CN2850003Y - Heat balance treater for lithium ion power battery - Google Patents
Heat balance treater for lithium ion power battery Download PDFInfo
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- CN2850003Y CN2850003Y CN 200520065819 CN200520065819U CN2850003Y CN 2850003 Y CN2850003 Y CN 2850003Y CN 200520065819 CN200520065819 CN 200520065819 CN 200520065819 U CN200520065819 U CN 200520065819U CN 2850003 Y CN2850003 Y CN 2850003Y
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- heat
- heat balance
- lithium
- treatment fluid
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Abstract
The utility model discloses a heat balance processing device for a lithium ion power battery pack, which comprises a battery box, a hydraulic pump, a heat conductor, a heat balance processing liquid box, a radiator and a heater, wherein the heat conductor is positioned inside the battery box, the hydraulic pump, the heat balance processing liquid box, the radiator and the heater are positioned outside the battery box, and a through hole of the heat conductor, which is positioned inside the battery box and is matched with the outer surface of the lithium battery, is connected with the hydraulic pump, the heat balance processing liquid box, the radiator and the heater through a guide pipe. The device can cause the lithium battery pack to operate within the required normal temperature range, the use is not influenced or the utility model is not damaged because of the intense change of temperature, and the application efficiency, the safety and the service life of the battery pack are enhanced.
Description
Technical field
The utility model relates to battery heat balance process field, specifically is lithium-ion-power cell group heat balance device.
Background technology
World oil supply in recent years signals for help repeatedly, and the development electric motor car becomes one of means that address this problem.At present, in the flow of research of electric motor car, the research and development of power battery pack become key.In existing multiple electrokinetic cell, lithium-ion-power cell becomes the important directions of electrokinetic cell development because of having specific energy height, long service life, advantage such as pollution-free substantially.Current, Preliminary Applications is on vehicles such as electric bicycle, battery-operated motor cycle, electric automobile for the lithium-ion-power cell group, but ubiquity lithium-ion-power cell group heat balance is handled problems.Lithium-ion-power cell can produce a large amount of heat when discharging and recharging.The lithium-ion-power cell group has higher requirement to heat balance, and as not taking effective heat balance treatment technology, the lithium-ion-power cell group then can't reach desirable result of use.Experiment shows: the storing temperature of battery pack is :-40 ℃～60 ℃; The environment for use temperature is :-25 ℃～50 ℃; When the temperature of battery during at-25 ℃～-10 ℃, battery charge is difficulty very, and discharge also can only be emitted 50% capacity with the speed of 0.5C; When battery temperature during at-10 ℃～0 ℃, the battery charge ability drop; When battery temperature during at 0 ℃～50 ℃, battery is in normal operating state; When battery temperature during at 50 ℃～60 ℃, the battery discharge ability drop; When battery temperature when using more than 60 ℃, irreversible damage may take place in battery; When battery temperature more than 120 ℃, battery safety valve starts, the electrolyte ejection, battery is scrapped.
It generally is to adopt ventilation blower that battery surface is carried out air blast cooling that prior art is handled lithium-ion-power cell group heat balance, though this method can reduce the temperature of battery to a certain extent, but can not solve the heat dissipation problem of battery case inside well, also can't heat battery pack.Also there are shortcomings such as power consumption is high, noise is big, fragile in this method simultaneously, causes the application efficiency of lithium-ion-power cell group low, fail safe is low and useful life short.How effectively to solve the heat radiation and the heating of lithium battery group inside, make it in suitable temperature range work, the technology that still finds no this respect at present is open.
The utility model content
The purpose of this utility model is at the deficiencies in the prior art, and the method and the device that provide a kind of lithium-ion-power cell group heat balance to handle are to improve efficient, fail safe and the useful life of lithium-ion-power cell group.
The purpose of this utility model is achieved through the following technical solutions:
Lithium-ion-power cell group heat balance processing unit:
Lithium-ion-power cell group heat balance processing unit is characterized in that described device comprises hydraulic pump, the heat carrier that cooperates with lithium battery group outer surface, heat balance treatment fluid case, radiator and heater; Described heat carrier is positioned at battery case inside, described hydraulic pump, heat balance treatment fluid case, radiator and heater are positioned at the battery case outside, the described inner and heat carrier that cooperates with lithium battery group outer surface of battery case that is positioned at connects and composes the loop that circulates of heat balance treatment fluid by conduit and hydraulic pump, heat balance treatment fluid case, radiator and heater, and described heat carrier is the cavity that has through hole of optimum Heat Conduction Material making; Described heat balance treatment fluid is no water coolant or water and ethylene glycol mixtures.
Be the better the purpose of this utility model that realizes, hydraulic pump one end of lithium-ion-power cell group heat balance processing unit is connected through the through hole arrival end of conduit with the heat carrier that cooperates with lithium battery group outer surface, the other end is connected with radiator, radiator is connected with the heat balance treatment fluid case port of export, and heat balance treatment fluid tank inlet end is connected with the through hole port of export; Described heat balance treatment fluid heater is positioned at heat balance treatment fluid case.The described heat carrier that cooperates with lithium battery group outer surface is between the outer surface of lithium battery or two-layer up and down lithium battery.The preferred heat conductive rubber of heat-conductive coating or the organosilicon heat-conductive coating of described heat carrier outer surface coating.The preferred electrical bar of described heater.The preferred fan-cooled radiator of described radiator.The no water coolant of love temperature (NPG+) that the du pont company that the preferred market of described no water coolant can be bought is produced.The preferred ethylene glycol content of water and ethylene glycol mixtures is at 50% water and ethylene glycol mixture.
Operation principle:
The lithium-ion-power cell group is worked under different temperatures, and the heat that the heat balance treatment fluid need be taken away or provide can calculate by following formula:
Qd＝K·Qg
Qd: the heat that the heat balance treatment fluid is taken away or provided
Qg: the heat that battery is emitted or absorbed
K: efficiency factor, general K=2～3
Example: through test, the environment for use temperature of lithium battery is-25 ℃～50 ℃.For the 80Ah lithium-ion-power cell, heating speed is 60J/ ℃ of min, in use causes the battery heating, destroys heat balance.This characteristic according to lithium-ion-power cell, make it reach best result of use, can be by the mobile circulation circuit system process lithium-ion-power cell outer surface of heat balance treatment fluid, when battery power discharge, the heat balance treatment fluid in the circulation circuit system is taken away the part heat of battery surface; When ambient temperature below 0 ℃ and when charging, utilize heater to the heating of heat balance treatment fluid, make battery temperature be elevated to ideal value, so battery pack can be carried out exchange heat with the external world, reach heat balance, guarantee battery pack operate as normal in certain temperature range.
Advantage of the present utility model:
(1) can improve application efficiency, fail safe and the useful life of lithium-ion-power cell group;
(2) guarantee the lithium battery group not Yin Wendu acute variation and influencing use or damage;
(3) simple and practical, processing easily;
(4) material therefor is an aluminium alloy, and cost is low, environmental protection and long service life.
Description of drawings
Fig. 1 is a fundamental diagram of the present utility model.
Fig. 2 is the horizontal cross of Fig. 1 along the A-A face.
Fig. 3 is the structural representation of the utility model embodiment 2.
Fig. 4 is the cutaway view of Fig. 3 along the B-B face.
Fig. 5 is the structural representation of the utility model embodiment 3
Fig. 6 is the cutaway view of Fig. 5 along the C-C face.
Shown in the figure: battery case-1; Heat carrier through hole arrival end-2; The heat carrier through hole port of export-3; Conduit-4; Hydraulic pump-5; Radiator-6; Treatment fluid case-7; Heater-8; Heat carrier-9; Electrokinetic cell-10.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail, but the claimed scope of the utility model is not limited to the scope that embodiment represents.
The utility model is used for providing the cell capacity greater than 30Ah, and battery power is greater than the power configuration occasion of 1kw, as electric automobile, electric airplane, electronic submarine, electric robot and high-power electric instrument etc.
Embodiment 1
Be used for European SAM electric automobile.The lithium-ion-power cell group: rated capacity is 7.8kWh, and rated voltage is 97.2V.The shell of battery case adopts aluminum alloy materials, and built-in rated capacity is 27 of 80Ah lithium-ion-power cells, battery management system one cover, one group of 250A dc circuit breaker, heat balance processing unit one cover.Treatment fluid storage capacity is 3L in the heat carrier through hole.The battery pack casing adopts totally-enclosed design, with moistureproof, damp proof, dustproof, leaves venthole between battery plus-negative plate stube cable and battery case, in case expand with heat and contract with cold to the influence of battery.The built-in 250A dc circuit breaker of battery case, external cable is connected with dc circuit breaker, and stube cable should be able to bear the above electric current of 300A.Battery management system (BMS) is connected with external system by the front end socket.Dc circuit breaker one end is connected with battery, and the other end is connected with electrical system on the automobile.The heat balance processing unit is connected with control system on the automobile, and power supply adopts vehicle power or external power source, and during as battery power discharge, cooling device adopts vehicle power to power with hydraulic pump; When battery pack was charged below 0 ℃, heater and hydraulic pump adopted outside power supply power supply.
The battery case shell is connected with car body ground connection, to eliminate static.Battery case can push Che Liangshang behind car, connect both positive and negative polarity cable and BMS line at front end, should there be slip or tourelle the following of vehicle beam cavity body placement battery case, and front end should have positioner, should there be locking device the rear end, should consider shockproof between battery case and the car beam.Cell places unique position of battery case, and positioner is arranged, BMS too, system connects the sealing of bonnet upper cover plate, so when replacing battery or BMS, battery case need only be extracted out from the car beam, opens cover plate and gets final product.
As shown in Figure 1, 2, three layers of placement of lithium battery component, the front end of cabinet shell 1 offers the heat carrier through hole arrival end 2 and the heat carrier through hole port of export 3, and heat carrier 9 is for having the cavity of through hole.Lithium-ion-power cell group heat balance processing unit comprises conduit 4, hydraulic pump 5, radiator 6, heat balance treatment fluid case 7 and heater 8, the heat carrier 9 that cooperates with lithium battery group outer surface; Hydraulic pump 5 one ends are connected through the through hole arrival end 2 of conduit 4 with the heat carrier 9 that cooperates with lithium battery group outer surface, the other end is connected with radiator 6, radiator 6 is connected with heat balance treatment fluid case 7, heat balance treatment fluid case 7 is connected with the heat carrier through hole port of export 3, and described heat balance treatment fluid heater 8 is positioned at heat balance treatment fluid case 7.Heat carrier 9 is divided into two parts up and down, the top heat carrier is between top battery group and middle cell, the lower guide hot body is between middle cell and bottom battery group, upper guide hot body inner via hole is communicated with lower guide hot body inner via hole, heat carrier all cooperates with lithium battery group bottom or outer surface of cupular part up and down, and its gross contact area is 501250mm
2, account for 35.3% of lithium battery group total surface area.The heat balance treatment fluid is water and ethylene glycol mixture, and wherein ethylene glycol content is 50%.Hydraulic pump 5 is a direct current drive DP miniature diaphragm pump.Radiator 6 is a standard SF series air-cooled radiator, and model is SF14.Heat carrier outer surface coating heat-conductive coating is a FR60 type organosilicon heat-conductive coating.Heat balance treatment fluid case 7 is the igelite material, and capacity is 5L.Heater 8 is an electrical bar, is installed in a side in the treatment fluid casing.
Primer fluid press pump 5 and radiator 6 are closed heater 8 during battery power discharge.Treatment fluid is under the effect of hydraulic pump 5, in the circulatory system of forming by conduit 4, radiator 6, heat balance treatment fluid case 7 and the heat carrier 9 that cooperates with lithium battery group outer surface, flow, take the part heat on lithium battery group surface out of, realize the heat balance of lithium battery group.
The lithium battery group starts heater 8 when charging below 0 ℃, close radiator 6.Treatment fluid is after heater 8 heating of heat balance treatment fluid case 7, under the effect of hydraulic pump 5, flow through heat carrier 9 with lithium-ion-power cell group surface engagement, flow back to 7 heating of heat balance treatment fluid case, and then flow through heat carrier 9, recycle, realize the heat balance of lithium battery group, make battery pack remain on 15 ℃～20 ℃.
After testing, for the 80Ah lithium-ion-power cell, heating speed is 60J/ ℃ of min, discharges under the normal speed of 1C, causes the battery pack heating, and the per minute temperature raises 0.18 ℃, and the heat of generation is 297J.After using above-mentioned heat balance processing unit, the heat treatment solution flow velocity in the circulation circuit system is 72mL/s, reduces by 0.03 ℃ through the temperature per minute of radiator aftertreatment fluid, and the battery surface temperature can reduce by 0.18 ℃, and battery pack reaches heat balance; When ambient temperature is charged at-25 ℃, utilize heater that the heat balance treatment fluid is heated, the heat that per minute is sent into battery pack is 25.9kJ, the flow velocity of heat balance treatment fluid is 48mL/s, treatment fluid per minute temperature raises 2.14 ℃, the battery surface temperature can raise 8 ℃, operate as normal in reaching 15 ℃～20 ℃ temperature range in 5～10 minutes.
Embodiment 2
Be used for the E-CUV electrocar.The lithium-ion-power cell group: rated capacity is 24.2kWh, and rated voltage is 302.4V.84 of built-in 80Ah lithium-ion-power cells are divided into two groups, 42 every group, every group be divided into again two-layer up and down, every layer each 21.Shown in Fig. 3,4, lithium-ion-power cell group heat balance processing unit comprises conduit 4, hydraulic pump 5, radiator 6, heat balance treatment fluid case 7 and heater 8, the heat carrier 9 that cooperates with lithium battery group outer surface; Heat carrier 9 is for having the cavity of through hole.Hydraulic pump 5 one ends are connected through the inflow end 2 of conduit 4 with the heat carrier 9 that cooperates with lithium battery group outer surface, the other end is connected with radiator 6, radiator 6 is connected with heat balance treatment fluid case 7, heat balance treatment fluid case 7 is connected with the heat carrier through hole port of export 3, and described heat balance treatment fluid heater 8 is positioned at heat balance treatment fluid case 7.Heat carrier is two parts before and after same horizontal plane is divided into, and front and back heat carrier inner via hole is communicated with, and form loop checking installation, and the rear portion heat carrier is connected hole arrival end 2, and anterior heat carrier is connected hole exits end 3, and heat carrier 9 and the total contact area of battery surface are 1155000mm
2, account for 26.7% of battery pack total surface area.The no water coolant of love temperature (NPG+) that the du pont company that the heat balance treatment fluid selects for use the market to buy is produced.Hydraulic pump 5 is a direct current drive DP miniature diaphragm pump.Radiator 6 is a standard SF series air-cooled radiator, and model is SF15.The heat-conductive coating of heat carrier outer surface coating is selected the HT-89 thermally conductive and electrically insulating silicone rubber for use.Heat balance treatment fluid case 7 is the igelite material, and capacity is 7L.Heater 8 is an electrical bar, is installed in a side in the treatment fluid casing.
After testing, for the 80Ah lithium-ion-power cell, heating speed is 60J/ ℃ of min, discharges under the normal speed of 1C, causes the battery pack heating, and the per minute temperature raises 0.18 ℃, and the heat of generation is 907.2J.After using above-mentioned heat balance processing unit, the heat treatment solution flow velocity in the circulation circuit system is 144mL/s, reduces by 0.05 ℃ through the temperature per minute of radiator aftertreatment fluid, and battery surface temperature per minute can reduce by 0.18 ℃, and battery pack reaches heat balance; When ambient temperature is charged at-25 ℃, utilize heater that the heat balance treatment fluid is heated, the heat that per minute is sent into battery pack is 80.64kJ, when the flow velocity of heat balance treatment fluid is 64mL/s, treatment fluid per minute temperature raises 5 ℃, the battery surface temperature can raise 8 ℃, operate as normal in reaching 15 ℃～20 ℃ temperature range in 5～10 minutes.
Be used for electric robot.The lithium-ion-power cell group: rated capacity is 1.3kWh, and rated voltage is 21.6V.6 of built-in 60Ah lithium-ion-power cells, same aspect is placed.
Shown in Fig. 5,6, lithium-ion-power cell group heat balance processing unit comprises conduit 4, hydraulic pump 5, radiator 6, heat balance treatment fluid case 7 and heater 8, the heat carrier 9 that cooperates with lithium battery group outer surface, and heat carrier 9 is for having the cavity of through hole; Hydraulic pump 5 one ends are connected through the inflow end 2 of conduit 4 with the heat carrier 9 that cooperates with lithium battery group outer surface, the other end is connected with radiator 6, radiator 6 is connected with heat balance treatment fluid case 7, heat balance treatment fluid case 7 is connected with the heat carrier through hole port of export 3, and described heat balance treatment fluid heater 8 is positioned at heat balance treatment fluid case 7.The structure of heat carrier is with embodiment 1, and top and the bottom heat carrier intermediate throughholes is communicated with, and forms the loop.The upper guide hot body is connected hole arrival end 2, and the lower guide hot body is connected hole exits end 3.The contact area of heat carrier and lithium battery group is 88750mm
2, account for 45.0% of battery pack total surface area.It is 50% water and ethylene glycol mixture that the heat balance treatment fluid is selected ethylene glycol content for use.Hydraulic pump 5 is a direct current drive DP miniature diaphragm pump.Radiator 6 is a standard SF series air-cooled radiator, and model is SF12.The heat-conductive coating of heat carrier outer surface coating is aided with Shenzhen AP-505 heat-conducting silicone grease of high heat filling for based on polysiloxanes.Heat balance treatment fluid case 7 is the igelite material, and capacity is 4L.Heater 8 is an electrical bar, is installed in a side in the treatment fluid casing.
After testing, for the 60Ah lithium-ion-power cell, heating speed is 54J/ ℃ of min, discharges under the normal speed of 1C, causes the battery pack heating, and the per minute temperature raises 0.18 ℃, and the heat of generation is 58.32J.After using above-mentioned heat balance processing unit, the heat treatment solution flow velocity in the circulation circuit system is 46mL/s, and the temperature per minute of treatment fluid reduces by 0.01 ℃, and the battery surface temperature can reduce by 0.18 ℃, thereby reaches heat balance; When ambient temperature is charged at-25 ℃, utilize heater that the heat balance treatment fluid is heated, the heat that per minute is sent into battery pack is 5184J, the flow velocity of design heat balance treatment fluid is 48mL/s, treatment fluid per minute temperature raises 0.4 ℃, operate as normal in reaching 15 ℃～20 ℃ temperature range in 5～10 minutes.
Claims (8)
1, lithium-ion-power cell group heat balance processing unit is characterized in that, described device comprises hydraulic pump, the heat carrier that cooperates with lithium battery group outer surface, heat balance treatment fluid case, radiator and heater; Described heat carrier is positioned at battery case inside, described hydraulic pump, heat balance treatment fluid case, radiator and heater are positioned at the battery case outside, the described inner and heat carrier that cooperates with lithium battery group outer surface of battery case that is positioned at connects and composes the loop that circulates of heat balance treatment fluid by conduit and hydraulic pump, heat balance treatment fluid case, radiator and heater, and described heat carrier is the cavity that has through hole; Described heat balance treatment fluid is no water coolant or water and ethylene glycol mixtures.
2, according to the described lithium-ion-power cell group of claim 1 heat balance processing unit, it is characterized in that, described hydraulic pump one end is connected through the through hole arrival end of conduit with the heat carrier that cooperates with lithium battery group outer surface, the other end is connected with radiator, radiator is connected with the heat balance treatment fluid case port of export, and heat balance treatment fluid tank inlet end is connected with the through hole port of export of heat carrier; Described heat balance treatment fluid heater is positioned at heat balance treatment fluid case.
According to claim 1 or 2 described lithium-ion-power cell group heat balance processing unit, it is characterized in that 3, the described heat carrier that cooperates with lithium battery group outer surface is between the surface or two-layer up and down lithium battery group of battery.
4, according to claim 1 or 2 described lithium-ion-power cell group heat balance processing unit, it is characterized in that described heat carrier outer surface coating heat-conductive coating.
According to the described lithium-ion-power cell group of claim 4 heat balance processing unit, it is characterized in that 5, the heat-conductive coating of described heat carrier outer surface coating is heat conductive rubber or organosilicon heat-conductive coating.
6, according to claim 1 or 2 described lithium-ion-power cell group heat balance processing unit, it is characterized in that described heater is an electrical bar.
7, according to claim 1 or 2 described lithium-ion-power cell group heat balance processing unit, it is characterized in that described through hole is the loop checking installation cavity.
8, according to claim 1 or 2 described lithium-ion-power cell group heat balance processing unit, it is characterized in that described radiator is a fan-cooled radiator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520065819 CN2850003Y (en) | 2005-10-17 | 2005-10-17 | Heat balance treater for lithium ion power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520065819 CN2850003Y (en) | 2005-10-17 | 2005-10-17 | Heat balance treater for lithium ion power battery |
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| CN2850003Y true CN2850003Y (en) | 2006-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200520065819 Expired - Lifetime CN2850003Y (en) | 2005-10-17 | 2005-10-17 | Heat balance treater for lithium ion power battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372169C (en) * | 2005-10-17 | 2008-02-27 | 李慧琪 | Thermal balance treating method and device for lithium ion power battery group |
| CN101789518A (en) * | 2010-03-23 | 2010-07-28 | 上海中科深江电动车辆有限公司 | Heat exchange structure of power battery box |
| CN102088123A (en) * | 2010-12-27 | 2011-06-08 | 高宾 | Power battery pack with cooling system |
-
2005
- 2005-10-17 CN CN 200520065819 patent/CN2850003Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372169C (en) * | 2005-10-17 | 2008-02-27 | 李慧琪 | Thermal balance treating method and device for lithium ion power battery group |
| CN101789518A (en) * | 2010-03-23 | 2010-07-28 | 上海中科深江电动车辆有限公司 | Heat exchange structure of power battery box |
| CN101789518B (en) * | 2010-03-23 | 2012-01-04 | 上海中科深江电动车辆有限公司 | Heat exchange structure of power battery box |
| CN102088123A (en) * | 2010-12-27 | 2011-06-08 | 高宾 | Power battery pack with cooling system |
| CN102088123B (en) * | 2010-12-27 | 2012-12-05 | 高宾 | Power battery pack with cooling system |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Li Huiqi Document name: Notification to Pay the Fees |
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| CX01 | Expiry of patent term |
Granted publication date: 20061220 |
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| EXPY | Termination of patent right or utility model | ||
| DD01 | Delivery of document by public notice |
Addressee: Li Huiqi Document name: Notification of Expiration of Patent Right Duration |