CN104569841A - Aging detection method and device for battery pack - Google Patents

Abstract

The invention discloses an aging detection method and device for a battery pack. Among them, the method includes: after receiving a detection request for detecting the aging degree of the battery group to be tested, establishing a connection with the battery group to be tested; obtaining preset charging and discharging parameters corresponding to the testing request; The discharge parameters are used to perform charge and discharge tests on the battery pack to be tested; to collect the voltage parameters and current parameters when the battery pack to be tested is charged and discharged; to determine the battery aging data corresponding to the voltage parameters and current parameters. The present invention solves the problem of slow detection of the aging degree of the battery in the prior art, and realizes the effect of rapidly and accurately detecting the aging degree of the battery pack.

Description

Aging detection method and device for battery pack

technical field

The invention relates to the field of battery detection, in particular to an aging detection method and device for a battery pack.

Background technique

Now, batteries are widely used in various fields. Batteries are usually packaged into groups of battery cells, that is, used in the form of battery packs. The battery cells in the same battery pack are generally of the same model, and the initial parameters of the batteries are very close. In the actual use of the battery pack, it is necessary to frequently detect the aging degree of the battery pack. If there is a battery pack with a high degree of aging, it needs to be rejected to avoid affecting the work.

At present, the method for detecting the aging degree of the battery pack is generally a large current full discharge method. This method needs to measure the actual capacity of the battery by fully charging and discharging the battery pack. The entire measurement process is not only time-consuming, but also the measurement operation itself aggravates the aging of the battery.

For the problem of slow detection of the aging degree of the battery pack in the prior art, no effective solution has been proposed yet.

Contents of the invention

Aiming at the problem of slow detection of the aging degree of the battery pack in the related art, no effective solution has been proposed so far. Therefore, the main purpose of the present invention is to provide a method and device for detecting the aging of the battery pack to solve the above problems.

In order to achieve the above object, according to one aspect of the present invention, a method for detecting the aging of a battery pack is provided, the method comprising: after receiving a detection request for detecting the aging degree of the battery pack to be tested, establishing a connection with the battery pack to be tested ; Obtain the preset charge and discharge parameters corresponding to the detection request; perform a charge and discharge test on the battery pack to be tested according to the preset charge and discharge parameters through the charge and discharge circuit; collect voltage parameters and current parameters when the battery pack to be tested is charged and discharged; determine Battery aging data corresponding to voltage parameters and current parameters.

Further, after receiving the detection request for detecting the aging degree of the battery pack to be tested, the aging detection method further includes: obtaining the model of the battery pack to be tested; obtaining the preset charge and discharge parameters corresponding to the detection request includes: reading The preset charge and discharge parameters.

Further, performing the charging and discharging test on the battery pack to be tested according to the preset charging and discharging parameters through the charging and discharging circuit includes: determining to perform the charging test or discharging test on the battery pack to be tested through the preset charging and discharging parameters; if the charging test is performed on the battery pack to be tested, Control the analog switch to connect the charging circuit and the charging circuit of the battery pack to be tested; if the battery pack to be tested is subjected to a discharge test, control the analog switch to connect the discharge circuit and the discharge circuit of the battery pack to be tested.

Further, performing the charging and discharging test on the battery pack under test according to the preset charging and discharging parameters through the charging and discharging circuit includes: sending the preset charging and discharging parameters to the battery pack management unit, and controlling the charging and discharging of the battery pack under test through the battery pack management unit.

Further, after determining the battery aging data corresponding to the voltage parameter and the current parameter, the aging detection method further includes: displaying the voltage parameter, the current parameter and the battery aging data on a display screen.

In order to achieve the above object, according to another aspect of the present invention, there is provided an aging detection device for a battery pack, which includes: a connection module, configured to establish a connection with The connection of the battery pack to be tested; the first acquisition module is used to obtain the preset charge and discharge parameters corresponding to the detection request; the test module is used to perform charge and discharge tests on the battery pack to be tested according to the preset charge and discharge parameters through the charge and discharge circuit; The acquisition module is used to collect voltage parameters and current parameters when the battery pack to be tested is charged and discharged; the determination module is used to determine battery aging data corresponding to the voltage parameters and current parameters.

Further, the aging detection device further includes: a second acquisition module, configured to acquire the model of the battery pack to be tested after receiving a detection request for detecting the aging degree of the battery pack to be tested; the first acquisition module further includes: a reading module, Used to read the preset charging and discharging parameters corresponding to the model.

Further, the test module also includes: a test sub-module, which is used to determine the charging test or discharge test of the battery pack to be tested through preset charging and discharging parameters; the first start-up module is used to control the simulation The switch connects the charging circuit and the charging circuit of the battery pack to be tested; the second start-up module is used to control the analog switch to connect the discharge circuit and the discharge circuit of the battery pack to be tested if the battery pack to be tested is charged and tested.

Further, the testing module further includes: a sending module, configured to send preset charging and discharging parameters to the battery pack management unit, and the battery pack management unit controls the charging and discharging of the battery pack to be tested.

Further, the aging detection device further includes: a display module, configured to display voltage parameters, current parameters and battery aging data on a display screen.

Using the above-mentioned embodiments of the present invention, the battery pack to be tested is connected to the aging detection device of the battery pack, and the determination module issues the charging and discharging parameters corresponding to the battery pack to be tested, so as to charge and discharge the battery pack to be tested, and collect the data of the battery pack to be tested. The voltage parameters and current parameters during charging and discharging of the battery pack are used to determine the aging degree of the battery pack under test. Among them, during the detection process, the acquisition module can measure the voltage parameters and current parameters of the battery pack under test in real time with high precision, and feed back the measurement results to the determination module, and the determination module determines the aging of the battery according to the voltage and current parameters. In the detection process, it is not necessary to fully charge and discharge the battery pack to be tested, shorten the detection time, and collect the voltage signal and current signal in real time, so that the accuracy of the collected current parameters is high, so that the determined battery The accuracy of aging data is high. The present invention solves the problem of slow detection of the aging degree of the battery in the prior art, and realizes the effect of rapidly and accurately detecting the aging degree of the battery pack.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a flowchart of a method for detecting aging of a battery pack according to an embodiment of the present invention;

2 is a flow chart of performing a charge and discharge test on a battery pack to be tested according to preset charge and discharge parameters through a charge and discharge circuit according to an embodiment of the present invention;

3 is a schematic diagram of an aging detection device for a battery pack according to an embodiment of the present invention;

4 is a schematic diagram of an optional aging detection device for a battery pack according to an embodiment of the present invention; and

Fig. 5 is a flow chart of testing a battery pack to be tested by an aging detection device using a battery pack according to an embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

Fig. 1 is a flowchart of an aging detection method for a battery pack according to an embodiment of the present invention. As shown in Fig. 1, the method includes the following steps:

Step S102, after receiving a detection request for detecting the aging degree of the battery pack to be tested, establishing a connection with the battery pack to be tested.

Step S104, acquiring preset charge and discharge parameters corresponding to the detection request.

Wherein, after step S102 is executed, the model of the connected battery pack to be tested is detected, and the charge and discharge parameters in step S104 are charge and discharge parameters corresponding to the model of the battery pack to be tested.

In step S106, a charging and discharging test is performed on the battery pack to be tested according to preset charging and discharging parameters through the charging and discharging circuit.

Step S108, collecting voltage parameters and current parameters when charging and discharging the battery pack to be tested.

Step S110, determining battery aging data corresponding to voltage parameters and current parameters.

Using the above-mentioned embodiments of the present invention, the battery pack to be tested is connected to the aging detection device of the battery pack, and the determination module issues the charging and discharging parameters corresponding to the battery pack to be tested, so as to charge and discharge the battery pack to be tested, and collect the data of the battery pack to be tested. The voltage parameters and current parameters during charging and discharging of the battery pack are used to determine the aging degree of the battery pack under test. Among them, during the detection process, the acquisition module can measure the voltage parameters and current parameters of the battery pack under test in real time with high precision, and feed back the measurement results to the determination module, and the determination module determines the aging of the battery according to the voltage and current parameters. In the detection process, it is not necessary to fully charge and discharge the battery pack to be tested, shorten the detection time, and collect the voltage signal and current signal in real time, so that the accuracy of the collected current parameters is high, so that the determined battery The accuracy of aging data is high. The present invention solves the problem of slow detection of the aging degree of the battery in the prior art, and realizes the effect of rapidly and accurately detecting the aging degree of the battery pack.

Wherein, in the above-mentioned embodiments of the present invention, step S102 may include, after receiving the detection request for detecting the aging degree of the battery pack to be tested: acquiring the model of the battery pack to be tested.

Specifically, when it is detected that the battery pack to be tested is connected, the model of the battery pack to be tested is compared with the model number of the pre-stored battery pack to obtain the model number of the battery pack to be tested. Wherein, the pre-stored battery pack model is a statistical result of the battery pack model.

In an optional embodiment of the present invention, step S104 of obtaining the preset charging and discharging parameters corresponding to the detection request may include: reading the preset charging and discharging parameters corresponding to the model.

Wherein, the preset charging and discharging parameters are pre-stored charging and discharging strategy parameters for different battery packs.

In another optional embodiment of the present invention, performing the charging and discharging test on the battery pack to be tested according to the preset charging and discharging parameters through the charging and discharging circuit in step S106 may also include: sending the preset charging and discharging parameters to the battery pack management unit, The charge and discharge of the battery pack to be tested is controlled by the battery pack management unit.

For example, when the battery pack to be tested is connected, in step S104, the corresponding preset charge and discharge parameters will be read according to the model of the battery pack to be tested, and then the read preset charge and discharge parameters will be sent to the battery pack management unit, The battery pack management unit controls the charge and discharge of the battery pack to be tested according to the received preset charge and discharge parameters.

Using the above-mentioned embodiment of the present invention, as shown in FIG. 2 , step S106 can be implemented through the following steps to carry out the charging and discharging test of the battery pack to be tested according to the preset charging and discharging parameters through the charging and discharging circuit:

In step S202, it is determined to perform a charging test or a discharging test on the battery pack to be tested through preset charging and discharging parameters.

Step S204, if the charging test is performed on the battery pack to be tested, the analog switch is controlled to connect the charging circuit and the charging circuit of the battery pack to be tested.

Step S206, if the battery pack to be tested is subjected to a discharge test, the analog switch is controlled to connect the discharge circuit and the discharge circuit of the battery pack to be tested.

Specifically, when the battery pack to be tested is connected, the model of the battery pack to be tested will be detected. The system will issue charging and discharging parameters according to the detected model of the battery pack to be tested. If the issued parameters received by the control analog switch are charging parameters, the control analog switch will connect the charging circuit and the charging circuit of the battery pack to be tested; The delivered parameters received by controlling the analog switch are discharge parameters, and the analog switch is controlled to connect the discharge circuit and the discharge circuit of the battery pack to be tested.

It should be further explained that it is not necessary to fully charge and discharge the battery pack to be tested when testing the battery pack to be tested, which shortens the detection time, and collects voltage parameters and current parameters in real time during the detection process, so that the collected voltage The accuracy of the parameters and current parameters is improved, so that the accuracy of the determined aging data of the battery pack to be tested is high.

According to the above embodiment, after determining the battery aging data corresponding to the voltage parameter and the current parameter in step S110, it may further include: displaying the voltage parameter, the current parameter and the battery aging data on the display screen.

It should be noted that the steps shown in the flowcharts of the accompanying drawings may be performed in a computer system, such as a set of computer-executable instructions, and that although a logical order is shown in the flowcharts, in some cases, The steps shown or described may be performed in an order different than here.

Fig. 3 is a schematic diagram of an aging detection device for a battery pack according to an embodiment of the present invention. The battery pack aging detection device includes: a connection module 12 , a first acquisition module 14 , a test module 13 , an acquisition module 4 and a determination module 15 .

Wherein, the connection module 12 is used to establish a connection with the battery pack to be tested after receiving a detection request for detecting the aging degree of the battery pack to be tested; the first acquisition module 14 is used to obtain preset charge and discharge parameters corresponding to the detection request; The test module 13 is used to carry out the charge and discharge test of the battery pack to be tested according to the preset charge and discharge parameters through the charge and discharge circuit; the acquisition module 4 is used to collect the voltage parameters and current parameters when the battery pack to be tested is charged and discharged; the determination module 15 is used to It is used to determine battery aging data corresponding to voltage parameters and current parameters.

Using the above-mentioned embodiments of the present invention, the connection between the battery pack to be tested and the aging detection device of the battery pack is established through the connection module, and the determination module issues the charging and discharging parameters corresponding to the battery pack to be tested acquired by the first acquisition module to pass the test. The module charges and discharges the battery pack to be tested, and uses the acquisition module to collect the voltage parameters and current parameters during charging and discharging of the battery pack to be tested, so as to determine the aging degree of the battery pack to be tested. Among them, during the detection process, the acquisition module can measure the voltage parameters and current parameters of the battery pack under test in real time with high precision, and feed back the measurement results to the determination module, and the determination module determines the aging of the battery according to the voltage and current parameters. In the detection process, it is not necessary to fully charge and discharge the battery pack to be tested, shorten the detection time, and collect the voltage signal and current signal in real time, so that the accuracy of the collected current parameters is high, so that the determined battery The accuracy of aging data is high. The present invention solves the problem of slow detection of the aging degree of the battery in the prior art, and realizes the effect of rapidly and accurately detecting the aging degree of the battery pack.

Specifically, when the system receives the detection request, the connection module connects the connection between the battery pack to be tested and the system; then the first acquisition module obtains the preset charge and discharge parameters corresponding to the detection request according to the model of the battery pack to be tested; the system After obtaining the charging and discharging parameters, the battery to be tested is detected according to the charging and discharging parameters; when the battery pack to be tested is detected, the acquisition module collects the voltage parameters and current parameters of the battery pack to be tested in real time; The current parameters and voltage parameters of the battery pack determine the aging degree of the battery pack under test.

It should be further explained that the connection module 12 in the above embodiment can be a connection line connected to the battery pack to be tested, but is not limited to the connection line, and can also be other connection devices, such as a charging and discharging box; the first acquisition module It is a sub-module of the communication module 7; the determination module 15 can be set in the main control unit 1, and the main control unit can adopt a TMS320F28335 type DSP, and the DSP is a kind of processor used for intensive calculation.

The acquisition module 4 in this embodiment can be a multimeter, an ammeter or a voltmeter. The battery parameters collected by the acquisition module are analog signals. After the module receives the analog signal, it performs filtering processing, converts the filtered analog signal into a digital signal, and then performs the next step of processing on the digital signal, such as , perform calculations, comparisons, or read corresponding data from the data table.

Wherein, the first obtaining module further includes: a reading module.

The above embodiment of the present invention will be described in detail below in conjunction with FIG. 4. FIG. 4 is a schematic diagram of an optional aging detection device for a battery pack according to an embodiment of the present invention. As shown in FIG. 4, the communication module 7 is used to transmit data, signals and Instructions, the reading module is a sub-module of the communication module, which is used to read the preset charging and discharging parameters corresponding to the model. Specifically, when the battery pack under test is connected to the connection module, the reading module is used to read the preset charge and discharge parameters issued by the determination module according to the model of the battery pack under test.

Among them, the communication module is used to realize the communication between the main control unit 1 and the battery management module 10, for example, it is used to read the relevant parameters of the battery pack to be tested and the determination module sends preset charging and discharging parameters, etc.

In the above embodiments, the aging detection device for the battery pack may further include a second acquisition module. As shown in FIG. 4 , the second obtaining module can also be a submodule of the communication module 7 , and is used to obtain the model of the battery pack to be tested after receiving a detection request for detecting the aging degree of the battery pack to be tested.

In this embodiment, the testing module further includes: a testing submodule, a first starting module and a second starting module.

Among them, the test sub-module is used to determine the charging test or discharge test of the battery pack to be tested through preset charging and discharging parameters; the first start-up module is used to control the analog switch to connect the charging circuit and The charging circuit of the battery pack to be tested; the second starting module is used to control the analog switch to connect the discharge circuit and the discharge circuit of the battery pack to be tested if the battery pack to be tested is charged and tested.

It should be further explained that the first start-up module in the above embodiment can use a Boost boost circuit, but it is not limited to using a Boost boost circuit. Other boost circuits can be used as required. The battery module shown in Figure 4 The voltage in 5 is raised, and the battery pack to be tested is charged with a constant current and constant voltage through the battery management module; the second startup module can use a push-pull forward circuit, but is not limited to a push-pull forward circuit, which is used to charge the battery pack to be tested The electric energy of the battery pack is converted into the electric energy of the battery module, that is, the battery pack to be tested is discharged; the test sub-module is controlled by the determination module, and is used to select the battery pack to be tested for charging or discharging according to the charge and discharge parameters issued by the determination module.

Among them, the Boost boost circuit is a switching DC boost circuit, which can make the output voltage higher than the input voltage; the push-pull forward circuit is used to reduce the output voltage of the battery pack to be tested and charge the battery module 5 .

According to the above-mentioned embodiment, the first start-up module 2 shown in FIG. 4 is connected to the main control unit 1, and is connected to the battery pack 11 to be tested through the test sub-module 6 and the sending module, for charging the battery pack 11 to be tested; The second starting module 3 is connected with the main control unit 1 and connected with the battery pack 11 to be tested through the test sub-module 6 and the sending module, and is used for discharging the battery pack 11 to be tested.

Specifically, after the determination module issues the aging degree detection instruction of the battery pack to be tested, the connection between the aging detection device of the battery pack and the battery pack to be tested is established, and the preset charging and discharging strategy corresponding to the model of the battery pack to be tested is obtained , send the preset charging and discharging parameters in the preset charging and discharging strategy to the test module, control the first starting module to charge the battery pack to be tested according to the preset charging and discharging parameters, and/or control the second starting module to be tested The battery pack is discharged.

In the above embodiment, the testing module may further include a sending module, configured to send preset charging and discharging parameters to the battery pack management unit, and the battery pack management unit controls the charging and discharging of the battery pack to be tested.

Wherein, the sending module is not shown in FIG. 4 , and the sending module is a sub-module of the testing sub-module 6 , and is used for charging and discharging the battery pack to be tested according to the charging and discharging parameters delivered by the determining module.

In the above embodiments, the battery pack aging detection device may further include a display module 8 for displaying voltage parameters, current parameters and battery aging data on a display screen. Specifically, the display module 8 may be a liquid crystal screen, but is not limited to a liquid crystal screen, and may also be a touch screen or other display devices for displaying the battery aging data collected by the collection module.

The above-mentioned embodiment of the present invention will be described in detail below in conjunction with FIG. 5. As shown in FIG. 5, the detection of the battery pack to be tested by using the aging detection device of the battery pack can be realized by the following method:

Step S502: Perform parameter calibration with a brand new battery pack of the same type as the battery pack to be tested.

Specifically, before performing the battery aging test on the battery pack to be tested, a brand new battery pack of the same model as the battery pack to be tested can be used for parameter calibration to obtain the rated voltage and rated current.

In this processing process, the above-mentioned brand-new battery pack used for calibration is connected to the aging detection device of the battery pack, and instructions can be input through the operation module 9, and then the determination module will select the model corresponding to the battery pack according to the instructions input by the operation module. The matching charge and discharge parameters, and the selected parameters and related information are transmitted to the display module 8 and displayed; under the control of the determination module, during the process of performing the charge and discharge of the new battery pack, the acquisition module 4 will collect the new battery pack. The battery aging data of the battery is then displayed on the display. At the same time, the raw battery aging data collected by the acquisition module will be processed by the determination module in real time. When the charging and discharging strategy is completed, the determination module will display the measured calibration result of the aging degree of the new battery pack through the display, and use it to calibrate the battery pack 11 to be tested.

Step S504: Connect the battery pack to be tested and initialize the whole system.

Specifically, the battery pack 11 to be tested is connected to the connection module 12 , and relevant instructions are input through the operation module 9 to initialize the battery management module 10 , the test module 13 , the communication module 7 , the collection module 4 and the display module 8 .

Step S506: sending out the detection command of the aging detector of the battery pack.

The determination module sends the preset charge and discharge parameters to the battery management module and the test module, and then the battery management module uses the preset charge and discharge strategy to perform charge and discharge operations on the battery pack to be tested according to the issued charge and discharge parameters. During the charging operation, the test submodule 6 connects the first starting module 2 to the system, and the storage battery module 5 charges the battery pack to be tested through the first starting module; during the discharging operation, the testing submodule 6 connects the second starting module 3 to the system , the battery pack to be tested charges the storage battery module 5 through the second starting module, that is, the battery pack to be tested is discharged. During charging and discharging operations, the acquisition module collects the voltage and current parameters of the battery pack to be tested, and feeds them back to the main control unit 1 for analysis of the aging degree of the battery pack to be tested.

Step S508: The aging degree of the battery pack to be tested is displayed.

The determination module processes the voltage parameters and current parameters of the battery pack to be tested collected by the acquisition module to display the aging data to the user through the display module 8 .

Among them, the charge and discharge strategy is pre-set and stored in the determination module. During use, the charge and discharge strategy can be added or deleted according to the needs; parameter calibration refers to the rated value measured by the standard instrument for this type of new battery pack. current and rated voltage, and use these parameters to calibrate other similar batteries; the expression method of battery aging can be expressed by a specific data list or by a graph; the operation module 9 is connected with the determination module, and is used to input the battery to be tested The instructions for group detection can be buttons or other input devices, such as a mouse; the storage battery module 5 can be a battery pack, but is not limited to a battery pack, or a storage battery, etc., and is mainly used for testing The battery pack provides power when charging, and is used to absorb the electric energy released by the battery pack under test when discharging.

Each module provided in this embodiment is the same as the usage method provided in the corresponding steps of the method embodiment, and the application scenarios may also be the same. Of course, it should be noted that the solutions involved in the above-mentioned modules are not limited to the content and scenarios in the above-mentioned first embodiment, and the above-mentioned modules can run on computer terminals or mobile terminals, and can be realized by software or hardware.

From the above description, it can be seen that the present invention achieves the following technical effects:

Using the above-mentioned embodiments of the present invention, the battery pack to be tested is connected to the aging detection device of the battery pack, and the determination module issues the charging and discharging parameters corresponding to the battery pack to be tested, so as to charge and discharge the battery pack to be tested, and collect the data of the battery pack to be tested. The voltage parameters and current parameters during charging and discharging of the battery pack are used to determine the aging degree of the battery pack under test. Among them, during the detection process, the acquisition module can measure the voltage parameters and current parameters of the battery pack under test in real time with high precision, and feed back the measurement results to the determination module, and the determination module determines the aging of the battery according to the voltage and current parameters. In the detection process, it is not necessary to fully charge and discharge the battery pack to be tested, shorten the detection time, and collect the voltage signal and current signal in real time, so that the accuracy of the collected current parameters is high, so that the determined battery The accuracy of aging data is high. The present invention solves the problem of slow detection of the aging degree of the battery in the prior art, and realizes the effect of rapidly and accurately detecting the aging degree of the battery pack.

The aging detector, the controller and the components constituting the processor of the battery pack to be protected by the present invention are all physical products with definite shape and structure and occupying a certain space. For example, DSP processors, data acquisition units, etc. are computer equipment, terminals or servers that can operate independently and have specific hardware structures.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A method for detecting aging of a battery pack, comprising: After receiving the detection request for detecting the aging degree of the battery pack under test, establishing a connection with the battery pack under test; Acquiring preset charge and discharge parameters corresponding to the detection request; performing a charge and discharge test on the battery pack to be tested according to the preset charge and discharge parameters through the charge and discharge circuit; Collecting voltage parameters and current parameters when performing charge and discharge tests on the battery pack to be tested; Determining battery aging data corresponding to the voltage parameter and the current parameter. 2. aging detection method according to claim 1, is characterized in that, After receiving the detection request for detecting the aging degree of the battery pack to be tested, the aging detection method further includes: acquiring the model of the battery pack to be tested; Acquiring the preset charging and discharging parameters corresponding to the detection request includes: reading the preset charging and discharging parameters corresponding to the model. 3. The aging detection method according to claim 1, wherein performing a charge and discharge test on the battery pack under test according to the preset charge and discharge parameters through the charge and discharge circuit comprises: determining to perform a charging test or a discharging test on the battery pack to be tested through the preset charging and discharging parameters; If the charging test is performed on the battery pack to be tested, the analog switch is controlled to connect the charging circuit and the charging circuit of the battery pack to be tested; If the discharge test is performed on the battery pack to be tested, the analog switch is controlled to connect the discharge circuit and the discharge circuit of the battery pack to be tested. 4. The aging detection method according to any one of claims 1 to 3, wherein performing a charge and discharge test on the battery pack to be tested according to the preset charge and discharge parameters through the charge and discharge circuit includes: The preset charging and discharging parameters are sent to the battery pack management unit, and the charging and discharging of the battery pack under test is controlled by the battery pack management unit. 5. The aging detection method according to any one of claims 1 to 3, wherein after determining the battery aging data corresponding to the voltage parameter and the current parameter, the aging detection method further comprises: The voltage parameter, the current parameter and the battery aging data are displayed on a display screen. 6. An aging detection device for a battery pack, comprising: A connection module, configured to establish a connection with the battery pack to be tested after receiving a detection request for detecting the aging degree of the battery pack to be tested; A first acquisition module, configured to acquire preset charge and discharge parameters corresponding to the detection request; A test module, configured to perform a charge and discharge test on the battery pack to be tested according to the preset charge and discharge parameters through the charge and discharge circuit; An acquisition module, configured to acquire voltage parameters and current parameters when performing charge and discharge tests on the battery pack to be tested; A determining module, configured to determine battery aging data corresponding to the voltage parameter and the current parameter. 7. The aging detection device according to claim 6, characterized in that, The aging detection device further includes: a second acquiring module, configured to acquire the model of the battery pack to be tested after receiving a detection request for detecting the aging degree of the battery pack to be tested; The first acquiring module further includes: a reading module, configured to read the preset charging and discharging parameters corresponding to the model. 8. The aging detection device according to claim 7, wherein the test module further comprises: A test submodule, configured to determine to perform a charging test or a discharging test on the battery pack to be tested through the preset charging and discharging parameters; The first starting module is used to control the analog switch to connect the charging circuit and the charging circuit of the battery pack under test if the battery pack under test is charged; The second start-up module is used to control the analog switch to connect the discharge circuit and the discharge circuit of the battery pack under test if the battery pack under test is to be charged. 9. The aging detection device according to any one of claims 6 to 8, wherein the test module further comprises: A sending module, configured to send the preset charging and discharging parameters to a battery pack management unit, and control the charging and discharging of the battery pack under test through the battery pack management unit. 10. The aging detection device according to any one of claims 6 to 8, wherein the aging detection device further comprises: A display module, configured to display the voltage parameter, the current parameter and the battery aging data on a display screen.