CN103579711A - Power battery liquid cooling system - Google Patents

Power battery liquid cooling system Download PDF

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Publication number
CN103579711A
CN103579711A CN201210279943.3A CN201210279943A CN103579711A CN 103579711 A CN103579711 A CN 103579711A CN 201210279943 A CN201210279943 A CN 201210279943A CN 103579711 A CN103579711 A CN 103579711A
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liquid cooling
cooling system
refrigerator
electrokinetic cell
case
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CN201210279943.3A
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CN103579711B (en
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原诚寅
杨槐
商平
张国
肖冬梅
李亚辉
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Beijing Pride New Energy Battery Co Ltd
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Beijing Pride New Energy Battery Co Ltd
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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 discloses a power battery liquid cooling system which comprises a power battery, a module rack, a liquid cooling wall, a refrigerator and a circulation pump, wherein the power battery is arranged inside the module rack; the module rack is arranged on the liquid cooling wall. The power battery liquid cooling system is characterized by further comprising an independent liquid cooling box and a power supply converting device. Due to adoption of the power battery liquid cooling system, not only is the cooling requirement of the system met, but also the battery energy can be saved, and the output efficiency is improved.

Description

A kind of electrokinetic cell liquid cooling system
Technical field
The present invention relates to electric automobile field, relate in particular to a kind of liquid cooling system of electric automobile battery box.
Background technology
Along with the raising of the mankind to environmental protection requirement, the research of electric automobile and application are more and more subject to people's attention.The power of electric automobile is to be provided by the battery case that a plurality of electrokinetic cells are housed.Electrokinetic cell is to hocket by charging-electric discharge-charging, and the mode recycling is worked.For guaranteeing electric automobile normal operation, battery case need to have cooling system conventionally.Liquid cooling is a kind of common technical scheme.Conventionally the required energy of liquid cooling is provided by electrokinetic cell self.Obviously, this is under some influence the energy output of electrokinetic cell.For addressing this problem, the invention provides a practical electrokinetic cell liquid cooling technical scheme, not only can meet the cooling requirement of system, also there is the energy content of battery of saving.
Summary of the invention
For realizing the above-mentioned technical functionality of liquid cooling system, the present invention adopts following design:
A liquid cooling system, comprises electrokinetic cell, module frame, liquid cooling wall, refrigerator, circulating pump, described electrokinetic cell is contained in described module frame, and described module frame is contained on described liquid cooling wall, it is characterized in that: described liquid cooling system also comprises independent liquid cooling case.
Described independent liquid cooling case refers to that it is not the liquid cooling case of the inner autogamy of refrigerator, is to be independently arranged in liquid cooling system, design volume and shape as required, and the liquid cooling case that can be connected arbitrarily with other liquid cooling parts.Obviously, described liquid cooling case also can be made of one structure with described liquid cooling wall, and a part that is about to described liquid cooling wall is made the cavity structure of a constant volume, forms plate shape liquid cooling case.
According to the battery fluid cooling system of above design, described independent liquid cooling case is the setting of connecting with described liquid cooling wall.
Described series connection setting refers under the promotion of circulating pump, and cooling fluid, from refrigerator flows out, is passed through independent liquid cooling case successively, liquid cooling wall, then return to refrigerator.Concrete mode has two kinds: 1. cooling fluid flows out from refrigerator, first passes through independent liquid cooling case, then passes through liquid cooling wall, returns to refrigerator.2. cooling fluid flows out from refrigerator, first passes through liquid cooling wall, then passes through independent liquid cooling case, returns to refrigerator.
When described independent liquid cooling case and described liquid cooling wall are made of one, equally by described series relationship setting.
Battery fluid cooling system according to above design, also comprises power supply change-over device, and can use respectively external power source or intrasystem electrokinetic cell is described liquid cooling system power supply.
According to the battery fluid cooling system of above design, its working method is: during described power battery charging, described liquid cooling system is by external power source, described refrigerator unlatching work; At described electrokinetic cell interdischarge interval, described liquid cooling system is powered by described electrokinetic cell, and described refrigerator can be worked by one of following 4 kinds of modes:
A. described refrigerator is opened, in running order;
B. described refrigerator cuts out, in non operating state;
C. the start-up time of described refrigerator and operating time are controlled by the time-program(me) of prior setting by a program timer, and its numerical value can be made as the described electrokinetic cell 0%-80% of discharge time;
D. the unlatching of described refrigerator and operating time are controlled in real time by an intelligent control system.
Described intelligent control system, refers to by temperature sensor, intelligent controller, and relay, the control system that the devices such as change over switch form, can, according to the temperature signal of system, open or close described refrigerator by intelligent controller by advance built-in determining program.
According to the battery fluid cooling system of above design, in described independent liquid cooling case, also phase-change material can be housed, form phase-change heat-exchanger.Utilize the latent heat of phase change of phase-change material further to increase the thermal capacitance of system.Described phase-change material can adopt composite phase-change material.
According to the battery fluid cooling system of above design, described phase-change material is contained in canister, and the cumulative volume of described canister is the 20%-80% of described independent liquid cooling case volume.
According to the battery fluid cooling system of above design, described module frame, described liquid cooling wall, described independent liquid cooling case or described phase-change heat-exchanger are contained in a stuffing box, form battery case.
Described stuffing box refers to all junctions on tank wall, and all connections duct all adopts design of Sealing Structure, to meet dustproof and waterproof requirement.
According to the battery fluid cooling system of above design, described stuffing box can also adopt heat insulation structural design, to completely cut off the adverse effect of external environment to system thermal control.
Described heat insulation structural design refers to that all tank walls all adopt heat-barrier material or structure, and all connectors in case and between outside case all adopt device or the parts of heat insulating function.
Liquid cooling wall in the present invention, liquid cooling case can adopt aluminium alloy or steel to make.Cooling fluid can adopt deionized water, pure water, alcohol, glycerine, ethylene glycol and their mixed solution.
Liquid cooling system provided by the present invention, because having independently liquid cooling case or phase-change heat-exchanger, has larger thermal capacity, so refrigerator needn't often be opened and can meet the requirement of system to temperature.By external power source, according to the cycle that discharges and recharges of electrokinetic cell, suitably select the volume of liquid cooling case and the quantity of phase-change material, can realize and make the energy of electrokinetic cell be mainly used in exporting whole discharging and recharging in the cycle, and seldom or hardly for cooling itself, can meet the technical goal of the temperature requirement of system again simultaneously.
Accompanying drawing explanation
Fig. 1 is system and the structural representation of embodiment 1;
Fig. 2 is system and the structural representation of embodiment 2;
Fig. 3 is system and the structural representation of embodiment 3;
Fig. 4 is system and the structural representation of embodiment 4;
Wherein, description of reference numerals is as follows:
1 refrigerator 2 drain pipe 3 circulating pumps
The independent liquid cooling case of 4 liquid cooling wall 5 battery modules frame 6
7 temperature sensor 8 liquid back pipe 9 program timers
10 metal circular tube 11 phase-change heat-exchanger 12 temperature sensors
13 stuffing box 14 intelligent controller 15 heat-insulating and sealing casees
16 mains switches
Embodiment 1
Electrokinetic cell liquid cooling system as shown in Figure 1, comprises electrokinetic cell, module frame 5, and liquid cooling wall 4, refrigerator 1, circulating pump 3, described electrokinetic cell is contained in respectively in 11 module framves 5, and module frame 5 is used MZ mark in the drawings.Liquid cooling wall 4 in figure is welded by upper and lower 2 transverse slats and 4 risers.Each plate is built-in with cooling liquid tube, and the cooling liquid tube in 2 transverse slats is communicated with the cooling liquid tube in 4 risers respectively.11 module framves 5 are contained in respectively on 4 risers, are contained in the electrokinetic cell in module frame 5 and riser keeps in touch and obtain thus cooling.System also comprises an independent liquid cooling case 6.
As shown in the direction of arrow in figure, in system, the circulating path of cooling fluid is: cooling fluid flows out from the drain pipe 2 of refrigerator 1, through circulating pump 3, flow in the upper cross plate of liquid cooling wall 4, from upper cross plate, flow to respectively 4 risers again, from 4 risers flow out, flow to lower cross plate, from lower cross plate flows out, enter in liquid cooling case 6, from liquid cooling case 6, flow out and flow back to refrigerator 1 by liquid back pipe 8.
In this example, liquid cooling wall 4, liquid cooling case 6 all adopts aluminium alloy to make.Cooling fluid adopts deionized water.
System is equipped with power supply change-over device, can use respectively external power source or intrasystem electrokinetic cell for the liquid cooling system power supply in this example.Specific works mode is:
During power battery charging, liquid cooling system passes through external power source.Refrigerator 1 unlatching work.The cooling fluid that flows into refrigerator 1 obtains deep refrigerating, and the temperature of system is reduced.
At electrokinetic cell interdischarge interval, liquid cooling system and external power source disconnect, and turn by the electrokinetic cell of internal system and power.Between refrigerator 1 and electrokinetic cell, be provided with hand switch 16, in this example, switch 16 is in off-state, though refrigerator 1 during battery discharge in non operating state.The cooling fluid flowing in refrigerator 1 flows out without refrigeration.Now the temperature of system can rise to some extent, but because the thermal capacitance of system is larger, when discharge time is not very long, the temperature of system still can meet the demands.
The needed associated conduit device of liquid cooling system described in this example, power supply apparatus, valve, Displaying Meters etc. can be according to known technology setting, and this example is auspicious stating no longer.
This routine system is comparatively simple, cooling by external power source, makes electrokinetic cell for the energy of cooling itself seldom, and energy is all output almost, makes the temperature of system meet the demands simultaneously, is the advantage of this programme.This example is adapted at applying in fast charging and discharging formula battery system.
Obviously, the system in this example also can adopt another kind of mode of operation: make switch 16 in closure state, even if refrigerator 1 is in running order at electrokinetic cell interdischarge interval.This pattern is suitable for the longer system of discharge cycle.
Embodiment 2
Battery fluid cooling system as shown in Figure 2, the difference of itself and embodiment 1 is:
System also comprises the control system that the devices such as by program timer 9 and relevant relay, change over switch form.
At electrokinetic cell interdischarge interval, liquid cooling system turns by intrasystem electrokinetic cell powers, and wherein the operating state of refrigerator 1 is subject to the control of program timer 9.The unlatching operating time of refrigerator 1 can be set flexibly according to actual conditions.In this example: be decided to be to 6 minutes the discharge time of electrokinetic cell, the start-up time of refrigerator 1 is decided to be to electrokinetic cell 1/3 moment of discharge time, i.e. 2 minutes unlatching refrigerators 1 after electrokinetic cell electric discharge, the operating time of refrigerator 1 is set as to 50% of electrokinetic cell discharge time, i.e. refrigerator work 3 minutes.Concrete control circuit and actuator can realize according to known technology, and this example is auspicious stating no longer.
Cooling fluid in this example adopts ethylene glycol.
All the other structures of this example and operation principle are all identical with embodiment 1.
This example has increased program timer 9 and relevant control system, opens refrigerator 1 in the part-time of electrokinetic cell interdischarge interval, with embodiment 1, compares, and can make system more steady in the temperature of electrokinetic cell interdischarge interval.
Embodiment 3
Fig. 3 is an alternative embodiment of the invention.This example is with the difference of embodiment 2:
In this routine liquid cooling case, phase-change material is housed, forms phase-change heat-exchanger 11.Utilize the latent heat of phase change of phase-change material can increase the thermal capacitance of system.Phase-change material is encapsulated in metal circular tube 10, in this example the cumulative volume of all pipes be made as phase-change heat-exchanger 11 liquid cooling case volume 50%.It is the composite phase-change material of main material that phase-change material is selected paraffin.Metal circular tube in this example is made with aluminium alloy, and is welded into one with liquid cooling case.
The circulation Lu Jingwei of cooling fluid in this example: cooling fluid flows out from the drain pipe 2 of refrigerator 1, through circulating pump 3, flow in the liquid cooling case of phase-change heat-exchanger 11, from flowing out, liquid cooling case flow into again in the lower cross plate of liquid cooling wall 4, from lower cross plate, flow to respectively 4 risers again, from 4 risers flow out, flow to upper cross plate, from upper cross plate, flow out and flow back to refrigerator 1 by liquid back pipe 8.
In addition, this routine control system has also comprised temperature sensor 12, and has adopted intelligent controller 14, forms intelligent control system.
At electrokinetic cell interdischarge interval, according to the system temperature situation real-time monitoring, intelligent controller 14 is assigned instruction according to built-in determining program, and opening and closing refrigerator 1 makes the control of system temperature more accurate.This example is suitable for longer situation discharge time.
Liquid cooling wall 4 in this example, module frame 5, phase-change heat-exchanger 11 parts such as grade are all placed in a stuffing box 13, form a sealed cell case.In this example, stuffing box 13 is made by carbon steel, all junctions on tank wall, or connecting hole all adopts rubber seal, and can add painting fluid sealant.Make battery case there is dustproof and waterproof function.
Cooling fluid in this example adopts the mixed solution of pure water and ethylene glycol.
All the other structures of this example are identical with embodiment 2 with operation principle.
Embodiment 4
Liquid cooling system as shown in Figure 4, the difference of it and embodiment 3 is:
Liquid cooling case and liquid cooling wall 4 in this example have been made integrative-structure.The inside of the lower cross plate of liquid cooling wall 4 in figure is made to cavity structure completely, form plate shape liquid cooling case.In this example, in this plate shape liquid cooling case, pack phase-change material into, formed plate shape phase-change heat-exchanger 11.In this example, phase-change material is encapsulated in aluminum pipe equally.The cumulative volume of all pipes is 60% of phase-change heat-exchanger 11 volumes.
The circulation Lu Jingwei of cooling fluid in this example: cooling fluid flows out from the drain pipe 2 of refrigerator 1, through circulating pump 3, flow in the liquid cooling case of plate shape phase-change heat-exchanger 11, from flowing out, liquid cooling case flows to respectively again 4 risers, from 4 risers flow out, flow to upper cross plate, from upper cross plate, flow out and flow back to refrigerator 1 by liquid back pipe 8.Be that plate shape phase-change heat-exchanger 11 still keeps series relationship with the remainder of liquid cooling wall 4.
With embodiment 3, compare, the more compact structure that this is routine, the space on the riser of saving can increase the quantity of module frame.This example has been put 12 module framves, thereby can put more battery, and this is this routine feature.
In like manner, the upper cross plate of liquid cooling wall 4 also can also be made to liquid cooling case or phase-change heat-exchanger, further to increase the thermal capacitance of system.
Liquid cooling wall 4 in this example, module frame 5, phase-change heat-exchanger 11 grades are all placed in a heat-insulating and sealing case 15, form heat-insulating and sealing battery case.Tank wall adopts inner steel lining heat preserving cotton structure, and all metal connecting pieces that are connected outward with case are all equipped with plastics or rubber sleeve, to realize heat insulating function.It is very high that this example is applicable to ambient temperature, or near the situation that also has other thermal source, to avoid the adverse effect of environment to native system thermal control.
All the other structures and the operation principle of this example are identical with embodiment 3.

Claims (8)

1. an electrokinetic cell liquid cooling system, comprises electrokinetic cell, module frame, liquid cooling wall, refrigerator, circulating pump, described electrokinetic cell is contained in described module frame, and described module frame is contained on described liquid cooling wall, it is characterized in that: described liquid cooling system also comprises independent liquid cooling case.
2. battery fluid cooling system according to claim 1, described independent liquid cooling case is the setting of connecting with described liquid cooling wall.
3. battery fluid cooling system according to claim 2, also comprises power supply change-over device, and can use respectively external power source or intrasystem electrokinetic cell is described liquid cooling system power supply.
4. battery fluid cooling system according to claim 3, its working method is: during described power battery charging, described liquid cooling system is by external power source, described refrigerator unlatching work; At described electrokinetic cell interdischarge interval, described liquid cooling system is powered by described electrokinetic cell, and described refrigerator is worked by one of following 4 kinds of modes:
A. described refrigerator is opened, in running order;
B. described refrigerator cuts out, in non operating state;
C. the start-up time of described refrigerator and operating time are controlled by the time-program(me) of prior setting by a program timer, and its numerical value can be made as the described electrokinetic cell 0%-80% of discharge time;
D. the unlatching of described refrigerator and operating time are controlled in real time by an intelligent control system.
5. battery fluid cooling system according to claim 4, is equipped with phase-change material in described independent liquid cooling case.
6. battery fluid cooling system according to claim 5, described phase-change material is contained in canister, and the cumulative volume of described canister is the 20%-80% of described independent liquid cooling case volume.
7. battery fluid cooling system according to claim 6, described module frame, described liquid cooling wall, described independent liquid cooling case or described phase-change heat-exchanger are contained in a stuffing box.
8. battery fluid cooling system according to claim 7, described stuffing box adopts heat insulation structural design.
CN201210279943.3A 2012-08-08 2012-08-08 Power battery liquid cooling system Active CN103579711B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105958155A (en) * 2016-06-07 2016-09-21 深圳市酷凌时代科技有限公司 Phase-change material energy-storage based cooling method and apparatus for power battery
CN109449528A (en) * 2018-09-27 2019-03-08 江苏大学 A kind of phase-change accumulation energy liquid cooling plate, battery pack active thermal management system and control method
CN109980312A (en) * 2017-12-27 2019-07-05 郑州宇通客车股份有限公司 A kind of temperature equalization control system of vehicle-mounted liquid cooling battery case

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101651241A (en) * 2009-09-15 2010-02-17 杨玉生 Temperature control method and accumulator cabinet of phase-change material temperature-control accumulator cabinet for communications
CN101841072A (en) * 2010-02-09 2010-09-22 北汽福田汽车股份有限公司 Liquid cooling system of storage battery and liquid cooling method of storage battery
CN102593553A (en) * 2012-03-01 2012-07-18 奇瑞汽车股份有限公司 Battery pack with temperature adjusting function

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101651241A (en) * 2009-09-15 2010-02-17 杨玉生 Temperature control method and accumulator cabinet of phase-change material temperature-control accumulator cabinet for communications
CN101841072A (en) * 2010-02-09 2010-09-22 北汽福田汽车股份有限公司 Liquid cooling system of storage battery and liquid cooling method of storage battery
CN102593553A (en) * 2012-03-01 2012-07-18 奇瑞汽车股份有限公司 Battery pack with temperature adjusting function

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105958155A (en) * 2016-06-07 2016-09-21 深圳市酷凌时代科技有限公司 Phase-change material energy-storage based cooling method and apparatus for power battery
CN109980312A (en) * 2017-12-27 2019-07-05 郑州宇通客车股份有限公司 A kind of temperature equalization control system of vehicle-mounted liquid cooling battery case
CN109449528A (en) * 2018-09-27 2019-03-08 江苏大学 A kind of phase-change accumulation energy liquid cooling plate, battery pack active thermal management system and control method

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