CN216209742U

CN216209742U - Test equipment

Info

Publication number: CN216209742U
Application number: CN202122292026.6U
Authority: CN
Inventors: 冷利民; 喻聪; 吴洁; 徐中领; 张耀
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-04-05
Anticipated expiration: 2031-09-22

Abstract

The utility model provides a test device, which is used for detecting a battery to be tested and comprises: the sealing box is provided with a containing cavity for containing the battery to be tested, and the battery to be tested can be fixed in the sealing box; the puncture device is fixedly connected with the seal box and comprises a puncture part for puncturing the battery to be tested, and at least part of the puncture part is movably arranged in the accommodating cavity; the data acquisition device can acquire the gas information in the seal box, and the data acquisition device is electrically connected with the battery to be tested so as to acquire the voltage information of the battery to be tested in the accommodating cavity. The test equipment solves the problem that the pressure release valve of the battery in the prior art is difficult to select.

Description

Test equipment

Technical Field

The utility model relates to the field of batteries, in particular to a test device.

Background

Common commercial lithium ion batteries generally adopt various safety protection mechanisms, wherein the most critical protection is to arrange a directional pressure relief explosion-proof valve on the battery. When serious electrical and thermal faults or destructive mechanical faults occur, the pressure release valve is used as a pressure release channel to prevent high temperature and high pressure which cause catastrophic accidents in the battery.

Currently, the quantification of the diameter and cross-sectional area of pressure relief devices required to release gas in the event of thermal runaway in electrical, thermal, and mechanical abuse conditions for different size and chemical system batteries still lacks a reliable assessment method and system.

Therefore, the safety and reliability of the existing battery relief valve model selection design method and system to the battery system need to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a testing device to solve the problem that a pressure release valve of a battery in the prior art is difficult to select.

In order to achieve the above object, according to one aspect of the present invention, there is provided a test apparatus for testing a battery to be tested, the test apparatus including: the sealing box is provided with an accommodating cavity for accommodating the battery to be tested, and the battery to be tested can be fixed in the sealing box; the puncture device is fixedly connected with the seal box and comprises a puncture part for puncturing the battery to be tested, and at least part of the puncture part is movably arranged in the accommodating cavity; the data acquisition device can acquire the gas information in the seal box, and the data acquisition device is electrically connected with the battery to be tested so as to acquire the voltage information of the battery to be tested in the accommodating cavity.

Further, the test equipment further comprises a carrier gas device, wherein the carrier gas device comprises: the air extracting part is connected with the sealing box to extract the air in the accommodating cavity; and the air supply part is connected with the sealing box to supply air to the accommodating cavity.

Further, the carrier gas device includes: one end of the first pipeline is communicated with the accommodating cavity, the other end of the first pipeline is connected with a first branch pipeline and a second branch pipeline, the first branch pipeline is connected with the air exhaust part, and the second branch pipeline is connected with the air supply part; the first pipeline valve is arranged on the first branch pipeline; and the second pipeline valve is arranged on the second branch pipeline.

Further, affiliated seal box includes apron subassembly and box, and the apron subassembly lid is established on the box in order to form and holds the cavity, and the apron subassembly includes: the cover plate is covered on the box body; the pressure relief valve is arranged on the cover plate and used for releasing gas in the accommodating cavity; the data acquisition device is connected with the electrode of the battery to be detected through the first wiring terminal so as to acquire voltage information of the battery to be detected; the first ball valve is arranged on the cover plate and communicated with the accommodating cavity so as to supply air to the accommodating cavity or discharge the air in the accommodating cavity through the first ball valve; the second ball valve is arranged on the cover plate, and an air bag used for collecting gas in the accommodating cavity is connected to the second ball valve.

Further, the seal box includes: the observation window is arranged on the side wall of the box body; the electrical window is arranged on the side wall of the box body and opposite to the observation window, and a second wiring terminal is arranged on the electrical window and used for being connected with an electrode of the battery to be tested so as to supply power to the battery to be tested.

Further, the observation window 104 includes a circular through hole provided on a side wall of the case 102.

Further, the box 102 has an inner cavity 1021 therein, and the inner cavity 1021 is a cylindrical structure.

Further, ceramic heat-insulating coatings are arranged on the inner walls of the cover plate and the box body.

Further, the puncture device includes: the containing cylinder body is fixedly connected with the seal box; the driving motor is arranged in the accommodating cylinder body, and an output shaft of the driving motor is connected with a connecting rod; the connecting rod sleeve is connected with the driving motor, the connecting rod and the connecting rod sleeve are connected in a relatively movable mode so as to drive the connecting rod to move relative to the connecting rod sleeve through rotation of an output shaft of the driving motor, and the puncture part is arranged at one end, far away from the driving motor, of the connecting rod; the force sensor is arranged at one end, far away from the driving motor, of the connecting rod, and the puncture part is arranged at one side, far away from the connecting rod, of the force sensor.

Further, the data acquisition device includes: the temperature sensor is arranged in the accommodating cavity to collect temperature information in the accommodating cavity; and/or, the atmospheric pressure sensor, atmospheric pressure sensor sets up on the seal box to the atmospheric pressure information that holds in the cavity is gathered.

By applying the technical scheme of the utility model, the test equipment is used for detecting the battery to be tested, and comprises the following components: the sealing box comprises a containing cavity for containing the battery to be tested; the puncture device is fixedly connected with the seal box and comprises a puncture part for puncturing the battery to be tested, and at least part of the puncture part is movably arranged in the accommodating cavity; the data acquisition device can acquire the gas information in the seal box, and the data acquisition device is electrically connected with the battery to be tested so as to acquire the voltage information of the battery to be tested in the accommodating cavity. Adopt above-mentioned setting, when carrying out the thermal runaway test of battery, fix the battery that awaits measuring in holding the cavity of seal box, puncture the battery through drive piercing depth's piercing depth to make the battery be in the thermal runaway state, the gas storage that the battery that awaits measuring released from the relief valve is in the seal box. Therefore, the voltage of the battery to be tested and the state information of the released gas are collected through the detection data acquisition device, and the size of the pressure relief valve of the battery to be tested is selected through analyzing data. The problem of the relief valve type selection difficulty of battery among the prior art is solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 shows a schematic structural view of a first embodiment of a test apparatus according to the present invention;

FIG. 2 shows a schematic diagram of the operation of the test apparatus of the present invention of FIG. 1;

FIG. 3 shows a schematic representation of the operation of a second embodiment of the test apparatus of the present invention; and

figure 4 shows a schematic representation of the operation of a third embodiment of the test apparatus of the present invention.

Wherein the figures include the following reference numerals:

10. a sealing box; 101. a cover plate assembly; 1011. a cover plate; 102. a box body; 1021. an inner cavity; 103. a second connection terminal; 1030. an appliance window; 104. an observation window; 105. a first connection terminal; 106. a first ball valve; 107. a pressure relief valve; 108. a second ball valve; 109. an air bag;

20. a puncture device; 201. a drive motor; 202. an accommodation cylinder; 203. a connecting rod sleeve; 204. a connecting rod; 205. a force sensor; 110. a puncturing member;

502. a data acquisition device; 501. an air pressure sensor; 80. a temperature sensor; 801. a second temperature sensor; 802. a third temperature sensor; 803. a fourth temperature sensor; 804. a first temperature sensor;

70. a carrier gas device; 701. a first pipeline; 7011. a first branch line; 7012. a second branch line; 702. a first pipeline valve; 703. a second pipeline valve; 704. a gas supply part; 705. an air extraction part;

60. carrying a trailer; 100. an insulating support; 90. and (5) a battery to be tested.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The test equipment of this embodiment is used for detecting the battery 90 to be tested, and the test equipment includes: the battery testing device comprises a sealing box 10, wherein the sealing box 10 is provided with a containing cavity for containing a battery 90 to be tested, and the battery 90 to be tested can be fixed in the sealing box 10; the puncturing device 20, the puncturing device 20 is fixedly connected with the sealing box 10, the puncturing device 20 comprises a puncturing part 110 for puncturing the battery 90 to be tested, and at least part of the puncturing part 110 is movably arranged in the accommodating cavity; data acquisition device 502, data acquisition device 502 can gather the gaseous information in the seal box 10, and data acquisition device 502 is connected with the battery 90 that awaits measuring is electric to gather the voltage information of the battery 90 that awaits measuring that holds in the cavity. With the above arrangement, when a thermal runaway test of the battery is performed, the battery 90 to be tested is fixed in the accommodating cavity of the sealed box 10, and the battery is punctured by driving the puncturing part 110 of the puncturing device 20, so that the battery is in a thermal runaway state, and gas released by the battery 90 to be tested from the pressure release valve is stored in the sealed box 10. In this way, the voltage of the battery 90 to be tested and the state information of the released gas are collected by the detection data collection device 502, so that the size of the pressure relief valve of the battery 90 to be tested is selected by analyzing the data. The problem of the relief valve type selection difficulty of battery among the prior art is solved.

Referring to fig. 1 to 4, in the test apparatus of the present embodiment, the test apparatus further includes a carrier gas device 70, and the carrier gas device 70 includes: an air extracting part 705, wherein the air extracting part 705 is connected with the sealing box 10 to extract the air in the accommodating cavity; and a gas supply part 704, wherein the gas supply part 704 is connected with the sealed box 10 to supply gas into the accommodating cavity.

In the test apparatus of the present embodiment, referring to fig. 1 to 4, the carrier gas device 70 includes: a first pipeline 701, one end of the first pipeline 701 is communicated with the accommodating cavity, the other end of the first pipeline 701 is connected with a first branch pipeline 7011 and a second branch pipeline 7012, the first branch pipeline 7011 is connected with an air exhaust part 705, and the second branch pipeline 7012 is connected with an air supply part 704; a first pipe valve 702, the first pipe valve 702 disposed on the first branch line 7011; a second pipe valve 703, the second pipe valve 703 being provided on the second branch pipe 7012. By adopting the arrangement, the structure of the test equipment is reduced, and the cost is saved.

Referring to fig. 1 to 4, in the testing apparatus of the present embodiment, the hermetic container 10 includes a cover plate assembly 101 and a container body 102, the cover plate assembly 101 is covered on the container body 102 to form a receiving cavity, and the cover plate assembly 101 includes: the cover plate 1011 is arranged on the box body 102 in a covering mode, the pressure release valve 107 is arranged on the cover plate 1011, and the pressure release valve 107 is used for releasing gas in the accommodating cavity; the first connecting terminal 105 is arranged on the cover plate 1011, and the data acquisition device 502 is connected with the electrode of the battery 90 to be tested through the first connecting terminal 105 so as to acquire the voltage information of the battery 90 to be tested; the first ball valve 106 is arranged on the cover plate 1011, and the first ball valve 106 is communicated with the accommodating cavity so as to supply gas into the accommodating cavity or discharge the gas in the accommodating cavity through the first ball valve 106; and the second ball valve 108 is arranged on the cover plate 1011, and an air bag 109 for collecting gas in the accommodating cavity is connected to the second ball valve 108.

In the test apparatus of the present embodiment, referring to fig. 1 to 4, the seal box 10 includes: an observation window 104 arranged on the side wall of the box body 102; the electrical window 1030, the electrical window 1030 is arranged on the side wall of the box body 102, the electrical window 1030 and the observation window 104 are arranged oppositely, a second wiring terminal 103 is arranged on the electrical window 1030, and the second wiring terminal 103 is used for being connected with an electrode of the battery 90 to be tested so as to supply power to the battery 90 to be tested.

Referring to fig. 1 to 4, in the test apparatus of the present embodiment, a ceramic thermal barrier coating is provided on both the cover plate 1011 and the inner wall of the case 102. In this way, the test device is made more robust.

In the test apparatus of the present embodiment, referring to fig. 1 to 4, the puncture device 20 includes: the accommodating cylinder 202, the accommodating cylinder 202 is fixedly connected with the seal box 10; the driving motor 201, the driving motor 201 is set up in holding the cylinder block 202, connect with the brace rod 204 on the output shaft of the driving motor 201; the connecting rod sleeve 203, the connecting rod sleeve 203 is connected with the driving motor 201, and the connecting rod 204 is connected with the connecting rod sleeve 203 in a relatively movable manner so as to drive the connecting rod 204 to move relative to the connecting rod sleeve 203 through the rotation of the output shaft of the driving motor 201; a force sensor 205, wherein the force sensor 205 is arranged at one end of the connecting rod 204 far away from the driving motor 201, and the puncture part 110 is arranged at one end of the force sensor 205 far away from the connecting rod 204. Above-mentioned setting, the structure is reliable to can guarantee that the battery 90 that awaits measuring is in sealed environment.

Specifically, the force sensor 205 in the present embodiment is a pressure sensor, and measures the force of the penetration member 110 penetrating the battery 90 to be measured by measuring the reaction force of the penetration member 110 acting on the pressure sensor when penetrating the battery 90 to be measured.

Referring to fig. 1 to 4, in the test apparatus of the present embodiment, the data acquisition device 502 includes: the temperature sensor 80 is arranged in the accommodating cavity to collect temperature information in the accommodating cavity; and/or, the air pressure sensor 501 is arranged on the seal box 10 to collect the air pressure information in the accommodating cavity.

In the testing apparatus of the present embodiment, referring to fig. 1 to 4, a plurality of temperature sensors 80 are provided, and the plurality of temperature sensors 80 are arranged in the accommodating cavities at intervals; and/or, temperature sensor 80 sets up in the one side that the battery 90 that awaits measuring is kept away from to the pressure release discharge valve, and temperature sensor 80 is 2mm with the distance of pressure release discharge valve. In this way, the test of the test equipment is more accurate.

Referring to fig. 1 to 4, in the test apparatus of the present embodiment, the test apparatus further includes: the carrying trailer 60, the seal box 10, the puncture device 20 and the data acquisition device 502 are all arranged on the carrying trailer 60; and/or the insulating support 100, the insulating support 100 is arranged in the accommodating cavity, and the insulating support 100 is used for fixing the battery 90 to be tested.

The detection device in this embodiment is specifically as follows:

as shown in fig. 1, the detection device comprises an upper cover plate, the box body 102 is of a cylindrical structure, the size of an inner cavity is 400mm in diameter D and 600mm in height, the detection device is made of a stainless steel plate with the thickness of 10mm, the inner wall of the cavity is provided with a high-temperature-resistant 1200 ℃ ceramic heat insulation coating, and the temperature difference of internal gas caused by the conduction of metal on the wall of the cavity in the thermal runaway process is reduced as much as possible; the two ends of the test container are respectively sealed and fixed by 10mm stainless steel plates and fixing bolts, and the cylindrical cavity is provided with a visual window observation window 104 which is provided with high-temperature-resistant explosion-proof toughened glass with the diameter phi of 150mm and is arranged on the inner wall of the accommodating cavity, so that the phenomena in the test process can be conveniently observed and the video recording can be conveniently carried out. And meanwhile, a safety relief valve 107 is arranged on the stainless steel upper cover plate, so that the sealed tank body sealing box 10 is prevented from exploding due to the fact that gas is released due to thermal runaway of the battery cell too fast. Be provided with the first binding post 105 of a plurality of power binding post on the upper cover plate, conveniently connect the electrode of the battery 90 that awaits measuring, battery voltage changes in the monitoring test process. In addition, the upper cover plate is also provided with a first ball valve 106 and a second ball valve 108 which are used for connecting a vacuum pump pumping part 705 and an inert compressed air source air supply part 704, so that the gas pressure in the box body is convenient to regulate and control, and the atmosphere type air or inert atmosphere is convenient to regulate and control.

As shown in fig. 1, a battery thermal runaway is triggered by a needling method, and the gas release and the gas pressure of the battery are monitored and measured by a device shown in fig. 2. The needling machine piercing depth 20 is connected through the circular flange circle on the cylindrical chamber wall that holds, and piercing depth 20 includes that cylindrical needling cylinder body holds cylinder body 202, servo motor driving motor 201, connecting shaft sleeve connecting rod cover 203, connecting rod 204 and force sensor 205, conveniently carries out accurate control to the acupuncture test parameter through electrical system, and in addition, cylindrical sealed tank body and needling machine cylinder body are fixed on delivery trailer 60, convenient test operation. The battery in a fully charged state is placed in an insulating support 100 and fixed, a connecting terminal on an upper cover plate assembly 101 is respectively connected with a positive terminal and a negative terminal of the battery, and the positive terminal and the negative terminal are respectively electrically connected with a port of a data acquisition unit. In addition, a first temperature sensor 804 is arranged at a height of 2mm above the battery pressure relief exhaust valve, meanwhile, a second temperature sensor 801 is arranged at the upper part of the inner wall of the sealed tank body, a third temperature sensor 802 is arranged at the middle part, a fourth temperature sensor 803 is arranged at the lower part, and the other terminal of the temperature sensor 80 is respectively connected with a port of a temperature data collector. And opening the first ball valve 106 of the upper cover plate, closing the second ball valve 108, closing the second pipeline valve 703, opening a vacuum pump to pump out air in the sealed tank body to keep negative pressure of-100 Pa in the sealed tank body, and then closing the first pipeline valve 702 connected with the pipeline valve of the vacuum pump. And opening the switch of the inert gas bottle, and filling inert atmosphere in the sealed tank body. A steel needle 110 with the diameter of 3mm is selected to vertically penetrate into a battery pole piece from the center of the wide surface of the battery at the speed of 0.1mm/s, the battery is reserved, and standing observation is carried out for 1 h. After the test is finished, the second ball valve 108 on the upper cover plate is opened, and the gas in the sealed tank body is collected by using the gas bag 109.

As shown in fig. 3, the thermal runaway of the battery is triggered by adopting a heating mode, and the gas release and the gas pressure of the battery are monitored and measured. And (3) connecting the acupuncture cylinder body with the sealed tank body by a circular flange ring on the wall of the cylindrical cavity for sealing and isolating, placing the battery in a fully charged state in the insulating support 100, and placing and fixing a heater with the heating power of 500W on one side of the wide surface of the battery core. The positive electrode terminal and the negative electrode terminal of the heater are respectively connected with a busbar on the sealed tank body, and the busbar is externally connected with a 220V alternating current stabilized voltage power supply. And connecting the wiring terminal on the upper cover plate with the positive electrode terminal and the negative electrode terminal of the battery respectively, and electrically connecting the positive electrode terminal and the negative electrode terminal with the port of the data acquisition unit respectively. In addition, a first temperature sensor 804 is arranged at a height of 2mm above the battery pressure relief exhaust valve, meanwhile, a second temperature sensor 801 is arranged at the upper part of the inner wall of the sealed tank body, a third temperature sensor 802 is arranged at the middle part, a fourth temperature sensor 803 is arranged at the lower part, and the other terminal of the temperature sensor 80 is respectively connected with a port of a temperature data collector. And opening the first ball valve 106 of the upper cover plate, closing the second ball valve 108, closing the valve 703 connected with the second pipeline, opening a vacuum pump to pump out air in the sealed tank body to keep negative pressure of-100 Pa in the sealed tank body, and then closing the valve connected with the pipeline of the vacuum pump. And opening the switch of the inert gas bottle, and filling inert atmosphere in the sealed tank body. When the test starts, the stabilized voltage power supply switch is turned on, the heater heats the battery core until the battery is opened by pressure relief or thermal runaway phenomenon occurs, the power supply switch is disconnected, and standing observation is carried out for 1 h. After the test is finished, the first ball valve 106 of the upper cover plate is opened, and the gas in the sealed tank body is collected by the gas bag 109.

As shown in fig. 4, the thermal runaway of the battery was triggered by the overcharge, and the gas release and pressure of the battery were monitored and measured. The cylindrical cavity wall is connected with the acupuncture cylinder body and the sealed tank body through the circular flange ring for sealing and isolation, the battery in a fully charged state is arranged in the insulating support 100, the positive electrode and the negative electrode of the battery are respectively connected with the bus copper bar on the sealed tank body, and the bus copper bar is externally connected with a constant-current charging cabinet. And the upper cover plate wiring terminal is respectively connected with the positive electrode terminal and the negative electrode terminal of the battery, and the positive electrode terminal and the negative electrode terminal are respectively electrically connected with the port of the data acquisition unit. In addition, a first temperature sensor 804 is arranged at a height of 2mm above the battery pressure relief exhaust valve, meanwhile, a second temperature sensor 801 is arranged at the upper part of the inner wall of the sealed tank body, a third temperature sensor 802 is arranged at the middle part, a fourth temperature sensor 803 is arranged at the lower part, and the other terminal of the temperature sensor 80 is respectively connected with a port of a temperature data collector. And opening the first ball valve 106 of the upper cover plate, closing the second ball valve 108, closing the valve 703 connected with the second pipeline, opening a vacuum pump to pump out air in the sealed tank body to keep negative pressure of-100 Pa in the sealed tank body, and then closing the valve connected with the pipeline of the vacuum pump. And opening the switch of the inert gas bottle, and filling inert atmosphere in the sealed tank body. When the test starts, the power supply of the charging cabinet is turned on, the battery is continuously charged for 1h by adopting 1C constant current, or the battery is opened by pressure relief or is disconnected by a power switch by thermal runaway phenomenon, and the battery is kept still for 1 h. After the test is finished, the first ball valve 106 of the upper cover plate is opened, and the gas in the sealed tank body is collected by the gas bag 109.

The operation steps of detecting the thermal runaway of the battery under the constant volume are as follows:

placing the test battery in a sealed constant box body 102, closing a second pipeline valve 703 of an inert gas source, opening a first pipeline valve 702 of the pipeline valve connected with a vacuum pump, opening the vacuum pump to vacuumize the box body 102, closing the pipeline valve connected with the vacuum pump, opening the second pipeline valve 703 of the inert gas source, opening a switch of a compressed inert gas source to fill inert gas in the sealed box, and when the pressure value in the box body 102 reaches 0.1MPaP0 (close to atmospheric pressure), closing the inert gas source communicating valve, after the environmental temperature T0 in the sealed tank body reaches a stable state, switching on a battery charging cabinet or a constant-pressure temperature current power supply or a needle machine switch, starting the data acquisition equipment to monitor and record the air pressure and temperature in the sealed tank body, and cutting off the power supply when the surface temperature of the test battery reaches 300 ℃ or thermal runaway occurs, standing for a period of time, and keeping the temperature of the environment Te and the air pressure Pe when the temperature in the closed tank body is stable.

The total molar quantity of the thermal runaway released gas can be theoretically estimated by adopting the following calculation formula:

n＝Pe×V0/(R×Te)-P0×V0/(R×T0)

wherein, R is a molar gas constant R-8.314J/mol K.

According to the recording observation of the camera, the time t of the thermal runaway gas release can be obtained, and the average rate vn/t of the thermal runaway gas production can be obtained according to the molar mass in the gas production.

And after the test is finished, opening a second ball valve 108, collecting the thermal runaway gas by using an air bag 109, and analyzing the gas components and the content of the thermal runaway gas.

According to the gas mass conservation equation, the mass of the gas flowing into the sealed pressure relief tank body is equal to the mass of the gas flowing out of the battery pressure relief valve, the friction effect between the lithium ion battery power supply shell pressure relief device and the gas and the heat exchange effect in the exhaust process are neglected, and the cross-sectional area calculation formula of the pressure relief valve is obtained as follows:

wherein R is a gas constant, v is a gas discharge rate, Mgas is a gas molar mass, which can be calculated according to the collected gas components and content, R is an adiabatic expansion polytropic index, usually 1.31,

the value is 0.55 as the flow factor. The maximum pressure resistance Pmax of the shell is assumed to be 1.5MPa, the maximum allowable temperature of the shell is Tmax, and the inner wall and the outer wall of the battery shell conduct heat uniformly. When the battery pressure relief explosion-proof valve has a round shapeThe above calculation formula further deduces the diameter as:

D＝4A/π^1/2

from the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

the test equipment of the present invention is used for testing a battery 90 to be tested, and comprises: the battery testing device comprises a sealing box 10, wherein the sealing box 10 is provided with a containing cavity for containing a battery 90 to be tested, and the battery 90 to be tested can be fixed in the sealing box 10; the puncturing device 20, the puncturing device 20 is connected with the sealed box 10, the puncturing device 20 comprises a puncturing part 110 for puncturing the battery 90 to be tested, and at least part of the puncturing part 110 is movably arranged in the accommodating cavity; data acquisition device 502, data acquisition device 502 can gather the gaseous information in the seal box 10, and data acquisition device 502 is connected with the battery 90 that awaits measuring is electric to gather the voltage information of the battery 90 that awaits measuring that holds in the cavity. With the above arrangement, when a thermal runaway test of the battery is performed, the battery 90 to be tested is fixed in the accommodating cavity of the sealed box 10, and the battery is punctured by driving the puncturing part 110 of the puncturing device 20, so that the battery is in a thermal runaway state, and gas released by the battery 90 to be tested from the pressure release valve is stored in the sealed box 10. In this way, the voltage of the battery 90 to be tested and the state information of the released gas are collected by the detection data collection device 502, so that the size of the pressure relief valve of the battery 90 to be tested is selected by analyzing the data. The problem of the relief valve type selection difficulty of battery among the prior art is solved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A test apparatus for testing a battery (90) under test, the test apparatus comprising:

the sealing box (10) is provided with a containing cavity for containing the battery (90) to be tested, and the battery (90) to be tested can be fixed in the sealing box (10);

a puncturing device (20), wherein the puncturing device (20) is fixedly connected with the sealing box (10), the puncturing device (20) comprises a puncturing part (110) for puncturing the battery (90) to be tested, and at least part of the puncturing part (110) is movably arranged in the accommodating cavity;

data acquisition device (502), data acquisition device (502) can be right gas information in seal box (10) gathers, just data acquisition device (502) with await measuring battery (90) electricity is connected, with right hold in the cavity the voltage information of awaiting measuring battery (90) gathers.

2. The test apparatus according to claim 1, further comprising a carrier gas device (70), the carrier gas device (70) comprising:

the air exhausting part (705), the air exhausting part (705) is connected with the sealing box (10) to exhaust the air in the accommodating cavity;

a gas supply component (704), the gas supply component (704) with the seal box (10) is connected to supply gas to in the accommodation cavity.

3. The test apparatus according to claim 2, wherein the carrier gas device (70) comprises:

the air supply device comprises a first pipeline (701), one end of the first pipeline (701) is communicated with the accommodating cavity, the other end of the first pipeline (701) is connected with a first branch pipeline (7011) and a second branch pipeline (7012), the first branch pipeline (7011) is connected with the air exhaust part (705), and the second branch pipeline (7012) is connected with the air supply part (704);

a first pipe valve (702), the first pipe valve (702) disposed on the first branch line (7011);

a second pipeline valve (703), the second pipeline valve (703) disposed on the second branch line (7012).

4. The test apparatus according to claim 1, wherein the sealed box (10) comprises a cover plate assembly (101) and a box body (102), the cover plate assembly (101) being provided over the box body (102) to form the receiving cavity, the cover plate assembly (101) comprising:

the cover plate (1011) is arranged on the box body (102) in a covering mode;

the pressure relief valve (107) is arranged on the cover plate (1011), and the pressure relief valve (107) is used for releasing gas in the accommodating cavity;

the first connecting terminal (105) is arranged on the cover plate (1011), and the data acquisition device (502) is connected with the electrode of the battery (90) to be detected through the first connecting terminal (105) so as to acquire voltage information of the battery (90) to be detected;

the first ball valve (106) is arranged on the cover plate (1011), and the first ball valve (106) is communicated with the accommodating cavity so as to supply gas into the accommodating cavity or discharge the gas in the accommodating cavity through the first ball valve (106);

and the second ball valve (108) is arranged on the cover plate (1011), and an air bag (109) used for collecting gas in the accommodating cavity is connected to the second ball valve (108).

5. The test apparatus according to claim 4, wherein the seal box (10) comprises:

a viewing window (104), the viewing window (104) disposed on a sidewall of the case (102);

the electric appliance window (1030), the electric appliance window (1030) is arranged on the side wall of the box body (102), the electric appliance window (1030) and the observation window (104) are oppositely arranged, a second wiring terminal (103) is arranged on the electric appliance window (1030), and the second wiring terminal (103) is used for being connected with an electrode of the battery (90) to be tested so as to supply power to the battery (90) to be tested.

6. The test apparatus according to claim 5, wherein the viewing window (104) comprises a circular through hole provided on a side wall of the case (102).

7. The testing apparatus according to claim 4, wherein the housing (102) has an interior cavity (1021) therein, the interior cavity (1021) being of cylindrical configuration.

8. Test device according to claim 4, characterized in that the cover plate (1011) and the inner wall of the tank (102) are provided with a ceramic thermal barrier coating.

9. Testing device according to claim 1, characterized in that said piercing means (20) comprise:

the containing cylinder body (202), the containing cylinder body (202) is fixedly connected with the seal box (10);

the driving motor (201), the driving motor (201) is arranged in the accommodating cylinder body (202), and an output shaft of the driving motor (201) is connected with a connecting rod (204);

the connecting rod sleeve (203), the connecting rod sleeve (203) is connected with the driving motor (201), the connecting rod (204) is connected with the connecting rod sleeve (203) in a relatively movable mode so as to drive the connecting rod (204) to move relative to the connecting rod sleeve (203) through rotation of an output shaft of the driving motor (201), and the puncture part (110) is arranged at one end, far away from the driving motor (201), of the connecting rod (204);

the force sensor (205) is arranged at one end, away from the driving motor (201), of the connecting rod (204), and the puncture part (110) is arranged at one side, away from the connecting rod (204), of the force sensor (205).

10. The test apparatus according to claim 1, wherein the data acquisition device (502) comprises:

the temperature sensor (80) is arranged in the accommodating cavity to collect temperature information in the accommodating cavity; and/or the presence of a gas in the gas,

atmospheric pressure sensor (501), atmospheric pressure sensor (501) set up on seal box (10), in order to right hold the atmospheric pressure information in the cavity and gather.