CN105826619A - Constant-temperature thermal management system for lithium-ion power battery pack - Google Patents
Constant-temperature thermal management system for lithium-ion power battery pack Download PDFInfo
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- CN105826619A CN105826619A CN201510004894.6A CN201510004894A CN105826619A CN 105826619 A CN105826619 A CN 105826619A CN 201510004894 A CN201510004894 A CN 201510004894A CN 105826619 A CN105826619 A CN 105826619A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to a constant-temperature thermal management system for a lithium-ion power battery pack. The thermal management system comprises the lithium-ion power battery pack which comprises a battery box, a plurality of single lithium batteries, a heating sheet, an electronic refrigerating sheet and a fan, a power input change-over switch which comprises two interfaces connected to an external power supply and an internal power supply, a direct current (DC)/alternating current (AC) variable-frequency inversion controller which is used for outputting power inputted by the power input change-over switch to the refrigerating sheet or the heating sheet after voltage and frequency conversion, a voltage acquisition module for acquiring the voltage of the inputted power and the output voltage of the voltage DC/AC variable-frequency inversion controller, a temperature acquisition module for acquiring the temperature of the single lithium batteries, and a master controller which is used for controlling the heating sheet or the electronic refrigerating sheet to heat or refrigerate the single lithium batteries according to the temperature of the single lithium batteries. The thermal management system disclosed by the invention is applicable to the constant-temperature control of the single lithium batteries or is capable of controlling the temperature of the single lithium batteries within a reasonable temperature range.
Description
Technical field
The application relates to a kind of Li-ion batteries piles thermal management device, particularly relates to the high-pressure frequency-conversion constant temp. heating management system of a kind of pure electric automobile lithium-ion-power cell
Background technology
Lithium ion battery is present stage most probable large-scale application in the battery of electric automobile, has the cost performance of optimum and wide application prospect.But lithium ion battery needs could normally work in certain temperature range, and temperature is to affect the important parameter of lithium battery performance.When numerous lithium batteries in groups after, if temperature is unbalanced, the homogeneity that can cause battery is poor, and then trigger monomer battery performance difference, battery was existed and breaks through the risk put, shorten the energy-storage system life-span, electric automobile continual mileage can be caused simultaneously to decline.Can not charge at low temperatures or inconvenience greatly can only be there is when winter uses or when weather severe cold area uses with minimum electric current charging, had a strong impact on the application of electric automobile.This is to be increased dramatically 5-100 times owing to room temperature (such as 25 DEG C) is compared in the internal resistance of (such as-20 DEG C) lithium ion battery at low temperatures, and when charging normal, voltage quickly arrives higher limit, can be charged into electricity little；Having the hidden danger that Li dendrite separates out on negative pole, lithium dendrite growth causes internal short-circuit of battery to a certain degree piercing through barrier film, and on fire or explosion accident occurs simultaneously.Profound cause has two parts to cause, one is that under low temperature, the electrical conductivity at low temperatures of organic electrolyte used by lithium ion battery is substantially reduced and causes, adjust composition solvent composition and understand some improvement, such as increase the ratio etc. of PC composition, but battery overall performance can be had adverse effect on, adjust limitation, it is impossible to tackle the problem at its root；Two be lithium ion battery plus-negative plate material itself at low temperatures, lithium ion increases considerably at the transfger impedance of material interface, the diffusion impedance of material internal and causes；Ameliorative way have material is carried out nanorize process reduce interface resistance, use the positive electrodes such as LiMn2O4, the negative materials such as hard carbon reduce diffusion inside resistance, achieving certain improvement, but compare room temperature, the charging current of safety is also intended to little 2-5 times, the series of problems such as manufacturing cost increase, energy density reduction can be brought simultaneously, otherwise more than 55 DEG C, also there will be danger, need battery is dispelled the heat.
Current existing battery bag heat management system the most only possesses natural air cooled, and such cooling-down effect is inconspicuous, does not has thermostatic control effect；Heating uses the heating of PTC heater, traditional method is by fan, heat to be spread, though this mode can package overall heating function to battery, but the temperature uniformity that battery bag is whole group is the highest, interior-heat skewness, internal difference in temperature is excessive, and traditional computer heating control is exactly voltage source directly to be connected PTC heater to realize the work of PTC heater and stopping, and capacity usage ratio is the highest.
In view of current battery heat management limitation more or less, it is necessary to existing battery thermal management scheme and strategy are improved further.
Summary of the invention
The purpose of the application is, it is provided that a kind of lithium-ion-power cell bag constant temp. heating management system so that it is within the scope of reasonable temperature, cell can be carried out thermostatic control.
To achieve these goals, a kind of lithium-ion-power cell bag constant temp. heating management system proposed according to the present invention, comprising: lithium-ion-power cell bag, including: Battery case, it is internally provided with air channel；Multiple single lithium battery, are arranged in this Battery case；Heating plate, is arranged at this single lithium battery periphery each；Electronic refrigerating sheet, is arranged on outside this Battery case, is connected with the heat-conducting plate heat conduction within this Battery case；Fan, is arranged in this Battery case, is connected with this heat-conducting plate, and the low temperature that this fan produces cooling piece is by uniform being diffused between each single lithium battery in this air channel；Power supply input switching switch, has connection external power source and two interfaces of internal electric source；DC/AC frequency conversion inverter controller, exports to this cooling piece or this heating plate after the power supply variable voltage variable frequency of this power supply input switching switch input；Voltage acquisition module, gathers the output voltage of the voltage DC/AC frequency conversion inverter controller of this input power；Temperature collect module, gathers the temperature of this single lithium battery；And master controller, communicated with BMS controller by CAN communication module, receive the information whether external power source of this BMS controller transmission connects, control the power supply of this power supply input switching switch connection；This master controller, according to the temperature of this single lithium battery, controls this heating plate or this electronic refrigerating sheet, heats this single lithium battery or freeze.
The present invention also can be applied to the following technical measures to achieve further.
Aforesaid lithium-ion-power cell bag constant temp. heating management system, wherein said master controller, when the temperature of this single lithium battery is less than the first temperature threshold, controls this DC/AC frequency conversion inverter controller and power to heating plate so that in the range of the temperature of this single lithium battery is maintained at the second temperature threshold；When the temperature of this single lithium battery is higher than the 3rd temperature threshold, controls this DC/AC frequency conversion inverter controller and power to this cooling piece so that in the range of the temperature of this single lithium battery is maintained at the 3rd temperature threshold.
Aforesaid lithium-ion-power cell bag constant temp. heating management system, wherein said DC/AC frequency conversion inverter controller includes freeze voltage transformation unit and heating voltage unit, this refrigeration voltage transformation unit out-put supply is to this cooling piece, this heating voltage unit has multiple power output, provides independent power supply for each this heating plate.
Aforesaid lithium-ion-power cell bag constant temp. heating management system, wherein said DC/AC frequency conversion inverter controller has interlocking mechanism, and when a cell operation in this refrigeration voltage transformation unit and this heating voltage unit, another unit quits work.
Aforesaid lithium-ion-power cell bag constant temp. heating management system, is provided with gap and connects with this air channel between wherein said single lithium battery.
Aforesaid lithium-ion-power cell bag constant temp. heating management system, the wherein said gap size between this single lithium battery, along with the change from this fan distance becomes big greatly.
Aforesaid lithium-ion-power cell bag constant temp. heating management system, wherein said master controller controls the power of this heating plate or this electronic refrigerating sheet by the size that PID frequency conversion adjusts wide mode to control the electric current that this DC/AC frequency conversion inverter controller exports.
Aforesaid lithium-ion-power cell bag constant temp. heating management system, wherein said master controller is adjusted wide mode to control electric current and the power of this fan of the output of this DC/AC frequency conversion inverter controller by PI frequency conversion, is controlled the low temperature air quantity in this air channel.
Aforesaid lithium-ion-power cell bag constant temp. heating management system, wherein said master controller, by controlling the electric current of this DC/AC frequency conversion inverter controller output, independently controls the heating-up temperature of this single lithium battery each.
Aforesaid lithium-ion-power cell bag constant temp. heating management system, wherein said master controller, when this lithium-ion-power cell bag is in charged state, controls this power supply input switching switch and selects to connect external power source；When this lithium-ion-power cell bag is in discharge condition, controls this power supply input switching switch and select to connect internal electric source.
The present invention compared with prior art has clear advantage and beneficial effect.By technique scheme, the lithium-ion-power cell bag constant temp. heating management system of the present invention, at least have the advantage that
One, the lithium-ion-power cell bag constant temp. heating management system of the present invention, it is possible within the scope of reasonable temperature, cell is carried out thermostatic control.
Two, the lithium-ion-power cell bag constant temp. heating management system of the present invention, directly acts on single lithium battery surface by METAL HEATING PROCESS sheet thermal energy conduction, and thermal losses is little, and efficiency is high, and conduction velocity is fast；Sheet metal plays the effect of fin when heat radiation simultaneously.
Three, the lithium-ion-power cell bag constant temp. heating management system of the present invention, adjust wide regulation technology based on PID frequency conversion, improve capacity usage ratio, increase vehicle continual mileage, meet control cell simultaneously and carry out thermostatic control in reasonable temperature scope, and improve temperature control levels of precision.
Four, the lithium-ion-power cell bag constant temp. heating management system of the present invention, is controlled by temperature, Voltage Feedback, can individually heat each single lithium battery, and power adjustable saves, it is achieved that the concordance of each single lithium battery temperature.
Five, the lithium-ion-power cell bag constant temp. heating management system of the present invention, adjusts wide mode to control the electric energy of DC/AC frequency conversion inverter controller output by PID frequency conversion, improves thermoregulator efficiency, decrease power consumption simultaneously.
Six, the lithium-ion-power cell bag constant temp. heating management system of the present invention, the gap between single lithium battery uses different size, is diffused into each elemental metals sheet surface uniform for the cold wind of cooling piece and fan generation from the near to the remote.
Seven, the lithium-ion-power cell bag constant temp. heating management system of the present invention, the heating face of electronic refrigerating sheet is arranged in the outside of battery case, chill surface is embedded in battery case, so only utilizes refrigeration simple function, will not affect refrigeration because of heating and chill surface in same space.
Accompanying drawing explanation
Fig. 1 is the structural representation of lithium-ion-power cell bag of the present invention.
Fig. 2 is the block diagram of lithium-ion-power cell bag constant temp. heating of the present invention management system one embodiment.
Fig. 3 is the schematic perspective view of the heating plate in lithium-ion-power cell bag of the present invention.
Detailed description of the invention
By further illustrating the technological means and effect that the present invention taked by reaching predetermined goal of the invention, below in conjunction with accompanying drawing and preferred embodiment, lithium-ion-power cell bag constant temp. heating management its detailed description of the invention of system, step, structure, feature and the effect thereof proposed according to the present invention is described in detail.
Refer to shown in Fig. 1, Fig. 2, be the structural representation of lithium-ion-power cell bag of the present invention, the block diagram of lithium-ion-power cell bag constant temp. heating management system respectively.
Lithium-ion-power cell bag of the present invention, including: Battery case 1, multiple single lithium battery 2, heating plate 3, air channel 4, heat management master controller 5；Electronic refrigerating sheet 6；Fan 7；BMS controller 8；Heat-conducting plate 9.
Described Battery case 1 is monoblock type waterproof case, and medial surface lays heat-insulating and fire-proof foam.This electronic refrigerating sheet 6 is arranged on the outside of Battery case 1, and cooling piece 6 is connected with box house heat-conducting plate 9 heat conduction.This fan 7 is arranged in Battery case 1, is connected with heat-conducting plate 9, and the low temperature that 7 cooling pieces 6 of fan produce is diffused between each single lithium battery 2 by air channel 4.It is outside that cooling piece 6 is placed on Battery case 1, is beneficial to the heating face of cooling piece 6 to be exposed to outside casing heat radiation.Multiple single lithium battery 2 are contained in Battery case 1, and air channel 4 is arranged at the centre position of Battery case 1, be provided with gap and connect with this air channel 4 between single lithium battery 2.Gap size between this single lithium battery 2, along with the change from fan 7 distance becomes big greatly, i.e. the gap size between this single lithium battery 2 becomes big successively, it is ensured that the air quantity between single lithium battery 2 is consistent.This heating plate 3 five bread covers single lithium battery 2, forms the metal shell of an one end open, arranges thermal conductive insulation glue between this heating plate 3 and single lithium battery 2.Between single lithium battery 2, gap is set, it is easy to wind circulation.This heat management master controller 5 and BMS controller 8 is arranged with in Battery case 1, and by CAN communication between them, this heat management master controller 5 control line is connected to heating plate 3, fan 7, electronic refrigerating sheet 6.
Please refer to shown in Fig. 3, the shell of this heating plate 3 is the metal shell of 20 to 30 ohm, and this single lithium battery 2 is contained in inside this this heating plate 3；Electrical connection interface L and N of this heating plate 3, connects DC/AC frequency conversion inversion module by high temperature insulation electric wire, obtains DC pulse power supply.
The lithium-ion-power cell bag constant temp. heating management system of the present embodiment, including: master controller 5, DC/AC frequency conversion inverter controller 13, electronic refrigerating sheet 6, heating plate 3, power supply input switching switch 11, voltage acquisition module 15, temperature collect module 17, CAN communication module 19 and fan 7.
Described power supply input switching switch 11 has the interface connecting two kinds of different input powers, and one is to connect external charging power supply, and another kind is to connect lithium-ion-power cell bag high voltage power supply.When lithium-ion-power cell bag needs charging to connect external charging power supply, this power supply input switching switch 11 utilizes this external charging power supply to carry out heating or freezing, and when being not connected with external charging power supply, this power supply input switching switch 11 lithium-ion-power cell bag high voltage power supplies carry out heating or freezing.
Described DC/AC frequency conversion inverter controller 13, exports after this input power variable voltage variable frequency to cooling piece 6 or heating plate 3.This DC/AC frequency conversion inverter controller 13 includes freeze voltage transformation unit 131, heating voltage unit 133, this refrigeration voltage transformation unit 31 out-put supply is to this cooling piece 6, this heating voltage unit 133 has multiple power output, provides independent power supply for each heating plate 3.
Described voltage acquisition module 15, gathers the voltage of this input power, the output voltage of C/AC frequency conversion inverter controller 13, and information of voltage sends to this master controller 5.
Described temperature collect module 17, gathers the temperature of this single lithium battery 2, and this temperature information sends to this this master controller 5.
Described master controller 5, for example with Freescale MC9S12XEG128MAA single-chip microcomputer and auxiliary circuit thereof.This master controller 5 is communicated with this BMS controller 8 by this CAN communication module 19, receives the information whether external power source of this BMS controller 8 transmission connects.This master controller 5 controls the operation of this fan 7, controls the power supply energy of this DC/AC frequency conversion inverter controller 13 output.
The information whether this master controller 5 connects according to this external power source, determines the power supply type of use；Such as, lithium-ion-power cell bag in the charge state, connects direct current 12V external power source by this power supply input switching switch 11 from charger interface；Lithium-ion-power cell bag in the discharged condition, connects direct current 110V high voltage power supply by this power supply input switching switch 11 from lithium-ion-power cell bag.
The lithium-ion-power cell bag constant temp. heating management system of the present embodiment, this single lithium battery 2, according to the temperature of this single lithium battery 2, is heated or freezes by this master controller 5.
1) when the temperature of single lithium battery 2 is less than the first temperature threshold (such as 0 DEG C ± 5 DEG C), this master controller 5 controls this DC/AC frequency conversion inverter controller 13 and powers to heating plate 3；Heating plate 3, as feedback parameter, is controlled by this single lithium battery 2 temperature signal by master controller 5；When the temperature of single lithium battery 2 reaches the second temperature threshold (such as 20 DEG C ± 5 DEG C), this master controller 5 controls the heat that adds of this heating plate 3, keeps heating and heat dissipation balancing so that this single lithium battery 2 is in the range of the second temperature threshold.This master controller 5 adjusts wide mode to control heating plate 3 by frequency conversion, can be to set of cells large current charge.
2) when the temperature of single lithium battery 2 is higher than the 3rd temperature threshold (such as 45 DEG C ± 5 DEG C), this master controller 5 controls DC/AC frequency conversion inverter controller 13 and powers to cooling piece 6, and control this semiconductor chilling plate 6 temperature and the rotating speed of fan 7, low temperature is produced by this semiconductor chilling plate 6,7 Cryogenic air of this fan pass to each single lithium battery 2 surface by air channel, lower the temperature single lithium battery 2；When the temperature of single lithium battery 2 reaches the 3rd temperature threshold (such as 30 DEG C ± 10 DEG C), this master controller 5 controls this semiconductor chilling plate 6 temperature and the rotating speed of fan 7, keep refrigeration and heat dissipation balancing so that this single lithium battery 2 is in the range of the 3rd temperature threshold.
The lithium-ion-power cell bag constant temp. heating management system of the present invention, this DC/AC frequency conversion inverter controller 13 is to power supply frequency conversion, and this heating plate 3 utilizes variable-frequency power sources to heat, directly heat energy by insulation silica gel conduction in single lithium battery 2 surface, thermal losses is little, and efficiency is high.It addition, by temperature feedback control, each single lithium battery 2 individually can be heated, it is achieved that the concordance of each single lithium battery 2 temperature.The heating plate 3 of the present embodiment also acts as thermolysis when cooling, has heating, heat radiation double effects.
The lithium-ion-power cell bag constant temp. heating management system of the present embodiment, it is possible to use outer low pressure, two kinds of power supplys of internal high pressure, can work when Vehicular charging and electric discharge, and motility is high.The lithium-ion-power cell bag constant temp. heating management system of the present embodiment, the heating end of cooling piece 6 is placed on outside casing, dispels the heat by natural cooling, prevents from affecting refrigeration in case.
Although the present invention is disclosed above with preferred embodiment, being so not limited to the scope that the present invention implements, the simple equivalence made according to claims of the present invention and description changes and modifies, and still falls within the range of technical solution of the present invention.
Claims (10)
1. a lithium-ion-power cell bag constant temp. heating management system, it is characterised in that comprising:
Lithium-ion-power cell bag, including: Battery case, it is internally provided with air channel；Multiple single lithium battery, are arranged in this Battery case；Heating plate, is arranged at this single lithium battery periphery each；Electronic refrigerating sheet, is arranged on outside this Battery case, is connected with the heat-conducting plate heat conduction within this Battery case；Fan, is arranged in this Battery case, is connected with this heat-conducting plate, and the low temperature that this fan produces cooling piece is diffused between each this single lithium battery by this air channel；
Power supply input switching switch, has connection external power source and two interfaces of internal electric source；
DC/AC frequency conversion inverter controller, exports to this cooling piece or this heating plate after the power supply variable voltage variable frequency of this power supply input switching switch input；
Voltage acquisition module, gathers the output voltage of the voltage DC/AC frequency conversion inverter controller of this input power；
Temperature collect module, gathers the temperature of this single lithium battery；And
Master controller, is communicated with BMS controller by CAN communication module, receives the information whether external power source of this BMS controller transmission connects, and controls the power supply of this power supply input switching switch connection；This master controller, according to the temperature of this single lithium battery, controls this heating plate or this electronic refrigerating sheet, heats this single lithium battery or freeze.
2. lithium-ion-power cell bag constant temp. heating management system as claimed in claim 1, it is characterized in that wherein said master controller, when the temperature of this single lithium battery is less than the first temperature threshold, control this DC/AC frequency conversion inverter controller to power to heating plate so that in the range of the temperature of this single lithium battery is maintained at the second temperature threshold；When the temperature of this single lithium battery is higher than the 3rd temperature threshold, controls this DC/AC frequency conversion inverter controller and power to this cooling piece so that in the range of the temperature of this single lithium battery is maintained at the 3rd temperature threshold.
3. lithium-ion-power cell bag constant temp. heating management system as claimed in claim 1, it is characterized in that wherein said DC/AC frequency conversion inverter controller includes freeze voltage transformation unit and heating voltage unit, this refrigeration voltage transformation unit out-put supply is to this cooling piece, this heating voltage unit has multiple power output, provides independent power supply for each this heating plate.
4. lithium-ion-power cell bag constant temp. heating management system as claimed in claim 3, it is characterized in that wherein said DC/AC frequency conversion inverter controller has interlocking mechanism, when a cell operation in this refrigeration voltage transformation unit and this heating voltage unit, another unit quits work.
5. lithium-ion-power cell bag constant temp. heating management system as claimed in claim 1, it is characterised in that be provided with gap between wherein said single lithium battery and connect with this air channel.
6. lithium-ion-power cell bag constant temp. heating management system as claimed in claim 4, it is characterised in that the wherein said gap size between this single lithium battery, along with the change from this fan distance becomes big greatly.
7. lithium-ion-power cell bag constant temp. heating management system as claimed in claim 1, it is characterised in that wherein said master controller controls the power of this heating plate or this electronic refrigerating sheet by the size controlling the electric current of this DC/AC frequency conversion inverter controller output.
8. lithium-ion-power cell bag constant temp. heating management system as claimed in claim 1, it is characterised in that wherein said master controller, by controlling electric current and the power of this fan of the output of this DC/AC frequency conversion inverter controller, controls the low temperature air quantity in this air channel.
9. lithium-ion-power cell bag constant temp. heating management system as claimed in claim 1, it is characterised in that wherein said master controller, by controlling the electric current of this DC/AC frequency conversion inverter controller output, independently controls the heating-up temperature of this single lithium battery each.
10. lithium-ion-power cell bag constant temp. heating management system as claimed in claim 1, it is characterised in that wherein said master controller, when this lithium-ion-power cell bag is in charged state, controls this power supply input switching switch and selects to connect external power source；When this lithium-ion-power cell bag is in discharge condition, controls this power supply input switching switch and select to connect internal electric source.
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| CN106602178A (en) * | 2017-01-09 | 2017-04-26 | 扬州兴通锂电科技有限公司 | Lithium battery heating system |
| CN106960987A (en) * | 2017-04-05 | 2017-07-18 | 孔祥贵 | It is a kind of to balance cold and hot temperature control storage pond |
| CN107317065A (en) * | 2017-06-23 | 2017-11-03 | 东风商用车有限公司 | A kind of power battery thermal management system and its control method based on TEC |
| CN107329090A (en) * | 2017-06-14 | 2017-11-07 | 北京新能源汽车股份有限公司 | Electrokinetic cell Thermal Balance Test method and apparatus |
| CN108172938A (en) * | 2017-12-25 | 2018-06-15 | 华南理工大学广州学院 | A kind of power battery thermal management |
| CN108493512A (en) * | 2018-05-03 | 2018-09-04 | 自贡同发荣实业有限公司 | A kind of lithium battery safety system |
| CN109709364A (en) * | 2018-12-19 | 2019-05-03 | 中科廊坊过程工程研究院 | A kind of thermostat |
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| CN112721735A (en) * | 2020-12-30 | 2021-04-30 | 上海汽车集团股份有限公司 | Intelligent thermal management control method and control system for power battery |
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| CN108493512A (en) * | 2018-05-03 | 2018-09-04 | 自贡同发荣实业有限公司 | A kind of lithium battery safety system |
| CN109709364A (en) * | 2018-12-19 | 2019-05-03 | 中科廊坊过程工程研究院 | A kind of thermostat |
| CN112736319B (en) * | 2020-12-28 | 2022-02-15 | 滁州学院 | Battery temperature compensation device of electric bicycle |
| CN112736319A (en) * | 2020-12-28 | 2021-04-30 | 滁州学院 | Battery temperature compensation device of electric bicycle |
| CN112721735A (en) * | 2020-12-30 | 2021-04-30 | 上海汽车集团股份有限公司 | Intelligent thermal management control method and control system for power battery |
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| CN105826619B (en) | 2018-05-08 |
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