the main positive relay.

[0029] The battery management system under test issues a main negative relay opening instruction;

[0030] The simulation test system disconnects the main negative relay analog switch of the simulation test system;

[0031] The battery management system under test collects the voltage of the voltage analog terminal on the battery side close to the main negative relay, and judges the working state of the main negative relay.

[0032] Optionally, the simulation test system receives an instruction from the battery management system under test, and the actions performed according to the instruction of the battery management system under test include:

[0033] The battery management system under test issues a charging relay closing instruction;

[0034] The first analog power supply of the simulation test system outputs a second preset voltage;

[0035] The simulation test system closes the charging relay analog switch of the simulation test system;

[0036] The battery management system under test collects the voltage of the voltage analog terminal of the charging interface, and judges the working state of the charging relay;

[0037] The battery management system under test issues a charging relay opening instruction;

[0038] The first analog power supply of the simulation test system outputs a third preset voltage;

[0039] The simulation test system disconnects the charging relay analog switch of the simulation test system;

[0040] The battery management system under test collects the voltage of the voltage analog terminal of the charging interface, and judges the working state of the charging relay.

[0041] In a second aspect, an embodiment of the present invention further provides a test system for a battery management system, which can execute any one of the above-mentioned test methods for a battery management system. The test system for the battery management system includes:

[0042] A battery pack voltage analog terminal voltage acquisition channel, configured to collect the voltage of the battery pack voltage analog terminal and transmit it to the battery management system under test;

[0043] A main positive relay voltage acquisition channel far from the battery side voltage analog terminal, configured to collect the voltage of the main positive relay far from the battery side voltage analog terminal and transmit it to the battery management system under test;

[0044] A main negative relay voltage acquisition channel close to the battery side voltage analog terminal, configured to collect the voltage of the main negative relay close to the battery side voltage analog terminal and transmit it to the battery management system under test;

[0045] The voltage acquisition channel for the analog terminal of the fuse voltage in the battery compartment is used to collect the voltage of the analog terminal of the fuse voltage in the battery compartment and transmit it to the battery management system under test;

[0046] The voltage acquisition channel for the analog terminal of the charging interface voltage is used to collect the voltage of the analog terminal of the charging interface voltage and transmit it to the battery management system under test;

[0047] The signal interaction channel is used to transmit signals between the simulation test system and the battery management system under test.

[0048] In a third aspect, an embodiment of the present invention further provides a battery management system, which is tested by any one of the above battery management system testing methods.

[0049] In a fourth aspect, an embodiment of the present invention further provides a vehicle, including the above battery management system.

[0050] The battery management system testing method in the embodiment of the present invention runs on a simulation test system. The battery management system testing method includes: disconnecting the charging relay analog switch and the main negative relay analog switch of the simulation test system; the first analog power supply of the simulation test system outputs an analog battery pack voltage; the second analog power supply of the simulation test system outputs a floating voltage; the simulation test system receives instructions from the battery management system under test and performs actions according to the instructions of the battery management system under test to verify the working state of the battery management system under test. The embodiment of the present invention enables the simulation test system to execute the instructions of the battery management system under test, thereby simulating the actual vehicle test environment. Thus, an automatic testing method is used on a low-cost testing device with only two high-voltage power supply circuits, enabling the simulation test system to operate automatically, thereby reducing labor costs. Description of the Drawings

[0051] Figure 1 It is a partial structural schematic diagram of a simulation test system provided by the prior art;

[0052] Figure 2 It is a flowchart of a battery management system testing method provided by an embodiment of the present invention;

[0053] Figure 3 It is a structural schematic diagram of a battery management system testing system provided by an embodiment of the present invention. Detailed Embodiments

[0054] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention are shown in the drawings, rather than all the structures.

[0055] An embodiment of the present invention provides a test method for a battery management system, which runs on a simulation test system. The simulation test system can be any test system applicable to this test method, and the simulation test system can be a hardware-in-the-loop simulation test system. The following will exemplarily introduce a test system applicable to this test method.

[0056] Figure 1 FIG. is a partial structural schematic diagram of a simulation test system provided by the prior art. See Figure 1 .

[0057] It includes:

[0058] A simulation test module (not shown in the figure), the simulation test module includes a high-voltage simulation sub-module, and the high-voltage simulation sub-module includes a first power supply terminal;

[0059] A first analog power supply 21, the positive pole of the first analog power supply 21 obtains voltage through the first power supply terminal, and the negative pole of the first analog power supply 21 is grounded;

[0060] A first battery pack analog resistor 22, the first end of the first battery pack analog resistor 22 is connected to the positive pole of the first analog power supply 21;

[0061] A second battery pack analog resistor 23, the first end of the second battery pack analog resistor 23 is connected to the second end of the first battery pack analog resistor 22, and the second end of the second battery pack analog resistor 23 is connected to the negative pole of the first analog power supply 21;

[0062] A battery pack voltage analog terminal U1, the battery pack voltage analog terminal U1 is connected to the positive pole of the first analog power supply 21;

[0063] A fuse voltage analog terminal U4 between battery packs, the fuse voltage analog terminal U4 between battery packs is connected to the second end of the first battery pack analog resistor 22.

[0064] Among them, the simulation test module can be any module for simulating a battery management system. For example, it can be a hardware-in-the-loop simulation test system. The hardware-in-the-loop simulation test system can simulate the operating environment of the object under test by building a simulation model of the controlled object, so that the controller judges that it is in a real environment, and conducts a comprehensive and systematic test on the controller under test. The high-voltage simulation sub-module can provide high-voltage electricity externally to supply voltage to the built hardware circuit. Optionally, the high-voltage simulation sub-module can provide a voltage of 500V to 600V. The first power supply terminal of the high-voltage simulation sub-module is used as the positive electrode of the first analog power supply 21, and the ground terminal is used as the negative electrode of the first analog power supply 21 to form the first analog power supply 21. The first battery pack simulation resistor 22 and the second battery pack simulation resistor 23 can respectively simulate two battery packs. After the first battery pack simulation resistor 22, the second battery pack simulation resistor 23 and the first analog power supply 21 are connected in series to form a loop, the battery pack voltage simulation terminal U1 and the fuse voltage simulation terminal U4 between the battery packs are led out, which are respectively used to measure the positive voltage of the battery pack and the fuse voltage between the battery packs. By measuring the positive voltage of the battery pack, the voltage state of the battery pack can be monitored. By measuring the fuse voltage between the battery packs, the safety state of the battery pack can be judged to prevent short circuit. The voltage value between the two battery pack simulation resistors can also be used as the basis for judging whether the fuse is disconnected. The resistance values of the first battery pack simulation resistor 22 and the second battery pack simulation resistor 23 can be determined according to actual needs. When the resistance values of the two battery pack simulation resistors are the same and the fuse between the battery packs is not disconnected, the voltage value of the fuse voltage simulation terminal U4 between the battery packs is always half of the voltage value of the battery pack voltage simulation terminal U1. Optionally, the battery pack voltage simulation terminal U1 and the fuse voltage simulation terminal U4 between the battery packs can be connected to the simulation test module to feedback the voltages of each voltage simulation terminal to the simulation test module, so that the simulation test module can carry out automated tests. The battery management system in the simulation test module judges the current state of the whole vehicle by collecting the voltage values of the voltage simulation terminals.

[0065] Continue to refer to Figure 1 The test system can also include a charging relay analog switch 24 and a charging interface voltage simulation terminal U5. The first end of the charging relay analog switch 24 is connected to the positive electrode of the first analog power supply 21, and the second end of the charging relay analog switch 24 is connected to the charging interface voltage simulation terminal U5.

[0066] Among them, by adding a charging relay analog switch 24 and a charging interface voltage analog terminal U5 on the basis of the loop where the first analog power supply 21 is located, the loop where the charging relay is located can be simulated, and the charging interface voltage analog terminal U5 is reserved as a voltage acquisition point on the side close to the charging interface. The charging state can be judged by the voltage of the charging interface voltage analog terminal U5. The charging relay analog switch 24 can be used to simulate the charging relay, and the on or off operation of the charging relay can be simulated by turning on or off the charging relay analog switch 24. The battery management system in the simulation test module judges the current state of the whole vehicle by collecting the voltage value of the voltage analog terminal, and then controls the relay to complete the corresponding operation. The purpose of testing the battery management system is achieved.

[0067] Continue to refer to Figure 1 The test system may further include a main negative relay voltage analog terminal U3 near the battery side, a main negative relay analog switch 25, a first shunt resistor analog 26, a second shunt resistor analog 27, and a second analog power supply 28. The high-voltage analog sub-module further includes a second power supply terminal; the positive pole of the second analog power supply 28 obtains voltage through the second power supply terminal. The positive pole of the second analog power supply 28 is connected to the first end of the first shunt resistor analog 26, the negative pole of the second analog power supply 28 is connected to the first end of the second shunt resistor analog 27, the second end of the first shunt resistor analog 26 is respectively connected to the main negative relay voltage analog terminal U3 near the battery side, the second end of the second shunt resistor analog 27, and the first end of the main negative relay analog switch 25, and the second end of the main negative relay analog switch 25 is grounded;

[0068] Among them, it further includes a main positive relay voltage analog terminal U2 far from the battery side, and the positive pole of the second analog power supply 28 is connected to the main positive relay voltage analog terminal U2 far from the battery side.

[0069] Among them, the main negative relay can be simulated by the main negative relay analog switch 25, the first shunt resistor in the vehicle-mounted power battery system can be simulated by the first shunt resistor analog 26, and the second shunt resistor in the vehicle-mounted power battery system can be simulated by the second shunt resistor analog 27. The resistance values of the first shunt resistor analog 26 and the second shunt resistor analog 27 can be determined according to actual needs. The voltage of the main positive relay far from the battery-side voltage analog terminal U2 is equivalent to the voltage of the main positive relay and the pre-charge relay far from the battery side, which can be used to judge the states of the main positive relay and the pre-charge relay. The voltage of the main negative relay near the battery-side voltage analog terminal U3 can be used to judge the state of the main negative relay. When the main negative relay analog switch 25 is disconnected, the voltage generated by voltage division can simulate the open floating voltage of the main negative relay. When the main negative relay analog switch 25 is closed, the voltage is pulled to zero, which can simulate the closing of the main negative relay. The battery management system in the simulation test module judges the current state of the whole vehicle by collecting the voltage values of the voltage analog terminals, and then controls the relay to complete corresponding operations, achieving the purpose of testing the battery management system. In this example, only adding the second analog power supply 28 can provide the voltage of the main positive relay far from the battery-side voltage analog terminal U2 and the voltage of the main negative relay near the battery-side voltage analog terminal U3. For most hardware-in-the-loop simulation test systems, only two high-voltage power supply terminals are equipped. By building the circuit in the above way, there is no need to add a high-voltage analog power supply, saving the test cost.

[0070] Figure 2 It is a flowchart of a test method for a battery management system provided by an embodiment of the present invention. Refer to Figure 2 A test method for a battery management system provided by an embodiment of the present invention includes:

[0071] S1: Disconnect the charging relay analog switch and the main negative relay analog switch of the simulation test system.

[0072] Among them, the state of the simulation test system can be initialized before the test, and each analog switch is disconnected.

[0073] S2: The first analog power supply of the simulation test system outputs an analog battery pack voltage.

[0074] Among them, the vehicle battery pack voltage is simulated by simulating the battery pack voltage, and the real vehicle operating environment is simulated as much as possible. The voltage value of the simulated battery pack voltage can be determined according to actual needs. For example, the voltage value of the simulated battery pack voltage can be 500V - 600V.

[0075] S3: The second analog power supply of the simulation test system outputs a floating voltage.

[0076] Among them, the second analog power supply outputs a floating voltage, which is used to simulate the situation when the second analog power supply is in a floating state. The voltage value of the floating voltage can be determined according to actual needs. For example, the voltage value of the floating voltage can be 2V - 5V.

[0077] S4: The simulation test system receives the instructions of the battery management system under test and acts according to the instructions of the battery management system under test to verify the working state of the battery management system under test.

[0078] Among them, the simulation test system can be controlled by the battery management system under test, and according to the instructions of the battery management system under test, perform voltage regulation of each analog power supply, and actions such as opening and closing of each analog switch. By simulating the changes in the real vehicle environment through the actions of the simulation test system, the function of the battery management system under test can be verified in a highly simulated environment. The embodiment of the present invention enables the simulation test system to execute the instructions of the battery management system under test, and then simulates the real vehicle test environment. Thus, an automatic test method can be used on a low-cost test device with only two high-voltage power supply circuits, enabling the simulation test system to operate automatically, and thereby reducing labor costs.

[0079] In some other embodiments, before disconnecting the charging relay analog switch and the main negative relay analog switch of the simulation test system, it further includes:

[0080] Perform relay adhesion detection on the simulation test system. If the relay is not adhered, perform the subsequent steps.

[0081] Among them, in the simulation test system, there are several relays. Such as the charging relay analog switch and the main negative relay analog switch, etc. The contacts of the relay may cause contact adhesion under the condition of passing a large current. A relay with contact adhesion may not be able to disconnect under the instructions of the battery management system under test, resulting in an abnormal test process. Therefore, relay adhesion detection can be performed before the formal test. If the relay is not adhered, then start the battery management system test.

[0082] Furthermore, if the relay is adhered, interrupt the subsequent steps and give an alarm.

[0083] Among them, if the relay adhesion detection detects that the relay is adhered, stop the battery management system test and give an alarm in any form such as sound, light or network message, etc. To inform the fault information and wait for maintenance.

[0084] In some other embodiments, battery pack status detection can also be performed at any time, especially before disconnecting the charging relay analog switch and the main negative relay analog switch of the simulation test system. Judge whether the voltage of the fuse voltage analog terminal between battery packs is half of the voltage of the battery pack voltage analog terminal. If it is, it is considered that the battery pack status is normal. If not, it is considered that the battery pack status is abnormal.

[0085] In some other embodiments, the simulation test system receives instructions from the battery management system under test and performs actions according to the instructions of the battery management system under test, including:

[0086] S411: The battery management system under test issues a main negative relay closing instruction;

[0087] S412: The simulation test system closes the main negative relay analog switch of the simulation test system;

[0088] Among them, the simulation test system can close the main negative relay analog switch of the simulation test system according to the main negative relay closing instruction to simulate the circuit state when the main negative relay is closed.

[0089] S413: The battery management system under test collects the voltage at the voltage analog terminal near the battery side of the main negative relay and judges the working state of the main negative relay;

[0090] Among them, the battery management system under test can determine whether the closing action of the simulated main negative relay is normal according to the voltage at the voltage analog terminal near the battery side of the main negative relay.

[0091] S414: The battery management system under test issues a pre-charge relay closing instruction;

[0092] S415: The second analog power supply of the simulation test system outputs a first preset voltage;

[0093] Among them, the simulation test system can control the second analog power supply to output the first preset voltage according to the pre-charge relay closing instruction to simulate the circuit state when the pre-charge relay is closed.

[0094] S416: The battery management system under test collects the voltage at the voltage analog terminal far from the battery side of the main positive relay and judges the working state of the pre-charge relay;

[0095] Among them, the first preset voltage can be set according to actual needs. The battery management system under test can determine whether the closing action of the simulated pre-charge relay is normal according to the voltage at the voltage analog terminal far from the battery side of the main positive relay.

[0096] S417: The battery management system under test issues a main positive relay closing instruction;

[0097] S418: The output voltage value of the second analog power supply of the simulation test system is adjusted to the output voltage value of the first analog power supply;

[0098] Among them, the simulation test system can control the voltage output by the second analog power supply to be the same as that of the first analog power supply according to the main positive relay closing instruction to simulate the circuit state when the main positive relay is closed.

[0099] S419: The battery management system under test collects the voltage at the voltage analog terminal on the side away from the battery of the main positive relay and determines the working state of the main positive relay.

[0100] Among them, the battery management system under test can determine whether the closing action of the simulated main positive relay is normal according to the voltage at the voltage analog terminal on the side away from the battery of the main positive relay. The simulation test system can cooperate with the battery management system under test to perform a power-on process test to determine whether there is any abnormality in the control of the battery management system under test during the power-on process. If the simulation test system does not detect any abnormal actions, it is determined that the battery management system under test passes the power-on process detection.

[0101] In some other embodiments, the actions performed by the simulation test system according to the instructions of the battery management system under test include:

[0102] S421: The battery management system under test issues a command to disconnect the main positive relay;

[0103] S422: The second analog power supply of the simulation test system outputs a floating voltage;

[0104] S423: The battery management system under test collects the voltage at the voltage analog terminal on the side away from the battery of the main positive relay and determines the working state of the simulated main positive relay.

[0105] Among them, the simulation test system can control the second analog power supply to output a floating voltage according to the command to disconnect the main positive relay to simulate the circuit state when the main positive relay is disconnected. The battery management system under test can determine whether the disconnection action of the main positive relay is normal according to the voltage at the voltage analog terminal on the side away from the battery of the main positive relay.

[0106] S424: The battery management system under test issues a command to disconnect the main negative relay;

[0107] S425: The simulation test system disconnects the main negative relay analog switch of the simulation test system;

[0108] S426: The battery management system under test collects the voltage at the voltage analog terminal on the side close to the battery of the main negative relay and determines the working state of the simulated main negative relay.

[0109] Among them, the simulation test system can control the main negative relay analog switch to open according to the main negative relay disconnection instruction, so as to simulate the circuit state when the main negative relay is disconnected. The battery management system under test can determine whether the disconnection action of the main negative relay is normal according to the voltage of the voltage analog terminal near the battery side of the main negative relay. The simulation test system can cooperate with the battery management system under test to conduct a power-down process test to determine whether there is any abnormality in the control of the battery management system under test during the power-down process. If the simulation test system does not detect any abnormal actions, it is determined that the battery management system under test passes the power-down process detection.

[0110] In some other embodiments, the simulation test system receives the instruction of the battery management system under test, and the actions according to the instruction of the battery management system under test include:

[0111] S431: The battery management system under test issues a charging relay closing instruction;

[0112] S432: The first analog power supply of the simulation test system outputs a second preset voltage;

[0113] S433: The simulation test system closes the charging relay analog switch of the simulation test system;

[0114] S434: The battery management system under test collects the voltage of the voltage analog terminal of the charging interface and judges the working state of the charging relay.

[0115] Among them, the simulation test system can control the first analog power supply to output a second preset voltage and close the charging relay analog switch according to the charging relay closing instruction, so as to simulate the circuit state when the charging relay is closed. The second preset voltage can be set according to actual needs. The battery management system under test can determine whether the closing action of the simulated charging relay is normal according to the voltage of the voltage analog terminal of the charging interface.

[0116] S435: The battery management system under test issues a charging relay disconnection instruction;

[0117] S436: The first analog power supply of the simulation test system outputs a third preset voltage;

[0118] S437: The simulation test system disconnects the charging relay analog switch of the simulation test system;

[0119] S438: The battery management system under test collects the voltage of the voltage analog terminal of the charging interface and judges the working state of the charging relay.

[0120] Among them, the simulation test system can control the first analog power supply to output a third preset voltage according to the charging relay disconnection instruction, and disconnect the charging relay analog switch to simulate the circuit state when the charging relay is disconnected. The third preset voltage can be set according to actual needs. The battery management system under test can determine whether the disconnection action of the simulated charging relay is normal according to the voltage of the charging interface voltage analog terminal. If both the closing action and the disconnection action of the simulated charging relay are normal, it is determined that the battery management system under test passes the charging process detection.

[0121] Figure 3 FIG. is a schematic structural diagram of a test system for a battery management system provided by an embodiment of the present invention. Refer to Figure 3 An embodiment of the present invention further provides a test system for a battery management system, which can execute any one of the above-mentioned test methods for a battery management system. The test system for a battery management system includes:

[0122] A battery pack voltage analog terminal voltage acquisition channel for acquiring the voltage of the battery pack voltage analog terminal and transmitting it to the battery management system under test;

[0123] A main positive relay remote from the battery side voltage analog terminal voltage acquisition channel for acquiring the voltage of the main positive relay remote from the battery side voltage analog terminal and transmitting it to the battery management system under test;

[0124] A main negative relay close to the battery side voltage analog terminal voltage acquisition channel for acquiring the voltage of the main negative relay close to the battery side voltage analog terminal and transmitting it to the battery management system under test;

[0125] A fuse voltage analog terminal voltage acquisition channel between battery packs for acquiring the voltage of the fuse voltage analog terminal between battery packs and transmitting it to the battery management system under test;

[0126] A charging interface voltage analog terminal voltage acquisition channel for acquiring the voltage of the charging interface voltage analog terminal and transmitting it to the battery management system under test;

[0127] A signal interaction channel for transmitting signals between the simulation test system and the battery management system under test.

[0128] Among them, the corresponding endpoint voltage values can be collected through the battery pack voltage analog terminal voltage acquisition channel, the main positive relay remote battery side voltage analog terminal voltage acquisition channel, the main negative relay near battery side voltage analog terminal voltage acquisition channel, the battery pack fuse voltage analog terminal voltage acquisition channel, and the charging interface voltage analog terminal voltage acquisition channel. The state of the simulation test system can be obtained through the endpoint voltage values, thereby forming a feedback for issuing instructions to the battery management system under test. The battery management system under test can be informed of the real-time state of the simulation test system to form a closed-loop control. The signal interaction channel can be used to transmit the control instructions of the battery management system under test, such as control signals for each analog switch and each analog power supply. Through the test system of the battery management system, the voltage values of each endpoint, as well as information such as control instructions and control signals, can be transmitted to the battery management system under test. Thus, the automatic operation of the test system is simply realized, and the labor cost is further reduced.

[0129] An embodiment of the present invention also discloses a battery management system, which is tested by any one of the above battery management system test methods.

[0130] Among them, since the battery management system provided by the embodiment of the present invention is tested by using the battery management system test method provided by any embodiment of the present invention, the battery management system in this embodiment has corresponding technical features and beneficial effects to the battery management system test method.

[0131] An embodiment of the present invention also discloses a vehicle, including the above battery management system.

[0132] Among them, since the vehicle provided by the embodiment of the present invention includes the battery management system provided by any embodiment of the present invention, the vehicle in this embodiment has the same beneficial effects as the battery management system.

[0133] Note that the above is only the preferred embodiment of the present invention and the applied technical principle. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described here. Various obvious changes, re-adjustments, combinations with each other, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments only. Without departing from the concept of the present invention, more other equivalent embodiments can be included, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A method for testing a battery management system, characterized in that: Running on a simulation test system, the test method of the battery management system includes: Disconnecting the charging relay simulation switch and the main negative relay simulation switch of the simulation test system; The first simulation power supply of the simulation test system outputs a simulation battery pack voltage; The second simulation power supply of the simulation test system outputs a floating voltage; The simulation test system receives instructions from the battery management system under test, and performs actions according to the instructions of the battery management system under test, so as to verify the working state of the battery management system under test; The simulation test system receives an instruction from the battery management system under test, and performs actions according to the instruction from the battery management system under test, including: The battery management system under test issues a main positive relay disconnection instruction; The second simulation power supply of the simulation test system outputs the floating voltage; The battery management system under test collects the voltage of the main positive relay away from the battery side voltage simulation terminal, and determines the working state of the main positive relay; The battery management system under test issues a main negative relay disconnection instruction; The simulation test system disconnects the main negative relay simulation switch of the simulation test system; The battery management system under test collects the voltage of the main negative relay close to the battery side voltage simulation terminal and determines the working state of the main negative relay.

2. The battery management system testing method according to claim 1, characterized in that: Before disconnecting the charging relay simulation switch and the main negative relay simulation switch of the simulation test system, the method further includes: Perform relay adhesion detection on the simulation test system, and if the relay is not adhered, proceed to subsequent steps.

3. The battery management system testing method according to claim 2, characterized in that: Also includes: If the relay is stuck, the subsequent steps are interrupted and an alarm is issued.

4. The battery management system testing method according to claim 1, characterized in that: The floating voltage has a value range of 2V-5V.

5. The battery management system testing method according to claim 1, characterized in that: The simulation test system receives an instruction from the battery management system under test, and performs actions according to the instruction from the battery management system under test, further comprising: The battery management system under test issues a main negative relay closing instruction; The simulation test system closes the main negative relay simulation switch of the simulation test system; The battery management system under test collects the voltage of the main negative relay close to the battery side voltage simulation terminal and determines the working state of the main negative relay; The battery management system under test issues a pre-charge relay closing instruction; The second analog power supply of the simulation test system outputs a first preset voltage; The battery management system under test collects the voltage of the main positive relay away from the battery side voltage simulation terminal, and determines the working state of the pre-charge relay; The battery management system under test issues a main positive relay closing instruction; The output voltage value of the second analog power supply of the simulation test system is adjusted to the output voltage value of the first analog power supply; The battery management system under test collects the voltage of the main positive relay away from the battery side voltage simulation terminal, and determines the working state of the main positive relay.

6. The battery management system testing method according to claim 1, characterized in that: The simulation test system receives an instruction from the battery management system under test, and performs actions according to the instruction from the battery management system under test, further comprising: The battery management system under test issues a charging relay closing instruction; The first analog power supply of the simulation test system outputs a second preset voltage; The simulation test system closes the charging relay simulation switch of the simulation test system; The battery management system under test collects the voltage of the charging interface voltage simulation terminal and determines the working state of the charging relay; The battery management system under test issues a charging relay disconnection instruction; The first analog power supply of the simulation test system outputs a third preset voltage; The simulation test system disconnects the charging relay simulation switch of the simulation test system; The battery management system under test collects the voltage of the charging interface voltage simulation terminal and determines the working state of the charging relay.

7. A battery management system test system, characterized in that: A battery management system testing method capable of executing any one of claims 1 to 6, wherein the battery management system testing system comprises: The voltage acquisition channel of the battery pack voltage simulation terminal is used to collect the voltage of the battery pack voltage simulation terminal and transmit it to the battery management system under test; A voltage acquisition channel of a voltage simulation terminal of a main positive relay away from a battery side, used for acquiring a voltage of a voltage simulation terminal of a main positive relay away from a battery side, and transmitting the voltage to the battery management system under test; A voltage acquisition channel of a voltage simulation terminal of a main negative relay close to a battery side, used to acquire the voltage of a voltage simulation terminal of a main negative relay close to a battery side, and transmit it to the battery management system under test; A charging interface voltage analog terminal voltage acquisition channel, used to acquire the voltage of the charging interface voltage analog terminal and transmit it to the battery management system under test; The signal interaction channel is used to transmit signals between the simulation test system and the battery management system under test.

8. A battery management system, characterized in that: The test is performed by the battery management system testing method as described in any one of claims 1 to 6.

9. A vehicle, characterized in that: Including the battery management system as described in claim 8.

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