CN115079651A - A kind of power battery laboratory fault handling method and device - Google Patents

Abstract

The application provides a power battery laboratory fault processing method and a device, and the power battery laboratory fault processing method comprises the following steps: receiving a fault alarm signal output by a power battery laboratory; determining the alarm grade of the fault alarm signal; determining a fault processing flow according to the alarm grade; and carrying out fault processing according to the fault processing flow. Therefore, by implementing the implementation mode, the fault can be automatically monitored, the fault classification judgment can be automatically carried out, the corresponding automatic processing can be carried out, the safety is high, the fault processing effect is good, and the safety of a power battery laboratory is further ensured.

Description

A kind of power battery laboratory fault handling method and device

technical field

The present application relates to the field of battery technology, and in particular, to a method and device for handling faults in a power battery laboratory.

Background technique

The new energy vehicle industry is developing rapidly. Lithium-ion power battery, as the core technology of new energy vehicle power propulsion system, has been highly concerned and widely studied by industry and academia, and has achieved certain scientific and technological achievements. The safety protection of the existing power battery system laboratory solutions, usually in the event of an abnormality in the power battery test, still needs to rely on the operator to actively judge whether corresponding measures should be taken and how to take corresponding measures safely. It can be seen that the existing method requires manual fault judgment and manual processing, which has low security and poor fault processing effect.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present application is to provide a power battery laboratory fault processing method and device, which can automatically monitor faults, automatically perform fault classification judgment and perform corresponding automatic processing, with high safety and good fault processing effect, which is conducive to guaranteeing Power battery laboratory safety.

A first aspect of the embodiments of the present application provides a power battery laboratory fault handling method, including:

Receive the fault alarm signal output by the power battery laboratory;

determining the alarm level of the fault alarm signal;

Determine the fault handling process according to the alarm level;

Perform fault processing according to the fault processing flow.

In the above implementation process, the method can preferentially receive the fault alarm signal output by the power battery laboratory; then determine the alarm level of the fault alarm signal; then determine the fault handling process according to the alarm level; and finally perform fault handling according to the fault handling process. It can be seen that the implementation of this embodiment can automatically monitor faults, automatically perform fault classification judgment and perform corresponding automatic processing, with high safety and good fault processing effect, which is conducive to ensuring the safety of the power battery laboratory.

Further, the determining the fault handling process according to the alarm level includes:

When the alarm level is the first level, it is determined that the fault handling process is the first level fault handling process;

When the alarm level is the second level, it is determined that the fault handling process is the secondary fault handling process;

When the alarm level is level 3, it is determined that the fault handling process is a level 3 fault handling process.

Further, performing fault processing according to the fault processing flow includes:

Control the power battery laboratory to enter a fault processing mode according to the fault processing flow;

In the fault handling mode, control the power battery laboratory to pop up an alarm information dialog box, and output sound and light alarm information;

Control the power battery laboratory to perform a fault processing operation according to the fault processing flow;

Judging whether the state of the test equipment in the power battery laboratory is a fault reset state;

If yes, control the power battery laboratory to resume the battery test mode.

Further, the controlling the power battery laboratory to perform a fault processing operation according to the fault processing procedure includes:

When the alarm level is the first level, the current of the battery simulator in the power battery laboratory is controlled to decrease to 0 according to a preset first rate, and the voltage of the battery simulator is controlled to decrease to 0 according to a preset second rate 0, and control the output power of the battery simulator to decrease to 0 according to a preset third rate;

Controlling the walk-in environmental box in the power battery laboratory to restore the temperature in the walk-in environmental box to within a first preset temperature range according to a fourth rate;

The cooling circulating water machine in the power battery laboratory is controlled to maintain the original operating state.

Further, the controlling the power battery laboratory to perform a fault processing operation according to the fault processing procedure includes:

When the alarm level is Level 2, sending a first emergency stop command to the redundant voltage monitoring device, so that the redundant voltage monitoring device disconnects the high-voltage relay according to the first emergency stop command;

sending a second emergency stop instruction to the battery pack management system, and controlling the battery simulator to disconnect the output relay, and controlling the battery simulator output current and output voltage to drop to 0 at the same time;

controlling the walk-in environmental box in the power battery laboratory to restore the temperature in the walk-in environmental box to within a second preset temperature range according to a fifth rate;

The cooling circulating water machine in the power battery laboratory is controlled to shut down.

Further, the controlling the power battery laboratory to perform a fault processing operation according to the fault processing procedure includes:

When the alarm level is level three, control the accident exhaust system in the power battery laboratory to start;

sending a third emergency stop command to the redundant voltage monitoring device, so that the redundant voltage monitoring device disconnects the high-voltage relay according to the third emergency stop command;

sending a fourth emergency stop instruction to the battery pack management system, and controlling the battery simulator to disconnect the output relay, and controlling the battery simulator output current and output voltage to drop to 0 simultaneously;

controlling the shutdown of the battery simulator and the walk-in environmental chamber in the power battery laboratory;

Turn on the sprinkler fire extinguishing system of the walk-in environmental box, so that the sprinkler fire extinguishing system can perform water spray fire extinguishing;

The cooling circulating water machine in the power battery laboratory is controlled to shut down.

A second aspect of the embodiments of the present application provides a power battery laboratory fault processing device, and the power battery laboratory fault processing device includes:

The receiving unit is used to receive the fault alarm signal output by the power battery laboratory;

a first determining unit, configured to determine the alarm level of the fault alarm signal;

a second determining unit, configured to determine a fault handling process according to the alarm level;

A fault processing unit, configured to perform fault processing according to the fault processing flow.

In the above implementation process, the power battery laboratory fault processing device can receive the fault alarm signal output by the power battery laboratory through the receiving unit; and determine the alarm level of the fault alarm signal through the first determination unit; The determination unit determines the fault processing flow according to the alarm level; finally, the fault processing unit is used to perform fault processing according to the fault processing flow. It can be seen that the implementation of this embodiment can automatically monitor faults, automatically perform fault classification judgment and perform corresponding automatic processing, with high safety and good fault processing effect, which is conducive to ensuring the safety of the power battery laboratory.

Further, the second determining unit is specifically configured to determine that the fault handling process is a primary fault handling process when the alarm level is level 1; and determine a fault handling process when the alarm level is level 2 It is the second-level fault processing flow; when the alarm level is the third-level, the fault processing flow is determined to be the third-level fault processing flow.

A third aspect of an embodiment of the present application provides an electronic device, including a memory and a processor, where the memory is used to store a computer program, and the processor runs the computer program to cause the electronic device to execute the first embodiment of the present application. The power battery laboratory fault handling method according to any one of the aspects.

A fourth aspect of the embodiments of the present application provides a computer-readable storage medium, which stores computer program instructions. When the computer program instructions are read and run by a processor, any one of the first aspects of the embodiments of the present application is executed. The troubleshooting method of the power battery laboratory described in the item.

Description of drawings

In order to explain the technical solutions of the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that need to be used in the embodiments of the present application. It should be understood that the following drawings only show some embodiments of the present application, therefore It should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can also be obtained from these drawings without any creative effort.

1 is a schematic flowchart of a power battery laboratory fault handling method provided by an embodiment of the present application;

2 is a schematic structural diagram of a power battery laboratory fault processing device provided by an embodiment of the application;

3 is a flow chart of the safety control logic of a power battery system testing laboratory provided by an embodiment of the present application;

4 is a flow chart of first-level alarm logic judgment in a power battery system testing laboratory provided by an embodiment of the present application;

FIG. 5 is a flow chart of a second-level alarm logic judgment in a power battery system testing laboratory provided by an embodiment of the present application;

FIG. 6 is a flow chart of a third-level alarm logic judgment in a power battery system testing laboratory provided by an embodiment of the present application;

FIG. 7 is a processing flow chart of a first-level alarm device in a power battery system testing laboratory provided by an embodiment of the present application;

8 is a flowchart of processing a secondary alarm device in a power battery system testing laboratory provided by an embodiment of the present application;

FIG. 9 is a processing flow chart of a three-level alarm device in a power battery system testing laboratory provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

Example 1

Please refer to FIG. 1 . FIG. 1 provides a schematic flowchart of a method for handling a fault in a power battery laboratory according to an embodiment of the present application. Among them, the fault handling method of the power battery laboratory includes:

S101. Receive a fault alarm signal output by a power battery laboratory.

In this embodiment, corresponding to the alarm signal of the first-level alarm level, the application makes the following explanation:

1. The total voltage of the battery pack is over-voltage or under-voltage level 1 alarm (Voltmax1, Voltmin1): the fault is set according to the upper limit and the lower line value of the total voltage of the battery pack. When the battery simulator detects that the total voltage of the battery pack > the battery pack The fault is triggered when the maximum allowable total voltage or the total voltage of the battery pack detected by the battery simulator < the minimum allowable total voltage of the battery pack, when the minimum allowable total voltage of the battery pack ≤ the total voltage of the battery pack detected by the battery simulator ≤ the maximum allowable total voltage of the battery pack The fault recovery, fault confirmation and recovery time is 2000ms.

2. Battery pack charging current overcurrent level 1 alarm (Currmax1): set according to the upper limit value of the battery pack's charging current MAP table, and trigger the fault when the battery simulator output current > the battery pack current MAP table allows the maximum charging current value , when the output current of the battery simulator is less than or equal to the maximum charging current value allowed by the battery pack current MAP table, the fault is restored, and the fault confirmation and recovery time is 5000ms.

3. Battery pack charging power overload level 1 alarm (Powermax1): set according to the maximum allowable charging power of the battery pack. When the output power of the battery simulator > the maximum allowable charging power of the battery pack, the fault is triggered. When the output power of the battery simulator is less than or equal to the battery pack The fault recovers when the package allows the maximum charging power, and the fault confirmation and recovery time is 5000ms.

4. Battery simulator fault (E-storage Fault): When a serious fault occurs inside the battery simulator and affects the normal test development, the battery simulator fault position is 1. If the fault recovers, the battery simulator fault position is 0, and the fault confirmation and recovery time is 2000ms.

5. Battery simulator watchdog communication fault (E-storage Watchdog Fault): This fault is triggered when the communication between the battery simulator and the upper computer control system of the battery laboratory is lost, and the fault is eliminated after the communication is restored, and the fault confirmation and recovery time is 200ms .

6. The temperature in the walk-in environmental box is too high, and the level 1 alarm (Climatic Chamber Tempmax1): when the temperature in the walk-in environmental box > the set upper limit of the walk-in environmental box, the fault is triggered. When the temperature inside the walk-in environment box is less than or equal to the set upper limit of the walk-in environment box, the fault will recover, and the fault confirmation and recovery time is 5000ms.

7. Climatic Chamber Fault: When a serious fault occurs inside the walk-in environmental chamber, which affects the normal test, the fault position of the walk-in environmental chamber is 1. If the fault is restored, the fault position of the walk-in environmental chamber is located. 0, the fault confirmation and recovery time is 2000ms.

8. Climatic Chamber Watchdog Fault: This fault is triggered when the communication between the walk-in environmental chamber and the upper computer control system of the battery laboratory is lost. After the communication is restored, the fault is eliminated, and the fault is confirmed and recovered. The time is 500ms.

9. Level 1 alarm for over-current flow of cooling water circulating water machine (CoolantFlowmax1): This fault is triggered when the cooling liquid flow rate of the cooling circulating water machine > the maximum allowable flow rate of the battery pack coolant. The fault recovers when the coolant allows the maximum flow, and the fault confirmation and recovery time is 5000ms.

10. Coolant Tempmax1 level 1 alarm for over-temperature coolant temperature of the cooling circulating water machine: This fault is triggered when the cooling water temperature of the cooling circulating water machine > the maximum allowable temperature of the battery pack coolant, and when the coolant temperature of the cooling circulating water machine is less than or equal to the battery pack The fault recovers when the coolant allows the highest temperature, and the fault confirmation and recovery time is 5000ms.

11. Coolant Condition System Fault: When the cooling water machine has a serious failure and cannot operate normally, the cooling water machine fault position is 1. If the fault is restored, the cooling water machine fault position is 0, and the fault is confirmed. And the recovery time is 2000ms.

12. Coolant Condition System WatchdogFault: This fault is triggered when the communication between the cooling water machine and the upper computer control system of the battery laboratory is lost. After the communication is restored, the fault is eliminated, and the fault confirmation and recovery time is 500ms.

13. Door Switch off: When the battery laboratory enters the battery test mode, the abnormal opening of the door will trigger an alarm, and the alarm will recover after the door is closed. The alarm confirmation and recovery time is 2000ms.

14. BMS fault (BMS ErrLvl): This alarm is triggered when a grade 4 serious fault occurs in the BMS. After the grade 4 fault is eliminated, the alarm is restored, and the alarm confirmation and recovery time is 200ms.

15. Cell voltage overvoltage alarm (CellVolt>CellVoltMax or CellVolt<CellVoltMin): when the cell voltage>cell allowable maximum voltage or cell voltage<cell allowable minimum voltage, the fault is triggered, when the cell allowable minimum voltage≤ When the cell voltage is less than or equal to the maximum allowable voltage of the cell, the fault confirmation and recovery time is 2000ms.

16. Battery temperature over-temperature alarm (BattTemp>BattTempmax): The fault is triggered when the cell temperature is greater than the maximum allowable temperature of the cell, and the fault is restored when the cell temperature is less than or equal to the maximum allowable temperature of the cell. The fault confirmation and recovery time is 2000ms.

17. BMS communication counter alarm (BMS Rolling Counter Fault): This fault is triggered when the BMS communication counter does not count in the order from 0-15. When the calculator resumes the calculation of 0-15, the fault will be restored, fault confirmation and recovery time. 100ms.

In this embodiment, corresponding to the alarm signal of the second-level alarm level, the application makes the following explanation:

1. The communication between the host computer control system of the battery laboratory and the safety control system is interrupted (Host Computer SystemWatchdog Fault): When the communication between the host computer control system of the battery laboratory and the safety control system of the battery laboratory is interrupted, the fault is triggered, and when the two systems return to normal The fault is recovered during communication, and the fault confirmation and recovery time is 500ms.

2. Redundant Voltage Monitoring DeviceWatchdog Fault: This fault is triggered when the communication between the redundant voltage monitoring device and the watchdog of the battery laboratory safety control system is interrupted. After the watchdog communication is restored The fault recovery, fault confirmation and recovery time is 500ms.

3. Fire Alarm System Watchdog Fault: This fault is triggered when the watchdog communication between the fire control system and the battery laboratory safety control system is interrupted, and the fault is restored after the watchdog communication fault is restored. , the fault confirmation and recovery time is 500ms.

4. Level 2 alarm of battery pack total voltage overvoltage or undervoltage (Voltmax2, Voltmin2): This fault is triggered when the battery simulator detects the total battery pack voltage > Voltmax1+2V or the battery simulator detects the battery pack total voltage <Voltmin1-2V , when Voltmin1-2V≤Battery simulator detects the total voltage of battery pack≤Voltmax1+2V, the fault is recovered, and the fault confirmation and recovery time is 2000ms.

5. The battery pack charging current overcurrent level 2 alarm (Currmax2): when the output current of the battery simulator is greater than 1.1×Currmax1+5A, the fault is triggered. When the output current of the battery simulator is less than or equal to 1.1×Currmax1+5A, the fault is restored and the fault is The confirmation and recovery time is 2000ms.

6. Battery pack charging power overload level 2 alarm (Powermax2): When the output power of the battery simulator > Powermax1+20W, the fault is triggered, and when the output power of the battery simulator is less than or equal to Powermax1+20W, the fault is restored. The fault confirmation and recovery time is 2000ms.

7. Level 2 alarm (Climatic Chamber Tempmax2) if the temperature in the walk-in environmental box is too high: when the temperature in the walk-in environmental box is greater than Climatic Chamber Tempmax1+2°C, this fault is triggered. When the temperature in the walk-in environmental box is ≤ When the Climatic ChamberTempmax is 1+2°C, the fault is recovered, and the fault confirmation and recovery time is 2000ms.

8. Level 2 alarm (CoolantFlowmax2) of over-flow of coolant in the cooling circulating water machine: This fault is triggered when the cooling liquid flow rate of the cooling circulating water machine is greater than CoolantFlowmax1+2L/min. When the fault is restored, the fault confirmation and recovery time is 5000ms.

9. Level 2 alarm (CoolantTempmax2) for over-temperature coolant temperature of the cooling circulating water machine: this fault is triggered when the coolant temperature of the cooling circulating water machine is greater than CoolantTempmax1+2℃, and when the coolant temperature of the cooling circulating water machine is ≤CoolantTempmax1+2℃ The fault recovery, fault recovery and confirmation time is 5000ms.

10. Battery pack total voltage overvoltage redundant monitoring alarm (Voltmax3): The redundant voltage monitoring device detects that the total battery pack voltage is greater than Voltmax2+2V and triggers this fault. When the redundant voltage monitoring device detects that the battery pack total voltage is ≤Voltmax2+2V When the fault recovers, the fault recovery and confirmation time is 2000ms.

In this embodiment, corresponding to the alarm signal of the three-level alarm level, the application makes the following explanation:

1. Fire Detection Alarm: When the battery pack catches fire, high temperature heat radiation and a large amount of toxic gas are generated, which will trigger the alarm of smoke and temperature detectors. When the battery pack fire is extinguished, the alarm will resume, and the alarm confirmation and recovery time is 2000ms.

2. The battery simulator emergency stop switch is pressed (E-Storage Emergency-Stop): When the battery simulator emergency stop switch is pressed, the fault is triggered, and the fault recovers when the emergency stop switch is released.

3. Climatic Chamber Emergency-Stop: The fault is triggered when the emergency stop switch of the walk-in environmental chamber is pressed, and the fault is recovered when the emergency stop switch is released.

4. Coolant Condition System Emergency-Stop: When the emergency stop switch of the cooling water machine is pressed, the fault is triggered, and the fault is recovered when the emergency stop switch is released.

S102, determine the alarm level of the fault alarm signal.

In this embodiment, the condition for judging the state of the power battery system testing laboratory is BattLab_Fault_Flag=0×Y0+1×Y1+2×Y2+4×Y3, and the specific battery laboratory fault judgment flow is shown in FIG. 3 .

In this embodiment, when BattLab_Fault_Flag=0, it means that there is no fault in the battery system test laboratory, and the battery test mode can be entered normally. When BattLab_Fault_Flag=1, it means that the upper computer control system of the battery system test laboratory has triggered a first-level alarm fault, and it is necessary to enter the first-level fault processing mode of the battery system test laboratory for processing. When BattLab_Fault_Flag=2, it means that the safety control system of the battery system testing laboratory has triggered a secondary alarm fault, and it is necessary to enter the secondary fault processing mode of the battery system testing laboratory for processing. When BattLab_Fault_Flag=4, it means that the safety control system of the battery system test laboratory has triggered a third-level alarm fault, and it is necessary to enter the three-fault processing mode of the battery system test laboratory for processing. Among them, Y ₀ represents the fault-free flag bit of the battery system test laboratory, Y ₁ represents the flag bit of the first-level fault alarm of the battery system test laboratory, Y ₂ represents the flag bit of the second-level fault alarm of the battery system test laboratory, and Y ₃ represents The flag bit of the third-level fault alarm in the battery system test laboratory.

In this embodiment, the conditions for setting the flag Y ₁ of the first-level fault alarm in the battery system testing laboratory to "1" are: battery simulator, walk-in environmental box, cooling circulating water machine, battery system testing laboratory door, One of the devices such as the BMS or the battery pack triggers a first-level alarm fault. The specific level-1 fault triggering logic is shown in Figure 4.

Among them, the first-level alarm signal of the battery simulator: Voltmax1, Voltmin1, Currmax1, Powermax1, E-Storage Fault, E-Storage Watchdog Fault;

The first-level alarm signal of the walk-in environmental chamber: Climatic Chamber Tempmax1, Climatic ChamberFault, Climatic Chamber Watchdog Fault;

The first-level alarm signal of the cooling circulating water machine: CoolantFlowmax1, CoolantTempmax1, CoolantCondition System Fault, Coolant Condition System Watchdog Fault;

The first-level alarm signal of the battery system test laboratory door: Door Switch off;

BMS level 1 alarm signal: CellVoltMax, CellVoltMin, BattTempMax, ErrLvl, BMSRollating Counter.

In this embodiment, the conditions for setting the flag bit Y ₂ of the secondary fault alarm in the battery system testing laboratory to "1" are: battery simulator, walk-in environmental box, cooling circulating water machine, redundant voltage monitoring device, fire fighting One of the devices such as the control system triggers a secondary alarm fault. The specific secondary fault triggering logic is shown in Figure 5.

Among them, the secondary alarm signal of the battery simulator: Voltmax2, Voltmin2, Currmax2, Powermax2;

The second-level alarm signal of the walk-in environmental chamber: Climatic Chamber Tempmax2;

Secondary alarm signal of cooling circulating water machine: CoolantFlowmax2, CoolantTempmax2;

Secondary alarm signal of redundant voltage monitoring device: Voltmax3, Redundant Voltage Monitoring Device Watchdog Fault;

The secondary alarm signal of the communication between the upper computer control system of the battery laboratory and the safety control system: Host ComputerSystem Watchdog Fault.

Fire control system secondary alarm signal: Fire Alarm System Watchdog Fault.

In this embodiment, the condition for setting the flag bit Y3 of the _third -level fault alarm in the battery system test laboratory to "1" is: when one of the emergency stop switches of the battery simulator, the walk-in environmental box, and the cooling circulating water machine is pressed When the smoke or temperature sensor of the fire extinguishing system reaches the trigger threshold, the battery system test laboratory triggers a third-level alarm fault. The specific third-level fault triggering logic is shown in Figure 6.

Among them, the battery simulator three-level alarm signal: E-Storage Emergency-Stop;

Three-level alarm signal for walk-in environmental chamber: Climatic Chamber Emergency-Stop;

Three-level alarm signal of cooling circulating water machine: Coolant Condition System Emergency-Stop;

Three-level alarm signal of fire control system: Fire Detection Alarm.

S103. When the alarm level is level 1, determine that the fault handling process is a level 1 fault handling process; when the alarm level is level 2, determine that the fault handling process is a level 2 fault handling process; when the alarm level is level 3, Then it is determined that the fault handling process is a three-level fault handling process.

S104, control the power battery laboratory to enter the fault processing mode according to the fault processing flow.

S105. In the fault handling mode, control the power battery laboratory to pop up an alarm information dialog box, and output sound and light alarm information.

S106, control the power battery laboratory to perform a fault processing operation according to the fault processing flow.

Referring to FIG. 7, as an optional implementation manner, the power battery laboratory is controlled to perform fault processing operations according to the fault processing flow, including:

When the alarm level is level 1, the current of the battery simulator in the power battery laboratory is controlled to decrease to 0 according to the preset first rate, and the voltage of the battery simulator is controlled to decrease to 0 according to the preset second rate, and the battery simulation is controlled The output power of the controller is reduced to 0 according to the preset third rate;

Controlling the walk-in environmental box in the power battery laboratory to restore the temperature in the walk-in environmental box to within the first preset temperature range according to the fourth rate;

Control the cooling circulating water machine in the power battery laboratory to maintain the original operating state.

In this embodiment, an example of the first-level alarm fault handling process is as follows:

When the battery system test laboratory enters the first-level fault handling mode, a specific alarm information dialog box will pop up on the upper computer control system of the battery laboratory, the laboratory sound and light alarm will sound, and then the output current of the battery simulator will be 1A/ms. The slope of the battery simulator decreases to 0, then the output voltage of the battery simulator decreases to 0 at a rate of 2V/ms, and the output power of the battery simulator decreases to 0. The walk-in environmental chamber was used to restore the temperature inside the chamber to 25±5°C at a rate of 0.5°C/min. The cooling circulating water machine continues to maintain the original operating state. When the test personnel troubleshoot and reset the test equipment, the battery laboratory host computer control system re-judges the test equipment status. If the fault has been reset (BattLab_Fault_Flag=0), the battery laboratory resumes the battery test mode. If the battery laboratory There is still a first-level alarm fault (BattLab_Fault_Flag=1), then repeat the above-level alarm processing flow.

Referring to FIG. 8, as an optional implementation manner, the power battery laboratory is controlled to perform fault processing operations according to the fault processing flow, including:

When the alarm level is level two, send the first emergency stop instruction to the redundant voltage monitoring device, so that the redundant voltage monitoring device disconnects the high-voltage relay according to the first emergency stop instruction;

Send the second emergency stop command to the battery pack management system, and control the battery simulator to disconnect the output relay, and control the output current and output voltage of the battery simulator to drop to 0 at the same time;

Control the walk-in environmental box in the power battery laboratory to restore the temperature in the walk-in environmental box to within the second preset temperature range according to the fifth rate;

Control the cooling circulating water shut down in the power battery laboratory.

In this embodiment, an example of the secondary alarm fault handling process is as follows:

When the battery system test laboratory enters the secondary fault handling mode, a specific alarm information dialog box will pop up on the battery laboratory safety control system first, the laboratory sound and light alarm will sound, and then the battery simulator will be controlled by the battery laboratory host computer. The system sends an emergency stop command to the battery pack BMS, the battery simulator disconnects the output relay, and reduces the output current and output voltage to 0 at the same time within 30ms, and the battery simulator automatically shuts down after a delay of 5s. At the same time, the battery laboratory safety control system sends an emergency stop command to the redundant voltage monitoring device, and the redundant voltage monitoring device disconnects the high-voltage relay within 30ms. Then the walk-in environmental box restores the temperature inside the box to 25±5°C at a rate of 0.5°C/min, and the walk-in environmental box shuts down after a delay of 5s. Then the cooling circulating water shuts down. After the test personnel troubleshoot and reset the test equipment, the battery laboratory host computer control system re-judges the test equipment status. If the fault has been reset (BattLab_Fault_Flag=0), the battery laboratory resumes the battery test mode. If there is still a second-level alarm fault (BattLab_Fault_Flag=2) in the room, the above-mentioned second-level alarm processing flow is repeated.

Referring to FIG. 9, as an optional implementation manner, the power battery laboratory is controlled to perform fault processing operations according to the fault processing flow, including:

When the alarm level is level 3, control the accident exhaust system in the power battery laboratory to start;

sending a third emergency stop command to the redundant voltage monitoring device, so that the redundant voltage monitoring device disconnects the high-voltage relay according to the third emergency stop command;

Send the fourth emergency stop command to the battery pack management system, and control the battery simulator to disconnect the output relay, and control the output current and output voltage of the battery simulator to drop to 0 at the same time;

Control the shutdown of walk-in environmental chambers in battery simulators and power battery laboratories;

Turn on the sprinkler fire extinguishing system of the walk-in environmental box, so that the sprinkler fire extinguishing system can sprinkle water;

Control the cooling circulating water shut down in the power battery laboratory.

In this embodiment, an example of the three-level alarm fault handling process is as follows:

When the battery system testing laboratory enters the three-level fault handling mode, a specific alarm information dialog box will pop up on the safety control system of the battery laboratory, the laboratory sound and light alarm will sound, and the laboratory accident exhaust system will be automatically turned on. Then the battery simulator sends an emergency stop command to the battery pack BMS through the upper computer control system of the battery laboratory, the battery simulator disconnects the output relay, and reduces the output current and output voltage to 0 at the same time within 30ms. After a delay of 5s, the battery simulator Automatic shut-down. At the same time, the battery laboratory safety control system sends an emergency stop command to the redundant voltage monitoring device, and the redundant voltage monitoring device disconnects the high-voltage relay within 30ms. Then the walk-in environmental box is turned off and the sprinkler fire extinguishing system is automatically turned on. The environmental box forms a 0.5m deep pool within 5 minutes, submerges the battery pack to extinguish the fire, and then shuts down the cooling circulating water. After the test personnel troubleshoot and reset the test equipment, the battery laboratory host computer control system re-judges the test equipment status. If the fault has been reset (BattLab_Fault_Flag=0), the battery laboratory resumes the battery test mode. If there is still a third-level alarm fault (BattLab_Fault_Flag=4) in the room, the above three-level alarm processing flow is repeated.

S107 , judging whether the state of the test equipment in the power battery laboratory is a fault-reset state, and if so, execute step S108 ; if not, end the process.

S108, control the power battery laboratory to restore the battery test mode.

In this embodiment, the execution body of the method may be a computing device such as a computer and a server, which is not limited in this embodiment.

In this embodiment, the safety protection of the existing power battery system laboratory scheme mainly has two levels. First, the BMS protection on the battery pack. By writing appropriate safety control programs and safety fault thresholds, the BMS can charge and discharge the battery pack. The voltage, current and temperature values are limited, and the charging and discharging current of the battery pack is limited and protected according to different fault levels; 2. The upper computer control program of the battery simulator device body is protected, and the battery pack voltage value, current value and Temperature value, and then set a reasonable protection threshold through the host computer. When the battery pack parameter exceeds the threshold, the battery simulator will stop charging and discharging the battery pack. 3. In the existing battery laboratory, a pit is often dug inside the laboratory to store water. When the battery catches fire, the battery pack is transported to the pit by manual forklift for flooding and extinguishing.

The improvement directions of this scheme are as follows: 1. On the basis of the original safety protection, the redundant voltage monitoring device for active safety protection measures is added, which can prevent the failure of the safety protection measures of the upper computer system of the battery simulator and the defects in the safety protection strategy of the battery pack BMS software. Under the circumstance of preventing the overcharging of the power battery pack; 2. All the faults in the existing power battery system test laboratory have been reorganized, and the conditions for each fault to be triggered, the conditions for fault recovery, and the triggering and recovery of faults. time was clarified. Then, according to the severity of the battery laboratory failure and the degree of damage impact, the laboratory is classified into the primary, secondary and tertiary alarms, and the logic conditions for triggering the primary, secondary and tertiary alarms are described in detail. and definitions. 3. A detailed definition of the first-level, second-level, and third-level alarm fault handling procedures in the battery system testing laboratory. 4. Considering that when the power battery pack catches fire, the battery pack is in an extremely unstable thermal runaway state, and there is a serious safety risk in transporting the power battery pack by forklift. This plan considers using the main body of the walk-in environmental box to lay TPO waterproof membrane, add water baffles, and cooperate with the sprinkler fire extinguishing system, which can form a pool in the environmental box and submerge the battery pack to extinguish the fire, which not only ensures the fire extinguishing effect, but at the same time , and eliminate the safety risk of personnel operation.

It can be seen that the implementation of the power battery laboratory fault processing method described in this embodiment can automatically monitor faults, automatically perform fault classification judgment and perform corresponding automatic processing, with high safety and good fault processing effect, which is conducive to ensuring power battery experiments. room security.

Example 2

Please refer to FIG. 2. FIG. 2 is a schematic structural diagram of a power battery laboratory fault processing device provided by an embodiment of the present application. As shown in Figure 2, the power battery laboratory fault handling device includes:

The receiving unit 210 is used for receiving the fault alarm signal output by the power battery laboratory;

a first determining unit 220, configured to determine the alarm level of the fault alarm signal;

The second determining unit 230 is configured to determine the fault handling process according to the alarm level;

The fault processing unit 240 is configured to perform fault processing according to the fault processing flow.

As an optional implementation manner, the second determining unit 230 is specifically configured to, when the alarm level is level 1, determine that the fault handling process is a level 1 fault handling process; when the alarm level is level 2, determine the fault handling process The process is the second-level fault handling process; when the alarm level is the third-level, it is determined that the fault handling process is the third-level fault handling process.

As an optional implementation manner, the fault processing unit 240 includes:

The control sub-unit 241 is used to control the power battery laboratory to enter the fault processing mode according to the fault processing flow;

The control subunit 241 is also used to control the power battery laboratory to pop up an alarm information dialog box and output sound and light alarm information in the fault handling mode;

The control subunit 241 is further configured to control the power battery laboratory to perform the fault processing operation according to the fault processing flow;

The judgment subunit 242 is used to judge whether the state of the test equipment in the power battery laboratory is a fault reset state;

The control sub-unit 241 is further configured to control the power battery laboratory to restore the battery test mode when the state of the test equipment of the power battery laboratory is the fault reset state.

As an optional implementation manner, the control sub-unit 241 is specifically configured to control the current of the battery simulator in the power battery laboratory to decrease to 0 according to the preset first rate when the alarm level is level 1, and control the battery simulator The voltage of the battery simulator decreases to 0 according to the preset second rate, and the output power of the battery simulator is controlled to decrease to 0 according to the preset third rate; the walk-in environment box in the power battery laboratory is controlled to restore the walk-in environment according to the fourth rate. The temperature in the box is within the first preset temperature range; the cooling circulating water machine in the power battery laboratory is controlled to maintain the original operating state.

As an optional implementation manner, the control sub-unit 241 is specifically configured to send the first emergency stop instruction to the redundant voltage monitoring device when the alarm level is level two, so that the redundant voltage monitoring device can follow the first emergency stop instruction Disconnect the high-voltage relay; send the second emergency stop command to the battery pack management system, and control the battery simulator to disconnect the output relay, and control the output current and output voltage of the battery simulator to drop to 0 at the same time; control the power battery laboratory to enter The temperature inside the walk-in environmental box is restored to within the second preset temperature range according to the fifth rate; the cooling circulating water machine in the power battery laboratory is controlled to be shut down.

As an optional embodiment, the control sub-unit 241 is specifically configured to control the start of the accident exhaust system in the power battery laboratory when the alarm level is level 3; send a third emergency stop instruction to the redundant voltage monitoring device to Make the redundant voltage monitoring device disconnect the high-voltage relay according to the third emergency stop instruction; send the fourth emergency stop instruction to the battery pack management system, and control the battery simulator to disconnect the output relay, and control the output current and output voltage of the battery simulator at the same time drop to 0; control the shutdown of the walk-in environmental box in the battery simulator and power battery laboratory; turn on the sprinkler fire extinguishing system of the walk-in environmental box, so that the sprinkler fire extinguishing system can sprinkle water; control the cooling cycle in the power battery laboratory Hydraulic machine.

In this embodiment, for the explanation of the power battery laboratory fault processing device, reference may be made to the description in Embodiment 1, which will not be repeated in this embodiment.

It can be seen that the implementation of the power battery laboratory fault processing device described in this embodiment can automatically monitor faults, automatically perform fault classification judgment and perform corresponding automatic processing, with high safety and good fault processing effect, which is conducive to ensuring power battery experiments. room security.

An embodiment of the present application provides an electronic device, including a memory and a processor, where the memory is used to store a computer program, and the processor runs the computer program to enable the electronic device to perform the power battery experiment in Embodiment 1 of the present application Room fault handling method.

The embodiment of the present application provides a computer-readable storage medium, which stores computer program instructions. When the computer program instructions are read and run by a processor, the power battery laboratory fault handling in the first embodiment of the present application is executed. method.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may also be implemented in other manners. The apparatus embodiments described above are merely illustrative, for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architectures, functions and possible implementations of apparatuses, methods and computer program products according to various embodiments of the present application. operate. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code that contains one or more functions for implementing the specified logical function(s) executable instructions. It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It is also noted that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented in dedicated hardware-based systems that perform the specified functions or actions , or can be implemented in a combination of dedicated hardware and computer instructions.

In addition, each functional module in each embodiment of the present application may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

If the functions are implemented in the form of software function modules and sold or used as independent products, they may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

The above descriptions are merely examples of the present application, and are not intended to limit the protection scope of the present application. For those skilled in the art, various modifications and changes may be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application. It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

Claims (10)

1. a power battery laboratory fault handling method, is characterized in that, comprises: Receive the fault alarm signal output by the power battery laboratory; determining the alarm level of the fault alarm signal; Determine the fault handling process according to the alarm level; Perform fault processing according to the fault processing flow. 2. The power battery laboratory fault processing method according to claim 1, wherein the determining the fault processing flow according to the alarm level comprises: When the alarm level is the first level, it is determined that the fault handling process is the first level fault handling process; When the alarm level is the second level, it is determined that the fault handling process is the secondary fault handling process; When the alarm level is level 3, it is determined that the fault handling process is a level 3 fault handling process. 3. The power battery laboratory fault processing method according to claim 1, wherein the fault processing according to the fault processing flow comprises: Control the power battery laboratory to enter a fault processing mode according to the fault processing flow; In the fault handling mode, control the power battery laboratory to pop up an alarm information dialog box, and output sound and light alarm information; Control the power battery laboratory to perform a fault processing operation according to the fault processing flow; Judging whether the state of the test equipment in the power battery laboratory is a fault reset state; If yes, control the power battery laboratory to resume the battery test mode. 4. The power battery laboratory fault processing method according to claim 3, wherein the controlling the power battery laboratory to perform fault processing operations according to the fault processing flow comprises: When the alarm level is the first level, the current of the battery simulator in the power battery laboratory is controlled to decrease to 0 according to a preset first rate, and the voltage of the battery simulator is controlled to decrease to 0 according to a preset second rate 0, and control the output power of the battery simulator to decrease to 0 according to a preset third rate; Controlling the walk-in environmental box in the power battery laboratory to restore the temperature in the walk-in environmental box to within a first preset temperature range according to a fourth rate; The cooling circulating water machine in the power battery laboratory is controlled to maintain the original operating state. 5. The power battery laboratory fault processing method according to claim 3, wherein the controlling the power battery laboratory to perform fault processing operations according to the fault processing flow comprises: When the alarm level is Level 2, sending a first emergency stop command to the redundant voltage monitoring device, so that the redundant voltage monitoring device disconnects the high-voltage relay according to the first emergency stop command; sending a second emergency stop instruction to the battery pack management system, and controlling the battery simulator to disconnect the output relay, and controlling the battery simulator output current and output voltage to drop to 0 at the same time; controlling the walk-in environmental box in the power battery laboratory to restore the temperature in the walk-in environmental box to within a second preset temperature range according to a fifth rate; The cooling circulating water machine in the power battery laboratory is controlled to shut down. 6. The power battery laboratory fault processing method according to claim 3, wherein the controlling the power battery laboratory to perform fault processing operations according to the fault processing flow comprises: When the alarm level is level three, control the accident exhaust system in the power battery laboratory to start; sending a third emergency stop command to the redundant voltage monitoring device, so that the redundant voltage monitoring device disconnects the high-voltage relay according to the third emergency stop command; sending a fourth emergency stop instruction to the battery pack management system, and controlling the battery simulator to disconnect the output relay, and controlling the battery simulator output current and output voltage to drop to 0 simultaneously; controlling the shutdown of the battery simulator and the walk-in environmental chamber in the power battery laboratory; Turn on the sprinkler fire extinguishing system of the walk-in environmental box, so that the sprinkler fire extinguishing system can perform water spray fire extinguishing; The cooling circulating water machine in the power battery laboratory is controlled to shut down. 7. A power battery laboratory fault processing device, wherein the power battery laboratory fault processing device comprises: The receiving unit is used to receive the fault alarm signal output by the power battery laboratory; a first determining unit, configured to determine the alarm level of the fault alarm signal; a second determining unit, configured to determine a fault handling process according to the alarm level; A fault processing unit, configured to perform fault processing according to the fault processing flow. 8 . The power battery laboratory fault processing device according to claim 7 , wherein the second determining unit is specifically used to determine that the fault handling process is a first-level fault when the alarm level is first-level. 9 . Processing flow; when the alarm level is the second level, the fault processing flow is determined to be the second-level fault processing flow; when the alarm level is the third level, the fault processing flow is determined to be the third-level fault processing flow. 9. An electronic device, characterized in that the electronic device comprises a memory and a processor, wherein the memory is used to store a computer program, and the processor executes the computer program to cause the electronic device to execute claims 1 to 10. The power battery laboratory fault handling method described in any one of 6. 10. A readable storage medium, wherein computer program instructions are stored in the readable storage medium, and when the computer program instructions are read and run by a processor, any one of claims 1 to 6 is executed. The described power battery laboratory fault handling method.

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