Manual test bench with remote auxiliary test function for BMS

Abstract

The utility model relates to a BMS hand-operated test bench with a remote auxiliary test function, and belongs to the technical field of power battery management system test. According to the scheme, the testing device comprises a testing interface used for being connected with a corresponding port of a BMS to be tested, the testing interface is connected with a corresponding signal generator through a corresponding manual switch, and the manual switch is correspondingly connected with a remote control switch used for remotely controlling opening and closing in parallel. On the basis of a traditional manual test rack, the remote control switch is connected to the manual test switch in parallel, daily field office of testers is met, continuity of remote office on test tasks is taken into consideration, and the problem that the test tasks need to be interrupted when the traditional manual test rack faces remote office is solved.

Description

Technical Field

[0001] The utility model relates to a manual test bench for a BMS with a remote auxiliary test function, belonging to the technical field of power battery management system testing. Background Art

[0002] The battery management system (BMS) is a core component for monitoring and controlling the power battery of electric vehicles. It is also one of the three major electronic control systems of the vehicle and plays an extremely important role in the vehicle control system. The simulation test of the BMS system before installation is an important part of ensuring its safe and reliable electrical performance. The functions of BMS are complex and there are many corresponding peripheral interfaces, but they mainly involve power supply, gun insertion, temperature sensing and communication. During the test process, test engineers need to simulate different real vehicle scenarios to switch the working status of BMS in order to achieve the comprehensiveness of the test. Therefore, it is necessary to build a test bench that can simulate the real vehicle test environment to achieve this.

[0003] Existing manual test bench solutions are as follows Figure 1 As shown, manual switches K1', K2', and K3' are connected in series between the normal fire power supply, ON fire power supply, and A+ activation signal that require frequent BMS operation and the positive pole of the low-voltage programmable power supply; manual switch K4' and resistor R are connected in series between the gun plug signal and the simulated "ground", where the resistor R has the same resistance as the gun plug. In this way, the tester only needs to control the corresponding manual switch to close or open on the operating table to simulate the operation on the actual vehicle, but problems also arise. When the tester cannot arrive at the site for testing, all the manual switches on the test bench cannot be opened and closed, and the test work has to be suspended.

[0004] The Chinese utility model patent authorization announcement with the authorization announcement number CN217332673U discloses a test system for the BMS function of electric vehicles, in which each interface of the device under test is connected to each signal generator and power supply port through a switch box, and the switching control of each switch in the switch box is used to simulate the operation on the real vehicle. The patent document also discloses a variation, in which the switch on the switch box is replaced by a relay, and the opening and closing of the relay is controlled by the host computer, saving labor costs.

[0005] However, in the two variations of this solution, the non-relay manual switch also has the problem that the test cannot be performed when the tester is not present, resulting in a test suspension; and the solution of replacing the manual switch with a relay makes the test system lose the function of manual operation by on-site personnel to perform tests. Utility Model Content

[0006] The utility model aims to provide a manual test bench for BMS with a remote auxiliary test function, so as to solve the problem that the BMS test bench in the prior art cannot take into account both on-site operation and remote operation.

[0007] To achieve the above purpose, the solution of the utility model includes:

[0008] The utility model provides a technical solution of a manual test bench for a BMS with a remote auxiliary test function, comprising a test interface for connecting to a corresponding port of a BMS to be tested, wherein the test interface is connected to a corresponding signal generator via a corresponding manual switch, and a remote control switch for remote control of separation and connection is connected in parallel to the manual switch.

[0009] Furthermore, it also includes a test host computer connected to the CAN communication interface of the BMS to be tested, and the test host computer controls the connection to the remote control switch.

[0010] Furthermore, it also includes a remote host computer for remotely performing test operations, and the remote host computer is communicatively connected to the test host computer.

[0011] Furthermore, the test interface includes a normal fire test interface for connecting to a normal fire power supply port of the BMS to be tested, the signal generator includes a low-voltage power supply shared with the BMS to be tested, and the normal fire test interface is connected to the positive pole of the low-voltage power supply through a corresponding manual switch.

[0012] Further, the test interface includes an ON fire test interface for connecting to an ON fire power supply port of the BMS to be tested, the signal generator includes a low voltage power supply shared with the BMS to be tested, and the ON fire test interface is connected to the positive pole of the low voltage power supply through a corresponding manual switch.

[0013] Further, the test interface includes an A+ test interface for connecting to an A+ activation port of the BMS to be tested, the signal generator includes a low-voltage power supply shared with the BMS to be tested, and the A+ test interface is connected to the positive pole of the low-voltage power supply through a corresponding manual switch.

[0014] Furthermore, the test interface includes a gun plug test interface for connecting to a gun plug signal port of the BMS to be tested, the signal generator includes a grounding resistor with one end grounded for simulating the gun plug resistance, and the gun plug test interface is connected to a non-grounded end of the grounding resistor through a corresponding manual switch.

[0015] Furthermore, the low-voltage power supply is a low-voltage programmable power supply.

[0016] Furthermore, the remote control switch is a programmable normally open relay.

[0017] Furthermore, the test host computer is connected to the programmable normally open relay via the host USB to serial port.

[0018] The beneficial effects of the utility model are:

[0019] The utility model is an improved invention, which is based on a traditional manual test bench and connects a remote control switch in parallel to the manual test switch, so as to meet the daily on-site office needs of test personnel while also taking into account the continuity of test tasks for remote office, and solves the problem that the traditional manual test bench needs to interrupt the test tasks when facing remote office.

[0020] The solution of the utility model has strong expansibility, and users can expand interfaces according to different controllers and different interface types, which can meet the excitation input of most peripheral interfaces.

[0021] In the utility model, the test host computer is connected to the BMS to be tested via a CAN line. During the remote test, the test host computer controls the closing of the corresponding remote control switch and reads and analyzes the CAN message sent by the BMS at the same time, so as to automatically obtain the test result.

[0022] At the same time, a normally open relay is used as a remote control switch. When remote testing is not required or the remote control is powered off, the remote control switch is automatically disconnected to avoid interfering with on-site manual testing.

[0023] At the same time, a programmable power supply is adopted, which can facilitate remote testing of the switch control of the power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a circuit schematic diagram of a manual test bench in the prior art;

[0025] Figure 2 The utility model is a circuit schematic diagram of a manual test bench with a remote auxiliary test function. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] The idea of ​​this solution is to connect a remote control switch in parallel to the manual switch of a traditional manual test bench, so that the on-site manual switch and the remote control switch can replace each other, and both can independently connect the corresponding port of the BMS to a signal generator such as a low-voltage power supply, so that the on-site manual test function is retained while the manual test bench has the function of remote control testing.

[0028] like Figure 2The utility model shown is a manual test bench with a remote auxiliary test function for a BMS, including a manual test bench body. The manual test bench has an interface for connecting to a BMS to be tested. In this embodiment, the interface includes a normal fire power supply interface, an ON fire power supply interface, an A+ activation port (for auxiliary power supply or wake-up of the BMS) and a gun plug signal interface, which are respectively used to connect to corresponding ports of the BMS to be tested so as to test the relevant port functions of the BMS to be tested. Figure 2 In the figure, the BMS is the BMS to be tested, and each port of the BMS to be tested has been connected to the above-mentioned interfaces on the manual test bench body.

[0029] The interfaces for connecting the BMS to be tested are connected to the corresponding signal generating terminals through the corresponding manual switches, and the signal generating terminals include a low voltage power supply and an analog ground signal. Figure 2 As shown, the normal fire power supply interface, ON fire power supply interface, and A+ activation port are connected to the positive electrode of the S- low-voltage power supply through manual switches K1', K2', and K3' respectively, and the negative electrode of the low-voltage power supply and the BMS to be tested are grounded, which are respectively used to simulate the normal power supply, ON fire power supply and A+ wake-up signal or A+ auxiliary power supply on the actual vehicle; the gun plug signal interface is grounded through K4' and the resistor R used to simulate the gun plug resistance.

[0030] In addition, it also includes a test host computer, which is connected to the CAN communication interface of the BMS to be tested through a CAN line. It is used to detect whether the BMS to be tested will send corresponding messages to the CAN network according to the established design when the manual test bench body simulates the operation on the actual vehicle to the corresponding interface of the BMS to be tested through the interface used to connect the various ports of the BMS to be tested.

[0031] In order to realize the remote auxiliary test function, remote control switches are connected in parallel to the manual switches K1', K2', K3', and K4', and the remote control switches are controlled by the test host computer. Figure 2 As shown, one end of the remote control switches K1, K2, and K3 are respectively connected to the lines between the normal fire power supply interface, the ON fire power supply interface, the A+ activation port and the manual switches K1', K2', and K3', and the other end is connected to the positive electrode of the S- low-voltage power supply; one end of the remote control switch K4 is connected to the line between the gun plug signal interface and the manual switch K4', and the other end is connected to the line between the manual switch K4' and the resistor R.

[0032] Specifically, the remote control switch can use a programmable normally open relay. The power on and off of the relay coil is controlled by the test host computer. The test host computer controls the corresponding relay to be turned on and off according to the test instance, and at the same time detects whether the BMS to be tested responds correctly through the CAN line.

[0033] The S-low voltage power supply can also be further programmed to achieve remote power switch control.

[0034] At the same time, a remote host computer is set up, and the remote host computer is connected to the test host computer for controlling the test host computer and querying the test results through the software on the remote host computer.

[0035] When conducting remote assisted testing, the tester operates the remote host computer to control the test host computer to run the test instance. At the same time, the test host computer sends the test results back to the remote host computer to complete the remote assisted testing.

[0036] During the BMS test process, the utility model connects the programmable normally open relay K1 between the normal-fire power supply pin of the BMS to be tested and the positive pole of the low-voltage programmable power supply through a hard wire, and is in parallel with the manual switch K1', wherein the normal-fire end is connected to the common end of the normally open relay K1, and the positive pole of the low-voltage programmable power supply is connected to the normally open end of the normally open relay K1; connects the programmable normally open relay K2 between the ON-fire power supply pin of the BMS to be tested and the positive pole of the low-voltage programmable power supply through a hard wire, and is in parallel with the manual switch K2', wherein the ON-fire end is connected to the common end of the normally open relay K2, and the positive pole of the low-voltage programmable power supply is connected to the normally open end of the normally open relay K2; connects the programmable normally open relay K3 to the BMS to be tested through a hard wire. Between the A+ activation pin and the positive pole of the low-voltage programmable power supply, there is a parallel relationship with the manual switch K3', wherein the A+ activation end is connected to the common end of the normally open relay K3, and the positive pole of the low-voltage programmable power supply is connected to the normally open end of the normally open relay K3; the programmable normally open relay K4 is also connected in series through a hard wire between the BMS gun plug signal pin to be tested and the resistor R on the BMS side, and is in parallel relationship with the manual switch K4', wherein the gun plug signal is connected to the common end of the normally open relay K4, and the resistor R on the BMS side is connected to the normally open end of the normally open relay K4.

[0037] The test host computer PC1 controls the programmable normally open relays K1, K2, K3 and K4 through the host USB to serial port to realize the opening and closing of the switch.

[0038] When the tester operates the test bench on site, he can set the program-controlled normally open relays K1, K2, K3 and K4 to the normally open end through the host computer, and perform the test by manually operating the manual switches K1', K2', K3' and K4';

[0039] When the tester needs to remotely operate the test bench, the test host computer PC1 is remotely controlled by the remote host computer PC2 through VPN (Virtual Private Network) to indirectly send serial port switch instructions to the normally open relays K1, K2, K3 and K4; at the same time, the manual switches K1', K2', K3' and K4' must remain in the open state.

Claims

1. A manual test bench for BMS with remote auxiliary test function, comprising a test interface for connecting to the corresponding port of the BMS to be tested, wherein the test interface is connected to the corresponding signal generator through a corresponding manual switch, characterized in that: The manual switch is connected in parallel with a remote control switch for remote control of opening and closing.

2. The BMS manual test bench with remote auxiliary test function according to claim 1 is characterized in that: It also includes a test host computer connected to the CAN communication interface of the BMS to be tested, and the test host computer controls the connection to the remote control switch.

3. The BMS manual test bench with remote auxiliary test function according to claim 2 is characterized in that: It also includes a remote host computer for remotely performing test operations, and the remote host computer is communicatively connected with the test host computer.

4. The BMS manual test bench with remote auxiliary test function according to claim 2 is characterized in that: The test interface includes a constant fire test interface for connecting to a constant fire power supply port of the BMS to be tested, the signal generator includes a low voltage power supply sharing a common ground with the BMS to be tested, and the constant fire test interface is connected to the positive pole of the low voltage power supply through a corresponding manual switch.

5. The BMS manual test bench with remote auxiliary test function according to claim 2 is characterized in that: The test interface includes an ON fire test interface for connecting to an ON fire power supply port of the BMS to be tested, the signal generator includes a low voltage power supply shared with the BMS to be tested, and the ON fire test interface is connected to the positive pole of the low voltage power supply through a corresponding manual switch.

6. The BMS manual test bench with remote auxiliary test function according to claim 2 is characterized in that: The test interface includes an A+ test interface for connecting to an A+ activation port of the BMS to be tested, the signal generator includes a low-voltage power supply shared with the BMS to be tested, and the A+ test interface is connected to the positive pole of the low-voltage power supply through a corresponding manual switch.

7. The BMS manual test bench with remote auxiliary test function according to claim 2 is characterized in that: The test interface includes a gun plug test interface for connecting to a gun plug signal port of a BMS to be tested, the signal generator includes a grounding resistor with one end grounded for simulating the gun plug resistance, and the gun plug test interface is connected to a non-grounded end of the grounding resistor through a corresponding manual switch.

8. The manual test bench for BMS with remote auxiliary test function according to claim 4, 5 or 6, characterized in that: The low voltage power supply is a low voltage program-controlled power supply.

9. The BMS manual test bench with remote auxiliary test function according to claim 2 is characterized in that: The remote control switch is a program-controlled normally open relay.

10. The BMS manual test bench with remote auxiliary test function according to claim 9 is characterized in that: The test host computer is connected to the program-controlled normally open relay via the host USB to serial port.

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