CN201069467Y - Testing platform for battery manager - Google Patents

Abstract

A battery manager test platform includes an MCU control unit, an IO digital signal input detection unit, a CAN network data input analysis unit, a CAN network command input analysis unit, an analog signal output unit and a CAN network information output unit. IO digital signal input detection unit, CAN network data input analysis unit and CAN network command input analysis unit accept various detection data and command data, and output to MCU control unit; analog signal output unit and CAN network information output unit are controlled by MCU control unit Control outputs various analog signals to the battery manager. It is suitable for the performance test and evaluation of the battery manager. The analog signal output unit controlled by the MCU control unit is used to output the analog signal. The signal simulation degree is good, the measurement accuracy is high, the accuracy is high, the operation is convenient, the operation error is reduced, and It can detect and analyze the input and output signals in time, and judge and evaluate the function of the battery manager conveniently and accurately.

Description

Battery Manager Test Platform

technical field

The utility model relates to testing equipment, in particular to a battery manager testing platform.

Background technique

The battery manager is an important part of the electric vehicle, which is used for real-time monitoring and monitoring of the battery charge and discharge, temperature, voltage, leakage, water immersion, collision, etc. of the electric vehicle. In order to ensure that the functions of the battery manager are complete and normal during production and use, the battery manager must be tested, and the battery manager test platform is a test system for testing the function of the battery manager. Through the control operation of the system, the functional integrity and operational reliability of the battery manager are evaluated, and the safety defects in the control management of the battery management system are found.

Existing battery manager test platforms generally include a number of knobs, ammeter heads, transformers, and piezoresistive capacitors. The voltage output is generated by adding a fixed voltage to both ends of the variable resistor and adjusting the size of the resistor. To realize the change of output voltage, this method will cause the voltage output to change due to the characteristics of the resistance itself after working for a period of time, and is easily affected by factors such as external temperature. And the use of the entire platform is to manually adjust the temperature, voltage, current and other state analog quantities input to the battery manager, and judge whether the measured battery manager is working normally through the naked eye and feeling. There are defects such as unstable output analog quantity, complex operation, low measurement accuracy, and the inability to quantitatively judge the working stability of the battery manager under test.

Contents of the invention

The technical problem to be solved by the utility model is to remedy the above-mentioned defects and propose a battery manager test platform.

The technical problems of the utility model are solved by the following technical solutions.

The battery manager test platform includes a control unit and an analog signal output unit, the output end of the control unit is connected to the input end of the analog signal output unit, and the output end of the analog signal output unit is connected to the input end of the battery manager.

The features of this battery manager test platform are:

It also includes a data detection input unit, an instruction data input unit and a state information output unit; the input end of the data detection input unit is connected to the output end of the battery manager, and the output end is connected to the input end of the control unit; the instruction data input unit The input end is connected to the output end of the external control machine, and the output end is connected to the input end of the control unit; the input end of the state information output unit is connected to the output end of the control unit, and the output end is connected to the input end of the battery manager and the input of the external control machine. end connection.

The control unit is an MCU control unit.

The data detection input unit includes an IO digital signal input detection unit and a controller area network (Controller Area Network, referred to as CAN) data input analysis unit, its input terminals are respectively connected to the output terminals of the battery manager, and its output terminals are respectively connected to the control unit input connection.

Described analog signal output unit comprises voltage signal output control unit, current signal output control unit, temperature signal output control unit and IO digital signal output control unit, and its input end is connected with the output end of MCU control unit respectively, and its output end is connected with respectively Input connection for the battery manager.

The instruction data input unit refers to the CAN network instruction input analysis unit, and the state information output unit refers to the CAN network information output unit.

The beneficial effect of the utility model compared with the prior art is:

Using an analog signal output unit and centralized control of the MCU control unit to output analog signals, the signal simulation is good and the measurement accuracy is high; through simple command input operations, the simulation control process is completed by the test platform, the measurement accuracy is high, the operation is convenient, and the operation error is reduced. reduce.

Using the MCU control unit, it can detect and analyze various input signals in time, which improves the control accuracy, and reflects the test results in time through the external output device, so as to judge and evaluate the function of the battery manager conveniently and accurately.

The analog signal output is controlled by an independently controlled digital-to-analog conversion chip, and the output analog value is stable, and the deviation with time and temperature changes is small.

Description of drawings

Accompanying drawing is the composition block diagram of the specific embodiment of the utility model.

Detailed ways

The battery manager test platform for electric vehicles as shown in the attached figure includes the following units:

MCU control unit 1: used to coordinate the operation of the following other units, control the semaphore output by each output unit according to the instructions of the CAN network instruction input analysis unit 4, and analyze the IO digital signal input detection unit 2 and the CAN network data input analysis unit 3 and process various input data, output various required CAN network information through each output unit, output required voltage, current and temperature signals, and output required IO digital signals;

IO digital signal input detection unit 2: its output end is connected to the MCU control unit 1, and its input end is connected to the battery manager 11 for collecting the output IO digital signal of the battery manager 11 and passing it to the MCU control unit 1 for MCU control Unit 1 analyzes the current state of the IO digital signal of the battery manager 11;

CAN network data input analysis unit 3: its output end is connected with MCU control unit 1, and input end is connected with battery manager 11, is used for analyzing the data information that battery manager 11 outputs to electric vehicle body CAN network, comprises data information and State information, the analysis result is transmitted to the MCU control unit 1, for the MCU control unit 1 to analyze the current operating state of the battery manager 11 and the working state of the battery collected by the current battery manager 11;

CAN network command input analysis unit 4: its output end is connected with the MCU control unit 1, and the input end is connected with an external control machine, such as a PC 10, for transmitting the control command of the external control machine to the MCU control unit 1;

Voltage signal output control unit 5: its input end is connected to the MCU control unit 1, and its output end is connected to the battery manager 11. The MCU control unit 1 generates a corresponding digital control signal according to the instruction of the input unit and outputs it to the voltage signal output control unit 5. The voltage signal output control unit 5 outputs a corresponding voltage analog signal to the battery manager 11 according to the input digital signal, for generating a voltage analog signal;

Current signal output control unit 6: its input end is connected to the MCU control unit 1, and its output end is connected to the battery manager 11. The MCU control unit 1 generates a corresponding digital control signal according to the instruction of the input unit and outputs it to the current signal output control unit 6. The current signal output control unit 6 outputs a corresponding voltage analog signal to the current sampling module of the battery manager 11 according to the input digital signal, and is converted into a corresponding current signal in the current sampling module of the battery manager 11 for simulating the signal generated by the current sensor. The current signal sampled by the sensor;

Temperature signal output control unit 7: its input terminal is connected to the MCU control unit 1, and its output terminal is connected to the battery manager 11. The MCU control unit 1 generates a corresponding digital control signal according to the instruction of the input unit and outputs it to the temperature output control unit. The temperature signal The output control unit 7 outputs a corresponding voltage analog signal according to the input digital signal, which is used to simulate the voltage analog signal at both ends of the thermistor in actual sampling, and is output to the temperature sampling module of the battery manager 11 for generating the temperature signal. Analog quantity;

IO digital signal output control unit 8: its input end is connected to the MCU control unit 1, and its output end is connected to the battery manager 11. The MCU control unit 1 generates corresponding control signals according to the instructions of the input unit and outputs them to the IO digital signal output control unit 8 , the IO digital signal output control unit 8 converts the IO control command of the MCU control unit 1 into an IO signal that can be recognized by the battery manager 11 and outputs it to the battery manager 11, which is used to simulate the input of sensors other than the battery manager to the battery manager digital IO signal;

CAN network information output unit 9: its input end is connected with MCU control unit 1, and output end is connected with battery manager 11 and external control machine, and this unit has the function of two aspects, one, MCU control unit 1 according to input unit The instruction generates corresponding CAN network information data, the CAN network information output unit accepts the data, and outputs it to the battery manager 11, which is used to simulate the CAN network information of the vehicle body CAN network connected to the battery manager 11 and input to the battery manager 11 Data, secondly, the CAN network information output unit 9 sends the output control execution result of the MCU control unit 1 and the running status information of the current comprehensive test platform to an external control machine, such as a PC 10 .

The following is a specific leakage test project to illustrate the above-mentioned battery manager test platform workflow. The workflow of the leakage test project has the following steps in sequence:

1. Initialize the battery manager test platform. Adjust the simulated battery pack voltage to the standard value. The standard value depends on the technical conditions, and different battery packs correspond to different voltages. When the voltage is under the standard value, the voltage detection module of the battery manager 11 under test shows that the voltage is normal. Similarly, other output parameters of the battery manager test platform, such as temperature, humidity and the output value of each sensor unit to the battery manager 11 are also adjusted to standard values at the same time, so that each corresponding detection of the battery manager 11 to be tested The modules all appear to be working fine. After the battery manager 11 under test is powered on, it interacts with the vehicle CAN network simulated by the battery manager test platform. On the one hand, the battery manager 11 under test detects various analog inputs of the battery pack and converts various detected The data is sent to the simulated vehicle CAN network; on the other hand, various data in the simulated vehicle CAN network are accepted, and the data is compared with the data output by the current battery pack. After the detection is normal, the battery manager 11 to be tested outputs a signal that the battery pack is working normally to the simulated vehicle CAN network. After the battery manager test platform receives this signal through the CAN network data input analysis unit 3, it is determined that the test initialization is completed, and the current running status information of the battery manager test platform is sent to the PC 10 through the CAN network information output unit 9.

2. Input a leakage signal command through the PC 10, and transmit it to the MCU control unit 1 through the CAN network command input analysis unit 4, and the MCU control unit 1 controls the IO digital signal output control unit 8 to output the digital signal to the leakage sensor of the battery manager 11 Check the port and start timing.

3. The battery manager 11 detects the leakage signal, and sends a leakage alarm signal through the CAN network. After the battery manager test platform receives the signal through the IO digital signal input detection unit 2, it inputs it to the MCU control unit 1, stops timing, and judges the response If the time is within the allowable range, the test is passed; otherwise, the response is considered to be timed out and the test is not passed. At the same time, the MCU control unit 1 sends the execution result and the running state information of the current battery manager test platform to the PC 10 through the CAN network information output unit 9 .

4. After the leakage current reaches a certain level, the battery manager 11 needs to disconnect the circuit where the battery pack is located, so repeat the above steps 2 to 3, input different leakage signal commands through the PC 10, and continuously increase the leakage level. When testing When the medium leakage signal reaches a certain level, the battery manager 11 sends a signal to disconnect the circuit where the battery pack is located, and the battery manager test platform receives this signal through the IO digital signal input detection unit 2, and judges whether the delay time is overtime. If the test platform receives this signal within the time specified in the technical conditions, the functional test is passed, otherwise the test is not passed.

The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For a person of ordinary skill in the technical field to which the utility model belongs, without departing from the concept of the utility model, some simple deduction or substitutions can also be made, which should be regarded as belonging to the protection scope of the utility model.

Claims (5)

1. battery manager test platform, comprise control module and simulating signal output unit, the output terminal of control module is connected with the input end of simulating signal output unit, and the output terminal of simulating signal output unit is connected with the battery manager input end, it is characterized in that:

Also comprise Data Detection input block, director data input block and status information output unit; The input end of described Data Detection input block is connected with the battery manager output terminal, and output terminal is connected with the control module input end; The input end of described director data input block is connected with extraneous controller output terminal, and output terminal is connected with the control module input end; The input end of described status information output unit is connected with the output terminal of control module, and output terminal is connected with the input end of battery manager input end and extraneous controller.

2. battery manager test platform as claimed in claim 1 is characterized in that:

Described control module is the MCU control module.

3. battery manager test platform as claimed in claim 2 is characterized in that:

Described Data Detection input block comprises IO digital signal input detection unit and CAN network data input analytic unit, described IO digital signal input detection unit is connected with the battery manager output terminal respectively with the input end of CAN network data input analytic unit, and its output terminal is connected with the input end of control module respectively.

4. battery manager test platform as claimed in claim 2 is characterized in that:

Described simulating signal output unit comprises voltage signal output control unit, current signal output control unit, temperature signal output control unit and IO digital signal output control unit, the input end of described each output unit is connected with the output terminal of MCU control module respectively, and output terminal is connected with the input end of battery manager respectively.

5. as any described battery manager test platform of claim 1 to 3, it is characterized in that:

Described director data input block is meant CAN network instruction input analytic unit, and described status information output unit is meant CAN network information output unit.

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