Energy-saving lithium battery aging test management method and system

Abstract

The invention discloses an energy-saving lithium battery aging test management method and system, and relates to the technical field of lithium batteries, and the method comprises the steps: charging a to-be-tested battery module with zero electric quantity through a first charging module until the to-be-tested battery module is fully charged, charging an energy storage module with electric energy in one of the to-be-tested battery modules through a second charging module until the to-be-tested battery module is emptied, the first charging module charges the electric energy in the other battery module to be tested to the zero battery module to be tested, and the external power supply is utilized to fully charge the battery module to be tested; and circularly executing the charging operation between the to-be-tested battery modules until the number of cycles reaches a preset number of times, and generating a test result according to the recorded electric energy value. According to the method, the charging and discharging process is executed between more than two to-be-tested battery modules, the aging test process of all the to-be-tested battery modules can be completed by using limited electric energy, only energy conversion loss needs to be supplemented in the test process, and huge electric energy resources consumed in the existing test process are saved.

Description

Technical Field

[0001] The present application relates to the field of lithium battery technology, and in particular to an energy-saving lithium battery aging test management method and system. Background Art

[0002] Lithium batteries have become an indispensable part of modern society due to their excellent properties such as high energy density and long life. They are widely used in many technical fields such as electric vehicles, drones, power supplies for communication base stations, medical equipment, and aerospace.

[0003] Before lithium batteries leave the factory, charging and discharging tests are a key procedure for evaluating battery performance. The working principle is: by cyclically charging and discharging lithium batteries, key parameters such as capacity, cycle life, rate performance and charging performance are obtained to evaluate the comprehensive performance of lithium batteries.

[0004] However, in the prior art, when performing charge and discharge tests on lithium batteries, the method usually adopted is to use a charging module to charge the battery module, then use a discharge load to convert the electricity in the battery module into heat energy for consumption, and then obtain new energy from the power supply to perform the charging process for the battery module. In the long run, this will cause huge energy waste, especially in the battery aging test process. As the number of charge and discharge cycles increases, the phenomenon of energy waste is particularly obvious. At the same time, the prior art lacks a method for effectively managing battery modules after aging tests, resulting in a large number of battery modules that fail the aging test being directly discarded. Summary of the invention

[0005] The present application proposes an energy-saving lithium battery aging test management method and system to solve the problem of energy waste in the process of performing lithium battery charge and discharge tests in the prior art.

[0006] In a first aspect, the present application provides an energy-saving lithium battery aging test management method, comprising:

[0007] In response to a charging test instruction for the lithium battery module to be tested, a charging operation is performed on the lithium battery module to be tested with zero power through the first charging module until the lithium battery module to be tested reaches a full charge condition, and the charging power value charged into the lithium battery module to be tested is recorded through the first charging module;

[0008] In response to a discharge test instruction of the lithium battery module to be tested, the electric energy in the lithium battery module to be tested that has reached a full condition is charged to the energy storage module through the second charging module until the electric quantity in the lithium battery module to be tested is zero, and the discharge electric energy value charged into the energy storage module is recorded through the second charging module;

[0009] The test result of the lithium battery module to be tested is generated according to the charging electric energy value and / or the discharging electric energy value.

[0010] The lithium battery module to be tested includes a first battery module to be tested and a second battery module to be tested, the first charging module includes a first charging submodule and a second charging submodule, and the method further includes:

[0011] In response to an aging test instruction for a lithium battery module to be tested, a charging operation is performed on a first battery module to be tested with zero power through a first charging submodule until the first battery module to be tested reaches a full charge condition, and a first electric energy value charged into the first battery module to be tested is recorded through the first charging submodule;

[0012] Performing a charging operation on a second battery module to be tested with zero power through a second charging submodule until the second battery module to be tested reaches a full charge condition, and recording a second electric energy value charged into the second battery module to be tested through the second charging submodule;

[0013] Charging the electric energy in the second battery module to be tested into the energy storage module through the second charging module until the electric quantity in the second battery module to be tested is zero, and recording the third electric energy value charged into the energy storage module through the second charging module;

[0014] Charging the electric energy in the first battery module to be tested into the second battery module to be tested through the first charging submodule or the second charging submodule until the electric quantity in the first battery module to be tested is zero, and recording the fourth electric energy value charged into the second battery module to be tested through the first charging submodule or the second charging submodule;

[0015] Performing a charging operation on the second battery module to be tested that is charged with the fourth electric energy value by the first charging submodule until the second battery module to be tested reaches a full charge condition;

[0016] The charging operation between the first battery module to be tested and the second battery module to be tested is cyclically performed by the first charging submodule or the second charging submodule until the number of cycles reaches a preset number, and the test result of the lithium battery module to be tested is generated according to the recorded electric energy value.

[0017] In some feasible embodiments, the method further includes:

[0018] Cyclic execution of the charging operation between the first battery module to be tested and the second battery module to be tested by the first charging submodule or the second charging submodule until the number of cycles reaches a first number, and obtaining a test result corresponding to the recorded electric energy value; the first number is less than a preset number;

[0019] If the test result shows that the battery performance of the first battery module to be tested or the second battery module to be tested is poor, the first battery module to be tested or the second battery module to be tested is replaced by a third battery module to continue the charging operation between the modules.

[0020] In some feasible embodiments, the method further includes:

[0021] Acquire first information of a battery module to be tested with poor battery performance; the first information includes electric energy value, charge and discharge current, charge and discharge voltage, and cycle number;

[0022] According to a preset comparison table, a category mark is added to the battery module to be tested, and the category mark includes multiple categories; the preset comparison table is used to characterize the relationship between the first information and the category.

[0023] In some feasible embodiments, the full charge condition reached by the lithium battery module to be tested includes:

[0024] The voltage of the lithium battery module to be tested reaches a constant value, or the power of the lithium battery module to be tested reaches full power.

[0025] In some feasible embodiments, the method further includes:

[0026] Displaying the test result of the lithium battery module to be tested on a human-machine interface;

[0027] or,

[0028] Establish a communication connection with the terminal, and display the test results of the lithium battery module to be tested on the display interface of the terminal.

[0029] In some feasible embodiments, in the step of cyclically performing the charging operation between the first battery module to be tested and the second battery module to be tested by the first charging submodule or the second charging submodule, the method further includes:

[0030] Record real-time charging current and real-time charging voltage;

[0031] Generate status information of the first charging submodule or the second charging submodule according to the preset charging current, the real-time charging current and the real-time charging voltage;

[0032] The status information is added to the test result of the lithium battery module to be tested.

[0033] In a second aspect, the present application provides an energy-saving lithium battery aging test management system, the system comprising:

[0034] AC-DC module, used to convert the external AC voltage of the system into DC voltage;

[0035] A first charging module and a second charging module electrically connected to the lithium battery module to be tested, wherein the first charging module is used to perform a charging process on the lithium battery module to be tested according to the output of the AC-DC module, and to feed back state information of the first charging module during the charging process to the central processing unit; the second charging module is used to charge the electric energy in the lithium battery module to be tested that has reached a full condition to the energy storage module;

[0036] A power supply module, used to convert the output voltage of the AC-DC module into a voltage required for powering the system and to power the system;

[0037] A central processing unit, configured to execute the energy-saving lithium battery aging test management method described in the first aspect to generate a test result of the lithium battery module to be tested in response to a charging test instruction, a discharging test instruction or an aging test instruction;

[0038] The lithium battery module to be tested includes a first battery module to be tested and a second battery module to be tested, and the first charging module includes a first charging submodule and a second charging submodule;

[0039] The first charging submodule is used to perform a charging operation on a first battery module to be tested whose power is zero, until the first battery module to be tested reaches a full charge condition, and record a first electric energy value charged into the first battery module to be tested;

[0040] The second charging submodule is used to perform a charging operation on the second battery module to be tested with zero power, until the second battery module to be tested reaches a full condition, and record a second power value charged into the second battery module to be tested; charge the power in the second battery module to be tested to the energy storage module, until the power in the second battery module to be tested is zero, and record a third power value charged into the energy storage module;

[0041] The first charging submodule or the second charging submodule is further used to charge the electric energy in the first battery module to be tested into the second battery module to be tested until the electric quantity in the first battery module to be tested is zero, and record the fourth electric energy value charged into the second battery module to be tested;

[0042] The first charging submodule is further used to perform a charging operation on the second battery module to be tested that is charged with the fourth electric energy value until the second battery module to be tested reaches a full charge condition;

[0043] The first charging submodule or the second charging submodule is also used to cyclically execute the charging operation between the first battery module to be tested and the second battery module to be tested until the number of cycles reaches a preset number, and generate the test result of the lithium battery module to be tested according to the recorded electric energy value.

[0044] In some feasible embodiments, the system further includes:

[0045] Communication module, used to establish communication connection with external terminals to realize data interaction;

[0046] The human-machine interface is used for the user to input performance test instructions and display the status test results of the lithium battery.

[0047] In some feasible embodiments, the system further includes:

[0048] Sensor module, used to obtain environmental information;

[0049] The storage module is used to provide data storage.

[0050] In some feasible embodiments, the system further includes:

[0051] The energy storage unit is used to power the system when the AC-DC module is not working.

[0052] The method of the present application performs the charging and discharging process between more than two battery modules to be tested, and can complete the aging test process for all battery modules to be tested using limited electrical energy. During the test process, only the energy conversion loss needs to be supplemented, which greatly saves the huge electrical energy resources consumed in the existing test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative work:

[0054] Figure 1 A system block diagram of an embodiment of an energy-saving lithium battery aging test management method of the present application;

[0055] Figure 2 This is a system block diagram of another embodiment of an energy-saving lithium battery aging test management method of the present application. DETAILED DESCRIPTION

[0056] In order to better demonstrate the technical solution disclosed in the present invention, the following will be combined with the accompanying drawings to make a more complete and clear description of the technical solution in the embodiments of the present invention. It should be noted that the following description is only based on a part of the embodiments of the technical solution of the present invention, not all embodiments.

[0057] During conventional battery module charge and discharge tests, a discharge load is usually used as a means of consuming electrical energy. The electrical energy is converted into heat energy and consumed, and then new energy is obtained from the power grid to charge the battery module. This will cause a huge waste of energy in the long run, especially during battery aging tests, where energy consumption is more obvious.

[0058] Embodiment 1

[0059] In order to solve the above problems, the present application provides an embodiment of an energy-saving lithium battery aging test management method. Figure 1 The system implementation shown in the figure has the following main functional modules:

[0060] AC-DC module, used to convert the system's external AC power into DC power; responsible for providing power to the power module and charging module;

[0061] Lithium battery module: can be a battery pack or a combination of multiple identical battery packs, which is the charging and discharging battery module to be tested or the aging battery module to be tested.

[0062] A first charging module and a second charging module electrically connected to the lithium battery module, the first charging module and the second charging module are used to perform a charging process on the lithium battery module according to the output of the AC-DC module, and to feed back to the central processing unit the status information of the first charging module during the charging process, such as the set charging current, real-time charging current, real-time charging voltage, etc.; the second charging module is used to output the electric energy in the lithium battery module to be tested to the energy storage module, and record the status information of the charging process, which is the same type as that contained in the aforementioned status information.

[0063] The power supply module provides power to the signal part of the system, and is used to convert the output voltage of the AC-DC module into the voltage required for powering the system and powering the system; this part of the module may include an energy storage unit to provide working power to the system when the AC-DC module has no external power supply.

[0064] Central Processing Unit, The Central Processing Unit (CPU) is the "brain" of the system, responsible for the system's functional logic control, communication data processing, power calculation processing, human-computer interface control, etc.

[0065] Energy storage module, backup lithium battery module, is a temporary storage area for battery power.

[0066] Based on the above system, the energy-saving lithium battery aging test management method includes:

[0067] S110: In response to a charging test instruction for the lithium battery module to be tested, a charging operation is performed on the lithium battery module to be tested with zero power through the first charging module until the lithium battery module to be tested reaches a full charge condition, and the charging energy value charged into the lithium battery module to be tested is recorded through the first charging module; in this embodiment, there may be multiple methods for determining whether the full charge condition is reached, for example, whether the battery is full may be determined by determining whether the battery voltage reaches a preset voltage, or the power range may be obtained by determining whether the battery power reaches a corresponding power value in a preset parameter.

[0068] S120: In response to a discharge test instruction for the lithium battery module to be tested, the electric energy in the lithium battery module to be tested that has reached a full condition is charged to the energy storage module through the second charging module until the electric quantity in the lithium battery module to be tested is zero, and the discharge electric energy value charged into the energy storage module is recorded through the second charging module.

[0069] It should be noted that, in this embodiment, the order of steps S120 and S110 is not fixed and can be interchanged, that is, the discharge process is performed first and then the charging process; they can also be performed separately, depending on the actual needs of the user and are not limited here.

[0070] In this embodiment, the capacity of the energy storage module should be as large as possible, at least greater than the maximum power value of the lithium battery module to be tested, to ensure that the actual test requirements are met. After the test, the power in the energy storage module can be used by other external devices, and there is no restriction on how to use it in this embodiment.

[0071] S130: Generate a test result of the lithium battery module to be tested according to the charging electric energy value and / or the discharging electric energy value.

[0072] In this embodiment, when generating the test results, the recorded electric energy value can be compared with the preset parameters, and the charge and discharge performance of the lithium battery module to be tested can be determined based on the comparison results, wherein the preset parameters can be the electric energy parameters of the lithium battery given by the lithium battery manufacturer before the battery leaves the factory and stored in the test system. It should be noted that the preset parameters can be a specific value, a range interval, or a parameter table used to characterize the changes of various parameters under different conditions. When comparing the electric energy value with the preset parameters, the method that can be adopted is to determine whether the electric energy value reaches the preset parameters, or whether the difference with the preset parameters meets the reasonable range, or, according to the service life of the battery, determine whether the real-time performance parameters meet the corresponding preset parameters under the current service year.

[0073] In addition, the charging and discharging test results for lithium batteries can reflect the proportion of the electric energy value to the preset parameters, for example, the current charging electric energy value is 98% of the preset maximum electric energy value, or it can only feedback whether the electric energy value meets the preset parameter conditions. For example, if it meets the preset parameter conditions, a detection result that the lithium battery is in good condition is generated; if it does not meet or meets specific conditions, a detection result that the lithium battery has failed or is in poor condition is generated.

[0074] Furthermore, in some other embodiments, the method further includes:

[0075] The charging and discharging test results of the lithium battery are displayed on a human-machine interface; the human-machine interface and control buttons of the system can be in various forms such as a touch screen, physical buttons, etc.

[0076] or,

[0077] Establish a communication connection with the terminal, and display the charge and discharge test results of the lithium battery on the display interface of the terminal. The information interaction between the system and the external terminal can be measurement data and control data; the communication method can be wireless or wired, depending on the external communication form; the communication protocol can be determined according to the actual hardware interface and actual requirements, and is not limited here.

[0078] It can be seen from the above embodiments that in the method provided by the present application, when the charge and discharge test process is performed on the lithium battery to be tested, a storage module with a larger capacity is used to temporarily store the electric energy output by the lithium battery to avoid directly converting the electric energy into heat energy for consumption. The stored electric energy can be used for other power supply scenarios, thereby achieving the effect of saving electric energy.

[0079] Embodiment 2

[0080] In practical applications, battery aging testing is a technical scenario that produces a huge loss of electric energy resources, because the aging battery / battery pack to be tested needs to repeatedly perform the process of "charging to full power - then discharging the power", and the discharge process usually uses resistance to consume electric energy, resulting in huge consumption of electric energy. In view of this aging mode, the testers who can implement battery aging testing can only be large manufacturers or power suppliers with large power reserves. Therefore, in order to solve the problem of electric energy consumption and enable ordinary users or small and medium-sized businesses to achieve the purpose of aging testing of batteries, this application proposes a method under another embodiment. The method of this embodiment is more applicable to the scenario of battery aging testing.

[0081] In the above-mentioned embodiment, a group of lithium battery modules to be tested are used as an example to illustrate the charge and discharge test process. If the number of charge and discharge tests in a short period of time is large (for example, in the scenario of aging test), the solution of embodiment one requires a very large capacity of the energy storage module. At the same time, multiple charging operations on the energy storage module also have a certain impact on the service life of the energy storage module itself. In order to make the method of the present application applicable to the scenario of aging test, on the basis of embodiment one, the present application provides an embodiment of an energy-saving lithium battery aging test management method. The method is Figure 2 The system implementation shown is Figure 1 The systems differ in that:

[0082] The lithium battery module to be tested includes a first battery module to be tested and a second battery module to be tested, and the first charging module includes a first charging submodule and a second charging submodule, wherein the first charging submodule can charge both the first battery module to be tested and the second battery module to be tested, and similarly, the second charging submodule can charge both the first battery module to be tested and the second battery module to be tested. The method provided in this embodiment is applicable to simultaneously performing an aging test process on two or more battery modules to be tested, and is described below by taking two battery modules to be tested as an example.

[0083] based on Figure 2 The system shown, the method provided by the present application also includes:

[0084] S220: In response to an aging test instruction for a lithium battery module to be tested, a charging operation is performed on a first battery module to be tested with a zero charge through a first charging submodule until the first battery module to be tested reaches a full charge condition, and a first electric energy value charged into the first battery module to be tested is recorded through the first charging submodule; in this embodiment, there may be a variety of methods for determining whether the full charge condition is reached, for example, whether the battery is full (reaches a fully charged state) may be determined by determining whether the battery voltage reaches a preset voltage, or the charge range may be obtained by determining whether the battery charge reaches a corresponding charge value in a preset parameter.

[0085] S230: Performing a charging operation on the second battery module to be tested with zero power through the second charging submodule until the second battery module to be tested reaches a full charge condition, and recording a second electric energy value charged into the second battery module to be tested through the second charging submodule.

[0086] It should be noted that, in this embodiment, the order of steps S220 and S230 is not limited, and they can be performed simultaneously. In addition, in this application, the first and second are only for the convenience of distinguishing two charging submodules or two battery modules to be tested. It should be understood that the first battery module to be tested and the second battery module to be tested should be the same type of lithium battery module (the capacity can be different), and the first charging submodule and the second charging submodule should be charging modules that can perform the same function.

[0087] In steps S220 and S230, the two battery modules to be tested need to be fully charged first, and the input power values ​​are recorded through their respective charging submodules.

[0088] S240: Charge the electric energy in the second battery module to be tested to the energy storage module through the second charging module until the electric energy in the second battery module to be tested is zero, and record the third electric energy value charged into the energy storage module through the second charging module; in this embodiment, it is necessary to discharge the electric energy of one of the two battery modules to be tested, that is, in this step, the electric energy in the first battery module to be tested can also be charged to the energy storage module to ensure that, of the two battery modules to be tested, one is fully charged and the other is discharged.

[0089] S250: Charge the electric energy in the first battery module to be tested to the second battery module to be tested through the first charging submodule or the second charging submodule until the electric energy in the first battery module to be tested is zero, and record the fourth electric energy value charged into the second battery module to be tested through the first charging submodule or the second charging submodule.

[0090] It should be noted that, in actual applications, taking into account factors such as charging efficiency, even if there are two battery modules to be tested of the same type and with the same power, assuming that the energy storage energy before charging is equal, the power of the first battery module to be tested is not enough to fully charge the second battery module to be tested. Therefore, it is necessary to execute the following S260 step to replenish the power value of the second battery module to be tested so that it can be restored to a fully charged state.

[0091] S260: Perform a charging operation on the second battery module to be tested that is charged with the fourth electric energy value through the first charging submodule until the second battery module to be tested reaches the full condition; wherein, the first charging submodule needs to adjust the input source to the output of the AC-DC module, and use the external power supply to fully charge the second battery module to be tested. It can be seen that in this embodiment, most of the electric energy source when the second battery module to be tested is fully charged comes from the first battery module to be tested, and only a small part comes from the external power supply supplement. This small part is due to energy conversion loss, which accounts for a smaller proportion than the previous part. Therefore, using the method provided in the present application, when the number of charging and discharging processes increases, the electric energy consumed is only this small part of the lost electric energy multiplied by the number of times, which greatly saves the loss of electric energy compared to the prior art.

[0092] S270: Cyclically executing the charging operation between the first battery module to be tested and the second battery module to be tested through the first charging submodule or the second charging submodule until the number of cycles reaches a preset number, and generating a test result of the lithium battery module to be tested according to the recorded electric energy value.

[0093] The above process realizes the process of simultaneously performing aging tests on two battery modules to be tested. Similarly, when there are three or more battery modules to be tested, it is also possible to first discharge the power of one battery module to be tested to the energy storage module, and then sequentially charge the power of other battery modules to be tested into the battery module to be tested with zero power, and then perform the "recharge" operation on each battery module to be tested that is not fully charged, thereby realizing the aging test process of each battery module to be tested. Therefore, the solution of the present application can also be applied to the scenario where multiple battery modules to be tested are subjected to aging tests at the same time.

[0094] Furthermore, the method further comprises:

[0095] Cyclic execution of the charging operation between the first battery module to be tested and the second battery module to be tested by the first charging submodule or the second charging submodule until the number of cycles reaches a first number, and obtaining a test result corresponding to the recorded electric energy value; the first number is less than a preset number;

[0096] If the test result shows that the battery performance of the first battery module to be tested or the second battery module to be tested is poor, the first battery module to be tested or the second battery module to be tested is replaced by a third battery module to continue the charging operation between the modules.

[0097] It should be noted that, in the present embodiment, the first battery module to be tested and the second battery module to be tested can be the same battery modules with the same design power. During the aging test (for example, when N charge and discharge cycles are performed), if it is detected that the test result corresponding to a certain battery module to be tested shows that the battery performance is low, and the test result corresponding to the other battery module to be tested shows that the battery performance is temporarily qualified, at this time, the system can prompt to remove the battery module to be tested with lower performance and replace it with other battery modules with the same design power, and continue the aging process with the original battery module. At this time, the number of charge and discharge cycles of the two groups of battery modules to be tested can be counted separately.

[0098] For example, when the test starts, aging tests are performed on battery module A and battery module B at the same time, and the number of charge and discharge cycles is set to 10 times. When the cycle reaches 5 times (or other times), it is found that the performance of battery module B is low. At this time, battery module B can be taken out and replaced with battery module C. Battery module C and battery module A continue to be aged according to the above method. Since battery module A has been cycled 5 times (or other times), battery module A will reach the set 10 times earlier than battery module C. After battery module A completes the aging test, it can be taken out and replaced with battery module D, so that battery module D and battery module C that have not reached the set number of times continue to perform the next aging test.

[0099] In this embodiment, for the battery modules to be tested due to low battery performance, after being taken out, they may not be directly treated as scrapped depending on the situation. The battery modules can be marked and graded according to factors such as the degree of battery aging and the number of cycles when taken out. The classification standards can be the maximum electric energy value, the remaining power, the charging and discharging parameters, etc., which are not limited here. For a battery module that is still at a higher level, it can only be said that it cannot be applied to the existing technical scenarios, but for scenarios with low power demand, it can still be effectively applied. Therefore, the battery level can be determined according to the classification and screening of the battery modules, and the corresponding new technical scenarios can be selected.

[0100] Therefore, the method in this embodiment may further include:

[0101] Obtain first information of a battery module to be tested with poor battery performance; the first information includes electric energy value, charge and discharge current, charge and discharge voltage and number of cycles; wherein the first information is obtained from the recording of the number of cycles and electric energy value by the charging submodule during the cycle, and from the current and voltage recording of the charge and discharge process.

[0102] According to a preset comparison table, a category mark is added to the battery module to be tested, and the category mark includes multiple categories; the preset comparison table is used to characterize the relationship between the first information and the category.

[0103] For example, taking the power as the main judgment basis, in the preset comparison table, the battery module category can be divided into five levels: high, medium-high, medium, medium-low, and low. Each level corresponds to an interval of electric energy value. When the electric energy value of a first information value of a battery module to be tested falls into a certain interval, the preset comparison table can be used to determine which level the battery module category belongs to. It should be noted that the above is only an example of a single parameter of power. In actual applications, the level judgment basis or value range in the preset comparison table can be formulated based on a comprehensive consideration of multiple parameters such as electric energy value and number of cycles, which is not limited here.

[0104] In addition, the energy storage module in this embodiment can be further configured as follows: when any battery module to be tested has a discharge demand, it can be preferentially discharged to the energy storage module without discharging to other battery modules to be tested; as the amount of electricity in the energy storage module gradually increases, when its stored electricity exceeds a certain proportion, the energy storage module can replace the external power supply to achieve the "top-up" charging operation. It should be understood that when the amount of electricity in the energy storage module does not exceed a certain proportion, the external power supply is still preferentially selected to achieve the top-up operation, which can maximize the reduction of the loss of the energy storage module to increase the service life of the energy storage module. After the aging test is completed, if a certain amount of electrical energy is stored in the energy storage module, it can be used by other devices.

[0105] It can be seen from the above technical solution that the method provided in the present application performs the charging and discharging process between more than two battery modules to be tested, and can complete the aging test process for all battery modules to be tested using limited electric energy. During the test process, only the energy conversion loss needs to be supplemented, which greatly saves the huge electric energy resources consumed in the existing test process.

[0106] At the same time, the solution provided by this application consumes less energy, so that the aging test process that was originally only available in specific institutions or battery manufacturers can now be performed at the user end or general resource terminals, greatly increasing the application scope and applicability of the aging test.

[0107] Furthermore, in some feasible embodiments, step S270 further includes:

[0108] Record real-time charging current and real-time charging voltage;

[0109] Generate status information of the first charging submodule or the second charging submodule according to the preset charging current, the real-time charging current and the real-time charging voltage;

[0110] The status information is added to the test result of the lithium battery module to be tested.

[0111] In this embodiment, the factors affecting the battery aging performance are not just the single parameter of the electric energy value. For example, unstable charging current and voltage are also one of the manifestations of battery aging. Therefore, while recording the electric energy value, the charging current, voltage and other parameters are also recorded together, and combined with the comparison results of the system analysis results and the electric energy value, which is more conducive to accurate and effective evaluation of the performance of the battery module to be tested.

[0112] The above technical solution enables ordinary users or small and medium-sized businesses to implement battery aging tests. Of course, the solution of this embodiment can also be used by battery manufacturers or large businesses. Since battery manufacturers or large businesses have sufficient resources, they can often implement aging test processes for multiple batches and large quantities of battery modules. When the method of this application is applied, not only can aging tests be implemented, but also batch management and remote management of aging batteries can be achieved using the following solution. Therefore, in the grading and screening of different batches and different battery modules to be tested, battery modules that pass the aging test can be graded and managed separately, while battery modules that fail the aging test can be graded and managed separately; all battery modules that have undergone aging tests can also be managed uniformly.

[0113] For example, the category (the gear position in the preset comparison table) of the battery module can be adjusted through an aging test. For example, a battery module belongs to a high category when it leaves the factory. After being used for a certain period of time, it is shown to be unqualified after an aging test, and the preset comparison table determines that its current gear position should be a mid-range position. In this way, the gear position of the battery module can be updated immediately in the system, and a new usage scenario corresponding to the mid-range position can be matched for the battery module.

[0114] It can be seen that the aging test method of the present application can also improve the applicability of the battery by classifying and managing the battery modules after the aging test.

[0115] Embodiment 3

[0116] Corresponding to the first and second embodiments, the present application provides an energy-saving lithium battery aging test management system, see Figure 2 , the system comprising:

[0117] AC-DC module, used to convert the external AC voltage of the system into DC voltage;

[0118] A first charging module and a second charging module electrically connected to the lithium battery module to be tested, wherein the first charging module is used to perform a charging process on the lithium battery module to be tested according to the output of the AC-DC module, and to feed back state information of the first charging module during the charging process to the central processing unit; the second charging module is used to charge the electric energy in the lithium battery module to be tested that has reached a full condition to the energy storage module;

[0119] A power supply module, used to convert the output voltage of the AC-DC module into a voltage required for powering the system and to power the system;

[0120] The central processing unit is used to execute the energy-saving lithium battery aging test management method described in the previous embodiment to generate a test result of the lithium battery module to be tested in response to a charging test instruction, a discharging test instruction or an aging test instruction.

[0121] Wherein, the lithium battery module to be tested includes a first battery module to be tested and a second battery module to be tested, and the first charging module includes a first charging submodule and a second charging submodule;

[0122] The first charging submodule is used to perform a charging operation on a first battery module to be tested whose power is zero, until the first battery module to be tested reaches a full charge condition, and record a first electric energy value charged into the first battery module to be tested;

[0123] The second charging submodule is used to perform a charging operation on the second battery module to be tested with zero power, until the second battery module to be tested reaches a full condition, and record a second power value charged into the second battery module to be tested; charge the power in the second battery module to be tested to the energy storage module, until the power in the second battery module to be tested is zero, and record a third power value charged into the energy storage module;

[0124] The first charging submodule or the second charging submodule is further used to charge the electric energy in the first battery module to be tested into the second battery module to be tested until the electric quantity in the first battery module to be tested is zero, and record the fourth electric energy value charged into the second battery module to be tested;

[0125] The first charging submodule is further used to perform a charging operation on the second battery module to be tested that is charged with the fourth electric energy value until the second battery module to be tested reaches a full charge condition;

[0126] The first charging submodule or the second charging submodule is also used to cyclically execute the charging operation between the first battery module to be tested and the second battery module to be tested until the number of cycles reaches a preset number, and generate the test result of the lithium battery module to be tested according to the recorded electric energy value.

[0127] In some other embodiments, the system further comprises one or more of the following:

[0128] The communication module is used to establish a communication connection with an external terminal to realize data interaction; the interactive data can be measurement data or control data; the communication method can be wireless or wired, depending on the external communication form; the communication protocol can be determined based on the actual hardware interface and actual requirements.

[0129] The human-machine interface is used for user input of commands and display of lithium battery test results; the system status indication interface and control buttons can be in various forms such as touch screen, physical buttons, etc.

[0130] The sensor module (not shown in the figure) is used to obtain environmental information; such as temperature, humidity, pressure, gas, posture, etc.

[0131] A storage module, used for providing data storage;

[0132] In some other embodiments, the system may further include an energy storage unit (not shown in the figure) for supplying power to the system when the AC-DC module is not working, that is, when there is no external power supply.

[0133] The workflow of the system provided in this application in actual application is as follows:

[0134] Work preparation: The system is connected to an AC power supply, and the specified DC power is generated and output through the AC-DC module. The power module provides power to the system. After the system module is powered on; the central processor obtains the status information of the battery module to be tested and obtains the pre-set related operating data information from the storage module.

[0135] Battery charging mode: When the first battery module to be tested and the second battery module to be tested remain in an empty state, the battery charging mode is started, the system controls the internal switch, connects the input of the first charging submodule to the output of the AC-DC module, connects the input of the second charging submodule to the output of the AC-DC module, connects the output of the first charging submodule to the first battery module to be tested, and connects the output of the second charging submodule to the second battery module to be tested, obtains the charging parameters of the system, starts the charging module, synchronously monitors the charging capacity until the battery module is fully charged, and records the charging energy value.

[0136] Battery discharge mode: When the first battery module to be tested and the second battery module to be tested are in a fully charged state, the battery discharge mode is started, the system controls the internal switch, connects the input of the second charging module to the output of the first battery module to be tested, connects the input of the second charging module to the output of the second battery module to be tested, and connects the output of the second charging module to the energy storage module, obtains the discharge parameters of the system, starts the second charging module, and simultaneously monitors the charging power until the battery module is emptied, and records the charging power value. At this time, the electric energy of the first battery module to be tested and the second battery module to be tested is stored in the energy storage module. Considering the actual application situation, the energy storage module can be two independent ones, which are respectively connected to the output of the first charging submodule and the second charging submodule, and the capacity is as large as possible to meet actual needs.

[0137] Battery aging mode: (Charging process) When the first battery module to be tested and the second battery module to be tested remain in an empty state, the battery charging mode is started, the system controls the internal switch, connects the input of the first charging submodule to the output of the AC-DC module, connects the input of the second charging submodule to the output of the AC-DC module, connects the output of the first charging submodule to the first battery module to be tested, and connects the output of the second charging submodule to the second battery module to be tested, obtains the charging parameters of the system, starts the first charging submodule and the second charging submodule, synchronously monitors the charging power until the battery module is fully charged, and records the charging energy value. (Discharging process) Disconnect the external input and output of the first charging submodule; disconnect the external input and output of the first battery module to be tested; connect the output of the second battery module to the input of the second charging module, connect the output of the second charging module to the input of the energy storage module, obtain the discharge parameters of the system, start the second charging module, synchronously monitor the charging power until the second battery module to be tested is emptied, and record the discharge energy value. (Re-discharge process) Disconnect the external input and output of the first charging submodule; disconnect the external input of the first battery module to be tested; connect the input of the second battery module to be tested to the output of the second charging submodule, connect the output of the first battery module to be tested to the input of the second charging submodule, obtain the discharge parameters of the system, start the second charging submodule, synchronously monitor the charging power until the first battery module to be tested is discharged, store the power of the first battery module to be tested in the second battery module to be tested, and record the discharged power value (in actual application, considering efficiency factors and other reasons, considering that the first and second battery modules to be tested are modules of the same type, assuming that the energy storage energy is equal, then the power of the first battery module to be tested is not enough to fully charge the second battery module to be tested. At this time, it is necessary to adjust the external switch again to adjust the input source of the second charging submodule to the external energy storage module or the output of the AC-DC power supply). The central processing unit controls the switches between the modules through the power evaluation logic, alternately transferring the power of the first battery module to be tested to the second battery module to be tested, and then moving the power of the second battery module to be tested back to the first battery module to be tested, thereby realizing the aging test process of the first battery module to be tested and the second battery module to be tested.

[0138] It should be noted that in the system provided by the present application, except for the lithium battery module to be tested, the remaining functional modules can be combined into an independent battery testing system product / device for detecting the lithium battery module to be tested. At the same time, it can also be integrated into existing medical device products as a whole as an independent function in existing medical device products, which is not limited here.

[0139] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

[0140] The above-described embodiments of the present invention do not limit the protection scope of the present invention.

Claims

1. An energy-saving lithium battery aging test management method, characterized in that: include: In response to a charging test instruction for the lithium battery module to be tested, a charging operation is performed on the lithium battery module to be tested with zero power through the first charging module until the lithium battery module to be tested reaches a full charge condition, and the charging power value charged into the lithium battery module to be tested is recorded through the first charging module; In response to a discharge test instruction of the lithium battery module to be tested, the electric energy in the lithium battery module to be tested that has reached a full condition is charged to the energy storage module through the second charging module until the electric quantity in the lithium battery module to be tested is zero, and the discharge electric energy value charged into the energy storage module is recorded through the second charging module; Generate a test result of the lithium battery module to be tested according to the charging electric energy value and / or the discharging electric energy value; the lithium battery module to be tested includes a first battery module to be tested and a second battery module to be tested, the first charging module includes a first charging submodule and a second charging submodule, and the method further includes: In response to an aging test instruction for a lithium battery module to be tested, a charging operation is performed on a first battery module to be tested with zero power through a first charging submodule until the first battery module to be tested reaches a full charge condition, and a first electric energy value charged into the first battery module to be tested is recorded through the first charging submodule; Performing a charging operation on a second battery module to be tested with zero power through a second charging submodule until the second battery module to be tested reaches a full charge condition, and recording a second electric energy value charged into the second battery module to be tested through the second charging submodule; Charging the electric energy in the second battery module to be tested into the energy storage module through the second charging module until the electric quantity in the second battery module to be tested is zero, and recording the third electric energy value charged into the energy storage module through the second charging module; Charging the electric energy in the first battery module to be tested into the second battery module to be tested through the first charging submodule or the second charging submodule until the electric quantity in the first battery module to be tested is zero, and recording the fourth electric energy value charged into the second battery module to be tested through the first charging submodule or the second charging submodule; Performing a charging operation on the second battery module to be tested that is charged with the fourth electric energy value by the first charging submodule until the second battery module to be tested reaches a full charge condition; The charging operation between the first battery module to be tested and the second battery module to be tested is cyclically performed by the first charging submodule or the second charging submodule until the number of cycles reaches a preset number, and the test result of the lithium battery module to be tested is generated according to the recorded electric energy value.

2. The energy-saving lithium battery aging test management method according to claim 1 is characterized in that: The method further comprises: Cyclic execution of the charging operation between the first battery module to be tested and the second battery module to be tested by the first charging submodule or the second charging submodule until the number of cycles reaches a first number, and obtaining a test result corresponding to the recorded electric energy value; the first number is less than a preset number; If the test result shows that the battery performance of the first battery module to be tested or the second battery module to be tested is poor, the first battery module to be tested or the second battery module to be tested is replaced by a third battery module to continue the charging operation between the modules.

3. The energy-saving lithium battery aging test management method according to claim 2 is characterized in that: The method further comprises: Acquire first information of a battery module to be tested with poor battery performance; the first information includes electric energy value, charge and discharge current, charge and discharge voltage, and cycle number; According to a preset comparison table, a category mark is added to the battery module to be tested, and the category mark includes multiple categories; the preset comparison table is used to characterize the relationship between the first information and the category.

4. The energy-saving lithium battery aging test management method according to claim 1 is characterized in that: The full charge conditions of the lithium battery module to be tested include: The voltage of the lithium battery module to be tested reaches a constant value, or the power of the lithium battery module to be tested reaches full power.

5. The energy-saving lithium battery aging test management method according to claim 1, characterized in that: The method further comprises: Displaying the test result of the lithium battery module to be tested on a human-machine interface; or, Establish a communication connection with the terminal, and display the test results of the lithium battery module to be tested on the display interface of the terminal.

6. The energy-saving lithium battery aging test management method according to claim 2, characterized in that: In the step of cyclically performing a charging operation between the first battery module to be tested and the second battery module to be tested through the first charging submodule or the second charging submodule, the method further includes: Record real-time charging current and real-time charging voltage; Generate status information of the first charging submodule or the second charging submodule according to the preset charging current, the real-time charging current and the real-time charging voltage; The status information is added to the test result of the lithium battery module to be tested.

7. An energy-saving lithium battery aging test management system, characterized in that: The system comprises: AC-DC module, used to convert the external AC voltage of the system into DC voltage; A first charging module and a second charging module electrically connected to the lithium battery module to be tested, wherein the first charging module is used to perform a charging process on the lithium battery module to be tested according to the output of the AC-DC module, and to feed back state information of the first charging module during the charging process to the central processing unit; the second charging module is used to charge the electric energy in the lithium battery module to be tested that has reached a full condition to the energy storage module; A power supply module, used to convert the output voltage of the AC-DC module into a voltage required for powering the system and to power the system; A central processing unit, configured to execute the energy-saving lithium battery aging test management method according to any one of claims 1 to 6, so as to generate a test result of the lithium battery module to be tested in response to a charging test instruction, a discharging test instruction or an aging test instruction; Wherein, the lithium battery module to be tested includes a first battery module to be tested and a second battery module to be tested, and the first charging module includes a first charging submodule and a second charging submodule; The first charging submodule is used to perform a charging operation on a first battery module to be tested whose power is zero, until the first battery module to be tested reaches a full charge condition, and record a first electric energy value charged into the first battery module to be tested; The second charging submodule is used to perform a charging operation on the second battery module to be tested with zero power, until the second battery module to be tested reaches a full condition, and record a second power value charged into the second battery module to be tested; charge the power in the second battery module to be tested to the energy storage module, until the power in the second battery module to be tested is zero, and record a third power value charged into the energy storage module; The first charging submodule or the second charging submodule is further used to charge the electric energy in the first battery module to be tested into the second battery module to be tested until the electric quantity in the first battery module to be tested is zero, and record the fourth electric energy value charged into the second battery module to be tested; The first charging submodule is further used to perform a charging operation on the second battery module to be tested that is charged with the fourth electric energy value until the second battery module to be tested reaches a full charge condition; The first charging submodule or the second charging submodule is also used to cyclically execute the charging operation between the first battery module to be tested and the second battery module to be tested until the number of cycles reaches a preset number, and generate the test result of the lithium battery module to be tested according to the recorded electric energy value.

8. The energy-saving lithium battery aging test management system according to claim 7, characterized in that: The system further comprises: Communication module, used to establish communication connection with external terminals to realize data interaction; The human-machine interface is used for the user to input performance test instructions and display the status test results of the lithium battery.

9. The energy-saving lithium battery aging test management system according to claim 7, characterized in that: The system further comprises: Sensor module, used to obtain environmental information; The storage module is used to provide data storage.

10. The energy-saving lithium battery aging test management system according to claim 7, characterized in that: The system further comprises: The energy storage unit is used to power the system when the AC-DC module is not working.

Images