CN108493522B - A kind of temperature adjusting method of liquid metal cell in stored energy application - Google Patents
A kind of temperature adjusting method of liquid metal cell in stored energy application Download PDFInfo
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- CN108493522B CN108493522B CN201810231428.5A CN201810231428A CN108493522B CN 108493522 B CN108493522 B CN 108493522B CN 201810231428 A CN201810231428 A CN 201810231428A CN 108493522 B CN108493522 B CN 108493522B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
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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
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Abstract
The invention belongs to liquid metal cells in scale power storage field, and disclose a kind of liquid metal cell in stored energy application under Suspend Mode, reduce the temperature adjusting method that battery capacity decays and reduces energy consumption by reducing stack temperature.This method comprises: (a) obtains its Current Temperatures using the temperature of temperature testing equipment detection liquid metal cell；(b) Current Temperatures of liquid metal cell are reduced and real-time monitoring is carried out to the Current Temperatures, so that electrode and electrolyte by liquid phase are colloidal state or solid phase in liquid metal cell, to reduce the solubility of electrode in the electrolyte, and then reduce the energy consumption of liquid metal cell；(c) when current running temperature is down to 25 DEG C between operation operating temperature range, stop reducing the current running temperature, while maintaining the final temperature of liquid metal cell running temperature in this prior.Through the invention, it reduces liquid metal cell battery capacity under Suspend Mode to decay, reduces additional electrical energy loss.
Description
Technical field
The invention belongs to liquid metal cells in scale power storage field, more particularly, to a kind of liquid metal electricity
Temperature adjusting method of the pond in stored energy application.
Background technique
Scale power storage is efficiently to utilize the Pinch technology and traditional power grid of renewable energy, construction smart grid
It is difficult to the important support technology in the electric car from far-off regions covered charging relaying power station.Energy-storage battery is the electric energy for having much potentiality
Memory technology, but limited by critical material and technology, existing battery system can not be in the characteristics such as cost, service life and safety
Meet the requirement of scale energy storage.
Liquid metal cell be developed recently get up the completely new low cost of one kind, large capacity, high safety energy-storage battery
Technology has broad application prospects in scale power storage field.Application of the liquid metal cell in scale power storage,
Generated output of renewable energy source fluctuation can be effectively stabilized, wind power plant electric power quality is improved and power grid receives the ability of wind-powered electricity generation, together
When have the effect of Load Regulation and peak load shifting during grid power transmission.The cathode of liquid metal cell is generally common
Alkali metal (lithium, sodium etc.) and alkaline-earth metal (magnesium, calcium etc.), just extremely the metal or alloys such as tin, antimony, lead and bismuth, electrolyte are
The inorganic salts such as sodium chloride, magnesium chloride and lithium chloride.The electromotive force of battery is poor from the electrode potential of different metal, by positive and negative
The alloying and removal alloying process of pole metal realize the mutual conversion of chemical energy and electric energy, to realize scale electric power energy
Storage and release.The battery is transported for (300 DEG C~700 DEG C, depending on Different electrodes/electrolyte material system) under the high temperature conditions
Row, positive and negative anodes are all made of liquid metal, and electrolyte is inorganic fused salt, since liquid metal is immiscible with inorganic fused salt, three layers
Liquid AUTOMATIC ZONING according to density contrast constitutes full liquid state batteries structure.Intermediate molten salt layer also serves as the separation layer between positive and negative anodes,
So that liquid metal cell has abandoned traditional battery diaphragm.Operational mode of the battery in smart grid includes electric discharge
Mode, charge mode and Suspend Mode.Under these three operational modes, since cell operating temperature is higher, positive and negative pole material and
Electrolyte is molten condition, so that electrode material has certain solubility in electrolyte fused salt, therefore battery has oneself and puts
The capacity of electrical phenomena, battery can gradually decay.Meanwhile in battery energy storage application process, due to maintaining higher operating temperature,
If battery continuation maintains the temperature under Suspend Mode, biggish power consumption will cause, so as to cause the energy dose-effect of battery pack
Rate reduces.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of liquid metal cells answers in energy storage
Thus temperature adjusting method in is solved by the monitoring and regulation to the liquid metal cell temperature under Suspend Mode
Reduce the technical issues of liquid metal cell battery capacity under Suspend Mode decays with additional electrical energy loss.
To achieve the above object, it is proposed, according to the invention, provide a kind of temperature tune of liquid metal cell in stored energy application
Prosecutor method, which is characterized in that this method is suitable for liquid metal cell and is under Suspend Mode, specifically includes the following steps:
(a) detection is carried out to the temperature of the liquid metal cell and obtains its Current Temperatures；
(b) Current Temperatures of the liquid metal cell are reduced and real-time monitoring is carried out to the Current Temperatures；
(c) when the Current Temperatures are down to operation operating temperature range or less, using the Current Temperatures as the liquid
The final temperature of metal battery simultaneously remains unchanged, at this point, electrode and electrolyte are by liquid phase in the liquid metal cell
For colloidal state or solid phase, solubility of the electrode in the electrolyte is reduced, so that the energy of the liquid metal cell
Consumption reduces.
It is further preferred that the operation operating temperature range is preferably 300 DEG C~700 DEG C in step (c).
It is further preferred that the mode of the Current Temperatures for reducing the liquid metal cell is preferred in step (b)
Using the method for Temperature fall, this method is the liquid metal cell under no power state of operation, passes through cross-ventilation band
The mode for walking heat realizes Temperature fall.
It is further preferred that the mode of the Current Temperatures for reducing the liquid metal cell is preferred in step (b)
Using the method for slow cooling, this method is that the liquid metal cell is heated while being cooled down by cross-ventilation,
To realize slow cooling.
It is further preferred that the mode of the Current Temperatures for reducing the liquid metal cell is preferred in step (b)
Using the method for fast cooling, this method is the liquid metal cell under no power state of operation, is cooled down using electric equipment
Or the mode of Physical temperature-lowering cools down to the environment temperature of the liquid metal cell, to reduce the liquid metal cell
Temperature and realize fast cooling.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
1, the present invention is by the way that the temperature of the battery under Suspend Mode to be down between 25 DEG C~operation operating temperature range, electricity
It solves matter and anode is in colloidal state or solid phase, efficiently solve battery due to the problem of self discharge leads to capacity attenuation and additional electric
The problem of capable of being lost；
2, the present invention is different from the high temperature energy-storage battery such as sodium-sulphur battery, is the liquid metal cell based on the design of full liquid
It is resistant to the variation of temperature, and is proposed in the case where liquid metal cell is in Suspend Mode, the self-discharge rate of battery is reduced, mentions
The battery alternating temperature regulation and administration technology of high energy-storage system efficiency；
3, the present invention provides a kind of methods for reducing liquid metal cell temperature, so that having charged in liquid metal cell
Cheng Hou, and cannot effectively inhibit battery under Suspend Mode, since self discharge leads to electricity immediately in the case where grid power transmission
The phenomenon that tankage is decayed, simultaneously as temperature of the battery under static condition is reduced, so that heating maintains battery temperature
Additional electrical energy loss reduces.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of liquid metal cell group constructed by preferred embodiment according to the invention；
Fig. 2 is liquid metal cell group temperature change schematic diagram constructed by preferred embodiment according to the invention；
Fig. 3 is liquid metal cell monomer capacity attenuation schematic diagram constructed by preferred embodiment according to the invention；
Fig. 4 is 500 DEG C of electric energy loss schematic diagrames of constant temperature constructed by preferred embodiment according to the invention；
Fig. 5 is that 400 DEG C of electric energy loss schematic diagrames are naturally cooling to constructed by preferred embodiment according to the invention；
Fig. 6 is slow cooling constructed by preferred embodiment according to the invention to 400 DEG C of electric energy loss schematic diagrames；
Fig. 7 is fast cooling constructed by preferred embodiment according to the invention to 400 DEG C of electric energy loss schematic diagrames.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
It is different from the high temperature energy-storage battery such as sodium-sulphur battery, the liquid metal cell based on the design of full liquid is resistant to temperature
Variation.Since the running temperature of battery is higher, electrode and electrolyte are all molten condition, and electrode material is melting
Have certain solubility in electrolyte, will lead to the capacity attenuation of battery, if while battery continue to battery under Suspend Mode
Running temperature can not balancing battery system since battery does not generate under Suspend Mode Joule heat, polarization heat, reaction heat
Externally heat dissipation, it is therefore desirable to consume additional electric energy to maintain the running temperature of battery.
Based on above-mentioned characteristic, the invention proposes one kind in the case where liquid metal cell is in Suspend Mode, in order to reduce electricity
The self-discharge rate in pond improves the battery alternating temperature regulation and administration technology of energy-storage system efficiency.Its main technical method is to hang up
Under mode, stack temperature is reduced, the electrode of battery and electrolyte is made to become colloidal state or solid phase from liquid phase after cooling, thus
Electrode material solubility in the electrolyte is reduced, pile energy consumption is reduced, the temperature control after cooling is normal in 25 DEG C~battery
It runs in operating temperature range, the common normal operation operating temperature range of liquid metal cell is between 300 DEG C~700 DEG C.
A kind of self discharge for reducing battery by cooling is provided when battery pack is under Suspend Mode, reduces pile energy consumption
Method, which includes (by taking battery temperature is finally down to 400 DEG C as an example, the running temperature of battery is 500 DEG C):
1. Temperature fall: being sent and instructed to temperature controller by battery management system (BMS), opened inactivity and run shape
State makes the battery in battery assembly module by way of to the heat dissipation of external natural convection air, reduces the temperature of battery.Work as battery
When mean temperature is down to 400 DEG C in group, temperature signal is sent to battery management system by hygrosensor, then by battery management
System sends to temperature controller and instructs, and opens heating mode, battery pack mean temperature is made to maintain 400 DEG C；
2. slow cooling: being sent and instructed to temperature controller by battery management system (BMS), open the small function of heating equipment
Rate maintains operating status, and (its power is less than the heat radiation power of battery pack, and specific power is by the cooling needed under different operating conditions
Rate determines), pass through battery in battery assembly module to the heat dissipation of external natural convection air and small-power thermal compensation
Mode slowly reduces the temperature of battery.When mean temperature is down to 400 DEG C in battery pack, by hygrosensor to cell tube
Reason system sends temperature signal, then sends and instruct from battery management system to temperature controller, opens heating mode, makes battery pack
Mean temperature maintains 400 DEG C；
3. fast cooling: being sent and instructed to temperature controller by battery management system (BMS), opened inactivity and run shape
State, i.e. heating equipment are not run, while battery management system (BMS) sends to refrigeration equipment and instructs, and open cooling operating status
(its power is greater than the heat radiation power of battery pack, and specific power is determined by the rate of temperature fall needed under different operating conditions) makes electricity
Battery in the group unit of pond faster reduces the temperature of battery in such a way that refrigeration equipment forced convertion is radiated.Work as battery pack
When interior mean temperature is down to 400 DEG C, temperature signal is sent to battery management system by hygrosensor, then by battery management system
It unites to send to temperature controller and instruct, open heating mode, while battery management system (BMS) sends to cooling system and instructs,
Cooling operating status is closed, battery pack mean temperature is made to maintain 400 DEG C.
It should be noted that above temperature adjusting method is come so that battery is cooled to 400 DEG C under Suspend Mode as an example
The explanation of temperature regulation is carried out, above temperature adjusting method is equally applicable in 25 DEG C~normal battery operation temperature range.
Since liquid state batteries are in the power storage of different scales, the size of battery capacity, thermal insulation property, working environment, operation
Condition is not quite similar, thus in above-described temperature adjusting method, heated constant temperature power, cooling compensation power, cooling
Equipment operation power is also not quite similar, therefore does not provide specific value.Explanation is needed further exist for, in the temperature of fast cooling
In degree regulation, refrigeration equipment can be electrical equipment cooling refrigeration (such as electric fan, air-conditioning etc.), be also possible to Physical temperature-lowering equipment
Such as cryogenic liquid gas (such as liquid nitrogen) or other cryogenic materials, because no matter principle of which kind of cooling system its cooling is one
What is caused is all the temperature that battery in battery pile is reduced by the environment temperature of heat radiator or reduction battery pack.
Specific implementation case of the invention is implemented in the case where battery pack is in Suspend Mode, is 23Ah's with monomer capacity
Li | | Sn-Sb liquid metal cell is objective for implementation, and normal battery operation temperature is at 500 DEG C.Fig. 1 is according to the invention excellent
The structural schematic diagram of liquid metal cell group constructed by embodiment is selected, as shown in Figure 1, battery case is by 320 single battery strings
Connection is constituted, and leads to that entire battery case is non-serviceable to be happened to avoid some battery from breaking down, scheme is using grouping
The method of fling-cut switch, with 16 batteries for one group.The arrangement of battery in battery case: these batteries are divided into vertical direction
5 layers, each layer of number of batteries is 64 (8W × 8L), is divided into 10mm between battery and battery in the horizontal direction.Battery case selection
Low thermal conductivity material and technology such as vacuum insulation heat-insulating technique, this time in embodiment battery case thermal insulation material with a thickness of
100mm, thermal coefficient 0.023Wm-1K-1.Infilling work is husky in the case, has not only increased the thermal coefficient in battery case, but also can be with
Play the role of fireproof.Heating device, cooling device are provided in the battery case.The battery case connects battery management system
(BMS), pass through the voltage of the system monitoring battery cell, temperature, estimation battery charge state, the abnormal electricity of discovery charging in time
Pond monomer, and complete battery protection movement.Setting of the temperature controller according to battery management system, control heating temperature-fall period, guarantee
Liquid state batteries work within a reasonable temperature range.
Reduce with three kinds of temperature adjusting methods the temperature under battery pack Suspend Modes in the present invention, make its control 25 DEG C~
In 500 DEG C.Since the range of its cooling is very long, it is impossible to correspond out the corresponding three kinds of regulation methods of each temperature
Come.The fusing point of the anode, cathode and electrolyte distinguishes 450 DEG C, 180 DEG C, 430 DEG C, it is known that battery is being cooled to 400
DEG C, electrolyte and anode are in colloidal state or solid phase.Therefore in the present embodiment, selective analysis battery pack is under the Suspend Mode
100 hours are stood, during the temperature regulation by these three modes is cooled to 400 DEG C, the capacity attenuation and volume of battery
Outer electric energy loss.
In order to illustrate more clearly of the purpose of the present invention, technical solution and advantage, in conjunction with specific implementation case, and referring to attached
Figure, the present invention is described in further detail.
Specific embodiment one:
Battery makes battery be cooled to 400 DEG C under Suspend Mode, with the temperature adjusting method of Temperature fall, concrete operations
Steps are as follows:
It is instructed 1. being sent by battery management system (BMS) to temperature controller, opens no power state of operation, make battery
Battery in group unit reduces the temperature of battery by way of to the heat dissipation of external natural convection air.
2. sending temperature to battery management system by hygrosensor when mean temperature is down to 400 DEG C in battery pack
Signal.
It is instructed 3. being sent from battery management system to temperature controller, opens heating mode, in the implementation case, heating
Power selection 1000W is kept the temperature, so that battery pack mean temperature be made to maintain 400 DEG C.
Fig. 2 is liquid metal cell group temperature change schematic diagram, such as Fig. 2 constructed by preferred embodiment according to the invention
It is shown, when battery pack is under Suspend Mode, cool to battery pack from 500 DEG C of normal working temperature
Time used is 65 hours in 400 DEG C, and in 35 hours time of repose later, incubator heating equipment is with the power of 1000W
Maintain battery pack temperature at 400 DEG C.Battery pack temperature from 500 DEG C cool to 400 DEG C used in the time it is longer, mainly due to electricity
Pond case has used preferable thermal insulation material.The rated capacity of battery cell is 23Ah, before standing, battery through overcharge,
Battery capacity is 22.8Ah.In this embodiment, during battery makes battery be cooled to 400 DEG C in a manner of Temperature fall,
As shown in figure 3, decaying occurs for the capacity of battery comparatively fast in the initial stage of cooling, with the reduction capacity attenuation of time and temperature
Rate reduce, by 100 hours time of repose, battery capacity was reduced to 22.54Ah from incipient 22.8Ah, under capacity
0.36Ah drops.As shown in figure 5, battery pack during being naturally cooling to 400 DEG C, is run since heating equipment is in inactivity
State, so during this period of time battery pack does not have electric energy loss to heat, in temperature up to after 400 DEG C, by battery management system
It unites to send to temperature controller and instruct, open heating mode, in the implementation case, heating and thermal insulation power selection 1000W, thus
Battery pack mean temperature is set to maintain 400 DEG C, during this period, it is 8KWh that the electric energy of temperature consumption is maintained by heating equipment.
As shown in figure 3, battery at 500 DEG C of constant temperature, stands 100 hours, battery capacity is reduced to from incipient 22.8Ah
22.14Ah, capacity decline 0.66Ah.As shown in figure 4, battery pack at 500 DEG C of constant temperature, stands 100 hours, heating and thermal insulation power
1000W is selected to maintain temperature, during this period, it is 26KWh that the electric energy of temperature consumption is maintained by heating equipment.Identical quiet
It sets under the time, compared with 500 DEG C of battery pack constant temperature, battery pack is naturally cooling to 400 DEG C, when capacity attenuation is than 500 DEG C of constant temperature
Small 0.3Ah, small 18KWh when electric energy loss is than 500 DEG C of constant temperature.
Specific embodiment two:
Battery makes battery be cooled to 400 DEG C under Suspend Mode, with the temperature adjusting method of slow cooling, concrete operations
Steps are as follows:
It is instructed 1. being sent by battery management system (BMS) to temperature controller, opens small-power and maintain operating status (its
Power is less than the heat radiation power of battery pack, and specific power is determined by the rate of temperature fall needed under different operating conditions, in this reality
Apply its in example and compensate power selection 40W), pass through the battery in battery assembly module to the heat dissipation of external natural convection air and small function
The mode of rate thermal compensation slowly reduces the temperature of battery.
2. sending temperature to battery management system by hygrosensor when mean temperature is down to 400 DEG C in battery pack
Signal.
It is instructed 3. being sent from battery management system to temperature controller, opens heating mode, tie up battery pack mean temperature
It holds at 400 DEG C
Shown in Fig. 2, when battery pack is under Suspend Mode, make battery pack from normal working temperature in a manner of slow cooling
It is 78 hours that 500 DEG C, which cool to time used in 400 DEG C, in 22 hours time of repose later, incubator heating equipment with
The power of 1000W maintains battery pack temperature at 400 DEG C.Battery pack temperature from 500 DEG C cool to 400 DEG C used in the time than naturally drop
Time used in warm mode is long, mainly due to having used preferable thermal insulation material to battery case and having opened power compensation slow cooling
Mode.The rated capacity of battery cell is 23Ah, and before standing, battery is through overcharge, battery capacity 22.8Ah.At this
In embodiment, during battery makes battery be cooled to 400 DEG C in a manner of slow cooling, as shown in figure 3, the capacity of battery exists
Decaying occurs for the initial stage of cooling comparatively fast, as the rate of time and the reduction capacity attenuation of temperature reduce, by 100 hours
Time of repose, battery capacity is reduced to 22.44Ah from incipient 22.8Ah, and capacity declines 0.46Ah.As shown in fig. 6, electric
Pond group is during slow cooling is to 400 DEG C, since heating equipment is in small power backoffs operating status, so at this section
Interior battery pack has electric energy loss to heat, and in temperature up to after 400 DEG C, is referred to from battery management system to temperature controller transmission
It enables, opens heating mode, in the implementation case, heating and thermal insulation power selection 1000W, so that battery pack mean temperature be made to maintain
At 400 DEG C, during entire stand, it is 7.3KWh that the electric energy of temperature consumption is maintained by heating equipment.As shown in figure 3, battery
At 500 DEG C of constant temperature, 100 hours are stood, battery capacity is reduced to 22.14Ah, capacity decline from incipient 22.8Ah
0.66Ah.As shown in figure 4, battery pack at 500 DEG C of constant temperature, stands 100 hours, heating and thermal insulation power selection 1000W maintains temperature
Degree, during this period, it is 26KWh that the electric energy of temperature consumption is maintained by heating equipment.Under identical time of repose, with battery
500 DEG C of constant temperature of group is compared, and battery pack slow cooling is to 400 DEG C, small 0.2Ah when capacity attenuation is than 500 DEG C of constant temperature, electric energy damage
Small 18.7KWh at 500 DEG C of loss-rate constant temperature.
Specific embodiment three:
Battery makes battery be cooled to 400 DEG C under Suspend Mode, with the temperature adjusting method of fast cooling, concrete operations
Steps are as follows:
It is instructed 1. being sent by battery management system (BMS) to temperature controller, opens no power state of operation.
2. battery management system (BMS) sends to refrigeration equipment and instructs, opening cooling operating status, (its power is greater than battery
The heat radiation power of group, specific power are determined that it cools down in the present embodiment by the rate of temperature fall needed under different operating conditions
Plant capacity selects 400W) make the battery in battery assembly module in such a way that forced convertion is radiated, faster reduce battery
Temperature.
3. sending temperature to battery management system by hygrosensor when mean temperature is down to 400 DEG C in battery pack
Signal.It is instructed 4. being sent from battery management system to temperature controller, opens heating mode, while battery management system (BMS)
It sends and instructs to cooling system, close cooling operating status, battery pack mean temperature is made to maintain 400 DEG C.
Shown in Fig. 2, when battery pack is under Suspend Mode, make battery pack from normal working temperature in a manner of fast cooling
It is 38 hours that 500 DEG C, which cool to time used in 400 DEG C, in 62 hours time of repose later, incubator heating equipment with
The power of 1000W maintains battery pack temperature at 400 DEG C.Battery pack temperature from 500 DEG C cool to 400 DEG C used in the time than naturally drop
Time used in warm mode is short, mainly opens cooling system.The rated capacity of battery cell is 23Ah, before standing, electricity
Pond is through overcharge, battery capacity 22.8Ah.In this embodiment, battery is cooled to battery in a manner of fast cooling
During 400 DEG C, Fig. 3 is the signal of liquid metal cell monomer capacity attenuation constructed by preferred embodiment according to the invention
Figure, as shown in figure 3, decaying occurs for the capacity of battery comparatively fast in the initial stage of cooling, with the reduction capacity of time and temperature
The rate of decaying reduces, and by 100 hours time of repose, battery capacity was reduced to 22.65Ah from incipient 22.8Ah, holds
Amount decline 0.25Ah.Fig. 7 is that fast cooling constructed by preferred embodiment according to the invention to 400 DEG C of electric energy losses are illustrated
Figure, as shown in fig. 7, battery pack is during fast cooling is to 400 DEG C, although heating equipment is in no power state of operation,
But refrigeration equipment is opened, so during this period of time battery pack still has electric energy loss use, in temperature up to after 400 DEG C, by electricity
Pond management system sends to temperature controller and instructs, and opens heating mode and closes refrigeration equipment, in the implementation case, heating
Heat preservation power selection 1000W during this period, is maintained so that battery pack mean temperature be made to maintain 400 DEG C by heating equipment
The electric energy of temperature consumption is 35.3KWh.As shown in figure 3, battery is at 500 DEG C of constant temperature, 100 hours are stood, battery capacity is from rigid
The 22.8Ah of beginning is reduced to 22.14Ah, and capacity declines 0.66Ah.As shown in figure 4, battery pack at 500 DEG C of constant temperature, is stood
100 hours, heating and thermal insulation power selection 1000W maintained temperature, during this period, the electricity of temperature consumption was maintained by heating equipment
It can be 26KWh.Under identical time of repose, compared with 500 DEG C of battery pack constant temperature, battery pack fast cooling holds to 400 DEG C
Small 0.41Ah, big 9.3KWh when electric energy loss is than 500 DEG C of constant temperature at 500 DEG C of attenuation ratio constant temperature of amount.
In conclusion temperature adjusting method of the present invention about liquid metal cell scale energy storage, is in battery and hangs up
Under mode, by the method for three kinds of cooling regulations, the problem of battery leads to capacity attenuation due to self discharge is all efficiently solved.It is logical
Comparison is crossed, fast cooling can make the capacity retention ratio highest of battery, but fast cooling will cause additional electrical energy loss more
Greatly.The regulation method of slow cooling compared to Temperature fall and fast cooling, capacity retention ratio is minimum, but its electric energy damage
Consumption is minimum.The regulation method of Temperature fall is compared to slow cooling and fast cooling, and capacity retention ratio is placed in the middle, electric energy loss
Also placed in the middle, but the mode very close to slow cooling is lost.The three kinds of above cooling methods all can operate with liquid state batteries energy storage,
But most suitable cooling method is selected according to different operating condition and needs.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (5)
1. a kind of temperature adjusting method of liquid metal cell in stored energy application, which is characterized in that this method is suitable for liquid
Metal battery is under Suspend Mode, specifically includes the following steps:
(a) detection is carried out to the temperature of the liquid metal cell and obtains its Current Temperatures；
(b) Current Temperatures of the liquid metal cell are reduced and real-time monitoring is carried out to the Current Temperatures；
(c) when the Current Temperatures are down to operation operating temperature range or less, using the Current Temperatures as the liquid metal
The final temperature of battery simultaneously remains unchanged, at this point, electrode and electrolyte by liquid phase are glue in the liquid metal cell
State or solid phase, solubility of the electrode in the electrolyte reduces, so that the energy consumption of the liquid metal cell drops
It is low.
2. temperature adjusting method as described in claim 1, which is characterized in that in step (c), the operation operating temperature model
Enclose is 300 DEG C~700 DEG C.
3. temperature adjusting method as claimed in claim 1 or 2, which is characterized in that described to reduce the liquid in step (b)
The method that the mode of the Current Temperatures of state metal battery uses Temperature fall, this method is the liquid metal cell in inactivity
Under operating status, Temperature fall is realized in such a way that cross-ventilation takes away heat.
4. temperature adjusting method as claimed in claim 1 or 2, which is characterized in that described to reduce the liquid in step (b)
The method that the mode of the Current Temperatures of state metal battery uses slow cooling, this method is that the liquid metal cell is passing through sky
It is heated while gas convective cooling, to realize slow cooling.
5. temperature adjusting method as claimed in claim 1 or 2, which is characterized in that described to reduce the liquid in step (b)
The method that the mode of the Current Temperatures of state metal battery uses fast cooling, this method is the liquid metal cell in inactivity
Under operating status, the environment temperature of the liquid metal cell is dropped by the way of electric equipment cooling or Physical temperature-lowering
Temperature, to reduce the temperature of the liquid metal cell and realize fast cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810231428.5A CN108493522B (en) | 2018-03-20 | 2018-03-20 | A kind of temperature adjusting method of liquid metal cell in stored energy application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810231428.5A CN108493522B (en) | 2018-03-20 | 2018-03-20 | A kind of temperature adjusting method of liquid metal cell in stored energy application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108493522A CN108493522A (en) | 2018-09-04 |
| CN108493522B true CN108493522B (en) | 2019-11-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022231812A1 (en) * | 2021-04-30 | 2022-11-03 | Microsoft Technology Licensing, Llc | Integrated energy storage system including a thermal energy storage coupled with a liquid metal battery storage and a cryogenic energy storage |
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| CN112054592B (en) * | 2020-08-20 | 2022-03-29 | 国网浙江省电力有限公司嘉兴供电公司 | Dynamic capacity-to-load ratio adjusting system |
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| US9312522B2 (en) * | 2012-10-18 | 2016-04-12 | Ambri Inc. | Electrochemical energy storage devices |
| CN104701587B (en) * | 2015-02-10 | 2017-11-03 | 智慧城市系统服务（中国）有限公司 | A kind of radiating device of battery pack and the battery modules using the heat abstractor |
| CN105406148B (en) * | 2015-12-16 | 2018-06-26 | 东莞新能德科技有限公司 | Battery and battery pack with radiating component |
| CN107579310A (en) * | 2017-09-26 | 2018-01-12 | 湖南威威胜新能源技术有限公司 | A kind of liquid metal cell incubator and its heat dissipating method with wind-cooling heat dissipating mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022231812A1 (en) * | 2021-04-30 | 2022-11-03 | Microsoft Technology Licensing, Llc | Integrated energy storage system including a thermal energy storage coupled with a liquid metal battery storage and a cryogenic energy storage |
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