Battery impedance spectroscopy measuring equipment

Abstract

The utility model relates to the field of battery measurement, and discloses a battery impedance spectroscopy measuring device which comprises a shell, a sealing door, a heating carrying table, an electrochemical workstation, a charging and discharging device and a gas inlet and outlet assembly, the shell is provided with a testing bin, an opening communicated with the testing bin is formed in the shell, and the sealing door is used for opening or closing the opening; the heating carrying table is used for carrying and heating the battery, a first switch is arranged on a line between the electrochemical workstation and the first pole and / or the second pole, and a second switch is arranged on a line between the charging and discharging device and the first pole and / or the second pole. By arranging the shell with the test bin and the closing door capable of being opened and closed, the real working environment of the battery is simulated in combination with the integrated heating carrying table in the test bin, the electrochemical work station is matched with the charging and discharging device, and the first switch and the second switch are used for respectively controlling the on-off of circuits of the electrochemical work station and the charging and discharging device; in-situ switching of battery charging and discharging test and impedance spectroscopy measurement in a closed constant-temperature environment is realized.

Description

Technical Field

[0001] The present application relates to the field of battery testing, and in particular to a battery impedance spectrum measuring device. Background Art

[0002] With the rapid development of new energy technologies, thin-film solid-state batteries have become a key research area in the energy storage field due to their high energy density and excellent safety performance. In battery R&D and performance evaluation, electrochemical impedance spectroscopy, as a non-destructive testing method, can effectively reflect the internal interface characteristics and charge transfer processes of the battery, playing a key role in optimizing battery structure and improving performance.

[0003] However, existing impedance measurement technologies struggle to meet the practical testing needs of thin-film solid-state batteries. A core issue lies in the inability to achieve real-time, in-situ measurements while the battery is operating. Traditional methods require removing the battery from its operating environment for offline testing, resulting in significant differences between the measurement environment and actual operating conditions, making it impossible to accurately capture the impedance variations during dynamic operation. Frequent loading and unloading operations can not only damage the delicate structure of thin-film batteries but also introduce human interference, compromising the reliability of measurement results. Utility Model Content

[0004] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and provide a battery impedance spectrum measurement device.

[0005] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0006] This application provides:

[0007] A battery impedance spectrum measuring device, comprising:

[0008] A shell having a test chamber, an opening communicating with the test chamber, and an air inlet and outlet assembly;

[0009] A closing door, which is arranged at the opening position and is used to open or close the opening;

[0010] A heating platform, which is disposed in the test chamber and is used to carry and heat the battery;

[0011] an electrochemical workstation, the electrochemical workstation being located between the first electrode and the second electrode of the battery and connected to the first electrode and the second electrode, and a first switch being provided on the line between the electrochemical workstation and the first electrode and / or the second electrode;

[0012] A charging and discharging device is located between the first pole and the second pole of the battery, and the charging and discharging device is connected to the first pole and the second pole. A second switch is provided on the line between the charging and discharging device and the first pole and / or the second pole.

[0013] Furthermore, the inlet and outlet gas assembly is connected to the test chamber, and the inlet and outlet gas assembly provides a gas atmosphere for battery impedance spectrum measurement. The inlet and outlet gas assembly includes a first pipeline and a second pipeline connected to the test chamber, and a flow valve is installed on the first pipeline and / or the second pipeline.

[0014] Furthermore, the battery impedance spectrum measuring equipment also includes a probe, the probe including a first needle body connected to the first pole, and a second needle body connected to the second pole; the electrochemical workstation has a first end and a second end, the first end is connected to the first needle body, and the second end is connected to the second needle body; the charging and discharging device has a third end and a fourth end, the third end is connected to the first needle body, and the fourth end is connected to the second needle body.

[0015] Furthermore, the first needle body and the second needle body are both arranged on the corresponding mounting assembly, and the mounting assembly includes a threaded column, an elastic part is sleeved on the threaded column, and a screw part is also installed on the threaded column, and the first needle body and the second needle body are arranged between the elastic part and the screw part corresponding to their positions.

[0016] Furthermore, the first needle body includes a mounting portion, an adjustment slot is provided on the mounting portion, the adjustment slot is arranged on the corresponding threaded column, an abutment portion is provided at the end of the mounting portion, and a first connecting portion and a second connecting portion are provided at the end of the mounting portion away from the abutment portion.

[0017] Furthermore, a mounting seat is provided inside the test chamber, the heating platform is provided on the mounting seat, the mounting seat includes a positioning column fixedly provided on the inner bottom wall of the test chamber, a heat insulation plate is slidably provided on the positioning column, a through hole adapted to the positioning column is opened on the heat insulation plate, and the positioning column is passed through the through hole.

[0018] Furthermore, a positioning hole is provided on the side of the heating platform facing the heat insulation plate, and the positioning column passes through the through hole and extends to the positioning hole.

[0019] Furthermore, a sealing assembly is provided at the opening position, and the sealing assembly includes a first sealing groove provided on the side of the opening facing the closed door, and a second sealing groove is provided on the side of the closed door facing the shell, and a sealing component is provided in the first sealing groove or the second sealing groove.

[0020] Furthermore, an observation window is provided on the closed door.

[0021] Furthermore, a temperature sensor and a humidity sensor are provided in the test chamber.

[0022] This application forms a closed environment for battery measurement by providing a shell with a test chamber and an openable and closable closed door, and combines the integrated heating platform in the test chamber to simulate the real working environment of the battery. On the basis of connecting the electrochemical workstation and the charging and discharging device to the battery, the first switch and the second switch are used to respectively control the circuit on and off of the electrochemical workstation and the charging and discharging device, so as to realize in-situ switching of battery charging and discharging test and impedance spectrum measurement in a closed constant temperature environment, avoiding the damage to the film structure and the difference in test environment caused by battery loading and unloading in traditional methods, and filling the protective gas through the air inlet and outlet components to prevent other gases in the air from reacting with the battery and affecting the measurement results, thereby ensuring the accuracy of the impedance measurement results.

[0023] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It shows a schematic diagram of the overall structure of the device of the present application when the opening is open;

[0026] Figure 2 It shows a schematic diagram of the overall structure of the device of the present application when the opening is closed;

[0027] Figure 3 It shows a schematic structural diagram of the battery of the present application when it is connected to an electrochemical workstation and a charging and discharging device;

[0028] Figure 4 Shows a schematic diagram of the cross-sectional structure of the device of this application;

[0029] Figure 5 A schematic diagram of the structure of the heating platform, mounting base, probe and mounting assembly in the exploded state is shown;

[0030] Figure 6 It shows a schematic diagram of the first needle structure of the present application;

[0031] Figure 7Shows this application Figure 1 Enlarged structural diagram at point A in the middle.

[0032] Description of main component symbols:

[0033] 100-shell; 110-opening; 120-air inlet and outlet components; 121-first pipeline; 122-second pipeline; 200-closed door; 210-observation window; 300-heating platform; 400-electrochemical workstation; 410-first switch; 500-charging and discharging device; 510-second switch; 600-probe; 610-first needle body; 611-mounting part; 6111-adjusting groove; 612-abutting part; 613-first connecting part; 614-second connecting part; 620-second needle body; 700-mounting assembly; 710-threaded column; 720-elastic part; 730-screwing part; 800-mounting seat; 810-positioning column; 820-thermal insulation board; 830-through hole; 900-sealing assembly; 910-first sealing groove; 920-second sealing groove; 930-sealing part; a-battery. DETAILED DESCRIPTION

[0034] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0037] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0038] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0039] The present application provides a battery impedance spectrum measurement device, which includes a housing 100 , a closed door 200 , a heating platform 300 , an electrochemical workstation 400 , and a charge-discharge device 500 .

[0040] In some specific embodiments, the shell 100 has a test chamber, an opening 110 connected to the test chamber is provided on the shell 100, an air inlet and outlet assembly 120 is also provided on the shell 100, a closed door 200 is provided at the position of the opening 110, and the closed door 200 is used to open or close the opening 110, a heating platform 300 is provided in the test chamber, and the heating platform 300 is used to support and heat the battery, the electrochemical workstation 400 is located between the first pole and the second pole of the battery, and the electrochemical workstation 400 is connected to the first pole and the second pole, and a first switch 410 is provided on the line between the electrochemical workstation 400 and the first pole and / or the second pole, the charging and discharging device 500 is located between the first pole and the second pole of the battery, and the charging and discharging device 500 is connected to the first pole and the second pole, and a second switch 510 is provided on the line between the charging and discharging device 500 and the first pole and / or the second pole.

[0041] See Figure 1 、 Figure 2 as well as Figure 3As shown, when battery a needs to be tested, the opening 110 can first be opened through the closed door 200, and the battery can be placed on the heating platform 300. Next, the closed door 200 closes the opening 110. During the test, the first switch 410 can be used to disconnect the electrochemical workstation 400 from the battery, and the second switch 510 can be activated to connect the charge and discharge device 500 to the battery to form a loop to perform a charge and discharge test on the battery. When the impedance spectrum of the battery needs to be measured, the second switch 510 can be used to disconnect the charge and discharge device 500 from the battery, and the first switch 410 can be used to connect the electrochemical workstation 400 to the battery to form a loop to measure the impedance spectrum of the battery. It can be understood that during the entire process, there is no need to manually connect the electrochemical workstation 400 to the battery or the charge and discharge device 500 to the battery, and everything is completed automatically.

[0042] In this embodiment, in order to prevent the battery from contacting the heating platform 300 and causing a short circuit, a high-temperature resistant insulating layer can be provided on the carrying surface of the heating platform 300. For example, a layer of high-temperature resistant insulating paint can be coated on the carrying surface of the heating platform 300 to achieve insulation.

[0043] In this embodiment, the battery further has a substrate (not shown in the figure), which can be made of materials such as quartz, glass, silicon wafer, polyimide, etc. The specific material is not limited here and can be selected and used according to actual conditions.

[0044] For example, the first switch 410 and the second switch 510 may both use relays to connect or disconnect the circuit.

[0045] In one embodiment, the first switch 410 is provided on the line between the electrochemical workstation 400 and the first pole, or the first switch 410 is provided on the line between the electrochemical workstation 400 and the second pole, or the first switch 410 is provided on both the circuit between the electrochemical workstation 400 and the first pole and the line between the electrochemical workstation 400 and the second pole. In this embodiment, the first switch 410 is provided on the line between the electrochemical workstation 400 and the first pole, that is, the first switch 410 is provided on the line connecting the electrochemical workstation 400 and the positive pole of the battery.

[0046] In one embodiment, the second switch 510 is provided on the circuit between the charging and discharging device 500 and the first pole, or the second switch 510 is provided on the circuit between the charging and discharging device 500 and the second pole, or the second switch 510 is provided on both the circuit between the charging and discharging device 500 and the first pole and the circuit between the charging and discharging device 500 and the second pole. In this embodiment, the second switch 510 is provided on the circuit between the charging and discharging device 500 and the first pole, that is, the second switch 510 is provided on the circuit connecting the charging and discharging device 500 and the positive pole of the battery.

[0047] In this embodiment, the first electrode is the positive electrode of the battery, and the second electrode is the negative electrode of the battery.

[0048] The electrochemical workstation 400 mentioned above is mainly used to detect the impedance of the battery to generate an impedance spectrum, and the charge and discharge device 500 is mainly used to perform charge and discharge tests on the battery. The electrochemical workstation 400 and the charge and discharge device 500 are devices commonly used by those skilled in the art, and their specific structures are not elaborated here.

[0049] In this embodiment, the heating platform 300 has a corresponding electric heating element, for example, the electric heating element can be an electric heating wire, which heats the battery by converting electrical energy into thermal energy to increase the temperature of the heating platform 300, thereby simulating the temperature of the battery during actual use. Furthermore, in order to accurately control the temperature, a corresponding sensor should be set on the heating platform 300 to monitor the temperature changes in real time and adjust the temperature of the heating platform 300 according to the monitored temperature.

[0050] In some specific embodiments, the inlet and outlet gas assembly 120 is connected to the test chamber, and the inlet and outlet gas assembly 120 provides a gas atmosphere for the battery impedance spectrum measurement. The inlet and outlet gas assembly 120 includes a first pipeline 121 and a second pipeline 122 connected to the test chamber, and a flow valve is installed on the first pipeline 121 and / or the second pipeline 122.

[0051] In this embodiment, a gas that is not easy to react is introduced into the test chamber through the air inlet and outlet assembly 120, for example, high-purity argon or nitrogen is introduced into the test chamber, thereby establishing a protective gas environment in the test chamber to prevent the battery from reacting with oxygen in the air during measurement and affecting the measurement data. Specifically, the first pipeline 121 mentioned above is the air inlet pipe, and the second pipeline 122 is the air outlet pipe. The first pipeline 121 is connected to a suitable air source and air pump, etc., so as to realize the input of gas into the test chamber.

[0052] See Figure 1 and Figure 2 As shown, the gas enters the test chamber through the first pipeline 121 and is discharged from the test chamber through the second pipeline 122, thereby achieving gas atmosphere adjustment in the test chamber.

[0053] To further precisely control the gas environment in the test chamber, a flow valve is installed on first pipeline 121, second pipeline 122, or both. The specific installation locations of the flow valves are not limited here. It is understood that the primary function of the flow valve is to detect the amount of gas flow, thereby precisely controlling the amount of gas entering the test chamber and ensuring that the gas environment in the test chamber meets preset conditions.

[0054] In some specific embodiments, the battery impedance spectrum measurement equipment also includes a probe 600, the probe 600 includes a first needle body 610 connected to the first pole, and a second needle body 620 connected to the second pole, the electrochemical workstation 400 has a first end and a second end, the first end is connected to the first needle body 610, and the second end is connected to the second needle body 620; the charging and discharging device 500 has a third end and a fourth end, the third end is connected to the first needle body 610, and the fourth end is connected to the second needle body 620.

[0055] The first end is the positive terminal of the electrochemical workstation 400, the second end is the negative terminal of the electrochemical workstation 400, the third end is the positive terminal of the charge-discharge device 500, and the fourth end is the negative terminal of the charge-discharge device 500.

[0056] In this embodiment, in order to enable the electrochemical workstation 400 and the charge-discharge device 500 to be connected to the battery, a first needle body 610 and a second needle body 620 are respectively arranged on both sides of the heating carrier 300, that is, the electrochemical workstation 400 and the charge-discharge device 500 are connected to the battery through the first needle body 610 and the second needle body 620 as the connection medium. It can be understood that the first needle body 610 and the second needle body 620 are both in abutment contact with the battery, so that impedance measurement of different batteries can be performed.

[0057] In some specific embodiments, the first needle body 610 and the second needle body 620 are both arranged on the corresponding mounting assembly 700, and the mounting assembly 700 includes a threaded column 710, an elastic member 720 is sleeved on the threaded column 710, and a screw member 730 is also installed on the threaded column 710. The first needle body 610 and the second needle body 620 are arranged between the elastic member 720 and the screw member 730 corresponding to their positions.

[0058] See also Figure 4 and Figure 5As shown, the screw member 730 is a nut and the elastic member 720 is a spring. In order to enable the installation of the first needle body 610 and the second needle body 620, two mounting assemblies 700 are set on the inner bottom wall of the test chamber to achieve the connection between the first needle body 610 and the second needle body 620. Specifically, the first needle body 610 and the second needle body 620 are respectively mounted on the threaded column 710 corresponding to their positions, and are both located between the elastic member 720 and the screw member 730. Therefore, it can be seen that when it is necessary to measure the battery, it is only necessary to rotate the screw member 730 to drive the first needle body 610 and the second needle body 620 at their corresponding positions to move downward to contact the battery to achieve electrical connection.

[0059] In this embodiment, the first needle body 610 and the second needle body 620 have the same structure, and the first needle body 610 and the second needle body 620 are used in the same way. The first needle body 610 is taken as an example here. Specifically, the first needle body 610 includes a mounting portion 611, and an adjustment groove 6111 is provided on the mounting portion 611. The adjustment groove 6111 is arranged on the corresponding threaded column 710. The end of the mounting portion 611 is provided with an abutting portion 612, and the end of the mounting portion 611 away from the abutting portion 612 is provided with a first connecting portion 613 and a second connecting portion 614.

[0060] See Figure 5 and Figure 6 As shown, in the initial state, the adjustment groove 6111 is sleeved in the threaded column 710, and at this time is located between the elastic member 720 and the screw member 730. In order to enable the abutting portion 612 to be electrically connected to the first pole of the battery, the screw member 730 is rotated to drive the mounting portion 611 to move downward, so that the abutting portion 612 is in contact with the first pole of the battery to complete the electrical connection. Furthermore, in order to enable the mounting portion 611 to be connected to the electrochemical workstation 400 and the first end and the third end of the charge and discharge device 500, a first connecting portion 613 and a second connecting portion 614 are provided at the end of the mounting portion 611 away from the abutting portion 612. Specifically, the first connecting portion 613 can be connected to the first end driven by the electrochemical workstation 400, and the second connecting portion 614 is connected to the second end of the charge and discharge device 500. Furthermore, since the first needle body 610 and the second needle body 620 have the same structure and usage method, the process of connecting the second needle body 620 to the second pole of the battery will not be elaborated here. Specifically, the second end of the electrochemical workstation 400 and the fourth end of the charging and discharging device 500 are connected to the second needle body 620.

[0061] In this embodiment, in order to prevent the first needle body 610 and the second needle body 620 from contacting the mounting assembly 700 at their corresponding positions and causing a short circuit, the first needle body 610 and the second needle body 620 can be coated with an insulating layer on the outer surface of the mounting portion 611 at their positions, thereby preventing electricity from the battery from being conducted to the threaded column 710, the elastic member 720 and the screw member 730. It should be noted that the portion of the abutment portion 612 that contacts the battery is not coated with an insulating layer, and the first connecting portion 613 and the second connecting portion 614 are also not coated with an insulating layer, thereby achieving current conduction from the battery. Furthermore, in order to further improve the insulation's ability to prevent short circuits, an insulating layer can also be coated on the surface of the threaded column 710, the elastic member 720 and the screw member 730 to improve the insulation capability. In this embodiment, the insulating layer can be an insulating varnish, specifically a high-temperature resistant insulating varnish.

[0062] In some specific embodiments, a mounting base 800 is provided inside the test chamber, and the heating platform 300 is provided on the mounting base 800. The mounting base 800 includes a positioning column 810 fixedly provided on the inner bottom wall of the test chamber, and a heat insulation plate 820 is slidably provided on the positioning column 810. The heat insulation plate 820 is provided with a through hole 830 adapted to the positioning column 810, and the positioning column 810 is passed through the through hole 830.

[0063] In this embodiment, since the heating platform 300 heats and transfers heat to the battery, thereby simulating the temperature of the actual use of the battery, in order to prevent the temperature from being transferred to the shell 100, a mounting seat 800 is set at the bottom of the heating platform 300 for heat insulation. Specifically, in order to be able to position the heat insulation plate 820, a through hole 830 is opened on the heat insulation plate 820, and the positioning column 810 is passed through the through hole 830 to realize the positioning of the heat insulation plate 820. Specifically, there are four positioning columns 810 and four through holes 830 and they are distributed along a rectangle.

[0064] In some specific embodiments, in order to prevent the heating platform 300 from moving, a positioning hole is provided on the side of the heating platform 300 facing the heat insulation plate 820 , and the positioning column 810 passes through the through hole 830 and extends to the positioning hole (not shown).

[0065] In this embodiment, the positioning hole is a blind hole, that is, the positioning hole does not pass through the heating stage 300 .

[0066] In some specific embodiments, a sealing assembly 900 is provided at the opening 110, and the sealing assembly 900 includes a first sealing groove 910 provided on the side of the opening 110 facing the closed door 200, and a second sealing groove 920 is provided on the side of the closed door 200 facing the shell 100, and a sealing member 930 is provided in the first sealing groove 910 or the second sealing groove 920.

[0067] See also Figure 7 As shown, in order to prevent the gas in the test chamber from overflowing from the connection position between the closed door 200 and the shell 100, a sealing assembly 900 is provided at the connection position between the two to prevent the gas from overflowing. Specifically, when the closed door 200 closes the opening 110, the sealing member 930 is deformed by the force, so that it is tightly attached to the inner wall of the first sealing groove 910 and the sealing member 930 to achieve a sealing effect.

[0068] In this embodiment, the second sealing groove 920 can be disposed in the first sealing groove 910 or in the second sealing groove 920 , and the specific location of the arrangement is not limited here.

[0069] Exemplarily, the sealing member 930 is a sealing ring, and specifically a rubber sealing ring can be selected.

[0070] In some specific embodiments, in order to be able to see through the situation inside the test chamber, an observation window 210 is provided on the closed door 200 for easy observation by human eyes.

[0071] In some specific embodiments, in order to simulate the ambient temperature and humidity during actual use of the battery, a temperature sensor and a humidity sensor are set in the test chamber. The temperature and humidity can be achieved by the temperature and humidity of the gas introduced into the test chamber. Specifically, a display screen can be set on the closed door 200 to display the temperature and humidity in the test chamber in real time.

[0072] Specifically, the present application should also include corresponding electronic components such as corresponding processors and memories, which control the temperature of the heating platform 300, control the start and stop of the first switch 410 and the second switch 510, and process the data collected by the temperature sensor and the humidity sensor, and display the processed temperature and humidity on the display screen. It can also control the temperature and humidity of the gas entering the test chamber by controlling other components.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0074] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery impedance spectrum measuring device, characterized in that: include: A shell (100), the shell (100) having a test chamber, the shell (100) being provided with an opening (110) communicating with the test chamber, and the shell (100) being further provided with an air inlet and outlet assembly (120); A closed door (200), the closed door (200) being arranged at the position of the opening (110), and the closed door (200) being used to open or close the opening (110); A heating platform (300), the heating platform (300) being arranged in the test chamber, and the heating platform (300) being used to carry and heat the battery; An electrochemical workstation (400), the electrochemical workstation (400) being located between a first pole and a second pole of a battery, the electrochemical workstation (400) being connected to the first pole and the second pole, and a first switch (410) being provided on a line between the electrochemical workstation (400) and the first pole and / or the second pole; A charging and discharging device (500) is located between a first pole and a second pole of a battery, and the charging and discharging device (500) is connected to the first pole and the second pole, and a second switch (510) is provided on the line between the charging and discharging device (500) and the first pole and / or the second pole.

2. The battery impedance spectrum measuring device according to claim 1, characterized in that: The inlet and outlet gas assembly (120) is in communication with the test chamber, and the inlet and outlet gas assembly (120) provides a gas atmosphere for battery impedance spectrum measurement. The inlet and outlet gas assembly (120) comprises a first pipeline (121) and a second pipeline (122) in communication with the test chamber, and a flow valve is installed on the first pipeline (121) and / or the second pipeline (122).

3. The battery impedance spectrum measuring device according to claim 1, characterized in that: The battery impedance spectrum measuring device further includes a probe (600), wherein the probe (600) includes a first needle body (610) connected to the first pole and a second needle body (620) connected to the second pole; the electrochemical workstation (400) has a first end and a second end, wherein the first end is connected to the first needle body (610) and the second end is connected to the second needle body (620); and the charging and discharging device (500) has a third end and a fourth end, wherein the third end is connected to the first needle body (610) and the fourth end is connected to the second needle body (620).

4. The battery impedance spectrum measuring device according to claim 3, characterized in that: The first needle body (610) and the second needle body (620) are both arranged on a corresponding mounting assembly (700). The mounting assembly (700) includes a threaded column (710), an elastic member (720) is sleeved on the threaded column (710), and a screwing member (730) is also installed on the threaded column (710). The first needle body (610) and the second needle body (620) are arranged between the elastic member (720) and the screwing member (730) at corresponding positions.

5. The battery impedance spectrum measuring device according to claim 4, characterized in that: The first needle body (610) includes a mounting portion (611), an adjusting groove (6111) is provided on the mounting portion (611), and the adjusting groove (6111) is arranged on the corresponding threaded column (710), an abutting portion (612) is provided at the end of the mounting portion (611), and a first connecting portion (613) and a second connecting portion (614) are provided at the end of the mounting portion (611) away from the abutting portion (612).

6. The battery impedance spectrum measuring device according to claim 1, characterized in that: A mounting seat (800) is provided inside the test chamber, the heating platform (300) is provided on the mounting seat (800), the mounting seat (800) includes a positioning column (810) fixedly provided on the inner bottom wall of the test chamber, a heat insulation plate (820) is slidably provided on the positioning column (810), a through hole (830) adapted to the positioning column (810) is opened on the heat insulation plate (820), and the positioning column (810) is passed through the through hole (830).

7. The battery impedance spectrum measuring device according to claim 6, characterized in that: A positioning hole is provided on the side of the heating platform (300) facing the heat insulation plate (820), and the positioning column (810) passes through the through hole (830) and extends to the positioning hole.

8. The battery impedance spectrum measuring device according to claim 1, characterized in that: A sealing assembly (900) is provided at the position of the opening (110), the sealing assembly (900) comprising a first sealing groove (910) provided on the side of the opening (110) facing the closed door (200), a second sealing groove (920) provided on the side of the closed door (200) facing the shell (100), and a sealing member (930) provided in the first sealing groove (910) or the second sealing groove (920).

9. The battery impedance spectrum measuring device according to claim 1, characterized in that: An observation window (210) is provided on the closed door (200).

10. The battery impedance spectrum measuring device according to claim 1, characterized in that: The test chamber is provided with a temperature sensor and a humidity sensor.

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