Storage battery pack monitoring and pre-judging system

Abstract

The invention relates to the technical field of battery pack monitoring, in particular to a storage battery pack monitoring and pre-judging system. According to the storage battery pack monitoring and pre-judging system provided by the invention, the technical problem that a monitoring method of a storage battery pack monitoring system in the prior art is unreasonable is solved. A storage battery pack monitoring and pre-judging system comprises a data acquisition module, a data processing module and a data output module. The current working data of the storage battery pack is acquired through the acquisition module, the data processing module compares the current working data with the working state reference data interval, and when the current working data is in the working state reference data interval, the working state of the storage battery pack is normal; and the data acquisition module continues to acquire the current working data of the storage battery pack. And when the current working data is not in the working state reference data interval, the working state of the storage battery pack is abnormal, and the data processing module outputs alarm data through the data output module.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pack monitoring, and in particular to a battery pack monitoring and prejudgment system. Background Art

[0002] During the actual use of the battery pack, it is necessary to monitor the working status of the battery pack to determine whether the battery pack is working in a normal working state to prevent safety accidents.

[0003] However, the prior art can only monitor the working state of the battery pack, and the abnormality of the battery pack can only be known after the battery pack fails, and the performance of the battery pack cannot be predicted according to the working state of the battery, which has certain safety hazards. That is, the monitoring method of the battery pack monitoring system in the prior art is unreasonable and easily causes safety accidents.

[0004] Therefore, the battery pack monitoring system in the prior art has the technical problem of unreasonable monitoring method. Summary of the invention

[0005] The present invention provides a battery pack monitoring and prejudgment system, which solves the technical problem of unreasonable monitoring methods of battery pack monitoring systems in the prior art.

[0006] Some implementation plans adopted to solve the above technical problems include: A battery pack monitoring and prediction system comprises a data acquisition module, a data processing module and a data output module, wherein the data acquisition module and the data output module both communicate with the data processing module; The data acquisition module collects data on temperature, voltage, current, and charge and discharge times of the battery pack; Wherein, the data acquisition module collects the current charge and discharge times of the battery pack; The data processing module determines the attenuation degree of the battery pack according to the current charge and discharge times of the battery pack; The data processing module determines a reference data interval of the working state of the battery pack according to the attenuation degree of the battery pack, wherein the reference data interval of the working state includes a working temperature interval, an output voltage interval, and an output current interval; The data acquisition module acquires current working data of the battery pack, wherein the current working data includes the current temperature of the battery pack, the current output voltage of the battery pack, and the current output current of the battery pack; The data processing module determines whether the current working data is within the working status reference data interval. When the current working data is within the working status reference data interval, the data acquisition module continues to acquire the current working data of the battery pack; when the current working data is not within the working status reference data interval, the data processing module outputs alarm data through the data output module.

[0007] Preferably, the working status reference data interval is obtained by the following steps: Determine the test temperature range according to the designed use temperature range of the battery pack, wherein the use temperature range is the ambient temperature range where the battery pack is located; Determine the test data collection node according to the test temperature range; Collecting the working status test data interval according to the test data collection node; The working status test data and the test data acquisition node are associated to obtain the working status reference data interval.

[0008] Preferably, in determining the test data collection nodes according to the temperature range, the test data collection nodes include a plurality of test data collection nodes, and the temperature difference between each test data collection node and an adjacent test data collection node does not exceed 0.5°C.

[0009] Preferably, the temperature parameters collected by the data collection module include the temperature parameters of the battery pack itself and the ambient temperature of the battery pack.

[0010] Preferably, the data processing module determines the attenuation degree of the battery pack according to the current charge and discharge times of the battery pack, and the attenuation degree of the battery pack is determined according to experiments.

[0011] Preferably, the attenuation degree of the battery pack is determined according to the following steps: Recording the number of times the battery pack is charged and discharged; Associating the output voltage and output current of the battery pack with the number of charge and discharge times each time; The attenuation curve of the battery pack is fitted through the output voltage, output current and charge and discharge times of the battery pack each time, and the attenuation degree is determined according to the attenuation curve.

[0012] Preferably, the battery pack includes at least two batteries, and the data acquisition module independently collects current working data of each battery.

[0013] Preferably, each battery of the battery pack has an independent serial number, and the alarm data output by the data output module includes the serial number of the battery.

[0014] Preferably, the data output module outputs the alarm data via wired communication.

[0015] Preferably, the data output module outputs the alarm data via wireless communication.

[0016] Compared with the prior art, the present invention has the following advantages: The present invention collects the current working data of the battery pack through the collection module, and the data processing module compares the current working data with the working state reference data interval. When the current working data is within the working state reference data interval, it indicates that the working state of the battery pack is normal, and the data collection module continues to collect the current working data of the battery pack. When the current working data is not within the working state reference data interval, it indicates that the working state of the battery pack is abnormal. At this time, the data processing module outputs alarm data through the data output module. When any working data of the battery pack is abnormal, the data output module can issue alarm data, so that the safety hazards of the battery pack can be discovered in time, ensuring that the battery pack works under the working state that meets the requirements, and improving the safety performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] For the purpose of explanation, several embodiments of the present invention technology are described in the following drawings. The following drawings are incorporated into this text and constitute a part of the specific embodiment. In some cases, well-known structures and components are shown in block diagram form to avoid obscuring the concept of the present invention subject technology.

[0018] Figure 1 It is the work flow chart of the present invention. DETAILED DESCRIPTION

[0019] The specific embodiments shown below are intended to be descriptions of various configurations of the subject technology of the present invention, and are not intended to represent the only configuration that the subject technology of the present invention can be put into practice. The specific embodiments include specific details intended to provide a thorough understanding of the subject technology of the present invention. However, it will be clear and obvious to those skilled in the art that the subject technology of the present invention is not limited to the specific details shown herein, and can be put into practice without these specific details.

[0020] It can be understood that, in this document, relational terms such as “first” and “second” are intended to distinguish one entity or operation from another entity or operation, and are not intended to express or imply any actual relationship or order between these entities or operations.

[0021] The terms "comprises," "comprising," or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0022] Reference Figure 1 As shown, a battery pack monitoring and prediction system includes a data acquisition module, a data processing module and a data output module, wherein the data acquisition module and the data output module both communicate with the data processing module; The data acquisition module collects data on temperature, voltage, current, and charge and discharge times of the battery pack; Reference Figure 1 As shown, the data acquisition module collects the current charge and discharge times of the battery pack; The data processing module determines the attenuation degree of the battery pack according to the current charge and discharge times of the battery pack; The data processing module determines a reference data interval of the working state of the battery pack according to the attenuation degree of the battery pack, wherein the reference data interval of the working state includes a working temperature interval, an output voltage interval, and an output current interval; The data acquisition module acquires current working data of the battery pack, wherein the current working data includes the current temperature of the battery pack, the current output voltage of the battery pack, and the current output current of the battery pack; The data processing module determines whether the current working data is within the working status reference data interval. When the current working data is within the working status reference data interval, the data acquisition module continues to acquire the current working data of the battery pack; when the current working data is not within the working status reference data interval, the data processing module outputs alarm data through the data output module.

[0023] In some embodiments, in order to facilitate understanding of the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with a specific workflow: Before the battery pack is put into use, the working status reference data interval of the battery pack should be determined first, that is, the working status reference data interval should at least include the following data: the attenuation degree of the battery pack. The attenuation degree refers to the performance decline of the battery pack after each charge and discharge cycle. It usually includes the capacity of the battery pack, the output voltage of the battery pack, the output current of the battery pack, and the charge and discharge temperature of the battery pack. The data can be obtained according to specific experiments.

[0024] In addition, the working environment temperature of the battery pack also has an impact on the performance of the battery pack. Therefore, the working environment temperature of the battery pack should also be taken as a test factor.

[0025] That is, the working state reference data interval refers to various working data of the battery pack when it is working normally under a certain working environment temperature of the battery pack and the current attenuation degree of the battery pack, which may include temperature, output current, output voltage, etc. It may also include charging and discharging temperature, etc.

[0026] Then, during the actual operation of the battery pack, the data acquisition module collects the current working data of the battery, which includes the current attenuation degree of the battery pack, the current operating temperature of the battery pack, the current working environment temperature of the battery pack, the current output current of the battery pack, the current output voltage of the battery pack, etc.

[0027] By comparing the current working data with the working status reference data range, it can be determined whether the performance of the battery pack meets the requirements. If any parameter does not meet the requirements, alarm data will be output.

[0028] This monitoring and prediction method can ensure that alarm data is issued when any slight abnormality of the battery pack occurs, which is beneficial to the troubleshooting and maintenance of the battery pack and reduces the safety hazards of the battery pack during use.

[0029] In some embodiments, the working status reference data interval is obtained by the following steps: Determine the test temperature range according to the designed use temperature range of the battery pack, wherein the use temperature range is the ambient temperature range where the battery pack is located; Determine the test data collection node according to the test temperature range; Collecting the working status test data interval according to the test data collection node; The working status test data and the test data acquisition node are associated to obtain the working status reference data interval.

[0030] In the step of determining the test data collection node according to the temperature range, the test data collection nodes include a plurality of test data collection nodes, and the temperature difference between each test data collection node and an adjacent test data collection node does not exceed 0.5°C.

[0031] The more data collection nodes there are, the more accurate the working state reference data interval is. Of course, the working state reference data interval can also be made continuous by using a curve fitting method.

[0032] In some embodiments, the temperature parameters collected by the data collection module include the temperature parameters of the battery pack itself and the ambient temperature of the battery pack.

[0033] The data processing module determines the attenuation degree of the battery pack according to the current charge and discharge times of the battery pack, and the attenuation degree of the battery pack is determined according to experiments.

[0034] The attenuation degree of the battery pack is determined according to the following steps: Recording the number of times the battery pack is charged and discharged; Associating the output voltage and output current of the battery pack with the number of charge and discharge times each time; The attenuation curve of the battery pack is fitted through the output voltage, output current and charge and discharge times of the battery pack each time, and the attenuation degree is determined according to the attenuation curve.

[0035] In some embodiments, the battery pack includes at least two batteries, and the data acquisition module independently acquires current working data of each battery.

[0036] Each battery in the battery pack has an independent serial number, and the alarm data output by the data output module includes the serial number of the battery.

[0037] The data output module outputs the alarm data via wired communication.

[0038] Alternatively, the data output module outputs the alarm data via wireless communication.

[0039] By numbering each battery, the alarm data includes the number, which is convenient for battery replacement or maintenance.

[0040] In some embodiments, the working status reference data interval can also be obtained by other means. However, when the working status reference data interval is obtained through experiments, the number of experiments should be as large as possible to ensure the accuracy of the working status reference data interval and reduce the number of false alarms of the alarm data.

[0041] The above describes the subject technical solution and corresponding details of the present invention. It can be understood that the above description is only some implementation plans of the subject technical solution of the present invention, and some details may be omitted during the specific implementation.

[0042] In addition, in some embodiments of the above invention, multiple embodiments may be implemented in combination, and various combinations are not listed one by one due to space limitations. Those skilled in the art can freely combine and implement the above embodiments as needed in specific implementation to obtain a better application experience.

[0043] When implementing the subject technical solution of the present invention, those skilled in the art can obtain other detailed configurations or drawings based on the subject technical solution of the present invention and the drawings. Obviously, these details still fall within the scope covered by the subject technical solution of the present invention without departing from the subject technical solution of the present invention.

Claims

1. A battery pack monitoring and prediction system, characterized in that: The invention comprises a data acquisition module, a data processing module and a data output module, wherein the data acquisition module and the data output module are in communication with the data processing module; the data acquisition module acquires data on the temperature, voltage, current and charge and discharge times of the battery pack; wherein the data acquisition module acquires the current charge and discharge times of the battery pack; the data processing module determines the attenuation degree of the battery pack according to the current charge and discharge times of the battery pack; the data processing module determines the working state reference data interval of the battery pack according to the attenuation degree of the battery pack, and the working state reference data interval includes the working temperature interval, the output voltage interval and the output current interval; the data acquisition module acquires the current working data of the battery pack, and the current working data includes the current temperature of the battery pack, the current output voltage of the battery pack and the current output current of the battery pack; the data processing module determines whether the current working data is within the working state reference data interval, and when the current working data is within the working state reference data interval, the data acquisition module continues to acquire the current working data of the battery pack; when the current working data is not within the working state reference data interval, the data processing module outputs alarm data through the data output module.

2. The battery pack monitoring and prediction system according to claim 1 is characterized in that: The working status reference data interval is obtained by the following steps: determining a test temperature interval according to the designed use temperature interval of the battery pack, the use temperature interval being the ambient temperature interval where the battery pack is located; determining a test data collection node according to the test temperature interval; collecting the working status test data interval according to the test data collection node; associating the working status test data and the test data collection node to obtain the working status reference data interval.

3. The battery pack monitoring and prediction system according to claim 2 is characterized in that: In the step of determining the test data collection node according to the temperature range, the test data collection nodes include a plurality of test data collection nodes, and the temperature difference between each test data collection node and an adjacent test data collection node does not exceed 0.5°C.

4. The battery pack monitoring and prediction system according to claim 3 is characterized in that: The temperature parameters collected by the data collection module include the temperature parameters of the battery pack itself and the ambient temperature of the battery pack.

5. The battery pack monitoring and prediction system according to claim 1 is characterized in that: The data processing module determines the attenuation degree of the battery pack according to the current charge and discharge times of the battery pack, and the attenuation degree of the battery pack is determined according to experiments.

6. The battery pack monitoring and prediction system according to claim 5 is characterized in that: The attenuation degree of the battery pack is determined according to the following steps: recording the number of charge and discharge times of the battery pack; associating the output voltage and output current of the battery pack with the number of charge and discharge times each time; fitting the attenuation curve of the battery pack through the output voltage, output current and number of charge and discharge times of the battery pack each time, and determining the attenuation degree according to the attenuation curve.

7. The battery pack monitoring and prediction system according to claim 1 is characterized in that: The battery pack includes at least two batteries, and the data acquisition module independently acquires current working data of each battery.

8. The battery pack monitoring and prediction system according to claim 6 is characterized in that: Each battery in the battery pack has an independent serial number, and the alarm data output by the data output module includes the serial number of the battery.

9. The battery pack monitoring and prediction system according to claim 8, characterized in that: The data output module outputs the alarm data via wired communication.

10. The battery pack monitoring and prediction system according to claim 8, characterized in that: The data output module outputs the alarm data via wireless communication.

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