CN210198972U - Lithium battery in-situ microscopic imaging device and in-situ high-temperature microscopic imaging device - Google Patents
Lithium battery in-situ microscopic imaging device and in-situ high-temperature microscopic imaging device Download PDFInfo
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- CN210198972U CN210198972U CN201920517273.1U CN201920517273U CN210198972U CN 210198972 U CN210198972 U CN 210198972U CN 201920517273 U CN201920517273 U CN 201920517273U CN 210198972 U CN210198972 U CN 210198972U
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Abstract
The utility model discloses a lithium battery in-situ microscopic imaging device, which relates to the technical field of material characterization, and comprises a cavity and a battery core package, wherein a first groove for placing the battery core package is arranged in the cavity; the battery core package comprises a positive electrode shell, a negative electrode shell and a lead post, wherein the positive electrode shell is connected with the negative electrode shell to form a sealed cavity; a second groove for placing a sample to be tested is arranged in the sealed cavity, holes are formed in the side walls of the positive electrode shell and the negative electrode shell, and lead posts penetrating through the positive electrode shell and the negative electrode shell are arranged in the holes; an optical window is arranged above the first groove; the cavity is provided with a lead through hole, an electrode binding post is arranged in the lead through hole and electrically connected with the lead post, and the cavity is provided with the lead binding post electrically connected with a sample to be detected; the utility model discloses still disclose the microscopic image device of lithium cell normal position high temperature, the beneficial effects of the utility model reside in that: the battery charging and discharging process can be observed, so that data support is provided for better understanding of the formation evolution of the lithium dendrites.
Description
Technical Field
The utility model relates to a material characterization technical field, concretely relates to microscopic and high temperature microscopic imaging device of normal position of lithium cell normal position.
Background
With the increasing demand of people on energy storage devices, lithium ion batteries become one of the most popular portable power supplies in modern society, and due to the advantages of high energy density, high power density, high safety and the like, the lithium ion batteries are expected to be applied to wider fields, such as electric automobiles and the like. In order to achieve the goal, great efforts are made to find new electrode materials and new battery systems, and meanwhile, understanding the surface reaction of the electrode materials and effectively solving the dendrite problem of the metallic lithium negative electrode are considered by more and more people as important prerequisites for optimizing the battery systems. In current phase research, dendrite growth and the consequent potential safety hazard and cycle life reduction of the battery severely interfere with the practical application of lithium metal cathodes. The traditional dendrite research method is to disassemble the battery after circulation and observe and research the pole piece. However, this method has problems that the electrode sheet is exposed after the battery is disassembled, the surface state of the electrode sheet may be damaged by volatilization of the electrolyte on the surface and side reactions caused by contact gas, and the growth process of dendrite cannot be continuously observed. In order to overcome a similar set of problems, in situ observation methods that do not require disassembly of the cell have emerged. The method can reduce the evolution process of the surface morphology of the pole piece in the charging and discharging process of the battery to the maximum extent, and can capture the swinging and other motions of dendritic crystals.
The currently known morphology characterization methods include the following: the device comprises an in-situ Atomic Force Microscope (AFM), an in-situ Scanning Electron Microscope (SEM), an in-situ Transmission Electron Microscope (TEM), an in-situ Laser Scanning Copolymerization Microscope (LSCM), a synchronous X-ray tomography and the like, but the devices are complex to assemble, most of the devices are greatly limited in battery structure, charging and discharging conditions and the like, the difference from an actual system is huge, and most of all, the growth of macroscopic dendrites is difficult to describe by partial over-microscopic observation results. Compared with the prior art, although the in-situ optical microscope cannot achieve high resolution of a nanometer scale, the in-situ optical microscope can track the growth process of the macroscopic dendrite and the change of the electrode surface in real time very conveniently and effectively, so that the in-situ optical microscope becomes a more common observation means, and the lithium ion battery microscopic imaging in-situ battery can realize the surface reaction of the lithium sheet and the electrode material and the online observation of the phenomena of the lithium dendrite and the like.
Overcharge or overdischarge of the lithium ion battery is easily caused by large-current charge and discharge, battery management system failure, inconsistency of internal resistance and the like, and if the battery capacity is reduced or the battery fails, thermal runaway is seriously caused. In thermal failure testing, the temperature field has been a critical factor. The currently common simulation method is to place the battery in a heating body such as an oven, and then to realize supply of different temperatures by heating the whole. The temperature of the battery cell body can be uniform, but one defect is that only a single performance test can be carried out on the battery cell body under different temperature conditions, and the characterization of other structures cannot be realized. In the actual operation process, the battery itself is overcharged and overdischarged to cause thermal failure and simultaneously has obvious influence on electrode materials or electrolyte, and the changes are the root cause of the battery safety accidents.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve one of the problems lies in providing a micro-imaging device of lithium cell normal position, monitors the situation of change of the electrode material of battery charge-discharge flow.
The utility model discloses an adopt following technical scheme to solve above-mentioned technical problem:
the utility model provides a lithium battery in-situ microscopic imaging device, which comprises a cavity and a battery core package, wherein a first groove is arranged in the cavity, and the battery core package for clamping a sample to be tested is arranged in the first groove; the battery core package comprises a positive electrode shell, a negative electrode shell and a lead post, wherein the positive electrode shell is connected with the negative electrode shell to form a sealed cavity; a second groove for placing a sample to be tested is arranged in the sealed cavity, holes are formed in the side walls of the positive electrode shell and the negative electrode shell, and lead posts penetrating through the positive electrode shell and the negative electrode shell are arranged in the holes;
an optical window is arranged above the first groove; the cavity is provided with a lead through hole, an electrode binding post is arranged in the lead through hole, the electrode binding post is electrically connected with the lead post, and the cavity is provided with the lead binding post electrically connected with a sample to be detected.
The working principle is as follows: the sample to be tested is placed in the first groove, the lead terminal is connected with the sample to be tested, the electrode terminal is connected with the battery core pack, the lithium battery in-situ microscopic imaging device is placed under an optical microscope, and the charging and discharging process of the battery and the optical test of the electrode structure in the process can be completed through a normal battery testing system.
Has the advantages that: the utility model discloses can observe battery charge and discharge flow, realize the direct observation to lithium dendrite under the condition of relative macroscopic (micron level), this device is though can't observe at the nanometer aspect, but can follow the micron level and carry out direct observation, can compensate normal position transmission electron microscope's not enough to form the evolution for better understanding lithium dendrite provides data support.
Preferably, a diaphragm layer, a positive electrode material of the sample to be detected and a negative electrode material of the sample to be detected are arranged in the second groove, the positive electrode material of the sample to be detected and the negative electrode material of the sample to be detected are respectively located on two sides of the diaphragm layer, and a reference electrode material of the sample to be detected is arranged at the lower end of the positive electrode material of the sample to be detected.
Preferably, the positive electrode shell and the negative electrode shell are connected through threads.
Preferably, threaded holes are formed in the side walls of the positive electrode shell and the negative electrode shell, and screws are arranged in the threaded holes.
Preferably, a first sealing element is arranged between the positive electrode shell and the negative electrode shell.
Preferably, the material of the membrane layer is polyetheretherketone.
Preferably, the optical window further comprises a window cover, and the window cover is arranged above the optical window.
Preferably, a second seal is provided between the window gland and the optical window.
Preferably, the material of the optical window is a single crystal alumina material.
Preferably, three lead terminal groove bodies are arranged on two sides of the cavity, two lead terminal groove bodies are arranged on one side close to the positive electrode shell, one lead terminal groove body is arranged on one side close to the negative electrode shell, and the lead terminal is located in the lead terminal groove bodies.
The working principle is as follows: installing the lead posts on the positive electrode shell and the negative electrode shell, sequentially placing the positive electrode material of the sample to be tested, the negative electrode material of the sample to be tested, the reference electrode material of the sample to be tested and the diaphragm layer into the second groove, placing the sealing element between the positive electrode shell and the negative electrode shell, adding the diaphragm layer, and sealing and fixing the battery core package through screws; three lead binding posts are respectively arranged in the three lead binding post groove bodies, and the three lead binding posts are respectively and electrically connected with the anode material of the sample to be detected, the cathode material of the sample to be detected and the reference electrode material of the sample to be detected through conducting wires; the electrode binding post is electrically connected with the lead post through a lead.
Sealing the cavity by adopting a first sealing element and a window gland; the processes are all completed in a glove box with argon protection, the sealed battery is taken out from the glove box after the sealing is confirmed to be complete, the battery is placed under an optical microscope, and the charging and discharging processes of the battery and the optical test of the electrode structure in the process are completed through a normal battery test system.
Has the advantages that: the first sealing element is used for enhancing the sealing property between the negative electrode shell and the positive electrode shell; the second sealing element is used for enhancing the sealing property between the optical window and the window gland;
lead terminal respectively with the positive electrode material of the sample that awaits measuring, the negative pole material of the sample that awaits measuring, the reference electrode material electric connection of the sample that awaits measuring, electrode terminal and lead terminal electric connection play the electron and transport the effect, and the polyether ether ketone material possesses the high strength property of metal material, possesses insulating function simultaneously, can play the effect that prevents the short circuit of battery nuclear package.
The second technical problem to be solved by the invention is to provide an in-situ high-temperature microscopic imaging device for a lithium battery, which monitors the change conditions of an electrode material and electrolyte of the lithium battery in the heating process.
The invention also provides an in-situ high-temperature microscopic imaging device for the lithium battery, which comprises a cavity and a heating system; a first groove for accommodating a sample to be detected is arranged in the cavity, and an optical window is arranged above the first groove; the heating system comprises a heating device and a heating and electrifying device, wherein the heating device surrounds the cavity, and the heating and electrifying device is connected with the heating device.
The working principle is as follows: the sample to be measured is placed in the first groove, the sample to be measured is heated through the heating device surrounding the cavity, and the sample to be measured is placed under the optical microscope and observed through the observation window.
Has the advantages that: the utility model discloses can observe the situation of change of the electrode material and the electrolyte of heating in-process lithium cell, make clear of the battery overcharge, the thermal behavior performance of overdischarge in-process, can also deepen the understanding that takes place the root cause of the thermal runaway of overcharge and overdischarge to lithium ion battery, master the leading cause that induces the thermal runaway.
Preferably, a battery core pack for clamping a sample to be tested is arranged in the first groove, the battery core pack comprises a positive electrode shell, a negative electrode shell and a lead post, and the positive electrode shell is connected with the negative electrode shell to form a sealed cavity; a second groove for placing a sample to be tested is arranged in the sealed cavity, holes are formed in the side walls of the positive electrode shell and the negative electrode shell, and lead posts penetrating through the positive electrode shell and the negative electrode shell are arranged in the holes;
the cavity is provided with a lead through hole, an electrode binding post is arranged in the lead through hole, the electrode binding post is electrically connected with the lead post, and the cavity is provided with the lead binding post electrically connected with a sample to be detected.
Preferably, a diaphragm layer, a positive electrode material of the sample to be detected and a negative electrode material of the sample to be detected are arranged in the second groove, the positive electrode material of the sample to be detected and the negative electrode material of the sample to be detected are respectively located on two sides of the diaphragm layer, and a reference electrode material of the sample to be detected is arranged at the lower end of the positive electrode material of the sample to be detected.
Preferably, the positive electrode shell and the negative electrode shell are connected through threads.
Preferably, threaded holes are formed in the side walls of the positive electrode shell and the negative electrode shell, and screws are arranged in the threaded holes.
Preferably, a first sealing element is arranged between the positive electrode shell and the negative electrode shell.
Preferably, the material of the membrane layer is polyetheretherketone.
Preferably, the optical window further comprises a window gland, an upper cover plate and a lower cover plate, wherein the window gland is arranged above the optical window, the upper cover plate is positioned at the top end of the window, and the lower cover plate is positioned at the bottom end of the cavity.
Preferably, a second seal is provided between the window gland and the optical window.
Preferably, the material of the optical window is a single crystal alumina material.
Preferably, the heating system further comprises a temperature control device, the temperature control device being disposed proximate to the first recess.
Preferably, three lead terminal groove bodies are arranged on two sides of the cavity, two lead terminal groove bodies are arranged on one side close to the positive electrode shell, one lead terminal groove body is arranged on one side close to the negative electrode shell, and the lead terminal is located in the lead terminal groove bodies.
The working principle is as follows: installing the lead posts on the positive electrode shell and the negative electrode shell, sequentially placing the positive electrode material of the sample to be tested, the negative electrode material of the sample to be tested, the reference electrode material of the sample to be tested and the diaphragm layer into the second groove, placing the sealing element between the positive electrode shell and the negative electrode shell, adding the diaphragm layer, and sealing and fixing the battery core package through screws; three lead binding posts are respectively arranged in the three lead binding post groove bodies, and the three lead binding posts are respectively and electrically connected with the anode material of the sample to be detected, the cathode material of the sample to be detected and the reference electrode material of the sample to be detected through conducting wires; the electrode binding post is electrically connected with the lead post through a lead.
Sealing the cavity by adopting a first sealing element and a window gland; the processes are all completed in a glove box with argon protection, the glove box is taken out after the sealing is confirmed to be complete, the glove box is placed under an optical microscope and is heated through a heating wire, a temperature control device adjusts the temperature, and the thermal behavior performance of the charging and discharging processes of the sample to be measured at different temperatures is measured.
Has the advantages that: the first sealing element is used for enhancing the sealing property between the negative electrode shell and the positive electrode shell; the second sealing element is used for enhancing the sealing property between the optical window and the window gland;
lead terminal respectively with the positive electrode material of the sample that awaits measuring, the negative pole material of the sample that awaits measuring, the reference electrode material electric connection of the sample that awaits measuring, electrode terminal and lead terminal electric connection play the electron and transport the effect, and the polyether ether ketone material possesses the high strength property of metal material, possesses insulating function simultaneously, can play the effect that prevents the short circuit of battery nuclear package.
Drawings
Fig. 1 is a schematic sectional structure view of a lithium battery in-situ microscopic imaging device in embodiment 1 of the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a schematic structural view of a battery core pack according to embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a lead terminal groove body in embodiment 1 of the present invention;
fig. 5 is a schematic cross-sectional structure diagram of an in-situ high-temperature microscopic imaging device of a lithium battery in embodiment 2 of the present invention;
in the figure: 11-a cavity; 111-a first recess; 112-an optical window; 113-window gland; 114-electrode terminals; 1151-a first post channel; 1152-a second post channel; 1153-a third wire post groove body; 116-upper cover plate; 117-screw; 118-a lower cover plate; 12-battery core pack; 121-positive electrode shell; 122-a negative electrode can; 123-lead post; 125-membrane layer; 126-positive electrode material of sample to be tested; 127-the negative electrode material of the sample to be tested; 128-reference electrode material of the sample to be tested; 13-a heating system; 131-electric heating wire; 132-a heating and energizing device; 133-temperature control means.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Example 1
A lithium battery in-situ microscopic imaging device comprises a cavity 11 and a battery core pack 12;
as shown in fig. 1 and 2, the cavity 11 is cylindrical, the size of the cavity 11 can be set according to actual requirements, the cavity 11 is made of high temperature resistant metal, in this embodiment, the cavity 11 is made of aluminum alloy, a first groove 111 for placing the battery core pack 12 is arranged in the cavity 11, an optical window 112 is arranged above the first groove 111, and a window gland 113 for fixing the optical window 112 to the cavity 11 is arranged on the optical window 112; in the embodiment, the diameter of the cavity 11 is 55mm, and the height is 24 mm; the first grooves 111 have dimensions of 30 × 15 × 7 mm; the optical window 112 is made of single crystal alumina, the window gland 113 is in a ring shape, the diameter of the window gland 113 is 55mm, the diameter of the central through hole is 36mm, and the window gland 113 is made of stainless steel; an annular groove (not shown) is arranged between the optical window 112 and the window gland 113, and a second sealing ring is arranged in the annular groove; an upper cover plate 116 is mounted above the window gland 113, the upper cover plate 116 is annular, and the upper cover plate 116 is fixed to the chamber 11 by a screw 117.
The first groove 111 is provided with a battery core pack 12 for accommodating a sample to be tested, as shown in fig. 3, the battery core pack 12 includes a positive electrode shell 121, a negative electrode shell 122 and a lead post 123, the positive electrode shell 121 is connected with the negative electrode shell 122 to form a sealed cavity; a second groove for placing a sample to be detected is arranged in the sealed cavity; holes are formed in the side walls of the positive electrode shell 121 and the negative electrode shell 122, and lead posts 123 penetrating through the positive electrode shell 121 and the negative electrode shell 122 are mounted in the holes; in this embodiment, the membrane layer 125 is made of polyetheretherketone, and has a thickness of 0.5mm and a pore size of 0.5 μm; the material of the lead post 123 is oxygen-free copper, and the outer side of the lead post 123 is provided with external threads.
The diaphragm layer 125, the positive electrode material 126 of the sample to be measured and the negative electrode material 127 of the sample to be measured are arranged in the second groove, the positive electrode material 126 of the sample to be measured and the negative electrode material 127 of the sample to be measured are respectively positioned on two sides of the diaphragm layer 125, the reference electrode material 128 of the sample to be measured is arranged below the negative electrode material 126 of the sample to be measured, and the reference electrode material 128 of the reference sample to be measured is in contact with the diaphragm layer 125.
Threaded holes are formed in the side walls of the positive electrode shell 121 and the negative electrode shell 122, screws are arranged in the threaded holes, and a first sealing ring is arranged between the positive electrode shell 121 and the negative electrode shell 122.
A lead through hole is formed in the cavity 11, an electrode binding post 114 is arranged in the lead through hole, the electrode binding post 114 is electrically connected with the lead post 123 through a lead, a third sealing ring is arranged in the lead through hole, and the electrode binding post 114 is a bolt;
as shown in fig. 4, two sides of the cavity 11 are provided with three lead post groove bodies, namely a first lead post groove body 1151, a second lead post groove body 1152 and a third lead post groove body 1153, and one side close to the positive electrode shell 121 is provided with two lead post groove bodies, namely a first lead post groove body 1151 and a second lead post groove body 1152; a third lead terminal groove 1153 is formed on one side close to the negative electrode casing 122, lead terminals (not shown) are arranged in the three lead terminal grooves, and the three lead terminals are electrically connected with the positive electrode material 126 of the sample to be detected, the negative electrode material 127 of the sample to be detected and the reference electrode material 128 of the sample to be detected respectively through wires.
The working principle of the embodiment is as follows: installing the lead posts 123 on the positive electrode shell 121 and the negative electrode shell 122, sequentially placing a positive electrode material 126 of a sample to be tested loaded with electrolyte, a negative electrode material 127 of the sample to be tested loaded with electrolyte and a reference electrode material 128 of the sample to be tested loaded with electrolyte into the second groove, placing a first sealing ring between the positive electrode shell 121 and the negative electrode shell 122, adding a diaphragm layer 125, and sealing and fixing the battery core package 12 through screws; three lead binding posts are respectively arranged in the three lead binding post groove bodies, and the three lead binding posts are respectively and electrically connected with the anode material 126 of the sample to be detected, the cathode material 127 of the sample to be detected and the reference electrode material 128 of the sample to be detected through conducting wires; the electrode post 114 is electrically connected to the lead post 123 through a wire.
The cavity 11 is sealed by a first sealing ring and a window gland 113; the processes are all completed in a glove box with argon protection, the sealed battery is taken out from the glove box after the sealing is confirmed to be complete, the battery is placed under an optical microscope, and the charging and discharging processes of the battery and the optical test of the electrode structure in the process are completed through a normal battery test system.
The beneficial effects of the embodiment are that: the utility model discloses can observe the battery and confirm battery charge-discharge flow, realize the direct observation to lithium dendrite under relative macroscopic condition (micron level), this device is though unable to observe at the nanometer aspect, but can follow the micron level and carry out direct observation, can compensate not enough of normal position transmission electron microscope to form the evolution and provide data support for better understanding lithium dendrite.
The first seal ring is used to enhance the sealing property between the positive electrode can 121 and the negative electrode can 122; the second sealing ring is used for enhancing the sealing performance between the optical window 112 and the window gland 113;
the lead terminal is respectively and electrically connected with the positive electrode material 126 of the sample to be detected, the negative electrode material 127 of the sample to be detected and the reference electrode material 128 of the sample to be detected, the electrode terminal 114 is electrically connected with the lead terminal 123 to play an electron transportation role, the polyether-ether-ketone material has high strength performance of a metal material and an insulation function, and the function of preventing the short circuit of the battery core pack 12 can be achieved.
Example 2
This embodiment is different from embodiment 1 in that: as shown in fig. 5, the in-situ high-temperature microscopic imaging device for the lithium battery further comprises a heating system 13 and a lower cover plate 118, wherein the lower cover plate 118 is fixed at the lower end of the cavity 11 through screws; the heating system 13 includes a heating wire 131, a heating and energizing device 132 and a temperature control device 133, the heating wire 131 surrounds the cavity 11, the heating and energizing device 132 is connected to the heating wire 131 in a matching manner, a hole is formed in the cavity 11, the temperature control device 133 is disposed in the hole, and the temperature control device 133 is disposed near the first groove 111, wherein the heating and energizing device 132 and the temperature control device 133 are the prior art, as long as the heating and energizing of the heating wire 131 and the temperature control can be achieved, in this embodiment, the temperature control device 133 is a thermocouple, and may be a high-temperature thermocouple or a screw-type thermocouple; the model of the thermocouple can be a thermocouple YB-150A.
The working principle of the embodiment is as follows: the sample to be measured is heated by the heating wire 131, the temperature is adjusted by the temperature control device 133, and the thermal behavior of the sample to be measured in the charging and discharging process at different temperatures is measured.
The beneficial effects of this embodiment: the thermocouple can be combined with the heating wire 131 to control the temperature in the first groove 111, and interface research under different temperature conditions is carried out; the embodiment can observe the change conditions of the electrode material and the electrolyte of the lithium battery in the heating process, clearly show the thermal behavior performance of the lithium battery in the overcharge and overdischarge processes, deepen the understanding of the source of the thermal runaway of the overcharge and overdischarge of the lithium battery, and master the main reason for inducing the thermal runaway.
The above is only the preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above embodiments, and the various process schemes without substantial difference are all within the protection scope of the present invention.
Claims (10)
1. The utility model provides a micro-imaging device of lithium cell normal position which characterized in that: the battery core pack comprises a cavity and a battery core pack, wherein a first groove for placing the battery core pack is formed in the cavity; the battery core package comprises a positive electrode shell, a negative electrode shell and a lead post, wherein the positive electrode shell is connected with the negative electrode shell to form a sealed cavity; a second groove for placing a sample to be tested is arranged in the sealed cavity, holes are formed in the side walls of the positive electrode shell and the negative electrode shell, and lead posts penetrating through the positive electrode shell and the negative electrode shell are arranged in the holes;
an optical window is arranged above the first groove; the cavity is provided with a lead through hole, an electrode binding post is arranged in the lead through hole, the electrode binding post is electrically connected with the lead post, and the cavity is provided with the lead binding post electrically connected with a sample to be detected.
2. The in-situ microscopic imaging device for the lithium battery as recited in claim 1, wherein: the second groove is internally provided with a diaphragm layer, a positive electrode material of a sample to be detected and a negative electrode material of the sample to be detected, the positive electrode material of the sample to be detected and the negative electrode material of the sample to be detected are respectively positioned at two sides of the diaphragm layer, and the lower end of the positive electrode material of the sample to be detected is provided with a reference electrode material of the sample to be detected.
3. The in-situ microscopic imaging device for the lithium battery as recited in claim 1, wherein: the two sides of the cavity are provided with three lead terminal groove bodies, one side close to the positive electrode shell is provided with two lead terminal groove bodies, one side close to the negative electrode shell is provided with one lead terminal groove body, and the lead terminal is positioned in the lead terminal groove body.
4. The in-situ microscopic imaging device for the lithium battery as recited in claim 1, wherein: and the positive electrode shell is connected with the negative electrode shell through threads.
5. The utility model provides a lithium cell normal position high temperature micro-imaging device which characterized in that: comprises a cavity and a heating system; a first groove for accommodating a sample to be detected is arranged in the cavity, and an optical window is arranged above the first groove; the heating system comprises a heating device and a heating and electrifying device, wherein the heating device surrounds the cavity, and the heating and electrifying device is connected with the heating device.
6. The in-situ high-temperature microscopic imaging device for the lithium battery as claimed in claim 5, wherein: a battery core pack for clamping a sample to be tested is arranged in the first groove, the battery core pack comprises a positive electrode shell, a negative electrode shell and a lead post, and the positive electrode shell is connected with the negative electrode shell to form a sealed cavity; a second groove for placing a sample to be tested is arranged in the sealed cavity, holes are formed in the side walls of the positive electrode shell and the negative electrode shell, and lead posts penetrating through the positive electrode shell and the negative electrode shell are arranged in the holes;
the cavity is provided with a lead through hole, an electrode binding post is arranged in the lead through hole, the electrode binding post is electrically connected with the lead post, and the cavity is provided with the lead binding post electrically connected with a sample to be detected.
7. The in-situ high-temperature microscopic imaging device for the lithium battery as claimed in claim 6, wherein: the second groove is internally provided with a diaphragm layer, a positive electrode material of a sample to be detected and a negative electrode material of the sample to be detected, the positive electrode material of the sample to be detected and the negative electrode material of the sample to be detected are respectively positioned at two sides of the diaphragm layer, and the lower end of the positive electrode material of the sample to be detected is provided with a reference electrode material of the sample to be detected.
8. The in-situ high-temperature microscopic imaging device for the lithium battery as claimed in claim 5, wherein: the heating system further comprises a temperature control device, wherein the temperature control device is arranged close to the first groove.
9. The in-situ high-temperature microscopic imaging device for the lithium battery as claimed in claim 6, wherein: the two sides of the cavity are provided with three lead terminal groove bodies, one side close to the positive electrode shell is provided with two lead terminal groove bodies, one side close to the negative electrode shell is provided with one lead terminal groove body, and the lead terminal is positioned in the lead terminal groove body.
10. The in-situ high-temperature microscopic imaging device for the lithium battery as claimed in claim 5, wherein: the optical window comprises a cavity, and is characterized by further comprising a window gland, an upper cover plate and a lower cover plate, wherein the window gland is arranged above the optical window, the upper cover plate is located at the top end of the window, and the lower cover plate is located at the bottom end of the cavity.
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| CN112945856A (en) * | 2021-02-25 | 2021-06-11 | 天津力神电池股份有限公司 | Optical in-situ observation method for variable-temperature charging and discharging of lithium ion experimental battery |
| CN113588645A (en) * | 2021-08-05 | 2021-11-02 | 南京航空航天大学 | In-situ microscopic imaging device for metal negative electrode battery |
| CN113893411A (en) * | 2021-12-10 | 2022-01-07 | 杭州未名信科科技有限公司 | Multi-stage electroosmosis micropump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112255232A (en) * | 2020-11-04 | 2021-01-22 | 清华大学 | Visual battery and preparation method and application thereof |
| CN112945856A (en) * | 2021-02-25 | 2021-06-11 | 天津力神电池股份有限公司 | Optical in-situ observation method for variable-temperature charging and discharging of lithium ion experimental battery |
| CN113588645A (en) * | 2021-08-05 | 2021-11-02 | 南京航空航天大学 | In-situ microscopic imaging device for metal negative electrode battery |
| CN113893411A (en) * | 2021-12-10 | 2022-01-07 | 杭州未名信科科技有限公司 | Multi-stage electroosmosis micropump |
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