Automatic test system of electric motorcycle battery management system

Abstract

The utility model belongs to the technical field of battery management system testing, and provides an automatic testing system of an electric motorcycle battery management system, which comprises an integrated control module configured to send an instruction to test a battery management system to be tested and obtain a testing result according to data information fed back by the battery management system to be tested; the function test module is configured to execute an instruction of the integrated control module to perform a corresponding function test on the battery management system to be tested; and the communication module is respectively connected with the external equipment, the integrated control module and the battery management system to be tested so as to send a control instruction of the integrated control module or the external equipment to the battery management system to be tested. The system has the advantages that the system can send out a test command through the upper computer to complete all function tests of the electric motorcycle BMS, test results are displayed on the upper computer, and meanwhile test data are stored for follow-up reference or tracing, so that the test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery management system testing, in particular to an automatic testing system for an electric motorcycle battery management system. Background Art

[0002] When a lithium power battery pack is in use, it must be managed by a battery management system (BMS). The BMS mainly monitors parameters such as the voltage, temperature, charge and discharge current of the lithium battery, and realizes functions such as balancing, control, and data transmission. It can be said that the BMS is the "brain" for the lithium battery to communicate externally, and its reliability ensures the normal operation of the standby lithium battery pack. Previously, for the testing of the BMS of electric motorcycles, it was necessary to manually plug and unplug the wiring harness, manually set each voltage test point separately, and manually operate each switch. The operator has a lot of operation content, a long time, and low efficiency.

[0003] Moreover, most of the BMSs of electric motorcycles do not have a unified standard interface. When designing a testing system, it is necessary to make different testing systems according to different requirements. This not only leads to a long cycle from design to production, but also raises the cost. After the product is upgraded later, if there are changes in requirements, the testing system needs to re-invest in the design cycle and cost. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an automatic testing system for an electric motorcycle battery management system to solve the problem of automatic testing of the BMS of electric motorcycles.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] An automatic testing system for an electric motorcycle battery management system, which is electrically connected to an external device and a battery management system to be tested respectively, includes:

[0007] An integrated control module, which is configured to send instructions to perform tests on the battery management system to be tested, and obtain test results according to the data information fed back by the battery management system to be tested;

[0008] A function testing module, which is configured to execute the instructions of the integrated control module to perform corresponding function tests on the battery management system to be tested;

[0009] A communication module, which is connected to the external device, the integrated control module and the battery management system to be tested respectively, so as to send the control instructions of the integrated control module or the external device to the battery management system to be tested.

[0010] Further, the function testing module is configured with a high-voltage output module, which includes a plurality of output channels and is configured to output high-voltage electricity to perform high-voltage tests on the battery management system to be tested.

[0011] Further, the high-voltage output module includes a high-voltage common terminal and multiple high-voltage output terminals. Both the high-voltage common terminal and the high-voltage output terminals are disposed on the relay K2. The relay K2 is connected to the integrated control module through the MOS transistor Q20. When the integrated control module sends an instruction to turn on the MOS transistor Q20, the relay K2 is powered on to open the channel between the high-voltage common terminal and the high-voltage output terminals, so as to output high voltage to the battery management system under test.

[0012] Further, the function test module is configured with a low-voltage output module, which includes multiple output channels and is configured to output low voltage to perform a low-voltage test on the battery management system under test.

[0013] Further, the low-voltage output module includes a low-voltage common terminal and multiple low-voltage output terminals. Both the low-voltage common terminal and the low-voltage output terminals are disposed on the relay K4. The relay K4 is connected to the integrated control module through the MOS transistor Q3. When the integrated control module sends an instruction to turn on the MOS transistor Q3, the relay K4 is powered on to open the channel between the low-voltage common terminal and the low-voltage output terminals, so as to output low voltage to the battery management system under test.

[0014] Further, the function test module is configured with an insulation test module, which includes:

[0015] A series resistor group, the two ends of which are respectively connected to the positive and negative electrodes of the battery pack and the housing;

[0016] A switch group, which includes a manual switch and a relay switch. The two ends of the relay switch are respectively connected to the series resistor group and the integrated control module;

[0017] The resistance value between the positive and negative electrodes of the battery pack and the housing is determined by the action of the switch group.

[0018] Further, the function test module is configured with a temperature test module, which includes multiple output channels. Each output channel is composed of one or more resistors in parallel combination to output different resistance values for temperature testing of the battery management system under test.

[0019] Further, the function test module is configured with an analog-to-digital signal detection module, which includes a resistor R35 and a resistor R36 connected in series to the positive electrode of the battery pack. The connection point between the resistor R35 and the resistor R36 is connected to the integrated control module to obtain the positive electrode voltage of the battery pack.

[0020] Further, the function test module is configured with a high and low level detection module, which includes a resistor R39 and a resistor R40 connected to the battery management system under test. The connection point between the resistor R39 and the resistor R40 is connected to the gate of the MOS transistor Q6, and the drain of the MOS transistor Q6 is connected to the integrated control module.

[0021] Further, the communication module includes:

[0022] A CAN communication circuit, which is configured to establish a communication channel between an integrated control module and a battery management system to be tested;

[0023] A CAN communication switching circuit, one end of which is connected to the integrated control module through the CAN communication circuit, and the other end is configured with a plurality of conversion ports for connecting different external devices to form a communication connection between the integrated control module and different external devices.

[0024] Compared with the prior art, the present utility model at least includes the following beneficial effects:

[0025] (1) By designing a test system, all the resources required for BMS testing are integrated under the integrated control of the MCU. All test actions are integrated into test steps, and at the same time, test data and results are recorded. Those with data meeting the requirements are judged as qualified;

[0026] (2) The system can issue test commands through the upper computer, complete all function tests of the electric motorcycle BMS after a series of set steps, display the test results on the upper computer, and save the test data for subsequent reference or traceability, thus solving the disadvantages of low efficiency, misoperation, misjudgment, etc. of manual operation testing, improving production efficiency, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 It is a schematic framework diagram of the automated test system in the embodiments provided by the present utility model;

[0029] Figure 2 It is a circuit diagram of the high-voltage output module in the embodiments provided by the present utility model;

[0030] Figure 3 It is a circuit diagram of the low-voltage output module in the embodiments provided by the present utility model;

[0031] Figure 4 It is a schematic framework diagram of the insulation test module in the embodiments provided by the present utility model;

[0032] Figure 5 It is a schematic framework diagram of the temperature test module in the embodiments provided by the present utility model;

[0033] Figure 6It is the circuit diagram of the AD detection module in the embodiments provided by the present utility model;

[0034] Figure 7 It is the circuit diagram of the high and low level detection module in the embodiments provided by the present utility model;

[0035] Figure 8 It is the schematic framework diagram of the communication module in the embodiments provided by the present utility model. Detailed implementation manners

[0036] It should be noted that in the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] In addition, the technical solutions between various embodiments of the present utility model can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0038] The following are specific embodiments of the present utility model, and the technical solutions of the present utility model will be further described in conjunction with the accompanying drawings, but the present utility model is not limited to these embodiments.

[0039] In this embodiment, as Figure 1 shown, an automated test system for an electric motorcycle battery management system is provided, which is electrically connected to external devices such as a host computer and the battery management system to be tested respectively, and includes:

[0040] An integrated control module, which is configured to send instructions to perform tests on the battery management system to be tested and obtain test results according to the data information fed back by the battery management system to be tested;

[0041] A function test module, which is configured to execute the instructions of the integrated control module to perform corresponding function tests on the battery management system to be tested;

[0042] A communication module, which is connected to external devices, the integrated control module, and the battery management system to be tested respectively to send control instructions of the integrated control module or external devices to the battery management system to be tested.

[0043] This system can issue test commands through external devices such as the host computer. After a series of set working steps, all function tests of the BMS are completed, and the test results are displayed on the external device. At the same time, the test data is saved for subsequent reference or traceability, thus improving the test efficiency.

[0044] In the function test module, a high-voltage output module, a low-level output module, an insulation test module, a temperature detection module, an analog-digital signal detection module, and a high-low level detection module are provided. All modules are controlled by the integrated control module, and different types of electric motorcycle BMS can select resources for testing according to their own needs.

[0045] As Figure 2 shown, in the high-voltage output module, it includes multiple output channels and is configured to output high-voltage electricity to perform the high-voltage test of the battery management system to be tested.

[0046] Specifically, a high-voltage common terminal and multiple high-voltage output terminals are provided. The high-voltage common terminal and the high-voltage output terminals are both arranged on the relay K2, and the relay K2 is connected to the integrated control module through the MOS tube Q20.

[0047] The integrated control module outputs a high level to the high-voltage output control 1 port (HL_CON01), through the resistor R94 to the gate of the MOS tube Q20, and the MOS tube Q20 is turned on, thereby pulling down the drain of the MOS tube Q20. Then, a 5V voltage is formed across the coil of the relay K2, causing the relay K2 to be attracted, and the 4th and 5th feet of the relay are in contact, which connects the high-voltage output 1 port (HV_OUT1) to the high-voltage common terminal (HV_COM). Thus, the action of outputting high voltage to the battery management system to be tested is achieved.

[0048] In addition, the resistor R117 can quickly discharge the gate capacitance after the control terminal changes from high to low. The lighting of the light-emitting diode D7 indicates that the relay is closed, and the extinguishing of D7 represents that the relay is open. The diode D59 eliminates the high voltage generated by the coil after the relay is open, thereby protecting the MOS tube Q20.

[0049] Similarly, as Figure 3 shown, in the low-voltage output module, it includes multiple output channels and is configured to output low-voltage electricity to perform the low-voltage test of the battery management system to be tested.

[0050] A low-voltage common terminal and multiple low-voltage output terminals are provided. The low-voltage common terminal and the low-voltage output terminals are both arranged on the relay K4, and the relay K4 is connected to the integrated control module through the MOS tube Q3.

[0051] The integrated control module outputs a high level to the low-level output control 1 port (LV_CON01), which goes through resistor R62 to the gate of MOS transistor Q3. MOS transistor Q3 is turned on, pulling down the drain of MOS transistor Q3. This creates a 5V voltage across the coil of relay K4, causing relay K4 to close. When the 4th and 5th pins of relay K4 make contact, the low-level output 1 port (LV_OUT01) is connected to the low-level common terminal (LV_COM), thus achieving the action of outputting a low level to the battery management system under test.

[0052] As Figure 4 shown, the insulation test module consists of three parts: a series resistor group from the BMS high voltage (B+, B-) to the enclosure, a manual switch, and a relay switch. The resistance value between the high-voltage positive and negative terminals of the battery pack and the enclosure is determined by the actions of the manual switch and the relay switch.

[0053] Specifically, there are five groups of series resistor groups between the high-voltage positive and negative terminals of the battery pack and the enclosure, and the resistors within each group are connected in parallel. The manual switch S1 has 4 independent switches, which respectively control the groups of series resistor groups between the high-voltage positive terminal of the battery pack and the enclosure. The 1st and 8th pins of manual switch S1 form one switch. When it is closed, the resistor group connected to it is short-circuited, and the same applies to the other switches.

[0054] In the relay switch, relay K11 controls the first and second groups of series resistor groups between the high-voltage positive terminal of the battery pack and the enclosure. When relay K11 receives an instruction from the integrated control module and operates, the two resistor groups are short-circuited simultaneously, and the same applies to the other relays. In this way, relays K11 - K14, under the control of the integrated control module and in combination with manual switches S1 and S3, can form different resistance values between the battery pack and the enclosure for BMS testing.

[0055] As Figure 5 shown, in the temperature detection module, it provides 4 channels of temperature detection, namely TMP01 - TMP04. Each channel is controlled by the combination of TMP_CON1, TMP_CON2, and TMP_CON3 to output different resistance values for BMS testing.

[0056] TMP_CON1 - TMP_CON3 receive instructions from the integrated control module, causing the MOS transistors to conduct or turn off, thereby forming the individual resistance values of resistor R222, resistor R223, and resistor R224 connected to the MOS transistors to be output individually or in parallel.

[0057] As Figure 6 shown, in the analog-to-digital signal detection module, it includes resistor R35 and resistor R36 connected in series to the positive terminal of the battery pack. The connection point between resistor R35 and resistor R36 is connected to the integrated control module to obtain the positive voltage of the battery pack.

[0058] The signal of the positive electrode B+ of the battery pack is divided by resistors R35 and R36 to obtain a smaller voltage value. This voltage is filtered by capacitor C97 and regulated by diode D36, and then output to the analog-to-digital signal conversion port of the integrated control module for detection. Then, through data processing and conversion, the specific value of the positive electrode of the battery pack is obtained, so as to compare with the voltage of the positive electrode of the battery pack collected in the battery management system to be tested, and the accuracy test of the data acquisition of the battery management system to be tested is realized.

[0059] As Figure 7 shown, in the high and low level detection module, it includes resistors R39 and R40 connected to the battery management system to be tested. The connection point of resistors R39 and R40 is connected to the gate of MOS transistor Q6, and the drain of MOS transistor Q6 is connected to the integrated control module.

[0060] The high-level signal of port H_LEVEL01 is divided by resistors R39 and R40 to obtain a turn-on voltage of the MOS transistor. This voltage is filtered by capacitor C37 and regulated by diode D73 to turn on MOS transistor Q6, making the drain of MOS transistor Q6 grounded. After passing through resistor R119, the integrated control module can obtain a low-level signal. On the contrary, if H_LEVEL01 is at a low level, MOS transistor Q6 will be turned off, and the 5V high-level signal will pass through resistor R41 and then through resistor R119 and be sent to the integrated control module.

[0061] As Figure 8 shown, in the communication module, it includes two parts. One is the CAN communication circuit. The integrated control module communicates with chip U17 through resistors R12 and R13. Among them, capacitors C72 and C79 are filter capacitors, and chip U17 communicates with the outside through resistors R238, R239 and common-mode inductor L4. Among them, capacitors C106, C107, and C108 are all filter capacitors, diodes D64 and D65 are all voltage-regulating diodes, and diodes D66 and D67 are all TVS tubes, and the purpose is to filter out interference signals.

[0062] The second part is the CAN communication switching circuit for the integrated control module to communicate with external devices, with a total of 4 channels (excluding the common terminal). Taking the CAN0 terminal as an example, after the CAN0 control terminal becomes high level, the high level is divided by resistors R243 and R234 and then reaches the gate of MOS transistor Q4, thereby turning on MOS transistor Q4, and the drain of MOS transistor Q4 is pulled low. A 5V voltage drop is formed across the coil of relay K8, causing relay K8 to actuate. The fourth and fifth pins of relay K8 are shorted, and the ninth and eighth pins are shorted. In this way, the CAN0 terminal is connected to the CAN common terminal, and the integrated control module can communicate with the device at the CAN0 terminal. And the lighting of light-emitting diode D28 indicates that relay K8 is closed, representing that the device at the CAN0 terminal is in communication. The extinguishing of light-emitting diode D28 represents that relay K8 is open, indicating that the device at the CAN0 terminal is not in communication.

[0063] This system can issue test commands through the host computer. After a series of set working steps, it completes all function tests of the electric motorcycle BMS, displays the test results on the host computer, and saves the test data for subsequent reference or traceability. Thus, it solves the disadvantages of low efficiency, misoperation, and misjudgment in manual operation testing, improves production efficiency, and reduces production costs. The specific embodiments described in this article are only illustrative of the spirit of the present invention. Those skilled in the technical field to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An automated test system for an electric motorcycle battery management system, which is electrically connected to external devices and the battery management system to be tested respectively, and is characterized in that Comprising: An integrated control module, which is configured to send instructions to perform tests on the battery management system to be tested, and obtain test results based on the data information fed back by the battery management system to be tested; A function test module, which is configured to execute the instructions of the integrated control module to perform corresponding function tests on the battery management system to be tested; A communication module, which is respectively connected to an external device, the integrated control module, and the battery management system to be tested, so as to send control instructions of the integrated control module or the external device to the battery management system to be tested.

2. The automated test system for an electric motorcycle battery management system according to claim 1, characterized in that, The function test module is configured with a high-voltage output module, which includes a plurality of output channels and is configured to output high-voltage electricity to perform a high-voltage test on the battery management system to be tested.

3. The automated test system for an electric motorcycle battery management system according to claim 2, characterized in that, The high-voltage output module includes a high-voltage common terminal and a plurality of high-voltage output terminals. The high-voltage common terminal and the high-voltage output terminals are both arranged on a relay K2. The relay K2 is connected to the integrated control module through a MOS transistor Q20. When the integrated control module sends an instruction to turn on the MOS transistor Q20, the relay K2 is energized to open the channel between the high-voltage common terminal and the high-voltage output terminals, so as to output high-voltage electricity to the battery management system to be tested.

4. The automated test system for an electric motorcycle battery management system according to claim 1, characterized in that, The function test module is configured with a low-voltage output module, which includes a plurality of output channels and is configured to output low-voltage electricity to perform a low-voltage test on the battery management system to be tested.

5. The automated test system for an electric motorcycle battery management system according to claim 4, characterized in that, The low-voltage output module includes a low-voltage common terminal and a plurality of low-voltage output terminals. The low-voltage common terminal and the low-voltage output terminals are both arranged on a relay K4. The relay K4 is connected to the integrated control module through a MOS transistor Q3. When the integrated control module sends an instruction to turn on the MOS transistor Q3, the relay K4 is energized to open the channel between the low-voltage common terminal and the low-voltage output terminals, so as to output low-voltage electricity to the battery management system to be tested.

6. The automated test system for an electric motorcycle battery management system according to claim 1, characterized in that, The function test module is configured with an insulation test module, which includes: A series resistor group, the two ends of which are respectively connected to the positive and negative electrodes and the outer shell of the battery pack; A switch group, which includes a manual switch and a relay switch. The two ends of the relay switch are respectively connected to the series resistor group and the integrated control module; The resistance value between the positive and negative electrodes of the battery pack and the outer shell is determined by the action of the switch group.

7. The automated test system for an electric motorcycle battery management system according to claim 1, characterized in that, The function test module is configured with a temperature test module, which includes a plurality of output channels. Each output channel is composed of one or more resistors in parallel combination to output different resistance values to perform a temperature test on the battery management system to be tested.

8. The automated test system for an electric motorcycle battery management system according to claim 1, characterized in that, The function test module is configured with an analog-to-digital signal detection module, which includes a resistor R35 and a resistor R36 connected in series and connected to the positive electrode of the battery pack. The connection point between the resistor R35 and the resistor R36 is connected to the integrated control module to obtain the positive electrode voltage of the battery pack.

9. The automated test system for an electric motorcycle battery management system according to claim 1, characterized in that, The function test module is configured with a high and low level detection module, which includes a resistor R39 and a resistor R40 connected to the battery management system to be tested. The connection point between the resistor R39 and the resistor R40 is connected to the gate of a MOS transistor Q6. The drain of the MOS transistor Q6 is connected to the integrated control module.

10. An automated test system for an electric motorcycle battery management system according to claim 1, characterized in that, The communication module includes: A CAN communication circuit, which is configured to establish a communication channel between the integrated control module and the battery management system under test; A CAN communication switching circuit, one end of which is connected to the integrated control module through the CAN communication circuit, and the other end is configured with a plurality of conversion ports, and the conversion ports are used to connect different external devices to form a communication connection between the integrated control module and different external devices.

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