CN-114609533-B - Storage battery energy storage performance detection method and system

Abstract

The application relates to a method and a system for detecting energy storage performance of a storage battery, wherein the method comprises the step of detecting the energy storage performance, the step of detecting the energy storage performance comprises the steps of obtaining an initial voltage value of the storage battery and obtaining a rated full-load voltage of the storage battery based on the initial voltage value, obtaining a preset number of voltage values of the storage battery after the storage battery is discharged and a first time period passes, setting the voltage value with the lowest value as a voltage value to be detected, obtaining a voltage difference value based on the initial voltage value and the voltage value to be detected, obtaining a judging voltage difference value based on the rated full-load voltage, judging whether the voltage difference value is larger than the judging voltage difference value, obtaining a relative difference value of the voltage difference value and the judging voltage difference value if the voltage difference value is larger than the first deviation value, and sending first prompt information to an intelligent terminal bound with the storage battery if the relative difference value is larger than the first deviation value. The application has the effect of being convenient for knowing the condition of the storage battery pack in time.

Inventors

• CHEN SHENGQI

Assignees

• 深圳市必特牛科技有限公司

Dates

Publication Date

20260508

Application Date

20220309

Claims (6)

1. 1. The storage battery pack detection method is characterized by comprising an energy storage performance detection step, wherein the energy storage performance detection step comprises the following steps of: Acquiring an initial voltage value of a storage battery pack and obtaining rated full-load voltage of the storage battery pack based on the initial voltage value; after the storage battery pack is discharged and a first period of time passes, obtaining a preset number of voltage values of the storage battery pack; Setting the voltage value with the lowest value as the voltage value to be detected; based on the voltage difference between the initial voltage value and the voltage value to be detected; obtaining a judgment pressure difference value based on the rated full-load voltage; Judging whether the voltage difference is larger than the judgment pressure difference value, if so, obtaining the relative difference value between the voltage difference value and the judgment pressure difference value, and Judging whether the relative difference value is larger than a first deviation value or not, if so, sending first prompt information to an intelligent terminal bound with the storage battery pack, wherein the first prompt information is used for prompting a user that the storage battery pack has the energy storage performance reduced condition; The detection method further comprises a charging temperature monitoring step, wherein the charging temperature monitoring step comprises the following steps: under the condition that the plug is connected with a socket of the battery car and the battery pack is charged, acquiring an initial temperature of the plug, and acquiring a temperature warning value based on the initial temperature, wherein the temperature warning value is obtained by adding a fixed value to the initial temperature value, the fixed value is determined based on the performance reduction condition of the battery pack and the rated full-load voltage of the battery pack, which are obtained in the energy storage performance detection step, and when the energy storage performance of the battery pack is reduced, the fixed value is increased; after a second time interval, obtaining the current temperature value of the plug and Judging whether the current temperature value is larger than the temperature warning value or not; If the current temperature value is greater than the temperature warning value, the charging of the storage battery pack is interrupted, and after a second time period, the current temperature value of the plug is obtained again, and whether the current temperature value is greater than the temperature warning value is judged again; If the temperature value is not greater than the preset temperature value, continuously charging the storage battery pack, and re-acquiring the current temperature value of the plug after a second time interval, and re-judging the magnitude relation between the temperature value and the temperature warning value; After determining that the current temperature value is not greater than the temperature alert value, further comprising: based on the current temperature value and the initial temperature value, a temperature difference value between the two values is obtained; judging whether the temperature difference is larger than a preset difference or not, if so, reducing the current value for charging the storage battery pack; The detection method further comprises a curve matching step, wherein the curve matching step comprises the following steps: acquiring type information of the storage battery pack before charging the storage battery pack; The ideal current curve and the ideal voltage curve of the storage battery pack are obtained based on the type information, wherein the charging process of the storage battery pack comprises three processes of constant current, constant voltage and trickle, and the ideal charging curves of different types of storage battery packs are different; In the process of charging the storage battery pack, acquiring a charging current value of charging the storage battery pack and a charging voltage value of two ends of the storage battery pack in real time; Constructing an actual current curve based on the obtained charging current value, and constructing an actual voltage curve based on the obtained charging voltage value; obtaining the current phase difference of the actual current curve and the ideal current curve based on the actual current curve and the ideal current curve, and obtaining the voltage phase difference of the actual voltage curve and the ideal voltage curve based on the actual voltage curve and the ideal voltage curve; And when the voltage phase difference degree is larger than a preset first phase difference degree and/or the current phase difference degree is larger than a preset second phase difference degree, sending second prompt information to an intelligent terminal bound with the storage battery pack.
2. 2. The method for detecting the storage battery pack according to claim 1, wherein the intelligent terminal bound with the storage battery pack is code scanning bound by a user through the intelligent terminal.
3. 3. The method for detecting a storage battery pack according to claim 1, further comprising the step of sending data generated and called in at least one of an energy storage performance detection step, a charging temperature monitoring step and a curve matching step to an intelligent terminal bound with the storage battery pack in real time.
4. 4. The method according to claim 1, further comprising comparing the current voltage difference with a voltage difference in historical data; if the current voltage difference value is greater than a preset second difference value, pushing third prompt information to an intelligent terminal bound with the storage battery.
5. 5. The method for detecting a battery pack according to claim 1, wherein: the voltage value of the storage battery pack is realized through a detection circuit on the charging pile, and the detection circuit comprises: MCU; The voltage acquisition module (1) is used for detecting the voltages at two ends of the storage battery pack and sending the detected voltage values to the MCU; a capacitor charge-discharge module (2) for storing the electric energy output by the storage battery pack, and The first switch module (3) is communicated with the MCU, and the MCU controls the on-off of the first switch module (3) so as to control the capacitor charging and discharging module (2) to charge.
6. 6. A battery pack detection system for performing a battery pack detection method according to any one of claims 1 to 5, comprising: the first acquisition module (7) is used for acquiring an initial voltage value of the storage battery pack and obtaining a rated full-load voltage of the storage battery pack based on the initial voltage value; the second acquisition module (8) is used for acquiring the voltage values of the preset number of the storage battery pack after the storage battery pack is discharged and the first duration is passed; the voltage value setting module (9) is used for setting the voltage value with the lowest numerical value as the voltage value to be detected; A difference value acquisition module (10) for acquiring a voltage difference value between the initial voltage value and the voltage value to be detected based on the initial voltage value and the voltage value to be detected; a determination differential pressure value acquisition module (11) for obtaining a determination differential pressure value based on the rated full-load voltage; A first judgment module (12) for judging whether the voltage difference is greater than the judgment voltage difference; the relative difference value acquisition module (13) is used for acquiring the relative difference value between the voltage difference value and the judging pressure difference value when the voltage difference value is larger than the judging pressure difference value; A second judging module (14) for judging whether the relative difference is larger than the first deviation value, and The first prompt information sending module (15) is used for sending first prompt information to an intelligent terminal bound with the storage battery pack when the relative difference value is larger than a first deviation value, wherein the first prompt information is used for prompting a user that the storage battery pack has the energy storage performance reduced condition; Still include the temperature monitoring module that charges, the temperature monitoring module that charges is configured to: under the condition that the plug is connected with a socket of the battery car and the battery pack is charged, acquiring an initial temperature of the plug, and acquiring a temperature warning value based on the initial temperature, wherein the temperature warning value is obtained by adding a fixed value to the initial temperature value, the fixed value is determined based on the performance reduction condition of the battery pack and the rated full-load voltage of the battery pack, which are obtained in the energy storage performance detection step, and when the energy storage performance of the battery pack is reduced, the fixed value is increased; after a second time interval, obtaining the current temperature value of the plug and Judging whether the current temperature value is larger than the temperature warning value or not; If the current temperature value is greater than the temperature warning value, the charging of the storage battery pack is interrupted, and after a second time period, the current temperature value of the plug is obtained again, and whether the current temperature value is greater than the temperature warning value is judged again; If the temperature value is not greater than the preset temperature value, continuously charging the storage battery pack, and re-acquiring the current temperature value of the plug after a second time interval, and re-judging the magnitude relation between the temperature value and the temperature warning value; After determining that the current temperature value is not greater than the temperature alert value, further comprising: based on the current temperature value and the initial temperature value, a temperature difference value between the two values is obtained; judging whether the temperature difference is larger than a preset difference or not, if so, reducing the current value for charging the storage battery pack; Further included is a curve matching module configured to: acquiring type information of the storage battery pack before charging the storage battery pack; The ideal current curve and the ideal voltage curve of the storage battery pack are obtained based on the type information, wherein the charging process of the storage battery pack comprises three processes of constant current, constant voltage and trickle, and the ideal charging curves of different types of storage battery packs are different; In the process of charging the storage battery pack, acquiring a charging current value of charging the storage battery pack and a charging voltage value of two ends of the storage battery pack in real time; Constructing an actual current curve based on the obtained charging current value, and constructing an actual voltage curve based on the obtained charging voltage value; obtaining the current phase difference of the actual current curve and the ideal current curve based on the actual current curve and the ideal current curve, and obtaining the voltage phase difference of the actual voltage curve and the ideal voltage curve based on the actual voltage curve and the ideal voltage curve; And when the voltage phase difference degree is larger than a preset first phase difference degree and/or the current phase difference degree is larger than a preset second phase difference degree, sending second prompt information to an intelligent terminal bound with the storage battery pack.

Description

Storage battery energy storage performance detection method and system Technical Field The application relates to the technical field of charging equipment, in particular to a method and a system for detecting energy storage performance of a storage battery. Background An electric vehicle is a vehicle powered by a battery pack. In recent years, battery cars have gained very wide popularity in China. Because the storage battery car is powered by the storage battery pack, the storage battery pack needs to be charged after the storage battery car is used for a period of time. In order to facilitate people to charge the battery car, the charging pile is also widely popularized. The function of the charging pile is similar to that of an oiling machine in a gas station, the charging pile can be fixed on the ground or a wall, the charging pile is installed in a parking lot or a charging station of a public building and a residential community, and the charging pile is provided with a plug which is used for being connected with a socket of a battery car. In view of the above-mentioned related art, the inventors have found that when the performance of the battery pack of the electric vehicle is lowered, the charging effect of the battery pack of the electric vehicle is liable to be poor. Disclosure of Invention In order to facilitate timely understanding of the condition of the storage battery, the application provides a storage battery energy storage performance detection method and system. In a first aspect, the method for detecting the energy storage performance of the storage battery pack provided by the application adopts the following technical scheme. The method for detecting the energy storage performance of the storage battery comprises the step of detecting the energy storage performance, wherein the step of detecting the energy storage performance comprises the following steps: Acquiring an initial voltage value of a storage battery pack and obtaining rated full-load voltage of the storage battery pack based on the initial voltage value; after the storage battery pack is discharged and a first period of time passes, obtaining a preset number of voltage values of the storage battery pack; Setting the voltage value with the lowest value as the voltage value to be detected; based on the voltage difference between the initial voltage value and the voltage value to be detected; obtaining a judgment pressure difference value based on the rated full-load voltage; Judging whether the voltage difference is larger than the judgment pressure difference value, if so, obtaining the relative difference value between the voltage difference value and the judgment pressure difference value, and And if the relative difference value is larger than the first deviation value, sending first prompt information to an intelligent terminal bound with the storage battery pack. By adopting the technical scheme, after the connector is connected with the socket of the storage battery, the cloud terminal acquires the initial voltage value of the storage battery, the cloud terminal is based on the rated full-load voltage of the storage battery, the number of storage batteries in the storage battery can be determined through the rated full-load voltage, the cloud terminal can further determine the voltage drop of the normal storage battery for supplying power in a first period of time, the voltage drop is recorded as a judgment pressure difference value, the cloud terminal compares the actual voltage drop of the storage battery with the judgment pressure difference value, and when the actual voltage drop of the storage battery is larger than the judgment pressure difference value and the relative difference value of the voltage drop and the judgment pressure difference value is larger than the first deviation value, the phenomenon that the energy storage performance of the storage battery is reduced is indicated, and at the moment, the cloud terminal sends first prompt information to an intelligent terminal bound with the storage battery. And then remind the user, the user of being convenient for knows the situation of storage battery in time. Optionally, the intelligent terminal bound with the storage battery pack is bound by a user through the intelligent terminal by scanning codes. By adopting the technical scheme, the user can sweep the code through the intelligent terminal, the two-dimension code is bound in identity, and further the binding of the user identity and the storage battery pack is realized, the cloud can acquire the historical data of the user no matter which charging pile is used by the user, and all data in the using process can be stored and pushed to the intelligent terminal of the user. Optionally, the detection method further includes a charging temperature monitoring step, and the charging temperature monitoring step includes: Under the condition that the plug is connected with a socket of the battery car and the