CN211238342U - Nitrogen charging safety protection system for lithium battery in full life cycle - Google Patents
Nitrogen charging safety protection system for lithium battery in full life cycle Download PDFInfo
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- CN211238342U CN211238342U CN202020078012.7U CN202020078012U CN211238342U CN 211238342 U CN211238342 U CN 211238342U CN 202020078012 U CN202020078012 U CN 202020078012U CN 211238342 U CN211238342 U CN 211238342U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a lithium cell full life cycle's nitrogen gas safety protection system that fills, including container and external safety device, be equipped with a plurality of battery rack in the container, the first tube coupling on the external safety device is on first air inlet, the second tube coupling on the external safety device is on the second air inlet, nitrogen gas thermoregulation unit has connected gradually on the first pipeline, gas circulation unit and the unit that fills nitrogen, the end-to-end connection of second pipeline is on gas circulation unit, the container is being close to first air inlet inboard and is being equipped with nitrogen gas output monitoring unit. The nitrogen temperature adjusting unit, the gas circulating unit, the nitrogen charging unit and the nitrogen output monitoring unit are all connected with the central control system, the safety of the electric equipment and the system is protected, the container is in a low-oxygen constant-temperature environment for a long time, the normal work of the battery is facilitated, the service life of the battery can be prolonged, and the safety of the whole container is improved.
Description
Technical Field
The utility model relates to a lithium cell safety protection technical field particularly, relates to a lithium cell full life cycle's nitrogen gas safety protection system that fills.
Background
When the lithium ion battery initially enters the industrialization in the 90 th of the 20 th century, the lithium ion battery is mainly applied to various portable electronic products. Lithium ion batteries have rapidly received market acceptance because of their high energy, stable cycling performance, environmental friendliness, and no memory effect. With the continuous improvement of the production technology and the continuous reduction of the cost of the lithium ion battery, the application field is also continuously expanded, and the lithium ion battery is used for electronic products, traffic power supplies, storage devices and the like, so that the life and the travel of people are greatly facilitated.
But lithium ion battery benefits mankind, has the potential danger simultaneously, and lithium cell burning explosion's incident is generally not all electric cores take place thermal runaway simultaneously and causes, but some electric core thermal runaway wherein, and the heat is rapidly transferred and is induced whole system to explode. At present, an early warning fire-fighting system of an energy storage power station is mainly characterized in that a plurality of temperature-sensing detectors and smoke-sensing detectors are arranged at the top of an energy storage cabinet/battery cabinet to monitor the running condition of the energy storage system, and gas fire extinguishing devices such as heptafluoropropane and aerosol are installed to extinguish fire when a fire disaster occurs.
In the prior art, the whole energy storage cabinet/battery cabinet is monitored, and when the single battery is out of control due to thermal runaway, abnormal signals can not be detected or the abnormal signals are not fed back timely, so that the thermal runaway chain diffusion of the battery is easy to cause a larger fire. When a fire is detected, the fire extinguishing device is restarted to spray fire extinguishing agent in the whole energy storage station, so that the fire source cannot be quickly and effectively extinguished. Moreover, batteries are easy to re-ignite after being ignited, and the fire extinguishing agents matched with common containers/energy storage cabinets are stored in liquid state, so that the storage amount is limited. If the battery is reignited, the fire extinguishing agent is not in place for a while, which can cause great personal and property loss.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned technical problem among the correlation technique, the utility model provides a lithium cell full life cycle's nitrogen gas safety protection system that fills can provide the environment of a suitable temperature hypoxemia for lithium cell group, reduces the probability of lithium cell thermal runaway diffusion, restraines the lithium cell burning and reburning, improves the security.
In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows:
the utility model provides a lithium cell full life cycle's nitrogen gas safety protection system that fills, includes container and external safety device, be equipped with a plurality of battery rack in the container, both ends are equipped with first air inlet and second air inlet respectively about the container, the first tube coupling on the external safety device is in on the first air inlet, the second tube coupling on the external safety device is in on the second air inlet, nitrogen gas temperature adjustment unit, gas circulation unit and the unit of filling nitrogen have connected gradually on the first pipeline, the end-to-end connection of second pipeline is in on the gas circulation unit, the container is being close to first air inlet inboard and is being equipped with nitrogen gas output monitoring unit, nitrogen gas temperature adjustment unit, gas circulation unit, fill nitrogen unit and nitrogen gas output monitoring unit and all be connected with central control system.
Further, the first air inlet and the second air inlet can both be in bidirectional flow communication.
Furthermore, the nitrogen temperature adjusting unit, the gas circulating unit, the nitrogen charging unit, the nitrogen output monitoring unit and the central control system are all arranged in the external safety protection device.
Furthermore, a first electromagnetic three-way valve, a pipeline fan and a second electromagnetic three-way valve are sequentially arranged on a circulating pipeline of the gas circulating unit, a nitrogen temperature adjusting unit and a nitrogen charging unit are respectively connected to the left and right two-way of the first electromagnetic three-way valve, a third electromagnetic three-way valve is connected to a first electromagnetic three-way valve through a circulating pipeline, and a second pipeline and a through pipe leading to the outside are respectively connected to the two-way of the second electromagnetic three-way valve.
Further, the nitrogen charging unit is provided with a nitrogen making machine, a compressor and a nitrogen storage tank from right to left in sequence on the first pipeline.
Further, the nitrogen output monitoring unit comprises an oxygen detector, a temperature detector, a smoke detector, a comprehensive gas detector and a gas pressure detector.
Preferably, the nitrogen output monitoring unit monitors that the oxygen concentration is less than 15% and the ambient temperature is between 0 ℃ and 40 ℃.
Furthermore, a sealing strip is pasted at the splicing position of the container.
Further, an air conditioner is installed in the external safety protection device.
The utility model has the advantages that: the safety of protecting electric equipment and a system due to the fact that a large amount of diffusion and combustion of single batteries are out of control is avoided, the container or the energy storage cabinet is in a low-oxygen constant-temperature environment for a long time, normal work of the batteries is facilitated, the service life of the batteries can be prolonged under certain conditions, and the safety of the whole container or the energy storage cabinet is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a top view of a nitrogen-filled safety protection system for a full life cycle of a lithium battery according to an embodiment of the present invention;
fig. 2 is a front view of a nitrogen-filled safety protection system for a full life cycle of a lithium battery according to an embodiment of the present invention;
figure 3 is a front view of an external safety shield according to an embodiment of the present invention;
figure 4 is a top view of an external safety shield according to an embodiment of the present invention;
fig. 5 is a schematic view illustrating gas flow in a normal state of a nitrogen-filled safety protection system for a full life cycle of a lithium battery according to an embodiment of the present invention;
fig. 6 is a schematic view of the gas flow in the abnormal state of the nitrogen-filled safety protection system in the full life cycle of the lithium battery according to the embodiment of the present invention.
In the figure:
1. a container; 1-1, a battery holder; 2. an external safety protection device; 2-1, a first pipeline; 2-2, a second pipeline; 3. a nitrogen temperature adjusting unit; 4. a gas circulation unit; 4-1, a first electromagnetic three-way valve; 4-2, pipeline fan; 4-3, a second electromagnetic three-way valve; 5. a nitrogen charging unit; 5-1, a nitrogen making machine; 5-2, a compressor; 5-3, a nitrogen storage tank; 6, a nitrogen output monitoring unit; 7. a central control system; 8. an air conditioner.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
As shown in fig. 1-2, according to the embodiment of the present invention, a nitrogen-filled safety protection system for a lithium battery in a full life cycle comprises a container 1 and an external safety protection device 2, wherein a plurality of battery racks 1-1 are arranged in the container 1, a first air inlet and a second air inlet are respectively arranged at the left and right ends of the container 1, a first pipeline 2-1 on the external safety protection device 2 is connected to the first air inlet, a second pipeline 2-2 on the external safety protection device 2 is connected to the second air inlet, a nitrogen temperature adjustment unit 3, a gas circulation unit 4 and a nitrogen filling unit 5 are sequentially connected to the first pipeline 2-1, the end of the second pipeline 2-2 is connected to the gas circulation unit 4, and a nitrogen output monitoring unit 6 is arranged inside the container 1 near the first air inlet, the nitrogen temperature adjusting unit 3, the gas circulating unit 4, the nitrogen charging unit 5 and the nitrogen output monitoring unit 6 are all connected with a central control system 7.
In a specific embodiment of the present invention, the first air inlet and the second air inlet are both bi-directionally circulated.
As shown in fig. 3-4, in an embodiment of the present invention, the nitrogen temperature adjustment unit 3, the gas circulation unit 4, the nitrogen charging unit 5, the nitrogen output monitoring unit 6 and the central control system 7 are all disposed inside the external safety protection device 2.
In a specific embodiment of the present invention, a first electromagnetic three-way valve 4-1, a pipeline fan 4-2 and a second electromagnetic three-way valve 4-3 are sequentially disposed on a circulation pipeline of the gas circulation unit 4, a nitrogen temperature adjustment unit 3 and a nitrogen charging unit 5 are respectively connected to the left and right two-way of the first electromagnetic three-way valve 4-1, a third electromagnetic three-way valve 4-1 is connected to a first electromagnetic three-way valve 4-3 through a circulation pipeline, and two-way of the second electromagnetic three-way valve 4-3 is respectively connected to a second pipeline 2-2 and a through pipe leading to the outside.
In a specific embodiment of the present invention, the nitrogen charging unit 5 is provided with a nitrogen generator 5-1, a compressor 5-2 and a nitrogen storage tank 5-3 in the first pipeline 2-1 from right to left.
In a specific embodiment of the present invention, the nitrogen output monitoring unit 6 includes an oxygen detector, a temperature detector, a smoke detector, a comprehensive gas detector, and a pressure detector.
In a specific embodiment of the present invention, the nitrogen output monitoring unit 6 monitors that the oxygen concentration is less than 15% and the ambient temperature is between 0 ℃ and 40 ℃.
In a specific embodiment of the present invention, the sealing strip is adhered to the joint of the container 1.
In a specific embodiment of the present invention, an air conditioner 8 is installed in the external safety protection device 2.
For the convenience of understanding the above technical solutions of the present invention, the above technical solutions of the present invention are explained in detail through specific use modes below.
A lithium cell full life cycle's nitrogen gas safety protection system that fills is applied to lithium cell safety protection technical field, mainly include container 1, external safety device 2, nitrogen gas thermoregulation unit 3, gas circulation unit 4, fill nitrogen unit 5, nitrogen gas output monitoring unit 6 and central control system 7.
The sealing strip is pasted at the splicing position of the container 1, so that the container 1 is ensured to have certain sealing performance.
The external safety device 2 can protect all units and systems from working in a good environment.
The nitrogen temperature adjusting unit 3 can rapidly adjust the temperature of the nitrogen to rise and fall, the temperature of the input nitrogen is kept constant at 25 ℃ in a normal state, and a constant-temperature low-oxygen environment is created in the energy storage cabinet.
When the oxygen concentration is lower than the predetermined value of 15%, the nitrogen gas machine 5-1 stops operating. At this time, the gas circulation unit 4 between the first pipe 2-1 and the second pipe 2-2 of the container 1 is opened to maintain the nitrogen concentration and temperature in the container 1.
As shown in fig. 5, in the initial state, nitrogen prepared by the nitrogen machine 5-1 is introduced into the container 1 through the gas circulation unit 4, at this time, the first gas inlet is a gas outlet, the second gas inlet is a gas inlet, and the nitrogen passes through the nitrogen temperature adjustment unit 3 on the first pipeline and flows into the second pipeline through the gas circulation unit 4.
As shown in fig. 6, when the abnormal gas is detected to be generated or the temperature is rapidly increased, the nitrogen machine 5-1 is started to work, low-temperature high-concentration nitrogen is continuously injected into the container 1, the gas circulation unit 4 is closed, the nitrogen directly enters the box body through the first pipeline, at the moment, the first gas inlet is a gas inlet, the second gas inlet is a gas outlet, the gas flows into the second pipeline, and the gas in the box is discharged to the atmosphere through the gas outlet.
The pipeline fan 4-2 pushes the circulating flow of the constant-temperature gas in the box in a normal state, so that the sensitivity of abnormal gas detection can be improved, and the cost is effectively reduced by recycling the gas.
A nitrogen making machine 5-1 of the nitrogen filling unit 5 produces nitrogen, a compressor 5-2 compresses the produced nitrogen, and the compressed nitrogen is transferred to a nitrogen storage tank 5-3 to be stored, so that sufficient nitrogen is kept constantly.
The air pressure detector is arranged in the container 1 to monitor the internal pressure of the container 1 in real time, when the internal pressure is overlarge, the nitrogen output monitoring unit gives an alarm, and the central control system 7 controls the exhaust valve to be opened.
The oxygen content detector is arranged in the container 1, the concentration of oxygen in the container 1 is monitored in real time, the container 1 is ensured to be in a low-oxygen environment, and when the oxygen concentration is higher than a preset value by 15%, the nitrogen machine is started until the concentration is lower than a set value.
The central control system 7 performs signal acquisition, analysis and decision distribution, and the central control system 7 can realize the overall control of all units, including the control of abnormal signals of the air pressure detector and the oxygen concentration detector, and make a reasonable processing method through the analysis of the central control system 7.
To sum up, with the help of the above technical scheme of the utility model, having avoided because of the stretching of a large amount of diffusion and the burning of battery cell thermal runaway, the safety of protection consumer and system, container or energy storage cabinet are in the homothermal environment of hypoxemia for a long time, help the normal work of battery, can prolong battery life under the certain condition to improve the security of whole container or energy storage cabinet.
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 (9)
1. The nitrogen-filled safety protection system for the full life cycle of the lithium battery comprises a container (1) and an external safety protection device (2), wherein a plurality of battery racks (1-1) are arranged in the container (1), and is characterized in that a first air inlet and a second air inlet are respectively arranged at the left end and the right end of the container (1), a first pipeline (2-1) on the external safety protection device (2) is connected onto the first air inlet, a second pipeline (2-2) on the external safety protection device (2) is connected onto the second air inlet, a nitrogen temperature regulation unit (3), a gas circulation unit (4) and a nitrogen filling unit (5) are sequentially connected onto the first pipeline (2-1), the tail end of the second pipeline (2-2) is connected onto the gas circulation unit (4), the container (1) is provided with a nitrogen output monitoring unit (6) close to the inner side of the first air inlet, and the nitrogen temperature adjusting unit (3), the gas circulating unit (4), the nitrogen charging unit (5) and the nitrogen output monitoring unit (6) are all connected with a central control system (7).
2. The nitrogen-filled safety protection system for a lithium battery of claim 1, wherein the first inlet port and the second inlet port are both bi-directional.
3. The nitrogen-filled safety protection system for the full life cycle of the lithium battery as claimed in claim 1, wherein the nitrogen temperature regulation unit (3), the gas circulation unit (4), the nitrogen-filled unit (5), the nitrogen output monitoring unit (6) and the central control system (7) are all arranged in the external safety protection device (2).
4. The nitrogen-filled safety protection system for the full life cycle of the lithium battery as claimed in claim 1, wherein a first electromagnetic three-way valve (4-1), a pipeline fan (4-2) and a second electromagnetic three-way valve (4-3) are sequentially arranged on a circulation pipeline of the gas circulation unit (4), the left and right two ways of the first electromagnetic three-way valve (4-1) are respectively connected with the nitrogen temperature regulation unit (3) and the nitrogen-filled unit (5), the third way of the first electromagnetic three-way valve (4-1) is connected with the first way of the second electromagnetic three-way valve (4-3) through a circulation pipeline, and the two ways of the second electromagnetic three-way valve (4-3) are respectively connected with the second pipeline (2-2) and a through pipe leading to the outside.
5. The nitrogen-filled safety protection system for the full life cycle of the lithium battery as claimed in claim 1, wherein the nitrogen-filled unit (5) is provided with a nitrogen generator (5-1), a compressor (5-2) and a nitrogen storage tank (5-3) in sequence from right to left in the first pipeline (2-1).
6. The nitrogen-filled safety protection system for the full life cycle of the lithium battery as claimed in claim 1, wherein the nitrogen output monitoring unit (6) comprises an oxygen detector, a temperature detector, a smoke detector, a comprehensive gas detector and a gas pressure detector.
7. The nitrogen-filled safety protection system for the full life cycle of the lithium battery as claimed in claim 6, wherein the nitrogen output monitoring unit (6) monitors that the oxygen concentration is less than 15% and the ambient temperature is between 0 ℃ and 40 ℃.
8. The nitrogen-filled safety protection system for the full life cycle of the lithium battery as claimed in claim 1, wherein a sealing strip is adhered to the splicing part of the container (1).
9. The nitrogen-filled safety protection system for the full life cycle of the lithium battery as claimed in claim 1 or 3, wherein an air conditioner (8) is installed in the external safety protection device (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020078012.7U CN211238342U (en) | 2020-01-15 | 2020-01-15 | Nitrogen charging safety protection system for lithium battery in full life cycle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020078012.7U CN211238342U (en) | 2020-01-15 | 2020-01-15 | Nitrogen charging safety protection system for lithium battery in full life cycle |
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| CN211238342U true CN211238342U (en) | 2020-08-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114872563A (en) * | 2021-07-06 | 2022-08-09 | 宇通客车股份有限公司 | Power battery nitrogen protection system |
| WO2024156130A1 (en) * | 2023-01-26 | 2024-08-02 | 宁德时代未来能源(上海)研究院有限公司 | Fire-fighting system and energy storage system |
-
2020
- 2020-01-15 CN CN202020078012.7U patent/CN211238342U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114872563A (en) * | 2021-07-06 | 2022-08-09 | 宇通客车股份有限公司 | Power battery nitrogen protection system |
| CN114872563B (en) * | 2021-07-06 | 2024-03-19 | 宇通客车股份有限公司 | Nitrogen protection system of power battery |
| WO2024156130A1 (en) * | 2023-01-26 | 2024-08-02 | 宁德时代未来能源(上海)研究院有限公司 | Fire-fighting system and energy storage system |
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Address after: Room 2901, 25 / F, block a, No. 72, Xisanhuan North Road, Haidian District, Beijing 100048 Patentee after: Beijing Phoenix Electronic Materials Technology Research Institute Co.,Ltd. Address before: Room 2901, 25 / F, block a, No. 72, Xisanhuan North Road, Haidian District, Beijing 100048 Patentee before: Beijing Phoenix Electronic Technology Co.,Ltd. |
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