CN210199273U

CN210199273U - Thermal runaway testing machine

Info

Publication number: CN210199273U
Application number: CN201921059766.1U
Authority: CN
Inventors: Haizhen Lin; 林海珍; Kejun Cui; 崔克军
Original assignee: Guangdong Bell Test Equipment Co Ltd
Current assignee: Guangdong Bell Test Equipment Co Ltd
Priority date: 2019-07-07
Filing date: 2019-07-07
Publication date: 2020-03-27
Anticipated expiration: 2029-07-07

Abstract

The utility model relates to the technical field of test equipment, in particular to a thermal runaway tester, which comprises a control system, an explosion-proof box and a test host, wherein the surface of the explosion-proof box is provided with a manual control panel, the explosion-proof box is internally provided with an inner box, the back of the inner box is provided with a pressure relief door, the inner box is internally provided with a heating device, the upper part of the inner box is provided with a temperature sensor, a video monitor and an air blower, the test host comprises an industrial computer, a programmable direct current power supply, a PLC and a solid-state relay, the explosion-proof box is adopted to place a tested battery core, the explosion danger which can happen after the thermal runaway happens is reduced, the device adopts a heating mode with various modes, can carry out thermal runaway simulation tests aiming at various scenes, improves the accuracy of simulating the thermal runaway actual field of the tested battery, further improves the test accuracy, and the control system is matched, the influence test of group battery fuel effect under the different charge-discharge multiplying power is realized, and data acquisition is accurate, convenient to use.

Description

Thermal runaway testing machine

The technical field is as follows:

the utility model relates to a test equipment technical field refers in particular to thermal runaway testing machine.

Background art:

with the increasing demand of people on the endurance mileage of new energy automobiles, the energy density of the ion power battery is higher and higher. The lithium ion battery is used as an energy storage and conversion device, and the potential safety hazard caused by the larger energy density is higher and higher. In recent years, accidents caused by the safety problem of the battery are all the same, the consequences caused by a plurality of problems are striking, and with the increasing production and sales of new energy automobiles, the number of ignition accidents is increasing, and people have achieved unprecedented attention to the safety of the battery.

Based on the above background, factors such as heat productivity, temperature rise, total amount of released gas and the like after thermal runaway of the battery core need to be considered for protection of the power battery, so as to determine selection of materials of the passive protection part, design of space size, design of heat dissipation holes and the like. However, thermal runaway test equipment in the prior art cannot perform simulation tests on various conditions due to single design, and the obtained detection data is not accurate due to the fact that simulation test scenes do not meet the requirements, and the thermal runaway test equipment also has explosion risks.

The utility model has the following contents:

the utility model aims at prior art not enough, and the thermal runaway testing machine that provides, its structural design science, adopt explosion-proof box to place the battery core of being tested, reduce the explosion danger that probably takes place after taking place the thermal runaway, equipment adopts the heating methods of multimode, can carry out the thermal runaway analogue test to multiple scene, the accuracy to being surveyed battery thermal runaway actual field simulation has been improved, thereby experimental accuracy has further been improved, the supporting industrial computer of control system adopts complete set comprehensive parameter automatic test system, realize the influence test of group battery fuel factor under the different charge-discharge multiplying powers, data acquisition is accurate, high durability and convenient use.

For realizing the above-mentioned purpose, the utility model discloses a following technical scheme, thermal runaway testing machine includes control system, explosion-proof case and experimental host computer, explosion-proof case surface is equipped with manual control panel, explosion-proof incasement portion is equipped with the inner box, the front of inner box is equipped with the explosion door, be equipped with perspective window in the middle of the explosion door, the back of inner box is equipped with the pressure relief door, the inside of inner box is equipped with heating device, the upper portion of inner box is equipped with temperature sensor, video monitor and air-blower, temperature sensor, video monitor sees through inside the top surface of inner box extends to the inner box, experimental host computer is including industrial computer, DC power supply able to programme, PLC, solid state relay.

The temperature sensor, the video monitor and the PLC are electrically connected, the heating device, the blower and the solid-state relay are electrically connected, the programmable direct-current power supply and the solid-state relay are electrically connected with the PLC, and the PLC is electrically connected with the industrial computer.

The inner box is made of stainless steel materials, the shape of the heating device is any one of a plane shape, a rod shape and a soft heating wire, and an insulating layer is coated on the surface of the heating device.

The utility model discloses beneficial effect does: the thermal runaway testing machine comprises a control system, an explosion-proof box and a testing host, wherein a manual control panel is arranged on the surface of the explosion-proof box, an inner box is arranged in the explosion-proof box, an explosion-proof door is arranged on the front surface of the inner box, a perspective window is arranged in the middle of the explosion-proof door, a pressure relief door is arranged on the back of the inner box, a heating device is arranged in the inner box, a temperature sensor, a video monitor and an air blower are arranged on the upper portion of the inner box, the temperature sensor and the video monitor penetrate through the top surface of the inner box and extend into the inner box, the testing host comprises an industrial computer, a programmable direct current power supply, a PLC and a solid-state relay, a tested battery core is placed in the explosion-proof box, the explosion danger which can occur after thermal runaway is reduced, the equipment adopts a heating mode with multiple modes, thermal runaway simulation tests can be carried out aiming at multiple scenes, the control system is matched with an industrial computer, a complete set of comprehensive parameter automatic test system is adopted, the influence test of the battery pack heat effect under different charging and discharging multiplying powers is realized, the data acquisition is accurate, and the use is convenient.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the explosion-proof tank of the present invention;

FIG. 3 is a schematic diagram of the testing host of the present invention;

fig. 4 is a schematic diagram of the control system of the present invention.

The specific implementation mode is as follows:

referring to fig. 1 to 4, the thermal runaway testing machine of the utility model comprises a control system, an explosion-proof box 1 and a testing host 11, wherein the surface of the explosion-proof box 1 is provided with a manual control panel 2, an inner box 5 is arranged inside the explosion-proof box 1, the front of the inner box 5 is provided with an explosion door 3, a transparent window 4 is arranged in the middle of the explosion door 3, the back of the inner box 5 is provided with a pressure relief door 6, the inside of the inner box 5 is provided with a heating device 7, the upper part of the inner box 5 is provided with a temperature sensor 8, a video monitor 9 and an air blower 10, the temperature sensor 8 and the video monitor 9 extend to the inside of the inner box 5 through the top surface of the inner box 5, the testing host 11 comprises an industrial computer 12, a programmable direct current power supply 13, a PLC14 and a solid state relay 15, the state of the inner box 5 can be monitored at any time through the video monitor 9, the, effectively and timely treat the thermal runaway problem and can quickly discharge smoke when explosive smoke is generated.

The temperature sensor 8 and the video monitor 9 are electrically connected with the PLC14, the heating device 7 and the blower 10 are electrically connected with the solid-state relay 15, the programmable direct-current power supply 13 and the solid-state relay 15 are electrically connected with the PLC14, and the PLC14 is electrically connected with the industrial computer 12.

The inner box 5 is made of stainless steel materials, the shape of the heating device 7 is any one of a plane shape, a rod shape and a soft heating wire, and an insulating layer is coated on the surface of the heating device 7.

Adopt explosion-proof box to place the battery core of being tested, reduce the explosion danger that probably takes place after taking place thermal runaway, equipment adopts the heating methods of multimode, can carry out thermal runaway analogue test to multiple scene, the accuracy of being surveyed battery thermal runaway actual field simulation has been improved, thereby experimental accuracy has further been improved, the supporting industrial computer of control system adopts complete set comprehensive parameter automatic test system, realize the influence test of group battery fuel factor under the different charge-discharge multiplying power, data acquisition is accurate, high durability and convenient use.

The test flow comprises the following steps:

the overcharge triggering thermal runaway process is as follows

Placing a test battery into the inner box 5 of the explosion-proof box, connecting the positive electrode and the negative electrode of the programmable direct current power supply 13 with the battery, starting the equipment, starting a system to set test parameters (the minimum is 1/3C, and the maximum current which does not exceed the normal working range specified by a battery manufacturer is charged to 200% SOC), starting a test, and charging the programmable direct current power supply 13 by the set current; and when the electric quantity reaches 200% SOC, stopping charging, and observing the test result after the battery is placed for 1H.

The thermal runaway process triggered by heating is as follows

The test battery is put into the explosion-proof box inner box 5, the positive negative pole of the direct current power supply 13 able to programme connects the battery, the equipment is started, open the system and set up the test parameter (after charging the test object to SOC 100%, continue charging 12Min with 1C electric current to the test object again), start heating device 7, carry out continuous heating to the test object with its maximum power, when temperature sensor 8 detects that thermal runaway takes place or the monitoring point temperature of A.3.2 definition reaches 300 ℃, stop triggering, close heating device 7, start the test, the charging unit charges with the electric current that sets up, after 12Min, start heating device and heat, decide whether the condition of thermal runaway takes place: a. and (b) the temperature of a measuring point reaches the highest working temperature specified by a battery manufacturer, and c) the temperature rise rate dT/dT of the measuring point is more than or equal to 1 ℃/s, and when a) and c) or b) and c) occur, thermal runaway is judged to occur.

The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.

Claims

1. Thermal runaway testing machine, including control system, explosion-proof case (1) and test host computer (11), its characterized in that: the surface of the explosion-proof box (1) is provided with a manual control panel (2), an inner box (5) is arranged inside the explosion-proof box (1), an explosion door (3) is arranged on the front side of the inner box (5), a transparent window (4) is arranged in the middle of the explosion door (3), a pressure relief door (6) is arranged at the back of the inner box (5), a heating device (7) is arranged inside the inner box (5), the upper portion of the inner box (5) is provided with a temperature sensor (8), a video monitor (9) and an air blower (10), the temperature sensor (8), the video monitor (9) penetrates through the top surface of the inner box (5) and extends to the inside of the inner box (5), and the test host (11) comprises an industrial computer (12), a programmable direct current power supply (13), a PLC (14) and a solid-.

2. The thermal runaway testing machine of claim 1, wherein: the temperature sensor (8) and the video monitor (9) are electrically connected with the PLC (14), the heating device (7) and the air blower (10) are electrically connected with the solid-state relay (15), the programmable direct-current power supply (13) and the solid-state relay (15) are electrically connected with the PLC (14), and the PLC (14) is electrically connected with the industrial computer (12).

3. The thermal runaway testing machine of claim 1, wherein: the inner box (5) is made of stainless steel materials, the shape of the heating device (7) is any one of a plane shape, a rod shape and a soft heating wire, and an insulating layer is coated on the surface of the heating device (7).