CN-121989756-A - Method and system for self-adapting charging and discharging temperatures of lithium battery started and stopped by re-clamping

CN121989756ACN 121989756 ACN121989756 ACN 121989756ACN-121989756-A

Abstract

The invention relates to the technical field of lithium battery charging and discharging, and discloses a method and a system for self-adapting charging and discharging temperatures of a re-card start-stop lithium battery, wherein the method comprises the steps of collecting an operation parameter set of the re-card start-stop lithium battery and carrying out large-current start-stop condition identification to obtain a start-discharge condition identifier and an idle speed charging condition identifier; the method comprises the steps of constructing a temperature pulse model of a discharge channel and a temperature drift model of a charging channel, inputting instantaneous current data into the temperature pulse model for filtering treatment to obtain temperature pulse characteristic parameters, inputting idle charging current data into the temperature drift model for integrating and accumulating treatment to obtain temperature drift characteristic parameters, and carrying out start-stop frequency fusion based on the temperature pulse characteristic parameters and the temperature drift characteristic parameters to generate a charge-discharge self-adaptive control instruction.

Inventors

TANG LUOWEI
LIU HAOYU
CAO DEDING
ZHONG TAO
WU ZHIJUN
FAN XIAOYANG
WEI GUANGSHENG

Assignees

深圳市钜力能科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260326

Claims (10)

1. The method for self-adapting the charge and discharge temperature of the lithium battery started and stopped by the re-card is characterized by comprising the following steps: collecting an operation parameter set of a re-card start-stop lithium battery, and carrying out heavy current start-stop condition identification to obtain a start-up discharge condition identifier and an idle speed charging condition identifier; carrying out asymmetric double-channel separation on temperature signals in the operation parameter set according to the starting discharging working condition identifier and the idle speed charging working condition identifier, and constructing a temperature pulse model of a discharging channel and a temperature drift model of a charging channel; Inputting the instantaneous current data in the operation parameter set into the temperature pulse model for filtering treatment to obtain a temperature pulse characteristic parameter; inputting the idle speed charging current data in the operation parameter set into the temperature drift model for integral accumulation processing to obtain a temperature drift characteristic parameter; and carrying out start-stop frequency fusion based on the temperature pulse characteristic parameter and the temperature drift characteristic parameter to generate a charge-discharge self-adaptive control instruction.
2. The method for adapting the charge and discharge temperature of a lithium battery with a re-truck start-stop function according to claim 1, wherein the steps of collecting the operation parameter set of the lithium battery with the re-truck start-stop function and performing heavy current start-stop condition identification to obtain a start-discharge condition identifier and an idle speed charge condition identifier include: synchronously acquiring instantaneous current data, idle charging current data, historical start-stop data and temperature signals of the re-clamped start-stop lithium battery to obtain an operation parameter set; Performing differential calculation on the instantaneous current data in the operation parameter set to obtain current change rate data and corresponding current duration data; Based on the condition that the current change rate data exceeds a preset change rate threshold value and the current duration time data is smaller than a first duration time, judging a starting mode of the operation parameter set to obtain a starting discharge working condition identifier; And based on the condition that the instantaneous current data is stable in a preset current interval and the current duration time data is longer than a second duration time, judging the charging mode of the operation parameter set to obtain an idle speed charging working condition identifier.
3. The method for adapting the charge-discharge temperature of the re-truck start-stop lithium battery according to claim 2, wherein the asymmetric dual-channel separation is performed on the temperature signal in the operation parameter set according to the start-discharge condition identifier and the idle charging condition identifier, and a temperature pulse model of a discharge channel and a temperature drift model of a charging channel are constructed, and the method comprises the following steps: performing start-up phase time sequence extraction on the temperature signals in the operation parameter set according to the start-up discharge working condition identification to obtain temperature pulse waveform data of a start-up phase; performing start-stop frequency self-adaptive Fourier transform modeling based on the temperature pulse waveform data to obtain a temperature pulse model of the discharge channel; according to the idle speed charging condition identifier, performing idle speed stage time sequence extraction on the temperature signals in the operation parameter set to obtain temperature drift waveform data in an idle speed stage; And carrying out time integral modeling based on the temperature drift waveform data to obtain a temperature drift model of the charging channel.
4. The method for adapting the charge and discharge temperature of a re-truck start-stop lithium battery according to claim 3, wherein the step of inputting the instantaneous current data in the operation parameter set into the temperature pulse model for filtering processing to obtain the temperature pulse characteristic parameters comprises the following steps: inputting the instantaneous current data in the operation parameter set into a current slope compensation function in the temperature pulse model to calculate so as to obtain a current slope signal; Performing parameter adjustment on a first adaptive filter in the temperature pulse model based on the current slope signal to obtain a filter configuration parameter, and updating the first adaptive filter based on the filter configuration parameter to obtain a second adaptive filter; Inputting the temperature pulse waveform data in the starting stage into the second adaptive filter to inhibit electromagnetic noise, so as to obtain a pure temperature pulse signal; And performing feature recognition based on start-stop mode matching on the pure temperature pulse signal to obtain temperature jump amplitude data, and calculating a temperature pulse feature parameter comprising temperature pulse response time and a pulse peak value according to the temperature jump amplitude data.
5. The method for adapting the charge-discharge temperature of a re-truck start-stop lithium battery according to claim 4, wherein the performing parameter adjustment on a first adaptive filter in the temperature pulse model based on the current slope signal to obtain a filter configuration parameter, and updating the first adaptive filter based on the filter configuration parameter to obtain a second adaptive filter comprises: If the current slope signal exceeds the preset amplitude characteristic, calculating a dynamic compensation coefficient containing a logarithmic function compensation term; Performing adaptive adjustment on the filter order of the first adaptive filter according to the historical start-stop data in the operation parameter set to obtain a filter order parameter matched with the start-stop frequency; inputting the dynamic compensation coefficient and the filter order parameter into a genetic factor algorithm to perform multi-objective optimization to obtain a candidate filter parameter set, performing fitness evaluation on the candidate filter parameter set, and solving to obtain a filter configuration parameter; and carrying out parameter replacement on the weight matrix and the transfer function of the first adaptive filter based on the filter configuration parameters to obtain a second adaptive filter.
6. The method for adapting the charge-discharge temperature of a lithium battery with a re-truck start-stop function according to claim 4, wherein the performing feature recognition based on start-stop pattern matching on the pure temperature pulse signal to obtain temperature jump amplitude data, and calculating a temperature pulse feature parameter including a temperature pulse response time and a pulse peak value according to the temperature jump amplitude data comprises: constructing a start-stop mode template library containing temperature pulse modes under different start-stop frequencies based on historical start-stop data; Inputting the pure temperature pulse signals into a Bayesian estimator and carrying out probability matching by combining the start-stop mode template library to obtain probability distribution data; Performing jump amplitude detection based on the probability distribution data and the cyclic duty cycle self-adaptive threshold value to obtain temperature jump amplitude data; and extracting pulse waveform characteristics according to the temperature jump amplitude data to obtain temperature pulse characteristic parameters comprising temperature pulse response time and pulse peak values.
7. The method for adapting the charge and discharge temperatures of the re-truck start-stop lithium battery according to claim 1, wherein the step of inputting the idle charging current data in the operation parameter set into the temperature drift model to perform integral accumulation processing to obtain the temperature drift characteristic parameter comprises the following steps: inputting idle speed charging current data in the operation parameter set into a time integral function of the temperature drift model to perform continuous integral calculation to obtain a first temperature drift integral value; Historical data influence reduction processing is carried out on the basis of the first temperature drift integral value and an exponential decay weight function, so that a second temperature drift integral value is obtained; combining the second temperature drift integral value, and carrying out drift error prediction and compensation on the current stability characteristics of the idle speed charging current data to obtain a third temperature drift integral value; And carrying out temperature memory correction according to the historical start-stop data in the operation parameter set and the third temperature drift integral value to obtain a temperature drift characteristic parameter.
8. The method for adapting the charge and discharge temperatures of the re-truck start-stop lithium battery according to claim 7, wherein the performing temperature memory correction according to the historical start-stop data in the operation parameter set and the third temperature drift integral value to obtain the temperature drift characteristic parameter comprises: Constructing a temperature memory matrix containing temperature drift change rules under different start-stop frequencies based on historical start-stop data in the operation parameter set; Performing similarity matching on the current start-up and shutdown condition characteristics and the temperature memory matrix to obtain similarity weight data, and performing weighted summation on the historical temperature data corresponding to the temperature memory matrix based on the similarity weight data to obtain a temperature memory correction coefficient; and carrying out memory correction on the third temperature drift integral value according to the temperature memory correction coefficient to obtain a temperature drift characteristic parameter.
9. The method for adaptively controlling the charge and discharge temperatures of the re-truck start-stop lithium battery according to claim 1, wherein the generating the charge and discharge adaptive control command based on the start-stop frequency fusion of the temperature pulse characteristic parameter and the temperature drift characteristic parameter comprises: Carrying out dynamic weight distribution on the temperature pulse characteristic parameters and the temperature drift characteristic parameters according to the current start-stop working condition mode to obtain dual-channel fusion temperature characteristic data; Performing temperature compensation gain calculation based on the instantaneous current data, the idle charging current data and the historical start-stop data in the operation parameter set to obtain a temperature compensation gain coefficient; Performing start-stop sequence prediction based on the dual-channel fusion temperature characteristic data to obtain a start probability prediction value, and performing feedforward temperature compensation based on the start probability prediction value and the temperature compensation gain coefficient to obtain feedforward temperature compensation quantity; performing recursive least square method parameter updating on the deviation between the feedforward temperature compensation quantity and the target temperature value to obtain a Kalman gain matrix, and performing self-adaptive adjustment processing on an initial control parameter based on the Kalman gain matrix to obtain an updated control parameter; And generating a charge-discharge self-adaptive control instruction according to the updated control parameter and the feedforward temperature compensation quantity.
10. A re-truck start-stop lithium battery charge-discharge temperature adaptive system for executing the re-truck start-stop lithium battery charge-discharge temperature adaptive method according to any one of claims 1-9, the re-truck start-stop lithium battery charge-discharge temperature adaptive system comprising: the acquisition module is used for acquiring an operation parameter set of the lithium battery which is started and stopped by the re-card and identifying the heavy current startup and shutdown conditions to obtain a startup discharging condition identifier and an idle speed charging condition identifier; The dual-channel separation module is used for carrying out asymmetric dual-channel separation on the temperature signals in the operation parameter set according to the starting discharging working condition identifier and the idle speed charging working condition identifier, and constructing a temperature pulse model of a discharging channel and a temperature drift model of a charging channel; the filtering processing module is used for inputting the instantaneous current data in the operation parameter set into the temperature pulse model for filtering processing to obtain temperature pulse characteristic parameters; The integral accumulation processing module is used for inputting the idle speed charging current data in the operation parameter set into the temperature drift model for integral accumulation processing to obtain a temperature drift characteristic parameter; and the generation module is used for carrying out start-stop frequency fusion based on the temperature pulse characteristic parameters and the temperature drift characteristic parameters and generating a charge-discharge self-adaptive control instruction.

Description

Method and system for self-adapting charging and discharging temperatures of lithium battery started and stopped by re-clamping Technical Field The invention relates to the technical field of lithium battery charging and discharging, in particular to a method and a system for self-adapting to the charging and discharging temperature of a re-clamping start-stop lithium battery. Background The instant large current of 800-1200A is needed when the heavy truck is started, the continuous small current of 50-100A is needed when the idle speed is charged, and the temperature response mechanisms under two working conditions are basically different, but the prior art lacks a targeted differential control means. The temperature pulse signal at the starting moment in the starting and stopping process of the re-truck is extremely weak, the temperature rise rate is only 0.1-0.5 ℃ per second, the temperature rise rate is easily completely covered by strong electromagnetic noise generated by 1000A-level starting current, the real temperature change at the starting moment cannot be accurately captured, the temperature drift signal at the idling charging process is slowly changed and is only 0.01-0.05 ℃ per minute, systematic errors are easily generated in the long-time accumulation process, and the temperature trend prediction is invalid. Disclosure of Invention The invention provides a method and a system for self-adapting the charge and discharge temperatures of a re-card start-stop lithium battery, which effectively inhibit long-time accumulated errors, ensure the accuracy of temperature drift prediction and ensure the high precision and long-term stability of the temperature control of the re-card start-stop lithium battery. In a first aspect, the invention provides a method for adapting the charge and discharge temperature of a re-card start-stop lithium battery, which comprises the following steps: collecting an operation parameter set of a re-card start-stop lithium battery, and carrying out heavy current start-stop condition identification to obtain a start-up discharge condition identifier and an idle speed charging condition identifier; carrying out asymmetric double-channel separation on temperature signals in the operation parameter set according to the starting discharging working condition identifier and the idle speed charging working condition identifier, and constructing a temperature pulse model of a discharging channel and a temperature drift model of a charging channel; Inputting the instantaneous current data in the operation parameter set into the temperature pulse model for filtering treatment to obtain a temperature pulse characteristic parameter; inputting the idle speed charging current data in the operation parameter set into the temperature drift model for integral accumulation processing to obtain a temperature drift characteristic parameter; and carrying out start-stop frequency fusion based on the temperature pulse characteristic parameter and the temperature drift characteristic parameter to generate a charge-discharge self-adaptive control instruction. With reference to the first aspect, in a first implementation manner of the first aspect of the present invention, the collecting the operation parameter set of the re-truck start-stop lithium battery and performing the heavy current start-stop condition identification to obtain a start-discharge condition identifier and an idle speed charging condition identifier includes: synchronously acquiring instantaneous current data, idle charging current data, historical start-stop data and temperature signals of the re-clamped start-stop lithium battery to obtain an operation parameter set; Performing differential calculation on the instantaneous current data in the operation parameter set to obtain current change rate data and corresponding current duration data; Based on the condition that the current change rate data exceeds a preset change rate threshold value and the current duration time data is smaller than a first duration time, judging a starting mode of the operation parameter set to obtain a starting discharge working condition identifier; And based on the condition that the instantaneous current data is stable in a preset current interval and the current duration time data is longer than a second duration time, judging the charging mode of the operation parameter set to obtain an idle speed charging working condition identifier. With reference to the first aspect, in a second implementation manner of the first aspect of the present invention, the performing asymmetric dual-channel separation on the temperature signal in the operating parameter set according to the start discharge working condition identifier and the idle charging working condition identifier, and constructing a temperature pulse model of a discharge channel and a temperature drift model of a charging channel, includes: performing start-up phase time sequence extraction o