CN103094640B - Battery pack heat management device - Google Patents
Battery pack heat management device Download PDFInfo
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- CN103094640B CN103094640B CN201310034486.6A CN201310034486A CN103094640B CN 103094640 B CN103094640 B CN 103094640B CN 201310034486 A CN201310034486 A CN 201310034486A CN 103094640 B CN103094640 B CN 103094640B
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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
Abstract
The invention discloses a battery pack heat management device by employing a liquid medium. The device has a perfect battery pack heat management function, and according to the device, the heating and radiating of a battery pack can be finished, so that the battery pack always works in an optimal temperature range, the temperature of each battery unit can be accurately managed, and the time required for heating the battery pack is obviously shortened; and therefore, the consistency and good performance of the battery pack can be well guaranteed. The battery pack heat management device employing the liquid medium mainly comprises a liquid cooling box, an electronic fan, a liquid medium, a thermostat, a secondary liquid tank, a semiconductor and temperature sensor unit, a battery box temperature sensor, a battery unit, an outer battery box shell, a battery box insulation layer, an inner battery box shell, an electric pump, a battery management unit, a heating module and the like.
Description
Technical field
The invention belongs to cell art, relate to a kind of battery pack heat management device, be specifically related to a kind of battery pack heat management device adopting liquid medium.
Background technology
Along with the development of electric automobile whole technology and key components and parts technology, motorcar electric changes into the development trend in order to Global Auto industry, and pure electric automobile etc. mainly adopt the automobile of electrical energy drive to become the Main Trends of The Development of China.
In recent years, lithium-ion-power cell technology achieves marked improvement, and in many lithium ion battery kinds, China mainly uses ferric phosphate lithium cell.
With regard to monomer performance parameter, the instructions for use of electric automobile substantially can be met, but the consistency problem owing to producing and in use procedure, battery management system must be used battery monitoring, management and control.Current battery management system major function has: data acquisition, SOC estimation, balanced management, heat management and failure diagnosis etc., wherein heat management is one of difficulties of generally acknowledging in battery management system exploitation, not only relate to the consistency of use procedure, also relate to safety and SOC estimation precision etc. in battery use procedure.Simultaneously, the environment for use temperature range that automobile is general is-30 DEG C ~ 80 DEG C, the best environment for use temperature of ferric phosphate lithium cell is 20 DEG C ~ 40 DEG C, and less than 0 DEG C is charged to ferric phosphate lithium cell, there is the danger of short circuit, therefore, realize the commercialization of popularizing of electric automobile, particularly pure electric automobile, perfect heat management must be carried out to battery, comprise heating and heat radiation, battery is always worked in best temperature range.
At present, domestic and international most of producer is all the design adopting air to carry out battery thermal management system as medium, because air ratio thermal capacitance is little, little with battery convection transfer rate, heat radiation, firing rate is very slow, there is the problems such as temperature is inconsistent, and heating only adopts electrically heated mode, battery is passed to by cross-ventilation, or adopt the direct heating battery of Electric radiant Heating Film, heating required time is very long, and consume a large amount of battery energy storages, affect the continual mileage of electric automobile, also promoting the use of of electric automobile is badly influenced, therefore in actual use, the heat management function of battery management system mainly still realizes the monitoring of temperature, report to the police and overheat protector, or only have heat sinking function, all imperfect battery thermal management function.
Summary of the invention
For prior art Problems existing, the present invention proposes a kind of battery pack heat management device adopting liquid medium, have perfect battery pack heat management function, heating and the heat radiation of battery pack can be completed, battery pack is made to always work in best temperature range, and the accurate management that can realize each cell temperature, significantly shorten the time needed for battery pack heating, thus ensure the consistency of battery pack and good performance better.
A kind of battery pack heat management device, comprises liquid cools case, electric fan, thermostat, liquid medium, secondary flow container, semiconductor and temperature sensor unit, battery case temperature sensor, battery cell, battery case inner casing, battery case heat-insulation layer, battery case shell, electrodynamic pump, battery management unit and heating module.
Battery cell serial or parallel connection, constitute battery pack, battery case inner casing, battery case heat-insulation layer and battery case shell form battery case body jointly, battery case heat-insulation layer is between battery case inner casing, battery case shell, each battery cell of battery pack is fixed in battery case body, battery case body inside is provided with liquid medium, and the anode and cathode terminals of battery pack is positioned at outside battery case body, and battery case body is hermetically-sealed construction; Semiconductor and temperature sensor unit comprise semiconductor refrigerating element and temperature sensor, each battery cell is all furnished with one group of semiconductor refrigerating element and temperature sensor unit, and semiconductor refrigerating element is all connected with battery management unit by wire harness with temperature sensor; In battery case temperature sensor measurement battery case body, the temperature of liquid medium, is connected with battery management unit by wire harness; The side of battery case body connects the entrance of thermostat by pipeline, an outlet of thermostat connects the entrance of liquid cooler bin by pipeline, the outlet of liquid cools case connects another outlet and heating module of thermostat respectively by pipeline, heating module connects electrodynamic pump by pipeline, electrodynamic pump connects again the opposite side of battery case body by pipeline, the fluid loop of composition liquid medium; Secondary flow container connects liquid cooler bin by pipeline, and realization expansion stores and scarce liquid compensates; Electrodynamic pump is connected with battery management unit by wire harness; Electric fan is fixed on liquid cools case, connects battery management unit by wire harness.
The temperature of liquid medium in the battery case body of battery management unit acquisition battery case temperature sensor measurement, if temperature≤A, battery management unit controls electric priming pump, heating module heats, under the driving of electrodynamic pump, liquid medium flows in fluid loop, in battery case body, liquid medium enters thermostat by pipeline, thermostat cuts out the passage directly leading to liquid cools case, liquid medium enters heating module by thermostat, heating module heats liquid medium, liquid medium after heating exports in battery case body by electrodynamic pump, form the partial circulating of fluid loop, liquid medium after heating heats each battery cell, battery management unit obtains the battery cell temperature of temperature sensor measurement in semiconductor and temperature sensor unit, the temperature of liquid medium in the battery case body simultaneously obtaining battery case temperature sensor measurement, when battery pack reaches optimum temperature, battery management unit controls heating module, electrodynamic pump quits work, if temperature >=B, battery management unit controls electric priming pump, under the driving of electrodynamic pump, liquid medium flows in fluid loop, in battery case body, liquid medium enters thermostat by pipeline, thermostat cuts out the passage directly leading to heating module, liquid medium enters in liquid cools case by thermostat, liquid cools case dispels the heat to liquid medium, liquid medium after heat radiation exports in battery case body by electrodynamic pump, form the systemic circulation of fluid loop, liquid medium after heat radiation dispels the heat to each battery cell, battery management unit obtains the battery cell temperature of temperature sensor measurement in semiconductor and temperature sensor unit, the temperature of liquid medium in the battery case body simultaneously obtaining battery case temperature sensor measurement, when battery pack reaches optimum temperature, battery management unit controls electrodynamic pump and quits work, wherein, if temperature is too high, reach the design temperature that electric fan starts, battery management unit controls electric fan and starts, auxiliary liquid cooler bin carries out the heat radiation of liquid medium.
In the battery case body of setting battery case temperature sensor measurement, the temperature of liquid medium is mean temperature, when battery management unit obtains semiconductor C lower than mean temperature with the battery cell temperature of temperature sensor measurement in temperature sensor unit, battery management unit controls semiconductor and generates heat with the face that the semiconductor refrigerating element in temperature sensor unit contacts with battery cell, freezes in the face contacted with liquid medium; When battery management unit obtains the battery cell temperature of semiconductor and temperature sensor measurement in temperature sensor unit than mean temperature height D, battery management unit controls semiconductor and freezes with the face that the semiconductor refrigerating element in temperature sensor unit contacts with battery cell, the face contacted with liquid medium generates heat, thus accurately controls the consistency of battery cell temperature.
The invention has the advantages that:
1, the battery pack heat management device of employing liquid medium provided by the present invention, have perfect battery pack heat management function, heating and the heat radiation of battery pack can be completed, battery pack is always worked in best temperature range, and the accurate management to each cell temperature can be realized;
2, battery pack heat management device provided by the present invention, adopt liquid as medium, have systemic circulation and partial circulating two fluid loops, the heating of battery pack, radiating efficiency can be significantly improved, and on battery case, there is heat-insulation layer, system effectiveness can be improved further;
3, the battery pack heat management device of employing liquid medium provided by the present invention, use heating module heating liquid medium, then heated the mode of the battery be immersed by liquid medium, significantly can shorten the time needed for battery pack heating, reduce the consumption of a large amount of electric energy of battery pack;
Preferably, described heating module adopts the mode of fuel heater and electric heater combination.
4, the battery pack heat management device of employing liquid medium provided by the present invention, the confession that its heating module can also solve electric automobile is easily warmed up the problem of defrosting;
5, the battery pack heat management device of employing liquid medium provided by the present invention, except for electric automobile, also can be used for the occasion that other battery pack need heat management system.
Accompanying drawing explanation
Fig. 1: battery pack heat management device of the present invention.
In figure:
1-liquid cools case; 2-electric fan; 3-thermostat;
4-liquid medium; The secondary flow container of 5-; 6-semiconductor and temperature sensor unit;
7-battery case temperature sensor; 8-battery cell; 9-battery case inner casing;
10-battery case heat-insulation layer; 11-battery case shell; 12-electrodynamic pump
13-battery management unit; 14-heating module.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
A kind of battery pack heat management device provided by the invention, as shown in Figure 1, liquid cools case 1, electric fan 2, thermostat 3, liquid medium 4, secondary flow container 5, semiconductor and temperature sensor unit 6, battery case temperature sensor 7, battery cell 8, battery case inner casing 9, battery case heat-insulation layer 10, battery case shell 11, electrodynamic pump 12, battery management unit 13 and heating module 14 is mainly comprised.
Battery cell 8 serial or parallel connection, constitutes battery pack, and battery pack is the core component of battery pack thermal management system, and other all parts are all battery pack service, are all to ensure that battery pack can be operated in the temperature province of optimum performance.
Battery case inner casing 9, battery case heat-insulation layer 10 and battery case shell 11 form battery case body jointly, and battery case heat-insulation layer 10 is between battery case inner casing 9, battery case shell 11.Each battery cell 8 of battery pack is fixed in battery case body, and meanwhile, battery case body is also that battery pack externally installs fixing basis.In order to improve the efficiency of battery pack thermal management system, reducing the heat exchange between battery case body and outside air, in battery case body, devising heat-insulation layer 10.
Wherein, preferably, battery case heat-insulation layer 10 selects fire proofing.
Battery case body inside is provided with liquid medium 4, and liquid medium 4 is heat transfer mediums of whole heat management system, have that good fluidity, good insulating, specific heat capacity are large, non-flammable, to characteristics such as metal non-corrosivenesss.
The anode and cathode terminals of battery pack is positioned at outside battery case body, and battery case body is hermetically-sealed construction.
The unit that semiconductor and temperature sensor unit 6 are each battery cell 8 temperature monitoring and accurately control, comprise semiconductor refrigerating element and temperature sensor, each battery cell 8 is all furnished with one group of semiconductor and temperature sensor unit 6, the temperature of each battery cell is accurately controlled by the cold and hot end effect of semiconductor refrigerating element, the temperature of temperature sensor measurement battery cell 8, semiconductor refrigerating element and temperature sensor are all connected with battery management unit 13 by wire harness.
Wherein, preferably, the semiconductor refrigerating element in described semiconductor and temperature sensor unit 6 selects semiconductor chilling plate, and the transducer of thermoelectricity resistance type then selected by temperature sensor.
Battery case temperature sensor 7 is used for monitoring the temperature of battery case body, because liquid medium 4 specific heat capacity is very large, distributing rationally again in conjunction with heat management system, the consistency of each monomer temperature of battery pack can be ensured well, therefore, the mean temperature of namely each battery cell 8 that battery case temperature sensor 7 is monitored, thus also can be used for battery management unit 13 and judge that whether the temperature sensor work on each battery cell 8 normal.It is connected by wire harness with battery management unit 13.
The side of battery case body connects the entrance of thermostat 3 by pipeline, an outlet of thermostat 3 connects the entrance of liquid cooler bin 1 by pipeline, the outlet of liquid cools case 1 connects another outlet and heating module 14 of thermostat 3 respectively by pipeline, heating module 14 is connecting electrodynamic pump 12 by pipeline, electrodynamic pump 12 connects again the opposite side of battery case body by pipeline, battery case body, thermostat 3, electrodynamic pump 12 and pipeline form fluid loop jointly.
Thermostat 3 is for the control of fluid loop and selection, and specific in the present invention, whether thermostat 3 flows through liquid cools case 1 dispel the heat for controlling liquid medium 4, and it is connected in fluid loop by pipeline.
Wherein, preferably, described thermostat 3 adopts the waxtype thermostat that automobile generally uses, and its 26S Proteasome Structure and Function principle is identical with the waxtype thermostat of automobile engine, and just open temp is different.
Electrodynamic pump 12 provides power source for the circulation of whole fluid loop, is connected in fluid loop by pipeline, meanwhile, is connected, and controls by it by wire harness with battery management unit 13.
Liquid cools case 1 for dispelling the heat to liquid medium 4, thus realizes the heat radiation of battery pack, as a part for battery pack thermal management system, is connected in fluid loop by pipeline.
Electric fan 2 is when battery pack temperature is higher than 45 DEG C, and auxiliary liquid cooler bin 1 pair of liquid medium 4 dispels the heat, and realizes the control of stack operating temperature better, works, and be connected by wire harness with it under the control of battery management unit 13.
Heating module 14 is started working lower than during 15-20 DEG C at battery pack temperature, is carried out each battery cell 8 in heating battery group by heating liquid medium 4, to improve the performance of battery pack, and the safety risks such as the short circuit avoiding less than 0 DEG C charging to cause.
Preferably, described heating module 14 adopts the mode of fuel heater and electric heater combination, when electric automobile is in charging process, there is external electric energy supply, or electric automobile during traveling is in zero discharge district, or during short distance traveling, adopt electric heating to carry out the heating of liquid medium 4, other situations all adopt fuel heater to carry out the heating of liquid medium 4.
Secondary flow container 5 connects liquid cooler bin 1 by pipeline, the function of mainly expand storage and the compensation of scarce liquid, and when liquid medium 4 temperature raises, when producing volumetric expansion, the volume that secondary flow container 5 absorbing fluid expands, now has partially liq to flow into secondary flow container 5; When liquid medium 4 temperature reduces, when volume contraction or fluid loop liquid measure reduce to some extent, partially liq flows into loop from secondary flow container 5, compensates loop liquid measure.
Wherein, preferably, described secondary flow container 5 selects automobile overflow tank.
Battery management unit 13 is responsible for the process of each sensor signal of whole battery pack heat management device, the control of the parts such as electric fan 2, semiconductor refrigerating element, electrodynamic pump 12 and heating module 14 in battery pack heat management device, and be connected by wire harness with above-mentioned parts.
When electric automobile normally works, if temperature is lower than 15-20 DEG C, battery management unit 13 controls heating module 14 and works, heating liquid medium 4, simultaneously, battery management unit 13 controls electrodynamic pump 12 and works, liquid medium 4 after heating is inputted in battery case body, each battery cell 8 in liquid medium 4 is immersed in heating, under the driving of electrodynamic pump 12, liquid medium 4 flows to the position of thermostat 3, because temperature is lower, the passage towards liquid cools case 1 do not opened by thermostat 3, like this, liquid medium 4 flows back to heating module 14 through thermostat 3 and again heats, form the partial circulating of fluid loop, under the effect of electrodynamic pump 12, liquid medium 4 starts circulation according to said sequence, each battery cell 8 of continuous heating, when battery management unit 13 detects that battery pack temperature reaches optimum working temperature by the temperature sensor in semiconductor and temperature sensor unit 6 and battery case temperature sensor 7, control heating module 14 and stop heating.In partial circulating, liquid medium 4 is relatively less, can fast speed ground heating battery monomer.
When the temperature in battery case body reaches more than 40-45 DEG C, the passage leading to liquid cools case 1 opened by thermostat 3, simultaneously, close the passage directly leading to heating module, i.e. partial circulating passage, like this, dispel the heat in liquid medium 4 influent cooler bin 1, under the effect of electrodynamic pump 12, flow into battery case through cooled liquid medium 4, dispel the heat to each battery cell 8, then liquid medium 4 is in thermostat 3 again flow back fluid cooler bin 1, form the systemic circulation of fluid loop, until battery pack temperature reaches optimum working temperature.If battery pack is used for comparatively thermal environment, when temperature is too high, battery management unit 13 can control electric fan 2 and work, and auxiliary liquid cooler bin 1 carries out the heat radiation of liquid medium 4.
If battery pack in use, battery management unit 13 is by battery cell and battery case temperature sensor signal, judge the temperature of certain batteries monomer 1 DEG C or lower numerical value (depend on the setting of battery management unit 13 inside) more high or low than mean temperature, battery management unit 13 controls the cold and hot end effect of the semiconductor refrigerating element in semiconductor and temperature sensor unit 6, the temperature of this batteries monomer of accurate control, if battery cell temperature is higher than mean temperature, battery management unit 13 controls semiconductor and freezes with the face that the semiconductor refrigerating element in temperature sensor unit 6 contacts with battery cell, and the face contacted with liquid medium 4 generates heat, thus accurately control the temperature of battery cell, otherwise, if battery cell temperature is lower than mean temperature, battery management unit 13 controls semiconductor and generates heat with the face that the semiconductor refrigerating element in temperature sensor unit 6 contacts with battery cell, and freezes in the face contacted with liquid medium 4, thus accurately controls the consistency of battery cell temperature.
Claims (7)
1. a battery pack heat management device, comprises liquid cools case, electric fan, thermostat, liquid medium, secondary flow container, semiconductor and temperature sensor unit, battery case temperature sensor, battery cell, battery case inner casing, battery case heat-insulation layer, battery case shell, electrodynamic pump, battery management unit and heating module;
Battery cell serial or parallel connection, constitute battery pack, battery case inner casing, battery case heat-insulation layer and battery case shell form battery case body jointly, battery case heat-insulation layer is between battery case inner casing, battery case shell, each battery cell of battery pack is fixed in battery case body, battery case body inside is provided with liquid medium, and the anode and cathode terminals of battery pack is positioned at outside battery case body, and battery case body is hermetically-sealed construction; Semiconductor and temperature sensor unit comprise semiconductor refrigerating element and temperature sensor, each battery cell is all furnished with one group of semiconductor refrigerating element and temperature sensor unit, and semiconductor refrigerating element is all connected with battery management unit by wire harness with temperature sensor; In battery case temperature sensor measurement battery case body, the temperature of liquid medium, is connected with battery management unit by wire harness; The side of battery case body connects the entrance of thermostat by pipeline, an outlet of thermostat connects the entrance of liquid cooler bin by pipeline, the outlet of liquid cools case connects another outlet and heating module of thermostat respectively by pipeline, heating module connects electrodynamic pump by pipeline, electrodynamic pump connects again the opposite side of battery case body by pipeline, the fluid loop of composition liquid medium; Secondary flow container connects liquid cooler bin by pipeline, and realization expansion stores and scarce liquid compensates; Electrodynamic pump is connected with battery management unit by wire harness; Electric fan is fixed on liquid cools case, connects battery management unit by wire harness;
The temperature of liquid medium in the battery case body of battery management unit acquisition battery case temperature sensor measurement, if temperature≤A, battery management unit controls electric priming pump, heating module heats, under the driving of electrodynamic pump, liquid medium flows in fluid loop, in battery case body, liquid medium enters thermostat by pipeline, thermostat cuts out the passage directly leading to liquid cools case, liquid medium enters heating module by thermostat, heating module heats liquid medium, liquid medium after heating exports in battery case body by electrodynamic pump, form the partial circulating of fluid loop, liquid medium after heating heats each battery cell, battery management unit obtains the battery cell temperature of temperature sensor measurement in semiconductor and temperature sensor unit, the temperature of liquid medium in the battery case body simultaneously obtaining battery case temperature sensor measurement, when battery pack reaches optimum temperature, battery management unit controls heating module, electrodynamic pump quits work, if temperature >=B, battery management unit controls electric priming pump, under the driving of electrodynamic pump, liquid medium flows in fluid loop, in battery case body, liquid medium enters thermostat by pipeline, thermostat cuts out the passage directly leading to heating module, liquid medium enters in liquid cools case by thermostat, liquid cools case dispels the heat to liquid medium, liquid medium after heat radiation exports in battery case body by electrodynamic pump, form the systemic circulation of fluid loop, liquid medium after heat radiation dispels the heat to each battery cell, battery management unit obtains the battery cell temperature of temperature sensor measurement in semiconductor and temperature sensor unit, the temperature of liquid medium in the battery case body simultaneously obtaining battery case temperature sensor measurement, when battery pack reaches optimum temperature, battery management unit controls electrodynamic pump and quits work, wherein, if temperature is too high, reach the design temperature that electric fan starts, battery management unit controls electric fan and starts, auxiliary liquid cooler bin carries out the heat radiation of liquid medium,
In the battery case body of setting battery case temperature sensor measurement, the temperature of liquid medium is mean temperature, when battery management unit obtains the battery cell temperature of temperature sensor measurement in semiconductor and temperature sensor unit, C lower than mean temperature, battery management unit controls semiconductor and generates heat with the face that the semiconductor refrigerating element in temperature sensor unit contacts with battery cell, freezes in the face contacted with liquid medium; When battery management unit obtains the battery cell temperature of temperature sensor measurement in semiconductor and temperature sensor unit, than mean temperature height D, battery management unit controls semiconductor and freezes with the face that the semiconductor refrigerating element in temperature sensor unit contacts with battery cell, the face contacted with liquid medium generates heat, thus accurately controls the consistency of battery cell temperature;
Described A=15-20 DEG C;
Described B=40-45 DEG C;
Described temperature C, the value of temperature D are set by user.
2. a kind of battery pack heat management device according to claim 1, described battery case heat-insulation layer adopts fire proofing.
3. a kind of battery pack heat management device according to claim 1, the semiconductor refrigerating element in described semiconductor and temperature sensor unit adopts semiconductor chilling plate.
4. a kind of battery pack heat management device according to claim 1, the temperature sensor in described semiconductor and temperature sensor unit adopts the transducer of thermoelectricity resistance type.
5. a kind of battery pack heat management device according to claim 1, described thermostat adopts waxtype thermostat.
6. a kind of battery pack heat management device according to claim 1, described heating module adopts the mode of fuel heater and electric heater combination, when battery pack heat management device is applied to electric automobile, when electric automobile is in charging process, have external electric energy supply, or electric automobile during traveling is in zero discharge district, or when short distance travels, adopt electric heating to carry out the heating of liquid medium, other situations all adopt fuel heater to carry out the heating of liquid medium.
7. a kind of battery pack heat management device according to claim 1, described secondary flow container selects automobile overflow tank.
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| CN201310034486.6A CN103094640B (en) | 2013-01-29 | 2013-01-29 | Battery pack heat management device |
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| CN201310034486.6A CN103094640B (en) | 2013-01-29 | 2013-01-29 | Battery pack heat management device |
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| CN101222077A (en) * | 2007-12-14 | 2008-07-16 | 广东工业大学 | Jacket type mixed electric car battery device with liquid cooling system |
| CN102361106A (en) * | 2011-09-07 | 2012-02-22 | 航天科工深圳（集团）有限公司 | Storage battery temperature adjusting system |
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| CN103094640A (en) | 2013-05-08 |
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Application publication date: 20130508 Assignee: SHENZHEN GREATLAND ELECTRICS INC. Assignor: Beihang University Contract record no.: 2017110000008 Denomination of invention: Battery pack heat management device Granted publication date: 20150610 License type: Common License Record date: 20170504 |
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