CN-116736014-B - Battery simulator capable of accurately simulating steady state characteristics and transient state characteristics of battery

Abstract

The invention provides a battery simulator capable of accurately simulating steady-state characteristics and transient characteristics of a battery, which comprises a main control module, a battery characteristic simulation module and a sampling module, wherein the battery characteristic simulation module outputs an adjustable load, the battery characteristic simulation module comprises a steady-state characteristic simulation branch and at least one transient characteristic simulation branch, the transient characteristic simulation branch is connected into or connected out of a simulation loop through control of a change-over switch so as to simulate the condition of abrupt change of output voltage of the battery during transient, the steady-state characteristic simulation branch and the transient characteristic simulation branch both comprise voltage regulating circuits, and the main control module regulates the output voltages of the steady-state characteristic simulation branch and the transient characteristic simulation branch through control of the voltage regulating circuits. The invention can simulate the discharge characteristic of the battery when the output voltage of the battery suddenly changes in transient state, and the main control module can also adjust the adjustable load, so that the discharge characteristic of the battery according to a specific load change rule can be simulated.

Inventors

• FAN XUHONG
• WANG JIAQI
• ZHAO DAIPING
• CHENG DONGXIN
• SHI JINTAO
• SHI ZEKUN
• CHEN XIAOJUN
• Zhao Rigeng
• WANG ZHIGANG
• CHANG XIAOJUE
• LI ZHI
• CUI ZHIQIANG
• YU JUNYAO
• YUAN ZHIHAI
• LI WEI

Assignees

• 山西建筑工程集团有限公司

Dates

Publication Date

20260505

Application Date

20230613

Claims (8)

1. 1. The utility model provides a battery simulator that can accurately simulate battery steady state characteristic and transient state characteristic, includes main control module, battery characteristic simulation module and sampling module at least, main control module passes through control signal regulation battery characteristic simulation module's output voltage, sampling module is used for gathering battery characteristic simulation module's output voltage and output current and with it is transmitted main control module, its characterized in that: the battery characteristic simulation module is connected with an adjustable load and outputs the adjustable load; The battery characteristic simulation module comprises a steady-state characteristic simulation branch and at least one transient characteristic module The transient characteristic simulation branch circuit is connected into or out of a simulation loop through control of a change-over switch so as to simulate the condition of abrupt change of the output voltage of the battery during transient; The main control module adjusts output voltages of the steady-state characteristic simulation branch and the transient characteristic simulation branch by controlling the voltage regulating circuit, and the change-over switch comprises an H-bridge change-over switch.
2. 2. The battery simulator of claim 1, wherein the adjustable load is comprised of a Buck converter in series with a fixed load.
3. 3. The battery simulator of claim 1, wherein the battery characteristic simulation module further comprises a constant voltage output branch.
4. 4. The battery simulator capable of accurately simulating steady state characteristics and transient state characteristics of a battery according to claim 3, wherein isolated DC/DC converters are arranged on the steady state characteristic simulation branch, the transient state characteristic simulation branch and the constant voltage output branch.
5. 5. The battery simulator of claim 1, wherein the sampling module comprises an ADC sampling device having a sampling frequency in excess of 1MHz.
6. 6. The battery simulator of claim 1, wherein the battery simulator further comprises an ac power source for providing an operating voltage to the battery characteristic simulation module.
7. 7. The battery simulator capable of accurately simulating steady state and transient state characteristics of a battery according to claim 1, further comprising a display module electrically connected to the master control module and displaying electrical parameters of the battery simulator.
8. 8. The battery simulator capable of accurately simulating steady state and transient state characteristics of a battery according to claim 1, further comprising a host computer electrically connected to the main control module and inputting battery parameters to be simulated to the main control module.

Description

Battery simulator capable of accurately simulating steady state characteristics and transient state characteristics of battery Technical Field The invention relates to the technical field of battery simulators, in particular to a battery simulator capable of accurately simulating steady-state characteristics and transient characteristics of a battery. Background Batteries are used as a common power source in a plurality of experiments, and if a battery prototype is directly used for research, a great deal of cost is required for purchasing and maintaining the battery prototype, and on the other hand, the battery prototype can be damaged when subjected to the experiment under the extreme working condition. The battery simulator is used for accurately simulating the output characteristics of the battery, so that the battery is replaced to work in experiments, the problems can be solved, the research cost is greatly reduced, and the research progress is quickened. The battery simulators on the market have a plurality of types, but most of the battery simulators can only realize a simple steady-state charge and discharge function, and cannot well simulate transient characteristics when high-power loads are switched. For example, when the load suddenly increases, the battery has a dip in the output voltage in a very short period of time, which is in the order of μs or even ns, and the existing battery simulator cannot simulate the sudden change of the battery voltage only through the rectifier and the DC/DC converter. Content The invention aims to solve In order to solve the above problems, the present invention provides a battery simulator capable of accurately simulating the steady state characteristics and transient state characteristics of a battery. The invention provides a battery simulator capable of accurately simulating steady-state characteristics and transient characteristics of a battery, which comprises a main control module, a battery characteristic simulation module and a sampling module, wherein the main control module regulates the output voltage of the battery characteristic simulation module through a control signal, and the sampling module is used for collecting and transmitting the output voltage and the output current of the battery characteristic simulation module to the main control module, and is characterized in that: the battery characteristic simulation module is connected with the adjustable load and outputs the adjustable load; The battery characteristic simulation module comprises a steady-state characteristic simulation branch and at least one transient characteristic simulation branch, and the transient characteristic simulation branch is connected with or connected with a simulation loop through the control of a change-over switch so as to simulate the condition of abrupt change of the output voltage of the battery during transient; The main control module adjusts the output voltages of the steady-state characteristic simulation branch and the transient characteristic simulation branch by controlling the voltage regulating circuit. Preferably, the adjustable load consists of a Buck converter in series with a fixed load. Preferably, the switch comprises an H-bridge switch. Preferably, the battery characteristic simulation module further includes a constant voltage output branch. Preferably, the steady-state characteristic simulation branch, the transient characteristic simulation branch and the constant voltage output branch are all provided with isolation DC/DC converters. Preferably, the sampling module comprises ADC sampling means having a sampling frequency exceeding 1MHz. Preferably, the battery simulator further includes an ac power supply for supplying an operating voltage to the battery characteristic simulation module. Preferably, the display module is electrically connected with the main control module and displays the electrical parameters of the battery simulator. Preferably, the battery simulator further comprises an upper computer, wherein the upper computer is electrically connected with the main control module and inputs battery parameters to be simulated to the main control module. Compared with the prior art, the invention has the following advantages: The battery simulator capable of accurately simulating the steady-state characteristics and the transient characteristics of the battery can simulate the steady-state characteristics of the battery, can control the transient characteristic simulation branch to switch in and switch out of the simulation loop through the main control module, simulate the discharge characteristics of the battery when the output voltage of the battery suddenly changes during transient, and can adjust the adjustable load so as to simulate the discharge characteristics of the battery according to a specific load change rule. The battery simulator capable of accurately simulating the steady-state characteristic and the transient characte