CN216436054U - Gas protection type lithium battery energy storage container - Google Patents
Gas protection type lithium battery energy storage container Download PDFInfo
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- CN216436054U CN216436054U CN202122767076.5U CN202122767076U CN216436054U CN 216436054 U CN216436054 U CN 216436054U CN 202122767076 U CN202122767076 U CN 202122767076U CN 216436054 U CN216436054 U CN 216436054U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model discloses a gas protection type lithium battery energy storage container, which comprises a totally closed box body, wherein a flame retardant gas inlet device and a gas exhaust device in the box body are arranged on the box body; an inner-box temperature adjusting device is installed on one side of the box body, an inner-circulating air cavity is formed in the bottom of the box body, a plurality of inner-circulating airflow air outlets are distributed on the bottom wall of the box body, an inner-circulating fan is installed on one side of the box body, and the air outlets of the inner-circulating fan are communicated with the inner-circulating air cavity; an in-box risk parameter detection device and a controller are arranged in the box body; when oxygen or combustible gas in the box body is too high in concentration, too high or too low in temperature and too high or too low in air pressure, the oxygen or combustible gas can be detected in time through the in-box risk parameter detection device to give an alarm, the energy storage battery module group is timely cut off from external electrical isolation according to different conditions, the air pressure in the box is adjusted to be in a micro-positive pressure state, the temperature is adjusted, and other regulation measures are taken, so that serious consequences such as deflagration are prevented.
Description
Technical Field
The utility model relates to a lithium cell energy storage trade especially relates to a gas protection formula lithium cell energy storage container.
Background
With the gradual increase of energy crisis, various renewable energy sources mainly including solar energy, wind energy and the like are gradually valued and researched by human beings, but the generated electric energy is unstable due to the large influence of time and weather, and a large amount of electric energy generated by the electric energy is required to be stored to ensure stable supply so as to ensure the normal operation of production and life. Since the advent of lithium ion batteries, lithium ion batteries have been widely used in modern digital products such as mobile phones and notebook computers due to their advantages of high energy density, long service life, high rated voltage, and the like. With the development of the energy storage industry, lithium ion batteries represented by lithium iron phosphate are being gradually applied to the energy storage industry, and the installed capacity is increasing year by year. The safety problem of lithium battery energy storage cannot be solved, and the development of the lithium battery energy storage market is very difficult.
If the lithium battery energy storage is continuously developed, two important problems need to be solved. Firstly, because the difference in the lithium cell electricity core production process, must guarantee the life of lithium cell through battery equalizing system, good battery equalizing system can guarantee that the module life-span is close to electric core life-span. Particularly in a large-capacity energy storage power station, due to the high investment of the energy storage power station, the long service life of the energy storage battery module is not guaranteed, and the investment is likely to be not carried out. Most of the existing lithium battery equalization systems are BMS management systems with low currents, the equalization currents generally do not exceed 5A, and the equalization currents are too small for large energy storage modules to maintain the voltage consistency among the modules. The battery of a certain module is easy to overcharge or overdischarge, the formation of lithium dendrites in the battery core is caused, a lithium battery diaphragm is punctured, short circuit and thermal runaway are caused, and finally the safety problem is caused.
And the other is the problem of processing the energy storage module after thermal runaway. Even with a superior management system, it is impossible to completely ensure that the energy storage of the lithium battery is absolutely constant, so the thermal runaway processing mechanism of the lithium battery module is important. In recent years, the phenomenon of explosion of energy storage power stations appears many times at home and abroad, so that energy storage manufacturers of lithium batteries are difficult to move forward and backward, and the method has a wide development prospect and a safety problem. Because the investment of the energy storage power station is huge, one-time blasting has great influence on enterprises and is even fatal.
Disclosure of Invention
The utility model aims to solve the technical problem that a gas protection formula lithium cell energy storage container through in time report to the police and sparse combustible gas, can effectively prevent deflagration is provided.
In order to solve the technical problem, the technical scheme of the utility model is that: a gas protection type lithium battery energy storage container comprises a fully-closed box body, wherein a flame-retardant gas inlet device is installed at the bottom of one side of the box body, and an in-box gas exhaust device is installed at the top of the other side of the box body; an inner-box temperature adjusting device is installed on one side of the box body, an inner-circulating air cavity is formed in the bottom of the box body, a plurality of inner-circulating airflow air outlets communicated with the inner-circulating air cavity are distributed on the bottom wall of the box body, an inner-circulating fan is installed on one side of the box body, and an air outlet of the inner-circulating fan is communicated with the inner-circulating air cavity;
the device comprises a box body, and is characterized in that an in-box risk parameter detection device and a controller are installed in the box body, the signal output end of the in-box risk parameter detection device is connected with the controller, and the controller is connected with a flame-retardant gas inlet device, an in-box gas exhaust device and an in-box temperature adjusting device.
As a preferable technical solution, the fire retardant gas inlet device includes an inlet pipe disposed at the bottom of one side of the box body, an inlet electromagnetic valve is mounted on the inlet pipe, a control end of the inlet electromagnetic valve is connected with the controller, and one end of the inlet pipe extends out of the bottom of the box body and is connected with a fire retardant gas pipeline or a fire retardant gas storage tank.
As a preferable technical solution, the device for exhausting gas in the tank comprises an exhaust pipe installed at the top of the tank body, an exhaust solenoid valve is installed on the exhaust pipe, and a control end of the exhaust solenoid valve is connected with the controller.
As a preferred technical scheme, the in-box temperature adjusting device comprises an air conditioner external unit installed outside the box body, an air conditioner internal unit is installed in the box body in a matched manner, and a control end of the air conditioner internal unit is connected with the controller.
As a preferable technical scheme, the in-box risk parameter detection device comprises an oxygen concentration sensor, a pressure sensor, a combustible gas concentration sensor and a temperature sensor which are arranged inside the box body, signal output ends of the oxygen concentration sensor, the pressure sensor, the combustible gas concentration sensor and the temperature sensor are connected with the controller, and a signal output end of the controller is connected with the flame-retardant gas inlet device, the in-box gas exhaust device and the in-box temperature adjusting device.
As a preferred solution, the controller includes a programmable logic device.
As a preferable technical scheme, the bottom wall of the box body is of a double-layer structure, and the inner circulating air cavity extends and is flatly paved in the whole bottom wall of the box body.
As a preferred technical scheme, the inner circulation airflow outlets are distributed on the bottom wall of the box body in a non-equidistant and balanced manner or distributed on the bottom wall of the box body in a balanced manner with different apertures.
As a preferred technical scheme, an insulating layer is arranged on the outer wall of the box body.
Due to the adoption of the technical scheme, the gas protection type lithium battery energy storage container comprises a fully-closed box body, wherein a flame-retardant gas inlet device is arranged at the bottom of one side of the box body, and an in-box gas exhaust device is arranged at the top of the other side of the box body; an inner-box temperature adjusting device is installed on one side of the box body, an inner-circulating air cavity is formed in the bottom of the box body, a plurality of inner-circulating airflow air outlets communicated with the inner-circulating air cavity are distributed on the bottom wall of the box body, an inner-circulating fan is installed on one side of the box body, and an air outlet of the inner-circulating fan is communicated with the inner-circulating air cavity; an in-box risk parameter detection device and a controller are installed in the box body, the signal output end of the in-box risk parameter detection device is connected with the controller, and the controller is connected with the flame-retardant gas inlet device, the in-box gas exhaust device and the in-box temperature adjusting device; when oxygen or combustible gas in the box body is too high in concentration, too high or too low in temperature and too high or too low in air pressure, the oxygen or combustible gas can be detected in time through the in-box risk parameter detection device to give an alarm, the energy storage battery module group is timely cut off from external electrical isolation according to different conditions, the air pressure in the box is adjusted to be in a micro-positive pressure state, the temperature is adjusted, and other regulation measures are taken, so that serious consequences such as deflagration are prevented.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a perspective view of an embodiment of the invention;
fig. 3 is a side view of an embodiment of the present invention;
in the figure: 1-a box body; 21-an internal circulation airflow outlet; 22-internal circulation fan; 3-a flame retardant gas storage tank; 41-an air conditioner outdoor unit; 42-air conditioner indoor unit; 51-a battery module; 52-inverter power cabinet.
Detailed Description
The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in fig. 1, 2 and 3, the gas protection type lithium battery energy storage container comprises a totally-enclosed container body 1, wherein the container body is a 1-position heat preservation container body 1, a heat preservation layer is arranged on the outer wall of the container body 1, a flame-retardant gas inlet device is arranged at the bottom of one side of the container body 1, and an in-container gas exhaust device is arranged at the top of the other side of the container body 1; an in-box temperature adjusting device is arranged on one side of the box body 1, an internal circulating air cavity is arranged at the bottom of the box body 1, the bottom wall of the box body 1 is of a double-layer structure, the internal circulation air cavity extends and is flatly laid in the bottom wall of the whole box body 1, a plurality of internal circulation airflow air outlets 21 communicated with the internal circulation air cavity are distributed on the bottom wall of the box body 1, the internal circulation airflow outlets 21 are arranged on the bottom wall of the box body 1 in a non-equidistant balanced manner or on the bottom wall of the box body 1 in a balanced manner with different apertures, one side of the box body 1 is provided with two internal circulation fans 22, an air outlet of the internal circulation fan 22 is communicated with the internal circulation air cavity, specifically, the internal circulation fan 22 is arranged at the middle upper part in the box body 1, and an air outlet of the internal circulation fan is communicated with the internal circulation air cavity through a vertically extending air duct; an in-box risk parameter detection device and a controller are installed in the box body 1, the signal output end of the in-box risk parameter detection device is connected with the controller, and the controller is connected with the flame-retardant gas inlet device, the in-box gas exhaust device and the in-box temperature adjusting device.
The flame-retardant gas inlet device (not shown in the figure) comprises an air inlet pipe arranged at the bottom of one side of the box body 1, an air inlet electromagnetic valve is installed on the air inlet pipe, the control end of the air inlet electromagnetic valve is connected with a controller, and one end of the air inlet pipe extends out of the bottom of the box body 1 and is connected with a flame-retardant gas pipeline or a flame-retardant gas storage tank 3. The gas discharging device (not shown in the figure) in the box comprises an exhaust pipe arranged at the top of the box body 1, an exhaust electromagnetic valve is arranged on the exhaust pipe, and the control end of the exhaust electromagnetic valve is connected with the controller.
The in-box temperature adjusting device comprises an air conditioner external unit 41 arranged outside the box body 1, an air conditioner internal unit 42 is arranged in the box body 1 in a matched mode, and the control end of the air conditioner internal unit 42 is connected with the controller. The in-box risk parameter detection device (not shown in the figure) comprises an oxygen concentration sensor, a pressure sensor, a combustible gas concentration sensor and a temperature sensor which are arranged inside the box body 1, wherein the oxygen concentration sensor, the pressure sensor, the combustible gas concentration sensor and the temperature sensor are connected through signal output ends of the controller, and the signal output end of the controller is connected with the flame-retardant gas inlet device, the in-box gas exhaust device and the in-box temperature adjusting device. The controller includes a programmable logic device, such as a single chip.
A battery module 51 and an inverter power cabinet 52 are installed in the container body 1 of the container.
When a certain energy storage module takes place the thermal runaway trouble in the container, can lead to electrolyte to leak outward, the carbonate organic matter in the electrolyte is mostly low boiling point material, very easily volatilizees and decomposes, and the flash point is lower. Once exposed to combustion-supporting gas (air or oxygen), the volatile organic solvent may burn or explode when a heat source (e.g., spark) is provided by thermal runaway of the battery module 51. Once a certain battery module 51 is detonated, the entire container or the energy storage power station is highly likely to cause a chain reaction. For the security of guarantee lithium electricity energy storage container, this application provides a gas protection formula energy storage container. The main technical points are as follows:
1. the energy storage container adopts the fully sealed box body 1, and gas exchange between gas in the container and air outside the container is prevented.
2. The energy storage container is provided with a flame-retardant gas inlet electromagnetic valve and an exhaust electromagnetic valve. After the internal components are installed, on the premise that the exhaust electromagnetic valve is opened, the air inlet electromagnetic valve slowly fills flame-retardant gas into the container, and the main purpose is to exhaust air (oxygen) in the container and ensure that the oxygen content in the container is far lower than the lower explosion limit of the carbonate organic volatile matters or the decomposition products thereof.
3. An oxygen concentration sensor is arranged in the container, so that the oxygen concentration in the container after the flame retardant gas is injected is far lower than the lower explosion limit of the carbonic acid lipid and the decomposition products thereof which are possibly leaked. In the working state, once the oxygen concentration is detected to exceed the standard, the alarm is immediately given and corresponding treatment is made, and the tightness of the container is checked.
4. The inside pressure sensor that sets up of container through the on-off state of control air inlet solenoid valve with exhaust solenoid valve, guarantees that the 1 internal pressure of box after pouring into flame retardant gas is a little greater than the external air pressure of box 1, prevents that the air outside the box 1 from passing through in the gap gets into the container. The switch state of the air inlet/outlet electromagnetic valve is adjusted in real time according to the change of the environmental temperature, and the constant micro-positive pressure inside the container is maintained through the injection and discharge of the flame retardant gas.
5. Inside organic combustible gas concentration sensor and the temperature sensor of setting up of container, when detecting concentration or temperature and surpass standard, in time send alarm control, the charge and discharge switch of the corresponding battery module 51 of disconnection or container carries out electrical isolation, prevents the emergence of continuous leakage or thermal runaway of lithium cell electrolyte.
6. The inside wind cycle that sets up of energy storage container guarantees the heat equilibrium of inside, prevents that the unable effluvium of heat in certain region from leading to the electric core because of the thermal runaway of overheated production. Meanwhile, the air conditioner is arranged inside the energy storage container to adjust the temperature, so that the lithium battery can work at a proper temperature in different regions or environments.
The beneficial effects of this technical scheme are:
through to the inside fire-retardant gas that injects of container, even thermal runaway appears in the electric core when in the container, owing to lack corresponding combustion-supporting gas, the burning phenomenon can not take place for the container battery. Meanwhile, various sensors configured in the container are used for timely sensing parameters such as the concentration of combustible gas, the concentration of oxygen, the temperature, the pressure and the like in the container body 1, corresponding alarm and control are timely sent out, and the possibility of thermal runaway of the energy storage container is further reduced.
Based on the above principle, the method is explained by using a carbon dioxide gas protection mode:
1. the container is characterized in that a carbon dioxide inlet is arranged at the bottom of the container, and an exhaust port is arranged on the diagonal side of the carbon dioxide inlet of the container, namely the exhaust port is positioned at the top of the diagonal direction of the carbon dioxide inlet. Carbon dioxide is injected from the bottom by utilizing the characteristic that the specific gravity of the carbon dioxide is larger than that of the air, and the air is slowly discharged from the top. If the strength of the container body 1 is allowed, the low vacuum can be pre-pumped and then the carbon dioxide can be injected.
2. When the oxygen concentration in the tank body is far lower than the lower explosion limit of the corresponding combustible organic gas, the exhaust electromagnetic valve is closed, and the carbon dioxide is continuously charged to the pressure of 500Pa (relative to the pressure of the environment outside the tank body 1), and then the carbon dioxide charging is stopped. The air inlet electromagnetic valve, the air exhaust electromagnetic valve and the pressure sensor are in a linkage state, and when the pressure is detected to be too high or too low, the corresponding electromagnetic valves are opened or closed in time.
3. When the thermal runaway happens to a certain group of battery modules 51 in the container, and the electrolyte leaks, the possibility of contact between the electrolyte and the volatile and decomposed substances thereof with oxygen is avoided because the container is internally filled with carbon dioxide, and explosion is avoided. Meanwhile, the combustible gas concentration sensor is used for detecting the electrolyte leakage, and the charging and discharging switches are cut off in time to carry out electrical isolation, so that the chain reaction caused by thermal runaway is prevented. When the temperature in the container is too high, the charging and discharging switches are cut off to perform electrical isolation, so that the chain reaction caused by thermal runaway is prevented.
4. Inside circulation fan that sets up of container prevents the heat accumulation of container local position, leads to electric core high temperature and opens electric core pressure switch, and then leads to electrolyte to leak. Meanwhile, the air conditioner is arranged in the container to adjust the temperature, so that the temperature inside the container is kept constant, and the lithium battery works in a proper temperature state.
5. For the energy storage device of a single container, a carbon dioxide gas cylinder can be configured, and trace carbon dioxide can be charged in real time. Corresponding gas circuit pipelines and electromagnetic valve control can be arranged for the large container energy storage group so as to maintain constant micro-positive pressure inside the energy storage container.
The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a gas protection formula lithium cell energy storage container, includes totally closed box, its characterized in that: the bottom of one side of the box body is provided with a flame-retardant gas inlet device, and the top of the other side of the box body is provided with an in-box gas exhaust device; an inner-box temperature adjusting device is installed on one side of the box body, an inner-circulating air cavity is formed in the bottom of the box body, a plurality of inner-circulating airflow air outlets communicated with the inner-circulating air cavity are distributed on the bottom wall of the box body, an inner-circulating fan is installed on one side of the box body, and an air outlet of the inner-circulating fan is communicated with the inner-circulating air cavity;
the device comprises a box body, and is characterized in that an in-box risk parameter detection device and a controller are installed in the box body, the signal output end of the in-box risk parameter detection device is connected with the controller, and the controller is connected with a flame-retardant gas inlet device, an in-box gas exhaust device and an in-box temperature adjusting device.
2. The gas-protected lithium battery energy storage container of claim 1, wherein: the flame-retardant gas inlet device comprises an air inlet pipe arranged at the bottom of one side of the box body, an air inlet electromagnetic valve is arranged on the air inlet pipe, the control end of the air inlet electromagnetic valve is connected with the controller, and one end of the air inlet pipe extends out of the bottom of the box body and is connected with a flame-retardant gas pipeline or a flame-retardant gas storage tank.
3. The gas-protected lithium battery energy storage container of claim 1, wherein: the gas exhaust device in the box comprises an exhaust pipe arranged at the top of the box body, an exhaust electromagnetic valve is arranged on the exhaust pipe, and the control end of the exhaust electromagnetic valve is connected with the controller.
4. The gas-protected lithium battery energy storage container of claim 1, wherein: the temperature adjusting device in the box comprises an air conditioner outer unit arranged outside the box body, an air conditioner inner unit is arranged in the box body in a matched mode, and the control end of the air conditioner inner unit is connected with the controller.
5. The gas-protected lithium battery energy storage container of claim 1, wherein: the device for detecting the risk parameters in the box comprises an oxygen concentration sensor, a pressure sensor, a combustible gas concentration sensor and a temperature sensor which are arranged in the box body, wherein the oxygen concentration sensor, the pressure sensor, the combustible gas concentration sensor and the temperature sensor are connected through signal output ends of the controller, and the signal output end of the controller is connected with a flame-retardant gas inlet device, a box gas exhaust device and a box internal temperature adjusting device.
6. The gas-protected lithium battery energy storage container of claim 1, wherein: the controller includes a programmable logic device.
7. A gas protected lithium battery energy storage container as claimed in any one of claims 1 to 6, wherein: the bottom wall of the box body is of a double-layer structure, and the internal circulation air cavity extends and is flatly paved in the whole bottom wall of the box body.
8. A gas protected lithium battery energy storage container as claimed in any one of claims 1 to 6, wherein: the inner circulation airflow outlets are distributed on the bottom wall of the box body in an unequal-distance balanced manner or distributed on the bottom wall of the box body in a balanced manner with different calibers.
9. The gas-protected lithium battery energy storage container of claim 1, wherein: and the outer wall of the box body is provided with a heat insulation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122767076.5U CN216436054U (en) | 2021-11-12 | 2021-11-12 | Gas protection type lithium battery energy storage container |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122767076.5U CN216436054U (en) | 2021-11-12 | 2021-11-12 | Gas protection type lithium battery energy storage container |
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| CN216436054U true CN216436054U (en) | 2022-05-03 |
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| CN202122767076.5U Active CN216436054U (en) | 2021-11-12 | 2021-11-12 | Gas protection type lithium battery energy storage container |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115377586A (en) * | 2022-07-22 | 2022-11-22 | 北京合康新能科技股份有限公司 | Box body assembly, energy storage device and control method and control device of energy storage device |
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2021
- 2021-11-12 CN CN202122767076.5U patent/CN216436054U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115377586A (en) * | 2022-07-22 | 2022-11-22 | 北京合康新能科技股份有限公司 | Box body assembly, energy storage device and control method and control device of energy storage device |
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