CN106099221B - A kind of all solid state energy storage and reforming unit of semiconductor heat electric control temperature - Google Patents
A kind of all solid state energy storage and reforming unit of semiconductor heat electric control temperature Download PDFInfo
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- CN106099221B CN106099221B CN201610519670.3A CN201610519670A CN106099221B CN 106099221 B CN106099221 B CN 106099221B CN 201610519670 A CN201610519670 A CN 201610519670A CN 106099221 B CN106099221 B CN 106099221B
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- solid lithium
- lithium base
- base battery
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- battery
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- 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
-
- 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
-
- 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
- H01M10/635—Control systems based on ambient temperature
-
- 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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
A kind of all solid state energy storage and reforming unit of semiconductor heat electric control temperature, comprising: all solid lithium base battery group (1), semiconductor thermoelectric conversion system (3) etc.；Temperature sensor (5) are distributed on each monomer all solid lithium base battery, DC power supply (11) is connected with thermoelectric pile (7) in battery management system (4), and temperature sensor (5) is connect with battery management system (4)；Semiconductor thermoelectric conversion system (3) is mounted on all solid lithium base battery group (1) two sides and is adjacent to all solid lithium base battery group (1)；All solid lithium base battery group (1), semiconductor thermoelectric conversion system (3), battery management system (4), temperature sensor (5) are mounted in battery case (2).The present invention overcomes the deficiencies of security risk of commercial Li-ion batteries technology, the high internal resistance and low specific energy of existing all solid lithium base battery technology, meets high safety, big specific energy, the power demand of long-life.
Description
Technical field
The present invention relates to a kind of energy storage and reforming units.
Background technique
For high-energy and the big necessary energy storage demand of high safety two, the researcher of various countries is just actively being researched and developed all solid state
Lithium ion battery or solid lithium battery (all solid lithium base battery), in particular with inorganic solid electrolyte material completely not
Combustibility thoroughly solves the security risk of battery.With conventional liquid electrolyte phase ratio, inorganic solid electrolyte has excellent scarce
Point is as shown in table 1 below.
The advantage of 1 inorganic solid electrolyte of table comparison conventional liquid electrolyte
Currently, the application of all solid lithium base battery needs to solve the problems, such as some science and technologies, raising solid is specifically included that
The lithium ion conducting rate of electrolyte；Reduce the ion transport resistance between electrolyte phase and electrode phase interface.Studies have shown that mentioning
High all solid lithium base battery running temperature (such as 60 DEG C or more), can reduce the internal resistance of cell of all solid lithium base battery, and electric discharge is held
Amount obviously increases, with real practical value.Unlike other electrochemical energy storage systems, such as nickel-metal hydride battery and lithium-ion electric
Pond etc., the reaction heat of charge and discharge association are not easy to shed, work long hours in thermal environment, will shorten battery, drop
Low battery performance, or even the life security for causing thermal runaway and battery failures directly to threaten personnel.
Summary of the invention
Technical problem solved by the present invention is overcome the deficiencies in the prior art, the invention discloses a kind of semiconductor thermoelectrics
The all solid state energy storage and reforming unit of temperature control overcome the security risk of commercial Li-ion batteries technology, existing all solid lithium
The deficiencies of high internal resistance and low specific energy of base battery technology, meets high safety, big specific energy, the power demand of long-life, and right
The additional functionality that component outside energy storage and reforming unit is cooled down or heated up.
The technical solution of the invention is as follows: a kind of all solid state energy storage and reforming unit of semiconductor heat electric control temperature,
It include: all solid lithium base battery group, battery case, semiconductor thermoelectric conversion system, battery management system, temperature sensor；Quan Gu
State lithium-base battery group includes m monomer all solid lithium base battery, wherein m is positive integer, is divided on each monomer all solid lithium base battery
It is furnished with temperature sensor；Semiconductor thermoelectric conversion system includes thermoelectric pile, fan, substrate；Substrate is separately mounted to thermoelectric pile two
Fan is installed in side, the side not contacted with thermoelectric pile on substrate respectively；Battery management system includes DC power supply, temperature detection
Module；DC power supply is connected with thermoelectric pile, and temperature detecting module controls direct current according to the temperature data that each temperature sensor is sent
The forward current direction of power supply；Semiconductor thermoelectric conversion system is mounted on all solid lithium base battery group two sides and is adjacent to all solid lithium
Base battery group；All solid lithium base battery group, semiconductor thermoelectric conversion system, battery management system, temperature sensor are mounted on electricity
In the case of pond.
The thermoelectric pile includes N-type semiconductor, P-type semiconductor, metallic conductor；N-type semiconductor and P-type semiconductor pass through gold
Belong to conductor series connection and form galvanic couple pair, n galvanic couple connects to form thermoelectric pile to by metallic conductor, wherein n is positive integer；Metal
Conductor is fixed on substrate.
The control law in temperature detecting module control DC power supply forward current direction are as follows: when any one temperature sensing
When the collected temperature of device is lower than the minimum of the monomer all solid lithium base battery normal working temperature range of setting, semiconductor heat
Electrotransformation system is adjacent to the forward current on the substrate of all solid lithium base battery group side in metallic conductor and flows to from P-type semiconductor
N-type semiconductor；When the collected temperature of any one temperature sensor is higher than the normal work of monomer all solid lithium base battery of setting
When making the peak of temperature range, semiconductor thermoelectric conversion system is adjacent to metal on the substrate of all solid lithium base battery group side and leads
Intracorporal forward current flows to P-type semiconductor from N-type semiconductor.
The normal working temperature range of the monomer all solid lithium base battery set is 60 DEG C~200 DEG C.
The all solid lithium base battery group has i, there is air duct between each all solid lithium base battery group, on substrate with all solid lithium
The fan that base battery group is adjacent to side installation is corresponding with air duct, wherein i is positive integer.The baseplate material is ceramics.
The positive active material of the monomer all solid lithium base battery is LiCoO2、LiNiO2、LiMn2O4、LiFePO4、
LiCoPO4、Li(NiCoMn)O2、Li(NiCoAl)O2、Li2S、FeS、NiS、TiS2Middle a kind of or combination.The monomer is all solid state
The negative electrode active material of lithium-base battery is Li, Li based alloy, carbon material, Si based alloy, Sn based alloy, Ti based alloy, Li2O、
SiO2、SiO、SnO2、TiO2Middle a kind of or combination.The electrolyte of the monomer all solid lithium base battery be Perovskite,
NASICON、LISICON、Garnet、LiPON、Li3N、Li4SiO4、Li3BO3、β-Al2O3、β”-Al2O3、Li3PO4, in sulfide
A kind of or combination.
The advantages of the present invention over the prior art are that:
(1) present invention connects semiconductor thermoelectric conversion system on the cabinet of all solid lithium base battery group, is coupled all solid state
The wide-temperature applicability of lithium-base battery and the heat-production functions of semiconductor can be substantially reduced the internal resistance of cell and energy loss, improve
The specific energy and charge-discharge cycle of battery are provided than energy, persistent electric energy greatly for supplies such as space device, electric cars
It ensures.
(2) energy storage of the invention may be implemented to make with reforming unit by changing DC current or voltage therein
The advantages that cold, heating and control temperature rate；Based on light weight, size is small, movement-less part, noiseless, high reliablity,
And the advantages that refrigeration and heating effect can be achieved at the same time, the present invention use semiconductor thermoelectric reforming unit heating all solid lithium base electricity
Pond, and battery temperature is kept to be within the scope of desired operating temperatures, enable continuous reliable, safe flexible, efficiently controllable
It is powered.
(3) present invention is based on inorganic in battery pack using all solid lithium base battery of semiconductor heat power technology auxiliary heating
The use of solid electrolyte, avoid commercial liquid electrolyte can the hidden danger such as spontaneous combustion, leakage, explosion, compare energy greatly providing
While electricity output, thoroughly solves the safety problem of energy-storage battery, especially inorganic full-solid lithium-base battery excludes to produce completely
Angry body or the possibility of spontaneous combustion, so that power supply has high safety reliably and good electrochemical stability.
(4) energy storage and conversion proposed by the present invention based on all solid lithium base battery and semiconductor thermoelectric transformation technology
Device is that the supply electric energy such as spacecraft, aviation movement, pure electric automobile, hybrid vehicle and large and medium-sized electric tool needs
While asking, the function that component and space outside to device cool down may be implemented；And battery management in the device
Under intelligent control, using the double-direction control strategy of semiconductor refrigerating and heating, it can cool down or component and sky outside heating system
Between environment, especially by adjustment semiconductor thermoelectric conversion system direct current power source voltage size so that the temperature in battery pack
Spending has continuously adjustable ability.
Detailed description of the invention
Fig. 1 is all solid state energy storage of semiconductor heat electric control temperature of the present invention and the structural schematic diagram of reforming unit.
Fig. 2 is semiconductor thermoelectric conversion system structure schematic diagram of the present invention.
Specific embodiment
As shown in Figure 1, all solid state energy storage and reforming unit of a kind of semiconductor heat electric control temperature, are a kind of based on complete solid
The energy storage and reforming unit of state lithium-base battery and semiconductor thermoelectric transformation technology, comprising: multiple all solid lithium base battery groups
1, battery case 2, semiconductor thermoelectric conversion system 3, battery management system 4, temperature sensor 5.
All solid lithium base battery group 1 includes multiple monomer all solid lithium bases being made of anode, solid electrolyte and cathode
Battery, there are certain spaces as air duct between all solid lithium base battery group 1；Battery case 2 includes cabinet, panel, cover board, push-and-pull
Mechanism, positioning sleeve, battery group baffle, Ventilating grid tray, fuse etc.；Battery management system 4 provides semiconductor thermoelectric transformation system
The direct current of system 3 inputs regulated power supply, and monitors the functions such as cell voltage, temperature, electric current and protection；Battery management system 4 wraps
Include DC power supply 11, temperature detecting module；DC power supply 11 is connected with thermoelectric pile 7, temperature sensor 5 and battery management system 4
Connection, the forward current direction for the temperature data control DC power supply 11 that temperature detecting module is sent according to each temperature sensor 5.
Temperature sensor 5 is connected using conducting wire with battery management system 4, is acquired the temperature of each Temperature Distribution point in real time, is above sent to electricity
Pond management system 4.
Semiconductor thermoelectric conversion system 3 is mounted on 2 inside of battery case, and the substrate 10 for heating the ceramics in face is in close contact entirely admittedly
State lithium-base battery group 1, wherein the fan 8 connected is against the air duct between all solid lithium base battery group 1；And the pottery of another refrigeration
The substrate 10 of porcelain is in close contact the Ventilating grid tray on battery case 2, and the fan 8 of connection is against 2 external environment of battery case.Complete
It is evenly arranged temperature sensor 5 inside solid-state lithium-base battery group 1, when collected temperature is normal in monomer all solid lithium base battery
In operating temperature range (such as 80-150 DEG C), semiconductor thermoelectric conversion system 3 is without work；When some temperature sensor
When 5 collected temperature are lower than the minimum point of monomer all solid lithium base battery normal working temperature range, battery management system 4 is defeated
Forward dc voltage out, battery case 2 is interior to open semiconductor heating mode, and heating end heats all solid lithium base battery group as heat source
1, and make 2 box house of battery case in a short time within the scope of temperature control to established temperature by fan 8, reach and quickly heats battery
In case 2 all solid lithium base battery group 1 and realize 1 space of all solid lithium base battery group in thermal balance purpose, and battery case 2 outside meeting
Semiconductor refrigerating mode is opened, achievees the purpose that cool down to the outer component of battery case 2 and space；When some temperature sensor 5 is adopted
When temperature is higher than highest point (such as 150 DEG C or more) of monomer all solid lithium base normal working temperature range in the battery case 2 collected,
Battery management system 4 provides reverse voltage to semiconductor heat electrotransformation component, opens semiconductor refrigerating inside 2 body of battery case
Mode, above-mentioned heating end becomes refrigeration end, and is sent cold wind to battery case by fan, formed cold cycling air-flow until
Entire battery pack cools to suitable temperature range, and semiconductor heating mode is opened outside Battery case, and is discharged by fan 8
Heat, or the heating outer component of battery case 2 and space environment.In addition, can be controlled by adjusting the size of 11 voltage of DC power supply
1 temperature of all solid lithium base battery group processed is within the scope of set monomer all solid lithium base battery normal working temperature.
It is connected in series between multiple all solid lithium base battery groups 1 inside battery case 2, all solid lithium base battery group 1 includes
There are multiple monomer all solid lithium base batteries, and monomer all solid lithium base battery is by plus plate current-collecting body, anode, solid electrolyte, negative
Pole, negative current collector close-packed arrays in order, and assembled by insulation crust.Monomer all solid lithium base battery positive electrode active material
Matter is by LiCoO2、LiNiO2、LiMn2O4、LiFePO4、LiCoPO4、Li(NiCoMn)O2、Li(NiCoAl)O2、Li2S、FeS、
NiS、TiS2It is formed Deng one or more combination of materials；Monomer all solid lithium base battery negative electrode active material is by Li, Li
Based alloy, various carbon materials, Si based alloy, Sn based alloy, Ti based alloy, Li2O、SiO2、SiO、SnO2、TiO2Deng one kind or two
Kind or more combination of materials form；Monomer all solid lithium base battery electrolyte is by Perovskite (perovskite), NASICON (sodium
Superionic conductors), LISICON (zinc germanate lithium), Garnet (garnet), LiPON, Li3N、Li4SiO4、Li3BO3、β-Al2O3、
β”-Al2O3、Li3PO4, sulfide (such as Li2S-P2S5、Li10GeP2S12Deng) etc. one or more kinds of inorganic solid state materials combinations
It forms.
It is in close contact between monomer all solid lithium base battery, there are certain spaces as wind between all solid lithium base battery group 1
The conducting wire in road, 1 centre of all solid lithium base battery group is connected to the pole plate of battery on one side, and other end is connected to battery management system 4, with
Just 1 voltage of all solid lithium base battery group is detected, to guarantee that all solid lithium base battery group 1 works normally.Each all solid lithium
Base battery group 1 is dispersed with fuse and temperature sensor 5, and when there is excessively high etc the abnormal phenomenon of temperature, fuse is automatic
Fusing, to protect entire all solid lithium base battery group 1.
As shown in Fig. 2, semiconductor thermoelectric conversion system 3 mainly includes the components such as thermoelectric pile 7, fan 8, substrate 10, thermoelectricity
Heap 7 includes metal plate 9, N-type semiconductor, P-type semiconductor, as shown in Figure 2.The different N-type semiconductor of two of them and p-type are partly led
The binary or multivariate solid solution or conjunction that body material is made of element Bi, Te, Cs, Bi, Sb, Ag, Cu, Ti, Y, Ba, Cu, Sr etc.
Oxide that gold and two or more elements are formed or be such oxide and solid solution or alloy material combination.N
Galvanic couple pair is composed in series with metallic conductor 9 (such as copper, aluminium or other metals) between type and P-type semiconductor, tens, up to a hundred or thousands of
A galvanic couple forms thermoelectric pile 7 to connecting on circuit, and is individually placed to 7 two sides of thermoelectric pile by two ceramic substrates 10, will be hot
Pile 7 is clipped among two substrates 10, and metallic conductor 9 is fixed on the substrate 10, and substrate 10 must insulate and thermally conductive good.In electricity
After connecting DC power supply 11 in road, the transfer of energy can be generated, electric current is inhaled by the connector that N-type semiconductor flows to P-type semiconductor
Heat is received, cold end is become, electric current discharges heat by the connector that P-type semiconductor flows to N-type semiconductor, becomes hot end, and cold and hot
End is installed by fan 8 respectively.
Semiconductor thermoelectric conversion system 3 is placed in battery case 2 and surveys, and connection fan 8 is opposite on ceramic 10 hot end of substrate
Air duct between all solid lithium base battery group 1；And another ceramic 10 cold end of substrate is placed on Ventilating grid tray on battery case 2
Interior survey, the fan 8 of the cold end above of substrate 10 is against external environment.
Each building block of the invention, connection type and relative position carry out etc. in the case where not changing its function
Effect transformation or substitution, also fall into protection scope of the present invention.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (7)
1. all solid state energy storage and reforming unit of a kind of semiconductor heat electric control temperature characterized by comprising all solid lithium base
Battery pack (1), battery case (2), semiconductor thermoelectric conversion system (3), battery management system (4), temperature sensor (5)；Quan Gu
State lithium-base battery group (1) includes m monomer all solid lithium base battery, wherein m is positive integer, each monomer all solid lithium base battery
On temperature sensor (5) are distributed with；Semiconductor thermoelectric conversion system (3) includes thermoelectric pile (7), fan (8), substrate (10)；Base
Plate (10) is separately mounted to thermoelectric pile (7) two sides, and fan is installed in the side not contacted with thermoelectric pile (7) on substrate (10) respectively
(8)；Battery management system (4) includes DC power supply (11), temperature detecting module；DC power supply (11) is connected with thermoelectric pile (7),
The forward current direction for temperature data control DC power supply (11) that temperature detecting module is sent according to each temperature sensor (5)；
Semiconductor thermoelectric conversion system (3) is mounted on all solid lithium base battery group (1) two sides and is adjacent to all solid lithium base battery group (1)；
All solid lithium base battery group (1), semiconductor thermoelectric conversion system (3), battery management system (4), temperature sensor (5) are mounted on
In battery case (2)；
The thermoelectric pile (7) includes N-type semiconductor, P-type semiconductor, metallic conductor (9)；N-type semiconductor and P-type semiconductor pass through
Metallic conductor (9) is composed in series galvanic couple pair, and n galvanic couple forms thermoelectric pile (7) to by metallic conductor (9) series connection, wherein n is
Positive integer；Metallic conductor (9) is fixed on substrate (10)；
The control law in temperature detecting module control DC power supply (11) forward current direction are as follows: when any one temperature sensing
When device (5) collected temperature is lower than the minimum of the monomer all solid lithium base battery normal working temperature range of setting, partly lead
Body heat electrotransformation system (3) is adjacent on the substrate (10) of all solid lithium base battery group (1) side the forward direction electricity in metallic conductor (9)
Stream flows to N-type semiconductor from P-type semiconductor；When any one temperature sensor (5) collected temperature is higher than the monomer of setting
When the peak of all solid lithium base battery normal working temperature range, semiconductor thermoelectric conversion system (3) is adjacent to all solid lithium base
Forward current on the substrate (10) of battery pack (1) side in metallic conductor (9) flows to P-type semiconductor from N-type semiconductor.
2. all solid state energy storage and reforming unit of a kind of semiconductor heat electric control temperature according to claim 1, feature
Be: the normal working temperature range of the monomer all solid lithium base battery set is 60 DEG C~200 DEG C.
3. all solid state energy storage and reforming unit of a kind of semiconductor heat electric control temperature according to claim 1 or 2, special
Sign is: all solid lithium base battery group (1) has i, there is air duct between each all solid lithium base battery group (1), on substrate (10)
The fan (8) for being adjacent to side installation with all solid lithium base battery group (1) is corresponding with air duct, wherein i is positive integer.
4. all solid state energy storage and reforming unit of a kind of semiconductor heat electric control temperature according to claim 1 or 2, special
Sign is: substrate (10) material is ceramics.
5. all solid state energy storage and reforming unit of a kind of semiconductor heat electric control temperature according to claim 1 or 2, special
Sign is: the positive active material of the monomer all solid lithium base battery is LiCoO2、LiNiO2、LiMn2O4、LiFePO4、
LiCoPO4、Li(NiCoMn)O2、Li(NiCoAl)O2、Li2S、FeS、NiS、TiS2Middle a kind of or combination.
6. all solid state energy storage and reforming unit of a kind of semiconductor heat electric control temperature according to claim 5, feature
Be: the negative electrode active material of the monomer all solid lithium base battery is Li, Li based alloy, carbon material, Si based alloy, the conjunction of Sn base
Gold, Ti based alloy, Li2O、SiO2、SiO、SnO2、TiO2Middle a kind of or combination.
7. all solid state energy storage and reforming unit of a kind of semiconductor heat electric control temperature according to claim 6, feature
Be: the electrolyte of the monomer all solid lithium base battery be Perovskite, NASICON, LISICON, Garnet, LiPON,
Li3N、Li4SiO4、Li3BO3、β-Al2O3、β”-Al2O3、Li3PO4, a kind of in sulfide or combination.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101652896A (en) * | 2007-04-04 | 2010-02-17 | Sk能源株式会社 | Battery temperature controller for electric vehicle using thermoelectric semiconductor |
| CN101720414A (en) * | 2007-05-25 | 2010-06-02 | Bsst有限责任公司 | System and method for distributed thermoelectric heating and colling |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101652896A (en) * | 2007-04-04 | 2010-02-17 | Sk能源株式会社 | Battery temperature controller for electric vehicle using thermoelectric semiconductor |
| CN101720414A (en) * | 2007-05-25 | 2010-06-02 | Bsst有限责任公司 | System and method for distributed thermoelectric heating and colling |
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