CN113466730A - Storage battery internal resistance flash measurement device and method - Google Patents
Storage battery internal resistance flash measurement device and method Download PDFInfo
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- CN113466730A CN113466730A CN202110741472.2A CN202110741472A CN113466730A CN 113466730 A CN113466730 A CN 113466730A CN 202110741472 A CN202110741472 A CN 202110741472A CN 113466730 A CN113466730 A CN 113466730A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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Abstract
The invention discloses a device and a method for testing internal resistance flash of a storage battery, wherein the device comprises the following steps: the discharging module is used for discharging the storage battery; the synchronous sampling control module is used for controlling the voltage sampling and the discharging current sampling to be synchronous by adopting a synchronous signal; the acquisition module detects the monomer voltage and the battery pack charging and discharging current under the normal condition, and acquires the discharging data including the discharging current, the discharging voltage and the storage battery temperature by the discharging module when the storage battery internal resistance is tested, and sends the discharging data to the data processing module; the data processing module is used for analyzing the discharge data, calculating the internal resistance of the storage battery, judging whether the voltage of the storage battery is undervoltage or not, whether the internal resistance is overrun or not and whether the temperature of the storage battery is overhigh or not, and obtaining the state information of the storage battery; the display module is used for displaying the state information of the storage battery. The device adopts synchronous signal control voltage sampling and discharge current sampling synchronous, improves measurement accuracy, and the internal resistance of detection battery is fast, the accuracy is high and the reliability is high.
Description
Technical Field
The invention relates to the technical field of energy storage battery management, in particular to a storage battery internal resistance flash measurement device and method.
Background
The storage battery is used as a backup power supply of a power supply system, is widely applied to the fields of communication, banking, power supply, traffic, finance and the like, and the health condition and stability of the storage battery directly influence the stability and safety of key systems in the fields. Since the internal resistance of the battery is closely related to the capacity of the battery, the most important and most reflective of the current state of the storage battery is the internal resistance of the battery.
At present, methods for measuring the internal resistance of the battery are applied to a direct current high-current discharge method, an alternating current injection method and a direct current low-current discharge method. The direct current large current discharge method can measure relatively accurate internal resistance generally by discharging once, but the damage to the storage battery is overlarge. The alternating current injection method is easily interfered by electric waves, and the repeated measurement precision is not high. In contrast, the direct current low current discharge method can avoid the defects of the two methods and realize the measurement of the internal resistance of the storage battery. However, due to the characteristics of the internal devices of the storage battery, and the small voltage change during the small current discharge, the situation of data acquisition distortion may occur in the primary discharge process, thereby affecting the authenticity and accuracy of the internal resistance measured by the direct current small current discharge method. Therefore, the reliability and the accuracy of the internal resistance measurement of the storage battery are required to be improved on the premise of ensuring the damage of the storage battery in the conventional mode of measuring the internal resistance of the storage battery.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the device and the method for detecting the internal resistance of the storage battery in a flash mode, which can quickly, accurately and reliably detect the internal resistance of the storage battery.
In a first aspect, an embodiment of the present invention provides a device for flash measurement of internal resistance of a battery, including: a discharge module, a synchronous sampling control module, an acquisition module, a data processing module and a display module,
the discharging module is used for discharging the storage battery;
the synchronous sampling control module is used for controlling the voltage sampling and the discharging current sampling to be synchronous by adopting a synchronous signal;
the acquisition module detects the monomer voltage and the battery pack charging and discharging current under the normal condition, and acquires the discharging data acquired by the discharging module when the internal resistance of the storage battery is tested, wherein the discharging data comprises the discharging current, the discharging voltage and the temperature of the storage battery, and the discharging data is sent to the data processing module;
the data processing module is used for analyzing the discharge data, calculating the internal resistance of the storage battery, judging whether the voltage of the storage battery is undervoltage or not, whether the internal resistance is overrun or not and whether the temperature of the storage battery is overhigh or not, and obtaining the state information of the storage battery;
the display module is used for displaying the state information of the storage battery.
In a second aspect, the method for flash measurement of internal resistance of a storage battery provided in an embodiment of the present invention is applicable to the apparatus described in the above embodiment, and the method includes the following steps:
the discharging module discharges the storage battery;
the synchronous sampling control module adopts a synchronous signal to control the voltage sampling and the discharging current sampling to be synchronous;
the acquisition module acquires discharge data, the discharge data comprises discharge current, discharge voltage and storage battery temperature, and the discharge data is sent to the data processing module;
the data processing module analyzes the discharge data, calculates the internal resistance of the storage battery, and judges whether the voltage of the storage battery is undervoltage or not, whether the internal resistance is overrun or not and whether the temperature of the storage battery is overhigh or not to obtain the state information of the storage battery;
the display module displays the state information of the storage battery.
The invention has the beneficial effects that:
according to the device and the method for detecting the internal resistance of the storage battery, provided by the embodiment of the invention, the synchronous sampling of the voltage and the sampling of the discharge current are controlled by the synchronous signal, the measurement precision is improved, and the speed for detecting the internal resistance of the storage battery is high, and the accuracy and the reliability are high.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a block diagram showing a configuration of a device for detecting internal resistance of a battery according to a first embodiment of the present invention;
fig. 2 shows a flowchart of a method for detecting internal resistance of a battery according to a second embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Fig. 1 is a block diagram showing a configuration of a device for detecting internal resistance of a battery according to a first embodiment of the present invention, the device including: the device comprises a discharging module, a synchronous sampling control module, an acquisition module, a data processing module and a display module, wherein the discharging module is used for discharging the storage battery; the synchronous sampling control module is used for controlling the voltage sampling and the discharging current sampling to be synchronous by adopting a synchronous signal; the acquisition module detects the monomer voltage and the battery pack charging and discharging current under the normal condition, acquires the discharging data acquired by the discharging module when the internal resistance of the storage battery is tested, wherein the discharging data comprises the discharging current, the discharging voltage and the temperature of the storage battery, and sends the discharging data to the data processing module; the data processing module is used for analyzing the discharge data, calculating the internal resistance of the storage battery, judging whether the voltage of the storage battery is undervoltage or not, whether the internal resistance is overrun or not and whether the temperature of the storage battery is overhigh or not, and obtaining the state information of the storage battery; the display module is used for displaying the state information of the storage battery.
Specifically, the discharging module is connected with the storage battery, and the discharging module discharges the storage battery, wherein the discharging current is within a preset range. The synchronous sampling control module is used for controlling voltage sampling and discharging current to be synchronous by adopting a synchronous signal, and the synchronous sampling control module and the acquisition module are provided with synchronous interfaces. The acquisition module is connected with the storage battery, and under normal conditions, the acquisition module acquires the monomer voltage and the charge-discharge current of the battery pack, and when the internal resistance test of the storage battery is carried out, the acquisition module acquires the discharge current, the discharge voltage and the temperature of the storage battery and sends the acquired data to the data processing module, and the data processing module carries out analysis calculation on the discharge data and calculates the internal resistance of the storage battery. In this embodiment, the load adopts the mode of power resistance with the fin, including 2 grades of loads, but 2 grades of loads fast switch over for discharge current is 10A and 20A, and the load is according to the quantity automatic adjustment of battery, adapts to the constant current requirement, avoids discharge current gap too big and arouse partial battery insufficient capacity. The synchronous sampling control module adopts a synchronous signal to control the resistance module to switch the load, controls voltage sampling and discharging current synchronous sampling, and improves the measurement precision. The acquisition module comprises a current sensor, a voltage sensor and a temperature sensor, the current sensor is used for acquiring discharge current, the voltage sensor is used for acquiring discharge voltage, the temperature sensor is used for acquiring the temperature of the storage battery, and the internal resistance of the storage battery can be calculated according to the acquired discharge voltage and discharge current. The data processing module also judges whether the voltage of the storage battery is under-voltage or not, whether the internal resistance is over-limit or not and whether the temperature of the storage battery is overhigh or not according to the collected discharge data to obtain the state information of the storage battery, and controls the display module to display the state information of the storage battery, so that a user can conveniently check the state information of the storage battery. The display module displays in various forms of graphs and curves, and is friendly in picture and convenient to view. The voltage and the internal resistance of the single battery and the battery pack can be compared in the whole group transversely through a histogram and a curve; the internal resistance of the single body and the internal resistance of the battery pack can be longitudinally compared by adopting a bar chart or a curve.
In this embodiment, the internal resistance flashing detection device of the storage battery further comprises an alarm module, and the alarm module is used for sending out an alarm signal when data abnormality exists in the state information of the storage battery. The data processing module judges the state information of the storage battery according to the discharge data, if the state information of the storage battery is abnormal, the data processing module sends a control signal to the alarm module, and the alarm module sends out alarm signals of low battery voltage, over-limit internal resistance and over-high battery temperature according to the received control signal to remind a user of the abnormality of the storage battery, so that the user can timely know the abnormal state condition of the storage battery.
In this embodiment, the discharging module in the internal resistance flash detection device of the storage battery comprises a discharging loop and a protection control submodule; the discharge loop is used for switching on a load to discharge; and the protection control submodule is used for automatically cutting off the discharge loop to protect the discharge module when the discharge overtime or the electronic switch is damaged. The discharge circuit can be automatically cut off by arranging the protection control submodule, and the discharge module is protected, so that the working reliability and safety of the discharge module are ensured, and the safety of the storage battery internal resistance flash detection device is improved.
In this embodiment, the data processing module in the internal resistance flash detection device of the storage battery comprises a discharge data analysis submodule and a comprehensive analysis submodule; the discharge data analysis submodule is used for analyzing and judging the discharge current, the discharge voltage and the storage battery temperature, calculating the internal resistance of the storage battery, and judging whether the voltage of the storage battery is undervoltage, whether the internal resistance is over-limit and whether the temperature of the storage battery is overhigh; and the comprehensive analysis submodule comprehensively analyzes the historical analysis data to obtain the state information of the storage battery and find out the laggard storage battery. The discharge data analysis submodule analyzes and judges the discharge data and stores the discharge data, and the discharge data are used as historical data, so that the comprehensive analysis submodule can conveniently perform comprehensive analysis. All state information of the storage battery is obtained through the comprehensive analysis of the comprehensive analysis submodule on the historical data, so that the backward storage battery is found out, and early warning can be carried out.
In this embodiment, the internal resistance flash detection device of the storage battery further comprises a communication module, and the communication module is used for transmitting the state information data of the storage battery to the external equipment. The communication module can adopt a wired communication module and also can adopt a wireless communication module. The wired communication module adopts RS232/485, and the wireless communication module can adopt an Ethernet or wireless network module.
The data processing module uses STM32F103RDT6 chip, STM32F103RDT6 chip uses high performance ARMCortex-M3 TM32 bit RISC core to operate at 72 MHz frequency, high speed embedded memory and enhanced I/O peripherals are connected to two APB buses, providing two 12 bit ADCs, three general purpose 16 bit timers plus one PWM timer, and standard and advanced communication interfaces: i is2C and SPI interface, three serial peripheral interfaces, a USB interface and a CAN interface. STM32F103RDT6 works on a power supply of 2V to 3.6V, and the working temperature range is-40 ℃ to +85 ℃. Data processing by using STM32F103RDT6 chipThe requirement of quick measurement is satisfied.
According to the internal resistance flash detection device for the storage battery, provided by the embodiment of the invention, the synchronous signal is adopted to control the voltage sampling and the discharge current to be synchronous, the measurement precision is improved, and the internal resistance of the storage battery is detected at high speed and high accuracy and reliability.
In the first embodiment, a device for measuring the internal resistance of the storage battery in a flashing manner is provided, and correspondingly, a method for measuring the internal resistance of the storage battery in a flashing manner is also provided. Fig. 2 is a flowchart illustrating a method for flash testing internal resistance of a battery according to a second embodiment of the present invention. Since the method embodiment is basically similar to the device embodiment, the description is simple, and the relevant points can be referred to the partial description of the device embodiment. The method embodiments described below are merely illustrative.
As shown in fig. 2, a flowchart of a method for internal resistance flashing of a storage battery according to a second embodiment of the present invention is shown, where the method is applied to the internal resistance flashing of the storage battery described in the first embodiment, and the method includes the following steps:
the discharging module discharges the storage battery;
the acquisition module acquires discharge data, the discharge data comprises discharge current, discharge voltage and storage battery temperature, and the discharge data is sent to the data processing module;
the data processing module analyzes the discharge data, calculates the internal resistance of the storage battery, and judges whether the voltage of the storage battery is undervoltage or not, whether the internal resistance is overrun or not and whether the temperature of the storage battery is overhigh or not to obtain the state information of the storage battery;
the display module displays the state information of the storage battery.
The method for testing the internal resistance of the storage battery provided by the embodiment of the invention further comprises the following steps: and when the data processing module finds that the data in the storage battery state information is abnormal, the data processing module controls the alarm module to send out an alarm signal. The data processing module judges the state information of the storage battery according to the discharge data, if the state information of the storage battery is abnormal, the data processing module sends a control signal to the alarm module, and the alarm module sends out alarm signals of low battery voltage, over-limit internal resistance and over-high battery temperature according to the received control signal to remind a user of the abnormality of the storage battery, so that the user can timely know the abnormal state condition of the storage battery.
The method for testing the internal resistance of the storage battery provided by the embodiment of the invention further comprises the following steps: when the acquisition module acquires that the discharge is overtime or the electronic switch is damaged, the data processing module controls the protection control submodule to automatically cut off the discharge loop. The discharge circuit can be automatically cut off by controlling the protection control submodule to protect the discharge module, so that the working reliability and safety of the discharge module are ensured, and the safety of the storage battery internal resistance flash detection device is improved.
The method for testing the internal resistance of the storage battery provided by the embodiment of the invention further comprises the following steps: and the comprehensive analysis submodule comprehensively analyzes the historical analysis data to obtain the state information of the storage battery and find out the laggard storage battery.
According to the method for detecting the internal resistance of the storage battery in the flash mode, the synchronous signal is adopted to control voltage sampling and discharging current to be synchronous, the measuring precision is improved, and the speed for detecting the internal resistance of the storage battery is high, and the accuracy and the reliability are high.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. The utility model provides a device is surveyed in interior resistance of battery sudden strain of a muscle which characterized in that includes: a discharge module, a synchronous sampling control module, an acquisition module, a data processing module and a display module,
the discharging module is used for discharging the storage battery;
the synchronous sampling control module is used for controlling the voltage sampling and the discharging current sampling to be synchronous by adopting a synchronous signal;
the acquisition module detects the monomer voltage and the battery pack charging and discharging current under the normal condition, and acquires the discharging data including the discharging current, the discharging voltage and the storage battery temperature from the discharging module during the battery internal resistance test, and sends the discharging data to the data processing module;
the data processing module is used for analyzing the discharge data, calculating the internal resistance of the storage battery, judging whether the voltage of the storage battery is undervoltage or not, whether the internal resistance is overrun or not and whether the temperature of the storage battery is overhigh or not, and obtaining the state information of the storage battery;
the display module is used for displaying the state information of the storage battery.
2. The device for detecting the internal resistance of the storage battery according to claim 1, further comprising an alarm module, wherein the alarm module is used for sending out an alarm signal when data abnormality exists in the state information of the storage battery.
3. The internal resistance flash detection device of the storage battery according to claim 1, wherein the discharge module comprises a discharge loop and a protection control sub-module;
the discharge loop is used for switching on a load to discharge;
and the protection control submodule is used for automatically cutting off the discharge loop to protect the discharge module when the discharge overtime or the electronic switch is damaged.
4. The internal resistance flash detection device of a storage battery according to claim 1, wherein the data processing module includes a discharge data analysis sub-module and a comprehensive analysis sub-module;
the discharge data analysis submodule is used for analyzing and judging the discharge current, the discharge voltage and the storage battery temperature, calculating the internal resistance of the storage battery, and judging whether the voltage of the storage battery is undervoltage, whether the internal resistance is over-limit and whether the temperature of the storage battery is overhigh;
and the comprehensive analysis submodule comprehensively analyzes the historical analysis data to obtain the state information of the storage battery and find out the laggard storage battery.
5. The device for detecting the internal resistance of the storage battery according to claim 4, further comprising a communication module for transmitting the state information data of the storage battery to an external device.
6. The device for detecting the internal resistance of the storage battery in a flashing manner as claimed in claim 5, wherein the data processing module adopts an STM32F103RDT6 chip.
7. A method for flash measurement of internal resistance of a battery, which is applied to the apparatus of any one of claims 1 to 6, the method comprising the steps of:
the discharging module discharges the storage battery;
the synchronous sampling control module controls voltage sampling and discharging current to be synchronous by adopting a synchronous signal;
the acquisition module acquires discharge data, the discharge data comprises discharge current, discharge voltage and storage battery temperature, and the discharge data is sent to the data processing module;
the data processing module analyzes the discharge data, calculates the internal resistance of the storage battery, and judges whether the voltage of the storage battery is undervoltage or not, whether the internal resistance is overrun or not and whether the temperature of the storage battery is overhigh or not to obtain the state information of the storage battery;
the display module displays the state information of the storage battery.
8. The method of claim 7, further comprising: and when the data processing module finds that the data in the storage battery state information is abnormal, the data processing module controls the alarm module to send out an alarm signal.
9. The method of claim 7, further comprising: when the acquisition module acquires that the discharge is overtime or the electronic switch is damaged, the data processing module controls the protection control submodule to automatically cut off the discharge loop.
10. The method of claim 7, further comprising: and the comprehensive analysis submodule comprehensively analyzes the historical analysis data to obtain the state information of the storage battery and find out the laggard storage battery.
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