Safety test box device for lithium ion battery

Abstract

The utility model belongs to the technical field of lithium ion battery safety test, and discloses a safety test box device for a lithium ion battery, which comprises a test box with the front sealed by a box door, and a first partition plate and a second partition plate are mounted in the test box. The internal space of the test box is sequentially divided into a waste gas treatment cavity, a test cavity and a waste storage cavity from top to bottom by the first partition plate and the second partition plate, and a waste gas purification treatment device is mounted in the waste gas treatment cavity; a test table top bin door is arranged in the middle of the second partition plate, and a driving mechanism for controlling the test table top bin door to be opened is arranged in the waste storage cavity; a dust removal device is installed outside one side of the test box, and a dust suction port of the dust removal device is located in the test cavity at the upper end of the second partition plate. According to the utility model, toxic and harmful waste gas generated by combustion is purified and discharged, so that the collection and recycling of a failed battery assembly are facilitated, and the cleaning and collection of fine electrode material dust generated during explosion combustion of a failed battery are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium ion battery safety testing, and in particular relates to a safety testing chamber device for lithium ion batteries. Background Art

[0002] As one of the core units of the battery system, the safety of lithium-ion battery cells often determines the reliability of the battery system, and thus has become the focus of attention of battery manufacturers and even consumers. In daily use, lithium-ion batteries may be abused by overcharging and overdischarging, which may lead to the risk of thermal runaway of lithium-ion batteries and finally cause the failure of battery system protection. In order to ensure the safety performance of lithium-ion batteries, lithium-ion batteries need to be overcharged, overdischarged, and short-circuited during the research and development and production process. The main standards are "GB / T31485-2015 6.2.2 Overdischarge Test", "GB / T31485-2015 6.2.3 Overcharge Test", and "GB / T31485-2015 6.2.4 Short Circuit Test". This requires a test chamber device that can be used to meet the test analysis of lithium-ion battery overcharging and overdischarging and batteries with safety risks.

[0003] In the existing test chamber for testing overcharge and overdischarge of lithium-ion batteries, the battery cells and the charge and discharge test system are connected in the test chamber, and the test platform is built to start the experiment. The disadvantages are as follows:

[0004] 1. When the battery is overcharged and over-discharged, the test sample will experience thermal runaway, and the battery will catch fire, explode, burn, and fail. The electrode material particles and dust generated by the battery explosion and the combustion will produce a large amount of toxic and harmful gases. The existing overcharge and over-discharge test chambers have no exhaust gas purification and treatment equipment. The toxic and harmful gases generated by the thermal runaway of the battery will diffuse throughout the test chamber and the test area;

[0005] 2. The test chamber has no storage device for failed samples. After the test is completed, it takes a lot of manpower to collect and recycle the failed samples;

[0006] 3. The electrode material dust generated by battery thermal runaway is scattered into the test chamber and scattered into the test area when the test personnel clean the electrode material dust. It is difficult and time-consuming to clean up on site within 5 seconds. The test personnel are at risk of occupational diseases if they inhale the electrode material dust for a long time. Utility Model Content

[0007] The utility model aims to provide a safety test box device for lithium ion batteries, so as to solve the above problems existing in the prior art.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A safety test chamber device for lithium-ion batteries comprises a test chamber sealed by a chamber door at the front, a first partition plate and a second partition plate are installed in the test chamber from top to bottom, the first partition plate and the second partition plate divide the internal space of the test chamber into an exhaust gas treatment chamber, a test chamber and a waste storage chamber from top to bottom in sequence, an exhaust gas purification device is installed in the exhaust gas treatment chamber, which is used to purify the exhaust gas generated in the test chamber through the exhaust gas purification device and discharge the purified gas to the outside of the test chamber; a test table door for placing lithium-ion batteries for testing is provided in the middle of the second partition plate, and a driving mechanism for controlling the test table door to open downward is provided in the waste storage chamber; a dust removal device is installed on the outside of one side of the test chamber, and the dust suction port of the dust removal device is located in the test chamber at the upper end of the second partition plate.

[0010] As a preferred technical solution in the utility model, a smoking duct connected to the test chamber is arranged at the inlet of the exhaust gas purification treatment device, and a smoke exhaust duct connected to the outside of the test box is arranged at the outlet of the exhaust gas purification treatment device.

[0011] As a preferred technical solution in the present invention, a smoke exhaust fan is provided at the outlet of the exhaust gas purification device to discharge the remaining purified waste gas into a smoke exhaust duct.

[0012] As a preferred technical solution in the utility model, a smoke sensor is installed on the inner top surface of the test chamber.

[0013] As a preferred technical solution in the utility model, two test table top doors are provided, and one end of the two test table top doors is abutted against each other, and the other ends of the two test table top doors are respectively rotatably connected to the second partition plate; the driving mechanism is a hydraulic cylinder, and two hydraulic cylinders are provided. The cylinder bodies of the two hydraulic cylinders are respectively rotatably connected to the inner walls on both sides of the waste storage chamber, and the piston rods of the two hydraulic cylinders are respectively rotatably connected to the lower ends of the two test table top doors.

[0014] As a preferred technical solution in the utility model, universal wheels are installed at the lower end of the test box.

[0015] As a preferred technical solution in the utility model, a metal screen is provided at the lower part of the waste storage chamber, and the metal screen is located below the driving mechanism.

[0016] As a preferred technical solution in the present utility model, the door includes a test chamber door corresponding to the test chamber and a waste storage chamber door corresponding to the waste storage chamber.

[0017] As a preferred technical solution in the present invention, a control system is installed on the test chamber door, and the control system is electrically connected to the exhaust gas purification device, the driving mechanism and the dust removal device.

[0018] As a preferred technical solution in the utility model, a three-color alarm indicator light is arranged outside the test box, and the three-color alarm indicator light is electrically connected to the control system.

[0019] Beneficial effects: The utility model conducts safety performance tests on lithium-ion batteries in a test chamber, and utilizes the waste gas purification device in the waste gas treatment chamber. When thermal runaway occurs in the safety performance test of the lithium-ion battery, toxic and harmful waste gases generated by combustion can be purified and discharged in time, which complies with the requirements of the ISO14001 environmental management system for waste gas treatment, establishes measures for green and environmentally friendly factories, and can protect the ecological environment.

[0020] After the driving mechanism of the utility model drives the test table door to open, the test failed battery can fall from the closed opening of the test table into the waste storage chamber, which is beneficial to the collection and recycling of failed battery components (aluminum-plastic film, metal foil, metal tabs).

[0021] In the utility model, a dust removal device is installed on one side of the test chamber, which is conducive to the cleaning and collection of fine electrode material dust generated by the explosion and combustion of failed batteries, avoiding inhalation of dust by people during manual dust cleaning, which is conducive to the prevention and treatment of occupational diseases. The automated dust removal device can also reduce the cleaning time by 5s and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0023] Figure 2 It is a cross-sectional view of the utility model.

[0024] In the figure: 1-test box; 101-test table door; 102-metal filter; 103-test chamber door; 104-waste storage chamber door; 105-universal wheel; 2-exhaust gas purification device; 3-driving mechanism; 4-dust removal device; 401-dust suction port; 5-smoke sensor; 6-control system; 7-three-color alarm indicator light. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the utility model will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation of the utility model.

[0026] Example:

[0027] like Figure 1 and Figure 2 As shown, the present embodiment provides a safety test chamber device for lithium-ion batteries, including a test chamber 1 sealed by a chamber door on the front, a first partition plate and a second partition plate are installed from top to bottom in the test chamber 1, the first partition plate and the second partition plate divide the internal space of the test chamber 1 into an exhaust gas treatment chamber, a test chamber and a waste storage chamber from top to bottom in sequence, an exhaust gas purification treatment device 2 is installed in the exhaust gas treatment chamber, for purifying the exhaust gas generated in the test chamber through the exhaust gas purification treatment device 2 and discharging the purified gas to the outside of the test chamber 1, when thermal runaway occurs in the lithium-ion battery during the safety performance test, the toxic and harmful exhaust gas generated by combustion can be purified and discharged in time, which meets the requirements of the ISO14001 environmental management system for exhaust gas treatment, establishes measures for green and environmentally friendly factories, and protects the ecological environment.

[0028] A test table door 101 for placing lithium-ion batteries for testing is provided in the middle of the second partition plate, and a driving mechanism 3 for controlling the test table door 101 to open downward is provided in the waste storage chamber. After the driving mechanism 3 drives the test table door 101 to open, the failed battery can fall from the closed opening of the test table to the waste storage chamber, which is beneficial to the collection and recycling of failed battery components (aluminum-plastic film, metal foil, metal pole ear).

[0029] A dust removal device 4 is installed on the outside of one side of the test box 1. The dust suction port 401 of the dust removal device 4 is located in the test chamber at the upper end of the second partition plate, which is conducive to the cleaning and collection of fine electrode material dust generated by the failed battery during explosion and combustion, avoiding the inhalation of dust by people during manual dust cleaning, which is conducive to the prevention and treatment of occupational diseases. The automated dust removal device can also reduce the sorting time by 5s and improve work efficiency.

[0030] As a preferred implementation scheme in this embodiment, it needs to be further explained that a smoking duct 201 connected to the test chamber is provided at the inlet of the exhaust gas purification treatment device 2, the inlet of the smoking duct 201 passes through the first partition plate and is connected to the test chamber, and a smoke exhaust duct 202 connected to the outside of the test box 1 is provided at the outlet of the exhaust gas purification treatment device 2 to ensure the circulation of smoke.

[0031] As a preferred implementation scheme in this embodiment, it needs to be further explained that a smoke exhaust fan is provided at the outlet of the exhaust gas purification device 2 to discharge the other purified gases into the smoke exhaust duct 202, which can accelerate the circulation of the smoke and ensure the normal operation of the equipment.

[0032] As a preferred implementation scheme in this embodiment, it needs to be further explained that a smoke sensor 5 is installed on the inner top surface of the test chamber. During the test, if the smoke sensor 5 senses the generation of smoke in the test chamber, the exhaust gas purification device 2 is started, thereby ensuring the purification effect of the smoke and avoiding the waste of resources caused by turning on the exhaust gas purification device 2 when it is not needed.

[0033] As a preferred implementation scheme in this embodiment, it needs to be further explained that, the test table top doors 101 are provided with two, and the two test table top doors 101 are abutted at one end close to each other, and the other ends of the two test table top doors 101 are respectively rotatably connected to the second partition plate; the driving mechanism 3 is a hydraulic cylinder, and two hydraulic cylinders are provided. The cylinder bodies of the two hydraulic cylinders are respectively rotatably connected to the inner walls on both sides of the waste storage chamber, and the piston rods of the two hydraulic cylinders are respectively rotatably connected to the lower ends of the two test table top doors 101, so that the opening and closing of the two test table top doors 101 can be controlled by the hydraulic cylinder, which is simple and effective.

[0034] As a preferred implementation scheme in this embodiment, it needs to be further explained that a universal wheel 105 is installed at the lower end of the test box 1, and the equipment can be moved by hand to improve convenience.

[0035] As a preferred implementation scheme in this embodiment, it needs to be further explained that a metal leakage screen 102 is provided at the lower part of the waste storage chamber, and the metal leakage screen 102 is located below the driving mechanism 3. After the battery thermal runaway combustion occurs, the hatch switch is opened, and the failed battery falls from the test table to the waste storage frame, thereby realizing the separation of battery component materials and electrode dust.

[0036] As a preferred implementation scheme in this embodiment, it needs to be further explained that the door includes a test chamber door 103 corresponding to the test chamber and a waste storage chamber door 104 corresponding to the waste storage chamber, so that the test chamber and the waste storage chamber can be controlled separately.

[0037] As a preferred implementation scheme in this embodiment, it needs to be further explained that a control system 6 is installed on the test chamber door 103, and the control system 6 is electrically connected to the exhaust gas purification device 2, the driving mechanism 3 and the dust removal device 4 to facilitate automatic control.

[0038] As a preferred implementation scheme in this embodiment, it needs to be further explained that a three-color alarm indicator light 7 is arranged outside the test box 1, and the three-color alarm indicator light 7 is electrically connected to the control system 6. In practice, when the test fails, the smoke sensor works and transmits the signal to the three-color alarm indicator light to display a red alarm. The equipment alarm signal is linked to the exhaust gas purification treatment device, and the exhaust gas purification treatment device recognizes the signal and turns on the switch, delaying the flue gas treatment.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A safety test chamber device for lithium-ion batteries, characterized in that: The invention comprises a test box (1) sealed at the front by a box door, wherein a first partition plate and a second partition plate are installed in the test box (1) from top to bottom, and the first partition plate and the second partition plate divide the internal space of the test box (1) into an exhaust gas treatment chamber, a test chamber and a waste material storage chamber from top to bottom in sequence, and an exhaust gas purification device (2) is installed in the exhaust gas treatment chamber, and is used to purify the exhaust gas generated in the test chamber through the exhaust gas purification device (2) and discharge the purified gas to the outside of the test box (1); a test table door (101) for placing a lithium ion battery for testing is arranged in the middle of the second partition plate, and a driving mechanism (3) for controlling the test table door (101) to open downward is arranged in the waste material storage chamber; a dust removal device (4) is installed on the outside of one side of the test box (1), and a dust suction port (401) of the dust removal device (4) is located in the test chamber at the upper end of the second partition plate.

2. A safety test chamber device for lithium-ion batteries according to claim 1, characterized in that: A smoke pipe (201) connected to the test chamber is arranged at the inlet of the waste gas purification treatment device (2), and a smoke exhaust pipe (202) connected to the outside of the test box (1) is arranged at the outlet of the waste gas purification treatment device (2).

3. A safety test chamber device for lithium-ion batteries according to claim 2, characterized in that: A smoke exhaust fan is provided at the outlet of the waste gas purification device (2) for discharging the remaining waste gas after purification into a smoke exhaust duct (202).

4. A safety test chamber device for lithium-ion batteries according to claim 1, characterized in that: A smoke sensor (5) is installed on the inner top surface of the test chamber.

5. A safety test chamber device for lithium-ion batteries according to claim 1, characterized in that: The test bench door (101) is provided with two, one end of the two test bench door (101) close to each other is abutted, and the other ends of the two test bench door (101) are respectively rotatably connected to the second partition plate; the driving mechanism (3) is a hydraulic cylinder, and the hydraulic cylinder is provided with two, the cylinder bodies of the two hydraulic cylinders are respectively rotatably connected to the inner walls of the two sides of the waste storage chamber, and the piston rods of the two hydraulic cylinders are respectively rotatably connected to the lower ends of the two test bench door (101).

6. A safety test chamber device for lithium-ion batteries according to claim 1 or 5, characterized in that: A metal screen (102) is provided at the lower part of the waste storage chamber, and the metal screen (102) is located below the driving mechanism (3).

7. A safety test chamber device for lithium-ion batteries according to claim 1, characterized in that: A universal wheel (105) is installed at the lower end of the test box (1).

8. A safety test chamber device for lithium-ion batteries according to claim 1, characterized in that: The door comprises a test chamber door (103) corresponding to the test chamber and a waste storage chamber door (104) corresponding to the waste storage chamber.

9. A safety test chamber device for lithium-ion batteries according to claim 8, characterized in that: A control system (6) is installed on the test chamber door (103), and the control system (6) is electrically connected to the exhaust gas purification device (2), the driving mechanism (3) and the dust removal device (4).

10. A safety test chamber device for lithium-ion batteries according to claim 9, characterized in that: A three-color alarm indicator light (7) is arranged outside the test box (1), and the three-color alarm indicator light (7) is electrically connected to the control system (6).

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