CN213100538U

CN213100538U - High-low temperature box safety control system for lithium battery test

Info

Publication number: CN213100538U
Application number: CN202021486117.2U
Authority: CN
Inventors: 崔雪红; 张明春; 王馨宇
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-05-04
Anticipated expiration: 2030-07-24

Abstract

The utility model provides a high-low temperature cabinet safety control system for lithium cell test, including fire extinguishing systems controller, display screen, UPS uninterrupted power source, smoke transducer, temperature sensor, weighing sensor, fire extinguisher solenoid valve, audible-visual annunciator and carbon dioxide fire extinguisher, the fire extinguishing systems controller contains the input port of three analog quantity and the output port of two switching values, and the input port of three analog quantity is signal connection temperature sensor, smoke transducer and weighing sensor respectively, and the output port of two switching values is signal connection fire extinguisher solenoid valve and audible-visual annunciator respectively, the carbon dioxide fire extinguisher is connected to the fire extinguisher solenoid valve. The utility model discloses a this device can realize being used for the high low temperature of lithium cell test because under the power failure condition that power line overhauls or the trouble caused, can play effectual safety protection, in time the investigation hidden danger problem point reduces the risk that the lithium cell catches fire, explodes and shines.

Description

High-low temperature box safety control system for lithium battery test

Technical Field

The utility model belongs to the technical field of the battery safety test, especially, relate to a high low temperature cabinet safety control system for lithium cell test.

Background

The lithium cell has some side reactions and can produce heat mostly except normal charge-discharge chemical reaction, and when heat production rate was higher than the radiating rate, the battery temperature rose, produced more heat and gaseous product, and the battery got into uncontrollable self-heating state this moment, and the battery takes place to burn, explodes even. This phenomenon is called thermal runaway, and the occurrence of combustion and explosion in lithium batteries is caused by the thermal runaway.

The occurrence of combustion and explosion in lithium batteries is related to many factors, such as the state of charge of the battery, the rate and extent of occurrence of side reactions, the rate of heat transfer, the sensitivity of opening the safety valve, the ambient temperature of the outside, and the like. Therefore, not all of the batteries that enter the thermal runaway state explode, with a certain probability. However, after thermal runaway occurs, a large amount of gas is released and smoke is generated in the early stage along with continuous self-heating of the battery, and a series of problems such as ignition and the like occur.

The causes of thermal runaway of the lithium battery can be summarized as external short circuit, internal short circuit, overcharge and overdischarge, and the like, and the external short circuit and the overcharge and overdischarge belong to the field of battery safety test, and are not discussed herein too much. The internal short circuit is mainly discussed, and the internal short circuit is mainly caused by the fact that burrs of copper foil and aluminum foil inside a battery cell break through a diaphragm or dendritic crystals of lithium atoms break through the diaphragm. The burrs of the copper-aluminum foil are formed during the production process, and the fine needle-shaped metals can cause internal micro short circuit of the lithium battery.

The structure of the existing high-low temperature box mainly comprises: the box body structure, the box door structure, the refrigerating system, the electric control system, the circulating system, the heating system, the fire fighting system and the like. However, the existing high-low temperature chamber manufacturers pay more attention to the aspects of meeting the reproducibility of the environmental conditions of the test chamber, the repeatability of the environmental conditions, the measurable and controllable performance of the parameters of the environmental conditions, the exclusivity of the environmental conditions, the safety and the reliability of the test equipment and the like. But the design consideration to the fire extinguishing system is not comprehensive enough, for example, the equipment that causes because of power line maintenance or trouble is shut down in the battery test region, and if the lithium cell did not in time demolish from the box this moment, then the lithium cell will be in a state that does not have fire control and pressure release protection, if this moment takes place the thermal runaway problem, then will cause more serious risk. The purpose of this proposal is to consider the uncertainty of the thermal runaway of the lithium battery, and carry out the risk point identification in the links that are easy to be omitted or not concerned about, thereby monitoring the hidden danger points in time and avoiding the occurrence of greater risks.

Disclosure of Invention

In view of this, the utility model aims at providing a high-low-temperature box safety control system for lithium cell test to realize that monitoring, warning, fire extinguishing system can effective control when the lithium cell is not in time taken out under high-low-temperature box is in states such as power failure, trouble.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a high-low temperature box safety control system for lithium battery testing comprises a fire extinguishing system controller, a display screen, a UPS (uninterrupted power supply), a smoke sensor, a temperature sensor, a weighing sensor, a fire extinguisher solenoid valve, an audible and visual alarm and a carbon dioxide fire extinguisher, wherein the fire extinguishing system controller comprises three analog input ports and two switching output ports, the three analog input ports are respectively in signal connection with the temperature sensor, the smoke sensor and the weighing sensor, the two switching output ports are respectively in signal connection with the fire extinguisher solenoid valve and the audible and visual alarm, and the fire extinguisher solenoid valve is connected with the carbon dioxide fire extinguisher; the fire extinguishing system controller is also in signal connection with the display screen and the UPS.

Furthermore, the UPS comprises a battery storage system and a power conversion module, 220V alternating current is connected to supply power for the battery storage system, and the 220V alternating current is converted into 24V direct current to supply power through the power conversion module.

Further, box upper portion sets up air exhaust motor, cooling fan, hot plate and smoke transducer, and inside the box was inserted to the one end of exhaust tube, the other end connected air exhaust motor, and the pipeline connection smoke transducer is passed through in the export of air exhaust motor, cooling fan and hot plate pass through bearing structure and fix around the pipeline between air exhaust motor and smoke transducer.

Further, the weighing sensor is arranged below a carbon dioxide cylinder of the carbon dioxide fire extinguisher.

Compared with the prior art, the utility model discloses following advantage has:

the utility model discloses a this device can realize being used for the high low temperature of lithium cell test because under the power failure condition that power line overhauls or the trouble caused, can play effectual safety protection, in time the investigation hidden danger problem point reduces the risk that the lithium cell catches fire, explodes.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic diagram of a high and low temperature box safety control system according to an embodiment of the present invention;

fig. 2 is a schematic view of an installation structure of a smoke sensor according to an embodiment of the present invention.

Description of reference numerals:

1-fire extinguishing system controller, 2-display screen, 3-UPS uninterrupted power supply, 4-smoke sensor, 5-temperature sensor, 6-weighing sensor, 7-fire extinguisher solenoid valve, 8-acousto-optic alarm, 9-carbon dioxide fire extinguisher, 10-exhaust pipe, 11-exhaust motor, 12-cooling fan and 13-heating plate.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

A high and low temperature box safety control system for lithium battery test is shown in FIG. 1, and comprises: a fire extinguishing system controller 1, a display screen 2, a UPS 3, a smoke sensor 4, a temperature sensor 5, a weighing sensor 6, a fire extinguisher electromagnetic valve 7, an audible and visual alarm 8 and a carbon dioxide fire extinguisher 9,

the fire extinguishing system controller 1 comprises three analog input ports and two switching output ports, the three analog input ports are respectively in signal connection with a temperature sensor 5, a smoke sensor 4 and a weighing sensor 6, the two switching output ports are respectively in signal connection with a fire extinguisher solenoid valve 7 and an audible and visual alarm 8, and the fire extinguisher solenoid valve 7 is connected with a carbon dioxide fire extinguisher 9;

the fire extinguishing system controller 1 is also in signal connection with a display screen 2 and a UPS (uninterrupted power supply) 3.

The 220V alternating current supplies power to the UPS 3, the UPS 3 contains a battery storage system and can provide 500w of output power, and the 220V alternating current charges a battery in the UPS 3 under the condition of no power failure so as to ensure that the UPS 3 can provide minimum 10-hour wired power supply in the power failure state; in addition, the UPS 3 comprises a power supply conversion module, and can convert 220V alternating current into 24V direct current which meets the requirements of the fire extinguishing system controller 1, the display screen 2, the temperature sensor 5, the smoke sensor 4, the weighing sensor 6, the fire extinguisher electromagnetic valve 7 and the audible and visual alarm 8 for power supply;

the fire extinguishing system controller 1 comprises three analog input ports which respectively meet the signal input of a temperature sensor 5, the signal input of a smoke sensor 4 and the signal input of a weighing sensor 6; the output ports of the two switching values respectively meet the on-off control of the fire extinguisher solenoid valve 7 and the on-off control of the audible and visual alarm 8; a display screen communication interface for monitoring data display and recording;

the temperature sensor 5 is arranged in the box body and used for detecting the temperature change in the box body in real time;

the smoke sensor 4 can not operate in a high-temperature or low-temperature environment for a long time, so that the smoke concentration condition in the box body is directly monitored in a mode of extracting gas in the box body and carrying out temperature rise and drop treatment; during specific implementation, as shown in fig. 2, the upper portion of the box body is provided with an air exhaust motor 11, a cooling fan 12, a heating plate 13 and a smoke sensor 4, one end of an air exhaust pipe 10 is inserted into the box body, the other end of the air exhaust pipe is connected with the air exhaust motor 11, an outlet of the air exhaust motor 11 is connected with the smoke sensor 4 through a pipeline, and the cooling fan 12 and the heating plate 13 are fixed around the pipeline between the air exhaust motor 11 and the smoke sensor 4 through a supporting structure.

When one of the two sensors exceeds the standard, the audible and visual alarm 8 is lightened and gives an alarm sound to inform an operator on duty to check and treat hidden trouble problems in time, and at the moment, the electromagnetic valve of the carbon dioxide fire extinguisher 9 does not act (fire-fighting gas cannot be sprayed out). When the two sensors simultaneously exceed the standard, the electromagnetic valve 7 of the fire extinguisher is automatically opened, carbon dioxide gas is sprayed out at the moment, the interior of the high-low temperature box body is filled with the carbon dioxide gas instantly, and the audible and visual alarm 8 gives out alarm sound and lights up the warning lamp to inform the person on duty to take fire extinguishing measures immediately.

Priority setting may be made according to temperature or smoke rate, grade, etc. by algorithmic calculations employed by the fire suppression control system controller 1. Consider the smoke sensor 4; the temperature sensor 5 causes the automatic start of the electromagnetic valve 7 of the fire extinguisher due to high sensitivity or misoperation, and a certain unit of the fire extinguishing system breaks down, so that a manual fire extinguishing structure is arranged, manual fire extinguishing is selected according to actual conditions, and the carbon dioxide fire extinguisher 9 is closed.

In addition, consider the carbon dioxide fire extinguisher 9 because the gas cylinder quality and the sealed condition that leaks and lead to the carbon dioxide gas inadequately, this system has increased the weighing sensor 6 that is used for detecting the carbon dioxide capacity of carbon dioxide fire extinguisher 9, this weighing sensor 6 installs in carbon dioxide gas cylinder below, be used for weighing the weight of gas cylinder in real time, through making the comparison with the weight of leaving the factory, reach the actual capacity of carbon dioxide gas, thereby the capacity of carbon dioxide satisfies the requirement of putting out a fire when guaranteeing that the trouble takes place, and this numerical value shows through display screen 2, in order to make things convenient for daily tester's safe point to examine.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a high low temperature cabinet safety control system for lithium cell test which characterized in that: comprises a fire extinguishing system controller (1), a display screen (2), a UPS (uninterrupted power supply) (3), a smoke sensor (4), a temperature sensor (5), a weighing sensor (6), a fire extinguisher solenoid valve (7), an audible and visual alarm (8) and a carbon dioxide fire extinguisher (9),

the fire extinguishing system controller (1) comprises three analog input ports and two switching output ports, the three analog input ports are respectively in signal connection with a temperature sensor (5), a smoke sensor (4) and a weighing sensor (6), the two switching output ports are respectively in signal connection with a fire extinguisher solenoid valve (7) and an acousto-optic alarm (8), and the fire extinguisher solenoid valve (7) is connected with a carbon dioxide fire extinguisher (9);

the fire extinguishing system controller (1) is also in signal connection with the display screen (2) and the UPS (uninterrupted power supply).

2. The safety control system of the high and low temperature box for the lithium battery test as claimed in claim 1, wherein: the UPS (3) comprises a battery storage system and a power conversion module, 220V alternating current is connected to supply power for the battery storage system, and the 220V alternating current is converted into 24V direct current to supply power through the power conversion module.

3. The safety control system of the high and low temperature box for the lithium battery test as claimed in claim 1, wherein: high hypothermia box's box upper portion sets up air exhaust motor (11), cooling fan (12), hot plate (13) and smoke transducer (4), and inside the box was inserted to the one end of exhaust tube (10), air exhaust motor (11) was connected to the other end, and pipe connection smoke transducer (4) were passed through in the export of air exhaust motor (11), cooling fan (12) and hot plate (13) are fixed around the pipeline between air exhaust motor (11) and smoke transducer (4) through bearing structure.

4. The safety control system of the high and low temperature box for the lithium battery test as claimed in claim 1, wherein: the weighing sensor (6) is arranged below a carbon dioxide gas cylinder of the carbon dioxide fire extinguisher (9).