In-situ neutron scattering battery device suitable for electrode heating

Abstract

The utility model provides an in-situ neutron scattering battery device suitable for electrode heating, which comprises a conductive shell, a heating element capable of heating an electrode and a temperature measuring element capable of monitoring the temperature of the electrode in real time are arranged in the conductive shell, one end of the conductive shell is provided with a fixed adapter, and the other end of the conductive shell is provided with a temperature measuring element. And a first shielding piece and a second shielding piece are respectively arranged at two ends of the conductive shell. According to the utility model, the heating element and the temperature measuring element are utilized to carry out heating temperature precision control on the electrode under the condition that an in-situ neutron scattering experiment is not influenced, so that the possible problem of temperature gradient in a traditional experiment is avoided; by arranging the first shielding piece and the second shielding piece, background signals in neutron scattering are isolated and reduced, and the test accuracy of the in-situ neutron scattering experiment of the electrode can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery test technical field especially relates to a kind of in-situ neutron scattering battery device suitable for electrode heating. BACKGROUND

[0002] The rapid development of current new energy industry, the requirement of battery performance is also constantly improving. Solid-state battery and conventional lithium-ion battery as the key technology of new generation energy storage device, have wide application in electric vehicle, portable electronic equipment and energy storage power station etc. However, solid-state battery and lithium-ion battery involve complex physical and chemical processes during charging and discharging, especially the dynamic processes such as ion transport, structure change and phase change at the interface of electrode and electrolyte. Understanding these processes is crucial to improve battery performance, prolong life and ensure its safety. Therefore, in-situ characterization technology for battery internal structure and dynamics has become the core tool for studying battery performance. Therefore, it becomes a problem to be solved that the change of battery internal microstructure can be monitored under actual working conditions.

[0003] Under this background, the battery technology suitable for in-situ neutron scattering experiment gradually becomes the front development direction of battery research. In order to better understand these internal processes, researchers gradually turn their attention to in-situ neutron scattering technology, which can obtain key microstructure information by real-time observation of battery. In-situ neutron scattering technology is valued in battery research mainly because of its unique penetration ability and high sensitivity to light elements. Compared with X-ray scattering technology, neutron scattering can detect light elements such as hydrogen and lithium more sensitively, so that researchers can clearly observe the distribution and dynamic change of light elements in electrode material and electrolyte. This is of great significance to the study of internal reaction mechanism of battery, especially the structure change, ion migration and electrolyte degradation of solid-state battery and conventional lithium-ion battery.

[0004] The limitation of traditional neutron scattering experiment in battery application lies in the deficiency of experimental temperature control, especially the temperature control of electrode. In actual working environment, the performance and structure of electrode material are often significantly affected by temperature, for example, the structure of electrode material may change at high temperature, and the occurrence of side reactions is accelerated. Therefore, to truly simulate the electrode behavior under actual working conditions, especially the performance under high temperature environment, it is particularly important to control the temperature of electrode in experiment. However, traditional in-situ neutron scattering experimental device has many limitations in simulating battery working environment, especially in heating process, temperature control and adapting to solid-state battery, which limits the accurate observation of internal evolution process of battery under actual working conditions.

[0005] The prior art implements temperature regulation on the whole battery by adopting a heating mode of heating the whole battery, which will inevitably affect the structural performance change of the whole battery, including the electrode, electrolyte and various side reactions to be researched, and the electrode in a single research system cannot be independently implemented temperature regulation and change. Utility model content

[0006] The technical problem to be solved by the utility model is how to heat the battery electrode to realize in-situ neutron scattering experiment testing.

[0007] The utility model discloses a technical scheme as follows to solve the above technical problems:

[0008] The utility model provides a kind of in-situ neutron scattering battery device suitable for electrode heating, including electrically conductive shell, the electrically conductive shell inside is equipped with the heating piece that can heat electrode and the temperature measuring piece that can carry out real-time monitoring temperature to electrode, the electrically conductive shell one end is provided fixed adapter, and first shielding and second shielding are set respectively in the both ends of electrically conductive shell.

[0009] Beneficial effect: the utility model utilizes heating piece and temperature measuring piece to be able to heat electrode temperature precision control without affecting in-situ neutron scattering experiment, to avoid the temperature gradient problem that can exist in traditional experiment;By setting first shielding and second shielding, background signal in neutron scattering is isolated and reduced, and the accuracy of electrode in-situ neutron scattering experiment testing can be achieved.

[0010] The electrically conductive shell material of the utility model includes metal aluminum, metal vanadium or titanium zirconium alloy, these materials have good mechanical properties, and can reduce the interference of background signal on in-situ neutron scattering experiment, to ensure the accuracy of in-situ neutron scattering experiment result.

[0011] Preferably, the heating piece includes an electrically conductive cylinder and a heating rod, and the electrically conductive cylinder is connected with the heating rod.

[0012] Preferably, the heating piece includes an electrically conductive cylinder and an electric heating wire, and the electric heating wire is wound on the surface of the electrically conductive cylinder.

[0013] Preferably, the temperature measuring piece includes an electrically conductive cylinder and a temperature measuring element, and the electrically conductive cylinder is connected with the temperature measuring element.

[0014] Beneficial effect: the utility model can sensitively detect the real-time temperature of electrode by temperature measuring piece and heating piece, so that the temperature precision range is controlled within ±0.5℃, high-precision control of electrode temperature environment field is achieved, and control of electrode in different temperature environment field is realized.

[0015] Preferably, the temperature measuring element is a platinum thermal temperature sensor.

[0016] Preferably, the heating element and the temperature measuring element are fixed in the conductive shell by compression nuts.

[0017] Beneficial effects: the utility model discloses a heating element and temperature measuring element are fixed in the conductive shell, in order to provide sealed environment for the electrode, uses the compression nut and fixes the guarantee that heating element and temperature measuring element can be closely contacted with the electrode, guarantees that the electrode can normally charge and discharge.

[0018] Preferably, the first shielding element and the second shielding element are connected on the outer surface of the conductive shell by threads.

[0019] Preferably, the temperature measuring element is fixed in the conductive shell by the second compression nut, and the fixed adapter is fixed at one end of the conductive shell by thread connection with the second compression nut.

[0020] Preferably, the first shielding element is sleeved on the fixed adapter and is fixed at one end of the conductive shell by thread connection with the second compression nut.

[0021] Preferably, the compression nut is made of insulating material.

[0022] The utility model discloses the advantages are:

[0023] The in-situ neutron scattering battery device of the utility model has remarkable effect in improving experimental accuracy, can seal the electrode in the conductive shell while guaranteeing electrode heating, can play the role of good temperature transmission, can also avoid the interference of atmosphere change on the heating element, can minimize temperature drift and environmental noise, guarantee high-precision collection of experimental data, through the heating mode, researchers can observe the structural change and chemical reaction process in the battery under different temperatures in real time, obtain the structural information of material in high-temperature environment, phase change behavior and thermal expansion characteristics, thereby providing data support for battery material modification, thermal management technology and thermal runaway protection measures. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 It is the overall schematic view of the in-situ neutron scattering battery device suitable for electrode heating in the embodiment;

[0025] Fig. 2 It is the sectional view schematic diagram of the in-situ neutron scattering battery device suitable for electrode heating in the embodiment. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0027] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the indicated device or element to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model; in addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. It should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] According to Figs. 1-2 The embodiment provides an in-situ neutron scattering cell device suitable for electrode heating, which comprises a conductive shell 10, a heating piece 101 capable of heating the electrode and a temperature measuring piece 102 capable of monitoring the temperature of the electrode in real time are arranged in the conductive shell 10, and a fixed adapter 13 is arranged at one end of the conductive shell 10, and a first shielding piece 11 and a second shielding piece 12 are arranged at both ends of the conductive shell 10 respectively.

[0029] The embodiment utilizes the heating piece 101 and the temperature measuring piece 102 to control the heating temperature of the electrode without affecting the in-situ neutron scattering experiment, so that the temperature gradient problem that may exist in the traditional experiment is avoided; the first shielding piece 11 and the second shielding piece 12 are arranged to isolate and reduce the background signal in neutron scattering, so that the in-situ neutron scattering experiment test accuracy of the electrode can be achieved; the fixed adapter 13 is fixed with the light source base, so that the electrode can stably perform the in-situ neutron scattering experiment test.

[0030] The conductive shell 10 needs to meet the conditions of not being easily activated under the background of neutron scattering in order to be able to carry out in-situ neutron scattering experiment conditions, so the material selection of the conductive shell 10 includes metal aluminum, metal vanadium and titanium-zirconium alloy. These materials have good mechanical properties and can reduce the interference of background signal on in-situ neutron scattering experiment, and can ensure the accuracy of in-situ neutron scattering experiment results.

[0031] The heating element 101 of the embodiment includes a conductive column and an electric heating wire. The heating element 101 is formed by winding the electric heating wire on the surface of the conductive column. The heating element 101 is connected to the temperature control box through the heating wire to adjust the temperature of the heating element 101. The heating element 101 is fixed at one end of the conductive shell 10 through the first compression nut 14. The end of the heating element 101 is fixed through the third compression nut 15, and the connector of the heating element 101 is arranged outside the third compression nut 15.

[0032] The temperature measuring element 102 includes a conductive column and a temperature measuring element 1021. The end of the conductive column is connected to the temperature measuring element 1021. The temperature measuring element 1021 is a platinum thermal temperature sensor. The temperature measuring element 102 is connected to the temperature control box through the temperature measuring element 1021. The real-time temperature of the electrode can be displayed through the temperature control box. The temperature accuracy range is controlled within ±0.5℃, achieving high-precision control of the electrode temperature environment field. The temperature measuring element 102 is fixed at the other end of the conductive shell 10 through the second compression nut 16. The material of the conductive column includes 316 stainless steel or other metals. These materials have good corrosion resistance, good mechanical properties and good electrical conductivity. The heating element 101 and the temperature measuring element 102 are fixed in the conductor shell through the first compression nut 14 and the second compression nut 16, which can ensure that the electrode is in close contact with the heating element 101 and the temperature measuring element 102, and ensure normal charging and discharging of the electrode.

[0033] The fixed adapter 13 is screwed at one end of the conductive shell 10, specifically at the second compression nut 16. The fixed adapter 13 is fixed with the light source base, so that the electrode can stably carry out in-situ neutron scattering experiment test.

[0034] The first shield 11 and the second shield 12 need to meet the requirement of reducing neutron noise, and boron nitride ceramics are used in the embodiment, which can isolate and reduce the background signal in neutron scattering, and the accuracy of in-situ neutron scattering experiment of the electrode can be achieved. The second shield 12 is fixed on the outer surface of the conductive shell 10 through threads; the first shield 11 is fixed on the outer surface of the conductive shell 10 through threads, and the first shield 11 is sleeved on the connecting part of the fixed connecting part 13 and the conductive shell 10, the fixed connecting part 13 is fixed on the cap of the second compression nut 16 through threads, and the first shield 11 is fixed on the outer surface of the nut of the second compression nut 16 through threads, so that the fixed connecting part 13 and the first shield 11 are fixed on the same end of the conductive shell 10, and interact to keep the sealing of the conductive shell 10.

[0035] The heating part and the temperature measuring part can be used to control the heating temperature of the electrode without affecting the in-situ neutron scattering experiment, so that the temperature gradient problem in the traditional experiment can be avoided; the first shield and the second shield are arranged to isolate and reduce the background signal in neutron scattering, and the accuracy of in-situ neutron scattering experiment of the electrode can be achieved.

[0036] The in-situ neutron scattering battery device for electrode heating can be applied to different types of battery electrodes, including solid-state battery electrodes and lithium ion battery electrodes. For solid-state battery electrodes, the electrolyte is usually ceramic or polymer material, and the dependence on temperature is large, so it is often necessary to work at a high temperature to exhibit excellent ion conduction characteristics in practical application. The in-situ neutron scattering battery device can realize accurate heating of the solid-state battery electrode in the in-situ neutron scattering experiment, analyze the ion migration behavior, phase structure change and electrochemical performance of the solid-state battery electrode at different temperatures, and provide reliable experimental basis for the design of high-performance solid-state batteries.

[0037] For conventional lithium ion battery electrodes, the in-situ neutron scattering battery device has important application value in the research on the thermal runaway behavior of lithium ion battery electrodes. By gradually increasing the working temperature of the battery electrode during the in-situ neutron scattering experiment, the microstructure change, gas generation behavior and dynamic process of the electrode-electrolyte interface reaction of the materials inside the battery at different temperature stages can be observed, and key experimental data for revealing the causes and evolution mechanism of lithium ion battery thermal runaway are provided.

[0038] Embodiment 2

[0039] The embodiment provides an in-situ neutron scattering battery device for electrode heating, and the difference between the embodiment and embodiment 1 is that the heating part 101 comprises a conductive column and a heating rod, and the end of the conductive column is connected with the heating rod to form the heating part 101.

[0040] The above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An in-situ neutron scattering cell apparatus suitable for electrode heating, characterized by, It includes a conductive housing (10), inside which is provided a heating element (101) capable of heating the electrode and a temperature measuring element (102) capable of real-time monitoring of the electrode temperature. A fixed adapter (13) is provided at one end of the conductive housing (10), and a first shielding element (11) and a second shielding element (12) are respectively provided at both ends of the conductive housing (10).

2. The in-situ neutron scattering cell apparatus suitable for electrode heating of claim 1, wherein, The heating element (101) includes a conductive column and a heating rod, wherein the conductive column is connected to the heating rod.

3. The in-situ neutron scattering cell device suitable for electrode heating according to claim 1, characterized in that, The heating element (101) includes a conductive column and an electric heating wire, the electric heating wire being wound around the surface of the conductive column.

4. The in-situ neutron scattering cell device suitable for electrode heating according to claim 1, characterized in that, The temperature measuring device (102) includes a conductive column and a temperature measuring element (1021), wherein the conductive column is connected to the temperature measuring element (1021).

5. The in-situ neutron scattering cell device suitable for electrode heating according to claim 4, characterized in that, The temperature sensing element (1021) is a platinum thermoelectric temperature sensor.

6. The in-situ neutron scattering cell device suitable for electrode heating according to claim 1, characterized in that, The heating element (101) and the temperature measuring element (102) are fixed inside the conductive housing (10) by a clamping nut.

7. The in-situ neutron scattering cell device suitable for electrode heating according to claim 1, characterized in that, The first shield (11) and the second shield (12) are connected to the outer surface of the conductive housing (10) by threads.

8. The in-situ neutron scattering cell device suitable for electrode heating according to claim 1, characterized in that, The temperature measuring element (102) is fixed inside the conductive housing (10) by the second clamping nut (16), and the fixing adapter (13) is fixed to one end of the conductive housing (10) by threaded connection with the second clamping nut (16).

9. The in-situ neutron scattering cell device suitable for electrode heating according to claim 8, characterized in that, The first shielding member (11) is sleeved on the fixed adapter (13) and fixed to one end of the conductive housing (10) by threaded connection with the second clamping nut (16).

10. The in-situ neutron scattering cell device suitable for electrode heating according to claim 6, characterized in that, The clamping nut is made of insulating material.

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