CN110954835A

CN110954835A - Test device for effectively testing thermal runaway

Info

Publication number: CN110954835A
Application number: CN201911302729.3A
Authority: CN
Inventors: 李鑫; 宗庆生; 李世明; 穆骏峰
Original assignee: Jiangxi Yotteo Auto Technology Co ltd
Current assignee: Jiangxi Yotteo Auto Technology Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-04-03

Abstract

The invention discloses a test device for effectively testing thermal runaway, which comprises a box body and a battery module, wherein the battery module is placed in the box body, a temperature sensor, an air pressure sensor and a gas sensor are arranged on the inner side of the box body, a heating cavity is arranged at the bottom of the box body, an electric heating wire is arranged in the heating cavity, the top of the heating cavity is communicated with a through pipe, the through pipe is communicated with the inside of the box body, and a box cover is hinged to the top of the box body. Through inside atmospheric pressure and the temperature of temperature sensor, baroceptor, gas sensor detection box, in the voltage and the temperature acquisition of battery module itself, contrast, test system's the just easy nature, the structure is simple and easy, easily assembles and realizes, and the cost has had to a great extent reduction for whole package experiment simultaneously, and gas sensor carries out the gas composition and detects, the time of the emergence of prediction thermal runaway.

Description

Test device for effectively testing thermal runaway

Technical Field

The invention relates to the technical field of battery manufacturing, in particular to a test device for effectively testing thermal runaway.

Background

The lithium ion power battery is used as a main flow power source of the electric automobile and has the characteristic of high specific energy. At present, the power batteries for the automobiles mostly adopt a large number of small-capacity batteries to carry out series-parallel connection grouping so as to meet the requirement of high energy. Therefore, the safety problem of the automobile power battery system is not only the safety problem of a single battery, but also the safety problem of battery grouping.

The current means for triggering thermal runaway of the battery are mainly overcharge, heating and needling. However, through experiments, the stability of the thermal runaway triggered by acupuncture is poor, the thermal runaway cannot be triggered frequently, the realizability is poor, and a needed triggering device is relatively complex; triggering thermal runaway through overcharge has good stability and high success rate, but has poor safety, needs to be carried out in a charging mode, and is not beneficial to the safe operation of tests.

Disclosure of Invention

The invention aims to provide a test device for effectively testing thermal runaway, which detects the air pressure and temperature in a box body through a temperature sensor, an air pressure sensor and a gas sensor, collects and compares the voltage and temperature of a battery module, has simple structure, is easy to assemble and realize, greatly reduces the cost relative to a whole-pack test, and detects the gas components by the gas sensor to indicate the time of the thermal runaway.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an effective test thermal runaway's test device, includes box and battery module, the battery module is placed in the inside of box, temperature sensor, baroceptor and gas sensor are installed to the inboard of box, the bottom of box is equipped with the heating chamber, the internally mounted in heating chamber has the heating wire, the top intercommunication in heating chamber has the siphunculus, the siphunculus is linked together with the inside of box, the top of box articulates there is the case lid, install assorted hasp lock on the tip of case lid and the box.

Preferably, a sealing gasket is bonded to the top of the box body.

Preferably, one side of the box body is provided with a wire hole, and a wire pipe is arranged in the wire hole.

Preferably, the bottom of the heating cavity is provided with a heat insulation plate.

Preferably, explosion-proof valves are installed on one side of the box body, and at least three groups of explosion-proof valves are arranged.

Preferably, the top of the box cover is provided with an observation window, and a transparent PVC plate is arranged inside the observation window.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention mainly comprises a box body, a temperature sensor, a gas pressure sensor, a gas sensor, an electric heating wire and other components, wherein the temperature sensor, the gas pressure sensor and the gas sensor are used for detecting the gas pressure and the temperature in the box body, and the voltage and the temperature of the battery module are acquired and compared;

2. the heating cavity is arranged at the bottom of the box body, the box body can be heated through the electric heating wire, the temperature in the box body is artificially controlled, and the test efficiency is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the case cover in a closed state according to the present invention;

FIG. 3 is a schematic side sectional view of the case according to the present invention.

In the figure: 1. a box body; 2. an explosion-proof valve; 3. a battery module; 4. a temperature sensor; 5. an air pressure sensor; 6. a gas sensor; 7. a heating cavity; 8. an electric heating wire; 9. pipe passing; 10. a box cover; 11. a hasp lock; 12. a gasket; 13. a heat insulation plate; 14. a wire hole; 15. a conduit; 16. an observation window; 17. a transparent PVC sheet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a technical solution: a test device for effectively testing thermal runaway comprises a box body 1 and a battery module 3, wherein the battery module 3 is arranged in the box body 1, a temperature sensor 4 (with the model of LM-PT100), a pressure sensor 5 (with the model of 4-20mA) and a gas sensor 6 (with the model of MQ-135) are arranged on the inner side of the box body 1, the working principle of which is the prior art and will not be described herein, the temperature sensor 4 is transmitted to a temperature monitor (not shown) through a transmission line, the real-time temperature and the temperature rise curve of the monitoring point are displayed through a display screen of the temperature detector, and according to the temperature rise curve, the battery module 3 can be judged whether thermal runaway occurs or not, the air pressure sensor 5 is transmitted to the air pressure meter through the transmission line to detect the air pressure in the box body 1, and the gas sensor 6 is transmitted to the gas analyzer through the transmission line to analyze gas components and predict the time of the thermal runaway;

the bottom of box 1 is equipped with heating chamber 7, the internally mounted who heats chamber 7 has heating wire 8, this heating wire 8 carries out the control heating through the temperature controller, the top intercommunication of heating chamber 7 has siphunculus 9, siphunculus 9 is linked together with box 1's inside, box 1's top articulates there is case lid 10, install assorted hasp 11 on the tip of case lid 10 and the box 1, when detecting, fix case lid 10 on box 1 through hasp 11, it has sealed pad 12 to bond at box 1's top, be favorable to improving the leakproofness between case lid 10 and the box 1.

Wire hole 14 has been seted up in one side of box 1, wire hole 14's internally mounted has spool 15, this wire hole 14, spool 15 is convenient for the connecting wire and stretches into in the box 1, bottom at heating chamber 7 is equipped with heat insulating board 13, this heat insulating board 13 is made by the glass fiber material, improve thermal-insulated effect, box 1 is by the sheet metal component, possess the intensity design more than 2 times, install the inside gaseous eruption that probably arouses when three explosion-proof valves of group 2 come to prevent pressure increase simultaneously, observation window 16 has been seted up at the top of case lid 10, the internally mounted of observation window 16 has transparent PVC board 17, this transparent PVC board 17 is convenient for observe the inside condition of box 1.

The working principle is as follows: during the use, put into box 1 with battery module 3, can heat in to box 1 through heating wire 8, carry out the temperature in the artificial control box 1, through temperature sensor 4, baroceptor 5, detect the inside atmospheric pressure and the temperature of box 1, compare with the voltage and the temperature of battery module 3 itself, test system's just easy nature, the structure is simple and easy, easily assembly and realization, the cost has very big degree of reduction for whole package is experimental simultaneously, gas sensor 6 carries out the gas composition and detects, indicate the time that thermal runaway takes place.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an effective test thermal runaway's test device, includes box (1) and battery module (3), its characterized in that: battery module (3) are placed in the inside of box (1), temperature sensor (4), baroceptor (5) and gas sensor (6) are installed to the inboard of box (1), the bottom of box (1) is equipped with heating chamber (7), the internally mounted of heating chamber (7) has heating wire (8), the top intercommunication of heating chamber (7) has siphunculus (9), siphunculus (9) are linked together with the inside of box (1), the top of box (1) articulates there is case lid (10), install assorted hasp lock (11) on the tip of case lid (10) and box (1).

2. The testing apparatus for testing thermal runaway of claim 1, wherein: the top of the box body (1) is bonded with a sealing gasket (12).

3. The testing apparatus for testing thermal runaway of claim 1, wherein: a line hole (14) is formed in one side of the box body (1), and a line pipe (15) is arranged inside the line hole (14).

4. The testing apparatus for testing thermal runaway of claim 1, wherein: and a heat insulation plate (13) is arranged at the bottom of the heating cavity (7).

5. The testing apparatus for testing thermal runaway of claim 1, wherein: explosion-proof valve (2) are installed to one side of box (1), explosion-proof valve (2) are equipped with three groups at least.

6. The testing apparatus for testing thermal runaway of claim 1, wherein: an observation window (16) is arranged at the top of the box cover (10), and a transparent PVC plate (17) is arranged inside the observation window (16).