CN116148669A - Battery pack simulation system and method - Google Patents

Abstract

The invention discloses a battery pack simulation system and method. The system includes: a bidirectional programmable DC power supply module, a control unit and an acquisition module; wherein, the control unit includes a control module and a simulation module. The invention simulates the input characteristics, output characteristics, electric energy conversion characteristics and temperature control characteristics of the battery group in various working modes through the battery pack simulation system based on the bidirectional programmable DC power supply, the battery mathematical model and the thermal simulation mathematical model, Before the design and production of the real battery pack, various characteristics of the battery pack can be quickly and accurately simulated, which reduces production costs, improves production efficiency, and provides operators with maximum system integration functions.

Description

Battery pack simulation system and method

technical field

The invention belongs to the technical field of battery pack simulation, and more particularly relates to a battery pack simulation system and method.

Background technique

In the new energy power system, the battery pack is an indispensable part of the system as a component for providing and storing electric energy. Especially in the field of aviation and aerospace technology, the avionics system needs to carry out tests such as energy storage, loading, load shedding, energy matching, grid ripple detection, etc. during debugging and performance evaluation, all of which use battery packs as the working power supply. Because most of the new aviation and aerospace power systems are customized energy storage products, the development cycle of the battery pack is long, the production cost is high, the cycle life is short, the voltage regulation of the battery pack is difficult, and the frequent charge and discharge of the battery pack during the system joint debugging stage will affect the battery life. It will affect the safety of the test system and reduce the service life of the battery pack; therefore, it is necessary to quickly and accurately simulate the SOC dynamic characteristics of the battery pack before the design and production of the real battery pack, without mass production of the battery pack.

The information disclosed in the background of the present invention is only intended to deepen the understanding of the general background of the present invention, and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art known to those skilled in the art.

Contents of the invention

The purpose of the present invention is to propose a battery pack simulation system and method, which can transform the electric energy through the battery pack simulation system to obtain an electric energy curve similar to the volt-ampere characteristics of the real battery pack, simplify the operation difficulty, shorten the test period, and reduce the power system. Experimental safety risks, providing operators with maximized system integration capabilities.

According to a first aspect of the present invention, a battery pack simulation system is proposed, comprising:

Bidirectional programmable DC power supply module, used to simulate the charging and discharging function of the battery pack;

A control unit, including a control module and a simulation module;

The simulation module has a built-in simulation model, and the control module controls the bidirectional programmable DC power supply module to generate and dissipate electric energy according to the simulation model;

The collection module is used to collect the current signal of the bidirectional programmable DC power supply module to obtain the accumulation or dissipation of electric energy, and feed it back to the simulation module.

Optionally, the simulation model is a standard battery mathematical model and a standard battery thermal simulation mathematical model;

The standard battery mathematical model is used to generate the SOC curve of the simulated battery pack, and then obtain the input characteristics, output characteristics and electric energy conversion characteristics of the simulated battery pack;

The standard battery thermal simulation mathematical model is used to simulate the temperature rise of the simulated battery pack.

Optionally, also include:

The human-computer interaction module is used for the user to select the simulation model and configure the parameters of the simulation battery pack.

Optionally, also include:

A monitoring unit, including a monitoring module, a storage module and a display interface;

The monitoring module is used for real-time monitoring of the output characteristics and operating status of the battery pack simulation system, and feeds back to the control unit;

The storage module is used to store the monitoring data of the monitoring module;

The display interface is used to display the monitoring data of the monitoring module.

Optionally, also include:

Protection unit, including soft start module and thermal protection module;

The soft-start module is used for soft-starting the system, suppressing the instantaneous overshoot and surge of the system output;

The heat dissipation protection module is used for heat dissipation of the system.

Optionally, also include:

The power module is used to provide power for the battery pack simulation system.

According to a second aspect of the present invention, a battery pack simulation method is proposed, comprising:

Select a simulation model through the human-computer interaction module, and configure the parameters of the simulated battery pack in the simulation model;

The control module controls the bidirectional programmable DC power supply module to generate and dissipate electric energy according to the simulation model, and simulates the charging and discharging function of the battery pack;

Collect the current signal of the bidirectional programmable DC power supply module through the collection module to obtain the cumulative amount or dissipation of electric energy, and feed it back to the simulation module;

The simulation module adjusts the port voltage and current of the bidirectional DC power supply module through the control module according to the cumulative amount or dissipation of the electric energy, and then obtains the input characteristics, output characteristics, and electric energy conversion of the simulated battery pack. characteristic;

The simulation module completes the simulation of temperature rise changes by continuously iterating and modifying battery parameters, and obtains the temperature control characteristics of the simulated battery pack.

Optionally, the simulation model includes a standard battery mathematical model and a standard battery thermal simulation mathematical model;

The standard battery mathematical model is used to generate the simulated SOC curve of the simulated battery pack, and then obtain the input characteristics, output characteristics and electric energy conversion characteristics of the simulated battery pack;

The battery thermal simulation model is used to obtain the temperature control characteristics of the simulated battery pack.

Optionally, also include:

Import the measured SOC curve data of the single battery into the mathematical model of the standard battery, fit and generate the single battery rate combination model, and generate the SOC curve and the multi-cycle state capacity decline state of the simulated battery pack composed of the single battery curve.

Optionally, the collected current signal is integrated in a millisecond-level time dimension by the collection module to obtain a cumulative amount or a dissipated amount of electric energy.

The beneficial effect of the present invention is that: the present invention simulates the input characteristics, Output characteristics, power conversion characteristics and temperature control characteristics, before the design and production of the actual battery pack, quickly and accurately simulate the dynamic characteristics of the battery pack SOC, without the need for mass production of the battery pack, the electric energy is transformed through the battery pack simulation system to obtain a similar The power curve of the volt-ampere characteristics of the real battery pack reduces production costs, improves production efficiency, and provides operators with maximum system integration functions.

The system of the present invention has other features and advantages that will be apparent from or will be apparent from the drawings and detailed description that follow, incorporated herein. Set forth in detail in the manner, these drawings and the detailed description together serve to explain certain principles of the present invention.

Description of drawings

The above and other objects, features and advantages of the present invention will become more apparent by describing the exemplary embodiments of the present invention in more detail with reference to the accompanying drawings. In the exemplary embodiments of the present invention, the same reference numerals generally represent the same components .

Fig. 1 shows a schematic structural diagram of a battery pack simulation system according to the present invention.

Fig. 2 shows a schematic structural diagram of a battery pack simulation system according to Embodiment 1 of the present invention.

Fig. 3 shows a schematic structural diagram of a detection unit of a battery pack simulation system according to Embodiment 1 of the present invention.

1. Bidirectional programmable DC power supply module, 2. Control unit, 3. Control module, 4. Simulation module, 5. Acquisition module, 6. Protection unit, 7. Soft start module, 8. Thermal protection module, 9. Monitoring unit , 10. Human-computer interaction module, 11. Monitoring module, 12. Storage module, 13 Display interface.

Detailed ways

The present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

As shown in Figure 1, a battery pack simulation system according to the present invention includes:

Bidirectional programmable DC power supply module, used to simulate the charging and discharging function of the battery pack;

A control unit, including a control module and a simulation module;

The simulation module has a built-in simulation model, and the control module controls the bidirectional DC power supply to generate and dissipate electric energy according to the simulation model;

The collection module is used to collect the current signal of the bidirectional programmable DC power supply module to obtain the accumulation or dissipation of electric energy, and feed it back to the simulation module.

Specifically, in the present invention, the battery pack simulation system includes: a bidirectional programmable DC power supply module, a control unit, and an acquisition module; wherein, the control unit includes a control module and a simulation module;

The battery pack is simulated through the simulation model built in the simulation module, and the parameters of the simulated battery pack are input in the simulation model. The control module controls the bidirectional programmable DC power supply module to generate and dissipate electric energy according to the simulation model, and simulates the charging and discharging function of the battery pack. ;The acquisition module collects the current signal of the bidirectional programmable DC power supply module to obtain the accumulation or dissipation of electric energy, and feeds it back to the simulation module. Through the PID correction of the second-order system of the simulation module, the data results are calculated in real time and continuously iterated , modify the parameters (voltage, current, remaining power, simulation temperature, etc.) of the battery pack simulation system, and realize the closed-loop simulation of the battery pack simulation system.

In an example, the simulation model is a standard battery mathematical model and a standard battery thermal simulation mathematical model;

The standard battery mathematical model is used to generate the SOC curve of the simulated battery pack;

The standard battery thermal simulation mathematical model is used to simulate the temperature rise of the battery pack.

Specifically, the SOC curve of the simulated battery pack is generated by inputting the series/parallel relationship and the number of cycles of the simulated battery pack in the standard battery mathematical model of the simulation module;

Or, by inputting the series/parallel relationship of the simulated battery pack, the number of cycles and the parameters of the single battery in the standard battery mathematical model of the simulation module, the SOC curve of the simulated battery pack is generated;

Input the constant ambient temperature and air pressure through the standard battery thermal simulation mathematical model, cooperate with the standard battery mathematical model, and simulate the temperature change of the simulated battery pack in real time according to the change of the power of the simulated battery pack;

Or input the dynamic ambient temperature and air pressure through the standard battery thermal simulation mathematical model, cooperate with the standard battery mathematical model, and simulate the temperature change of the simulated battery pack in real time according to the changes in temperature, air pressure and simulated battery pack power.

For example, by importing the measured SOC curve data of the single battery into the standard battery mathematical model, that is, the single-rate multi-cycle data, multi-rate single-cycle data and multi-rate multi-cycle data of the single battery, by setting the initial SOC, initial battery The number of charging and discharging cycles of the battery pack is used to generate the simulated SOC curve of the battery pack composed of the single battery pack and its multi-cycle state capacity decline state;

By inputting the temperature and air pressure of the standard atmospheric environment into the standard battery thermal simulation mathematical model, and calling the standard battery thermal simulation mathematical model, thermal simulation is performed, and the theoretical design value of the single battery in the standard atmospheric environment is configured or the charging of the single battery is different. The measured temperature data of the discharge rate, in the process of simulating the charging and discharging of the battery pack, the system continuously iterates and modifies the parameters of the battery pack, so as to complete the simulation of the temperature rise change and obtain the temperature rise change of the simulated battery pack in the standard atmospheric environment.

In one example, in the present invention, the battery pack simulation system further includes:

The human-computer interaction module is used for the user to select the simulation model and configure the parameters of the simulation battery pack.

Specifically, the user selects the standard battery mathematical model and the standard battery thermal simulation mathematical model through the human-computer interaction module, and configures parameters such as the series/parallel relationship of the simulated battery pack, cycle times, ambient temperature, and air pressure in the model.

For example, the human-computer interaction module can be a keyboard, mouse or touch operation device, etc.;

The user selects the standard battery mathematical model through the human-computer interaction module, and configures the series/parallel relationship and cycle times of the simulated battery pack in the model;

Or, the user selects the standard battery mathematical model through the human-computer interaction module, and configures the series/parallel relationship and cycle times of the simulated battery pack in the model, and inputs the parameters of the single battery, such as voltage, current, capacity, internal resistance and other parameters , to replace the single battery parameters in the standard battery mathematical model.

In one example, in the present invention, the battery pack simulation system further includes:

A monitoring unit, including a monitoring module, a storage module and a display interface;

The monitoring module is used to monitor the output characteristics and operating status of the battery pack simulation system in real time, and feed back to the control unit;

The storage module is used to store the monitoring data of the monitoring module;

The display interface is used to display the monitoring data of the monitoring module.

Specifically, the monitoring module can monitor the output characteristics and operating status of the system in real time, and feed back to the control unit of the system; the monitoring module can monitor the secondary status of energy nodes through the sensors and signal conditioning devices inside the system, and can collect power distribution channels in real time. The voltage and current values are fed back to the control unit of the system for remote adjustment data review; the monitoring module can display the system remote adjustment data and monitoring data on the display interface in real time and store them in the storage module, by viewing the stored voltage and current waveforms , analyze the operating status of the system, and give real-time early warning of possible faults in the system, wherein the display interface can also display a human-computer interaction interface.

In one example, in the present invention, the battery pack simulation system further includes:

Protection unit, including soft start module and thermal protection module;

The soft start module is used in the soft start system to suppress the instantaneous overshoot and surge of the system output;

The thermal protection module is used for cooling the system.

Specifically, the soft start module is to prevent the voltage overshoot of the bidirectional programmable DC power supply module at the moment of output, and protect the external power equipment of the battery pack simulation system; the soft start protection method is used inside the system to suppress the output of the battery simulation system. Overshoot phenomenon and surge phenomenon; the heat dissipation protection module is to prevent the internal temperature of the battery simulation system from being too high due to long-term high-power operation, and to dissipate heat from the system; for the inductive load characteristics of the external equipment connected to the system, it can also The back EMF dissipator is used to provide safety protection for the system and other external equipment.

For example, the thermal protection module can use air cooling to dissipate heat from the system.

In one example, in the present invention, the battery pack simulation system further includes:

The power module is used to provide power for the battery pack simulation system.

Specifically, the power supply module is used to provide power to modules in the system such as a bidirectional programmable DC power supply module, a control module, a simulation module and an acquisition module.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

Example 1

As shown in Figure 2, this embodiment provides a battery pack simulation system, including:

Bidirectional programmable DC power supply module 1, used to simulate the charging and discharging function of the storage battery pack;

A control unit 2, including a control module 3 and a simulation module 4;

The simulation module 4 has a built-in simulation model, and the control module 3 controls the bidirectional programmable DC power supply module 1 to generate and dissipate electric energy according to the simulation model;

The collection module 5 is used to collect the current signal of the bidirectional programmable DC power supply module 1 to obtain the accumulation or dissipation of electric energy, and feed it back to the simulation module 4 .

The protection unit 6 includes a soft start module 7 and a heat dissipation protection module 8;

The soft-start module 7 is used for the soft-start system to suppress the instantaneous overshoot and surge phenomena of the system output;

The heat dissipation protection module 8 is used to dissipate heat to the system;

The monitoring unit 9 includes a monitoring module 11, a storage module 12 and a display interface 13, as shown in Figure 3;

The monitoring module 11 is used for real-time monitoring of the output characteristics and operating status of the battery pack simulation system, and feedback to the control unit;

The storage module 12 is used to store the monitoring data of the monitoring module;

The display interface 13 is used to display the monitoring data of the monitoring module.

The human-computer interaction module 10 is used for the user to select the simulation model and configure the parameters of the simulation battery pack.

Example 2

This embodiment provides a battery pack simulation method, including:

Select the standard battery mathematical model built in the simulation module through the human-computer interaction module, and configure the series/parallel relationship and cycle times of the simulated battery pack to generate the simulated SOC curve of the simulated battery pack;

Or configure the parameters of the single battery in the standard battery mathematical model, such as voltage, current, capacity, internal resistance and other parameters, replace the single battery parameters in the standard battery mathematical model, and generate the simulated SOC curve of the simulated battery pack;

Or import the measured SOC curve data of the single battery into the standard battery mathematical model, that is, the single-rate multi-cycle data, multi-rate single-cycle data and multi-rate multi-cycle data of the single battery, and fit and generate a battery composed of the single battery Group simulation SOC curve and its multi-cycle state capacity decline state curve;

The control module controls the bidirectional programmable DC power supply module to generate and dissipate electric energy according to the configured standard battery mathematical model, and simulates the charging and discharging function of the battery pack;

Collect the current signal of the bidirectional programmable DC power supply module through the acquisition module to obtain the accumulation or dissipation of electric energy, and feed it back to the simulation module;

The simulation module adjusts the port voltage and current of the bidirectional DC power supply module through the control module according to the accumulation or dissipation of electric energy, and simulates the input characteristics, output characteristics and electric energy conversion characteristics of the battery pack in various working modes in the energy transfer system;

Select the standard battery thermal simulation mathematical model built in the simulation module through the human-computer interaction module, and configure constant temperature and air pressure or dynamic temperature and air pressure, and then configure the theoretical design value of the single battery in the standard atmospheric environment or import the single battery The measured temperature data of different charge and discharge ratios; calling the standard battery mathematical model, during the battery pack charge and discharge simulation process, the simulation module continuously iterates and modifies the battery parameters, thereby completing the simulation of temperature rise and obtaining the temperature control characteristics of the simulated battery pack .

Having described various embodiments of the present invention, the foregoing description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and alterations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims (10)

1. A battery pack simulation system, characterized in that, comprising: Bidirectional programmable DC power supply module, used to simulate the charging and discharging function of the battery pack; A control unit, including a control module and a simulation module; The simulation module has a built-in simulation model, and the control module controls the bidirectional programmable DC power supply module to generate and dissipate electric energy according to the simulation model; The collection module is used to collect the current signal of the bidirectional programmable DC power supply module to obtain the accumulation or dissipation of electric energy, and feed it back to the simulation module. 2. A battery pack simulation system according to claim 1, wherein the simulation model is a standard battery mathematical model and a standard battery thermal simulation mathematical model; The standard battery mathematical model is used to generate the SOC curve of the simulated battery pack, and then obtain the input characteristics, output characteristics and electric energy conversion characteristics of the simulated battery pack; The standard battery thermal simulation mathematical model is used to simulate the temperature rise of the simulated battery pack, and then obtain the temperature control characteristics of the simulated battery pack. 3. A battery pack simulation system according to claim 1, further comprising: The human-computer interaction module is used for the user to select the simulation model and configure the parameters of the simulation battery pack. 4. A battery pack simulation system according to claim 1, further comprising: A monitoring unit, including a monitoring module, a storage module and a display interface; The monitoring module is used for real-time monitoring of the output characteristics and operating status of the battery pack simulation system, and feeds back to the control unit; The storage module is used to store the monitoring data of the monitoring module; The display interface is used to display the monitoring data of the monitoring module. 5. A battery pack simulation system according to claim 1, further comprising: Protection unit, including soft start module and thermal protection module; The soft-start module is used for soft-starting the system, suppressing the instantaneous overshoot and surge of the system output; The heat dissipation protection module is used for heat dissipation of the system. 6. A battery pack simulation system according to claim 1, further comprising: The power module is used to provide power for the battery pack simulation system. 7. A battery pack simulation method, characterized in that, comprising: Select a simulation model through the human-computer interaction module, and configure the parameters of the simulated battery pack in the simulation model; The control module controls the bidirectional programmable DC power supply module to generate and dissipate electric energy according to the configured simulation model, and simulates the charging and discharging function of the battery pack; Collect the current signal of the bidirectional programmable DC power supply module through the collection module to obtain the cumulative amount or dissipation of electric energy, and feed it back to the simulation module; The simulation module adjusts the port voltage and current of the bidirectional DC power supply module through the control module according to the cumulative amount or dissipation of the electric energy, and then obtains the input characteristics, output characteristics, and electric energy conversion of the simulated battery pack. characteristic; The simulation module completes the simulation of temperature rise changes by continuously iterating and modifying battery parameters, and obtains the temperature control characteristics of the simulated battery pack. 8. A battery pack simulation method according to claim 7, wherein the simulation model comprises a standard battery mathematical model and a standard battery thermal simulation mathematical model; The standard battery mathematical model is used to generate the simulated SOC curve of the simulated battery pack, and then obtain the input characteristics, output characteristics and electric energy conversion characteristics of the simulated battery pack; The thermal simulation model of the battery is used to obtain the temperature rise change of the simulated battery pack, and obtain the temperature control characteristics of the simulated battery pack. 9. A battery pack simulation method according to claim 8, further comprising: Import the measured SOC curve data of the single battery into the mathematical model of the standard battery, fit and generate the single battery rate combination model, and generate the SOC curve and the multi-cycle state capacity decline state of the simulated battery pack composed of the single battery curve. 10 . The method for simulating a storage battery pack according to claim 7 , wherein the acquisition module integrates the collected current signal in a millisecond-level time dimension to obtain the cumulative amount or dissipated amount of electric energy. 11 .

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