New energy battery multifunctional tester

Abstract

The utility model provides a new energy battery multifunctional tester, which relates to the technical field of new energy batteries and comprises a test tank and an upper cover, the upper cover is inserted into one end of the test tank, the inner end and the outer end of the test tank are separated to form a test cavity and a hollow layer, the hollow layer is mainly made of alloy materials, and a plurality of heating ring handles surround the outer cavity wall of the test cavity. The heating ring handle is externally connected with a heater interface seat; the test cavity and the inner end of the upper cover are separated to form an outer pipe sleeve, a rotary handle pipe is in threaded fit between the upper cover and the outer pipe sleeve, and a step surface is formed between the rotary handle pipe and the test cavity; the tester is different from an existing ARC instrument which needs 2-3 days for testing thermal runaway of a battery, and the thermal runaway test of the battery can be rapidly completed within 6 hours by performing an accelerated calorimetric test in the airtight cavity through the tester.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy batteries, and more specifically, to a multifunctional tester for new energy batteries. Background Art

[0002] The Accelerating Rate Calorimeter (ARC), a new type of thermal analysis instrument recommended by the United Nations for hazardous materials assessment, provides time-temperature-pressure data for chemical reactions under adiabatic conditions. During ARC testing of exothermic hazardous chemicals, a main heater at the bottom of the test furnace heats the test sample, while heaters at the top, bottom, and sides of the furnace replenish heat loss caused by the temperature difference between the sample and its surroundings, maintaining an adiabatic test environment for the sample ball and keeping the furnace temperature consistent with the sample test system temperature. Throughout the process, a computer automatically records parameters such as time, temperature, and pressure.

[0003] ARC instruments currently available on the market for measuring battery thermal runaway characteristics have virtually no airtightness and are unable to use a test bulb to measure reactive chemicals. When measuring electrical failure, the voltage and current leads are introduced in a non-airtight furnace. The data obtained under these conditions, when heat is released to the outside world, is inaccurate. Because the furnace is non-airtight, the composition of battery gas generated during electrical and thermal failures, as well as its external release, cannot usually be measured. This is a key shortcoming of current ARC instruments on the market. Utility Model Content

[0004] On the one hand, it provides an effective solution to the problem of heat loss caused by poor airtightness of existing testers, which affects the accuracy of test data and has high time cost.

[0005] The technical problem to be solved by the present invention is that the heat loss caused by poor airtightness of the traditional ARC instrument used to measure the thermal runaway characteristics of batteries has a great impact on the test data and the time cost of the calibration cycle experiment. In view of the problems existing in the existing technology, an airtight, high-temperature resistant multifunctional tester for new energy batteries is provided.

[0006] Utility Model Overview

[0007] A multifunctional tester for new energy batteries, comprising a test tank and an upper cover, wherein the upper cover is inserted into one end of the test tank, and wherein the test tank is characterized in that: the inner and outer ends of the test tank are separated to form a test cavity and a hollow layer, and the outer wall of the test cavity is surrounded by a heating ring handle;

[0008] An outer tube sleeve is formed between the test cavity and the inner end of the upper cover, and a rotary handle tube is detachably fitted between the upper cover and the outer tube sleeve;

[0009] The upper cover is provided with a loading tray, and the loading tray is provided with an air valve tube and an external joint. The air valve tube is provided with an air pressure pipe head at one end close to the test cavity, and a pressure detector and a pump mouth tube at the other end. The external joint extends to one end of the test cavity with a collection column.

[0010] The joint between the outer tube sleeve and the end of the rotary handle tube section is larger than the diameter of the test cavity, and the end of the rotary handle tube section is a rubber ring structure, and / or a step surface is formed between the rotary handle tube and the test cavity.

[0011] A support frame is provided at the inner end of the rotary handle tube facing the test cavity, and a supporting plate is provided on the support frame relative to one end of the rotary handle tube. A screw column is fixed between the supporting plate and the upper cover, and a double-hole column bolt is bolted between the screw column and the surface of the upper cover, and the loading plate is fixed with the double-hole column bolt.

[0012] The outer wall of the test cavity is connected with a heat preservation column hole, and / or the heat preservation hole is longitudinally connected to the outer wall of the test cavity, and / or the heat preservation column hole is arranged at intervals with the heating ring handle.

[0013] The test chamber wall is formed with pipe sections by arranging the heating ring handle and the insulation column holes, and / or the pipe sections have different depths, and / or the temperature difference between the pipe sections is less than 2°C.

[0014] The heating ring handle is externally connected to a heater interface seat, and / or the heater interface seat is externally connected to an electric heater, and / or the temperature rise rate of the electric heater is 0.1-5°C / min.

[0015] An interface terminal is embedded inside the connecting end of the upper cover and the loading disk, and a collecting plate seat for docking with the external joint and the air valve pipe is provided on the interface terminal.

[0016] An isolation ring tube is sleeved between the interface terminal and the penetration end of the collection column.

[0017] A snap-fit ​​frame is fastened between the support frame and the inner wall of the rotary handle tube, and the support frame and the mica plate are used to fix the battery, and / or the battery is cylindrical, square shell or soft package.

[0018] The isolation ring tube is used for heat insulation and / or electrical insulation between the interface terminal and the collection column, and / or the hollow layer is mainly made of alloy material.

[0019] Utility Model Detailed Description

[0020] The purpose and effect of the utility model are achieved by the following specific technical means: comprising a test tank and an upper cover, the upper cover being inserted into one end of the test tank, the inner and outer ends of the test tank being separated to form a test cavity and a hollow layer, the hollow layer being mainly composed of alloy material, the outer wall of the test cavity being surrounded by a plurality of heating ring handles, the heating ring handles being externally connected to a heater interface seat;

[0021] In some embodiments, an outer tube sleeve is formed between the test cavity and the inner end of the upper cover, a rotary handle tube is threadedly engaged between the upper cover and the outer tube sleeve, and a step surface is formed between the rotary handle tube and the test cavity;

[0022] In some embodiments, a support frame is provided at the inner end of the rotary handle tube facing the test cavity, and a support plate is provided on one end of the support frame relative to the rotary handle tube, and a screw column is bolted and fixed between the support plate and the upper cover, and a double-hole column bolt is bolted between the screw column and the surface of the upper cover;

[0023] In some embodiments, the upper cover is provided with a loading plate fixed with a double-hole column bolt, and the loading plate is provided with an air valve tube and a pair of external connectors. The air valve tube is connected to an air pressure tube head at one end close to the test chamber, and is externally connected to a pressure detector and a pump mouth tube at the other end. The external connector is extended with a collection column toward one end of the test chamber.

[0024] In some embodiments, the joint between the outer tube sleeve and the end of the rotary handle tube section is larger than the diameter of the test cavity, and the end of the rotary handle tube section is a soft, high-temperature resistant rubber ring structure.

[0025] In some embodiments, a plurality of heat-insulating column holes are longitudinally connected to the outer cavity wall of the test cavity, and the heat-insulating column holes are arranged at intervals from the heating ring handle.

[0026] In some embodiments, the wall of the test chamber is formed with multiple layers of pipe sections of different depths by arranging the heating ring handle and the insulation column holes, and the temperature difference between each pipe section is less than 2°C.

[0027] In some embodiments, the heater interface seat is externally connected to an electric heater, and the temperature rise rate of the electric heater is about 0.1-about 5° C. / min.

[0028] In some embodiments, an interface terminal is embedded inside the connection end between the upper cover and the loading disk, and a collection plate seat is provided on the interface terminal for docking with the external connector and the air valve pipe.

[0029] In some embodiments, an insulating and high-temperature resistant isolation ring tube is provided between the interface terminal and the penetration end of the collection column.

[0030] In some embodiments, a snap-fit ​​frame is fastened between the support frame and the inner wall of the rotary handle tube, and the support frame is fixed to the mica plate.

[0031] Beneficial effects of the utility model:

[0032] 1. Unlike existing ARC instruments that take 2-3 days to test battery thermal runaway, this tester conducts accelerated calorimetry tests in an airtight chamber, allowing battery thermal runaway tests to be completed quickly within 6 hours. The chamber size can be tailored to the type and size of the battery while maintaining the same airtight and thermal insulation design, maintaining precise temperature and pressure measurement capabilities. Furthermore, for commercially available lithium-ion batteries of various shapes with a capacity of less than 5Ah, the tester can accurately perform thermal runaway tests on lithium-ion batteries by increasing the temperature from 30°C to 300°C at a rate of 0.1-1.0°C / min within this temperature range.

[0033] 2. The upper cover structure is mainly used as the external sealing end of the test chamber. Through the layered assembly between the upper cover, the outer tube sleeve and the rotary handle tube, the step surface between the rotary handle tube and the test chamber opening is matched. When the rotary handle tube is completely immersed in the outer tube sleeve, the test chamber opening is sealed through the structure to ensure the airtightness of the structure.

[0034] 3 Considering the targeted testing of lithium-ion batteries of various specifications and the functionality and applicability of the tester, the tester uses an assembled loading tray and support frame as the battery loading end and the data input and output connection end. The support frame, as the battery's load-bearing structure, is mainly fixed to the support frame by adhering heat-resistant tape or fixing it with mica sheets and screws. Its shape and specifications can be customized according to actual testing requirements to meet the testing experimental requirements of square batteries and soft-pack batteries. The external connector and extended collection column serve as the collection end that extends deep into the test chamber. They can be connected to the thermocouple signal line and voltage signal line respectively through the external connector, and then contact and connect with the battery under test through the extended end of the collection column. The gas valve tube is connected to the air pressure equipment through the pump port tube to set the atmospheric pressure of the test chamber and monitor it in real time through the pressure detector. At the same time, after the test, the pump port tube can be connected to the gas collection bag to collect the gas for component analysis by gas chromatography. The pressure data is helpful in providing guidance for the analysis of battery gas production components. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention will be further described below with reference to the accompanying drawings.

[0036] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0037] Figure 2 This is a schematic diagram of the exploded structure of the test tank and upper cover of the utility model;

[0038] Figure 3 This is a schematic diagram of the exploded structure of the upper cover and the loading tray of the present invention;

[0039] Figure 4 This is a schematic diagram of the internal planar structure of the test tank of the present utility model;

[0040] Figure 5 This is a schematic diagram of the internal planar structure of the upper cover of the present utility model;

[0041] Figure 6 This is a schematic diagram of the planar structure of the loading tray of the present utility model.

[0042] Figures 1-6 Middle: test tank 1, upper cover 2, loading plate 3, external connector 4, air valve tube 5, pressure detector 6, pump port tube 7, outer tube sleeve 8, test chamber 9, support frame 10, support plate 11, rotary handle tube 12, double-hole column bolt 13, collection plate seat 14, heater interface seat 15, insulation column hole 16, heating ring handle 17, interface terminal 18, snap-fit ​​frame 19, collection column 20, isolation ring tube 21, air pressure tube head 22. DETAILED DESCRIPTION

[0043] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, Figures 1-6 The present invention is further described in detail in the following embodiments. The following embodiments are merely examples of implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and improvements made without departing from the scope of the present invention are within the scope of patent protection of the present invention.

[0044] An airtight, high-temperature-resistant, multifunctional tester for new energy batteries includes a test tank 1 and an upper cover 2. The upper cover 2 is inserted into one end of the test tank 1. The inner and outer ends of the test tank 1 are separated to form a test cavity 9 and a hollow layer. The hollow layer is mainly composed of an alloy material. The outer wall of the test cavity 9 is surrounded by multiple heating ring handles 17. The heating ring handles 17 are externally connected to a heater interface seat 15.

[0045] An outer tube sleeve 8 is formed between the test cavity 9 and the inner end of the upper cover 2. A rotary handle tube 12 is threadedly fitted between the upper cover 2 and the outer tube sleeve 8, and a step surface is formed between the rotary handle tube 12 and the test cavity 9.

[0046] A support frame 10 is provided at the inner end of the handle tube 12 toward the test chamber 9. A support plate 11 is provided on the support frame 10 at one end relative to the handle tube 12. A screw column is bolted between the support plate 11 and the upper cover 2, and a double-hole stud 13 is bolted between the screw column and the surface of the upper cover 2.

[0047] The upper cover 2 is provided with a loading tray 3 fixed with a double-hole column bolt 13, and the loading tray 3 is provided with an air valve tube 5 and a pair of external connectors 4. The air valve tube 5 is connected to an air pressure pipe head 22 at one end close to the test chamber 9, and is externally connected to a pressure detector 6 and a pump port tube 7 at the other end. A collection column 20 is extended from the external connector 4 to one end of the test chamber 9;

[0048] This tester is based on the experimental method of the ARC instrument for testing battery thermal runaway. Its structure mainly uses the test chamber 9 in the test tank 1 as the sealed chamber for the test battery. The inner end of the sealed structure is separated and sealed by a combined hollow layer and the cavity structure of the test chamber 9. The hollow layer mainly provides thermal insulation and electrical insulation for the cavity structure due to the material properties of the alloy, while ensuring the uniform temperature in the cavity of the test chamber 9 during the heating process. The heating is mainly connected to the external heater interface 15 for electrical heating. The electric heating is selected according to the test temperature required by the battery to be tested, and the heating ring handle 17 serves as a contact heating structure between the electric heater and the cavity of the test chamber 9.

[0049] On the basis of the above, the upper cover 2 structure is mainly used as the external sealing end of the test cavity 9. Through the layered assembly between the upper cover 2, the outer tube sleeve 8, and the rotary handle tube 12, the step surface between the rotary handle tube 12 and the cavity opening of the test cavity 9 is matched. When the rotary handle tube 12 is completely immersed in the outer tube sleeve 8, the cavity opening of the test cavity 9 is sealed through the structure to ensure the airtightness of the structure.

[0050] Taking into account the targeted testing of lithium-ion batteries of various specifications and the functionality and applicability of the tester, the tester adopts an assembled loading tray 3 and a support frame 10 as the battery loading end and the data access and output connection end. The support frame 10 serves as the battery bearing structure and is mainly fixed and assembled with the support frame 10 by adhering with heat-resistant tape or fixing with mica sheets and screws. Its shape and specifications can be customized according to actual testing requirements to meet the testing experimental requirements of square batteries and soft-pack batteries. The external connector 4 and the extended collection column 20 serve as the collection ends deep into the test cavity 9. They can be connected to the thermocouple signal line and the voltage signal line through the external connector 4 respectively, so as to contact and connect with the battery to be tested through the extended end of the collection column 20. The air valve tube 5 is connected to the air pressure equipment through the pump port tube 7 to set the atmospheric pressure of the test cavity 9 and monitor it in real time through the pressure detector 6. At the same time, after the test is completed, the gas can be collected by connecting the pump port tube 7 to a gas collection bag for component analysis by gas chromatograph. The pressure data is helpful in providing guidance for the analysis of battery gas production components.

[0051] As mentioned above, the tester's experimental test method for testing battery thermal runaway based on the ARC instrument includes the following main steps:

[0052] Step 1: After assembly, perform thermocouple and airtightness test to confirm that the thermocouple and airtightness are normal;

[0053] Step 2: Blank test of heating system: Raise the temperature from room temperature to 30°C to 300°C at 1°C / min to confirm that the heating function is normal;

[0054] Step 3: Confirm the battery capacity;

[0055] Step 4: Charge the battery to the required capacity according to the original specifications or actual operating conditions;

[0056] Step 5: Open the upper cover 2 of the device, press the battery surface against the thermocouple with heat-resistant tape, select a mica sheet and four sets of screws, tighten the battery with the screws, place the assembled upper cover 2 into the test cavity 9, and tighten the upper cover 2 and the test cavity 9;

[0057] Step 6: Perform another full pressure test to confirm that the air tightness is normal;

[0058] Step 7: Set the starting temperature, final temperature, and heating rate of the experiment in the temperature control system according to the required test temperature range of the battery;

[0059] Step 8: After the experiment is completed, the automatically stored data will be analyzed.

[0060] Furthermore, the joint between the outer tube sleeve 8 and the end of the rotary handle tube 12 is larger than the diameter of the test cavity 9, and the end of the rotary handle tube 12 is a soft, high-temperature resistant rubber ring structure. The customized soft, high-temperature resistant rubber ring structure serves as the contact end between the rotary handle tube 12 and the cavity opening of the test cavity 9. The soft structural characteristics ensure the tightness of the connection between the rotary handle tube 12 and the test cavity 9, thereby improving the airtightness of the rotary handle tube 12 and the test cavity 9;

[0061] Furthermore, a plurality of insulation column holes 16 are longitudinally connected to the outer wall of the test cavity 9, and the insulation column holes 16 are spaced apart from the heating ring handles 17. The insulation column holes 16 provide thermal isolation between adjacent heating ring handles 17 by separating the filling material of the hollow layer, thereby reducing heat transfer and ensuring the accuracy of cavity temperature control.

[0062] At the same time, the wall of the test chamber 9 is formed with multiple layers of pipe sections of different depths through the arrangement of the heating ring handles 17 and the insulation column holes 16. The temperature difference between each pipe section is less than 2°C, further limiting the hardware support for the temperature control end of the heater in the test chamber 9. The layered structure of the heating ring handles 17 and the insulation column holes 16 facilitates the accurate thermal compensation of the heater.

[0063] On the basis of the above, the heater interface seat 15 is externally connected to an electric heater, and the temperature rise rate of the electric heater is 0.1-5°C / min. By controlling the temperature rise rate of the heater, temperature control support is provided for low-capacity lithium-ion batteries to improve the applicability of the tester;

[0064] Furthermore, an interface terminal 18 is embedded inside the connection end between the upper cover 2 and the loading tray 3. A collection plate seat 14 is provided on the interface terminal 18, which interfaces with the external connector 4 and the air valve tube 5. An insulating and high-temperature resistant isolation ring tube 21 is sleeved between the interface terminal 18 and the penetration end of the collection column 20. The isolation ring tube 21, which is connected through the penetration, serves as the cable end of the external connector 4. Its insulating and high-temperature resistant properties provide safe support for the ends of the external connector 4 and the collection column 20 that penetrate into the test cavity 9.

[0065] Furthermore, a snap-fit ​​frame 19 is snap-fitted and fixed between the support frame 10 and the inner wall of the handle tube 12. The support frame 10 and the mica plate use the snap-fit ​​frame 19 as a detachable fixed end of the support frame 10 to provide structural support for subsequent replacement of the specifications of the support frame 10.

Claims

1. A multifunctional tester for new energy batteries, comprising a test tank and an upper cover, wherein the upper cover is inserted into one end of the test tank, characterized in that: The inner and outer ends of the test tank are separated to form a test cavity and a hollow layer, and the outer wall of the test cavity is surrounded by a heating ring handle; An outer tube sleeve is formed between the test cavity and the inner end of the upper cover, and a rotary handle tube is detachably fitted between the upper cover and the outer tube sleeve; The upper cover is provided with a loading tray, and the loading tray is provided with an air valve tube and an external joint. The air valve tube is provided with an air pressure pipe head at one end close to the test cavity, and a pressure detector and a pump mouth tube at the other end. The external joint extends to one end of the test cavity with a collection column.

2. The multifunctional tester for new energy batteries according to claim 1, characterized in that: The joint between the outer tube sleeve and the end of the rotary handle tube section is larger than the diameter of the test cavity, and the end of the rotary handle tube section is a rubber ring structure, and / or a step surface is formed between the rotary handle tube and the test cavity.

3. The multifunctional tester for new energy batteries according to any one of claims 1 or 2, characterized in that: A support frame is provided at the inner end of the rotary handle tube facing the test cavity, and a support plate is provided on the support frame relative to one end of the rotary handle tube. A screw column is fixed between the support plate and the upper cover, and a double-hole column bolt is bolted between the screw column and the surface of the upper cover, and the loading plate is fixed with the double-hole column bolt.

4. The multifunctional tester for new energy batteries according to claim 1, characterized in that: The outer wall of the test cavity is connected with a heat preservation column hole, and / or the heat preservation hole is longitudinally connected to the outer wall of the test cavity, and / or the heat preservation column hole is arranged at intervals with the heating ring handle.

5. The multifunctional tester for new energy batteries according to claim 4, characterized in that: The test chamber wall is formed with pipe sections by arranging the heating ring handle and the insulation column holes, and / or the pipe sections have different depths, and / or the temperature difference between the pipe sections is less than 2°C.

6. The multifunctional tester for new energy batteries according to claim 1, characterized in that: The heating ring handle is externally connected to a heater interface seat, and / or the heater interface seat is externally connected to an electric heater, and / or the temperature rise rate of the electric heater is 0.1-5°C / min.

7. The multifunctional tester for new energy batteries according to claim 1, characterized in that: An interface terminal is embedded inside the connecting end of the upper cover and the loading disk, and a collecting plate seat for docking with the external joint and the air valve pipe is provided on the interface terminal.

8. The multifunctional tester for new energy batteries according to claim 7, characterized in that: An isolation ring tube is sleeved between the interface terminal and the penetration end of the collection column.

9. The multifunctional tester for new energy batteries according to claim 3, characterized in that: A snap-fit ​​frame is fastened between the support frame and the inner wall of the rotary handle tube, and the support frame and the mica plate are used to fix the battery, and / or the battery is cylindrical, square shell or soft package.

10. The multifunctional tester for new energy batteries according to claim 8, characterized in that: The isolation ring tube is used for heat insulation and / or electrical insulation between the interface terminal and the collection column, and / or the hollow layer is mainly made of alloy material.

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