CN212011137U - Thermal battery single battery testing device - Google Patents
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- CN212011137U CN212011137U CN202020515374.8U CN202020515374U CN212011137U CN 212011137 U CN212011137 U CN 212011137U CN 202020515374 U CN202020515374 U CN 202020515374U CN 212011137 U CN212011137 U CN 212011137U
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Abstract
The utility model belongs to the technical field of the thermal battery test, concretely relates to thermal battery cell testing arrangement. The device comprises a single battery assembling system and a single battery electrical performance testing system, wherein the single battery assembling system comprises a first stainless steel bracket, a motor, an upper pressure plate, an upper insulating sheet, an upper current collecting sheet, a second stainless steel bracket, a pushing and returning device, a single battery, an anti-overflow ring, a stainless steel sheet, a lower current collecting sheet, a lower insulating sheet, a lower pressure plate, a pressure sensor and a heating furnace; the assembly system of the single battery is not required to be assembled repeatedly during each test, so that the assembly and test difficulty of the single battery is greatly simplified, and the consistency of the test conditions of the single battery is ensured; the constant temperature system and the constant pressure system are separately arranged, so that the heating device cannot be damaged under high pressure, and the respective working stability of the two systems is ensured.
Description
Technical Field
The utility model belongs to the technical field of the thermal battery test, concretely relates to thermal battery cell testing arrangement.
Background
The thermal battery is a thermal activation primary reserve power supply which uses a heating system of the battery to heat and melt non-conductive solid salt electrolyte into an ionic conductor to enter a working state, and is mainly used as a main working power supply of nuclear weapons such as aviation missiles, torpedoes and the like. The thermal battery is composed of a plurality of single batteries connected in series and in parallel, and each single battery adopts a three-in-one sheet-making mode, namely, the thermal battery is composed of an anode, an electrolyte and a cathode; the positive electrode is FeS2And CoS2The cathode is generally made of lithium-silicon alloy, the lithium-boron alloy can be used under high power and high flow density, and the electrolyte is two LiCl-KCl electrolyte or three-element all-lithium LiCl-LiF-LiBr electrolyte.
In the existing thermal battery single battery assembly test technology, patent application with patent number 201811091393.6 discloses a thermal battery single battery test device and test method, wherein a pressure head, an insulating sheet and a current collecting sheet in a single battery assembly system in the test device are split, and the pressure head, the insulating sheet and the current collecting sheet are required to be reassembled one by one before each test, so that the assembly difficulty of the single battery assembly system is greatly increased, and the test efficiency is influenced. In addition, the pressure head fastening screw is adopted to apply the testing pressure to the single battery in the technology, and the pressure applied by the method is difficult to accurately control. And moreover, the tubular furnace is adopted for heating in the aspect of temperature, and the whole single battery assembly system is pushed into the tubular furnace for testing at high temperature, so that the operation difficulty of an operator is increased, and the stability of the testing atmosphere is difficult to ensure. Patent application for 201910476130.5 discloses a constant temperature and pressure formula thermal battery electrical property test system and test method, this utility model discloses the technique places the assembly system in the glove box and has guaranteed the stability of thermal battery test atmosphere, but this utility model discloses the technique is connected hot stove dish and press, under the condition of the high pressure of test is applyed to long-term press, heating furnace dish exterior structure and inside heating accessory warp the damage very easily, the press is hardly guaranteed to apply invariable pressure perpendicularly to the battery cell under the damaged condition of heating furnace dish, so this utility model discloses the technique is difficult for providing long-term stable assembly system for the battery cell test, influence battery cell's test continuity and stability.
SUMMERY OF THE UTILITY MODEL
The utility model discloses be exactly to thermal battery cell assembly system equipment among the prior art loaded down with trivial details, the operation degree of difficulty is big, pressure is uncontrollable, or the stove dish is easy damaged scheduling problem under the high pressure, provides a simple, easy hot battery cell's testing arrangement. The assembly system of the single battery is not required to be assembled repeatedly during each test, so that the assembly and test difficulty of the single battery is greatly simplified, and the consistency of the test conditions of the single battery is ensured; the constant temperature system and the constant pressure system are separately arranged, so that the heating device cannot be damaged under high pressure, and the respective working stability of the two systems is ensured. The utility model discloses a device still is provided with and pushes away material returned device and anti-overflow ring in succession, can prevent that cathode material's overflow from adhering to the mass flow piece on, has realized battery cell's continuous test.
The technical scheme of the utility model is that:
a thermal battery single battery testing device comprises a single battery assembling system and a single battery electrical performance testing system,
the single battery assembly system comprises a first stainless steel bracket, a motor, an upper pressure plate, an upper insulation sheet, an upper current collecting sheet, a second stainless steel bracket, a pushing and returning device, a single battery, an anti-overflow ring, a stainless steel sheet, a lower current collecting sheet, a lower insulation sheet, a lower pressure plate, a pressure sensor and a heating furnace;
a second stainless steel bracket is fixed in the middle of the heating furnace, and a material pushing and returning device is fixed on the second stainless steel bracket; the heating furnace is also provided with a material pushing port and a material returning port above the second stainless steel bracket respectively, and a material collecting disc matched with the material returning port is arranged below the material returning port and used for collecting the tested single batteries;
and the upper current collecting sheet and the lower current collecting sheet of the single battery assembly system are respectively connected with the single battery testing system through metal wires.
Furthermore, the upper current collecting sheet, the upper insulating sheet and the upper pressure plate of the single thermal battery testing device are integrated, and the upper pressure plate is connected with the motor through an opening at the top of the heating furnace and fixed on the first stainless steel bracket; the lower flow collecting sheet, the lower insulating sheet and the lower pressure plate are integrated, and the lower pressure plate is connected with the pressure sensor through an opening at the bottom of the heating furnace. The upper pressure plate is driven by the motor to descend to apply testing pressure to the single battery, the pressure sensor senses the pressure to ensure the stability of pressure application, and a constant-pressure environment for testing the single battery is provided; the heating furnace provides a constant temperature environment for the single battery test.
Furthermore, an observation window is arranged on the heating furnace, so that the working condition of the single battery under constant temperature and constant pressure can be observed in real time.
Furthermore, in the thermal battery single cell testing device, the upper insulating sheet and the upper current collecting sheet are fixed by fastening screws through the extended tabs, and the diameter of the upper current collecting sheet is smaller than that of the upper insulating sheet; the lower current collecting plate and the lower insulating plate are fixed by fastening screws through the extended tabs, and the diameter of the lower current collecting plate is smaller than that of the lower insulating plate. The integral type fastening design of insulating piece and current collector can avoid dismantling repeatedly when testing at every turn, and current collector diameter is less than the insulating piece diameter and can guarantee that the resistance of battery cell in the test procedure is little, keep warm and insulating effectual.
Furthermore, this thermal cell battery testing arrangement, the material pushing and returning device include ejector pin, material pushing disk and material returning disk. Furthermore, the material pushing rod is marked with a position mark, so that the single battery, the anti-overflow ring and the stainless steel sheet are pushed to the central position of the lower current collecting sheet. Furthermore, the heights of the inner surfaces of the material pushing disc and the material returning disc are consistent with the height of the upper surface of the lower collecting plate, so that the material pushing and returning operation is facilitated.
Furthermore, according to the thermal battery single battery testing device, the anti-overflow ring is a porous asbestos sheet or a mica sheet, and the bottom of the anti-overflow ring is fixed on the stainless steel sheet. During testing, the single cell is assembled in the inner hole of the anti-overflow ring, and then the stainless steel sheet is fixed at the top of the anti-overflow ring.
Furthermore, this thermal cell battery cell testing arrangement, the internal diameter of anti-overflow ring be greater than the battery cell diameter, the external diameter of anti-overflow ring and the diameter phase-match of stainless steel piece, the thickness phase-match of anti-overflow ring and battery cell's thickness.
Furthermore, the upper insulating sheet and the lower insulating sheet are mica sheets; the upper and lower current collecting plates are stainless steel plates or nickel plates.
Furthermore, the single battery is formed by pressing a negative electrode material, a diaphragm material and a positive electrode material under the pressure of 3t-10t, wherein the negative electrode material is lithium boron alloy, lithium silicon alloy or lithium aluminum alloy; the diaphragm material is a mixture of ternary all-lithium electrolyte LiF-LiCl-LiBr and MgO, and the anode material is FeS2Or CoS2LiF-LiCl-LiBr and Li as three-element all-lithium electrolyte2A mixture of O.
The single battery assembling system of the utility model is arranged in the glove box during use, the working environment is that the water content is less than or equal to 10PPM, and the oxygen content is less than or equal to 10 PPM.
The use method of the device comprises the following steps: the method for testing the single battery by using the single battery testing device comprises the following specific steps:
(1) transferring the single battery assembly system except the single battery, the anti-overflow ring and the stainless steel sheet into a glove box in advance, and introducing high-purity argon into the glove box to ensure that the water content in the glove box is less than or equal to 10ppm and the oxygen content is less than or equal to 10 ppm;
(2) starting a heating program of the heating furnace, heating to 500 ℃ according to the heating rate of 5-10 ℃/min, and setting a constant temperature section for later use;
(3) after the temperature is constant, transferring the assembled single battery, the anti-overflow ring and the stainless steel sheet to a material pushing disc of a material pushing and returning control device on the single battery assembly system, and pushing the single battery, the anti-overflow ring and the stainless steel sheet to the central position of a lower current collecting sheet through a material pushing rod according to the marked position mark;
(4) controlling the pressure to be 0.6-1t by a pressure sensor, controlling an upper pressure plate, an upper insulating sheet and an upper current collecting sheet to move downwards by a motor, and finally applying testing pressure to the single battery;
(5) connecting the metal wire of the upper current collecting sheet and the metal wire of the lower current collecting sheet in the single battery assembly system through the current and voltage collecting wire of the single battery test system, and setting the discharging step at 50-200mA/cm2Carrying out electrochemical performance test under current density;
(6) after the single battery is tested, the motor controls the upper pressure plate, the upper insulation sheet and the upper current collecting sheet to move upwards, the single battery, the anti-overflow ring and the stainless steel sheet are pushed out of a test area through the material pushing rod and collected into a material collecting tray, and then the next single battery is tested sequentially through the steps (3) - (5).
The beneficial effects of the utility model reside in that:
the utility model discloses a thermal battery cell testing arrangement provides a simple, easy-going thermal battery cell's testing arrangement. The device processes an upper current collecting plate, an upper insulating plate and an upper pressure plate into a whole, and is connected with a motor through an opening at the top of a heating furnace and fixed on a first stainless steel bracket; the lower current collecting sheet, the lower insulating sheet and the lower pressure plate are processed into a whole and connected with the pressure sensor through an opening at the bottom of the heating furnace; the structure forms a single battery constant-temperature and constant-voltage assembly system.
In addition, the upper and lower current collecting plates in the single battery assembly system are connected with the single battery electrical performance testing system through metal leads, so that the collection of the electrochemical performance parameters of the single battery is realized.
Before testing the single batteries, heating the temperature of a heating furnace to a constant temperature to a testing temperature, pushing the single batteries, the anti-overflow ring and the stainless steel sheet to a designated position of a lower current collecting sheet only through a material pushing and returning device, controlling an upper pressure plate to move downwards through a press machine to apply testing constant pressure to the single batteries, providing testing temperature by the heating furnace, and activating discharge work of the single batteries in a short time; the single battery assembling system does not need to be assembled repeatedly during each test, the assembling and testing difficulty of the single batteries is greatly simplified, and the consistency of the testing conditions of the single batteries is ensured.
The constant temperature system and the constant pressure system are separately arranged, so that the heating device cannot be damaged under high pressure, and the respective working stability of the constant temperature and constant pressure system is ensured.
The utility model discloses a device still is provided with and pushes away material returned device and anti-overflow ring in succession, can prevent that cathode material's overflow from adhering to the mass flow piece, has realized battery cell's continuous test, uses the utility model discloses a when testing arrangement carries out the battery cell test, only need through pushing away material returned device with battery cell, anti-overflow ring, nonrust steel sheet, the propelling movement is to the piece assigned position that flows down, need not assemble battery cell assembly system repeatedly, has simplified battery cell's the equipment and has tested the degree of difficulty greatly, has guaranteed battery cell test condition's uniformity.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is the structural schematic diagram of the single battery assembly system of the present invention.
Fig. 2 is a plan view of the insulating sheet.
Fig. 3 is a top view of a current collector.
Fig. 4 is a top view of the material pushing and returning device.
Fig. 5 is an assembly view of the unit battery, the anti-overflow ring and the stainless steel sheet.
Fig. 6 is a cell test curve.
In the figure: 1-a first stainless steel support, 2-a motor, 3-an upper pressure plate, 4-an upper insulation sheet, 5-an upper current collecting sheet, 6-a second stainless steel support, 7-a pushing and returning device, 8-a single battery, 9-an anti-overflow ring, 10-a stainless steel sheet, 11-a lower current collecting sheet, 12-a lower insulation sheet, 13-a lower pressure plate, 14-a pressure sensor and 15-a heating furnace.
Detailed Description
In order to make the technical solutions in the present invention better understood, the technical solutions in 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 only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
Embodiment 1 a thermal battery cell testing device
The device comprises a single battery assembling system and a single battery electrical performance testing system, wherein fig. 1 shows the single battery assembling system.
With reference to fig. 2-5, it can be seen that the single cell assembling system includes a first stainless steel bracket 1, a motor 2, an upper pressure plate 3, an upper insulation sheet 4, and an upper current collector sheet 5, where the upper current collector sheet 5, the upper insulation sheet 4, and the upper pressure plate 3 are integrated, and the upper pressure plate 3 is connected with the motor 2 through an opening at the top of a heating furnace 15 and fixed on the first stainless steel bracket 1;
the device also comprises a second stainless steel bracket 6, a material pushing and returning device 7, a single battery 8, an anti-overflow ring 9, a stainless steel sheet 10, a lower current collecting sheet 11, a lower insulating sheet 12, a lower pressure plate 13, a pressure sensor 14 and a heating furnace 15; the lower current collecting plate 11, the lower insulating plate 12 and the lower pressure plate 13 are integrated, and the lower pressure plate 13 is connected with the pressure sensor 14 through an opening at the bottom of the heating furnace 15. The upper insulating sheet 4 and the upper current collecting sheet 5 are fixed by fastening screws through extended tabs, and the diameter of the upper current collecting sheet 5 is smaller than that of the upper insulating sheet 4; the lower current collecting plate 11 and the lower insulation plate 12 are fixed by fastening screws through extended lugs, and the diameter of the lower current collecting plate 11 is smaller than that of the lower insulation plate 12. The diameters of the upper and lower current collecting plates 5 and 11 are 50mm, and the diameters of the upper and lower insulating plates 4 and 12 are 70 mm.
The structure of the insulating sheet and the current collecting sheet is shown with reference to fig. 2 and 3, wherein the upper current collecting sheet 5 and the lower current collecting sheet 11 have the same structure, and the lower insulating sheet 12 and the upper insulating sheet 4 have the same structure.
The upper current collecting sheet 5 and the lower current collecting sheet 11 of the single battery assembly system are respectively connected with the single battery testing system through metal leads.
A second stainless steel bracket 6 is fixed in the middle of the heating furnace 15, and a material pushing and returning device 7 is fixed on the second stainless steel bracket 6; the heating furnace 15 is also provided with a material pushing port 71 and a material returning port 72 above the second stainless steel bracket 6, and a material receiving tray 73 matched with the material returning port 72 is arranged below the material returning port 72 and used for collecting the tested single batteries; the pushing and returning device 7 comprises a pushing rod 74, a pushing disc 75 and a returning disc 76, wherein the pushing rod 74 is marked with a position mark to ensure that the single battery 8, the anti-overflow ring 9 and the stainless steel sheet 10 are pushed to the central position of the lower current collecting sheet 11; the inner surfaces of the material pushing disc 75 and the material returning disc 76 are consistent with the upper surface of the lower flow collecting plate 11 in height, so that the material pushing and returning operation is facilitated.
When the testing device is used, the upper pressure plate 3 is driven by the motor 2 to descend to apply testing pressure to the single battery 8, the pressure sensor 14 senses the pressure to ensure the stability of the pressure application, and a constant-pressure environment for testing the single battery 8 is provided; the heating furnace 15 provides a constant temperature environment for testing the single battery 8.
In addition, an observation window is arranged on the heating furnace 15, so that the working condition of the single battery under constant temperature and constant pressure can be observed in real time.
According to the testing device for the single battery of the thermal battery, the anti-overflow ring 9 is a porous asbestos sheet or a mica sheet, and the bottom of the anti-overflow ring is fixed on the stainless steel sheet 10. During testing, the single cell 8 is assembled into the inner hole of the anti-overflow ring 9, and the stainless steel sheet 10 is fixed on the top of the anti-overflow ring 9.
This thermal cell battery cell testing arrangement, anti-overflow ring 9's internal diameter be greater than battery cell 8 diameter, anti-overflow ring 9's external diameter and stainless steel sheet 10's diameter phase-match, anti-overflow ring 9's thickness and battery cell 6's thickness phase-match.
Specifically, the inner diameter of the anti-overflow ring 9 is 35mm, the outer diameter is 45mm, the thickness is 0.8mm, and the diameter of the stainless steel sheet 10 is 45 mm.
The upper insulation sheet 4 and the lower insulation sheet 12 are mica sheets; the upper and lower current collecting plates 5 and 11 are stainless steel plates or nickel plates.
The other technical characteristics are the same as those of the embodiment 1.
EXAMPLE 3 Single cell
The single battery 8 in the utility model is formed by pressing a negative electrode material, a diaphragm material and a positive electrode material under the pressure of 3t-10t, wherein the negative electrode material is lithium boron alloy, lithium silicon alloy or lithium aluminum alloy; the diaphragm material is a mixture of ternary all-lithium electrolyte LiF-LiCl-LiBr and MgO, and the anode material is FeS2Or CoS2LiF-LiCl-LiBr and Li as three-element all-lithium electrolyte2A mixture of O. The diameter of the single battery 8 is 32mm, and the thickness is 0.8 mm.
The preparation of the single battery 8 comprises the following steps:
(1) and (3) anode material: the negative electrode material is preferably lithium boron alloy;
(2) the diaphragm material: the diaphragm material is a mixture of ternary all-lithium electrolyte LiF-LiCl-LiBr and MgO, and is composed of 5% of LiF, 10% of LiCl, 35% of LiBr and 50% of MgO in proportion.
(3) A positive electrode material: the anode material is FeS2Ternary all-lithium electrolytes and Li2The mixture of O is FeS with the mixture ratio of 80 percent216% ternary all-lithium electrolyte, 4% Li2And O.
The preparation process comprises the following steps: adding a positive electrode material into a single battery mould with the diameter of 32mm in a drying room with the dew point lower than-40 ℃, paving, and pre-pressing by using the pressure of 1 t; then adding a diaphragm material, paving, and prepressing by using 1t of pressure; placing a lithium boron alloy sheet above the diaphragm material as a negative electrode; molding under 6t pressure, demolding, and repeating the above operations 3 times to obtain 3 single batteries 8.
Before testing, the bottom of the anti-overflow ring 9 is fixed on the stainless steel sheet 10, the single cell 8 is assembled in the inner hole of the anti-overflow ring 9, and the stainless steel sheet 10 is fixed on the top of the anti-overflow ring 9 for standby.
Example 4
The method for testing the single battery by using the single battery testing device comprises the following specific steps:
(1) transferring the single battery assembly system except the single battery 8, the anti-overflow ring 9 and the stainless steel sheet 10 into a glove box in advance, and introducing high-purity argon into the glove box to ensure that the water content in the glove box is less than or equal to 10ppm and the oxygen content is less than or equal to 10 ppm;
(2) starting a heating program of the heating furnace 15, heating to 500 ℃ according to a heating rate of 5-10 ℃/min, and setting a constant-temperature section for later use;
(3) after the temperature is constant, transferring the assembled single battery 8, the anti-overflow ring 9 and the stainless steel sheet 10 to a material pushing disc 75 of a material pushing and returning control device 7 on the single battery assembly system, and pushing the single battery 8, the anti-overflow ring 9 and the stainless steel sheet 10 to the central position of the lower current collecting sheet 11 through a material pushing rod 74 according to the marked position marks;
(4) the pressure is controlled to be 0.6-1t by the pressure sensor 14, the upper pressure plate 3, the upper insulation sheet 4 and the upper current collecting sheet 5 are controlled to move downwards by the motor 2, and finally the testing pressure is applied to the single battery;
(5) connecting the metal lead of the upper current collecting sheet 5 and the metal lead of the lower current collecting sheet 11 in the single battery assembly system through the current and voltage collecting line of the single battery test system, and setting the discharging step at 100mA/cm2Carrying out electrochemical performance test under current density;
(6) after the single battery test is finished, the motor 2 controls the upper pressure plate 3, the upper insulation sheet 4 and the upper current collecting sheet 5 to move upwards, the single battery 8, the anti-overflow ring 9 and the stainless steel sheet 10 are pushed out of a test area through the material pushing rod 74 and collected into the material collecting tray 73, and then the next single battery test is performed sequentially through the steps (3) - (5).
As can be seen from fig. 6, the voltage curves of the three tests all have a voltage plateau of about 2.0v during the period of 200-; the voltage of the single battery slowly decreases from 2.0V to 1.50V during 800-1500S; during the 1500-; the cell voltage slowly dropped from 1.5V to 1.25V during 2600-.
To sum up, use battery cell testing arrangement can test out battery cell's electrochemical performance effectively, and the result of cubic test has repeatability and uniformity.
Although the present invention has been described in detail by referring to the drawings in conjunction with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and substance of the present invention, and these modifications or substitutions are intended to be within the scope of the present invention/any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (11)
1. A thermal battery single battery testing device is characterized in that the device comprises a single battery assembling system and a single battery electrical property testing system,
the single battery assembly system comprises a first stainless steel bracket, a motor, an upper pressure plate, an upper insulation sheet, an upper current collecting sheet, a second stainless steel bracket, a pushing and returning device, a single battery, an anti-overflow ring, a stainless steel sheet, a lower current collecting sheet, a lower insulation sheet, a lower pressure plate, a pressure sensor and a heating furnace;
a second stainless steel bracket is fixed in the middle of the heating furnace, and a material pushing and returning device is fixed on the second stainless steel bracket; the heating furnace is also provided with a material pushing port and a material returning port above the second stainless steel bracket respectively, and a material collecting disc matched with the material returning port is arranged below the material returning port and used for collecting the tested single batteries;
and the upper current collecting sheet and the lower current collecting sheet of the single battery assembly system are respectively connected with the single battery testing system through metal wires.
2. The thermal battery cell testing device of claim 1, wherein the upper current collector, the upper insulation sheet and the upper pressure plate are integrated, and the upper pressure plate is connected to the motor through the opening at the top of the heating furnace and fixed on the first stainless steel bracket; the lower flow collecting sheet, the lower insulating sheet and the lower pressure plate are integrated, and the lower pressure plate is connected with the pressure sensor through an opening at the bottom of the heating furnace.
3. The thermal battery cell testing device according to claim 1 or 2, wherein the heating furnace is provided with an observation window.
4. The thermal battery cell testing device of claim 1 or 2, wherein the upper insulating sheet and the upper current collector are fixed by a fastening screw through a protruding tab, and the diameter of the upper current collector is smaller than that of the upper insulating sheet; the lower current collecting plate and the lower insulating plate are fixed by fastening screws through the extended tabs, and the diameter of the lower current collecting plate is smaller than that of the lower insulating plate.
5. The thermal battery cell testing device of claim 1 or 2, wherein the pushing and returning device comprises a pushing rod, a pushing disc and a returning disc.
6. The thermal battery cell testing device of claim 5, wherein the pusher bar is marked with a location indicator.
7. The thermal battery cell testing device as claimed in claim 5, wherein the inner surfaces of the pushing tray and the withdrawing tray are at the same height as the upper surface of the lower current collecting plate.
8. A thermal battery cell testing device as claimed in claim 1 or 2, wherein the anti-overflow ring is a perforated asbestos or mica sheet with a bottom fixed to a stainless steel sheet.
9. The thermal battery cell testing device of claim 6, wherein the inner diameter of the anti-overflow ring is larger than the diameter of the cell, the outer diameter of the anti-overflow ring matches the diameter of the stainless steel sheet, and the thickness of the anti-overflow ring matches the thickness of the cell.
10. The thermal battery cell testing device of claim 1 or 2, wherein the upper and lower insulating sheets are mica sheets; the upper and lower current collecting plates are stainless steel plates or nickel plates.
11. The thermal battery single cell testing device according to claim 1 or 2, wherein the single cell is formed by pressing a negative electrode material, a diaphragm material and a positive electrode material under a pressure of 3t-10t, wherein the negative electrode material is a lithium boron alloy, a lithium silicon alloy or a lithium aluminum alloy; the diaphragm material is a mixture of ternary all-lithium electrolyte LiF-LiCl-LiBr and MgO, and the anode material is FeS2Or CoS2LiF-LiCl-LiBr and Li as three-element all-lithium electrolyte2A mixture of O.
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