CN207834534U - Battery pack temperature control device and battery pack temperature control system - Google Patents
Battery pack temperature control device and battery pack temperature control system Download PDFInfo
- Publication number
- CN207834534U CN207834534U CN201721769376.4U CN201721769376U CN207834534U CN 207834534 U CN207834534 U CN 207834534U CN 201721769376 U CN201721769376 U CN 201721769376U CN 207834534 U CN207834534 U CN 207834534U
- Authority
- CN
- China
- Prior art keywords
- temperature
- battery pack
- coolant
- coolant liquid
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Landscapes
- Secondary Cells (AREA)
Abstract
The utility model is related to battery pack temperature control device and battery pack temperature control systems, including:Coolant circulation system is adjusted battery pack temperature suitable for passing through coolant liquid;Humidity control system is suitable for adjusting coolant liquid into trip temperature.The battery pack temperature control device, with real time monitoring cooling pipe temperature, drive coolant liquid cycle, coolant liquid is heated automatically after more than set temperature, is freezed, it realizes and the reliable temperature of lithium battery monomer stabilization is controlled, the heating problem in lithium battery charging, discharge process is solved, adaptability of the lithium battery to high temperature, low temperature environment is greatly improved.
Description
Technical field
The utility model belongs to vehicular traffic technical field, and in particular to a kind of battery pack temperature control device and battery pack
Temperature control system.
Background technology
The battery types used in the urgent traction technique of accumulator of track vehicle application at present be mainly high magnification,
The lead-acid battery or nickel-cadmium cell of ultra-high magnifications.Lead-acid battery and nickel-cadmium cell technology maturation, there is that price is low, simple production process
The advantage low with maintenance cost.Especially lead-acid battery and nickel-cadmium cell have calorific value small, and the consistency of battery cell is good etc.
Advantage, thus battery cell need not be monitored and temperature control.It can be real using the battery traction of the type battery
Shunting for existing relatively short distance is rescued certainly with vehicle.
But the accumulator of lead-acid battery and nickel-cadmium cell is used promptly to draw, the specific power for being limited to battery is small, energy
The problems such as density is small, train cannot achieve steep gradient and long-distance running, and be served only for short distance in library now shunts more.With storage
The raising of the urgent hauling ability index of battery, the requirement to battery are also higher and higher.Because lithium battery has service life cycle
The features such as length, energy density are high, efficiency for charge-discharge is high, volume and weight is small, environmentally friendly, safe and non-maintaining, so lithium in recent years
Battery gradually starts to apply in accumulator is promptly drawn.But the application of lithium battery is very heavy to the temperature control of battery cell
It wants, once temperature control can cause the reduction of battery traction function even to be lost, so finding a kind of efficient, reliable and stable
Battery module temperature control equipment is highly desirable.
Utility model content
The purpose of this utility model is to provide a kind of battery pack temperature control device, is existed with solving lithium battery in the prior art
It can not effectively be realized in application process and lithium battery group is regulated and controled into trip temperature.
In order to solve the above-mentioned technical problem, the utility model provides a kind of battery pack temperature control device, including:It is cooling
Fluid circulation is adjusted battery pack temperature suitable for passing through coolant liquid;Humidity control system is suitable for carrying out temperature to coolant liquid
Degree is adjusted.
Optionally, the coolant circulation system includes:The inlet and outlet pipe lines circulated suitable for coolant liquid;Suitable for storage
The water tank of coolant liquid;Suitable for driving the water pump of coolant liquid cycle;Suitable for excluding the air bleeding valve of gas in coolant liquid;And suitable for pair
The heater that coolant liquid heats in the water tank;The heater is suitable for heating coolant liquid in the water tank.
Optionally, the inlet and outlet pipe lines include:Inlet and outlet pipes, wherein being equipped at the water inlet line
Temperature sensor, to detect coolant temperature;And cock is installed at the outlet conduit end, to detect cooling liquid stream
Dynamic state.
Optionally, the humidity control system includes:Compressor, evaporator, condenser, expansion valve and heater, wherein
The liquid refrigerant for the low-temp low-pressure that the evaporator is suitable for exporting the expansion valve carries out heat exchange with coolant liquid, and gasification is inhaled
Thermosetting low pressure refrigerant vapor;The refrigerant that the compressor is suitable for sucking low-temp low-pressure from the evaporator air intake duct steams
The refrigerant gas of high temperature and pressure is discharged in vapour after compression;The height that the condenser is suitable for be discharged after the compressor compresses
The refrigerant gas of warm high pressure, radiates through extraneous air, forms high pressure refrigerant liquid;And be suitable for will be described for the expansion valve
The high pressure refrigerant liquid of condenser output, throttles into low-temp low-pressure liquid refrigerant.
Optionally, the battery pack temperature control device further includes:For monitoring the water tank internal coolant water level
Liquid level sensor;And the condenser back side is adapted to mount to carry out cooling fan to condenser.
Optionally, the battery pack temperature control device further includes:Suitable for adjusting system to coolant circulation system and temperature
The external control system that system is controlled, wherein the external control system includes:Control box, the control box are suitable for setting cold
But liquid desired temperature value and temperature control bound;When coolant temperature is in control range, the control box controls water pump
Work;When coolant temperature is less than temperature lower control limit, the control box control humidity control system starts heating mode, right
Coolant liquid heats, until reaching set temperature value;When coolant temperature is higher than temperature upper control limit, the control box control temperature
It spends regulating system and starts refrigeration mode, cool down to coolant liquid, until reaching set temperature value.
Another aspect, the utility model additionally provide a kind of battery pack temperature control system, including battery pack temperature control
Device.
The utility model has the beneficial effects that using lithium battery group temperature control equipment, there is real time monitoring cooling pipe
Temperature, driving coolant liquid cycle, automatically heats coolant liquid after more than set temperature, is freezed, realized to lithium battery
The reliable temperature control of monomer stabilization, solves the heating problem in lithium battery charging, discharge process, lithium battery is greatly improved to height
Temperature, the adaptability of low temperature environment.
Description of the drawings
In order to illustrate more clearly of the technical solution of the utility model embodiment, the attached drawing of embodiment will be made below simple
Ground introduction, it should be apparent that, the accompanying drawings in the following description merely relates to some embodiments of the utility model, rather than to this practicality
Novel limitation.
Fig. 1 is the stereogram of the battery pack temperature control device of the utility model;
Fig. 2 is the front view of the battery pack temperature control device of the utility model;
Fig. 3 is the vertical view of the battery pack temperature control device removal head cover of the utility model;
Fig. 4 is the inlet and outlet pipe figure between the battery pack temperature control device of the utility model and battery module.In figure:
Coolant circulation system 100, humidity control system 200, shell 2, cock 3,
4 temperature sensor 5 of liquid level sensor, compressor 6, evaporator 7, condenser 8, expansion valve 9,
Air bleeding valve 10, water pump 11, water tank 12, fan 13, harness 14,
Inlet and outlet pipe lines 15, water inlet line 151, outlet conduit 152;Heater 16, control box 17.
Specific implementation mode
The Fig. 1 to Fig. 4 being discussed below, and the various realities in this patent document for describing the principles of the present invention
It applies example to be intended merely to illustrate, without should be to be considered as limiting the scope of the utility model in any way.People in the art
Member is it will be appreciated that the principles of the present invention can be embodied in any suitably battery pack temperature control device.For describing
The term of various embodiments is exemplary.It should be understood that providing these only to assist in understanding this specification, and it
Use and define and do not limit the scope of the utility model in any way.Had to distinguish using term first, second etc.
The object of same term collection, and be not intended to indicate chronological order in any way, unless expressly stated otherwise,.Group is defined as wrapping
Non-empty group containing at least one element.
It is new below in conjunction with this practicality to keep the purpose, technical scheme and advantage of the utility model embodiment clearer
The technical solution of the utility model embodiment is clearly and completely described in the attached drawing of type embodiment.Obviously, described
Embodiment is a part of the embodiment of the utility model, instead of all the embodiments.Based on described the utility model
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of without creative work, all belongs to
In the scope of protection of the utility model.It should be understood that exemplary embodiments described herein should be to be considered only as retouching
The property stated, rather than the purpose for limitation.It should usual quilt to the description of the features or aspect in each exemplary embodiment
Think to can be used for features or aspect similar in other exemplary embodiments.
Embodiment 1
The stereogram of battery pack temperature control device accoding to exemplary embodiment as illustrated in FIG. 1, battery pack in figure
Temperature control equipment includes:Coolant circulation system 100, humidity control system 200, external control system 300.Wherein coolant liquid
The circulatory system 100 is suitable for that battery pack temperature is adjusted by coolant liquid, and humidity control system 200 is suitable for carrying out coolant liquid
Temperature is adjusted, and external control system 300 is suitable for controlling coolant circulation system and humidity control system.
Battery pack includes at least one battery module.
In the present embodiment control box 17 be battery pack temperature control device control section, can adjust preset temperature and
The temperature difference, control temperature control equipment are in standby cycle, heating or refrigeration work state;Control box 17 passes through harness 14 and battery
Other electric components of group temperature control equipment form electrical connection.Battery pack temperature control device passes through external four fixed seats peace
Inside the urgent traction accumulator case of rail vehicle;It is mounted with that liquid level sensor 4 is used for supervising outside temperature control equipment shell 2
Survey water tank internal coolant water level;Inlet and outlet pipe lines 15 are also connected with outside temperature control equipment shell 2, cock 3 is mounted on
On outlet conduit 152, coolant flow is monitored, working signal is sent to rail traffic vehicles.
The front view of battery pack temperature control device accoding to exemplary embodiment as illustrated in FIG. 2 outputs in figure
100 structure composition of humidity control system comprising the inlet and outlet pipe lines 15 circulated suitable for coolant liquid;Suitable for storing coolant liquid
Water tank 12;Suitable for driving the water pump 11 of coolant liquid cycle;Suitable for excluding the air bleeding valve 10 of gas in coolant liquid, to keep cooling
Efficiency.Inlet and outlet pipe lines 15 include:Water inlet line 151 and outlet conduit 152 are wherein equipped with temperature biography at water inlet line 151
Sensor 5, to detect coolant temperature;And cock 3 is installed at 152 end of outlet conduit, to detect coolant flow shape
State, for detecting whether coolant liquid flows.
Coolant liquid desired temperature is set by control box 17 and temperature controls bound, works as coolant temperature under normal circumstances
When in control range, battery pack temperature control device can control the work of water pump 11, be in standby cycle pattern;Work as coolant liquid
When actual temperature is less than temperature lower control limit, start heating mode automatically, coolant liquid is heated, until reach set temperature value,
And when coolant liquid actual temperature is higher than temperature upper control limit, start refrigeration mode automatically, cool down to coolant liquid, is set until reaching
Constant temperature angle value, operating mode switching is automatically controlled by control box 17 completely is not required to manual switching;Temperature sensor 5 be mounted on into
On waterpipe 151, for monitoring the coolant temperature for flowing into battery pack temperature control device, to reach monitoring controlled plant temperature
The effect of degree.
The vertical view of battery pack temperature control device removal head cover accoding to exemplary embodiment as illustrated in FIG. 3, figure
In illustrate humidity control system 200 internal structure composition.Humidity control system 200 includes:It is compressor 6, evaporator 7, cold
Condenser 8, expansion valve 9, heater 16 and fan 13.
Evaporator 7 is the liquid refrigerant and coolant liquid of the low-temp low-pressure for exporting expansion valve 9 in the present embodiment
Heat exchange is carried out, gasification heat absorption forms low pressure refrigerant vapor, to cool down to coolant liquid, achievees the effect that refrigeration;Compressor 6
The refrigerant vapour that low-temp low-pressure is sucked from 7 air intake duct of evaporator is operated by motor after being compressed to it with piston, to
The refrigerant gas of high temperature and pressure is discharged in exhaust pipe, and power is provided for refrigeration cycle;The high temperature that condenser 8 compresses compressor 6
The refrigerant vapour of high pressure, radiates by extraneous air, and forms high pressure refrigerant liquid;Expansion valve 9 exports condenser 8
High pressure refrigerant liquid throttles into low-temp low-pressure liquid refrigerant;Fan 13 is mounted on 8 back side of condenser, is used for work
Condenser 8 radiates;;And the heater 16 suitable for being heated to coolant liquid in water tank 12.
Coolant liquid enters water tank 12 from water inlet line 151, and the liquid system of evaporator 7 and low-temp low-pressure is flowed under refrigeration mode
Cryogen carries out heat exchange, is cooled down, is then flowed out by outlet conduit 152, cooled down to battery module.It arranges on 12 top of water tank
The gas that air valve 10 is used for being discharged in coolant liquid keeps cooling efficiency.Gasify after liquid refrigerant heat absorption, into compressor 6;Pressure
Contracting machine 6 does work to the refrigerant vapour of the low-temp low-pressure of sucking, so that it is converted into high-temperature high-pressure state, flows to condenser 8;Cold
Refrigerant vapour under 8 high temperature high pressure conditions of condenser carries out heat exchange with cool exterior air, become after condensation highly pressurised liquid into
Enter expansion valve 9;The high pressure refrigerant liquid that expansion valve 9 exports condenser 8 throttles into low-temp low-pressure liquid refrigerant, cocurrent
Enter in evaporator, cooling cycle is carried out to coolant liquid.
Coolant liquid is liquid cooling medium in the present embodiment, is reached with circulating by the temperature of control coolant liquid
Control the purpose of battery module temperature;Heater 16 is mounted on inside water tank, and when temperature is too low, work is for heated cooling fluid;
Inlet and outlet pipe lines 15 are the flow channel of coolant liquid;Control box 17 is the control section of temperature control equipment, can be adjusted default
Temperature and the temperature difference, control temperature control equipment are in standby cycle, heating or refrigeration work state;17 He of box in order to control of harness 14
Electrical connection between other electric components.
In the present embodiment under heating mode, the heater 16 in water tank 12 heats the coolant liquid of inflow, then
It is flowed out via evaporator, battery module is heated.Compressor 6 and expansion valve 9 do not work at this time.
Inlet and outlet water between battery pack temperature control device and battery module accoding to exemplary embodiment as illustrated in FIG. 4
Piping diagram, wherein coolant liquid, which are driven by water pump 11 from the outlet conduit 152 of battery pack temperature control device, to flow out, along blue
Circuit enters the water inlet of battery module, and coolant liquid is flowed out from water outlet along red circuit after the pipeline built in battery module
Summarize the water inlet line 151 into battery pack temperature control device.The one action cycle of coolant liquid is realized with this.
In the present embodiment, the shell 2 of battery pack temperature control device is made of the material of low-density, such as aluminium, fiberglass
Deng to meet lightweight requirements;2 structural strength of shell of battery pack temperature control device and mounting means must satisfy iron simultaneously
The related request of road product;
In the present embodiment, normally opened or normally-closed contact can be selected inside cock, when the flow rate of liquid in pipeline is more than
Inner contact is closed or disconnects when the action specified value of cock, and the liquid flow signals of monitoring are sent out;
In the present embodiment, coolant liquid is that liquid anti-freeze (such as, but not limited to ethylene glycol, glycerine etc.) and distilled water are pressed
The liquid cooling medium that certain proportion is mixed to form, antifreezing agent can be required according to the minimum temperature of product operating ambient temperature into
Row selection.
Embodiment 2
On the basis of embodiment 1, the present embodiment 2 provides a kind of battery pack temperature control system.
Concrete structure about battery pack temperature control device is elaborated in embodiment 1, no longer superfluous herein
It states.
The utility model has the beneficial effects that using lithium battery group temperature control equipment, there is real time monitoring cooling pipe
Temperature, driving coolant liquid cycle, automatically heats coolant liquid after more than set temperature, is freezed, realized to lithium battery
The reliable temperature control of monomer stabilization, solves the heating problem in lithium battery charging, discharge process, lithium battery is greatly improved to height
Temperature, the adaptability of low temperature environment.
On the basis of above-described embodiment, the present embodiment is enlightenment with the above-mentioned desirable embodiment according to the utility model, is led to
Cross above-mentioned description, relevant staff completely can in the range of without departing from this item utility model technological thought, into
Row various changes and amendments.The technical scope of this item utility model is not limited to the contents of the specification, it is necessary to
Its technical scope is determined according to right.
Claims (7)
1. a kind of battery pack temperature control device, which is characterized in that including:
Coolant circulation system (100), is adjusted battery pack temperature suitable for passing through coolant liquid;
Humidity control system (200) is suitable for adjusting coolant liquid into trip temperature.
2. battery pack temperature control device according to claim 1, which is characterized in that
The coolant circulation system (100) includes:
The inlet and outlet pipe lines (15) circulated suitable for coolant liquid;
Suitable for storing the water tank (12) of coolant liquid;
Suitable for driving the water pump (11) of coolant liquid cycle;
Suitable for excluding the air bleeding valve (10) of gas in coolant liquid.
3. battery pack temperature control device according to claim 2, which is characterized in that
The inlet and outlet pipe lines (15) include:
Water inlet line (151) and outlet conduit (152), wherein
Temperature sensor (5) is installed at the water inlet line (151), to detect coolant temperature;And
Cock (3) is installed at the outlet conduit (152) end, to detect coolant flow state.
4. battery pack temperature control device according to claim 1, which is characterized in that
The humidity control system (200) includes:Compressor (6), evaporator (7), condenser (8), expansion valve (9) and heater
(16), wherein
The liquid refrigerant for the low-temp low-pressure that the evaporator (7) is suitable for exporting the expansion valve (9) carries out heat with coolant liquid
It exchanges, gasification heat absorption forms low pressure refrigerant vapor;
The compressor (6) is suitable for sucking the refrigerant vapour of low-temp low-pressure, compressed heel row from the evaporator (7) air intake duct
Go out the refrigerant gas of high temperature and pressure;
The refrigerant gas for the high temperature and pressure that the condenser (8) is suitable for being discharged after compressing the compressor (6), through external empty
Gas radiates, and forms high pressure refrigerant liquid;
The high pressure refrigerant liquid that the expansion valve (9) is suitable for exporting the condenser (8) throttles into low-temp low-pressure liquid system
Cryogen;And
The heater (16) is suitable for heating coolant liquid in water tank (12).
5. according to claim 1-4 any one of them battery pack temperature control devices, which is characterized in that
The battery pack temperature control device further includes:
Liquid level sensor (4) for monitoring water tank (12) internal coolant water level;And
The condenser back side is adapted to mount to carry out cooling fan (13) to condenser.
6. battery pack temperature control device according to claim 5, which is characterized in that
The battery pack temperature control device further includes:Suitable for what is controlled coolant circulation system and humidity control system
External control system (300), wherein
The external control system (300) includes:Control box (17),
The control box (17) is suitable for setting coolant liquid desired temperature value and temperature controls bound;
When coolant temperature is in control range, control box (17) the control water pump (11) works;
When coolant temperature is less than temperature lower control limit, control box (17) the control humidity control system starts heating mould
Formula heats coolant liquid, until reaching set temperature value;
When coolant temperature is higher than temperature upper control limit, control box (17) the control humidity control system starts refrigeration mould
Formula cools down to coolant liquid, until reaching set temperature value.
7. a kind of battery pack temperature control system, which is characterized in that including battery pack temperature as claimed in any one of claims 1 to 6
Spend control device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201721769376.4U CN207834534U (en) | 2017-12-18 | 2017-12-18 | Battery pack temperature control device and battery pack temperature control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201721769376.4U CN207834534U (en) | 2017-12-18 | 2017-12-18 | Battery pack temperature control device and battery pack temperature control system |
Publications (1)
Publication Number | Publication Date |
---|---|
CN207834534U true CN207834534U (en) | 2018-09-07 |
Family
ID=63387998
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201721769376.4U Active CN207834534U (en) | 2017-12-18 | 2017-12-18 | Battery pack temperature control device and battery pack temperature control system |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN207834534U (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112076414A (en) * | 2020-08-12 | 2020-12-15 | 深圳供电局有限公司 | Fire fighting equipment and method for container type energy storage system |
CN112467246A (en) * | 2020-11-25 | 2021-03-09 | 中国第一汽车股份有限公司 | Battery cooling system and battery cooling control method |
CN114473273A (en) * | 2022-03-14 | 2022-05-13 | 二重(德阳)重型装备有限公司 | Liquid cooling support tool for plug-in type connecting pipe and anti-deformation method for reactor core measuring pipe |
-
2017
- 2017-12-18 CN CN201721769376.4U patent/CN207834534U/en active Active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112076414A (en) * | 2020-08-12 | 2020-12-15 | 深圳供电局有限公司 | Fire fighting equipment and method for container type energy storage system |
CN112467246A (en) * | 2020-11-25 | 2021-03-09 | 中国第一汽车股份有限公司 | Battery cooling system and battery cooling control method |
CN114473273A (en) * | 2022-03-14 | 2022-05-13 | 二重(德阳)重型装备有限公司 | Liquid cooling support tool for plug-in type connecting pipe and anti-deformation method for reactor core measuring pipe |
CN114473273B (en) * | 2022-03-14 | 2023-01-20 | 二重(德阳)重型装备有限公司 | Liquid cooling support tool for plug-in type connecting pipe and anti-deformation method for reactor core measuring pipe |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN207834534U (en) | Battery pack temperature control device and battery pack temperature control system | |
CN208352485U (en) | Batteries of electric automobile composite cooling system | |
CN206235051U (en) | A kind of interval cooling liquid cool equipment of double water tank | |
CN203479060U (en) | Temperature-controllable dry and wet-opening and closing integrated type cooling tower system | |
CN209386636U (en) | A kind of amblent air temperature case refrigeration supply circulatory system | |
CN108574076A (en) | A kind of automobile power cell group efficient cooling system | |
CN103496311A (en) | Refrigeration method of LNG refrigerator car and LNG refrigerator car | |
CN206623734U (en) | A kind of liquid nitrogen power output system and hybrid power cold chain transportation car | |
CN106828272A (en) | A kind of cold storage cold chain belt line of pure electric automobile | |
CN206528360U (en) | A kind of charging pile that electrokinetic cell can be freezed | |
CN207099528U (en) | Charging pile cooling system | |
CN2818786Y (en) | Local colling device for coal mine | |
CN219456783U (en) | Concrete temperature control system | |
CN106740403A (en) | A kind of liquid nitrogen power output system and hybrid power cold chain transportation car | |
CN206475796U (en) | A kind of agricultural product controlled atmosphere transportation management system | |
WO2023134179A1 (en) | Extended-range electric vehicle and control method thereof | |
CN106766546A (en) | A kind of dual system circulating water cooling device | |
CN100453771C (en) | Mining partial cold-supply device | |
CN103182978B (en) | A kind of Novel ice-storage airplane air conditioner vehicle | |
CN106684723A (en) | Automatic control cooling energy-saving transformer substation | |
CN207276361U (en) | A kind of closed cooling water system of reactive-load compensation generating means | |
CN205298096U (en) | Natural gas filling station's closed loop hydraulic compressor arrangement | |
CN114279011A (en) | Ice slurry/chilled water binary vacuum cold accumulation air conditioning device | |
CN210267790U (en) | Independent refrigerating system | |
CN203036257U (en) | Compressed natural gas decompression device based on cooling capacity recovery |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant |