CN112578206A - Performance testing device for battery management system - Google Patents
Performance testing device for battery management system Download PDFInfo
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- CN112578206A CN112578206A CN202011407477.3A CN202011407477A CN112578206A CN 112578206 A CN112578206 A CN 112578206A CN 202011407477 A CN202011407477 A CN 202011407477A CN 112578206 A CN112578206 A CN 112578206A
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- 238000012360 testing method Methods 0.000 title claims abstract description 64
- 238000001514 detection method Methods 0.000 claims abstract description 118
- 238000004088 simulation Methods 0.000 claims abstract description 44
- 238000004891 communication Methods 0.000 claims description 35
- 238000009413 insulation Methods 0.000 claims description 31
- 238000007599 discharging Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 6
- 238000004801 process automation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013100 final test Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
Abstract
The invention belongs to the technical field of battery management systems, and particularly relates to a performance testing device for a battery management system. The testing device comprises a battery simulator, a temperature simulation circuit, a group end voltage simulation circuit, an output current simulation circuit, a wet contact detection circuit, a control module and a power supply module, realizes the detection of the voltage precision, the voltage balance, the temperature precision, the group end voltage precision, the output current precision and the wet contact of a single battery, can measure whether the performance of a battery management system to be tested reaches the standard according to the detection result, has the whole-process automation of the testing process, greatly reduces the testing time, meets the testing requirements of most battery management systems on the market, and has strong universality.
Description
Technical Field
The invention belongs to the technical field of battery management systems, and particularly relates to a performance testing device for a battery management system.
Background
A Battery Management System (BMS) is an important component of a power Battery System of an electric vehicle. The system can collect and preliminarily calculate the real-time state parameters of the power battery to control the on-off of a power supply loop, can also send the collected data to the vehicle control unit and receive the instruction of the vehicle control unit, and can work in coordination with other systems on the vehicle, so that the real-time monitoring and management of the state of the power battery are realized, and safety accidents are prevented.
The existing battery management system detection and monitoring method comprises the following steps: analyzing the running state of the battery management system according to the running parameters stored in the battery management system; when the battery management system fails, the fault condition of the battery management system is analyzed and processed according to the fault code sent by the battery management system. However, in these methods, the battery management system is detected and monitored by the operating state parameters of the battery management system, and hysteresis is provided. How to realize the inspection of the battery management system at the beginning of the use of the battery management system has necessity so as to ensure the safe and reliable operation of the battery management system and improve the stability and reliability of the battery management system.
Disclosure of Invention
The invention provides a performance testing device for a battery management system, which is used for realizing performance testing of the battery management system.
In order to solve the technical problem, the technical scheme of the invention comprises the following steps:
the invention provides a performance testing device of a battery management system, which comprises:
the battery simulator is used for simulating the charging or discharging state of a battery and comprises a plurality of single battery voltage signal output ends, and the single battery voltage signal output ends are used for being connected with each single battery voltage signal detection end of the battery management system to be tested and the output end of an equalizing circuit of the battery management system to be tested;
the temperature simulation circuit comprises a plurality of simulation temperature signal output ends and a plurality of temperature detection circuits, wherein the simulation temperature signal output ends are used for generating temperature detection values of all the single batteries, and the simulation temperature signal output ends are used for being connected with temperature signal detection ends of all the single batteries of the battery management system to be detected;
the group end voltage simulation circuit is used for simulating the end voltage of the battery and comprises a group end voltage signal output end which is used for connecting a group end voltage signal detection end of the battery management system to be detected;
the output current simulation circuit is used for simulating the output current of the battery and comprises an output current signal output end which is used for connecting a battery output current signal detection end of the battery management system to be detected;
the wet contact detection circuit comprises a wet contact voltage signal detection end for connecting a wet contact of the battery management system to be detected so as to detect the wet contact voltage of the battery management system to be detected;
the control module is in control connection with the battery simulator, the temperature simulation circuit, the group terminal voltage simulation circuit, the output current simulation circuit and the wet contact detection circuit, is provided with an interface in communication connection with the battery management system to be tested, and is used for correspondingly controlling the battery simulator, the temperature simulation circuit, the output current simulation circuit and the wet contact detection circuit to work according to test requirements and receiving a result fed back by the battery management system so as to test corresponding functions of the battery management system to be tested;
and the power supply module is used for supplying power to the battery simulator, the temperature simulation circuit, the group end voltage simulation circuit, the output current simulation circuit and the wet contact detection circuit in the testing device.
The beneficial effects of the above technical scheme are: the invention realizes the detection of the voltage precision, the voltage balance, the temperature precision, the group end voltage precision, the output current precision and the wet contact of the single battery through the battery simulator, the temperature simulation circuit, the group end voltage simulation circuit, the output current simulation circuit and the wet contact detection circuit, can measure whether the performance of the battery management system to be detected reaches the standard according to the detection result, has the whole automatic test process, greatly reduces the test time, meets the test requirements of most battery management systems in the market, and has stronger universality.
Furthermore, in order to realize the detection of the communication port of the battery management system to be detected, the testing device further comprises a communication detection circuit, wherein the communication detection circuit comprises a plurality of communication detection ports for connecting the communication port of the battery management system to be detected so as to detect whether the communication port of the battery management system to be detected is normal; the power supply module is also used for supplying power for the communication detection circuit.
Further, in order to detect the DO port of the tested battery management system, the testing device further includes a DI port detection circuit, which includes a DI detection port used for connecting the DO port of the tested battery management system, so as to detect whether the DO port of the tested battery management system is normal in function; the power supply module also supplies power for the DI port detection circuit.
Furthermore, in order to detect the DI port of the tested battery management system, the test device further comprises a DO port detection circuit, which includes a DO detection port used for connecting the DI port of the tested battery management system, so as to detect whether the DI port of the tested battery management system is normal in function; the power supply module is also used for supplying power to the DO port detection circuit.
Furthermore, the testing device further comprises an insulation detection circuit, wherein the insulation detection circuit comprises a total positive insulation output end, a total negative insulation output end and an insulation ground output end which are respectively used for connecting the positive pole of the group terminal voltage signal detection end, the negative pole of the group terminal voltage signal detection end and the insulation detection ground of the tested battery management system.
Furthermore, the testing device also comprises an upper computer which is in communication connection with the control module and is provided with an interface which is in communication connection with the tested battery management system and is used for issuing a testing control instruction and receiving a testing result.
Drawings
Fig. 1 is a structural diagram of a battery management system performance test apparatus of the present invention;
FIG. 2 is a schematic diagram of the connection between the battery simulator and the battery management system to be tested.
Detailed Description
The structure of the performance testing device for the battery management system is shown in fig. 1, and the performance testing device for the battery management system can test the performance of the battery management system so as to measure whether the performance of the battery management system to be tested reaches the standard. The performance detection comprises the following steps: 1) detecting the voltage precision of the single battery; 2) detecting the temperature precision; 3) detecting balance; 4) communication detection; 5) detecting the voltage precision of the group end; 6) detecting the precision of the output current; 7) detecting insulation precision; 8) detecting a wet joint; 9) detecting a DO port; 10) and (4) detecting through a DI port.
As shown in fig. 1, the device for testing the performance of the battery management system comprises a testing tool and an upper computer, wherein a battery simulator, a temperature simulation circuit, a communication detection circuit, a group end voltage simulation circuit, an output current simulation circuit, an insulation detection circuit, a wet contact detection circuit, a DI port detection circuit, a DO port detection circuit, an MCU and a power supply module are integrated on the testing tool.
The upper computer is in communication connection with the MCU, is provided with an interface in communication connection with the tested battery management system, and can not only issue a test command to the MCU or the tested battery management system so that the MCU controls the corresponding circuit to act or controls the tested battery management system to act according to the test command, but also collect a test result so as to judge whether the performance of the tested battery management system is good or not according to the test result; in addition, the upper computer can also output a test report according to the final test result.
The MCU is a core processing unit of the whole test fixture, can control the conduction of all modules (including modules such as a battery simulator, a temperature simulation circuit and the like) on the test fixture so as to execute corresponding test operation, and can also receive data fed back by a battery management system to be tested.
The battery simulator is a multi-channel battery simulator and is used for simulating a battery and charging and discharging states of the battery, and the battery simulator comprises a plurality of single battery voltage signal output ends which are connected with voltage signal detection ends of all single batteries of a battery management system to be tested. The upper computer issues a single battery voltage precision detection command to the MCU, the MCU controls the battery simulator to simulate the serial or parallel connection condition of a plurality of single-chip voltages of the power battery, each channel outputs voltage according to a set value, so as to simulate the charging or discharging state of each single battery of the power battery, at the moment, the battery management system collects the voltage of each channel through a single battery voltage signal output end of the battery management system and feeds the voltage back to the MCU, the MCU compares the set value of the corresponding channel and the corresponding voltage detection condition fed back by the battery management system to calculate the single battery voltage detection precision, and the calculated single battery voltage detection precision is sent to the upper computer for the upper computer to evaluate the single battery voltage precision performance.
The temperature simulation circuit comprises a plurality of thermistor channels with resistance value of R1 and is used for simulating the temperature of each single battery, and comprises a plurality of simulated temperature signal output ends (actually thermistor voltage output ends) which are connected with each single battery temperature signal detection end of the battery management system to be detected. The upper computer sends a temperature precision detection command to the MCU, the MCU controls the temperature simulation circuit to be conducted, each single battery temperature signal detection end measures the resistance value of each thermistor, the resistance value is correspondingly converted into temperature and fed back to the MCU, the MCU compares the feedback result with the temperature corresponding to the thermistor detected by the MCU to calculate the single battery temperature detection precision, and the calculated single battery temperature detection precision is sent to the upper computer for the upper computer to evaluate the temperature precision performance.
And (3) balance detection is also realized through the battery simulators, as shown in fig. 2, the single battery voltage signal output end of each battery simulator is also connected with the output end of the balance circuit of the battery management system to be detected, and is used for detecting the balance function of the balance circuit in the battery management system to be detected. The upper computer issues a charging continuous equalization test command, the battery simulator issues different battery voltage values, the analog voltage value can reach the condition of charging equalization starting, the battery management system to be tested automatically starts equalization and outputs an equalization current value and an equalization channel, and the upper computer software reads the equalization current value and the equalization channel of the battery management system to be tested and judges whether the equalization current value and the equalization channel are qualified or not; the upper computer issues a discharge continuous equalization test command, the battery simulator issues different battery voltage values, the simulation voltage value can reach a discharge equalization starting condition, the battery management system to be tested automatically starts equalization and outputs an equalization current value and an equalization channel, and the upper computer software reads the equalization current value and the equalization channel of the battery management system to be tested and judges whether the equalization current value and the equalization channel are qualified.
The communication detection circuit comprises a plurality of communication detection ports which are in one-to-one connection with the communication ports of the battery management system to be detected so as to detect whether each communication port of the battery management system to be detected is normal. For one communication port, such as a CAN communication port, the upper computer issues a communication port detection command to the MCU and the tested battery management system, the communication detection circuit sends data to the communication port of the tested battery management system through the communication port, the tested battery management system feeds the received data back to the MCU, and the MCU compares the fed back result with the sent data to determine whether the communication port of the tested battery management system is normal or not, so that the upper computer CAN evaluate the performance of the communication port. And testing other communication ports of the battery management system to be tested according to the method.
The group end voltage simulation circuit is used for simulating the end voltage of the power battery, comprises a group end voltage signal output end and is connected with a group end voltage signal detection end of the battery management system to be detected. The group end voltage simulation circuit can output a voltage with a voltage value of U1 through a group end voltage signal output end, a group end voltage signal detection end of the battery management system to be detected detects the voltage signal and feeds back the detection result to the MCU, and the MCU compares the feedback result with the U1 to calculate the group end voltage detection precision and sends the calculated group end voltage detection precision to the upper computer for the upper computer to evaluate the end voltage precision performance.
The output current simulation circuit is used for simulating the output current of the battery, and comprises an output current signal output end which is connected with a battery output current signal detection end of the battery management system to be detected. The output current analog circuit can output a high-precision voltage U2 (current is detected in a voltage detection mode) through an output current signal output end, a battery output current signal detection end of the battery management system to be detected detects the signal, converts a voltage value into a current value, feeds back a converted result to the MCU, the MCU converts the high-precision voltage U2 into current, compares the fed-back result with the converted result to calculate the detection precision of the battery output current, and upwards transmits the calculated detection precision of the battery output current to the upper computer for the upper computer to evaluate the performance of the battery output current precision.
The insulation detection circuit comprises a total positive resistor, a total negative resistor (the resistance values are R2 resistors), a total positive insulation output end, a total negative insulation output end and an insulation ground output end, wherein one end of the total positive resistor is connected with the total positive insulation output end, the other end of the total positive resistor is connected with the insulation ground output end, one end of the total negative resistor is connected with the total negative insulation output end, the other end of the total negative resistor is connected with the insulation ground output end, and the total positive insulation output end, the total negative insulation output end and the insulation ground output end are respectively connected with a group terminal voltage signal detection end positive electrode, a group terminal voltage signal detection end negative electrode and an insulation detection. The battery management system collects the resistance values of the total positive resistance and the total negative resistance and feeds the resistance values back to the MCU, the MCU compares the feedback resistance values with R2 to calculate the total positive insulation detection precision and the total negative insulation detection precision, and the calculated total positive insulation detection precision and the calculated total negative insulation detection precision are sent to the upper computer for the upper computer to evaluate the insulation precision performance.
The wet contact detection circuit comprises a wet contact voltage signal detection end which is connected with a wet contact of the battery management system to be detected so as to detect the wet contact voltage of the battery management system to be detected. The host computer issues wet contact precision detection order and gives MCU and surveyed battery management system, and surveyed battery management system control wet contact is closed, and MCU control wet contact detection circuit switches on, and wet contact detection circuit detects wet contact voltage to confirm whether the wet contact normally works. For example, if the wet contact is connected to a 24V power supply, the voltage detected by the wet contact detection circuit should change from 0V to 24V after the wet contact is closed. And the MCU sends the detection result to the upper computer for the upper computer to carry out the wet joint performance detection.
And the DI port detection circuit comprises a DI detection port and is connected with the DO port of the tested battery management system so as to detect whether the DO port of the tested battery management system is normal in function. The upper computer issues a DO port detection command to the MCU and the tested battery management system, the MCU controls the DI detection circuit to be conducted, data are sent to the DO port of the tested battery management system through the DI detection port on the test tool, the tested battery management system feeds back the received data to the MCU again, the MCU compares the fed back result with the sent data, and therefore whether the DO port of the tested battery management system is normal or not can be determined, the result is uploaded to the MCU, and the upper computer carries out DI performance detection.
And the DO port detection circuit comprises a DO detection port and is connected with the DI port of the tested battery management system so as to detect whether the DI port of the tested battery management system is normal in function. The upper computer issues a DI port detection command to the MCU and the tested battery management system, the MCU controls the DO detection circuit to be conducted, data are sent to the DI port of the tested battery management system through the DO detection port on the test tool, the tested battery management system feeds back the received data to the MCU again, the MCU compares the fed back result with the sent data, and therefore whether the DI port of the tested battery management system is normal or not can be determined, the result is uploaded to the MCU, and the upper computer performs DO performance detection.
The power supply module can supply power to the modules.
On the whole, the invention can simply and quickly test the performance of the battery management system to judge whether the performance of the battery management system to be tested reaches the standard, has automatic test process, greatly reduces the test time, meets the test requirements of most battery management systems on the market, and has stronger universality.
Claims (6)
1. A battery management system performance testing apparatus, comprising:
the battery simulator is used for simulating the charging or discharging state of a battery and comprises a plurality of single battery voltage signal output ends, and the single battery voltage signal output ends are used for being connected with each single battery voltage signal detection end of the battery management system to be tested and the output end of an equalizing circuit of the battery management system to be tested;
the temperature simulation circuit comprises a plurality of simulation temperature signal output ends and a plurality of temperature detection circuits, wherein the simulation temperature signal output ends are used for generating temperature detection values of all the single batteries, and the simulation temperature signal output ends are used for being connected with temperature signal detection ends of all the single batteries of the battery management system to be detected;
the group end voltage simulation circuit is used for simulating the end voltage of the battery and comprises a group end voltage signal output end which is used for connecting a group end voltage signal detection end of the battery management system to be detected;
the output current simulation circuit is used for simulating the output current of the battery and comprises an output current signal output end which is used for connecting a battery output current signal detection end of the battery management system to be detected;
the wet contact detection circuit comprises a wet contact voltage signal detection end for connecting a wet contact of the battery management system to be detected so as to detect the wet contact voltage of the battery management system to be detected;
the control module is in control connection with the battery simulator, the temperature simulation circuit, the group terminal voltage simulation circuit, the output current simulation circuit and the wet contact detection circuit, is provided with an interface in communication connection with the battery management system to be tested, and is used for correspondingly controlling the battery simulator, the temperature simulation circuit, the output current simulation circuit and the wet contact detection circuit to work according to test requirements and receiving a result fed back by the battery management system so as to test corresponding functions of the battery management system to be tested;
and the power supply module is used for supplying power to the battery simulator, the temperature simulation circuit, the group end voltage simulation circuit, the output current simulation circuit and the wet contact detection circuit in the testing device.
2. The battery management system performance testing device of claim 1, further comprising a communication detection circuit, including a plurality of communication detection ports for connecting to the communication port of the battery management system under test, so as to detect whether the communication port of the battery management system under test is normal; the power supply module is also used for supplying power for the communication detection circuit.
3. The battery management system performance testing device of claim 1, further comprising a DI port detection circuit, including a DI detection port for connecting to a DO port of the battery management system under test, so as to detect whether the DO port of the battery management system under test functions normally; the power supply module also supplies power for the DI port detection circuit.
4. The battery management system performance testing device of claim 1, further comprising a DO port detection circuit, including a DO detection port for connecting a DI port of the battery management system under test, so as to detect whether the DI port of the battery management system under test functions normally; the power supply module is also used for supplying power to the DO port detection circuit.
5. The device for testing the performance of a battery management system according to claim 1, further comprising an insulation detection circuit, wherein the insulation detection circuit comprises a total positive insulation output terminal, a total negative insulation output terminal and an insulation ground output terminal, which are respectively used for connecting the positive terminal voltage signal detection terminal, the negative terminal voltage signal detection terminal and the insulation ground terminal of the battery management system to be tested.
6. The device for testing the performance of the battery management system according to any one of claims 1 to 5, wherein the device further comprises an upper computer which is in communication connection with the control module and has an interface for being in communication connection with the battery management system to be tested, and is used for issuing a test control instruction and receiving a test result.
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| CN117110742A (en) * | 2023-08-22 | 2023-11-24 | 南通国轩新能源科技有限公司 | Quality detection method and system for battery management unit |
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